annotate src/p2_deco.c @ 100:9c7d9e7198c0

1.30 release
author heinrichsweikamp
date Fri, 02 May 2014 19:38:14 +0200
parents d7e6dfd5b498
children c61b7a4e317c
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1 // **************************************************************
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2 // p2_deco.c
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3 //
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4 // Created on: 12.05.2009
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5 // Author: chsw
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6 //
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7 // **************************************************************
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8
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9 //////////////////////////////////////////////////////////////////////////////
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10 // OSTC - diving computer code
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11 // Copyright (C) 2011 HeinrichsWeikamp GbR
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12 //
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13 // This program is free software: you can redistribute it and/or modify
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14 // it under the terms of the GNU General Public License as published by
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15 // the Free Software Foundation, either version 3 of the License, or
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16 // (at your option) any later version.
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17 //
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18 // This program is distributed in the hope that it will be useful,
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19 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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20 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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21 // GNU General Public License for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with this program. If not, see <http://www.gnu.org/licenses/>.
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25 //
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26 //////////////////////////////////////////////////////////////////////////////
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27
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28 // *****************************
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29 // ** I N T R O D U C T I O N **
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30 // *****************************
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31 //
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32 // OSTC
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33 //
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34 // code:
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35 // p2_deco_main_c_v101.c
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36 // part2 of the OSTC code
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37 // code with constant O2 partial pressure routines
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38 // under construction !!
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39 //
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40 // summary:
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41 // decompression routines
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42 // for the OSTC experimental project
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43 // written by Christian Weikamp
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44 // last revision __________
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45 // comments added _________
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46 //
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47 // additional files:
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48 // p2_tables_v100.romdata (other files)
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49 // 18f4685_ostc_v100.lkr (linker script)
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50 //
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51 // history:
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52 // 01/03/08 v100: first release candidate
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53 // 03/13/08 v101: start of programming ppO2 code
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54 // 03/13/25 v101a: backup of interrim version with ppO2 calculation
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55 // 03/13/25 v101: open circuit gas change during deco
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56 // 03/13/25 v101: CNS_fraction calculation
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57 // 03/13/26 v101: optimization of tissue calc routines
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58 // 07/xx/08 v102a: debug of bottom time routine
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59 // 09/xx/08 v102d: Gradient Factor Model implemenation
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60 // 10/10/08 v104: renamed to build v103 for v118 stable
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61 // 10/14/08 v104: integration of char_I_depth_last_deco for Gradient Model
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62 // 03/31/09 v107: integration of FONT Incon24
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63 // 05/23/10 v109: 5 gas changes & 1 min timer
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64 // 07/13/10 v110: cns vault added
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65 // 12/25/10 v110: split in three files (deco.c, main.c, definitions.h)
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66 // 2011/01/20: [jDG] Create a common file included in ASM and C code.
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67 // 2011/01/24: [jDG] Make ascenttime an short. No more overflow!
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68 // 2011/01/25: [jDG] Fusion deco array for both models.
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69 // 2011/01/25: [jDG] Use CF(54) to reverse deco order.
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70 // 2011/02/11: [jDG] Reworked gradient-factor implementation.
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71 // 2011/02/15: [jDG] Fixed inconsistencies introduced by gas switch delays.
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72 // 2011/03/21: [jDG] Added gas consumption (CF56 & CF57) evaluation for OCR mode.
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73 // 2011/04/15: [jDG] Store low_depth in 32bits (w/o rounding), for a better stability.
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74 // 2011/04/25: [jDG] Added 1mn mode for CNS calculation, to allow it for decoplanning.
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75 // 2011/04/27: [jDG] Fixed char_O_gradient_factor calculation when model uses gradient-factor.
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76 // 2011/05/02: [jDG] Added "Future TTS" function (CF58).
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77 // 2011/05/17: [jDG] Various cleanups.
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78 // 2011/08/08: [jDG] Computes CNS during deco planning ascent.
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79 // 2011/11/24: [jDG] Slightly faster and better NDL computation.
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80 // 2011/12/17: [mH] Remove of the useless debug stuff
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81 // 2012/02/24: [jDG] Remove missed stop bug.
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82 // 2012/02/25: [jDG] Looking for a more stable LOW grad factor reference.
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83 // 2012/09/10: [mH] Fill char_O_deco_time_for_log for logbook write
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84 // 2012/10/05: [jDG] Better deco_gas_volumes accuracy (average depth, switch between stop).
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85 // 2013/03/05: [jDG] Should vault low_depth too.
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86 // 2013/03/05: [jDG] Wrobell remark: ascent_to_first_stop works better with finer steps (2sec).
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5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
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87 // 2013/05/08: [jDG] A. Salm remark: NOAA tables for CNS are in ATA, not bar.
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88 //
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89 // TODO:
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90 //
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91 // Literature:
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92 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002];
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93 // Schr"oder, Kai & Reith, Steffen; 2000; S"attigungsvorg"ange beim Tauchen, das Modell ZH-L16, Funktionsweise von Tauchcomputern; http://www.achim-und-kai.de/kai/tausim/saett_faq
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94 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html
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95 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf
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96 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops"
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97 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf
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98 //
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99 //
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100
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101 // *********************
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102 // ** I N C L U D E S **
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103 // *********************
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104 #include <math.h>
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105
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106 // ***********************************************
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107 // ** V A R I A B L E S D E F I N I T I O N S **
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108 // ***********************************************
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109
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110 #include "p2_definitions.h"
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111 #define TEST_MAIN
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112 #include "shared_definitions.h"
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113
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114 // Water vapour partial pressure in the lumb.
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115 #define ppWater 0.0627
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116 #define METER_TO_BAR 0.09985
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117 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR)
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118
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119 // Surface security factor
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120 #define SURFACE_DESAT_FACTOR 0.7042
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121
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122 // *************************
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123 // ** P R O T O T Y P E S **
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124 // *************************
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125
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126 static void calc_hauptroutine(void);
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127 static void calc_nullzeit(void);
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128
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129 static void calc_tissue(PARAMETER unsigned char period);
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130 static void calc_limit(void);
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131
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132 static void clear_tissue(void);
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133 static void calc_ascenttime(void);
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134 static void update_startvalues(void);
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135 static void clear_deco_table(void);
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136 static unsigned char update_deco_table(void);
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137
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138 static void sim_tissue(PARAMETER unsigned char period);
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139 static void sim_limit(PARAMETER float GF_current);
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140 static void sim_extra_time(void);
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141 static void calc_dive_interval(void);
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142
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143 static void calc_gradient_factor(void);
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144 static void calc_wo_deco_step_1_min(void);
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145
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146 static void calc_hauptroutine_data_input(void);
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147 static void calc_hauptroutine_update_tissues(void);
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148 static void calc_hauptroutine_calc_deco(void);
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149 static void sim_ascent_to_first_stop(void);
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150
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151 static unsigned char gas_switch_deepest(void);
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152 static void gas_switch_set(void);
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153
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154 static unsigned char calc_nextdecodepth(void);
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155
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156 //---- Bank 5 parameters -----------------------------------------------------
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157 #ifndef UNIX
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158 # pragma udata bank5=0x500
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159 #endif
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160
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161 static float GF_low;
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162 static float GF_high;
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163 static float GF_delta;
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164 static float locked_GF_step; // GF_delta / low_depth
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165
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166 static unsigned char temp_depth_limit;
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167 static unsigned char low_depth; // Depth of deepest stop
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168
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169 // Simulation context: used to predict ascent.
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170 static unsigned char sim_lead_tissue_no; // Leading compatiment number.
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171 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure.
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172
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173 // Real context: what we are doing now.
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174 static float calc_lead_tissue_limit; //
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175
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176 static unsigned char internal_deco_time[NUM_STOPS];
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177 static unsigned char internal_deco_depth[NUM_STOPS];
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178
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179 static float cns_vault;
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180 static float low_depth_vault;
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181 static float pres_tissue_N2_vault[NUM_COMP];
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182 static float pres_tissue_He_vault[NUM_COMP];
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183
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184 //---- Bank 6 parameters -----------------------------------------------------
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185 #ifndef UNIX
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186 # pragma udata bank6=0x600
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187 #endif
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188
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189 static unsigned char ci;
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190 static float pres_respiration;
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191 static float pres_surface;
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192 static float temp_deco;
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193 static float ppN2;
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194 static float ppHe;
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195 static float temp_tissue;
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196 static float N2_ratio; // Breathed gas nitrogen ratio.
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197 static float He_ratio; // Breathed gas helium ratio.
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198 static float var_N2_a; // Bühlmann a, for current N2 tissue.
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199 static float var_N2_b; // Bühlmann b, for current N2 tissue.
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200 static float var_He_a; // Bühlmann a, for current He tissue.
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201 static float var_He_b; // Bühlmann b, for current He tissue.
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202 static float var_N2_e; // Exposition, for current N2 tissue.
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203 static float var_He_e; // Exposition, for current He tissue.
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204 static float var_N2_ht; // Half-time for current N2 tissue.
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205 static float var_He_ht; // Half-time for current N2 tissue.
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206
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207 static float pres_diluent; // new in v.101
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208 static float const_ppO2; // new in v.101
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209
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210 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch.
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211 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch.
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212 static unsigned short sim_dive_mins; // Simulated dive time.
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213 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio.
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214 static float calc_He_ratio; // Simulated (switched) helium ratio.
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215 static float CNS_fraction; // new in v.101
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216 static float float_saturation_multiplier; // new in v.101
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217 static float float_desaturation_multiplier; // new in v.101
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218 static float float_deco_distance; // new in v.101
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219
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220 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109
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221
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222 //---- Bank 7 parameters -----------------------------------------------------
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223 #ifndef UNIX
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224 # pragma udata bank7=0x700
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225 #endif
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226
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227 float pres_tissue_N2[NUM_COMP];
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228 float pres_tissue_He[NUM_COMP];
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229 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes.
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230 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes.
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231
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232 //---- Bank 8 parameters -----------------------------------------------------
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233 #ifndef UNIX
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234 # pragma udata overlay bank8=0x800
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235 static char md_pi_subst[256];
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236 # define C_STACK md_pi_subst // Overlay C-code data stack here, too.
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237 #endif
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238
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239 // Back to bank6 for further tmp data
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240 #ifndef UNIX
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241 # pragma udata bank6
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242 #endif
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243
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244 //////////////////////////////////////////////////////////////////////////////
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245 //////////////////////////////////////////////////////////////////////////////
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246 ///////////////////////////// THE LOOKUP TABLES //////////////////////////////
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247 //////////////////////////////////////////////////////////////////////////////
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248 //////////////////////////////////////////////////////////////////////////////
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249 //
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250 // End of PROM code is 17F00, So push tables on PROM top...
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251 //
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252 #ifndef UNIX
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253 # pragma romdata buhlmann_tables = 0x1DD00 // Needs to be in UPPER bank.
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254 #endif
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255
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256 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified)
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257
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258 //////////////////////////////////////////////////////////////////////////////
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259 //////////////////////////////////////////////////////////////////////////////
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260 ////////////////////////////// THE SUBROUTINES ///////////////////////////////
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261 //////////////////////////////////////////////////////////////////////////////
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262 //////////////////////////////////////////////////////////////////////////////
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263 //
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264 // all new in v.102
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265 // moved from 0x0D000 to 0x0C000 in v.108
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266 #ifndef UNIX
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267 # pragma code p2_deco = 0x0C000
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268 #endif
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269
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270 //////////////////////////////////////////////////////////////////////////////
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271 //////////////////////////////////////////////////////////////////////////////
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272 /////////////////////// U T I L I T I E S /////////////////////////////////
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273 //////////////////////////////////////////////////////////////////////////////
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274 //////////////////////////////////////////////////////////////////////////////
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275
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276 //////////////////////////////////////////////////////////////////////////////
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277 // Bump to blue-screen when an assert is wrong
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278 #ifdef __DEBUG
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279 void assert_failed(PARAMETER short int line)
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280 {
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281 }
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282 #endif
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283
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284 //////////////////////////////////////////////////////////////////////////////
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285 // When calling C code from ASM context, the data stack pointer and
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286 // frames should be reset. Bank8 is used by stack
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287
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288 #ifdef CROSS_COMPILE
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289 # define RESET_C_STACK
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290 #else
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291 # ifdef __DEBUG
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292 # define RESET_C_STACK fillDataStack();
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293 void fillDataStack(void)
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294 {
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295 _asm
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296 LFSR 1,C_STACK
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297 MOVLW 0xCC
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298 loop: MOVWF POSTINC1,0
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299 TSTFSZ FSR1L,0
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300 BRA loop
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301
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302 LFSR 1,C_STACK
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303 LFSR 2,C_STACK
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304 _endasm
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305 }
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306 # else
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307 # define RESET_C_STACK \
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308 _asm \
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309 LFSR 1, C_STACK \
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310 LFSR 2, C_STACK \
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311 _endasm
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312 # endif
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313 #endif
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314
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315 //////////////////////////////////////////////////////////////////////////////
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316 // Fast subroutine to read timer 5.
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317 // Note: result is in 1/32 of msecs (30,51757813µs/bit to be precise)
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318 static unsigned short tmr5(void)
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319 {
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320 #ifndef CROSS_COMPILE
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321 _asm
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322 movff 0xf7c,PRODL // TMR5L
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323 movff 0xf7d,PRODH // TMR5H
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324 _endasm // result in PRODH:PRODL.
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325 #else
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326 return 0;
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327 #endif
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328 }
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329
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330
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331 //////////////////////////////////////////////////////////////////////////////
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332 // read buhlmann tables A and B for compatriment ci
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333 //
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334 static void read_buhlmann_coefficients(void)
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335 {
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336 #ifndef CROSS_COMPILE
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337 // Note: we don't use far rom pointer, because the
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338 // 24 bits is too complex, hence we have to set
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339 // the UPPER page ourself...
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340 // --> Set zero if tables are moved to lower pages !
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341 _asm
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342 movlw 1
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343 movwf TBLPTRU,0
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344 _endasm
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345 #endif
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346
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347 assert( ci < NUM_COMP );
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348
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349 // Use an interleaved array (AoS) to access coefficients with a
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350 // single addressing.
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351 {
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352 overlay rom const float* ptr = &buhlmann_ab[4*ci];
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353 var_N2_a = *ptr++;
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354 var_N2_b = *ptr++;
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355 var_He_a = *ptr++;
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356 var_He_b = *ptr++;
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357 }
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358 }
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359
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360 //////////////////////////////////////////////////////////////////////////////
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361 // read buhlmann tables for compatriment ci
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362 // If period == 0 : 2sec interval
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363 // 1 : 1 min interval
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364 // 2 : 10 min interval.
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365 static void read_buhlmann_times(PARAMETER char period)
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366 {
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367 #ifndef CROSS_COMPILE
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368 // Note: we don't use far rom pointer, because the
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369 // 24 bits is to complex, hence we have to set
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370 // the UPPER page ourself...
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371 // --> Set zero if tables are moved to lower pages !
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372 _asm
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373 movlw 1
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374 movwf TBLPTRU,0
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375 _endasm
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376 #endif
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377
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378 assert( ci < NUM_COMP );
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379
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380 // Integration intervals.
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381 switch(period)
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382 {
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383 case 0: //---- 2 sec -----------------------------------------------------
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384 {
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385 overlay rom const float* ptr = &e2secs[2*ci];
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386 var_N2_e = *ptr++;
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387 var_He_e = *ptr++;
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388 }
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389 break;
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390
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391 case 1: //---- 1 min -----------------------------------------------------
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392 {
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393 overlay rom const float* ptr = &e1min[2*ci];
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394 var_N2_e = *ptr++;
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395 var_He_e = *ptr++;
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396 }
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397 break;
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398
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399 case 2: //---- 10 min ----------------------------------------------------
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400 {
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401 overlay rom const float* ptr = &e10min[2*ci];
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402 var_N2_e = *ptr++;
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403 var_He_e = *ptr++;
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404 }
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405 break;
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406
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407 default:
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408 assert(0); // Never go there...
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409 }
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410 }
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411
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412 //////////////////////////////////////////////////////////////////////////////
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413 // read buhlmann tables for compatriment ci
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414 //
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415 static void read_buhlmann_ht(void)
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416 {
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417
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418 #ifndef CROSS_COMPILE
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419 // Note: we don't use far rom pointer, because the
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420 // 24 bits is to complex, hence we have to set
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421 // the UPPER page ourself...
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422 // --> Set zero if tables are moved to lower pages !
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423 _asm
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424 movlw 1
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425 movwf TBLPTRU,0
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426 _endasm
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427 #endif
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428
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429 assert( ci < NUM_COMP );
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430 {
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431 overlay rom const float* ptr = &buhlmann_ht[2*ci];
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432 var_N2_ht = *ptr++;
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433 var_He_ht = *ptr++;
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434 }
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435
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436 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 );
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437 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 );
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438 }
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439
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440 //////////////////////////////////////////////////////////////////////////////
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441 // calc_nextdecodepth
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442 //
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443 // new in v.102
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444 //
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445 // INPUT, changing during dive:
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446 // temp_deco
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447 // low_depth
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diff changeset
448 //
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449 // INPUT, fixed during dive:
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450 // pres_surface
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451 // GF_delta
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452 // GF_high
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diff changeset
453 // GF_low
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454 // char_I_depth_last_deco
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455 // float_deco_distance
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456 //
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457 // RETURN TRUE iff a stop is needed.
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458 //
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459 // OUTPUT
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460 // locked_GF_step
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diff changeset
461 // temp_depth_limt
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462 // low_depth
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463 //
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464 static unsigned char calc_nextdecodepth(void)
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465 {
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466 //--- Max ascent speed ---------------------------------------------------
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467 // Recompute leading gas limit, at current depth:
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468 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER;
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469
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470 // At most, ascent 1 minute, at 10m/min == 10.0 m.
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471 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0;
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diff changeset
472
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473 // Do we need to stop at current depth ?
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474 overlay unsigned char need_stop = 0;
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475
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476 assert( depth >= -0.2 ); // Allow for 200mbar of weather change.
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477
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478 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------
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479 if( char_I_deco_model != 0 )
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diff changeset
480 {
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481 overlay unsigned char first_stop = 0;
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482 overlay float p;
heinrichsweikamp
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diff changeset
483
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484 sim_limit( GF_low );
heinrichsweikamp
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485 p = sim_lead_tissue_limit - pres_surface;
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486 if( p <= 0.0f )
heinrichsweikamp
parents:
diff changeset
487 goto no_deco_stop; // We can surface directly...
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parents:
diff changeset
488
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diff changeset
489 p *= BAR_TO_METER;
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parents:
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490 if( p < min_depth )
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diff changeset
491 goto no_deco_stop; // First stop is higher than 1' ascent.
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parents:
diff changeset
492
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diff changeset
493 first_stop = 3 * (short)(0.99999 + p*0.333333);
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494 assert( first_stop < 128 );
heinrichsweikamp
parents:
diff changeset
495
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496 // Apply correction for the shallowest stop.
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diff changeset
497 if( first_stop == 3 ) // new in v104
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498 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead.
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diff changeset
499
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parents:
diff changeset
500 // Store the deepest point needing a deco stop as the LOW reference for GF.
heinrichsweikamp
parents:
diff changeset
501 // NOTE: following stops will be validated using this LOW-HIGH gf scale,
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parents:
diff changeset
502 // so if we want to keep coherency, we should not validate this stop
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parents:
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503 // yet, but apply the search to it, as for all the following stops afterward.
heinrichsweikamp
parents:
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504 if( first_stop > low_depth )
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parents:
diff changeset
505 {
heinrichsweikamp
parents:
diff changeset
506 low_depth = first_stop;
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parents:
diff changeset
507 locked_GF_step = GF_delta / first_stop;
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parents:
diff changeset
508 }
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parents:
diff changeset
509
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parents:
diff changeset
510 // We have a stop candidate.
heinrichsweikamp
parents:
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511 // But maybe ascending to the next stop will diminish the constraint,
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parents:
diff changeset
512 // because the GF might decrease more than the preassure gradient...
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513 while(first_stop > 0)
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diff changeset
514 {
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diff changeset
515 overlay unsigned char next_stop; // Next depth (0..90m)
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parents:
diff changeset
516 overlay float pres_stop; // Next pressure (bar)
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parents:
diff changeset
517
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parents:
diff changeset
518 // Check max speed, or reaching surface.
heinrichsweikamp
parents:
diff changeset
519 if( first_stop <= min_depth )
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parents:
diff changeset
520 goto no_deco_stop;
heinrichsweikamp
parents:
diff changeset
521
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parents:
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522 if( first_stop <= char_I_depth_last_deco ) // new in v104
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parents:
diff changeset
523 next_stop = 0;
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parents:
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524 else if( first_stop == 6 )
heinrichsweikamp
parents:
diff changeset
525 next_stop = char_I_depth_last_deco;
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parents:
diff changeset
526 else
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parents:
diff changeset
527 next_stop = first_stop - 3; // Index of next (upper) stop.
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parents:
diff changeset
528
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parents:
diff changeset
529 // Just a check we are indeed above LOW ref.
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parents:
diff changeset
530 assert( next_stop < low_depth );
heinrichsweikamp
parents:
diff changeset
531
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parents:
diff changeset
532 // Total preassure at the new stop candidate:
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parents:
diff changeset
533 pres_stop = next_stop * METER_TO_BAR
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parents:
diff changeset
534 + pres_surface;
heinrichsweikamp
parents:
diff changeset
535
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parents:
diff changeset
536 // Keep GF_low until a first stop depth is found:
heinrichsweikamp
parents:
diff changeset
537 sim_limit( GF_high - next_stop * locked_GF_step );
heinrichsweikamp
parents:
diff changeset
538
heinrichsweikamp
parents:
diff changeset
539 // Check upper limit (lowest pressure tolerated):
heinrichsweikamp
parents:
diff changeset
540 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok
heinrichsweikamp
parents:
diff changeset
541 goto deco_stop_found;
heinrichsweikamp
parents:
diff changeset
542
heinrichsweikamp
parents:
diff changeset
543 // Else, validate that stop and loop...
heinrichsweikamp
parents:
diff changeset
544 first_stop = next_stop;
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parents:
diff changeset
545 }
heinrichsweikamp
parents:
diff changeset
546 assert( first_stop == 0 );
heinrichsweikamp
parents:
diff changeset
547
heinrichsweikamp
parents:
diff changeset
548 no_deco_stop:
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parents:
diff changeset
549 temp_depth_limit = min_depth;
heinrichsweikamp
parents:
diff changeset
550 goto done;
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parents:
diff changeset
551
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parents:
diff changeset
552 // next stop is the last validated depth found, aka first_stop
heinrichsweikamp
parents:
diff changeset
553 deco_stop_found:
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parents:
diff changeset
554 need_stop = 1; // Hit.
heinrichsweikamp
parents:
diff changeset
555 temp_depth_limit = first_stop; // Stop depth, in meter.
heinrichsweikamp
parents:
diff changeset
556
heinrichsweikamp
parents:
diff changeset
557 done:
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parents:
diff changeset
558 ;
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parents:
diff changeset
559 }
heinrichsweikamp
parents:
diff changeset
560 else //---- ZH-L16 model -------------------------------------------------
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parents:
diff changeset
561 {
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parents:
diff changeset
562 overlay float pres_gradient;
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parents:
diff changeset
563
heinrichsweikamp
parents:
diff changeset
564 // Original model
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parents:
diff changeset
565 // optimized in v.101
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parents:
diff changeset
566 // char_I_depth_last_deco included in v.101
heinrichsweikamp
parents:
diff changeset
567
heinrichsweikamp
parents:
diff changeset
568 // Compute sim_lead_tissue_limit too, but just once.
heinrichsweikamp
parents:
diff changeset
569 sim_limit(1.0);
heinrichsweikamp
parents:
diff changeset
570
heinrichsweikamp
parents:
diff changeset
571 pres_gradient = sim_lead_tissue_limit - pres_surface;
heinrichsweikamp
parents:
diff changeset
572 if (pres_gradient >= 0)
heinrichsweikamp
parents:
diff changeset
573 {
heinrichsweikamp
parents:
diff changeset
574 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number;
heinrichsweikamp
parents:
diff changeset
575 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco
heinrichsweikamp
parents:
diff changeset
576 need_stop = 1; // Hit.
heinrichsweikamp
parents:
diff changeset
577
heinrichsweikamp
parents:
diff changeset
578 // Implement last stop at 4m/5m/6m...
heinrichsweikamp
parents:
diff changeset
579 if( temp_depth_limit == 3 )
heinrichsweikamp
parents:
diff changeset
580 temp_depth_limit = char_I_depth_last_deco;
heinrichsweikamp
parents:
diff changeset
581 }
heinrichsweikamp
parents:
diff changeset
582 else
heinrichsweikamp
parents:
diff changeset
583 temp_depth_limit = 0;
heinrichsweikamp
parents:
diff changeset
584 }
heinrichsweikamp
parents:
diff changeset
585
heinrichsweikamp
parents:
diff changeset
586 //---- Check gas change --------------------------------------------------
heinrichsweikamp
parents:
diff changeset
587 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change,
heinrichsweikamp
parents:
diff changeset
588
heinrichsweikamp
parents:
diff changeset
589 return need_stop;
heinrichsweikamp
parents:
diff changeset
590 }
heinrichsweikamp
parents:
diff changeset
591
heinrichsweikamp
parents:
diff changeset
592 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
593 // copy_deco_table
heinrichsweikamp
parents:
diff changeset
594 //
heinrichsweikamp
parents:
diff changeset
595 // Buffer the stops, once computed, so we can continue to display them
heinrichsweikamp
parents:
diff changeset
596 // while computing the next set.
heinrichsweikamp
parents:
diff changeset
597 //
heinrichsweikamp
parents:
diff changeset
598 static void copy_deco_table(void)
heinrichsweikamp
parents:
diff changeset
599 {
heinrichsweikamp
parents:
diff changeset
600 // Copy depth of the first (deepest) stop, because when reversing
heinrichsweikamp
parents:
diff changeset
601 // order, it will be hard to find...
heinrichsweikamp
parents:
diff changeset
602 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F;
heinrichsweikamp
parents:
diff changeset
603 char_O_first_deco_time = internal_deco_time [0];
heinrichsweikamp
parents:
diff changeset
604
heinrichsweikamp
parents:
diff changeset
605 {
heinrichsweikamp
parents:
diff changeset
606 overlay unsigned char x, y;
heinrichsweikamp
parents:
diff changeset
607
heinrichsweikamp
parents:
diff changeset
608 for(x=0; x<NUM_STOPS; x++)
heinrichsweikamp
parents:
diff changeset
609 {
heinrichsweikamp
parents:
diff changeset
610 char_O_deco_depth[x] = internal_deco_depth[x];
heinrichsweikamp
parents:
diff changeset
611 char_O_deco_time [x] = internal_deco_time [x];
heinrichsweikamp
parents:
diff changeset
612 }
heinrichsweikamp
parents:
diff changeset
613
heinrichsweikamp
parents:
diff changeset
614 //Now fill the char_O_deco_time_for_log array
heinrichsweikamp
parents:
diff changeset
615 //---- First: search the first non-null depth
heinrichsweikamp
parents:
diff changeset
616 for(x=(NUM_STOPS-1); x != 0; --x)
heinrichsweikamp
parents:
diff changeset
617 if( internal_deco_depth[x] != 0 ) break;
heinrichsweikamp
parents:
diff changeset
618
heinrichsweikamp
parents:
diff changeset
619 //---- Second: copy to output table (in reverse order)
heinrichsweikamp
parents:
diff changeset
620 for(y=0; y<NUM_STOPS; y++, --x)
heinrichsweikamp
parents:
diff changeset
621 {
heinrichsweikamp
parents:
diff changeset
622 char_O_deco_time_for_log[y] = internal_deco_time [x];
heinrichsweikamp
parents:
diff changeset
623
heinrichsweikamp
parents:
diff changeset
624 // Stop only once the last transfer is done.
heinrichsweikamp
parents:
diff changeset
625 if( x == 0 ) break;
heinrichsweikamp
parents:
diff changeset
626 }
heinrichsweikamp
parents:
diff changeset
627
heinrichsweikamp
parents:
diff changeset
628 //---- Third: fill table end with null
heinrichsweikamp
parents:
diff changeset
629 for(y++; y<NUM_STOPS; y++)
heinrichsweikamp
parents:
diff changeset
630 {
heinrichsweikamp
parents:
diff changeset
631 char_O_deco_time_for_log [y] = 0;
heinrichsweikamp
parents:
diff changeset
632 }
heinrichsweikamp
parents:
diff changeset
633 }
heinrichsweikamp
parents:
diff changeset
634 }
heinrichsweikamp
parents:
diff changeset
635
heinrichsweikamp
parents:
diff changeset
636 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
637 // temp_tissue_safety //
heinrichsweikamp
parents:
diff changeset
638 //
heinrichsweikamp
parents:
diff changeset
639 // outsourced in v.102
heinrichsweikamp
parents:
diff changeset
640 //
heinrichsweikamp
parents:
diff changeset
641 // Apply safety factors for brand ZH-L16 model.
heinrichsweikamp
parents:
diff changeset
642 //
heinrichsweikamp
parents:
diff changeset
643 static void temp_tissue_safety(void)
heinrichsweikamp
parents:
diff changeset
644 {
heinrichsweikamp
parents:
diff changeset
645 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 );
heinrichsweikamp
parents:
diff changeset
646 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 );
heinrichsweikamp
parents:
diff changeset
647
heinrichsweikamp
parents:
diff changeset
648 if( char_I_deco_model == 0 )
heinrichsweikamp
parents:
diff changeset
649 {
heinrichsweikamp
parents:
diff changeset
650 if( temp_tissue < 0.0 )
heinrichsweikamp
parents:
diff changeset
651 temp_tissue *= float_desaturation_multiplier;
heinrichsweikamp
parents:
diff changeset
652 else
heinrichsweikamp
parents:
diff changeset
653 temp_tissue *= float_saturation_multiplier;
heinrichsweikamp
parents:
diff changeset
654 }
heinrichsweikamp
parents:
diff changeset
655 }
heinrichsweikamp
parents:
diff changeset
656
heinrichsweikamp
parents:
diff changeset
657 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
658 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
659 // ** THE JUMP-IN CODE **
heinrichsweikamp
parents:
diff changeset
660 // ** for the asm code **
heinrichsweikamp
parents:
diff changeset
661 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
662 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
663
heinrichsweikamp
parents:
diff changeset
664 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
665 // Called every 2 seconds during diving.
heinrichsweikamp
parents:
diff changeset
666 // update tissues every time.
heinrichsweikamp
parents:
diff changeset
667 //
heinrichsweikamp
parents:
diff changeset
668 // Every 6 seconds (or slower when TTS > 16):
heinrichsweikamp
parents:
diff changeset
669 // - update deco table (char_O_deco_time/depth) with new values.
heinrichsweikamp
parents:
diff changeset
670 // - update ascent time,
heinrichsweikamp
parents:
diff changeset
671 // - set status to zero (so we can check there is new results).
heinrichsweikamp
parents:
diff changeset
672 //
heinrichsweikamp
parents:
diff changeset
673 void deco_calc_hauptroutine(void)
heinrichsweikamp
parents:
diff changeset
674 {
heinrichsweikamp
parents:
diff changeset
675 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
676 calc_hauptroutine();
heinrichsweikamp
parents:
diff changeset
677 int_O_desaturation_time = 65535;
heinrichsweikamp
parents:
diff changeset
678 }
heinrichsweikamp
parents:
diff changeset
679
heinrichsweikamp
parents:
diff changeset
680 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
681 // Reset decompression model:
heinrichsweikamp
parents:
diff changeset
682 // + Set all tissues to equilibrium with Air at ambient pressure.
heinrichsweikamp
parents:
diff changeset
683 // + Reset last stop to 0m
heinrichsweikamp
parents:
diff changeset
684 // + Reset all model output.
heinrichsweikamp
parents:
diff changeset
685 void deco_clear_tissue(void)
heinrichsweikamp
parents:
diff changeset
686 {
heinrichsweikamp
parents:
diff changeset
687 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
688 clear_tissue();
heinrichsweikamp
parents:
diff changeset
689 }
heinrichsweikamp
parents:
diff changeset
690
heinrichsweikamp
parents:
diff changeset
691 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
692 // Called every 1 min during decoplanning.
heinrichsweikamp
parents:
diff changeset
693 // Update tissues for 1 min.
heinrichsweikamp
parents:
diff changeset
694 //
heinrichsweikamp
parents:
diff changeset
695 void deco_calc_tissue(void)
heinrichsweikamp
parents:
diff changeset
696 {
heinrichsweikamp
parents:
diff changeset
697 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
698 calc_hauptroutine_update_tissues();
heinrichsweikamp
parents:
diff changeset
699 }
heinrichsweikamp
parents:
diff changeset
700
heinrichsweikamp
parents:
diff changeset
701 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
702
heinrichsweikamp
parents:
diff changeset
703 void deco_calc_wo_deco_step_1_min(void)
heinrichsweikamp
parents:
diff changeset
704 {
heinrichsweikamp
parents:
diff changeset
705 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
706 calc_wo_deco_step_1_min();
heinrichsweikamp
parents:
diff changeset
707 deco_calc_desaturation_time();
heinrichsweikamp
parents:
diff changeset
708 }
heinrichsweikamp
parents:
diff changeset
709
heinrichsweikamp
parents:
diff changeset
710 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
711
heinrichsweikamp
parents:
diff changeset
712 void deco_calc_dive_interval(void)
heinrichsweikamp
parents:
diff changeset
713 {
heinrichsweikamp
parents:
diff changeset
714 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
715 calc_dive_interval();
heinrichsweikamp
parents:
diff changeset
716 }
heinrichsweikamp
parents:
diff changeset
717
heinrichsweikamp
parents:
diff changeset
718 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
719 // Find current gas in the list (if any).
heinrichsweikamp
parents:
diff changeset
720 //
heinrichsweikamp
parents:
diff changeset
721 // Input: char_I_current_gas = 1..6
heinrichsweikamp
parents:
diff changeset
722 //
heinrichsweikamp
parents:
diff changeset
723 // Output: sim_gas_last_depth = 0..5, temp_depth_limit.
heinrichsweikamp
parents:
diff changeset
724 //
heinrichsweikamp
parents:
diff changeset
725 static void gas_switch_find_current(void)
heinrichsweikamp
parents:
diff changeset
726 {
heinrichsweikamp
parents:
diff changeset
727 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) );
heinrichsweikamp
parents:
diff changeset
728
heinrichsweikamp
parents:
diff changeset
729 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5
heinrichsweikamp
parents:
diff changeset
730 {
heinrichsweikamp
parents:
diff changeset
731 sim_gas_last_used = char_I_current_gas;
heinrichsweikamp
parents:
diff changeset
732
heinrichsweikamp
parents:
diff changeset
733 // Note: if current is first gas, we must find it, but not set
heinrichsweikamp
parents:
diff changeset
734 // last depth change to surface.
heinrichsweikamp
parents:
diff changeset
735 if( char_I_deco_gas_change[sim_gas_last_used-1] )
heinrichsweikamp
parents:
diff changeset
736 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1];
heinrichsweikamp
parents:
diff changeset
737 }
heinrichsweikamp
parents:
diff changeset
738 else
heinrichsweikamp
parents:
diff changeset
739 sim_gas_last_used = 0; // Gas 6 = manual set
heinrichsweikamp
parents:
diff changeset
740 }
heinrichsweikamp
parents:
diff changeset
741
heinrichsweikamp
parents:
diff changeset
742 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
743 // Find deepest available gas.
heinrichsweikamp
parents:
diff changeset
744 //
heinrichsweikamp
parents:
diff changeset
745 // Input: temp_depth_limit,
heinrichsweikamp
parents:
diff changeset
746 // deco_gas_change[]
heinrichsweikamp
parents:
diff changeset
747 // sim_gas_depth_used, sim_dive_mins.
heinrichsweikamp
parents:
diff changeset
748 //
heinrichsweikamp
parents:
diff changeset
749 // RETURNS TRUE if a stop is needed for gas switch.
heinrichsweikamp
parents:
diff changeset
750 //
heinrichsweikamp
parents:
diff changeset
751 // Output: temp_depth_limit, sim_gas_depth_used IFF the is a switch.
heinrichsweikamp
parents:
diff changeset
752 //
heinrichsweikamp
parents:
diff changeset
753 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used
heinrichsweikamp
parents:
diff changeset
754 // are null), or during the ascent to make sure we are not passing a
heinrichsweikamp
parents:
diff changeset
755 // stop (in which case both can be already set).
heinrichsweikamp
parents:
diff changeset
756 //
heinrichsweikamp
parents:
diff changeset
757 static unsigned char gas_switch_deepest(void)
heinrichsweikamp
parents:
diff changeset
758 {
heinrichsweikamp
parents:
diff changeset
759 overlay unsigned char switch_deco = 0, switch_last = 0;
heinrichsweikamp
parents:
diff changeset
760
heinrichsweikamp
parents:
diff changeset
761 if (char_I_const_ppO2 == 0)
heinrichsweikamp
parents:
diff changeset
762 {
heinrichsweikamp
parents:
diff changeset
763 overlay unsigned char j;
heinrichsweikamp
parents:
diff changeset
764
heinrichsweikamp
parents:
diff changeset
765 // Loop over all enabled gas, to find the deepest one,
heinrichsweikamp
parents:
diff changeset
766 // above last used gas, but below temp_depth_limit.
heinrichsweikamp
parents:
diff changeset
767 for(j=0; j<NUM_GAS; ++j)
heinrichsweikamp
parents:
diff changeset
768 {
heinrichsweikamp
parents:
diff changeset
769 // Gas not (yet) allowed ? Skip !
heinrichsweikamp
parents:
diff changeset
770 if( temp_depth_limit > deco_gas_change[j] )
heinrichsweikamp
parents:
diff changeset
771 continue;
heinrichsweikamp
parents:
diff changeset
772
heinrichsweikamp
parents:
diff changeset
773 // Gas deeper (or equal) than the current one ? Skip !
heinrichsweikamp
parents:
diff changeset
774 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth )
heinrichsweikamp
parents:
diff changeset
775 continue;
heinrichsweikamp
parents:
diff changeset
776
heinrichsweikamp
parents:
diff changeset
777 // First, or deeper ?
heinrichsweikamp
parents:
diff changeset
778 if( switch_deco < deco_gas_change[j] )
heinrichsweikamp
parents:
diff changeset
779 {
heinrichsweikamp
parents:
diff changeset
780 switch_deco = deco_gas_change[j];
heinrichsweikamp
parents:
diff changeset
781 switch_last = j+1; // 1..5
heinrichsweikamp
parents:
diff changeset
782 }
heinrichsweikamp
parents:
diff changeset
783 }
heinrichsweikamp
parents:
diff changeset
784 }
heinrichsweikamp
parents:
diff changeset
785
heinrichsweikamp
parents:
diff changeset
786 // If there is a better gas available
heinrichsweikamp
parents:
diff changeset
787 if( switch_deco )
heinrichsweikamp
parents:
diff changeset
788 {
heinrichsweikamp
parents:
diff changeset
789 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco );
heinrichsweikamp
parents:
diff changeset
790
heinrichsweikamp
parents:
diff changeset
791 sim_gas_last_depth = switch_deco;
heinrichsweikamp
parents:
diff changeset
792 sim_gas_last_used = switch_last;
heinrichsweikamp
parents:
diff changeset
793 return 0;
heinrichsweikamp
parents:
diff changeset
794 }
heinrichsweikamp
parents:
diff changeset
795 return 0;
heinrichsweikamp
parents:
diff changeset
796 }
heinrichsweikamp
parents:
diff changeset
797
heinrichsweikamp
parents:
diff changeset
798 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
799 // Calculate gas switches
heinrichsweikamp
parents:
diff changeset
800 //
heinrichsweikamp
parents:
diff changeset
801 //
heinrichsweikamp
parents:
diff changeset
802 // Input: N2_ratio, He_ratio.
heinrichsweikamp
parents:
diff changeset
803 // sim_gas_last_used
heinrichsweikamp
parents:
diff changeset
804 //
heinrichsweikamp
parents:
diff changeset
805 // Output: calc_N2_ratio, calc_He_ratio
heinrichsweikamp
parents:
diff changeset
806 //
heinrichsweikamp
parents:
diff changeset
807 static void gas_switch_set(void)
heinrichsweikamp
parents:
diff changeset
808 {
heinrichsweikamp
parents:
diff changeset
809 assert( sim_gas_last_used <= NUM_GAS );
heinrichsweikamp
parents:
diff changeset
810
heinrichsweikamp
parents:
diff changeset
811 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas.
heinrichsweikamp
parents:
diff changeset
812 {
heinrichsweikamp
parents:
diff changeset
813 calc_N2_ratio = N2_ratio;
heinrichsweikamp
parents:
diff changeset
814 calc_He_ratio = He_ratio;
heinrichsweikamp
parents:
diff changeset
815 }
heinrichsweikamp
parents:
diff changeset
816 else
heinrichsweikamp
parents:
diff changeset
817 {
heinrichsweikamp
parents:
diff changeset
818 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01;
heinrichsweikamp
parents:
diff changeset
819 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01;
heinrichsweikamp
parents:
diff changeset
820 }
heinrichsweikamp
parents:
diff changeset
821
heinrichsweikamp
parents:
diff changeset
822 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 );
heinrichsweikamp
parents:
diff changeset
823 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 );
heinrichsweikamp
parents:
diff changeset
824 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 );
heinrichsweikamp
parents:
diff changeset
825 }
heinrichsweikamp
parents:
diff changeset
826
heinrichsweikamp
parents:
diff changeset
827 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
828 //
heinrichsweikamp
parents:
diff changeset
829 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix.
heinrichsweikamp
parents:
diff changeset
830 // temp_deco : simulated respiration pressure
heinrichsweikamp
parents:
diff changeset
831 // float_deco_distance : security factor.
heinrichsweikamp
parents:
diff changeset
832 // Water-vapor pressure inside limbs (ppWater).
heinrichsweikamp
parents:
diff changeset
833 //
heinrichsweikamp
parents:
diff changeset
834 // Output: ppN2, ppHe.
heinrichsweikamp
parents:
diff changeset
835 //
heinrichsweikamp
parents:
diff changeset
836 static void sim_alveolar_presures(void)
heinrichsweikamp
parents:
diff changeset
837 {
heinrichsweikamp
parents:
diff changeset
838 overlay float deco_diluent = temp_deco; // new in v.101
heinrichsweikamp
parents:
diff changeset
839
heinrichsweikamp
parents:
diff changeset
840 // Take deco offset into account, but not at surface.
heinrichsweikamp
parents:
diff changeset
841 // Note: this should be done on ambiant pressure, hence before
heinrichsweikamp
parents:
diff changeset
842 // computing the diluant partial pressure...
heinrichsweikamp
parents:
diff changeset
843 if( deco_diluent > pres_surface )
heinrichsweikamp
parents:
diff changeset
844 deco_diluent += float_deco_distance;
heinrichsweikamp
parents:
diff changeset
845
heinrichsweikamp
parents:
diff changeset
846 //---- CCR mode : deco gas switch ? --------------------------------------
heinrichsweikamp
parents:
diff changeset
847 if( char_I_const_ppO2 != 0 )
heinrichsweikamp
parents:
diff changeset
848 {
heinrichsweikamp
parents:
diff changeset
849 // In CCR mode, use calc_XX_ratio instead of XX_ratio.
heinrichsweikamp
parents:
diff changeset
850 // Note: PPO2 and ratios are known outside the lumbs, so there is no
heinrichsweikamp
parents:
diff changeset
851 // ppWater in the equations below:
heinrichsweikamp
parents:
diff changeset
852 deco_diluent -= const_ppO2;
heinrichsweikamp
parents:
diff changeset
853 deco_diluent /= calc_N2_ratio + calc_He_ratio;
heinrichsweikamp
parents:
diff changeset
854
heinrichsweikamp
parents:
diff changeset
855 if (deco_diluent > temp_deco)
heinrichsweikamp
parents:
diff changeset
856 deco_diluent = temp_deco;
heinrichsweikamp
parents:
diff changeset
857 }
heinrichsweikamp
parents:
diff changeset
858
heinrichsweikamp
parents:
diff changeset
859 if( deco_diluent > ppWater )
heinrichsweikamp
parents:
diff changeset
860 {
heinrichsweikamp
parents:
diff changeset
861 ppN2 = calc_N2_ratio * (deco_diluent - ppWater);
heinrichsweikamp
parents:
diff changeset
862 ppHe = calc_He_ratio * (deco_diluent - ppWater);
heinrichsweikamp
parents:
diff changeset
863 }
heinrichsweikamp
parents:
diff changeset
864 else
heinrichsweikamp
parents:
diff changeset
865 {
heinrichsweikamp
parents:
diff changeset
866 ppN2 = 0.0;
heinrichsweikamp
parents:
diff changeset
867 ppHe = 0.0;
heinrichsweikamp
parents:
diff changeset
868 }
heinrichsweikamp
parents:
diff changeset
869 assert( 0.0 <= ppN2 && ppN2 < 14.0 );
heinrichsweikamp
parents:
diff changeset
870 assert( 0.0 <= ppHe && ppHe < 14.0 );
heinrichsweikamp
parents:
diff changeset
871 }
heinrichsweikamp
parents:
diff changeset
872
heinrichsweikamp
parents:
diff changeset
873 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
874 // clear_tissue
heinrichsweikamp
parents:
diff changeset
875 //
heinrichsweikamp
parents:
diff changeset
876 // optimized in v.101 (var_N2_a)
heinrichsweikamp
parents:
diff changeset
877 //
heinrichsweikamp
parents:
diff changeset
878 // preload tissues with standard pressure for the given ambient pressure.
heinrichsweikamp
parents:
diff changeset
879 // Note: fixed N2_ratio for standard air.
heinrichsweikamp
parents:
diff changeset
880 //
heinrichsweikamp
parents:
diff changeset
881 static void clear_tissue(void)
heinrichsweikamp
parents:
diff changeset
882 {
heinrichsweikamp
parents:
diff changeset
883 overlay float p;
heinrichsweikamp
parents:
diff changeset
884
heinrichsweikamp
parents:
diff changeset
885 // Kludge: the 0.0002 of 0.7902 are missing with standard air.
heinrichsweikamp
parents:
diff changeset
886 N2_ratio = 0.7902;
heinrichsweikamp
parents:
diff changeset
887 pres_respiration = int_I_pres_respiration * 0.001;
heinrichsweikamp
parents:
diff changeset
888
heinrichsweikamp
parents:
diff changeset
889 p = N2_ratio * (pres_respiration - ppWater);
heinrichsweikamp
parents:
diff changeset
890 for(ci=0; ci<NUM_COMP; ci++)
heinrichsweikamp
parents:
diff changeset
891 {
heinrichsweikamp
parents:
diff changeset
892 // cycle through the 16 Bühlmann N2 tissues
heinrichsweikamp
parents:
diff changeset
893 pres_tissue_N2[ci] = p;
heinrichsweikamp
parents:
diff changeset
894
heinrichsweikamp
parents:
diff changeset
895 // cycle through the 16 Bühlmann tissues for Helium
heinrichsweikamp
parents:
diff changeset
896 pres_tissue_He[ci] = 0.0;
heinrichsweikamp
parents:
diff changeset
897 }
heinrichsweikamp
parents:
diff changeset
898
heinrichsweikamp
parents:
diff changeset
899 clear_deco_table();
heinrichsweikamp
parents:
diff changeset
900 char_O_deco_status = 0;
heinrichsweikamp
parents:
diff changeset
901 char_O_nullzeit = 0;
heinrichsweikamp
parents:
diff changeset
902 int_O_ascenttime = 0;
heinrichsweikamp
parents:
diff changeset
903 char_O_gradient_factor = 0;
heinrichsweikamp
parents:
diff changeset
904 char_O_relative_gradient_GF = 0;
heinrichsweikamp
parents:
diff changeset
905
heinrichsweikamp
parents:
diff changeset
906 calc_lead_tissue_limit = 0.0;
heinrichsweikamp
parents:
diff changeset
907 char_O_gtissue_no = 0;
heinrichsweikamp
parents:
diff changeset
908 }
heinrichsweikamp
parents:
diff changeset
909
heinrichsweikamp
parents:
diff changeset
910 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
911 // calc_hauptroutine
heinrichsweikamp
parents:
diff changeset
912 //
heinrichsweikamp
parents:
diff changeset
913 // this is the major code in dive mode calculates:
heinrichsweikamp
parents:
diff changeset
914 // the tissues,
heinrichsweikamp
parents:
diff changeset
915 // the bottom time,
heinrichsweikamp
parents:
diff changeset
916 // and simulates the ascend with all deco stops.
heinrichsweikamp
parents:
diff changeset
917 //
heinrichsweikamp
parents:
diff changeset
918 // The deco_state sequence is :
heinrichsweikamp
parents:
diff changeset
919 // 3 (at surface)
heinrichsweikamp
parents:
diff changeset
920 // +---> 0 : calc nullzeit
heinrichsweikamp
parents:
diff changeset
921 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu)
heinrichsweikamp
parents:
diff changeset
922 // | +-> 1 : simulate up to 16min of stops.
heinrichsweikamp
parents:
diff changeset
923 // | +------< not finished
heinrichsweikamp
parents:
diff changeset
924 // +--------< finish
heinrichsweikamp
parents:
diff changeset
925 //
heinrichsweikamp
parents:
diff changeset
926 // Added steps 6,5 for @+5 calculation:
heinrichsweikamp
parents:
diff changeset
927 // 6 = ascent to first stop (same as 2), except continue to 7
heinrichsweikamp
parents:
diff changeset
928 // 7 = same as 1, except loop to 7.
heinrichsweikamp
parents:
diff changeset
929 //
heinrichsweikamp
parents:
diff changeset
930 static void calc_hauptroutine(void)
heinrichsweikamp
parents:
diff changeset
931 {
heinrichsweikamp
parents:
diff changeset
932 static unsigned char backup_gas_used;
heinrichsweikamp
parents:
diff changeset
933 static unsigned char backup_gas_depth;
heinrichsweikamp
parents:
diff changeset
934
heinrichsweikamp
parents:
diff changeset
935 calc_hauptroutine_data_input();
heinrichsweikamp
parents:
diff changeset
936
heinrichsweikamp
parents:
diff changeset
937 calc_hauptroutine_update_tissues();
heinrichsweikamp
parents:
diff changeset
938 calc_gradient_factor();
heinrichsweikamp
parents:
diff changeset
939
heinrichsweikamp
parents:
diff changeset
940 // toggle between calculation for nullzeit (bottom time),
heinrichsweikamp
parents:
diff changeset
941 // deco stops
heinrichsweikamp
parents:
diff changeset
942 // and more deco stops (continue)
heinrichsweikamp
parents:
diff changeset
943 switch( char_O_deco_status )
heinrichsweikamp
parents:
diff changeset
944 {
heinrichsweikamp
parents:
diff changeset
945 case 3: //---- At surface: start a new dive ------------------------------
heinrichsweikamp
parents:
diff changeset
946 clear_deco_table();
heinrichsweikamp
parents:
diff changeset
947 copy_deco_table();
heinrichsweikamp
parents:
diff changeset
948 int_O_ascenttime = 0; // Reset DTR.
heinrichsweikamp
parents:
diff changeset
949 int_O_extra_ascenttime = 0;
heinrichsweikamp
parents:
diff changeset
950 char_O_nullzeit = 0; // Reset bottom time.
heinrichsweikamp
parents:
diff changeset
951 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration.
heinrichsweikamp
parents:
diff changeset
952
heinrichsweikamp
parents:
diff changeset
953 // Values that should be reset just once for the full real dive.
heinrichsweikamp
parents:
diff changeset
954 // This is used to record the lowest stop for the whole dive,
heinrichsweikamp
parents:
diff changeset
955 // Including ACCROSS all simulated ascent.
heinrichsweikamp
parents:
diff changeset
956 low_depth = 0;
heinrichsweikamp
parents:
diff changeset
957 locked_GF_step = 0.0;
heinrichsweikamp
parents:
diff changeset
958
heinrichsweikamp
parents:
diff changeset
959 // Reset gas switch history.
heinrichsweikamp
parents:
diff changeset
960 backup_gas_used = sim_gas_last_used = 0;
heinrichsweikamp
parents:
diff changeset
961 backup_gas_depth = sim_gas_last_depth = 0;
heinrichsweikamp
parents:
diff changeset
962 sim_dive_mins = 0;
heinrichsweikamp
parents:
diff changeset
963 break;
heinrichsweikamp
parents:
diff changeset
964
heinrichsweikamp
parents:
diff changeset
965 case 0: //---- bottom time -----------------------------------------------
heinrichsweikamp
parents:
diff changeset
966 default:
heinrichsweikamp
parents:
diff changeset
967 gas_switch_find_current(); // Lookup for current gas & time.
heinrichsweikamp
parents:
diff changeset
968 gas_switch_set(); // setup calc_ratio's
heinrichsweikamp
parents:
diff changeset
969
heinrichsweikamp
parents:
diff changeset
970 calc_nullzeit();
heinrichsweikamp
parents:
diff changeset
971 if( char_O_nullzeit > 0 ) // Some NDL time left ?
heinrichsweikamp
parents:
diff changeset
972 {
heinrichsweikamp
parents:
diff changeset
973 char_O_deco_status = 0; // YES: recalc ndl next time.
heinrichsweikamp
parents:
diff changeset
974 clear_deco_table(); // Also clear stops !
heinrichsweikamp
parents:
diff changeset
975 copy_deco_table();
heinrichsweikamp
parents:
diff changeset
976 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim)
heinrichsweikamp
parents:
diff changeset
977 }
heinrichsweikamp
parents:
diff changeset
978 else
heinrichsweikamp
parents:
diff changeset
979 char_O_deco_status = 2; // NO: calc ascent next time.
heinrichsweikamp
parents:
diff changeset
980 break;
heinrichsweikamp
parents:
diff changeset
981
heinrichsweikamp
parents:
diff changeset
982 case 2: //---- Simulate ascent to first stop -----------------------------
heinrichsweikamp
parents:
diff changeset
983 case 6: // @+5min variation
heinrichsweikamp
parents:
diff changeset
984 // Check proposed gas at begin of ascent simulation
heinrichsweikamp
parents:
diff changeset
985 sim_dive_mins = int_I_divemins; // Init current time.
heinrichsweikamp
parents:
diff changeset
986
heinrichsweikamp
parents:
diff changeset
987 gas_switch_find_current(); // Lookup for current gas & time.
heinrichsweikamp
parents:
diff changeset
988 gas_switch_set(); // setup calc_ratio's
heinrichsweikamp
parents:
diff changeset
989
heinrichsweikamp
parents:
diff changeset
990 backup_gas_used = sim_gas_last_used; // And save for later simu steps.
heinrichsweikamp
parents:
diff changeset
991 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps.
heinrichsweikamp
parents:
diff changeset
992
heinrichsweikamp
parents:
diff changeset
993 sim_ascent_to_first_stop();
heinrichsweikamp
parents:
diff changeset
994
heinrichsweikamp
parents:
diff changeset
995 // Calc stops next time (deco or gas switch).
heinrichsweikamp
parents:
diff changeset
996 char_O_deco_status = 1 | ( char_O_deco_status & 4 );
heinrichsweikamp
parents:
diff changeset
997 break;
heinrichsweikamp
parents:
diff changeset
998
heinrichsweikamp
parents:
diff changeset
999 case 1: //---- Simulate stops --------------------------------------------
heinrichsweikamp
parents:
diff changeset
1000 case 5: // @+5 variation.
heinrichsweikamp
parents:
diff changeset
1001 calc_hauptroutine_calc_deco();
heinrichsweikamp
parents:
diff changeset
1002
heinrichsweikamp
parents:
diff changeset
1003 // If simulation is finished, restore the GF low reference, so that
heinrichsweikamp
parents:
diff changeset
1004 // next ascent simulation is done from the current depth:
heinrichsweikamp
parents:
diff changeset
1005 if( (char_O_deco_status & 3) == 0 )
heinrichsweikamp
parents:
diff changeset
1006 {
heinrichsweikamp
parents:
diff changeset
1007 sim_gas_last_used = backup_gas_used;
heinrichsweikamp
parents:
diff changeset
1008 sim_gas_last_depth = backup_gas_depth;
heinrichsweikamp
parents:
diff changeset
1009 }
heinrichsweikamp
parents:
diff changeset
1010 break;
heinrichsweikamp
parents:
diff changeset
1011 }
heinrichsweikamp
parents:
diff changeset
1012 }
heinrichsweikamp
parents:
diff changeset
1013
heinrichsweikamp
parents:
diff changeset
1014 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1015 // calc_hauptroutine_data_input
heinrichsweikamp
parents:
diff changeset
1016 //
heinrichsweikamp
parents:
diff changeset
1017 // Reset all C-code dive parameters from their ASM-code values.
heinrichsweikamp
parents:
diff changeset
1018 // Detect gas change condition.
heinrichsweikamp
parents:
diff changeset
1019 //
heinrichsweikamp
parents:
diff changeset
1020 void calc_hauptroutine_data_input(void)
heinrichsweikamp
parents:
diff changeset
1021 {
heinrichsweikamp
parents:
diff changeset
1022 overlay short int_temp;
heinrichsweikamp
parents:
diff changeset
1023 overlay unsigned char g;
heinrichsweikamp
parents:
diff changeset
1024
heinrichsweikamp
parents:
diff changeset
1025 pres_respiration = int_I_pres_respiration * 0.001;
heinrichsweikamp
parents:
diff changeset
1026 pres_surface = int_I_pres_surface * 0.001;
heinrichsweikamp
parents:
diff changeset
1027 N2_ratio = char_I_N2_ratio * 0.01;
heinrichsweikamp
parents:
diff changeset
1028 He_ratio = char_I_He_ratio * 0.01;
heinrichsweikamp
parents:
diff changeset
1029 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar.
heinrichsweikamp
parents:
diff changeset
1030
heinrichsweikamp
parents:
diff changeset
1031 // ____________________________________________________
heinrichsweikamp
parents:
diff changeset
1032 //
heinrichsweikamp
parents:
diff changeset
1033 // _____________ G A S _ C H A N G E S ________________
heinrichsweikamp
parents:
diff changeset
1034 // ____________________________________________________
heinrichsweikamp
parents:
diff changeset
1035
heinrichsweikamp
parents:
diff changeset
1036 // Keep a margin of 150mbar = 1.50m
heinrichsweikamp
parents:
diff changeset
1037 int_temp = (int_I_pres_respiration - int_I_pres_surface)
heinrichsweikamp
parents:
diff changeset
1038 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF;
heinrichsweikamp
parents:
diff changeset
1039
heinrichsweikamp
parents:
diff changeset
1040 // Gas are selectable if we did not pass the change depth by more than 1.50m:
heinrichsweikamp
parents:
diff changeset
1041 for(g=0; g < NUM_GAS; ++g)
heinrichsweikamp
parents:
diff changeset
1042 {
heinrichsweikamp
parents:
diff changeset
1043 deco_gas_change[g] = 0;
heinrichsweikamp
parents:
diff changeset
1044 if(char_I_deco_gas_change[g])
heinrichsweikamp
parents:
diff changeset
1045 if( int_temp > 100 *(short)char_I_deco_gas_change[g] )
heinrichsweikamp
parents:
diff changeset
1046 deco_gas_change[g] = char_I_deco_gas_change[g];
heinrichsweikamp
parents:
diff changeset
1047 }
heinrichsweikamp
parents:
diff changeset
1048
heinrichsweikamp
parents:
diff changeset
1049 const_ppO2 = char_I_const_ppO2 * 0.01;
heinrichsweikamp
parents:
diff changeset
1050 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01;
heinrichsweikamp
parents:
diff changeset
1051 float_saturation_multiplier = char_I_saturation_multiplier * 0.01;
heinrichsweikamp
parents:
diff changeset
1052 GF_low = char_I_GF_Low_percentage * 0.01;
heinrichsweikamp
parents:
diff changeset
1053 GF_high = char_I_GF_High_percentage * 0.01;
heinrichsweikamp
parents:
diff changeset
1054 GF_delta = GF_high - GF_low;
heinrichsweikamp
parents:
diff changeset
1055 }
heinrichsweikamp
parents:
diff changeset
1056
heinrichsweikamp
parents:
diff changeset
1057 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1058 //
heinrichsweikamp
parents:
diff changeset
1059 //
heinrichsweikamp
parents:
diff changeset
1060 void calc_hauptroutine_update_tissues(void)
heinrichsweikamp
parents:
diff changeset
1061 {
heinrichsweikamp
parents:
diff changeset
1062 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 );
heinrichsweikamp
parents:
diff changeset
1063 assert( 0.00 <= He_ratio && He_ratio <= 1.00 );
heinrichsweikamp
parents:
diff changeset
1064 assert( (N2_ratio + He_ratio) <= 0.95 );
heinrichsweikamp
parents:
diff changeset
1065 assert( 0.800 < pres_respiration && pres_respiration < 14.0 );
heinrichsweikamp
parents:
diff changeset
1066
heinrichsweikamp
parents:
diff changeset
1067 pres_diluent = pres_respiration;
heinrichsweikamp
parents:
diff changeset
1068 if( char_I_const_ppO2 != 0 )
heinrichsweikamp
parents:
diff changeset
1069 {
heinrichsweikamp
parents:
diff changeset
1070 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio);
heinrichsweikamp
parents:
diff changeset
1071
heinrichsweikamp
parents:
diff changeset
1072 pres_diluent -= const_ppO2;
heinrichsweikamp
parents:
diff changeset
1073 pres_diluent /= N2_ratio + He_ratio;
heinrichsweikamp
parents:
diff changeset
1074 if( pres_diluent < 0.0 )
heinrichsweikamp
parents:
diff changeset
1075 pres_diluent = 0.0;
heinrichsweikamp
parents:
diff changeset
1076 if( pres_diluent > pres_respiration )
heinrichsweikamp
parents:
diff changeset
1077 pres_diluent = pres_respiration;
heinrichsweikamp
parents:
diff changeset
1078
heinrichsweikamp
parents:
diff changeset
1079 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5);
heinrichsweikamp
parents:
diff changeset
1080
heinrichsweikamp
parents:
diff changeset
1081 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55;
heinrichsweikamp
parents:
diff changeset
1082 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0;
heinrichsweikamp
parents:
diff changeset
1083 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5);
heinrichsweikamp
parents:
diff changeset
1084 }
heinrichsweikamp
parents:
diff changeset
1085
heinrichsweikamp
parents:
diff changeset
1086 if( pres_diluent > ppWater )
heinrichsweikamp
parents:
diff changeset
1087 {
heinrichsweikamp
parents:
diff changeset
1088 overlay float EAD, END;
heinrichsweikamp
parents:
diff changeset
1089
heinrichsweikamp
parents:
diff changeset
1090 ppN2 = N2_ratio * (pres_diluent - ppWater);
heinrichsweikamp
parents:
diff changeset
1091 ppHe = He_ratio * (pres_diluent - ppWater);
heinrichsweikamp
parents:
diff changeset
1092
heinrichsweikamp
parents:
diff changeset
1093 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level
heinrichsweikamp
parents:
diff changeset
1094 // with plain air.
heinrichsweikamp
parents:
diff changeset
1095 // ppN2 = 79% * (P_EAD - ppWater)
heinrichsweikamp
parents:
diff changeset
1096 // EAD = (P_EAD - Psurface) * 10
heinrichsweikamp
parents:
diff changeset
1097 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10
heinrichsweikamp
parents:
diff changeset
1098 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER;
heinrichsweikamp
parents:
diff changeset
1099 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0;
heinrichsweikamp
parents:
diff changeset
1100 char_O_EAD = (unsigned char)(EAD + 0.5);
heinrichsweikamp
parents:
diff changeset
1101
heinrichsweikamp
parents:
diff changeset
1102 // END : Equivalent Narcotic Dive.
heinrichsweikamp
parents:
diff changeset
1103 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of
heinrichsweikamp
parents:
diff changeset
1104 // 0.23 btw). Hence the formula becomes:
heinrichsweikamp
parents:
diff changeset
1105 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater
heinrichsweikamp
parents:
diff changeset
1106 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER
heinrichsweikamp
parents:
diff changeset
1107 //
heinrichsweikamp
parents:
diff changeset
1108 // Source cited:
heinrichsweikamp
parents:
diff changeset
1109 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott,
heinrichsweikamp
parents:
diff changeset
1110 // 4th edition, 1993, W.B.Saunders Company Ltd, London.
heinrichsweikamp
parents:
diff changeset
1111 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER;
heinrichsweikamp
parents:
diff changeset
1112 if( END < 0.0 || END > 245.5 ) END = 0.0;
heinrichsweikamp
parents:
diff changeset
1113 char_O_END = (unsigned char)(END + 0.5);
heinrichsweikamp
parents:
diff changeset
1114 }
heinrichsweikamp
parents:
diff changeset
1115 else // new in v.101
heinrichsweikamp
parents:
diff changeset
1116 {
heinrichsweikamp
parents:
diff changeset
1117 ppN2 = 0.0;
heinrichsweikamp
parents:
diff changeset
1118 ppHe = 0.0;
heinrichsweikamp
parents:
diff changeset
1119 char_O_EAD = char_O_END = 0;
heinrichsweikamp
parents:
diff changeset
1120 }
heinrichsweikamp
parents:
diff changeset
1121
heinrichsweikamp
parents:
diff changeset
1122 if(!char_I_step_is_1min)
heinrichsweikamp
parents:
diff changeset
1123 calc_tissue(0);
heinrichsweikamp
parents:
diff changeset
1124 else
heinrichsweikamp
parents:
diff changeset
1125 calc_tissue(1);
heinrichsweikamp
parents:
diff changeset
1126
heinrichsweikamp
parents:
diff changeset
1127 // Calc limit for surface, ie. GF_high.
heinrichsweikamp
parents:
diff changeset
1128 calc_limit();
heinrichsweikamp
parents:
diff changeset
1129
heinrichsweikamp
parents:
diff changeset
1130 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000);
heinrichsweikamp
parents:
diff changeset
1131 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000);
heinrichsweikamp
parents:
diff changeset
1132 }
heinrichsweikamp
parents:
diff changeset
1133
heinrichsweikamp
parents:
diff changeset
1134
heinrichsweikamp
parents:
diff changeset
1135 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1136 // Compute stops.
heinrichsweikamp
parents:
diff changeset
1137 //
heinrichsweikamp
parents:
diff changeset
1138 // Note: because this can be very long, break on 16 iterations, and set state
heinrichsweikamp
parents:
diff changeset
1139 // to 0 when finished, or to 1 when needing to continue.
heinrichsweikamp
parents:
diff changeset
1140 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta),
heinrichsweikamp
parents:
diff changeset
1141 // break the loop when total time > 512msec.
heinrichsweikamp
parents:
diff changeset
1142 //
heinrichsweikamp
parents:
diff changeset
1143 void calc_hauptroutine_calc_deco(void)
heinrichsweikamp
parents:
diff changeset
1144 {
heinrichsweikamp
parents:
diff changeset
1145 overlay unsigned char loop;
heinrichsweikamp
parents:
diff changeset
1146
34
d7e6dfd5b498 small cleanup
heinrichsweikamp
parents: 33
diff changeset
1147 for(loop = 0; loop < 16; ++loop)
0
heinrichsweikamp
parents:
diff changeset
1148 {
heinrichsweikamp
parents:
diff changeset
1149 // Limit loops to 512ms, using timer 5:
heinrichsweikamp
parents:
diff changeset
1150 if( tmr5() & (512*32) )
heinrichsweikamp
parents:
diff changeset
1151 break;
34
d7e6dfd5b498 small cleanup
heinrichsweikamp
parents: 33
diff changeset
1152
0
heinrichsweikamp
parents:
diff changeset
1153 if( calc_nextdecodepth() )
heinrichsweikamp
parents:
diff changeset
1154 {
heinrichsweikamp
parents:
diff changeset
1155 if( temp_depth_limit == 0 )
heinrichsweikamp
parents:
diff changeset
1156 goto Surface;
heinrichsweikamp
parents:
diff changeset
1157
heinrichsweikamp
parents:
diff changeset
1158 //---- We hit a stop at temp_depth_limit ---------------------
heinrichsweikamp
parents:
diff changeset
1159 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar,
heinrichsweikamp
parents:
diff changeset
1160 + pres_surface; // To absolute.
heinrichsweikamp
parents:
diff changeset
1161 if( !update_deco_table() ) // Adds a one minute stops.
heinrichsweikamp
parents:
diff changeset
1162 goto Surface; // Deco table full: abort...
heinrichsweikamp
parents:
diff changeset
1163 }
heinrichsweikamp
parents:
diff changeset
1164 else
heinrichsweikamp
parents:
diff changeset
1165 {
heinrichsweikamp
parents:
diff changeset
1166 //---- No stop -----------------------------------------------
heinrichsweikamp
parents:
diff changeset
1167 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait.
heinrichsweikamp
parents:
diff changeset
1168
heinrichsweikamp
parents:
diff changeset
1169 //---- Finish computations once surface is reached -----------
heinrichsweikamp
parents:
diff changeset
1170 if( temp_deco <= pres_surface )
heinrichsweikamp
parents:
diff changeset
1171 {
heinrichsweikamp
parents:
diff changeset
1172 Surface:
heinrichsweikamp
parents:
diff changeset
1173 if( char_O_deco_status == 1 ) // Don't in @+5min variant.
heinrichsweikamp
parents:
diff changeset
1174 copy_deco_table();
heinrichsweikamp
parents:
diff changeset
1175
heinrichsweikamp
parents:
diff changeset
1176 calc_ascenttime();
heinrichsweikamp
parents:
diff changeset
1177 char_O_deco_status = 0; // calc nullzeit next time.
heinrichsweikamp
parents:
diff changeset
1178 char_O_deco_last_stop = 0; // Surface reached (to animate menu)
heinrichsweikamp
parents:
diff changeset
1179 return;
heinrichsweikamp
parents:
diff changeset
1180 }
heinrichsweikamp
parents:
diff changeset
1181 }
heinrichsweikamp
parents:
diff changeset
1182 //---- Then update tissue --------------------------------------------
heinrichsweikamp
parents:
diff changeset
1183 sim_dive_mins++; // Advance simulated time by 1 minute.
heinrichsweikamp
parents:
diff changeset
1184 gas_switch_set(); // Apply any simulated gas change, once validated.
heinrichsweikamp
parents:
diff changeset
1185 sim_alveolar_presures(); // Updates ppN2 and ppHe.
heinrichsweikamp
parents:
diff changeset
1186 sim_tissue(1); // Simulate compartiments for 1 minute.
heinrichsweikamp
parents:
diff changeset
1187 }
heinrichsweikamp
parents:
diff changeset
1188
heinrichsweikamp
parents:
diff changeset
1189 // Surface not reached, need more stops... for menu animation.
heinrichsweikamp
parents:
diff changeset
1190 char_O_deco_last_stop = temp_depth_limit; // Reached depth.
heinrichsweikamp
parents:
diff changeset
1191 }
heinrichsweikamp
parents:
diff changeset
1192
heinrichsweikamp
parents:
diff changeset
1193
heinrichsweikamp
parents:
diff changeset
1194 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1195 // Simulation ascention to first deco stop.
heinrichsweikamp
parents:
diff changeset
1196 //
heinrichsweikamp
parents:
diff changeset
1197 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn),
heinrichsweikamp
parents:
diff changeset
1198 // there is no need to break on more that 16 iterations
heinrichsweikamp
parents:
diff changeset
1199 // (or we are already in deep shit).
heinrichsweikamp
parents:
diff changeset
1200 //
heinrichsweikamp
parents:
diff changeset
1201 // Input: pres_respiration
heinrichsweikamp
parents:
diff changeset
1202 // Output: temp_deco
heinrichsweikamp
parents:
diff changeset
1203 //
heinrichsweikamp
parents:
diff changeset
1204 // if char_O_deco_status indicate @+5 variant, add extra time at current depth,
heinrichsweikamp
parents:
diff changeset
1205 // before ascent.
heinrichsweikamp
parents:
diff changeset
1206 void sim_ascent_to_first_stop(void)
heinrichsweikamp
parents:
diff changeset
1207 {
heinrichsweikamp
parents:
diff changeset
1208 overlay unsigned char fast = 1; // 1min or 2sec steps.
heinrichsweikamp
parents:
diff changeset
1209
heinrichsweikamp
parents:
diff changeset
1210 update_startvalues();
heinrichsweikamp
parents:
diff changeset
1211 clear_deco_table();
heinrichsweikamp
parents:
diff changeset
1212
heinrichsweikamp
parents:
diff changeset
1213 temp_deco = pres_respiration; // Starts from current real depth.
heinrichsweikamp
parents:
diff changeset
1214
heinrichsweikamp
parents:
diff changeset
1215 // Are we doing the special @+5min variation ?
heinrichsweikamp
parents:
diff changeset
1216 if(char_O_deco_status & 4)
heinrichsweikamp
parents:
diff changeset
1217 sim_extra_time();
heinrichsweikamp
parents:
diff changeset
1218
heinrichsweikamp
parents:
diff changeset
1219 //---- Loop until first stop, gas switch, or surface is reached ----------
heinrichsweikamp
parents:
diff changeset
1220 for(;;)
heinrichsweikamp
parents:
diff changeset
1221 {
heinrichsweikamp
parents:
diff changeset
1222 overlay float old_deco = temp_deco; // Pamb backup (bars)
heinrichsweikamp
parents:
diff changeset
1223
heinrichsweikamp
parents:
diff changeset
1224 // Try ascending 1 full minute (fast) or 2sec (!fast):
heinrichsweikamp
parents:
diff changeset
1225 if( fast )
heinrichsweikamp
parents:
diff changeset
1226 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar.
heinrichsweikamp
parents:
diff changeset
1227 else
heinrichsweikamp
parents:
diff changeset
1228 temp_deco -= (10.0/30.0)*METER_TO_BAR; // 2sec at 10m/min.
heinrichsweikamp
parents:
diff changeset
1229
heinrichsweikamp
parents:
diff changeset
1230 if( temp_deco < pres_surface ) // But don't go over surface.
heinrichsweikamp
parents:
diff changeset
1231 temp_deco = pres_surface;
heinrichsweikamp
parents:
diff changeset
1232
heinrichsweikamp
parents:
diff changeset
1233 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because
heinrichsweikamp
parents:
diff changeset
1234 // one minute passed.
heinrichsweikamp
parents:
diff changeset
1235 sim_limit(GF_low);
heinrichsweikamp
parents:
diff changeset
1236
heinrichsweikamp
parents:
diff changeset
1237 // Did we reach deepest remaining stop ?
heinrichsweikamp
parents:
diff changeset
1238 if( temp_deco < sim_lead_tissue_limit )
heinrichsweikamp
parents:
diff changeset
1239 {
heinrichsweikamp
parents:
diff changeset
1240 temp_deco = old_deco; // Restore last correct depth,
heinrichsweikamp
parents:
diff changeset
1241
heinrichsweikamp
parents:
diff changeset
1242 if( fast )
heinrichsweikamp
parents:
diff changeset
1243 {
heinrichsweikamp
parents:
diff changeset
1244 fast = 0; // Retry with 2sec steps.
heinrichsweikamp
parents:
diff changeset
1245 continue;
heinrichsweikamp
parents:
diff changeset
1246 }
heinrichsweikamp
parents:
diff changeset
1247 else
heinrichsweikamp
parents:
diff changeset
1248 break; // Done...
heinrichsweikamp
parents:
diff changeset
1249 }
heinrichsweikamp
parents:
diff changeset
1250
heinrichsweikamp
parents:
diff changeset
1251 // Did we reach surface ?
heinrichsweikamp
parents:
diff changeset
1252 // NOTE: we should round BEFORE checking surface is reached.
heinrichsweikamp
parents:
diff changeset
1253 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER);
heinrichsweikamp
parents:
diff changeset
1254 if( temp_depth_limit == 0 )
heinrichsweikamp
parents:
diff changeset
1255 {
heinrichsweikamp
parents:
diff changeset
1256 temp_deco = pres_surface; // Yes: finished !
heinrichsweikamp
parents:
diff changeset
1257 break;
heinrichsweikamp
parents:
diff changeset
1258 }
heinrichsweikamp
parents:
diff changeset
1259
heinrichsweikamp
parents:
diff changeset
1260 // Check for gas change below new depth ?
heinrichsweikamp
parents:
diff changeset
1261 if( gas_switch_deepest() )
heinrichsweikamp
parents:
diff changeset
1262 {
heinrichsweikamp
parents:
diff changeset
1263 assert( temp_depth_limit > 0);
heinrichsweikamp
parents:
diff changeset
1264
heinrichsweikamp
parents:
diff changeset
1265 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface;
heinrichsweikamp
parents:
diff changeset
1266 break;
heinrichsweikamp
parents:
diff changeset
1267 }
heinrichsweikamp
parents:
diff changeset
1268
heinrichsweikamp
parents:
diff changeset
1269 if( fast )
heinrichsweikamp
parents:
diff changeset
1270 sim_dive_mins++; // Advance simulated time by 1 minute.
heinrichsweikamp
parents:
diff changeset
1271 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe
heinrichsweikamp
parents:
diff changeset
1272 sim_tissue(fast); // and update tissues for 1 min.
heinrichsweikamp
parents:
diff changeset
1273 }
heinrichsweikamp
parents:
diff changeset
1274 }
heinrichsweikamp
parents:
diff changeset
1275
heinrichsweikamp
parents:
diff changeset
1276 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1277 // Simulation extra time at the current depth.
heinrichsweikamp
parents:
diff changeset
1278 //
heinrichsweikamp
parents:
diff changeset
1279 // This routine is used for @+5min feature.
heinrichsweikamp
parents:
diff changeset
1280 void sim_extra_time(void)
heinrichsweikamp
parents:
diff changeset
1281 {
heinrichsweikamp
parents:
diff changeset
1282 overlay unsigned char extra = char_I_extra_time;
heinrichsweikamp
parents:
diff changeset
1283 do {
heinrichsweikamp
parents:
diff changeset
1284 sim_dive_mins++; // Advance simulated time by 1 minute.
heinrichsweikamp
parents:
diff changeset
1285 sim_tissue(1); // and update tissues for 1 min.
heinrichsweikamp
parents:
diff changeset
1286 } while( --extra != 0 );
heinrichsweikamp
parents:
diff changeset
1287 }
heinrichsweikamp
parents:
diff changeset
1288
heinrichsweikamp
parents:
diff changeset
1289 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1290 // calc_tissue
heinrichsweikamp
parents:
diff changeset
1291 //
heinrichsweikamp
parents:
diff changeset
1292 // optimized in v.101
heinrichsweikamp
parents:
diff changeset
1293 //
heinrichsweikamp
parents:
diff changeset
1294 static void calc_tissue(PARAMETER unsigned char period)
heinrichsweikamp
parents:
diff changeset
1295 {
heinrichsweikamp
parents:
diff changeset
1296 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m
heinrichsweikamp
parents:
diff changeset
1297 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m
heinrichsweikamp
parents:
diff changeset
1298
heinrichsweikamp
parents:
diff changeset
1299 for (ci=0;ci<NUM_COMP;ci++)
heinrichsweikamp
parents:
diff changeset
1300 {
heinrichsweikamp
parents:
diff changeset
1301 read_buhlmann_times(period); // 2 sec or 1 min period.
heinrichsweikamp
parents:
diff changeset
1302
heinrichsweikamp
parents:
diff changeset
1303 // N2
heinrichsweikamp
parents:
diff changeset
1304 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e;
heinrichsweikamp
parents:
diff changeset
1305 temp_tissue_safety();
heinrichsweikamp
parents:
diff changeset
1306 pres_tissue_N2[ci] += temp_tissue;
heinrichsweikamp
parents:
diff changeset
1307
heinrichsweikamp
parents:
diff changeset
1308 // He
heinrichsweikamp
parents:
diff changeset
1309 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e;
heinrichsweikamp
parents:
diff changeset
1310 temp_tissue_safety();
heinrichsweikamp
parents:
diff changeset
1311 pres_tissue_He[ci] += temp_tissue;
heinrichsweikamp
parents:
diff changeset
1312 }
heinrichsweikamp
parents:
diff changeset
1313 }
heinrichsweikamp
parents:
diff changeset
1314
heinrichsweikamp
parents:
diff changeset
1315 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1316 // calc_limit
heinrichsweikamp
parents:
diff changeset
1317 //
heinrichsweikamp
parents:
diff changeset
1318 // New in v.111 : separated from calc_tissue(), and depends on GF value.
heinrichsweikamp
parents:
diff changeset
1319 //
heinrichsweikamp
parents:
diff changeset
1320 static void calc_limit(void)
heinrichsweikamp
parents:
diff changeset
1321 {
heinrichsweikamp
parents:
diff changeset
1322 char_O_gtissue_no = 255;
heinrichsweikamp
parents:
diff changeset
1323 calc_lead_tissue_limit = 0.0;
heinrichsweikamp
parents:
diff changeset
1324
heinrichsweikamp
parents:
diff changeset
1325 for(ci=0; ci<NUM_COMP;ci++)
heinrichsweikamp
parents:
diff changeset
1326 {
heinrichsweikamp
parents:
diff changeset
1327 overlay float N2 = pres_tissue_N2[ci];
heinrichsweikamp
parents:
diff changeset
1328 overlay float He = pres_tissue_He[ci];
heinrichsweikamp
parents:
diff changeset
1329 overlay float p = N2 + He;
heinrichsweikamp
parents:
diff changeset
1330
heinrichsweikamp
parents:
diff changeset
1331 read_buhlmann_coefficients();
heinrichsweikamp
parents:
diff changeset
1332 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p;
heinrichsweikamp
parents:
diff changeset
1333 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p;
heinrichsweikamp
parents:
diff changeset
1334
heinrichsweikamp
parents:
diff changeset
1335 // Apply the Eric Baker's varying gradient factor correction.
heinrichsweikamp
parents:
diff changeset
1336 // Note: the correction factor depends both on GF and b,
heinrichsweikamp
parents:
diff changeset
1337 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%),
heinrichsweikamp
parents:
diff changeset
1338 // so that can change who is the leading gas...
heinrichsweikamp
parents:
diff changeset
1339 // Note: Also depends of the GF. So the calcul is different for
heinrichsweikamp
parents:
diff changeset
1340 // GF_low, current GF, or GF_high...
heinrichsweikamp
parents:
diff changeset
1341 // *BUT* calc_tissue() is used to compute bottom time,
heinrichsweikamp
parents:
diff changeset
1342 // hence what would happend at surface,
heinrichsweikamp
parents:
diff changeset
1343 // hence at GF_high.
heinrichsweikamp
parents:
diff changeset
1344 if( char_I_deco_model != 0 )
heinrichsweikamp
parents:
diff changeset
1345 p = ( p - var_N2_a * GF_high) * var_N2_b
heinrichsweikamp
parents:
diff changeset
1346 / (GF_high + var_N2_b * (1.0 - GF_high));
heinrichsweikamp
parents:
diff changeset
1347 else
heinrichsweikamp
parents:
diff changeset
1348 p = (p - var_N2_a) * var_N2_b;
heinrichsweikamp
parents:
diff changeset
1349 if( p < 0.0 ) p = 0.0;
heinrichsweikamp
parents:
diff changeset
1350
heinrichsweikamp
parents:
diff changeset
1351 if( p > calc_lead_tissue_limit )
heinrichsweikamp
parents:
diff changeset
1352 {
heinrichsweikamp
parents:
diff changeset
1353 char_O_gtissue_no = ci;
heinrichsweikamp
parents:
diff changeset
1354 calc_lead_tissue_limit = p;
heinrichsweikamp
parents:
diff changeset
1355 }
heinrichsweikamp
parents:
diff changeset
1356 }
heinrichsweikamp
parents:
diff changeset
1357
heinrichsweikamp
parents:
diff changeset
1358 assert( char_O_gtissue_no < NUM_COMP );
heinrichsweikamp
parents:
diff changeset
1359 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0);
heinrichsweikamp
parents:
diff changeset
1360 }
heinrichsweikamp
parents:
diff changeset
1361
heinrichsweikamp
parents:
diff changeset
1362 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1363 // calc_nullzeit
heinrichsweikamp
parents:
diff changeset
1364 //
heinrichsweikamp
parents:
diff changeset
1365 // calculates the remaining bottom time
heinrichsweikamp
parents:
diff changeset
1366 //
heinrichsweikamp
parents:
diff changeset
1367 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second
heinrichsweikamp
parents:
diff changeset
1368 // exponential term to the M-value equation, making it impossible to
heinrichsweikamp
parents:
diff changeset
1369 // invert... So we have to make a fast-simu until we find a better way.
heinrichsweikamp
parents:
diff changeset
1370 //
heinrichsweikamp
parents:
diff changeset
1371 // Input: pres_respiration
heinrichsweikamp
parents:
diff changeset
1372 // Output: char_O_nullzeit
heinrichsweikamp
parents:
diff changeset
1373 //
heinrichsweikamp
parents:
diff changeset
1374 static void calc_nullzeit(void)
heinrichsweikamp
parents:
diff changeset
1375 {
heinrichsweikamp
parents:
diff changeset
1376 //---- Compute ppN2 and ppHe ---------------------------------------------
heinrichsweikamp
parents:
diff changeset
1377 temp_deco = pres_respiration;
heinrichsweikamp
parents:
diff changeset
1378 sim_alveolar_presures();
heinrichsweikamp
parents:
diff changeset
1379
heinrichsweikamp
parents:
diff changeset
1380 char_O_nullzeit = 240;
heinrichsweikamp
parents:
diff changeset
1381 for(ci=0; ci<NUM_COMP; ci++)
heinrichsweikamp
parents:
diff changeset
1382 {
heinrichsweikamp
parents:
diff changeset
1383 //---- Read A/B values and loading factor for N2 and He --------------
heinrichsweikamp
parents:
diff changeset
1384 overlay float tN2 = pres_tissue_N2[ci];
heinrichsweikamp
parents:
diff changeset
1385 overlay float tHe = pres_tissue_He[ci];
heinrichsweikamp
parents:
diff changeset
1386 overlay float t = tN2 + tHe;
heinrichsweikamp
parents:
diff changeset
1387 overlay unsigned char ndl;
heinrichsweikamp
parents:
diff changeset
1388 overlay unsigned char period = 10;
heinrichsweikamp
parents:
diff changeset
1389
heinrichsweikamp
parents:
diff changeset
1390 read_buhlmann_coefficients();
heinrichsweikamp
parents:
diff changeset
1391 read_buhlmann_times(2); // Starts with a 10min period.
heinrichsweikamp
parents:
diff changeset
1392
heinrichsweikamp
parents:
diff changeset
1393 //---- Simulate for that tissue --------------------------------------
heinrichsweikamp
parents:
diff changeset
1394 // NOTE: No need to simulate for longuer than the already found NDL.
heinrichsweikamp
parents:
diff changeset
1395 for(ndl=0; ndl<char_O_nullzeit;)
heinrichsweikamp
parents:
diff changeset
1396 {
heinrichsweikamp
parents:
diff changeset
1397 //---- Compute updated mix M-value at surface
heinrichsweikamp
parents:
diff changeset
1398 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t;
heinrichsweikamp
parents:
diff changeset
1399 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t;
heinrichsweikamp
parents:
diff changeset
1400 overlay float M0 = (a + pres_surface/b);
heinrichsweikamp
parents:
diff changeset
1401
heinrichsweikamp
parents:
diff changeset
1402 //---- Add 10min/1min to N2/He tissues
heinrichsweikamp
parents:
diff changeset
1403 overlay float dTN2 = (ppN2 - tN2) * var_N2_e;
heinrichsweikamp
parents:
diff changeset
1404 overlay float dTHe = (ppHe - tHe) * var_He_e;
heinrichsweikamp
parents:
diff changeset
1405
heinrichsweikamp
parents:
diff changeset
1406 //---- Apply security margin when using the non-GF model
heinrichsweikamp
parents:
diff changeset
1407 if( char_I_deco_model == 0 )
heinrichsweikamp
parents:
diff changeset
1408 {
heinrichsweikamp
parents:
diff changeset
1409 dTN2 *= float_saturation_multiplier;
heinrichsweikamp
parents:
diff changeset
1410 dTHe *= float_saturation_multiplier;
heinrichsweikamp
parents:
diff changeset
1411 }
heinrichsweikamp
parents:
diff changeset
1412 else // Or GF-based model
heinrichsweikamp
parents:
diff changeset
1413 M0 = GF_high * (M0 - pres_surface) + pres_surface;
heinrichsweikamp
parents:
diff changeset
1414
heinrichsweikamp
parents:
diff changeset
1415 //---- Simulate off-gasing while going to surface
heinrichsweikamp
parents:
diff changeset
1416 // TODO !
heinrichsweikamp
parents:
diff changeset
1417 // dTN2 -= exp( ... ascent time ... ppN2...)
heinrichsweikamp
parents:
diff changeset
1418 // dTHe -= exp( ... ascent time ... ppHe...)
heinrichsweikamp
parents:
diff changeset
1419
heinrichsweikamp
parents:
diff changeset
1420 //---- Ok now, and still ok to surface after 1 or 10 minutes ?
heinrichsweikamp
parents:
diff changeset
1421 if( (t <= M0) && (t + dTN2 + dTHe <= M0) )
heinrichsweikamp
parents:
diff changeset
1422 {
heinrichsweikamp
parents:
diff changeset
1423 tN2 += dTN2; // YES: apply gas loadings,
heinrichsweikamp
parents:
diff changeset
1424 tHe += dTHe;
heinrichsweikamp
parents:
diff changeset
1425 t = tN2 + tHe;
heinrichsweikamp
parents:
diff changeset
1426 ndl += period; // increment NDL,
heinrichsweikamp
parents:
diff changeset
1427 continue; // and loop.
heinrichsweikamp
parents:
diff changeset
1428 }
heinrichsweikamp
parents:
diff changeset
1429
heinrichsweikamp
parents:
diff changeset
1430 //---- Should we retry with smaller steps ?
heinrichsweikamp
parents:
diff changeset
1431 if( period == 10 )
heinrichsweikamp
parents:
diff changeset
1432 {
heinrichsweikamp
parents:
diff changeset
1433 read_buhlmann_times(1); // 1min coefs.
heinrichsweikamp
parents:
diff changeset
1434 period = 1;
heinrichsweikamp
parents:
diff changeset
1435 continue;
heinrichsweikamp
parents:
diff changeset
1436 }
heinrichsweikamp
parents:
diff changeset
1437
heinrichsweikamp
parents:
diff changeset
1438 //---- ELSE make a linear approx for the last minute
heinrichsweikamp
parents:
diff changeset
1439 // Usefull to have a meaningfull rounding of NDL.
heinrichsweikamp
parents:
diff changeset
1440 // But ONLY it positive (negativ casted to unsigned is bad).
heinrichsweikamp
parents:
diff changeset
1441 if( M0 > t )
heinrichsweikamp
parents:
diff changeset
1442 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe));
heinrichsweikamp
parents:
diff changeset
1443 break;
heinrichsweikamp
parents:
diff changeset
1444 }
heinrichsweikamp
parents:
diff changeset
1445
heinrichsweikamp
parents:
diff changeset
1446 // Keep the shortest NDL found
heinrichsweikamp
parents:
diff changeset
1447 if( ndl < char_O_nullzeit )
heinrichsweikamp
parents:
diff changeset
1448 char_O_nullzeit = ndl;
heinrichsweikamp
parents:
diff changeset
1449 }
heinrichsweikamp
parents:
diff changeset
1450 }
heinrichsweikamp
parents:
diff changeset
1451
heinrichsweikamp
parents:
diff changeset
1452 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1453 // calc_ascenttime
heinrichsweikamp
parents:
diff changeset
1454 //
heinrichsweikamp
parents:
diff changeset
1455 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters,
heinrichsweikamp
parents:
diff changeset
1456 // and all stops.
heinrichsweikamp
parents:
diff changeset
1457 //
heinrichsweikamp
parents:
diff changeset
1458 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant.
heinrichsweikamp
parents:
diff changeset
1459 static void calc_ascenttime(void)
heinrichsweikamp
parents:
diff changeset
1460 {
heinrichsweikamp
parents:
diff changeset
1461 overlay unsigned char x;
heinrichsweikamp
parents:
diff changeset
1462 overlay unsigned short sum;
heinrichsweikamp
parents:
diff changeset
1463
heinrichsweikamp
parents:
diff changeset
1464 // + 0.7 to count 1 minute ascent time from 3 metre to surface
heinrichsweikamp
parents:
diff changeset
1465 overlay float ascent = pres_respiration - pres_surface + 0.7;
heinrichsweikamp
parents:
diff changeset
1466 if (ascent < 0.0)
heinrichsweikamp
parents:
diff changeset
1467 ascent = 0.0;
heinrichsweikamp
parents:
diff changeset
1468 sum = (unsigned short)(ascent + 0.99);
heinrichsweikamp
parents:
diff changeset
1469
heinrichsweikamp
parents:
diff changeset
1470 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++)
heinrichsweikamp
parents:
diff changeset
1471 sum += (unsigned short)internal_deco_time[x];
heinrichsweikamp
parents:
diff changeset
1472
heinrichsweikamp
parents:
diff changeset
1473 if( char_O_deco_status == 1 )
heinrichsweikamp
parents:
diff changeset
1474 int_O_ascenttime = sum;
heinrichsweikamp
parents:
diff changeset
1475 else
heinrichsweikamp
parents:
diff changeset
1476 int_O_extra_ascenttime = sum;
heinrichsweikamp
parents:
diff changeset
1477
heinrichsweikamp
parents:
diff changeset
1478 if(int_O_ascenttime>999)
heinrichsweikamp
parents:
diff changeset
1479 int_O_ascenttime=999; // limit to 999'
heinrichsweikamp
parents:
diff changeset
1480 }
heinrichsweikamp
parents:
diff changeset
1481
heinrichsweikamp
parents:
diff changeset
1482 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1483 // update_startvalues
heinrichsweikamp
parents:
diff changeset
1484 //
heinrichsweikamp
parents:
diff changeset
1485 // updated in v.102
heinrichsweikamp
parents:
diff changeset
1486 //
heinrichsweikamp
parents:
diff changeset
1487 void update_startvalues(void)
heinrichsweikamp
parents:
diff changeset
1488 {
heinrichsweikamp
parents:
diff changeset
1489 overlay unsigned char x;
heinrichsweikamp
parents:
diff changeset
1490
heinrichsweikamp
parents:
diff changeset
1491 // Start ascent simulation with current tissue partial pressures.
heinrichsweikamp
parents:
diff changeset
1492 for(x=0; x<NUM_COMP; x++)
heinrichsweikamp
parents:
diff changeset
1493 {
heinrichsweikamp
parents:
diff changeset
1494 sim_pres_tissue_N2[x] = pres_tissue_N2[x];
heinrichsweikamp
parents:
diff changeset
1495 sim_pres_tissue_He[x] = pres_tissue_He[x];
heinrichsweikamp
parents:
diff changeset
1496 }
heinrichsweikamp
parents:
diff changeset
1497
heinrichsweikamp
parents:
diff changeset
1498 // No leading tissue (yet) for this ascent simulation.
heinrichsweikamp
parents:
diff changeset
1499 sim_lead_tissue_limit = 0.0;
heinrichsweikamp
parents:
diff changeset
1500 sim_lead_tissue_no = 255;
heinrichsweikamp
parents:
diff changeset
1501 }
heinrichsweikamp
parents:
diff changeset
1502
heinrichsweikamp
parents:
diff changeset
1503 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1504 // sim_tissue
heinrichsweikamp
parents:
diff changeset
1505 //
heinrichsweikamp
parents:
diff changeset
1506 // optimized in v.101
heinrichsweikamp
parents:
diff changeset
1507 //
heinrichsweikamp
parents:
diff changeset
1508 // Function very simular to calc_tissue, but:
heinrichsweikamp
parents:
diff changeset
1509 // + Use a 1min or 10min period.
heinrichsweikamp
parents:
diff changeset
1510 // + Do it on sim_pres_tissue, instead of pres_tissue.
heinrichsweikamp
parents:
diff changeset
1511 static void sim_tissue(PARAMETER unsigned char period)
heinrichsweikamp
parents:
diff changeset
1512 {
heinrichsweikamp
parents:
diff changeset
1513 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m
heinrichsweikamp
parents:
diff changeset
1514 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m
heinrichsweikamp
parents:
diff changeset
1515
heinrichsweikamp
parents:
diff changeset
1516 for(ci=0; ci<NUM_COMP; ci++)
heinrichsweikamp
parents:
diff changeset
1517 {
heinrichsweikamp
parents:
diff changeset
1518 read_buhlmann_times(period); // 1 or 10 minute(s) interval
heinrichsweikamp
parents:
diff changeset
1519
heinrichsweikamp
parents:
diff changeset
1520 // N2
heinrichsweikamp
parents:
diff changeset
1521 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e;
heinrichsweikamp
parents:
diff changeset
1522 temp_tissue_safety();
heinrichsweikamp
parents:
diff changeset
1523 sim_pres_tissue_N2[ci] += temp_tissue;
heinrichsweikamp
parents:
diff changeset
1524
heinrichsweikamp
parents:
diff changeset
1525 // He
heinrichsweikamp
parents:
diff changeset
1526 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e;
heinrichsweikamp
parents:
diff changeset
1527 temp_tissue_safety();
heinrichsweikamp
parents:
diff changeset
1528 sim_pres_tissue_He[ci] += temp_tissue;
heinrichsweikamp
parents:
diff changeset
1529 }
heinrichsweikamp
parents:
diff changeset
1530 }
heinrichsweikamp
parents:
diff changeset
1531
heinrichsweikamp
parents:
diff changeset
1532 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1533 // sim_limit()
heinrichsweikamp
parents:
diff changeset
1534 //
heinrichsweikamp
parents:
diff changeset
1535 // New in v.111
heinrichsweikamp
parents:
diff changeset
1536 //
heinrichsweikamp
parents:
diff changeset
1537 // Function separated from sim_tissue() to allow recomputing limit on
heinrichsweikamp
parents:
diff changeset
1538 // different depth, because it depends on current gradient factor.
heinrichsweikamp
parents:
diff changeset
1539 //
heinrichsweikamp
parents:
diff changeset
1540 static void sim_limit(PARAMETER float GF_current)
heinrichsweikamp
parents:
diff changeset
1541 {
heinrichsweikamp
parents:
diff changeset
1542 assert( 0.0 < GF_current && GF_current <= 1.0f);
heinrichsweikamp
parents:
diff changeset
1543
heinrichsweikamp
parents:
diff changeset
1544 sim_lead_tissue_limit = 0.0;
heinrichsweikamp
parents:
diff changeset
1545 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue.
heinrichsweikamp
parents:
diff changeset
1546
heinrichsweikamp
parents:
diff changeset
1547 for(ci=0; ci<NUM_COMP; ci++)
heinrichsweikamp
parents:
diff changeset
1548 {
heinrichsweikamp
parents:
diff changeset
1549 overlay float N2 = sim_pres_tissue_N2[ci];
heinrichsweikamp
parents:
diff changeset
1550 overlay float He = sim_pres_tissue_He[ci];
heinrichsweikamp
parents:
diff changeset
1551 overlay float p = N2 + He;
heinrichsweikamp
parents:
diff changeset
1552
heinrichsweikamp
parents:
diff changeset
1553 read_buhlmann_coefficients();
heinrichsweikamp
parents:
diff changeset
1554 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p;
heinrichsweikamp
parents:
diff changeset
1555 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p;
heinrichsweikamp
parents:
diff changeset
1556
heinrichsweikamp
parents:
diff changeset
1557 // Apply the Eric Baker's varying gradient factor correction.
heinrichsweikamp
parents:
diff changeset
1558 // Note: the correction factor depends both on GF and b,
heinrichsweikamp
parents:
diff changeset
1559 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%),
heinrichsweikamp
parents:
diff changeset
1560 // so that can change who is the leading gas...
heinrichsweikamp
parents:
diff changeset
1561 // Note: Also depends of the GF_current...
heinrichsweikamp
parents:
diff changeset
1562 if( char_I_deco_model != 0 )
heinrichsweikamp
parents:
diff changeset
1563 p = ( p - var_N2_a * GF_current)
heinrichsweikamp
parents:
diff changeset
1564 / (GF_current / var_N2_b + 1.0 - GF_current);
heinrichsweikamp
parents:
diff changeset
1565 else
heinrichsweikamp
parents:
diff changeset
1566 p = (p - var_N2_a) * var_N2_b;
heinrichsweikamp
parents:
diff changeset
1567 if( p < 0.0 ) p = 0.0;
heinrichsweikamp
parents:
diff changeset
1568
heinrichsweikamp
parents:
diff changeset
1569 if( p > sim_lead_tissue_limit )
heinrichsweikamp
parents:
diff changeset
1570 {
heinrichsweikamp
parents:
diff changeset
1571 sim_lead_tissue_no = ci;
heinrichsweikamp
parents:
diff changeset
1572 sim_lead_tissue_limit = p;
heinrichsweikamp
parents:
diff changeset
1573 }
heinrichsweikamp
parents:
diff changeset
1574 } // for ci
heinrichsweikamp
parents:
diff changeset
1575
heinrichsweikamp
parents:
diff changeset
1576 assert( sim_lead_tissue_no < NUM_COMP );
heinrichsweikamp
parents:
diff changeset
1577 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 );
heinrichsweikamp
parents:
diff changeset
1578 }
heinrichsweikamp
parents:
diff changeset
1579
heinrichsweikamp
parents:
diff changeset
1580 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1581 // clear_deco_table
heinrichsweikamp
parents:
diff changeset
1582 //
heinrichsweikamp
parents:
diff changeset
1583 // unchanged in v.101
heinrichsweikamp
parents:
diff changeset
1584 //
heinrichsweikamp
parents:
diff changeset
1585 static void clear_deco_table(void)
heinrichsweikamp
parents:
diff changeset
1586 {
heinrichsweikamp
parents:
diff changeset
1587 overlay unsigned char x;
heinrichsweikamp
parents:
diff changeset
1588
heinrichsweikamp
parents:
diff changeset
1589 for(x=0; x<NUM_STOPS; ++x)
heinrichsweikamp
parents:
diff changeset
1590 {
heinrichsweikamp
parents:
diff changeset
1591 internal_deco_time [x] = 0;
heinrichsweikamp
parents:
diff changeset
1592 internal_deco_depth[x] = 0;
heinrichsweikamp
parents:
diff changeset
1593 }
heinrichsweikamp
parents:
diff changeset
1594 }
heinrichsweikamp
parents:
diff changeset
1595
heinrichsweikamp
parents:
diff changeset
1596 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1597 // update_deco_table
heinrichsweikamp
parents:
diff changeset
1598 //
heinrichsweikamp
parents:
diff changeset
1599 // Add 1 min to current stop.
heinrichsweikamp
parents:
diff changeset
1600 //
heinrichsweikamp
parents:
diff changeset
1601 // Inputs:
heinrichsweikamp
parents:
diff changeset
1602 // temp_depth_limit = stop's depth, in meters.
heinrichsweikamp
parents:
diff changeset
1603 // In/Out:
heinrichsweikamp
parents:
diff changeset
1604 // internal_deco_depth[] : depth (in metres) of each stops.
heinrichsweikamp
parents:
diff changeset
1605 // internal_deco_time [] : time (in minutes) of each stops.
heinrichsweikamp
parents:
diff changeset
1606 //
heinrichsweikamp
parents:
diff changeset
1607 static unsigned char update_deco_table()
heinrichsweikamp
parents:
diff changeset
1608 {
heinrichsweikamp
parents:
diff changeset
1609 overlay unsigned char x;
heinrichsweikamp
parents:
diff changeset
1610 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown).
heinrichsweikamp
parents:
diff changeset
1611 assert( temp_depth_limit > 0 ); // No stop at surface...
heinrichsweikamp
parents:
diff changeset
1612
heinrichsweikamp
parents:
diff changeset
1613 for(x=0; x<NUM_STOPS; ++x)
heinrichsweikamp
parents:
diff changeset
1614 {
heinrichsweikamp
parents:
diff changeset
1615 // Make sure deco-stops are recorded in order:
heinrichsweikamp
parents:
diff changeset
1616 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) );
heinrichsweikamp
parents:
diff changeset
1617
heinrichsweikamp
parents:
diff changeset
1618 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit )
heinrichsweikamp
parents:
diff changeset
1619 {
heinrichsweikamp
parents:
diff changeset
1620 // Do not overflow (max 255')
heinrichsweikamp
parents:
diff changeset
1621 if( internal_deco_time[x] < 255 )
heinrichsweikamp
parents:
diff changeset
1622 {
heinrichsweikamp
parents:
diff changeset
1623 internal_deco_time[x]++;
heinrichsweikamp
parents:
diff changeset
1624 return 1;
heinrichsweikamp
parents:
diff changeset
1625 }
heinrichsweikamp
parents:
diff changeset
1626 // But store extra in the next stop...
heinrichsweikamp
parents:
diff changeset
1627 }
heinrichsweikamp
parents:
diff changeset
1628
heinrichsweikamp
parents:
diff changeset
1629 if( internal_deco_depth[x] == 0 )
heinrichsweikamp
parents:
diff changeset
1630 {
heinrichsweikamp
parents:
diff changeset
1631 internal_deco_depth[x] = temp_depth_limit;
heinrichsweikamp
parents:
diff changeset
1632
heinrichsweikamp
parents:
diff changeset
1633 internal_deco_time[x] = 1;
heinrichsweikamp
parents:
diff changeset
1634 return 1;
heinrichsweikamp
parents:
diff changeset
1635 }
heinrichsweikamp
parents:
diff changeset
1636 }
heinrichsweikamp
parents:
diff changeset
1637
heinrichsweikamp
parents:
diff changeset
1638 // Can't store stops at more than 96m.
heinrichsweikamp
parents:
diff changeset
1639 // Or stops at less that 3m too.
heinrichsweikamp
parents:
diff changeset
1640 // Just do nothing with that...
heinrichsweikamp
parents:
diff changeset
1641 return 0;
heinrichsweikamp
parents:
diff changeset
1642 }
heinrichsweikamp
parents:
diff changeset
1643
heinrichsweikamp
parents:
diff changeset
1644 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1645 // calc_gradient_factor
heinrichsweikamp
parents:
diff changeset
1646 //
heinrichsweikamp
parents:
diff changeset
1647 // optimized in v.101 (var_N2_a)
heinrichsweikamp
parents:
diff changeset
1648 // new code in v.102
heinrichsweikamp
parents:
diff changeset
1649 //
heinrichsweikamp
parents:
diff changeset
1650 static void calc_gradient_factor(void)
heinrichsweikamp
parents:
diff changeset
1651 {
heinrichsweikamp
parents:
diff changeset
1652 overlay float gf;
heinrichsweikamp
parents:
diff changeset
1653 overlay float N2 = pres_tissue_N2[char_O_gtissue_no];
heinrichsweikamp
parents:
diff changeset
1654 overlay float He = pres_tissue_He[char_O_gtissue_no];
heinrichsweikamp
parents:
diff changeset
1655
heinrichsweikamp
parents:
diff changeset
1656 assert( char_O_gtissue_no < NUM_COMP );
heinrichsweikamp
parents:
diff changeset
1657 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 );
heinrichsweikamp
parents:
diff changeset
1658
heinrichsweikamp
parents:
diff changeset
1659 // tissue > respiration (currently off-gasing)
heinrichsweikamp
parents:
diff changeset
1660 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium.
heinrichsweikamp
parents:
diff changeset
1661 // GF = 100% when respiration == limit.
heinrichsweikamp
parents:
diff changeset
1662 temp_tissue = N2 + He;
heinrichsweikamp
parents:
diff changeset
1663 if( temp_tissue <= pres_respiration )
heinrichsweikamp
parents:
diff changeset
1664 gf = 0.0;
heinrichsweikamp
parents:
diff changeset
1665 else
heinrichsweikamp
parents:
diff changeset
1666 {
heinrichsweikamp
parents:
diff changeset
1667 overlay float limit = calc_lead_tissue_limit;
heinrichsweikamp
parents:
diff changeset
1668 // NOTE: in GF model, calc_lead_tissue_limit include already the
heinrichsweikamp
parents:
diff changeset
1669 // correction due to gradient factor. To compute the actual
heinrichsweikamp
parents:
diff changeset
1670 // current GF, we need to (re-)compute the raw ambiant-pressure
heinrichsweikamp
parents:
diff changeset
1671 // limit from the Bühlmann model.
heinrichsweikamp
parents:
diff changeset
1672 if( char_I_deco_model != 0 )
heinrichsweikamp
parents:
diff changeset
1673 {
heinrichsweikamp
parents:
diff changeset
1674 ci = char_O_gtissue_no;
heinrichsweikamp
parents:
diff changeset
1675 read_buhlmann_coefficients();
heinrichsweikamp
parents:
diff changeset
1676 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue;
heinrichsweikamp
parents:
diff changeset
1677 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue;
heinrichsweikamp
parents:
diff changeset
1678 limit = (temp_tissue - var_N2_a) * var_N2_b;
heinrichsweikamp
parents:
diff changeset
1679 }
heinrichsweikamp
parents:
diff changeset
1680
heinrichsweikamp
parents:
diff changeset
1681 gf = (temp_tissue - pres_respiration)
heinrichsweikamp
parents:
diff changeset
1682 / (temp_tissue - limit)
heinrichsweikamp
parents:
diff changeset
1683 * 100.0;
heinrichsweikamp
parents:
diff changeset
1684 if( gf > 254.5 ) gf = 255.0;
heinrichsweikamp
parents:
diff changeset
1685 if( gf < 0.0 ) gf = 0.0;
heinrichsweikamp
parents:
diff changeset
1686 }
heinrichsweikamp
parents:
diff changeset
1687 char_O_gradient_factor = (unsigned char)(gf+0.5f);
heinrichsweikamp
parents:
diff changeset
1688
heinrichsweikamp
parents:
diff changeset
1689 if( char_I_deco_model != 0 ) // calculate relative gradient factor
heinrichsweikamp
parents:
diff changeset
1690 {
heinrichsweikamp
parents:
diff changeset
1691 overlay float rgf;
heinrichsweikamp
parents:
diff changeset
1692
heinrichsweikamp
parents:
diff changeset
1693 if( low_depth < 3 )
heinrichsweikamp
parents:
diff changeset
1694 rgf = GF_high;
heinrichsweikamp
parents:
diff changeset
1695 else
heinrichsweikamp
parents:
diff changeset
1696 {
heinrichsweikamp
parents:
diff changeset
1697 overlay float temp1 = low_depth * METER_TO_BAR;
heinrichsweikamp
parents:
diff changeset
1698 overlay float temp2 = pres_respiration - pres_surface;
heinrichsweikamp
parents:
diff changeset
1699
heinrichsweikamp
parents:
diff changeset
1700 if (temp2 <= 0)
heinrichsweikamp
parents:
diff changeset
1701 rgf = GF_high;
heinrichsweikamp
parents:
diff changeset
1702 else if (temp2 >= temp1)
heinrichsweikamp
parents:
diff changeset
1703 rgf = GF_low;
heinrichsweikamp
parents:
diff changeset
1704 else
heinrichsweikamp
parents:
diff changeset
1705 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta;
heinrichsweikamp
parents:
diff changeset
1706 }
heinrichsweikamp
parents:
diff changeset
1707
heinrichsweikamp
parents:
diff changeset
1708 rgf = gf / rgf; // gf is already in percent
heinrichsweikamp
parents:
diff changeset
1709 if( rgf < 0.0 ) rgf = 0.0;
heinrichsweikamp
parents:
diff changeset
1710 if( rgf > 254.5 ) rgf = 255.0;
heinrichsweikamp
parents:
diff changeset
1711 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f);
heinrichsweikamp
parents:
diff changeset
1712 }
heinrichsweikamp
parents:
diff changeset
1713 else
heinrichsweikamp
parents:
diff changeset
1714 char_O_relative_gradient_GF = char_O_gradient_factor;
heinrichsweikamp
parents:
diff changeset
1715 }
heinrichsweikamp
parents:
diff changeset
1716
heinrichsweikamp
parents:
diff changeset
1717 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1718 // deco_calc_desaturation_time
heinrichsweikamp
parents:
diff changeset
1719 //
heinrichsweikamp
parents:
diff changeset
1720 // FIXED N2_ratio
heinrichsweikamp
parents:
diff changeset
1721 // unchanged in v.101
heinrichsweikamp
parents:
diff changeset
1722 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier
heinrichsweikamp
parents:
diff changeset
1723 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31]
heinrichsweikamp
parents:
diff changeset
1724 //
heinrichsweikamp
parents:
diff changeset
1725 void deco_calc_desaturation_time(void)
heinrichsweikamp
parents:
diff changeset
1726 {
heinrichsweikamp
parents:
diff changeset
1727 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
1728
heinrichsweikamp
parents:
diff changeset
1729 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 );
heinrichsweikamp
parents:
diff changeset
1730 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 );
heinrichsweikamp
parents:
diff changeset
1731
heinrichsweikamp
parents:
diff changeset
1732 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann
heinrichsweikamp
parents:
diff changeset
1733 pres_surface = int_I_pres_surface * 0.001;
heinrichsweikamp
parents:
diff changeset
1734 ppN2 = N2_ratio * (pres_surface - ppWater);
heinrichsweikamp
parents:
diff changeset
1735 int_O_desaturation_time = 0;
heinrichsweikamp
parents:
diff changeset
1736 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR);
heinrichsweikamp
parents:
diff changeset
1737
heinrichsweikamp
parents:
diff changeset
1738 for(ci=0; ci<NUM_COMP; ci++)
heinrichsweikamp
parents:
diff changeset
1739 {
heinrichsweikamp
parents:
diff changeset
1740 overlay unsigned short desat_time; // For a particular compartiment, in min.
heinrichsweikamp
parents:
diff changeset
1741 overlay float temp1;
heinrichsweikamp
parents:
diff changeset
1742 overlay float temp2;
heinrichsweikamp
parents:
diff changeset
1743 overlay float temp3;
heinrichsweikamp
parents:
diff changeset
1744 overlay float temp4;
heinrichsweikamp
parents:
diff changeset
1745
heinrichsweikamp
parents:
diff changeset
1746 read_buhlmann_ht();
heinrichsweikamp
parents:
diff changeset
1747
heinrichsweikamp
parents:
diff changeset
1748 // saturation_time (for flight) and N2_saturation in multiples of halftime
heinrichsweikamp
parents:
diff changeset
1749 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time )
heinrichsweikamp
parents:
diff changeset
1750 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time )
heinrichsweikamp
parents:
diff changeset
1751 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations
heinrichsweikamp
parents:
diff changeset
1752 // N2
heinrichsweikamp
parents:
diff changeset
1753 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci];
heinrichsweikamp
parents:
diff changeset
1754 temp2 = ppN2 - pres_tissue_N2[ci];
heinrichsweikamp
parents:
diff changeset
1755 if (temp2 >= 0.0)
heinrichsweikamp
parents:
diff changeset
1756 temp1 = 0.0;
heinrichsweikamp
parents:
diff changeset
1757 else
heinrichsweikamp
parents:
diff changeset
1758 temp1 = temp1 / temp2;
heinrichsweikamp
parents:
diff changeset
1759
heinrichsweikamp
parents:
diff changeset
1760 if( 0.0 < temp1 && temp1 < 1.0 )
heinrichsweikamp
parents:
diff changeset
1761 {
heinrichsweikamp
parents:
diff changeset
1762 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested.
heinrichsweikamp
parents:
diff changeset
1763 // minus because log is negative.
heinrichsweikamp
parents:
diff changeset
1764 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary.
heinrichsweikamp
parents:
diff changeset
1765 temp2 = var_N2_ht * temp1 / float_desaturation_multiplier; // time necessary (in minutes ) for complete desaturation (see comment about 5 percent)
heinrichsweikamp
parents:
diff changeset
1766 }
heinrichsweikamp
parents:
diff changeset
1767 else
heinrichsweikamp
parents:
diff changeset
1768 {
heinrichsweikamp
parents:
diff changeset
1769 temp1 = 0.0;
heinrichsweikamp
parents:
diff changeset
1770 temp2 = 0.0;
heinrichsweikamp
parents:
diff changeset
1771 }
heinrichsweikamp
parents:
diff changeset
1772
heinrichsweikamp
parents:
diff changeset
1773 // He
heinrichsweikamp
parents:
diff changeset
1774 temp3 = 0.1 - pres_tissue_He[ci];
heinrichsweikamp
parents:
diff changeset
1775 if (temp3 >= 0.0)
heinrichsweikamp
parents:
diff changeset
1776 temp3 = 0.0;
heinrichsweikamp
parents:
diff changeset
1777 else
heinrichsweikamp
parents:
diff changeset
1778 temp3 = - temp3 / pres_tissue_He[ci];
heinrichsweikamp
parents:
diff changeset
1779
heinrichsweikamp
parents:
diff changeset
1780 if( 0.0 < temp3 && temp3 < 1.0 )
heinrichsweikamp
parents:
diff changeset
1781 {
heinrichsweikamp
parents:
diff changeset
1782 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary.
heinrichsweikamp
parents:
diff changeset
1783 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested.
heinrichsweikamp
parents:
diff changeset
1784 // minus because log is negative
heinrichsweikamp
parents:
diff changeset
1785 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier
heinrichsweikamp
parents:
diff changeset
1786 }
heinrichsweikamp
parents:
diff changeset
1787 else
heinrichsweikamp
parents:
diff changeset
1788 {
heinrichsweikamp
parents:
diff changeset
1789 temp3 = 0.0;
heinrichsweikamp
parents:
diff changeset
1790 temp4 = 0.0;
heinrichsweikamp
parents:
diff changeset
1791 }
heinrichsweikamp
parents:
diff changeset
1792
heinrichsweikamp
parents:
diff changeset
1793 // saturation_time (for flight)
heinrichsweikamp
parents:
diff changeset
1794 if (temp4 > temp2)
heinrichsweikamp
parents:
diff changeset
1795 desat_time = (unsigned short)temp4;
heinrichsweikamp
parents:
diff changeset
1796 else
heinrichsweikamp
parents:
diff changeset
1797 desat_time = (unsigned short)temp2;
heinrichsweikamp
parents:
diff changeset
1798
heinrichsweikamp
parents:
diff changeset
1799 if(desat_time > int_O_desaturation_time)
heinrichsweikamp
parents:
diff changeset
1800 int_O_desaturation_time = desat_time;
heinrichsweikamp
parents:
diff changeset
1801
heinrichsweikamp
parents:
diff changeset
1802 // N2 saturation in multiples of halftime for display purposes
heinrichsweikamp
parents:
diff changeset
1803 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8
heinrichsweikamp
parents:
diff changeset
1804 temp2 = temp2 + 80.0; // set center
heinrichsweikamp
parents:
diff changeset
1805 if (temp2 < 0.0)
heinrichsweikamp
parents:
diff changeset
1806 temp2 = 0.0;
heinrichsweikamp
parents:
diff changeset
1807 if (temp2 > 255.0)
heinrichsweikamp
parents:
diff changeset
1808 temp2 = 255.0;
heinrichsweikamp
parents:
diff changeset
1809 char_O_tissue_N2_saturation[ci] = (char)temp2;
heinrichsweikamp
parents:
diff changeset
1810
heinrichsweikamp
parents:
diff changeset
1811 // He saturation in multiples of halftime for display purposes
heinrichsweikamp
parents:
diff changeset
1812 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8
heinrichsweikamp
parents:
diff changeset
1813 temp4 = temp4 + 80.0; // set center
heinrichsweikamp
parents:
diff changeset
1814 if (temp4 < 0.0)
heinrichsweikamp
parents:
diff changeset
1815 temp4 = 0.0;
heinrichsweikamp
parents:
diff changeset
1816 if (temp4 > 255.0)
heinrichsweikamp
parents:
diff changeset
1817 temp4 = 255.0;
heinrichsweikamp
parents:
diff changeset
1818 char_O_tissue_He_saturation[ci] = (char)temp4;
heinrichsweikamp
parents:
diff changeset
1819 } // for
heinrichsweikamp
parents:
diff changeset
1820 }
heinrichsweikamp
parents:
diff changeset
1821
heinrichsweikamp
parents:
diff changeset
1822 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1823 // calc_wo_deco_step_1_min
heinrichsweikamp
parents:
diff changeset
1824 //
heinrichsweikamp
parents:
diff changeset
1825 // FIXED N2 Ratio
heinrichsweikamp
parents:
diff changeset
1826 // optimized in v.101 (...saturation_multiplier)
heinrichsweikamp
parents:
diff changeset
1827 // desaturation slowed down to 70,42%
heinrichsweikamp
parents:
diff changeset
1828 //
heinrichsweikamp
parents:
diff changeset
1829 static void calc_wo_deco_step_1_min(void)
heinrichsweikamp
parents:
diff changeset
1830 {
heinrichsweikamp
parents:
diff changeset
1831 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 );
heinrichsweikamp
parents:
diff changeset
1832 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 );
heinrichsweikamp
parents:
diff changeset
1833 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 );
heinrichsweikamp
parents:
diff changeset
1834 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 );
heinrichsweikamp
parents:
diff changeset
1835
heinrichsweikamp
parents:
diff changeset
1836 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann
heinrichsweikamp
parents:
diff changeset
1837 pres_respiration = pres_surface = int_I_pres_surface * 0.001;
heinrichsweikamp
parents:
diff changeset
1838 ppN2 = N2_ratio * (pres_respiration - ppWater);
heinrichsweikamp
parents:
diff changeset
1839 ppHe = 0.0;
heinrichsweikamp
parents:
diff changeset
1840 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR);
heinrichsweikamp
parents:
diff changeset
1841 float_saturation_multiplier = char_I_saturation_multiplier * 0.01;
heinrichsweikamp
parents:
diff changeset
1842
heinrichsweikamp
parents:
diff changeset
1843 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure
heinrichsweikamp
parents:
diff changeset
1844
heinrichsweikamp
parents:
diff changeset
1845 clear_deco_table();
heinrichsweikamp
parents:
diff changeset
1846 char_O_deco_status = 3; // surface new in v.102 : stays in surface state.
heinrichsweikamp
parents:
diff changeset
1847 char_O_nullzeit = 0;
heinrichsweikamp
parents:
diff changeset
1848 int_O_ascenttime = 0;
heinrichsweikamp
parents:
diff changeset
1849 int_O_extra_ascenttime = 0;
heinrichsweikamp
parents:
diff changeset
1850 calc_gradient_factor();
heinrichsweikamp
parents:
diff changeset
1851 }
heinrichsweikamp
parents:
diff changeset
1852
heinrichsweikamp
parents:
diff changeset
1853 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1854 // calc_dive_interval
heinrichsweikamp
parents:
diff changeset
1855 //
heinrichsweikamp
parents:
diff changeset
1856 // Prepare tissue for delay before the next dive simulation.
heinrichsweikamp
parents:
diff changeset
1857 //
heinrichsweikamp
parents:
diff changeset
1858 // Inputs: char_I_dive_interval == delay before dive (in 10' steps).
heinrichsweikamp
parents:
diff changeset
1859 // Outputs: pres_tissue_N2/He[], CNS_fraction
heinrichsweikamp
parents:
diff changeset
1860 //
heinrichsweikamp
parents:
diff changeset
1861 // Should be protected by deco_push_tissues_to_vault(),
heinrichsweikamp
parents:
diff changeset
1862 // deco_pull_tissues_from_vault()
heinrichsweikamp
parents:
diff changeset
1863 //
heinrichsweikamp
parents:
diff changeset
1864 // desaturation slowed down to 70,42%.
heinrichsweikamp
parents:
diff changeset
1865 //
heinrichsweikamp
parents:
diff changeset
1866 static void calc_dive_interval(void)
heinrichsweikamp
parents:
diff changeset
1867 {
heinrichsweikamp
parents:
diff changeset
1868 overlay unsigned char t;
heinrichsweikamp
parents:
diff changeset
1869 overlay unsigned char backup_model;
heinrichsweikamp
parents:
diff changeset
1870
heinrichsweikamp
parents:
diff changeset
1871 //---- Initialize simulation parameters ----------------------------------
heinrichsweikamp
parents:
diff changeset
1872 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann
heinrichsweikamp
parents:
diff changeset
1873 pres_respiration = pres_surface = int_I_pres_surface * 0.001;
heinrichsweikamp
parents:
diff changeset
1874 ppN2 = N2_ratio * (pres_respiration - ppWater);
heinrichsweikamp
parents:
diff changeset
1875 ppHe = 0.0;
heinrichsweikamp
parents:
diff changeset
1876 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR);
heinrichsweikamp
parents:
diff changeset
1877 float_saturation_multiplier = char_I_saturation_multiplier * 0.01;
heinrichsweikamp
parents:
diff changeset
1878
heinrichsweikamp
parents:
diff changeset
1879 // Make sure SURFACE_DESAT_FACTOR is applied:
heinrichsweikamp
parents:
diff changeset
1880 backup_model = char_I_deco_model;
heinrichsweikamp
parents:
diff changeset
1881 char_I_deco_model = 0;
heinrichsweikamp
parents:
diff changeset
1882
heinrichsweikamp
parents:
diff changeset
1883 //---- Perform simulation ------------------------------------------------
heinrichsweikamp
parents:
diff changeset
1884 for(t=0; t<char_I_dive_interval; ++t)
heinrichsweikamp
parents:
diff changeset
1885 {
heinrichsweikamp
parents:
diff changeset
1886 calc_tissue(2); // period = 10min.
heinrichsweikamp
parents:
diff changeset
1887 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9)
heinrichsweikamp
parents:
diff changeset
1888 }
heinrichsweikamp
parents:
diff changeset
1889 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 );
heinrichsweikamp
parents:
diff changeset
1890 int_O_CNS_fraction = (unsigned int)(CNS_fraction * 100.0 + 0.5);
heinrichsweikamp
parents:
diff changeset
1891
heinrichsweikamp
parents:
diff changeset
1892 //---- Restore model -----------------------------------------------------
heinrichsweikamp
parents:
diff changeset
1893 char_I_deco_model = backup_model;
heinrichsweikamp
parents:
diff changeset
1894 }
heinrichsweikamp
parents:
diff changeset
1895
heinrichsweikamp
parents:
diff changeset
1896 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1897 // deco_clear_CNS_fraction
heinrichsweikamp
parents:
diff changeset
1898 //
heinrichsweikamp
parents:
diff changeset
1899 // new in v.101
heinrichsweikamp
parents:
diff changeset
1900 //
heinrichsweikamp
parents:
diff changeset
1901 void deco_clear_CNS_fraction(void)
heinrichsweikamp
parents:
diff changeset
1902 {
heinrichsweikamp
parents:
diff changeset
1903 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
1904
heinrichsweikamp
parents:
diff changeset
1905 CNS_fraction = 0.0;
heinrichsweikamp
parents:
diff changeset
1906 int_O_CNS_fraction = 0;
heinrichsweikamp
parents:
diff changeset
1907 }
heinrichsweikamp
parents:
diff changeset
1908
heinrichsweikamp
parents:
diff changeset
1909 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1910 // deco_calc_CNS_fraction
heinrichsweikamp
parents:
diff changeset
1911 //
heinrichsweikamp
parents:
diff changeset
1912 // Input: char_I_actual_ppO2 : Current condition (in decibars).
heinrichsweikamp
parents:
diff changeset
1913 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec.
heinrichsweikamp
parents:
diff changeset
1914 // CNS_fraction : velue before period.
heinrichsweikamp
parents:
diff changeset
1915 // Output: CNS_fraction, int_O_CNS_fraction
heinrichsweikamp
parents:
diff changeset
1916 //
heinrichsweikamp
parents:
diff changeset
1917 void deco_calc_CNS_fraction(void)
heinrichsweikamp
parents:
diff changeset
1918 {
heinrichsweikamp
parents:
diff changeset
1919 overlay float time_factor = 1.0f;
heinrichsweikamp
parents:
diff changeset
1920 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
1921
heinrichsweikamp
parents:
diff changeset
1922 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 );
heinrichsweikamp
parents:
diff changeset
1923 assert( char_I_actual_ppO2 > 15 );
heinrichsweikamp
parents:
diff changeset
1924
heinrichsweikamp
parents:
diff changeset
1925 if( char_I_step_is_1min == 1 )
heinrichsweikamp
parents:
diff changeset
1926 time_factor = 30.0f;
heinrichsweikamp
parents:
diff changeset
1927 else if( char_I_step_is_1min == 2 )
heinrichsweikamp
parents:
diff changeset
1928 time_factor = 300.0f;
33
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1929 //------------------------------------------------------------------------
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1930 // Don't increase CNS below 0.5 bar, but keep it steady.
0
heinrichsweikamp
parents:
diff changeset
1931 if (char_I_actual_ppO2 < 50)
heinrichsweikamp
parents:
diff changeset
1932 ; // no changes
33
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1933 //------------------------------------------------------------------------
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1934 // Below (and including) 1.60 bar
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1935 else if (char_I_actual_ppO2 < 61)
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1936 CNS_fraction += time_factor/(-533.07 * char_I_actual_ppO2 + 54000.0);
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1937 else if (char_I_actual_ppO2 < 71)
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1938 CNS_fraction += time_factor/(-444.22 * char_I_actual_ppO2 + 48600.0);
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1939 else if (char_I_actual_ppO2 < 81)
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1940 CNS_fraction += time_factor/(-355.38 * char_I_actual_ppO2 + 42300.0);
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1941 else if (char_I_actual_ppO2 < 91)
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1942 CNS_fraction += time_factor/(-266.53 * char_I_actual_ppO2 + 35100.0);
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1943 else if (char_I_actual_ppO2 < 111)
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1944 CNS_fraction += time_factor/(-177.69 * char_I_actual_ppO2 + 27000.0);
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1945 else if (char_I_actual_ppO2 < 152)
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1946 CNS_fraction += time_factor/( -88.84 * char_I_actual_ppO2 + 17100.0);
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1947 else if (char_I_actual_ppO2 < 167)
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1948 CNS_fraction += time_factor/(-222.11 * char_I_actual_ppO2 + 37350.0);
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1949 //------------------------------------------------------------------------
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1950 // Arieli et all.(2002): Modeling pulmonary and CNS O2 toxicity:
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1951 // J Appl Physiol 92: 248–256, 2002, doi:10.1152/japplphysiol.00434.2001
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1952 // Formula (A1) based on value for 1.55 and c=20
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1953 // example calculation: Sqrt((1.7/1.55)^20)*0.000404
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1954 else if (char_I_actual_ppO2 < 172)
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1955 CNS_fraction += time_factor*0.00102;
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1956 else if (char_I_actual_ppO2 < 177)
0
heinrichsweikamp
parents:
diff changeset
1957 CNS_fraction += time_factor*0.00136;
33
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1958 else if (char_I_actual_ppO2 < 182)
0
heinrichsweikamp
parents:
diff changeset
1959 CNS_fraction += time_factor*0.00180;
33
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1960 else if (char_I_actual_ppO2 < 187)
0
heinrichsweikamp
parents:
diff changeset
1961 CNS_fraction += time_factor*0.00237;
33
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1962 else if (char_I_actual_ppO2 < 192)
0
heinrichsweikamp
parents:
diff changeset
1963 CNS_fraction += time_factor*0.00310;
33
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1964 else if (char_I_actual_ppO2 < 198)
0
heinrichsweikamp
parents:
diff changeset
1965 CNS_fraction += time_factor*0.00401;
33
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1966 else if (char_I_actual_ppO2 < 203)
0
heinrichsweikamp
parents:
diff changeset
1967 CNS_fraction += time_factor*0.00517;
33
5d4a4fb0e8a6 Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents: 0
diff changeset
1968 else if (char_I_actual_ppO2 < 233)
0
heinrichsweikamp
parents:
diff changeset
1969 CNS_fraction += time_factor*0.0209;
heinrichsweikamp
parents:
diff changeset
1970 else
heinrichsweikamp
parents:
diff changeset
1971 CNS_fraction += time_factor*0.0482; // value for 2.5
heinrichsweikamp
parents:
diff changeset
1972
heinrichsweikamp
parents:
diff changeset
1973 if( CNS_fraction > 9.99)
heinrichsweikamp
parents:
diff changeset
1974 CNS_fraction = 9.99;
heinrichsweikamp
parents:
diff changeset
1975 if( CNS_fraction < 0.0 )
heinrichsweikamp
parents:
diff changeset
1976 CNS_fraction = 0.0;
heinrichsweikamp
parents:
diff changeset
1977
heinrichsweikamp
parents:
diff changeset
1978 int_O_CNS_fraction = (unsigned int)(100.0 * CNS_fraction + 0.5);
heinrichsweikamp
parents:
diff changeset
1979 }
heinrichsweikamp
parents:
diff changeset
1980
heinrichsweikamp
parents:
diff changeset
1981 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
1982 // deco_calc_CNS_planning
heinrichsweikamp
parents:
diff changeset
1983 //
heinrichsweikamp
parents:
diff changeset
1984 // Compute CNS during predicted ascent.
heinrichsweikamp
parents:
diff changeset
1985 //
heinrichsweikamp
parents:
diff changeset
1986 // Note: Needs a call to deco_push_tissues_to_vault(),
heinrichsweikamp
parents:
diff changeset
1987 // deco_pull_tissues_from_vault() to avoid trashing everything...
heinrichsweikamp
parents:
diff changeset
1988 //
heinrichsweikamp
parents:
diff changeset
1989 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[]
heinrichsweikamp
parents:
diff changeset
1990 // Output: CNS_fraction, int_O_CNS_fraction
heinrichsweikamp
parents:
diff changeset
1991 //
heinrichsweikamp
parents:
diff changeset
1992 void deco_calc_CNS_planning(void)
heinrichsweikamp
parents:
diff changeset
1993 {
heinrichsweikamp
parents:
diff changeset
1994 overlay unsigned char backup_gas_last_depth;
heinrichsweikamp
parents:
diff changeset
1995 overlay unsigned char backup_gas_last_used;
heinrichsweikamp
parents:
diff changeset
1996 overlay unsigned short backup_dive_mins;
heinrichsweikamp
parents:
diff changeset
1997 overlay unsigned char backup_actual_ppO2;
heinrichsweikamp
parents:
diff changeset
1998
heinrichsweikamp
parents:
diff changeset
1999 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
2000
heinrichsweikamp
parents:
diff changeset
2001 // Backup state machine
heinrichsweikamp
parents:
diff changeset
2002 backup_gas_last_depth = sim_gas_last_depth;
heinrichsweikamp
parents:
diff changeset
2003 backup_gas_last_used = sim_gas_last_used;
heinrichsweikamp
parents:
diff changeset
2004 backup_dive_mins = sim_dive_mins;
heinrichsweikamp
parents:
diff changeset
2005 backup_actual_ppO2 = char_I_actual_ppO2;
heinrichsweikamp
parents:
diff changeset
2006
heinrichsweikamp
parents:
diff changeset
2007 // Uses 1min CNS period:
heinrichsweikamp
parents:
diff changeset
2008 char_I_step_is_1min = 1;
heinrichsweikamp
parents:
diff changeset
2009
heinrichsweikamp
parents:
diff changeset
2010 //---- Retrieve bottom Gas used, and set variables.
heinrichsweikamp
parents:
diff changeset
2011 sim_gas_last_used = char_I_first_gas;
heinrichsweikamp
parents:
diff changeset
2012 sim_gas_last_depth = 0; // Surface gas marker.
heinrichsweikamp
parents:
diff changeset
2013 gas_switch_set(); // Sets initial calc_N2/He_ratio
heinrichsweikamp
parents:
diff changeset
2014
heinrichsweikamp
parents:
diff changeset
2015 //---- CCR mode : do the full TTS at once --------------------------------
heinrichsweikamp
parents:
diff changeset
2016 if( char_I_const_ppO2 != 0 )
heinrichsweikamp
parents:
diff changeset
2017 {
heinrichsweikamp
parents:
diff changeset
2018 overlay unsigned short t; // Needs 16bits here !
heinrichsweikamp
parents:
diff changeset
2019 char_I_actual_ppO2 = char_I_const_ppO2;
heinrichsweikamp
parents:
diff changeset
2020 for(t=0; t<int_O_ascenttime; ++t)
heinrichsweikamp
parents:
diff changeset
2021 deco_calc_CNS_fraction();
heinrichsweikamp
parents:
diff changeset
2022 }
heinrichsweikamp
parents:
diff changeset
2023 else //---- OC mode : have to follow all gas switches... -----------------
heinrichsweikamp
parents:
diff changeset
2024 {
heinrichsweikamp
parents:
diff changeset
2025 overlay unsigned char i = 0; // Decostop loop counter
heinrichsweikamp
parents:
diff changeset
2026 overlay float actual_ppO2;
heinrichsweikamp
parents:
diff changeset
2027 overlay unsigned char time, t;
heinrichsweikamp
parents:
diff changeset
2028
heinrichsweikamp
parents:
diff changeset
2029 //---- Ascent to surface delay
heinrichsweikamp
parents:
diff changeset
2030 // NOTE: count as if time is spent with bottom pressure,
heinrichsweikamp
parents:
diff changeset
2031 // AND the bottom gas
heinrichsweikamp
parents:
diff changeset
2032 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR)
heinrichsweikamp
parents:
diff changeset
2033 * (1.0 - calc_N2_ratio - calc_He_ratio);
heinrichsweikamp
parents:
diff changeset
2034 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0;
heinrichsweikamp
parents:
diff changeset
2035 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55;
heinrichsweikamp
parents:
diff changeset
2036 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5);
heinrichsweikamp
parents:
diff changeset
2037
heinrichsweikamp
parents:
diff changeset
2038 // Ascent time (rounded up):
heinrichsweikamp
parents:
diff changeset
2039 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5);
heinrichsweikamp
parents:
diff changeset
2040
heinrichsweikamp
parents:
diff changeset
2041 for(t=0; t<time; ++t)
heinrichsweikamp
parents:
diff changeset
2042 {
heinrichsweikamp
parents:
diff changeset
2043 deco_calc_CNS_fraction();
heinrichsweikamp
parents:
diff changeset
2044 sim_dive_mins++;
heinrichsweikamp
parents:
diff changeset
2045 }
heinrichsweikamp
parents:
diff changeset
2046
heinrichsweikamp
parents:
diff changeset
2047 //---- Do all further stops ------------------------------------------
heinrichsweikamp
parents:
diff changeset
2048 for(i=0; i<NUM_STOPS; ++i)
heinrichsweikamp
parents:
diff changeset
2049 {
heinrichsweikamp
parents:
diff changeset
2050 overlay unsigned char switch_gas;
heinrichsweikamp
parents:
diff changeset
2051
heinrichsweikamp
parents:
diff changeset
2052 //---- Get next stop, possibly in reverse order ------------------
heinrichsweikamp
parents:
diff changeset
2053 {
heinrichsweikamp
parents:
diff changeset
2054 time = char_O_deco_time[(NUM_STOPS-1)-i];
heinrichsweikamp
parents:
diff changeset
2055 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i];
heinrichsweikamp
parents:
diff changeset
2056 }
heinrichsweikamp
parents:
diff changeset
2057 if( time == 0 ) continue;
heinrichsweikamp
parents:
diff changeset
2058
heinrichsweikamp
parents:
diff changeset
2059 //---- Gas Switch ? ----------------------------------------------
heinrichsweikamp
parents:
diff changeset
2060 switch_gas = temp_depth_limit & 0x80; // Switch flag.
heinrichsweikamp
parents:
diff changeset
2061 temp_depth_limit &= 0x7F; // True stop depth.
heinrichsweikamp
parents:
diff changeset
2062
heinrichsweikamp
parents:
diff changeset
2063 if( switch_gas )
heinrichsweikamp
parents:
diff changeset
2064 {
heinrichsweikamp
parents:
diff changeset
2065 gas_switch_deepest();
heinrichsweikamp
parents:
diff changeset
2066 gas_switch_set();
heinrichsweikamp
parents:
diff changeset
2067 }
heinrichsweikamp
parents:
diff changeset
2068
heinrichsweikamp
parents:
diff changeset
2069 //---- Convert Depth and N2_ratio to ppO2 ------------------------
heinrichsweikamp
parents:
diff changeset
2070 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR)
heinrichsweikamp
parents:
diff changeset
2071 * (1.0 - calc_N2_ratio - calc_He_ratio);
heinrichsweikamp
parents:
diff changeset
2072 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0;
heinrichsweikamp
parents:
diff changeset
2073 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55;
heinrichsweikamp
parents:
diff changeset
2074 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5);
heinrichsweikamp
parents:
diff changeset
2075
heinrichsweikamp
parents:
diff changeset
2076 //---- Apply the stop
heinrichsweikamp
parents:
diff changeset
2077 for(t=0; t<time; ++t)
heinrichsweikamp
parents:
diff changeset
2078 {
heinrichsweikamp
parents:
diff changeset
2079 deco_calc_CNS_fraction();
heinrichsweikamp
parents:
diff changeset
2080 sim_dive_mins++;
heinrichsweikamp
parents:
diff changeset
2081 }
heinrichsweikamp
parents:
diff changeset
2082 }
heinrichsweikamp
parents:
diff changeset
2083 }
heinrichsweikamp
parents:
diff changeset
2084
heinrichsweikamp
parents:
diff changeset
2085 //---- Back to normal mode... --------------------------------------------
heinrichsweikamp
parents:
diff changeset
2086 char_I_step_is_1min = 0;
heinrichsweikamp
parents:
diff changeset
2087 sim_gas_last_depth = backup_gas_last_depth;
heinrichsweikamp
parents:
diff changeset
2088 sim_gas_last_used = backup_gas_last_used;
heinrichsweikamp
parents:
diff changeset
2089 sim_dive_mins = backup_dive_mins;
heinrichsweikamp
parents:
diff changeset
2090 char_I_actual_ppO2 = backup_actual_ppO2;
heinrichsweikamp
parents:
diff changeset
2091 }
heinrichsweikamp
parents:
diff changeset
2092
heinrichsweikamp
parents:
diff changeset
2093 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
2094 // deco_calc_CNS_decrease_15min
heinrichsweikamp
parents:
diff changeset
2095 //
heinrichsweikamp
parents:
diff changeset
2096 // new in v.101
heinrichsweikamp
parents:
diff changeset
2097 //
heinrichsweikamp
parents:
diff changeset
2098 // calculates the half time of 90 minutes in 6 steps of 15 min
heinrichsweikamp
parents:
diff changeset
2099 // (Used in sleepmode, for low battery mode).
heinrichsweikamp
parents:
diff changeset
2100 //
heinrichsweikamp
parents:
diff changeset
2101 // Output: int_O_CNS_fraction
heinrichsweikamp
parents:
diff changeset
2102 // Uses and Updates: CNS_fraction
heinrichsweikamp
parents:
diff changeset
2103 //
heinrichsweikamp
parents:
diff changeset
2104 void deco_calc_CNS_decrease_15min(void)
heinrichsweikamp
parents:
diff changeset
2105 {
heinrichsweikamp
parents:
diff changeset
2106 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
2107 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 );
heinrichsweikamp
parents:
diff changeset
2108
heinrichsweikamp
parents:
diff changeset
2109 CNS_fraction = 0.890899 * CNS_fraction;
heinrichsweikamp
parents:
diff changeset
2110 int_O_CNS_fraction = (unsigned int)(CNS_fraction * 100.0 + 0.5);
heinrichsweikamp
parents:
diff changeset
2111 }
heinrichsweikamp
parents:
diff changeset
2112
heinrichsweikamp
parents:
diff changeset
2113 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
2114 // deco_calc_percentage
heinrichsweikamp
parents:
diff changeset
2115 //
heinrichsweikamp
parents:
diff changeset
2116 // new in v.101
heinrichsweikamp
parents:
diff changeset
2117 //
heinrichsweikamp
parents:
diff changeset
2118 // calculates int_I_temp * char_I_temp / 100
heinrichsweikamp
parents:
diff changeset
2119 // output is int_I_temp
heinrichsweikamp
parents:
diff changeset
2120 //
heinrichsweikamp
parents:
diff changeset
2121 // Used to compute NoFly remaining time.
heinrichsweikamp
parents:
diff changeset
2122 //
heinrichsweikamp
parents:
diff changeset
2123 void deco_calc_percentage(void)
heinrichsweikamp
parents:
diff changeset
2124 {
heinrichsweikamp
parents:
diff changeset
2125 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
2126
heinrichsweikamp
parents:
diff changeset
2127 assert( 60 <= char_I_temp && char_I_temp <= 100 );
heinrichsweikamp
parents:
diff changeset
2128 assert( int_I_temp < 5760 ); // Less than 4 days = 96h...
heinrichsweikamp
parents:
diff changeset
2129
heinrichsweikamp
parents:
diff changeset
2130 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 );
heinrichsweikamp
parents:
diff changeset
2131
heinrichsweikamp
parents:
diff changeset
2132 assert( int_I_temp < 5760 ); // Less than 96h too...
heinrichsweikamp
parents:
diff changeset
2133 }
heinrichsweikamp
parents:
diff changeset
2134
heinrichsweikamp
parents:
diff changeset
2135
heinrichsweikamp
parents:
diff changeset
2136 //////////////////////////////////////////////////////////////////////////////
heinrichsweikamp
parents:
diff changeset
2137 // deco_gas_volumes
heinrichsweikamp
parents:
diff changeset
2138 //
heinrichsweikamp
parents:
diff changeset
2139 // new in v.111
heinrichsweikamp
parents:
diff changeset
2140 //
heinrichsweikamp
parents:
diff changeset
2141 // calculates volumes for each gas.
heinrichsweikamp
parents:
diff changeset
2142 //
heinrichsweikamp
parents:
diff changeset
2143 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive.
heinrichsweikamp
parents:
diff changeset
2144 // Gas list.
heinrichsweikamp
parents:
diff changeset
2145 // char_I_first_gas is the bottom gas.
heinrichsweikamp
parents:
diff changeset
2146 // decoplan (char_O_deco_depth, char_O_deco_time).
heinrichsweikamp
parents:
diff changeset
2147 // CF#54 == TRUE if shallowest stop first.
heinrichsweikamp
parents:
diff changeset
2148 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min.
heinrichsweikamp
parents:
diff changeset
2149 // CF#57 == deco liters/minutes (5 .. 50) or bar/min.
heinrichsweikamp
parents:
diff changeset
2150 // Output: int_O_gas_volumes[0..4] in litters * 0.1
heinrichsweikamp
parents:
diff changeset
2151 //
heinrichsweikamp
parents:
diff changeset
2152 void deco_gas_volumes(void)
heinrichsweikamp
parents:
diff changeset
2153 {
heinrichsweikamp
parents:
diff changeset
2154 overlay float volumes[NUM_GAS];
heinrichsweikamp
parents:
diff changeset
2155 overlay float bottom_usage, deco_usage;
heinrichsweikamp
parents:
diff changeset
2156 overlay unsigned char i, deepest_first;
heinrichsweikamp
parents:
diff changeset
2157 overlay unsigned char gas, depth;
heinrichsweikamp
parents:
diff changeset
2158 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
2159
heinrichsweikamp
parents:
diff changeset
2160 //---- initialize with bottom consumption --------------------------------
heinrichsweikamp
parents:
diff changeset
2161 for(i=0; i<NUM_GAS; ++i) // Nothing yet...
heinrichsweikamp
parents:
diff changeset
2162 volumes[i] = 0.0;
heinrichsweikamp
parents:
diff changeset
2163
heinrichsweikamp
parents:
diff changeset
2164 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS);
heinrichsweikamp
parents:
diff changeset
2165 gas = char_I_first_gas - 1;
heinrichsweikamp
parents:
diff changeset
2166
heinrichsweikamp
parents:
diff changeset
2167 bottom_usage = (float) char_I_bottom_usage;
heinrichsweikamp
parents:
diff changeset
2168 if( char_I_const_ppO2 == 0 && bottom_usage > 0.0 )
heinrichsweikamp
parents:
diff changeset
2169 volumes[gas]
heinrichsweikamp
parents:
diff changeset
2170 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar.
heinrichsweikamp
parents:
diff changeset
2171 * char_I_bottom_time // in minutes.
heinrichsweikamp
parents:
diff changeset
2172 * bottom_usage; // In liter/minutes.
heinrichsweikamp
parents:
diff changeset
2173
heinrichsweikamp
parents:
diff changeset
2174 //---- Ascent usage ------------------------------------------------------
heinrichsweikamp
parents:
diff changeset
2175 deco_usage = (float) char_I_deco_usage; // In liter/minutes.
heinrichsweikamp
parents:
diff changeset
2176
heinrichsweikamp
parents:
diff changeset
2177 depth = char_I_bottom_depth;
heinrichsweikamp
parents:
diff changeset
2178
heinrichsweikamp
parents:
diff changeset
2179 for(i=0; i<NUM_STOPS; ++i)
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parents:
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2180 {
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parents:
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2181 overlay unsigned char newDepth, time;
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parents:
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2182
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parents:
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2183 // Manage stops in reverse order (CF#54)
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parents:
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2184 if( deepest_first )
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parents:
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2185 {
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parents:
diff changeset
2186 time = char_O_deco_time[i];
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parents:
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2187 if( time == 0 ) break; // End of table: done.
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parents:
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2188
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parents:
diff changeset
2189 newDepth = char_O_deco_depth[i] & 0x7F;
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parents:
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2190 }
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parents:
diff changeset
2191 else
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parents:
diff changeset
2192 {
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parents:
diff changeset
2193 time = char_O_deco_time[31-i];
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parents:
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2194 if( time == 0 ) continue; // not yet: still search table.
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parents:
diff changeset
2195
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parents:
diff changeset
2196 newDepth = char_O_deco_depth[31-i] & 0x7F;
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parents:
diff changeset
2197 }
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parents:
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2198
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parents:
diff changeset
2199 //---- Gas switch during this step -----------------------------------
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parents:
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2200 {
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parents:
diff changeset
2201 overlay unsigned char newGas = 0;
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parents:
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2202 overlay unsigned char newStop = 0; // NO CHANGE yet
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parents:
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2203 overlay unsigned char j;
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parents:
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2204
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parents:
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2205 for(j=0; j<NUM_GAS; ++j)
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parents:
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2206 {
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parents:
diff changeset
2207 // Skip gas without changing depth:
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parents:
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2208 if( ! char_I_deco_gas_change[j] )
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parents:
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2209 continue;
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parents:
diff changeset
2210 // Select gas changed between [newDepth .. depth]
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parents:
diff changeset
2211 if( newDepth <= char_I_deco_gas_change[j]
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2212 && char_I_deco_gas_change[j] <= depth )
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2213 {
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parents:
diff changeset
2214 // Keep the DEEPEST gas in that range:
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parents:
diff changeset
2215 // Note: that = means changing gas at BEGINNING of this stop.
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parents:
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2216 if( char_I_deco_gas_change[j] >= newStop )
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parents:
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2217 {
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parents:
diff changeset
2218 newGas = j;
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parents:
diff changeset
2219 newStop = char_I_deco_gas_change[j];
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parents:
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2220 }
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parents:
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2221 }
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parents:
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2222 }
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parents:
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2223
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parents:
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2224 if( newStop ) // Did we find something ?
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parents:
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2225 {
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parents:
diff changeset
2226 // usage BEFORE gas switch (if any), at 10m/min :
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parents:
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2227 if( deco_usage > 0.0 && depth > newStop )
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parents:
diff changeset
2228 // Plus usage during ascent to the next stop, at 10m/min.
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parents:
diff changeset
2229 volumes[gas] += ((depth+newStop)*0.05 + 1.0) // average depth --> bar.
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parents:
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2230 * (depth-newStop)*0.1 // metre --> min
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parents:
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2231 * deco_usage;
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parents:
diff changeset
2232
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parents:
diff changeset
2233 // Do gas switch:
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parents:
diff changeset
2234 gas = newGas;
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parents:
diff changeset
2235 depth = newStop;
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parents:
diff changeset
2236 }
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parents:
diff changeset
2237 }
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parents:
diff changeset
2238
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parents:
diff changeset
2239 // usage AFTER gas switch (if any), at 10m/min :
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parents:
diff changeset
2240 if( depth > newDepth )
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parents:
diff changeset
2241 volumes[gas] += ((depth+newDepth)*0.05 + 1.0) // average depth --> bar.
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parents:
diff changeset
2242 * (depth-newDepth)*0.1 // metre --> min
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parents:
diff changeset
2243 * deco_usage;
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parents:
diff changeset
2244
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parents:
diff changeset
2245 // Do stop:
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parents:
diff changeset
2246 depth = newDepth;
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parents:
diff changeset
2247
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parents:
diff changeset
2248 // Usage at stop:
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parents:
diff changeset
2249 if( deco_usage > 0.0 )
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parents:
diff changeset
2250 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar.
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parents:
diff changeset
2251 * time // in minutes.
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parents:
diff changeset
2252 * deco_usage; // in xxx / min @ 1bar.
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parents:
diff changeset
2253 else
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parents:
diff changeset
2254 volumes[gas] = 65535.0;
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parents:
diff changeset
2255 }
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parents:
diff changeset
2256
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parents:
diff changeset
2257 // From last stop to surface
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parents:
diff changeset
2258 if( deco_usage > 0.0 )
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parents:
diff changeset
2259 volumes[gas] += (depth*0.05 + 1.0) // avg depth --> bar.
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parents:
diff changeset
2260 * depth * 0.1 // time to surface, in minutes.
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parents:
diff changeset
2261 * deco_usage; // in xxx / min @ 1bar.
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parents:
diff changeset
2262
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parents:
diff changeset
2263 //---- convert results for the ASM interface -----------------------------
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parents:
diff changeset
2264 for(i=0; i<NUM_GAS; ++i)
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parents:
diff changeset
2265 if( volumes[i] > 65534.0 )
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parents:
diff changeset
2266 int_O_gas_volumes[i] = 65535;
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parents:
diff changeset
2267 else
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parents:
diff changeset
2268 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5);
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parents:
diff changeset
2269 }
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parents:
diff changeset
2270
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parents:
diff changeset
2271 //////////////////////////////////////////////////////////////////////////////
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parents:
diff changeset
2272
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parents:
diff changeset
2273 void deco_push_tissues_to_vault(void)
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parents:
diff changeset
2274 {
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parents:
diff changeset
2275 overlay unsigned char x;
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parents:
diff changeset
2276 RESET_C_STACK
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parents:
diff changeset
2277
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parents:
diff changeset
2278 cns_vault = CNS_fraction;
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parents:
diff changeset
2279 low_depth_vault = low_depth;
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parents:
diff changeset
2280
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parents:
diff changeset
2281 for (x=0;x<NUM_COMP;x++)
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parents:
diff changeset
2282 {
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parents:
diff changeset
2283 pres_tissue_N2_vault[x] = pres_tissue_N2[x];
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parents:
diff changeset
2284 pres_tissue_He_vault[x] = pres_tissue_He[x];
heinrichsweikamp
parents:
diff changeset
2285 }
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parents:
diff changeset
2286 }
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parents:
diff changeset
2287
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parents:
diff changeset
2288 void deco_pull_tissues_from_vault(void)
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parents:
diff changeset
2289 {
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parents:
diff changeset
2290 overlay unsigned char x;
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parents:
diff changeset
2291 RESET_C_STACK
heinrichsweikamp
parents:
diff changeset
2292
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parents:
diff changeset
2293 for (x=0; x<NUM_COMP; x++)
heinrichsweikamp
parents:
diff changeset
2294 {
heinrichsweikamp
parents:
diff changeset
2295 pres_tissue_N2[x] = pres_tissue_N2_vault[x];
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parents:
diff changeset
2296 pres_tissue_He[x] = pres_tissue_He_vault[x];
heinrichsweikamp
parents:
diff changeset
2297 }
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parents:
diff changeset
2298
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parents:
diff changeset
2299 // Restore both CNS variable, too.
heinrichsweikamp
parents:
diff changeset
2300 CNS_fraction = cns_vault;
heinrichsweikamp
parents:
diff changeset
2301 int_O_CNS_fraction = (unsigned int)(CNS_fraction * 100.0 + 0.5);
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parents:
diff changeset
2302
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parents:
diff changeset
2303 // GF history too:
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parents:
diff changeset
2304 low_depth = low_depth_vault;
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parents:
diff changeset
2305 locked_GF_step = GF_delta / low_depth;
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parents:
diff changeset
2306 }
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parents:
diff changeset
2307
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parents:
diff changeset
2308 //////////////////////////////////////////////////////////////////////////////
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parents:
diff changeset
2309 //
heinrichsweikamp
parents:
diff changeset
2310 #ifndef CROSS_COMPILE
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parents:
diff changeset
2311 void main() {}
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parents:
diff changeset
2312 #endif