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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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87 //
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88 // TODO:
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89 //
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90 // Literature:
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91 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002];
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92 // 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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93 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html
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94 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf
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95 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops"
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96 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf
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97 //
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98 //
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99
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100 // *********************
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101 // ** I N C L U D E S **
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102 // *********************
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103 #include <math.h>
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104
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105 // ***********************************************
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106 // ** V A R I A B L E S D E F I N I T I O N S **
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107 // ***********************************************
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108
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109 #include "p2_definitions.h"
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110 #define TEST_MAIN
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111 #include "shared_definitions.h"
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112
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113 // Water vapour partial pressure in the lumb.
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114 #define ppWater 0.0627
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115 #define METER_TO_BAR 0.09985
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116 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR)
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117
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118 // Surface security factor
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119 #define SURFACE_DESAT_FACTOR 0.7042
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120
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121 // *************************
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122 // ** P R O T O T Y P E S **
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123 // *************************
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124
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125 static void calc_hauptroutine(void);
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126 static void calc_nullzeit(void);
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127
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128 static void calc_tissue(PARAMETER unsigned char period);
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129 static void calc_limit(void);
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130
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131 static void clear_tissue(void);
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132 static void calc_ascenttime(void);
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133 static void update_startvalues(void);
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134 static void clear_deco_table(void);
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135 static unsigned char update_deco_table(void);
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136
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137 static void sim_tissue(PARAMETER unsigned char period);
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138 static void sim_limit(PARAMETER float GF_current);
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139 static void sim_extra_time(void);
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140 static void calc_dive_interval(void);
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141
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142 static void calc_gradient_factor(void);
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143 static void calc_wo_deco_step_1_min(void);
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144
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145 static void calc_hauptroutine_data_input(void);
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146 static void calc_hauptroutine_update_tissues(void);
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147 static void calc_hauptroutine_calc_deco(void);
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148 static void sim_ascent_to_first_stop(void);
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149
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150 static unsigned char gas_switch_deepest(void);
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151 static void gas_switch_set(void);
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152
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153 static unsigned char calc_nextdecodepth(void);
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154
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155 //---- Bank 5 parameters -----------------------------------------------------
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156 #ifndef UNIX
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157 # pragma udata bank5=0x500
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158 #endif
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159
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160 static float GF_low;
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161 static float GF_high;
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162 static float GF_delta;
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163 static float locked_GF_step; // GF_delta / low_depth
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164
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165 static unsigned char temp_depth_limit;
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166 static unsigned char low_depth; // Depth of deepest stop
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167
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168 // Simulation context: used to predict ascent.
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169 static unsigned char sim_lead_tissue_no; // Leading compatiment number.
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170 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure.
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171
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172 // Real context: what we are doing now.
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173 static float calc_lead_tissue_limit; //
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174
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175 static unsigned char internal_deco_time[NUM_STOPS];
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176 static unsigned char internal_deco_depth[NUM_STOPS];
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177
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178 static float cns_vault;
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179 static float low_depth_vault;
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180 static float pres_tissue_N2_vault[NUM_COMP];
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181 static float pres_tissue_He_vault[NUM_COMP];
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182
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183 //---- Bank 6 parameters -----------------------------------------------------
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184 #ifndef UNIX
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185 # pragma udata bank6=0x600
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186 #endif
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187
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188 static unsigned char ci;
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189 static float pres_respiration;
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190 static float pres_surface;
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191 static float temp_deco;
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192 static float ppN2;
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193 static float ppHe;
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194 static float temp_tissue;
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195 static float N2_ratio; // Breathed gas nitrogen ratio.
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196 static float He_ratio; // Breathed gas helium ratio.
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197 static float var_N2_a; // Bühlmann a, for current N2 tissue.
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198 static float var_N2_b; // Bühlmann b, for current N2 tissue.
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199 static float var_He_a; // Bühlmann a, for current He tissue.
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200 static float var_He_b; // Bühlmann b, for current He tissue.
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201 static float var_N2_e; // Exposition, for current N2 tissue.
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202 static float var_He_e; // Exposition, for current He tissue.
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203 static float var_N2_ht; // Half-time for current N2 tissue.
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204 static float var_He_ht; // Half-time for current N2 tissue.
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205
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206 static float pres_diluent; // new in v.101
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207 static float const_ppO2; // new in v.101
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208
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209 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch.
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210 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch.
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211 static unsigned short sim_dive_mins; // Simulated dive time.
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212 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio.
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213 static float calc_He_ratio; // Simulated (switched) helium ratio.
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214 static float CNS_fraction; // new in v.101
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215 static float float_saturation_multiplier; // new in v.101
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216 static float float_desaturation_multiplier; // new in v.101
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217 static float float_deco_distance; // new in v.101
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218 //static char flag_in_divemode; // new in v.108
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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++;
|
|
|
388 }
|
|
|
389 break;
|
|
|
390
|
|
|
391 case 1: //---- 1 min -----------------------------------------------------
|
|
|
392 {
|
|
|
393 overlay rom const float* ptr = &e1min[2*ci];
|
|
|
394 var_N2_e = *ptr++;
|
|
|
395 var_He_e = *ptr++;
|
|
|
396 }
|
|
|
397 break;
|
|
|
398
|
|
|
399 case 2: //---- 10 min ----------------------------------------------------
|
|
|
400 {
|
|
|
401 overlay rom const float* ptr = &e10min[2*ci];
|
|
|
402 var_N2_e = *ptr++;
|
|
|
403 var_He_e = *ptr++;
|
|
|
404 }
|
|
|
405 break;
|
|
|
406
|
|
|
407 default:
|
|
|
408 assert(0); // Never go there...
|
|
|
409 }
|
|
|
410 }
|
|
|
411
|
|
|
412 //////////////////////////////////////////////////////////////////////////////
|
|
|
413 // read buhlmann tables for compatriment ci
|
|
|
414 //
|
|
|
415 static void read_buhlmann_ht(void)
|
|
|
416 {
|
|
|
417
|
|
|
418 #ifndef CROSS_COMPILE
|
|
|
419 // Note: we don't use far rom pointer, because the
|
|
|
420 // 24 bits is to complex, hence we have to set
|
|
|
421 // the UPPER page ourself...
|
|
|
422 // --> Set zero if tables are moved to lower pages !
|
|
|
423 _asm
|
|
|
424 movlw 1
|
|
|
425 movwf TBLPTRU,0
|
|
|
426 _endasm
|
|
|
427 #endif
|
|
|
428
|
|
|
429 assert( ci < NUM_COMP );
|
|
|
430 {
|
|
|
431 overlay rom const float* ptr = &buhlmann_ht[2*ci];
|
|
|
432 var_N2_ht = *ptr++;
|
|
|
433 var_He_ht = *ptr++;
|
|
|
434 }
|
|
|
435
|
|
|
436 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 );
|
|
|
437 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 );
|
|
|
438 }
|
|
|
439
|
|
|
440 //////////////////////////////////////////////////////////////////////////////
|
|
|
441 // calc_nextdecodepth
|
|
|
442 //
|
|
|
443 // new in v.102
|
|
|
444 //
|
|
|
445 // INPUT, changing during dive:
|
|
|
446 // temp_deco
|
|
|
447 // low_depth
|
|
|
448 //
|
|
|
449 // INPUT, fixed during dive:
|
|
|
450 // pres_surface
|
|
|
451 // GF_delta
|
|
|
452 // GF_high
|
|
|
453 // GF_low
|
|
|
454 // char_I_depth_last_deco
|
|
|
455 // float_deco_distance
|
|
|
456 //
|
|
|
457 // RETURN TRUE iff a stop is needed.
|
|
|
458 //
|
|
|
459 // OUTPUT
|
|
|
460 // locked_GF_step
|
|
|
461 // temp_depth_limt
|
|
|
462 // low_depth
|
|
|
463 //
|
|
|
464 static unsigned char calc_nextdecodepth(void)
|
|
|
465 {
|
|
|
466 //--- Max ascent speed ---------------------------------------------------
|
|
|
467 // Recompute leading gas limit, at current depth:
|
|
|
468 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER;
|
|
|
469
|
|
|
470 // At most, ascent 1 minute, at 10m/min == 10.0 m.
|
|
|
471 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0;
|
|
|
472
|
|
|
473 // Do we need to stop at current depth ?
|
|
|
474 overlay unsigned char need_stop = 0;
|
|
|
475
|
|
|
476 assert( depth >= -0.2 ); // Allow for 200mbar of weather change.
|
|
|
477
|
|
|
478 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------
|
|
|
479 if( char_I_deco_model != 0 )
|
|
|
480 {
|
|
|
481 overlay unsigned char first_stop = 0;
|
|
|
482 overlay float p;
|
|
|
483
|
|
|
484 sim_limit( GF_low );
|
|
|
485 p = sim_lead_tissue_limit - pres_surface;
|
|
|
486 if( p <= 0.0f )
|
|
|
487 goto no_deco_stop; // We can surface directly...
|
|
|
488
|
|
|
489 p *= BAR_TO_METER;
|
|
|
490 if( p < min_depth )
|
|
|
491 goto no_deco_stop; // First stop is higher than 1' ascent.
|
|
|
492
|
|
|
493 first_stop = 3 * (short)(0.99999 + p*0.333333);
|
|
|
494 assert( first_stop < 128 );
|
|
|
495
|
|
|
496 // Apply correction for the shallowest stop.
|
|
|
497 if( first_stop == 3 ) // new in v104
|
|
|
498 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead.
|
|
|
499
|
|
|
500 // Store the deepest point needing a deco stop as the LOW reference for GF.
|
|
|
501 // NOTE: following stops will be validated using this LOW-HIGH gf scale,
|
|
|
502 // so if we want to keep coherency, we should not validate this stop
|
|
|
503 // yet, but apply the search to it, as for all the following stops afterward.
|
|
|
504 if( first_stop > low_depth )
|
|
|
505 {
|
|
|
506 low_depth = first_stop;
|
|
|
507 locked_GF_step = GF_delta / first_stop;
|
|
|
508 }
|
|
|
509
|
|
|
510 // We have a stop candidate.
|
|
|
511 // But maybe ascending to the next stop will diminish the constraint,
|
|
|
512 // because the GF might decrease more than the preassure gradient...
|
|
|
513 while(first_stop > 0)
|
|
|
514 {
|
|
|
515 overlay unsigned char next_stop; // Next depth (0..90m)
|
|
|
516 overlay float pres_stop; // Next pressure (bar)
|
|
|
517
|
|
|
518 // Check max speed, or reaching surface.
|
|
|
519 if( first_stop <= min_depth )
|
|
|
520 goto no_deco_stop;
|
|
|
521
|
|
|
522 if( first_stop <= char_I_depth_last_deco ) // new in v104
|
|
|
523 next_stop = 0;
|
|
|
524 else if( first_stop == 6 )
|
|
|
525 next_stop = char_I_depth_last_deco;
|
|
|
526 else
|
|
|
527 next_stop = first_stop - 3; // Index of next (upper) stop.
|
|
|
528
|
|
|
529 // Just a check we are indeed above LOW ref.
|
|
|
530 assert( next_stop < low_depth );
|
|
|
531
|
|
|
532 // Total preassure at the new stop candidate:
|
|
|
533 pres_stop = next_stop * METER_TO_BAR
|
|
|
534 + pres_surface;
|
|
|
535
|
|
|
536 // Keep GF_low until a first stop depth is found:
|
|
|
537 sim_limit( GF_high - next_stop * locked_GF_step );
|
|
|
538
|
|
|
539 // Check upper limit (lowest pressure tolerated):
|
|
|
540 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok
|
|
|
541 goto deco_stop_found;
|
|
|
542
|
|
|
543 // Else, validate that stop and loop...
|
|
|
544 first_stop = next_stop;
|
|
|
545 }
|
|
|
546 assert( first_stop == 0 );
|
|
|
547
|
|
|
548 no_deco_stop:
|
|
|
549 temp_depth_limit = min_depth;
|
|
|
550 goto done;
|
|
|
551
|
|
|
552 // next stop is the last validated depth found, aka first_stop
|
|
|
553 deco_stop_found:
|
|
|
554 need_stop = 1; // Hit.
|
|
|
555 temp_depth_limit = first_stop; // Stop depth, in meter.
|
|
|
556
|
|
|
557 done:
|
|
|
558 ;
|
|
|
559 }
|
|
|
560 else //---- ZH-L16 model -------------------------------------------------
|
|
|
561 {
|
|
|
562 overlay float pres_gradient;
|
|
|
563
|
|
|
564 // Original model
|
|
|
565 // optimized in v.101
|
|
|
566 // char_I_depth_last_deco included in v.101
|
|
|
567
|
|
|
568 // Compute sim_lead_tissue_limit too, but just once.
|
|
|
569 sim_limit(1.0);
|
|
|
570
|
|
|
571 pres_gradient = sim_lead_tissue_limit - pres_surface;
|
|
|
572 if (pres_gradient >= 0)
|
|
|
573 {
|
|
|
574 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number;
|
|
|
575 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco
|
|
|
576 need_stop = 1; // Hit.
|
|
|
577
|
|
|
578 // Implement last stop at 4m/5m/6m...
|
|
|
579 if( temp_depth_limit == 3 )
|
|
|
580 temp_depth_limit = char_I_depth_last_deco;
|
|
|
581 }
|
|
|
582 else
|
|
|
583 temp_depth_limit = 0;
|
|
|
584 }
|
|
|
585
|
|
|
586 //---- Check gas change --------------------------------------------------
|
|
|
587 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change,
|
|
|
588
|
|
|
589 return need_stop;
|
|
|
590 }
|
|
|
591
|
|
|
592 //////////////////////////////////////////////////////////////////////////////
|
|
|
593 // copy_deco_table
|
|
|
594 //
|
|
|
595 // Buffer the stops, once computed, so we can continue to display them
|
|
|
596 // while computing the next set.
|
|
|
597 //
|
|
|
598 static void copy_deco_table(void)
|
|
|
599 {
|
|
|
600 // Copy depth of the first (deepest) stop, because when reversing
|
|
|
601 // order, it will be hard to find...
|
|
|
602 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F;
|
|
|
603 char_O_first_deco_time = internal_deco_time [0];
|
|
|
604
|
|
|
605 {
|
|
|
606 overlay unsigned char x, y;
|
|
|
607
|
|
|
608 for(x=0; x<NUM_STOPS; x++)
|
|
|
609 {
|
|
|
610 char_O_deco_depth[x] = internal_deco_depth[x];
|
|
|
611 char_O_deco_time [x] = internal_deco_time [x];
|
|
|
612 }
|
|
|
613
|
|
|
614 //Now fill the char_O_deco_time_for_log array
|
|
|
615 //---- First: search the first non-null depth
|
|
|
616 for(x=(NUM_STOPS-1); x != 0; --x)
|
|
|
617 if( internal_deco_depth[x] != 0 ) break;
|
|
|
618
|
|
|
619 //---- Second: copy to output table (in reverse order)
|
|
|
620 for(y=0; y<NUM_STOPS; y++, --x)
|
|
|
621 {
|
|
|
622 char_O_deco_time_for_log[y] = internal_deco_time [x];
|
|
|
623
|
|
|
624 // Stop only once the last transfer is done.
|
|
|
625 if( x == 0 ) break;
|
|
|
626 }
|
|
|
627
|
|
|
628 //---- Third: fill table end with null
|
|
|
629 for(y++; y<NUM_STOPS; y++)
|
|
|
630 {
|
|
|
631 char_O_deco_time_for_log [y] = 0;
|
|
|
632 }
|
|
|
633 }
|
|
|
634 }
|
|
|
635
|
|
|
636 //////////////////////////////////////////////////////////////////////////////
|
|
|
637 // temp_tissue_safety //
|
|
|
638 //
|
|
|
639 // outsourced in v.102
|
|
|
640 //
|
|
|
641 // Apply safety factors for brand ZH-L16 model.
|
|
|
642 //
|
|
|
643 static void temp_tissue_safety(void)
|
|
|
644 {
|
|
|
645 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 );
|
|
|
646 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 );
|
|
|
647
|
|
|
648 if( char_I_deco_model == 0 )
|
|
|
649 {
|
|
|
650 if( temp_tissue < 0.0 )
|
|
|
651 temp_tissue *= float_desaturation_multiplier;
|
|
|
652 else
|
|
|
653 temp_tissue *= float_saturation_multiplier;
|
|
|
654 }
|
|
|
655 }
|
|
|
656
|
|
|
657 //////////////////////////////////////////////////////////////////////////////
|
|
|
658 //////////////////////////////////////////////////////////////////////////////
|
|
|
659 // ** THE JUMP-IN CODE **
|
|
|
660 // ** for the asm code **
|
|
|
661 //////////////////////////////////////////////////////////////////////////////
|
|
|
662 //////////////////////////////////////////////////////////////////////////////
|
|
|
663
|
|
|
664 //////////////////////////////////////////////////////////////////////////////
|
|
|
665 // Called every 2 seconds during diving.
|
|
|
666 // update tissues every time.
|
|
|
667 //
|
|
|
668 // Every 6 seconds (or slower when TTS > 16):
|
|
|
669 // - update deco table (char_O_deco_time/depth) with new values.
|
|
|
670 // - update ascent time,
|
|
|
671 // - set status to zero (so we can check there is new results).
|
|
|
672 //
|
|
|
673 void deco_calc_hauptroutine(void)
|
|
|
674 {
|
|
|
675 RESET_C_STACK
|
|
|
676 calc_hauptroutine();
|
|
|
677 int_O_desaturation_time = 65535;
|
|
|
678 }
|
|
|
679
|
|
|
680 //////////////////////////////////////////////////////////////////////////////
|
|
|
681 // Reset decompression model:
|
|
|
682 // + Set all tissues to equilibrium with Air at ambient pressure.
|
|
|
683 // + Reset last stop to 0m
|
|
|
684 // + Reset all model output.
|
|
|
685 void deco_clear_tissue(void)
|
|
|
686 {
|
|
|
687 RESET_C_STACK
|
|
|
688 clear_tissue();
|
|
|
689 }
|
|
|
690
|
|
|
691 //////////////////////////////////////////////////////////////////////////////
|
|
|
692 // Called every 1 min during decoplanning.
|
|
|
693 // Update tissues for 1 min.
|
|
|
694 //
|
|
|
695 void deco_calc_tissue(void)
|
|
|
696 {
|
|
|
697 RESET_C_STACK
|
|
|
698 calc_hauptroutine_update_tissues();
|
|
|
699 }
|
|
|
700
|
|
|
701 //////////////////////////////////////////////////////////////////////////////
|
|
|
702
|
|
|
703 void deco_calc_wo_deco_step_1_min(void)
|
|
|
704 {
|
|
|
705 RESET_C_STACK
|
|
|
706 calc_wo_deco_step_1_min();
|
|
|
707 deco_calc_desaturation_time();
|
|
|
708 }
|
|
|
709
|
|
|
710 //////////////////////////////////////////////////////////////////////////////
|
|
|
711
|
|
|
712 void deco_calc_dive_interval(void)
|
|
|
713 {
|
|
|
714 RESET_C_STACK
|
|
|
715 calc_dive_interval();
|
|
|
716 }
|
|
|
717
|
|
|
718 //////////////////////////////////////////////////////////////////////////////
|
|
|
719 // Find current gas in the list (if any).
|
|
|
720 //
|
|
|
721 // Input: char_I_current_gas = 1..6
|
|
|
722 //
|
|
|
723 // Output: sim_gas_last_depth = 0..5, temp_depth_limit.
|
|
|
724 //
|
|
|
725 static void gas_switch_find_current(void)
|
|
|
726 {
|
|
|
727 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) );
|
|
|
728
|
|
|
729 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5
|
|
|
730 {
|
|
|
731 sim_gas_last_used = char_I_current_gas;
|
|
|
732
|
|
|
733 // Note: if current is first gas, we must find it, but not set
|
|
|
734 // last depth change to surface.
|
|
|
735 if( char_I_deco_gas_change[sim_gas_last_used-1] )
|
|
|
736 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1];
|
|
|
737 }
|
|
|
738 else
|
|
|
739 sim_gas_last_used = 0; // Gas 6 = manual set
|
|
|
740 }
|
|
|
741
|
|
|
742 //////////////////////////////////////////////////////////////////////////////
|
|
|
743 // Find deepest available gas.
|
|
|
744 //
|
|
|
745 // Input: temp_depth_limit,
|
|
|
746 // deco_gas_change[]
|
|
|
747 // sim_gas_depth_used, sim_dive_mins.
|
|
|
748 //
|
|
|
749 // RETURNS TRUE if a stop is needed for gas switch.
|
|
|
750 //
|
|
|
751 // Output: temp_depth_limit, sim_gas_depth_used IFF the is a switch.
|
|
|
752 //
|
|
|
753 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used
|
|
|
754 // are null), or during the ascent to make sure we are not passing a
|
|
|
755 // stop (in which case both can be already set).
|
|
|
756 //
|
|
|
757 static unsigned char gas_switch_deepest(void)
|
|
|
758 {
|
|
|
759 overlay unsigned char switch_deco = 0, switch_last = 0;
|
|
|
760
|
|
|
761 if (char_I_const_ppO2 == 0)
|
|
|
762 {
|
|
|
763 overlay unsigned char j;
|
|
|
764
|
|
|
765 // Loop over all enabled gas, to find the deepest one,
|
|
|
766 // above last used gas, but below temp_depth_limit.
|
|
|
767 for(j=0; j<NUM_GAS; ++j)
|
|
|
768 {
|
|
|
769 // Gas not (yet) allowed ? Skip !
|
|
|
770 if( temp_depth_limit > deco_gas_change[j] )
|
|
|
771 continue;
|
|
|
772
|
|
|
773 // Gas deeper (or equal) than the current one ? Skip !
|
|
|
774 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth )
|
|
|
775 continue;
|
|
|
776
|
|
|
777 // First, or deeper ?
|
|
|
778 if( switch_deco < deco_gas_change[j] )
|
|
|
779 {
|
|
|
780 switch_deco = deco_gas_change[j];
|
|
|
781 switch_last = j+1; // 1..5
|
|
|
782 }
|
|
|
783 }
|
|
|
784 }
|
|
|
785
|
|
|
786 // If there is a better gas available
|
|
|
787 if( switch_deco )
|
|
|
788 {
|
|
|
789 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco );
|
|
|
790
|
|
|
791 sim_gas_last_depth = switch_deco;
|
|
|
792 sim_gas_last_used = switch_last;
|
|
|
793 return 0;
|
|
|
794 }
|
|
|
795 return 0;
|
|
|
796 }
|
|
|
797
|
|
|
798 //////////////////////////////////////////////////////////////////////////////
|
|
|
799 // Calculate gas switches
|
|
|
800 //
|
|
|
801 //
|
|
|
802 // Input: N2_ratio, He_ratio.
|
|
|
803 // sim_gas_last_used
|
|
|
804 //
|
|
|
805 // Output: calc_N2_ratio, calc_He_ratio
|
|
|
806 //
|
|
|
807 static void gas_switch_set(void)
|
|
|
808 {
|
|
|
809 assert( sim_gas_last_used <= NUM_GAS );
|
|
|
810
|
|
|
811 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas.
|
|
|
812 {
|
|
|
813 calc_N2_ratio = N2_ratio;
|
|
|
814 calc_He_ratio = He_ratio;
|
|
|
815 }
|
|
|
816 else
|
|
|
817 {
|
|
|
818 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01;
|
|
|
819 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01;
|
|
|
820 }
|
|
|
821
|
|
|
822 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 );
|
|
|
823 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 );
|
|
|
824 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 );
|
|
|
825 }
|
|
|
826
|
|
|
827 //////////////////////////////////////////////////////////////////////////////
|
|
|
828 //
|
|
|
829 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix.
|
|
|
830 // temp_deco : simulated respiration pressure
|
|
|
831 // float_deco_distance : security factor.
|
|
|
832 // Water-vapor pressure inside limbs (ppWater).
|
|
|
833 //
|
|
|
834 // Output: ppN2, ppHe.
|
|
|
835 //
|
|
|
836 static void sim_alveolar_presures(void)
|
|
|
837 {
|
|
|
838 overlay float deco_diluent = temp_deco; // new in v.101
|
|
|
839
|
|
|
840 // Take deco offset into account, but not at surface.
|
|
|
841 // Note: this should be done on ambiant pressure, hence before
|
|
|
842 // computing the diluant partial pressure...
|
|
|
843 if( deco_diluent > pres_surface )
|
|
|
844 deco_diluent += float_deco_distance;
|
|
|
845
|
|
|
846 //---- CCR mode : deco gas switch ? --------------------------------------
|
|
|
847 if( char_I_const_ppO2 != 0 )
|
|
|
848 {
|
|
|
849 // In CCR mode, use calc_XX_ratio instead of XX_ratio.
|
|
|
850 // Note: PPO2 and ratios are known outside the lumbs, so there is no
|
|
|
851 // ppWater in the equations below:
|
|
|
852 deco_diluent -= const_ppO2;
|
|
|
853 deco_diluent /= calc_N2_ratio + calc_He_ratio;
|
|
|
854
|
|
|
855 if (deco_diluent > temp_deco)
|
|
|
856 deco_diluent = temp_deco;
|
|
|
857 }
|
|
|
858
|
|
|
859 if( deco_diluent > ppWater )
|
|
|
860 {
|
|
|
861 ppN2 = calc_N2_ratio * (deco_diluent - ppWater);
|
|
|
862 ppHe = calc_He_ratio * (deco_diluent - ppWater);
|
|
|
863 }
|
|
|
864 else
|
|
|
865 {
|
|
|
866 ppN2 = 0.0;
|
|
|
867 ppHe = 0.0;
|
|
|
868 }
|
|
|
869 assert( 0.0 <= ppN2 && ppN2 < 14.0 );
|
|
|
870 assert( 0.0 <= ppHe && ppHe < 14.0 );
|
|
|
871 }
|
|
|
872
|
|
|
873 //////////////////////////////////////////////////////////////////////////////
|
|
|
874 // clear_tissue
|
|
|
875 //
|
|
|
876 // optimized in v.101 (var_N2_a)
|
|
|
877 //
|
|
|
878 // preload tissues with standard pressure for the given ambient pressure.
|
|
|
879 // Note: fixed N2_ratio for standard air.
|
|
|
880 //
|
|
|
881 static void clear_tissue(void)
|
|
|
882 {
|
|
|
883 overlay float p;
|
|
|
884
|
|
|
885 // Kludge: the 0.0002 of 0.7902 are missing with standard air.
|
|
|
886 N2_ratio = 0.7902;
|
|
|
887 pres_respiration = int_I_pres_respiration * 0.001;
|
|
|
888
|
|
|
889 p = N2_ratio * (pres_respiration - ppWater);
|
|
|
890 for(ci=0; ci<NUM_COMP; ci++)
|
|
|
891 {
|
|
|
892 // cycle through the 16 Bühlmann N2 tissues
|
|
|
893 pres_tissue_N2[ci] = p;
|
|
|
894
|
|
|
895 // cycle through the 16 Bühlmann tissues for Helium
|
|
|
896 pres_tissue_He[ci] = 0.0;
|
|
|
897 }
|
|
|
898
|
|
|
899 clear_deco_table();
|
|
|
900 // flag_in_divemode = 0;
|
|
|
901 char_O_deco_status = 0;
|
|
|
902 char_O_nullzeit = 0;
|
|
|
903 int_O_ascenttime = 0;
|
|
|
904 char_O_gradient_factor = 0;
|
|
|
905 char_O_relative_gradient_GF = 0;
|
|
|
906
|
|
|
907 calc_lead_tissue_limit = 0.0;
|
|
|
908 char_O_gtissue_no = 0;
|
|
|
909 }
|
|
|
910
|
|
|
911 //////////////////////////////////////////////////////////////////////////////
|
|
|
912 // calc_hauptroutine
|
|
|
913 //
|
|
|
914 // this is the major code in dive mode calculates:
|
|
|
915 // the tissues,
|
|
|
916 // the bottom time,
|
|
|
917 // and simulates the ascend with all deco stops.
|
|
|
918 //
|
|
|
919 // The deco_state sequence is :
|
|
|
920 // 3 (at surface)
|
|
|
921 // +---> 0 : calc nullzeit
|
|
|
922 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu)
|
|
|
923 // | +-> 1 : simulate up to 16min of stops.
|
|
|
924 // | +------< not finished
|
|
|
925 // +--------< finish
|
|
|
926 //
|
|
|
927 // Added steps 6,5 for @+5 calculation:
|
|
|
928 // 6 = ascent to first stop (same as 2), except continue to 7
|
|
|
929 // 7 = same as 1, except loop to 7.
|
|
|
930 //
|
|
|
931 static void calc_hauptroutine(void)
|
|
|
932 {
|
|
|
933 static unsigned char backup_gas_used;
|
|
|
934 static unsigned char backup_gas_depth;
|
|
|
935
|
|
|
936 calc_hauptroutine_data_input();
|
|
|
937
|
|
|
938 calc_hauptroutine_update_tissues();
|
|
|
939 calc_gradient_factor();
|
|
|
940
|
|
|
941 // toggle between calculation for nullzeit (bottom time),
|
|
|
942 // deco stops
|
|
|
943 // and more deco stops (continue)
|
|
|
944 switch( char_O_deco_status )
|
|
|
945 {
|
|
|
946 case 3: //---- At surface: start a new dive ------------------------------
|
|
|
947 clear_deco_table();
|
|
|
948 copy_deco_table();
|
|
|
949 int_O_ascenttime = 0; // Reset DTR.
|
|
|
950 int_O_extra_ascenttime = 0;
|
|
|
951 char_O_nullzeit = 0; // Reset bottom time.
|
|
|
952 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration.
|
|
|
953
|
|
|
954 // Values that should be reset just once for the full real dive.
|
|
|
955 // This is used to record the lowest stop for the whole dive,
|
|
|
956 // Including ACCROSS all simulated ascent.
|
|
|
957 low_depth = 0;
|
|
|
958 locked_GF_step = 0.0;
|
|
|
959
|
|
|
960 // Reset gas switch history.
|
|
|
961 backup_gas_used = sim_gas_last_used = 0;
|
|
|
962 backup_gas_depth = sim_gas_last_depth = 0;
|
|
|
963 sim_dive_mins = 0;
|
|
|
964 break;
|
|
|
965
|
|
|
966 case 0: //---- bottom time -----------------------------------------------
|
|
|
967 default:
|
|
|
968 gas_switch_find_current(); // Lookup for current gas & time.
|
|
|
969 gas_switch_set(); // setup calc_ratio's
|
|
|
970
|
|
|
971 calc_nullzeit();
|
|
|
972 if( char_O_nullzeit > 0 ) // Some NDL time left ?
|
|
|
973 {
|
|
|
974 char_O_deco_status = 0; // YES: recalc ndl next time.
|
|
|
975 clear_deco_table(); // Also clear stops !
|
|
|
976 copy_deco_table();
|
|
|
977 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim)
|
|
|
978 }
|
|
|
979 else
|
|
|
980 char_O_deco_status = 2; // NO: calc ascent next time.
|
|
|
981 break;
|
|
|
982
|
|
|
983 case 2: //---- Simulate ascent to first stop -----------------------------
|
|
|
984 case 6: // @+5min variation
|
|
|
985 // Check proposed gas at begin of ascent simulation
|
|
|
986 sim_dive_mins = int_I_divemins; // Init current time.
|
|
|
987
|
|
|
988 gas_switch_find_current(); // Lookup for current gas & time.
|
|
|
989 gas_switch_set(); // setup calc_ratio's
|
|
|
990
|
|
|
991 backup_gas_used = sim_gas_last_used; // And save for later simu steps.
|
|
|
992 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps.
|
|
|
993
|
|
|
994 sim_ascent_to_first_stop();
|
|
|
995
|
|
|
996 // Calc stops next time (deco or gas switch).
|
|
|
997 char_O_deco_status = 1 | ( char_O_deco_status & 4 );
|
|
|
998 break;
|
|
|
999
|
|
|
1000 case 1: //---- Simulate stops --------------------------------------------
|
|
|
1001 case 5: // @+5 variation.
|
|
|
1002 calc_hauptroutine_calc_deco();
|
|
|
1003
|
|
|
1004 // If simulation is finished, restore the GF low reference, so that
|
|
|
1005 // next ascent simulation is done from the current depth:
|
|
|
1006 if( (char_O_deco_status & 3) == 0 )
|
|
|
1007 {
|
|
|
1008 sim_gas_last_used = backup_gas_used;
|
|
|
1009 sim_gas_last_depth = backup_gas_depth;
|
|
|
1010 }
|
|
|
1011 break;
|
|
|
1012 }
|
|
|
1013 }
|
|
|
1014
|
|
|
1015 //////////////////////////////////////////////////////////////////////////////
|
|
|
1016 // calc_hauptroutine_data_input
|
|
|
1017 //
|
|
|
1018 // Reset all C-code dive parameters from their ASM-code values.
|
|
|
1019 // Detect gas change condition.
|
|
|
1020 //
|
|
|
1021 void calc_hauptroutine_data_input(void)
|
|
|
1022 {
|
|
|
1023 overlay short int_temp;
|
|
|
1024 overlay unsigned char g;
|
|
|
1025
|
|
|
1026 pres_respiration = int_I_pres_respiration * 0.001;
|
|
|
1027 pres_surface = int_I_pres_surface * 0.001;
|
|
|
1028 N2_ratio = char_I_N2_ratio * 0.01;
|
|
|
1029 He_ratio = char_I_He_ratio * 0.01;
|
|
|
1030 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar.
|
|
|
1031
|
|
|
1032 // ____________________________________________________
|
|
|
1033 //
|
|
|
1034 // _____________ G A S _ C H A N G E S ________________
|
|
|
1035 // ____________________________________________________
|
|
|
1036
|
|
|
1037 // Keep a margin of 150mbar = 1.50m
|
|
|
1038 int_temp = (int_I_pres_respiration - int_I_pres_surface)
|
|
|
1039 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF;
|
|
|
1040
|
|
|
1041 // Gas are selectable if we did not pass the change depth by more than 1.50m:
|
|
|
1042 for(g=0; g < NUM_GAS; ++g)
|
|
|
1043 {
|
|
|
1044 deco_gas_change[g] = 0;
|
|
|
1045 if(char_I_deco_gas_change[g])
|
|
|
1046 if( int_temp > 100 *(short)char_I_deco_gas_change[g] )
|
|
|
1047 deco_gas_change[g] = char_I_deco_gas_change[g];
|
|
|
1048 }
|
|
|
1049
|
|
|
1050 const_ppO2 = char_I_const_ppO2 * 0.01;
|
|
|
1051 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01;
|
|
|
1052 float_saturation_multiplier = char_I_saturation_multiplier * 0.01;
|
|
|
1053 GF_low = char_I_GF_Low_percentage * 0.01;
|
|
|
1054 GF_high = char_I_GF_High_percentage * 0.01;
|
|
|
1055 GF_delta = GF_high - GF_low;
|
|
|
1056 }
|
|
|
1057
|
|
|
1058 //////////////////////////////////////////////////////////////////////////////
|
|
|
1059 //
|
|
|
1060 //
|
|
|
1061 void calc_hauptroutine_update_tissues(void)
|
|
|
1062 {
|
|
|
1063 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 );
|
|
|
1064 assert( 0.00 <= He_ratio && He_ratio <= 1.00 );
|
|
|
1065 assert( (N2_ratio + He_ratio) <= 0.95 );
|
|
|
1066 assert( 0.800 < pres_respiration && pres_respiration < 14.0 );
|
|
|
1067
|
|
|
1068 pres_diluent = pres_respiration;
|
|
|
1069 if( char_I_const_ppO2 != 0 )
|
|
|
1070 {
|
|
|
1071 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio);
|
|
|
1072
|
|
|
1073 pres_diluent -= const_ppO2;
|
|
|
1074 pres_diluent /= N2_ratio + He_ratio;
|
|
|
1075 if( pres_diluent < 0.0 )
|
|
|
1076 pres_diluent = 0.0;
|
|
|
1077 if( pres_diluent > pres_respiration )
|
|
|
1078 pres_diluent = pres_respiration;
|
|
|
1079
|
|
|
1080 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5);
|
|
|
1081
|
|
|
1082 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55;
|
|
|
1083 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0;
|
|
|
1084 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5);
|
|
|
1085 }
|
|
|
1086
|
|
|
1087 if( pres_diluent > ppWater )
|
|
|
1088 {
|
|
|
1089 overlay float EAD, END;
|
|
|
1090
|
|
|
1091 ppN2 = N2_ratio * (pres_diluent - ppWater);
|
|
|
1092 ppHe = He_ratio * (pres_diluent - ppWater);
|
|
|
1093
|
|
|
1094 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level
|
|
|
1095 // with plain air.
|
|
|
1096 // ppN2 = 79% * (P_EAD - ppWater)
|
|
|
1097 // EAD = (P_EAD - Psurface) * 10
|
|
|
1098 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10
|
|
|
1099 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER;
|
|
|
1100 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0;
|
|
|
1101 char_O_EAD = (unsigned char)(EAD + 0.5);
|
|
|
1102
|
|
|
1103 // END : Equivalent Narcotic Dive.
|
|
|
1104 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of
|
|
|
1105 // 0.23 btw). Hence the formula becomes:
|
|
|
1106 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater
|
|
|
1107 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER
|
|
|
1108 //
|
|
|
1109 // Source cited:
|
|
|
1110 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott,
|
|
|
1111 // 4th edition, 1993, W.B.Saunders Company Ltd, London.
|
|
|
1112 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER;
|
|
|
1113 if( END < 0.0 || END > 245.5 ) END = 0.0;
|
|
|
1114 char_O_END = (unsigned char)(END + 0.5);
|
|
|
1115 }
|
|
|
1116 else // new in v.101
|
|
|
1117 {
|
|
|
1118 ppN2 = 0.0;
|
|
|
1119 ppHe = 0.0;
|
|
|
1120 char_O_EAD = char_O_END = 0;
|
|
|
1121 }
|
|
|
1122
|
|
|
1123 if(!char_I_step_is_1min)
|
|
|
1124 calc_tissue(0);
|
|
|
1125 else
|
|
|
1126 calc_tissue(1);
|
|
|
1127
|
|
|
1128 // Calc limit for surface, ie. GF_high.
|
|
|
1129 calc_limit();
|
|
|
1130
|
|
|
1131 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000);
|
|
|
1132 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000);
|
|
|
1133 }
|
|
|
1134
|
|
|
1135
|
|
|
1136 //////////////////////////////////////////////////////////////////////////////
|
|
|
1137 // Compute stops.
|
|
|
1138 //
|
|
|
1139 // Note: because this can be very long, break on 16 iterations, and set state
|
|
|
1140 // to 0 when finished, or to 1 when needing to continue.
|
|
|
1141 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta),
|
|
|
1142 // break the loop when total time > 512msec.
|
|
|
1143 //
|
|
|
1144 void calc_hauptroutine_calc_deco(void)
|
|
|
1145 {
|
|
|
1146 overlay unsigned char loop;
|
|
|
1147
|
|
|
1148 for(loop = 0; loop < 32; ++loop)
|
|
|
1149 {
|
|
|
1150 // Limit loops to 512ms, using timer 5:
|
|
|
1151 if( tmr5() & (512*32) )
|
|
|
1152 break;
|
|
|
1153 // Do not ascent while doing a gas switch ?
|
|
|
1154 if( calc_nextdecodepth() )
|
|
|
1155 {
|
|
|
1156 if( temp_depth_limit == 0 )
|
|
|
1157 goto Surface;
|
|
|
1158
|
|
|
1159 //---- We hit a stop at temp_depth_limit ---------------------
|
|
|
1160 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar,
|
|
|
1161 + pres_surface; // To absolute.
|
|
|
1162 if( !update_deco_table() ) // Adds a one minute stops.
|
|
|
1163 goto Surface; // Deco table full: abort...
|
|
|
1164 }
|
|
|
1165 else
|
|
|
1166 {
|
|
|
1167 //---- No stop -----------------------------------------------
|
|
|
1168 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait.
|
|
|
1169
|
|
|
1170 //---- Finish computations once surface is reached -----------
|
|
|
1171 if( temp_deco <= pres_surface )
|
|
|
1172 {
|
|
|
1173 Surface:
|
|
|
1174 if( char_O_deco_status == 1 ) // Don't in @+5min variant.
|
|
|
1175 copy_deco_table();
|
|
|
1176
|
|
|
1177 calc_ascenttime();
|
|
|
1178 char_O_deco_status = 0; // calc nullzeit next time.
|
|
|
1179 char_O_deco_last_stop = 0; // Surface reached (to animate menu)
|
|
|
1180 return;
|
|
|
1181 }
|
|
|
1182 }
|
|
|
1183 //---- Then update tissue --------------------------------------------
|
|
|
1184 sim_dive_mins++; // Advance simulated time by 1 minute.
|
|
|
1185 gas_switch_set(); // Apply any simulated gas change, once validated.
|
|
|
1186 sim_alveolar_presures(); // Updates ppN2 and ppHe.
|
|
|
1187 sim_tissue(1); // Simulate compartiments for 1 minute.
|
|
|
1188 }
|
|
|
1189
|
|
|
1190 // Surface not reached, need more stops... for menu animation.
|
|
|
1191 char_O_deco_last_stop = temp_depth_limit; // Reached depth.
|
|
|
1192 }
|
|
|
1193
|
|
|
1194
|
|
|
1195 //////////////////////////////////////////////////////////////////////////////
|
|
|
1196 // Simulation ascention to first deco stop.
|
|
|
1197 //
|
|
|
1198 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn),
|
|
|
1199 // there is no need to break on more that 16 iterations
|
|
|
1200 // (or we are already in deep shit).
|
|
|
1201 //
|
|
|
1202 // Input: pres_respiration
|
|
|
1203 // Output: temp_deco
|
|
|
1204 //
|
|
|
1205 // if char_O_deco_status indicate @+5 variant, add extra time at current depth,
|
|
|
1206 // before ascent.
|
|
|
1207 void sim_ascent_to_first_stop(void)
|
|
|
1208 {
|
|
|
1209 overlay unsigned char fast = 1; // 1min or 2sec steps.
|
|
|
1210
|
|
|
1211 update_startvalues();
|
|
|
1212 clear_deco_table();
|
|
|
1213
|
|
|
1214 temp_deco = pres_respiration; // Starts from current real depth.
|
|
|
1215
|
|
|
1216 // Are we doing the special @+5min variation ?
|
|
|
1217 if(char_O_deco_status & 4)
|
|
|
1218 sim_extra_time();
|
|
|
1219
|
|
|
1220 //---- Loop until first stop, gas switch, or surface is reached ----------
|
|
|
1221 for(;;)
|
|
|
1222 {
|
|
|
1223 overlay float old_deco = temp_deco; // Pamb backup (bars)
|
|
|
1224
|
|
|
1225 // Try ascending 1 full minute (fast) or 2sec (!fast):
|
|
|
1226 if( fast )
|
|
|
1227 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar.
|
|
|
1228 else
|
|
|
1229 temp_deco -= (10.0/30.0)*METER_TO_BAR; // 2sec at 10m/min.
|
|
|
1230
|
|
|
1231 if( temp_deco < pres_surface ) // But don't go over surface.
|
|
|
1232 temp_deco = pres_surface;
|
|
|
1233
|
|
|
1234 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because
|
|
|
1235 // one minute passed.
|
|
|
1236 sim_limit(GF_low);
|
|
|
1237
|
|
|
1238 // Did we reach deepest remaining stop ?
|
|
|
1239 if( temp_deco < sim_lead_tissue_limit )
|
|
|
1240 {
|
|
|
1241 temp_deco = old_deco; // Restore last correct depth,
|
|
|
1242
|
|
|
1243 if( fast )
|
|
|
1244 {
|
|
|
1245 fast = 0; // Retry with 2sec steps.
|
|
|
1246 continue;
|
|
|
1247 }
|
|
|
1248 else
|
|
|
1249 break; // Done...
|
|
|
1250 }
|
|
|
1251
|
|
|
1252 // Did we reach surface ?
|
|
|
1253 // NOTE: we should round BEFORE checking surface is reached.
|
|
|
1254 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER);
|
|
|
1255 if( temp_depth_limit == 0 )
|
|
|
1256 {
|
|
|
1257 temp_deco = pres_surface; // Yes: finished !
|
|
|
1258 break;
|
|
|
1259 }
|
|
|
1260
|
|
|
1261 // Check for gas change below new depth ?
|
|
|
1262 if( gas_switch_deepest() )
|
|
|
1263 {
|
|
|
1264 assert( temp_depth_limit > 0);
|
|
|
1265
|
|
|
1266 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface;
|
|
|
1267 break;
|
|
|
1268 }
|
|
|
1269
|
|
|
1270 if( fast )
|
|
|
1271 sim_dive_mins++; // Advance simulated time by 1 minute.
|
|
|
1272 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe
|
|
|
1273 sim_tissue(fast); // and update tissues for 1 min.
|
|
|
1274 }
|
|
|
1275 }
|
|
|
1276
|
|
|
1277 //////////////////////////////////////////////////////////////////////////////
|
|
|
1278 // Simulation extra time at the current depth.
|
|
|
1279 //
|
|
|
1280 // This routine is used for @+5min feature.
|
|
|
1281 void sim_extra_time(void)
|
|
|
1282 {
|
|
|
1283 overlay unsigned char extra = char_I_extra_time;
|
|
|
1284 do {
|
|
|
1285 sim_dive_mins++; // Advance simulated time by 1 minute.
|
|
|
1286 sim_tissue(1); // and update tissues for 1 min.
|
|
|
1287 } while( --extra != 0 );
|
|
|
1288 }
|
|
|
1289
|
|
|
1290 //////////////////////////////////////////////////////////////////////////////
|
|
|
1291 // calc_tissue
|
|
|
1292 //
|
|
|
1293 // optimized in v.101
|
|
|
1294 //
|
|
|
1295 static void calc_tissue(PARAMETER unsigned char period)
|
|
|
1296 {
|
|
|
1297 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m
|
|
|
1298 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m
|
|
|
1299
|
|
|
1300 for (ci=0;ci<NUM_COMP;ci++)
|
|
|
1301 {
|
|
|
1302 read_buhlmann_times(period); // 2 sec or 1 min period.
|
|
|
1303
|
|
|
1304 // N2
|
|
|
1305 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e;
|
|
|
1306 temp_tissue_safety();
|
|
|
1307 pres_tissue_N2[ci] += temp_tissue;
|
|
|
1308
|
|
|
1309 // He
|
|
|
1310 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e;
|
|
|
1311 temp_tissue_safety();
|
|
|
1312 pres_tissue_He[ci] += temp_tissue;
|
|
|
1313 }
|
|
|
1314 }
|
|
|
1315
|
|
|
1316 //////////////////////////////////////////////////////////////////////////////
|
|
|
1317 // calc_limit
|
|
|
1318 //
|
|
|
1319 // New in v.111 : separated from calc_tissue(), and depends on GF value.
|
|
|
1320 //
|
|
|
1321 static void calc_limit(void)
|
|
|
1322 {
|
|
|
1323 char_O_gtissue_no = 255;
|
|
|
1324 calc_lead_tissue_limit = 0.0;
|
|
|
1325
|
|
|
1326 for(ci=0; ci<NUM_COMP;ci++)
|
|
|
1327 {
|
|
|
1328 overlay float N2 = pres_tissue_N2[ci];
|
|
|
1329 overlay float He = pres_tissue_He[ci];
|
|
|
1330 overlay float p = N2 + He;
|
|
|
1331
|
|
|
1332 read_buhlmann_coefficients();
|
|
|
1333 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p;
|
|
|
1334 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p;
|
|
|
1335
|
|
|
1336 // Apply the Eric Baker's varying gradient factor correction.
|
|
|
1337 // Note: the correction factor depends both on GF and b,
|
|
|
1338 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%),
|
|
|
1339 // so that can change who is the leading gas...
|
|
|
1340 // Note: Also depends of the GF. So the calcul is different for
|
|
|
1341 // GF_low, current GF, or GF_high...
|
|
|
1342 // *BUT* calc_tissue() is used to compute bottom time,
|
|
|
1343 // hence what would happend at surface,
|
|
|
1344 // hence at GF_high.
|
|
|
1345 if( char_I_deco_model != 0 )
|
|
|
1346 p = ( p - var_N2_a * GF_high) * var_N2_b
|
|
|
1347 / (GF_high + var_N2_b * (1.0 - GF_high));
|
|
|
1348 else
|
|
|
1349 p = (p - var_N2_a) * var_N2_b;
|
|
|
1350 if( p < 0.0 ) p = 0.0;
|
|
|
1351
|
|
|
1352 if( p > calc_lead_tissue_limit )
|
|
|
1353 {
|
|
|
1354 char_O_gtissue_no = ci;
|
|
|
1355 calc_lead_tissue_limit = p;
|
|
|
1356 }
|
|
|
1357 }
|
|
|
1358
|
|
|
1359 assert( char_O_gtissue_no < NUM_COMP );
|
|
|
1360 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0);
|
|
|
1361 }
|
|
|
1362
|
|
|
1363 //////////////////////////////////////////////////////////////////////////////
|
|
|
1364 // calc_nullzeit
|
|
|
1365 //
|
|
|
1366 // calculates the remaining bottom time
|
|
|
1367 //
|
|
|
1368 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second
|
|
|
1369 // exponential term to the M-value equation, making it impossible to
|
|
|
1370 // invert... So we have to make a fast-simu until we find a better way.
|
|
|
1371 //
|
|
|
1372 // Input: pres_respiration
|
|
|
1373 // Output: char_O_nullzeit
|
|
|
1374 //
|
|
|
1375 static void calc_nullzeit(void)
|
|
|
1376 {
|
|
|
1377 //---- Compute ppN2 and ppHe ---------------------------------------------
|
|
|
1378 temp_deco = pres_respiration;
|
|
|
1379 sim_alveolar_presures();
|
|
|
1380
|
|
|
1381 char_O_nullzeit = 240;
|
|
|
1382 for(ci=0; ci<NUM_COMP; ci++)
|
|
|
1383 {
|
|
|
1384 //---- Read A/B values and loading factor for N2 and He --------------
|
|
|
1385 overlay float tN2 = pres_tissue_N2[ci];
|
|
|
1386 overlay float tHe = pres_tissue_He[ci];
|
|
|
1387 overlay float t = tN2 + tHe;
|
|
|
1388 overlay unsigned char ndl;
|
|
|
1389 overlay unsigned char period = 10;
|
|
|
1390
|
|
|
1391 read_buhlmann_coefficients();
|
|
|
1392 read_buhlmann_times(2); // Starts with a 10min period.
|
|
|
1393
|
|
|
1394 //---- Simulate for that tissue --------------------------------------
|
|
|
1395 // NOTE: No need to simulate for longuer than the already found NDL.
|
|
|
1396 for(ndl=0; ndl<char_O_nullzeit;)
|
|
|
1397 {
|
|
|
1398 //---- Compute updated mix M-value at surface
|
|
|
1399 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t;
|
|
|
1400 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t;
|
|
|
1401 overlay float M0 = (a + pres_surface/b);
|
|
|
1402
|
|
|
1403 //---- Add 10min/1min to N2/He tissues
|
|
|
1404 overlay float dTN2 = (ppN2 - tN2) * var_N2_e;
|
|
|
1405 overlay float dTHe = (ppHe - tHe) * var_He_e;
|
|
|
1406
|
|
|
1407 //---- Apply security margin when using the non-GF model
|
|
|
1408 if( char_I_deco_model == 0 )
|
|
|
1409 {
|
|
|
1410 dTN2 *= float_saturation_multiplier;
|
|
|
1411 dTHe *= float_saturation_multiplier;
|
|
|
1412 }
|
|
|
1413 else // Or GF-based model
|
|
|
1414 M0 = GF_high * (M0 - pres_surface) + pres_surface;
|
|
|
1415
|
|
|
1416 //---- Simulate off-gasing while going to surface
|
|
|
1417 // TODO !
|
|
|
1418 // dTN2 -= exp( ... ascent time ... ppN2...)
|
|
|
1419 // dTHe -= exp( ... ascent time ... ppHe...)
|
|
|
1420
|
|
|
1421 //---- Ok now, and still ok to surface after 1 or 10 minutes ?
|
|
|
1422 if( (t <= M0) && (t + dTN2 + dTHe <= M0) )
|
|
|
1423 {
|
|
|
1424 tN2 += dTN2; // YES: apply gas loadings,
|
|
|
1425 tHe += dTHe;
|
|
|
1426 t = tN2 + tHe;
|
|
|
1427 ndl += period; // increment NDL,
|
|
|
1428 continue; // and loop.
|
|
|
1429 }
|
|
|
1430
|
|
|
1431 //---- Should we retry with smaller steps ?
|
|
|
1432 if( period == 10 )
|
|
|
1433 {
|
|
|
1434 read_buhlmann_times(1); // 1min coefs.
|
|
|
1435 period = 1;
|
|
|
1436 continue;
|
|
|
1437 }
|
|
|
1438
|
|
|
1439 //---- ELSE make a linear approx for the last minute
|
|
|
1440 // Usefull to have a meaningfull rounding of NDL.
|
|
|
1441 // But ONLY it positive (negativ casted to unsigned is bad).
|
|
|
1442 if( M0 > t )
|
|
|
1443 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe));
|
|
|
1444 break;
|
|
|
1445 }
|
|
|
1446
|
|
|
1447 // Keep the shortest NDL found
|
|
|
1448 if( ndl < char_O_nullzeit )
|
|
|
1449 char_O_nullzeit = ndl;
|
|
|
1450 }
|
|
|
1451 }
|
|
|
1452
|
|
|
1453 //////////////////////////////////////////////////////////////////////////////
|
|
|
1454 // calc_ascenttime
|
|
|
1455 //
|
|
|
1456 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters,
|
|
|
1457 // and all stops.
|
|
|
1458 //
|
|
|
1459 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant.
|
|
|
1460 static void calc_ascenttime(void)
|
|
|
1461 {
|
|
|
1462 overlay unsigned char x;
|
|
|
1463 overlay unsigned short sum;
|
|
|
1464
|
|
|
1465 // + 0.7 to count 1 minute ascent time from 3 metre to surface
|
|
|
1466 overlay float ascent = pres_respiration - pres_surface + 0.7;
|
|
|
1467 if (ascent < 0.0)
|
|
|
1468 ascent = 0.0;
|
|
|
1469 sum = (unsigned short)(ascent + 0.99);
|
|
|
1470
|
|
|
1471 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++)
|
|
|
1472 sum += (unsigned short)internal_deco_time[x];
|
|
|
1473
|
|
|
1474 if( char_O_deco_status == 1 )
|
|
|
1475 int_O_ascenttime = sum;
|
|
|
1476 else
|
|
|
1477 int_O_extra_ascenttime = sum;
|
|
|
1478
|
|
|
1479 if(int_O_ascenttime>999)
|
|
|
1480 int_O_ascenttime=999; // limit to 999'
|
|
|
1481 }
|
|
|
1482
|
|
|
1483 //////////////////////////////////////////////////////////////////////////////
|
|
|
1484 // update_startvalues
|
|
|
1485 //
|
|
|
1486 // updated in v.102
|
|
|
1487 //
|
|
|
1488 void update_startvalues(void)
|
|
|
1489 {
|
|
|
1490 overlay unsigned char x;
|
|
|
1491
|
|
|
1492 // Start ascent simulation with current tissue partial pressures.
|
|
|
1493 for(x=0; x<NUM_COMP; x++)
|
|
|
1494 {
|
|
|
1495 sim_pres_tissue_N2[x] = pres_tissue_N2[x];
|
|
|
1496 sim_pres_tissue_He[x] = pres_tissue_He[x];
|
|
|
1497 }
|
|
|
1498
|
|
|
1499 // No leading tissue (yet) for this ascent simulation.
|
|
|
1500 sim_lead_tissue_limit = 0.0;
|
|
|
1501 sim_lead_tissue_no = 255;
|
|
|
1502 }
|
|
|
1503
|
|
|
1504 //////////////////////////////////////////////////////////////////////////////
|
|
|
1505 // sim_tissue
|
|
|
1506 //
|
|
|
1507 // optimized in v.101
|
|
|
1508 //
|
|
|
1509 // Function very simular to calc_tissue, but:
|
|
|
1510 // + Use a 1min or 10min period.
|
|
|
1511 // + Do it on sim_pres_tissue, instead of pres_tissue.
|
|
|
1512 static void sim_tissue(PARAMETER unsigned char period)
|
|
|
1513 {
|
|
|
1514 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m
|
|
|
1515 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m
|
|
|
1516
|
|
|
1517 for(ci=0; ci<NUM_COMP; ci++)
|
|
|
1518 {
|
|
|
1519 read_buhlmann_times(period); // 1 or 10 minute(s) interval
|
|
|
1520
|
|
|
1521 // N2
|
|
|
1522 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e;
|
|
|
1523 temp_tissue_safety();
|
|
|
1524 sim_pres_tissue_N2[ci] += temp_tissue;
|
|
|
1525
|
|
|
1526 // He
|
|
|
1527 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e;
|
|
|
1528 temp_tissue_safety();
|
|
|
1529 sim_pres_tissue_He[ci] += temp_tissue;
|
|
|
1530 }
|
|
|
1531 }
|
|
|
1532
|
|
|
1533 //////////////////////////////////////////////////////////////////////////////
|
|
|
1534 // sim_limit()
|
|
|
1535 //
|
|
|
1536 // New in v.111
|
|
|
1537 //
|
|
|
1538 // Function separated from sim_tissue() to allow recomputing limit on
|
|
|
1539 // different depth, because it depends on current gradient factor.
|
|
|
1540 //
|
|
|
1541 static void sim_limit(PARAMETER float GF_current)
|
|
|
1542 {
|
|
|
1543 assert( 0.0 < GF_current && GF_current <= 1.0f);
|
|
|
1544
|
|
|
1545 sim_lead_tissue_limit = 0.0;
|
|
|
1546 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue.
|
|
|
1547
|
|
|
1548 for(ci=0; ci<NUM_COMP; ci++)
|
|
|
1549 {
|
|
|
1550 overlay float N2 = sim_pres_tissue_N2[ci];
|
|
|
1551 overlay float He = sim_pres_tissue_He[ci];
|
|
|
1552 overlay float p = N2 + He;
|
|
|
1553
|
|
|
1554 read_buhlmann_coefficients();
|
|
|
1555 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p;
|
|
|
1556 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p;
|
|
|
1557
|
|
|
1558 // Apply the Eric Baker's varying gradient factor correction.
|
|
|
1559 // Note: the correction factor depends both on GF and b,
|
|
|
1560 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%),
|
|
|
1561 // so that can change who is the leading gas...
|
|
|
1562 // Note: Also depends of the GF_current...
|
|
|
1563 if( char_I_deco_model != 0 )
|
|
|
1564 p = ( p - var_N2_a * GF_current)
|
|
|
1565 / (GF_current / var_N2_b + 1.0 - GF_current);
|
|
|
1566 else
|
|
|
1567 p = (p - var_N2_a) * var_N2_b;
|
|
|
1568 if( p < 0.0 ) p = 0.0;
|
|
|
1569
|
|
|
1570 if( p > sim_lead_tissue_limit )
|
|
|
1571 {
|
|
|
1572 sim_lead_tissue_no = ci;
|
|
|
1573 sim_lead_tissue_limit = p;
|
|
|
1574 }
|
|
|
1575 } // for ci
|
|
|
1576
|
|
|
1577 assert( sim_lead_tissue_no < NUM_COMP );
|
|
|
1578 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 );
|
|
|
1579 }
|
|
|
1580
|
|
|
1581 //////////////////////////////////////////////////////////////////////////////
|
|
|
1582 // clear_deco_table
|
|
|
1583 //
|
|
|
1584 // unchanged in v.101
|
|
|
1585 //
|
|
|
1586 static void clear_deco_table(void)
|
|
|
1587 {
|
|
|
1588 overlay unsigned char x;
|
|
|
1589
|
|
|
1590 for(x=0; x<NUM_STOPS; ++x)
|
|
|
1591 {
|
|
|
1592 internal_deco_time [x] = 0;
|
|
|
1593 internal_deco_depth[x] = 0;
|
|
|
1594 }
|
|
|
1595 }
|
|
|
1596
|
|
|
1597 //////////////////////////////////////////////////////////////////////////////
|
|
|
1598 // update_deco_table
|
|
|
1599 //
|
|
|
1600 // Add 1 min to current stop.
|
|
|
1601 //
|
|
|
1602 // Inputs:
|
|
|
1603 // temp_depth_limit = stop's depth, in meters.
|
|
|
1604 // In/Out:
|
|
|
1605 // internal_deco_depth[] : depth (in metres) of each stops.
|
|
|
1606 // internal_deco_time [] : time (in minutes) of each stops.
|
|
|
1607 //
|
|
|
1608 static unsigned char update_deco_table()
|
|
|
1609 {
|
|
|
1610 overlay unsigned char x;
|
|
|
1611 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown).
|
|
|
1612 assert( temp_depth_limit > 0 ); // No stop at surface...
|
|
|
1613
|
|
|
1614 for(x=0; x<NUM_STOPS; ++x)
|
|
|
1615 {
|
|
|
1616 // Make sure deco-stops are recorded in order:
|
|
|
1617 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) );
|
|
|
1618
|
|
|
1619 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit )
|
|
|
1620 {
|
|
|
1621 // Do not overflow (max 255')
|
|
|
1622 if( internal_deco_time[x] < 255 )
|
|
|
1623 {
|
|
|
1624 internal_deco_time[x]++;
|
|
|
1625 return 1;
|
|
|
1626 }
|
|
|
1627 // But store extra in the next stop...
|
|
|
1628 }
|
|
|
1629
|
|
|
1630 if( internal_deco_depth[x] == 0 )
|
|
|
1631 {
|
|
|
1632 internal_deco_depth[x] = temp_depth_limit;
|
|
|
1633
|
|
|
1634 internal_deco_time[x] = 1;
|
|
|
1635 return 1;
|
|
|
1636 }
|
|
|
1637 }
|
|
|
1638
|
|
|
1639 // Can't store stops at more than 96m.
|
|
|
1640 // Or stops at less that 3m too.
|
|
|
1641 // Just do nothing with that...
|
|
|
1642 return 0;
|
|
|
1643 }
|
|
|
1644
|
|
|
1645 //////////////////////////////////////////////////////////////////////////////
|
|
|
1646 // calc_gradient_factor
|
|
|
1647 //
|
|
|
1648 // optimized in v.101 (var_N2_a)
|
|
|
1649 // new code in v.102
|
|
|
1650 //
|
|
|
1651 static void calc_gradient_factor(void)
|
|
|
1652 {
|
|
|
1653 overlay float gf;
|
|
|
1654 overlay float N2 = pres_tissue_N2[char_O_gtissue_no];
|
|
|
1655 overlay float He = pres_tissue_He[char_O_gtissue_no];
|
|
|
1656
|
|
|
1657 assert( char_O_gtissue_no < NUM_COMP );
|
|
|
1658 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 );
|
|
|
1659
|
|
|
1660 // tissue > respiration (currently off-gasing)
|
|
|
1661 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium.
|
|
|
1662 // GF = 100% when respiration == limit.
|
|
|
1663 temp_tissue = N2 + He;
|
|
|
1664 if( temp_tissue <= pres_respiration )
|
|
|
1665 gf = 0.0;
|
|
|
1666 else
|
|
|
1667 {
|
|
|
1668 overlay float limit = calc_lead_tissue_limit;
|
|
|
1669 // NOTE: in GF model, calc_lead_tissue_limit include already the
|
|
|
1670 // correction due to gradient factor. To compute the actual
|
|
|
1671 // current GF, we need to (re-)compute the raw ambiant-pressure
|
|
|
1672 // limit from the Bühlmann model.
|
|
|
1673 if( char_I_deco_model != 0 )
|
|
|
1674 {
|
|
|
1675 ci = char_O_gtissue_no;
|
|
|
1676 read_buhlmann_coefficients();
|
|
|
1677 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue;
|
|
|
1678 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue;
|
|
|
1679 limit = (temp_tissue - var_N2_a) * var_N2_b;
|
|
|
1680 }
|
|
|
1681
|
|
|
1682 gf = (temp_tissue - pres_respiration)
|
|
|
1683 / (temp_tissue - limit)
|
|
|
1684 * 100.0;
|
|
|
1685 if( gf > 254.5 ) gf = 255.0;
|
|
|
1686 if( gf < 0.0 ) gf = 0.0;
|
|
|
1687 }
|
|
|
1688 char_O_gradient_factor = (unsigned char)(gf+0.5f);
|
|
|
1689
|
|
|
1690 if( char_I_deco_model != 0 ) // calculate relative gradient factor
|
|
|
1691 {
|
|
|
1692 overlay float rgf;
|
|
|
1693
|
|
|
1694 if( low_depth < 3 )
|
|
|
1695 rgf = GF_high;
|
|
|
1696 else
|
|
|
1697 {
|
|
|
1698 overlay float temp1 = low_depth * METER_TO_BAR;
|
|
|
1699 overlay float temp2 = pres_respiration - pres_surface;
|
|
|
1700
|
|
|
1701 if (temp2 <= 0)
|
|
|
1702 rgf = GF_high;
|
|
|
1703 else if (temp2 >= temp1)
|
|
|
1704 rgf = GF_low;
|
|
|
1705 else
|
|
|
1706 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta;
|
|
|
1707 }
|
|
|
1708
|
|
|
1709 rgf = gf / rgf; // gf is already in percent
|
|
|
1710 if( rgf < 0.0 ) rgf = 0.0;
|
|
|
1711 if( rgf > 254.5 ) rgf = 255.0;
|
|
|
1712 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f);
|
|
|
1713 }
|
|
|
1714 else
|
|
|
1715 char_O_relative_gradient_GF = char_O_gradient_factor;
|
|
|
1716 }
|
|
|
1717
|
|
|
1718 //////////////////////////////////////////////////////////////////////////////
|
|
|
1719 // deco_calc_desaturation_time
|
|
|
1720 //
|
|
|
1721 // FIXED N2_ratio
|
|
|
1722 // unchanged in v.101
|
|
|
1723 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier
|
|
|
1724 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31]
|
|
|
1725 //
|
|
|
1726 void deco_calc_desaturation_time(void)
|
|
|
1727 {
|
|
|
1728 RESET_C_STACK
|
|
|
1729
|
|
|
1730 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 );
|
|
|
1731 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 );
|
|
|
1732
|
|
|
1733 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann
|
|
|
1734 pres_surface = int_I_pres_surface * 0.001;
|
|
|
1735 ppN2 = N2_ratio * (pres_surface - ppWater);
|
|
|
1736 int_O_desaturation_time = 0;
|
|
|
1737 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR);
|
|
|
1738
|
|
|
1739 for(ci=0; ci<NUM_COMP; ci++)
|
|
|
1740 {
|
|
|
1741 overlay unsigned short desat_time; // For a particular compartiment, in min.
|
|
|
1742 overlay float temp1;
|
|
|
1743 overlay float temp2;
|
|
|
1744 overlay float temp3;
|
|
|
1745 overlay float temp4;
|
|
|
1746
|
|
|
1747 read_buhlmann_ht();
|
|
|
1748
|
|
|
1749 // saturation_time (for flight) and N2_saturation in multiples of halftime
|
|
|
1750 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time )
|
|
|
1751 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time )
|
|
|
1752 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations
|
|
|
1753 // N2
|
|
|
1754 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci];
|
|
|
1755 temp2 = ppN2 - pres_tissue_N2[ci];
|
|
|
1756 if (temp2 >= 0.0)
|
|
|
1757 temp1 = 0.0;
|
|
|
1758 else
|
|
|
1759 temp1 = temp1 / temp2;
|
|
|
1760
|
|
|
1761 if( 0.0 < temp1 && temp1 < 1.0 )
|
|
|
1762 {
|
|
|
1763 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested.
|
|
|
1764 // minus because log is negative.
|
|
|
1765 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary.
|
|
|
1766 temp2 = var_N2_ht * temp1 / float_desaturation_multiplier; // time necessary (in minutes ) for complete desaturation (see comment about 5 percent)
|
|
|
1767 }
|
|
|
1768 else
|
|
|
1769 {
|
|
|
1770 temp1 = 0.0;
|
|
|
1771 temp2 = 0.0;
|
|
|
1772 }
|
|
|
1773
|
|
|
1774 // He
|
|
|
1775 temp3 = 0.1 - pres_tissue_He[ci];
|
|
|
1776 if (temp3 >= 0.0)
|
|
|
1777 temp3 = 0.0;
|
|
|
1778 else
|
|
|
1779 temp3 = - temp3 / pres_tissue_He[ci];
|
|
|
1780
|
|
|
1781 if( 0.0 < temp3 && temp3 < 1.0 )
|
|
|
1782 {
|
|
|
1783 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary.
|
|
|
1784 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested.
|
|
|
1785 // minus because log is negative
|
|
|
1786 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier
|
|
|
1787 }
|
|
|
1788 else
|
|
|
1789 {
|
|
|
1790 temp3 = 0.0;
|
|
|
1791 temp4 = 0.0;
|
|
|
1792 }
|
|
|
1793
|
|
|
1794 // saturation_time (for flight)
|
|
|
1795 if (temp4 > temp2)
|
|
|
1796 desat_time = (unsigned short)temp4;
|
|
|
1797 else
|
|
|
1798 desat_time = (unsigned short)temp2;
|
|
|
1799
|
|
|
1800 if(desat_time > int_O_desaturation_time)
|
|
|
1801 int_O_desaturation_time = desat_time;
|
|
|
1802
|
|
|
1803 // N2 saturation in multiples of halftime for display purposes
|
|
|
1804 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8
|
|
|
1805 temp2 = temp2 + 80.0; // set center
|
|
|
1806 if (temp2 < 0.0)
|
|
|
1807 temp2 = 0.0;
|
|
|
1808 if (temp2 > 255.0)
|
|
|
1809 temp2 = 255.0;
|
|
|
1810 char_O_tissue_N2_saturation[ci] = (char)temp2;
|
|
|
1811
|
|
|
1812 // He saturation in multiples of halftime for display purposes
|
|
|
1813 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8
|
|
|
1814 temp4 = temp4 + 80.0; // set center
|
|
|
1815 if (temp4 < 0.0)
|
|
|
1816 temp4 = 0.0;
|
|
|
1817 if (temp4 > 255.0)
|
|
|
1818 temp4 = 255.0;
|
|
|
1819 char_O_tissue_He_saturation[ci] = (char)temp4;
|
|
|
1820 } // for
|
|
|
1821 }
|
|
|
1822
|
|
|
1823 //////////////////////////////////////////////////////////////////////////////
|
|
|
1824 // calc_wo_deco_step_1_min
|
|
|
1825 //
|
|
|
1826 // FIXED N2 Ratio
|
|
|
1827 // optimized in v.101 (...saturation_multiplier)
|
|
|
1828 // desaturation slowed down to 70,42%
|
|
|
1829 //
|
|
|
1830 static void calc_wo_deco_step_1_min(void)
|
|
|
1831 {
|
|
|
1832 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 );
|
|
|
1833 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 );
|
|
|
1834 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 );
|
|
|
1835 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 );
|
|
|
1836
|
|
|
1837 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann
|
|
|
1838 pres_respiration = pres_surface = int_I_pres_surface * 0.001;
|
|
|
1839 ppN2 = N2_ratio * (pres_respiration - ppWater);
|
|
|
1840 ppHe = 0.0;
|
|
|
1841 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR);
|
|
|
1842 float_saturation_multiplier = char_I_saturation_multiplier * 0.01;
|
|
|
1843
|
|
|
1844 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure
|
|
|
1845
|
|
|
1846 clear_deco_table();
|
|
|
1847 char_O_deco_status = 3; // surface new in v.102 : stays in surface state.
|
|
|
1848 char_O_nullzeit = 0;
|
|
|
1849 int_O_ascenttime = 0;
|
|
|
1850 int_O_extra_ascenttime = 0;
|
|
|
1851 calc_gradient_factor();
|
|
|
1852 }
|
|
|
1853
|
|
|
1854 //////////////////////////////////////////////////////////////////////////////
|
|
|
1855 // calc_dive_interval
|
|
|
1856 //
|
|
|
1857 // Prepare tissue for delay before the next dive simulation.
|
|
|
1858 //
|
|
|
1859 // Inputs: char_I_dive_interval == delay before dive (in 10' steps).
|
|
|
1860 // Outputs: pres_tissue_N2/He[], CNS_fraction
|
|
|
1861 //
|
|
|
1862 // Should be protected by deco_push_tissues_to_vault(),
|
|
|
1863 // deco_pull_tissues_from_vault()
|
|
|
1864 //
|
|
|
1865 // desaturation slowed down to 70,42%.
|
|
|
1866 //
|
|
|
1867 static void calc_dive_interval(void)
|
|
|
1868 {
|
|
|
1869 overlay unsigned char t;
|
|
|
1870 overlay unsigned char backup_model;
|
|
|
1871
|
|
|
1872 //---- Initialize simulation parameters ----------------------------------
|
|
|
1873 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann
|
|
|
1874 pres_respiration = pres_surface = int_I_pres_surface * 0.001;
|
|
|
1875 ppN2 = N2_ratio * (pres_respiration - ppWater);
|
|
|
1876 ppHe = 0.0;
|
|
|
1877 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR);
|
|
|
1878 float_saturation_multiplier = char_I_saturation_multiplier * 0.01;
|
|
|
1879
|
|
|
1880 // Make sure SURFACE_DESAT_FACTOR is applied:
|
|
|
1881 backup_model = char_I_deco_model;
|
|
|
1882 char_I_deco_model = 0;
|
|
|
1883
|
|
|
1884 //---- Perform simulation ------------------------------------------------
|
|
|
1885 for(t=0; t<char_I_dive_interval; ++t)
|
|
|
1886 {
|
|
|
1887 calc_tissue(2); // period = 10min.
|
|
|
1888 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9)
|
|
|
1889 }
|
|
|
1890 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 );
|
|
|
1891 int_O_CNS_fraction = (unsigned int)(CNS_fraction * 100.0 + 0.5);
|
|
|
1892
|
|
|
1893 //---- Restore model -----------------------------------------------------
|
|
|
1894 char_I_deco_model = backup_model;
|
|
|
1895 }
|
|
|
1896
|
|
|
1897 //////////////////////////////////////////////////////////////////////////////
|
|
|
1898 // deco_clear_CNS_fraction
|
|
|
1899 //
|
|
|
1900 // new in v.101
|
|
|
1901 //
|
|
|
1902 void deco_clear_CNS_fraction(void)
|
|
|
1903 {
|
|
|
1904 RESET_C_STACK
|
|
|
1905
|
|
|
1906 CNS_fraction = 0.0;
|
|
|
1907 int_O_CNS_fraction = 0;
|
|
|
1908 }
|
|
|
1909
|
|
|
1910 //////////////////////////////////////////////////////////////////////////////
|
|
|
1911 // deco_calc_CNS_fraction
|
|
|
1912 //
|
|
|
1913 // Input: char_I_actual_ppO2 : Current condition (in decibars).
|
|
|
1914 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec.
|
|
|
1915 // CNS_fraction : velue before period.
|
|
|
1916 // Output: CNS_fraction, int_O_CNS_fraction
|
|
|
1917 //
|
|
|
1918 void deco_calc_CNS_fraction(void)
|
|
|
1919 {
|
|
|
1920 overlay float time_factor = 1.0f;
|
|
|
1921 RESET_C_STACK
|
|
|
1922
|
|
|
1923 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 );
|
|
|
1924 assert( char_I_actual_ppO2 > 15 );
|
|
|
1925
|
|
|
1926 if( char_I_step_is_1min == 1 )
|
|
|
1927 time_factor = 30.0f;
|
|
|
1928 else if( char_I_step_is_1min == 2 )
|
|
|
1929 time_factor = 300.0f;
|
|
|
1930
|
|
|
1931 if (char_I_actual_ppO2 < 50)
|
|
|
1932 ; // no changes
|
|
|
1933 else if (char_I_actual_ppO2 < 60)
|
|
|
1934 CNS_fraction += time_factor/(-540.0 * char_I_actual_ppO2 + 54000.0);
|
|
|
1935 else if (char_I_actual_ppO2 < 70)
|
|
|
1936 CNS_fraction += time_factor/(-450.0 * char_I_actual_ppO2 + 48600.0);
|
|
|
1937 else if (char_I_actual_ppO2 < 80)
|
|
|
1938 CNS_fraction += time_factor/(-360.0 * char_I_actual_ppO2 + 42300.0);
|
|
|
1939 else if (char_I_actual_ppO2 < 90)
|
|
|
1940 CNS_fraction += time_factor/(-270.0 * char_I_actual_ppO2 + 35100.0);
|
|
|
1941 else if (char_I_actual_ppO2 < 110)
|
|
|
1942 CNS_fraction += time_factor/(-180.0 * char_I_actual_ppO2 + 27000.0);
|
|
|
1943 else if (char_I_actual_ppO2 < 150)
|
|
|
1944 CNS_fraction += time_factor/( -90.0 * char_I_actual_ppO2 + 17100.0);
|
|
|
1945 else if (char_I_actual_ppO2 < 160)
|
|
|
1946 CNS_fraction += time_factor/(-225.0 * char_I_actual_ppO2 + 37350.0);
|
|
|
1947 else if (char_I_actual_ppO2 < 165)
|
|
|
1948 CNS_fraction += time_factor*0.000755; // Arieli et all.(2002): Modeling pulmonary and CNS O2 toxicity... Formula (A1) based on value for 1.55 and c=20
|
|
|
1949 else if (char_I_actual_ppO2 < 170)
|
|
|
1950 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404
|
|
|
1951 else if (char_I_actual_ppO2 < 175)
|
|
|
1952 CNS_fraction += time_factor*0.00136;
|
|
|
1953 else if (char_I_actual_ppO2 < 180)
|
|
|
1954 CNS_fraction += time_factor*0.00180;
|
|
|
1955 else if (char_I_actual_ppO2 < 185)
|
|
|
1956 CNS_fraction += time_factor*0.00237;
|
|
|
1957 else if (char_I_actual_ppO2 < 190)
|
|
|
1958 CNS_fraction += time_factor*0.00310;
|
|
|
1959 else if (char_I_actual_ppO2 < 195)
|
|
|
1960 CNS_fraction += time_factor*0.00401;
|
|
|
1961 else if (char_I_actual_ppO2 < 200)
|
|
|
1962 CNS_fraction += time_factor*0.00517;
|
|
|
1963 else if (char_I_actual_ppO2 < 230)
|
|
|
1964 CNS_fraction += time_factor*0.0209;
|
|
|
1965 else
|
|
|
1966 CNS_fraction += time_factor*0.0482; // value for 2.5
|
|
|
1967
|
|
|
1968 if( CNS_fraction > 9.99)
|
|
|
1969 CNS_fraction = 9.99;
|
|
|
1970 if( CNS_fraction < 0.0 )
|
|
|
1971 CNS_fraction = 0.0;
|
|
|
1972
|
|
|
1973 int_O_CNS_fraction = (unsigned int)(100.0 * CNS_fraction + 0.5);
|
|
|
1974 }
|
|
|
1975
|
|
|
1976 //////////////////////////////////////////////////////////////////////////////
|
|
|
1977 // deco_calc_CNS_planning
|
|
|
1978 //
|
|
|
1979 // Compute CNS during predicted ascent.
|
|
|
1980 //
|
|
|
1981 // Note: Needs a call to deco_push_tissues_to_vault(),
|
|
|
1982 // deco_pull_tissues_from_vault() to avoid trashing everything...
|
|
|
1983 //
|
|
|
1984 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[]
|
|
|
1985 // Output: CNS_fraction, int_O_CNS_fraction
|
|
|
1986 //
|
|
|
1987 void deco_calc_CNS_planning(void)
|
|
|
1988 {
|
|
|
1989 overlay unsigned char backup_gas_last_depth;
|
|
|
1990 overlay unsigned char backup_gas_last_used;
|
|
|
1991 overlay unsigned short backup_dive_mins;
|
|
|
1992 overlay unsigned char backup_actual_ppO2;
|
|
|
1993
|
|
|
1994 RESET_C_STACK
|
|
|
1995
|
|
|
1996 // Backup state machine
|
|
|
1997 backup_gas_last_depth = sim_gas_last_depth;
|
|
|
1998 backup_gas_last_used = sim_gas_last_used;
|
|
|
1999 backup_dive_mins = sim_dive_mins;
|
|
|
2000 backup_actual_ppO2 = char_I_actual_ppO2;
|
|
|
2001
|
|
|
2002 // Uses 1min CNS period:
|
|
|
2003 char_I_step_is_1min = 1;
|
|
|
2004
|
|
|
2005 //---- Retrieve bottom Gas used, and set variables.
|
|
|
2006 sim_gas_last_used = char_I_first_gas;
|
|
|
2007 sim_gas_last_depth = 0; // Surface gas marker.
|
|
|
2008 gas_switch_set(); // Sets initial calc_N2/He_ratio
|
|
|
2009
|
|
|
2010 //---- CCR mode : do the full TTS at once --------------------------------
|
|
|
2011 if( char_I_const_ppO2 != 0 )
|
|
|
2012 {
|
|
|
2013 overlay unsigned short t; // Needs 16bits here !
|
|
|
2014 char_I_actual_ppO2 = char_I_const_ppO2;
|
|
|
2015 for(t=0; t<int_O_ascenttime; ++t)
|
|
|
2016 deco_calc_CNS_fraction();
|
|
|
2017 }
|
|
|
2018 else //---- OC mode : have to follow all gas switches... -----------------
|
|
|
2019 {
|
|
|
2020 overlay unsigned char i = 0; // Decostop loop counter
|
|
|
2021 overlay float actual_ppO2;
|
|
|
2022 overlay unsigned char time, t;
|
|
|
2023
|
|
|
2024 //---- Ascent to surface delay
|
|
|
2025 // NOTE: count as if time is spent with bottom pressure,
|
|
|
2026 // AND the bottom gas
|
|
|
2027 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR)
|
|
|
2028 * (1.0 - calc_N2_ratio - calc_He_ratio);
|
|
|
2029 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0;
|
|
|
2030 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55;
|
|
|
2031 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5);
|
|
|
2032
|
|
|
2033 // Ascent time (rounded up):
|
|
|
2034 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5);
|
|
|
2035
|
|
|
2036 for(t=0; t<time; ++t)
|
|
|
2037 {
|
|
|
2038 deco_calc_CNS_fraction();
|
|
|
2039 sim_dive_mins++;
|
|
|
2040 }
|
|
|
2041
|
|
|
2042 //---- Do all further stops ------------------------------------------
|
|
|
2043 for(i=0; i<NUM_STOPS; ++i)
|
|
|
2044 {
|
|
|
2045 overlay unsigned char switch_gas;
|
|
|
2046
|
|
|
2047 //---- Get next stop, possibly in reverse order ------------------
|
|
|
2048 {
|
|
|
2049 time = char_O_deco_time[(NUM_STOPS-1)-i];
|
|
|
2050 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i];
|
|
|
2051 }
|
|
|
2052 if( time == 0 ) continue;
|
|
|
2053
|
|
|
2054 //---- Gas Switch ? ----------------------------------------------
|
|
|
2055 switch_gas = temp_depth_limit & 0x80; // Switch flag.
|
|
|
2056 temp_depth_limit &= 0x7F; // True stop depth.
|
|
|
2057
|
|
|
2058 if( switch_gas )
|
|
|
2059 {
|
|
|
2060 gas_switch_deepest();
|
|
|
2061 gas_switch_set();
|
|
|
2062 }
|
|
|
2063
|
|
|
2064 //---- Convert Depth and N2_ratio to ppO2 ------------------------
|
|
|
2065 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR)
|
|
|
2066 * (1.0 - calc_N2_ratio - calc_He_ratio);
|
|
|
2067 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0;
|
|
|
2068 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55;
|
|
|
2069 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5);
|
|
|
2070
|
|
|
2071 //---- Apply the stop
|
|
|
2072 for(t=0; t<time; ++t)
|
|
|
2073 {
|
|
|
2074 deco_calc_CNS_fraction();
|
|
|
2075 sim_dive_mins++;
|
|
|
2076 }
|
|
|
2077 }
|
|
|
2078 }
|
|
|
2079
|
|
|
2080 //---- Back to normal mode... --------------------------------------------
|
|
|
2081 char_I_step_is_1min = 0;
|
|
|
2082 sim_gas_last_depth = backup_gas_last_depth;
|
|
|
2083 sim_gas_last_used = backup_gas_last_used;
|
|
|
2084 sim_dive_mins = backup_dive_mins;
|
|
|
2085 char_I_actual_ppO2 = backup_actual_ppO2;
|
|
|
2086 }
|
|
|
2087
|
|
|
2088 //////////////////////////////////////////////////////////////////////////////
|
|
|
2089 // deco_calc_CNS_decrease_15min
|
|
|
2090 //
|
|
|
2091 // new in v.101
|
|
|
2092 //
|
|
|
2093 // calculates the half time of 90 minutes in 6 steps of 15 min
|
|
|
2094 // (Used in sleepmode, for low battery mode).
|
|
|
2095 //
|
|
|
2096 // Output: int_O_CNS_fraction
|
|
|
2097 // Uses and Updates: CNS_fraction
|
|
|
2098 //
|
|
|
2099 void deco_calc_CNS_decrease_15min(void)
|
|
|
2100 {
|
|
|
2101 RESET_C_STACK
|
|
|
2102 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 );
|
|
|
2103
|
|
|
2104 CNS_fraction = 0.890899 * CNS_fraction;
|
|
|
2105 int_O_CNS_fraction = (unsigned int)(CNS_fraction * 100.0 + 0.5);
|
|
|
2106 }
|
|
|
2107
|
|
|
2108 //////////////////////////////////////////////////////////////////////////////
|
|
|
2109 // deco_calc_percentage
|
|
|
2110 //
|
|
|
2111 // new in v.101
|
|
|
2112 //
|
|
|
2113 // calculates int_I_temp * char_I_temp / 100
|
|
|
2114 // output is int_I_temp
|
|
|
2115 //
|
|
|
2116 // Used to compute NoFly remaining time.
|
|
|
2117 //
|
|
|
2118 void deco_calc_percentage(void)
|
|
|
2119 {
|
|
|
2120 RESET_C_STACK
|
|
|
2121
|
|
|
2122 assert( 60 <= char_I_temp && char_I_temp <= 100 );
|
|
|
2123 assert( int_I_temp < 5760 ); // Less than 4 days = 96h...
|
|
|
2124
|
|
|
2125 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 );
|
|
|
2126
|
|
|
2127 assert( int_I_temp < 5760 ); // Less than 96h too...
|
|
|
2128 }
|
|
|
2129
|
|
|
2130
|
|
|
2131 //////////////////////////////////////////////////////////////////////////////
|
|
|
2132 // deco_gas_volumes
|
|
|
2133 //
|
|
|
2134 // new in v.111
|
|
|
2135 //
|
|
|
2136 // calculates volumes for each gas.
|
|
|
2137 //
|
|
|
2138 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive.
|
|
|
2139 // Gas list.
|
|
|
2140 // char_I_first_gas is the bottom gas.
|
|
|
2141 // decoplan (char_O_deco_depth, char_O_deco_time).
|
|
|
2142 // CF#54 == TRUE if shallowest stop first.
|
|
|
2143 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min.
|
|
|
2144 // CF#57 == deco liters/minutes (5 .. 50) or bar/min.
|
|
|
2145 // Output: int_O_gas_volumes[0..4] in litters * 0.1
|
|
|
2146 //
|
|
|
2147 void deco_gas_volumes(void)
|
|
|
2148 {
|
|
|
2149 overlay float volumes[NUM_GAS];
|
|
|
2150 overlay float bottom_usage, deco_usage;
|
|
|
2151 overlay unsigned char i, deepest_first;
|
|
|
2152 overlay unsigned char gas, depth;
|
|
|
2153 RESET_C_STACK
|
|
|
2154
|
|
|
2155 //---- initialize with bottom consumption --------------------------------
|
|
|
2156 for(i=0; i<NUM_GAS; ++i) // Nothing yet...
|
|
|
2157 volumes[i] = 0.0;
|
|
|
2158
|
|
|
2159 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS);
|
|
|
2160 gas = char_I_first_gas - 1;
|
|
|
2161
|
|
|
2162 bottom_usage = (float) char_I_bottom_usage;
|
|
|
2163 if( char_I_const_ppO2 == 0 && bottom_usage > 0.0 )
|
|
|
2164 volumes[gas]
|
|
|
2165 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar.
|
|
|
2166 * char_I_bottom_time // in minutes.
|
|
|
2167 * bottom_usage; // In liter/minutes.
|
|
|
2168
|
|
|
2169 //---- Ascent usage ------------------------------------------------------
|
|
|
2170 deco_usage = (float) char_I_deco_usage; // In liter/minutes.
|
|
|
2171
|
|
|
2172 depth = char_I_bottom_depth;
|
|
|
2173
|
|
|
2174 for(i=0; i<NUM_STOPS; ++i)
|
|
|
2175 {
|
|
|
2176 overlay unsigned char newDepth, time;
|
|
|
2177
|
|
|
2178 // Manage stops in reverse order (CF#54)
|
|
|
2179 if( deepest_first )
|
|
|
2180 {
|
|
|
2181 time = char_O_deco_time[i];
|
|
|
2182 if( time == 0 ) break; // End of table: done.
|
|
|
2183
|
|
|
2184 newDepth = char_O_deco_depth[i] & 0x7F;
|
|
|
2185 }
|
|
|
2186 else
|
|
|
2187 {
|
|
|
2188 time = char_O_deco_time[31-i];
|
|
|
2189 if( time == 0 ) continue; // not yet: still search table.
|
|
|
2190
|
|
|
2191 newDepth = char_O_deco_depth[31-i] & 0x7F;
|
|
|
2192 }
|
|
|
2193
|
|
|
2194 //---- Gas switch during this step -----------------------------------
|
|
|
2195 {
|
|
|
2196 overlay unsigned char newGas = 0;
|
|
|
2197 overlay unsigned char newStop = 0; // NO CHANGE yet
|
|
|
2198 overlay unsigned char j;
|
|
|
2199
|
|
|
2200 for(j=0; j<NUM_GAS; ++j)
|
|
|
2201 {
|
|
|
2202 // Skip gas without changing depth:
|
|
|
2203 if( ! char_I_deco_gas_change[j] )
|
|
|
2204 continue;
|
|
|
2205 // Select gas changed between [newDepth .. depth]
|
|
|
2206 if( newDepth <= char_I_deco_gas_change[j]
|
|
|
2207 && char_I_deco_gas_change[j] <= depth )
|
|
|
2208 {
|
|
|
2209 // Keep the DEEPEST gas in that range:
|
|
|
2210 // Note: that = means changing gas at BEGINNING of this stop.
|
|
|
2211 if( char_I_deco_gas_change[j] >= newStop )
|
|
|
2212 {
|
|
|
2213 newGas = j;
|
|
|
2214 newStop = char_I_deco_gas_change[j];
|
|
|
2215 }
|
|
|
2216 }
|
|
|
2217 }
|
|
|
2218
|
|
|
2219 if( newStop ) // Did we find something ?
|
|
|
2220 {
|
|
|
2221 // usage BEFORE gas switch (if any), at 10m/min :
|
|
|
2222 if( deco_usage > 0.0 && depth > newStop )
|
|
|
2223 // Plus usage during ascent to the next stop, at 10m/min.
|
|
|
2224 volumes[gas] += ((depth+newStop)*0.05 + 1.0) // average depth --> bar.
|
|
|
2225 * (depth-newStop)*0.1 // metre --> min
|
|
|
2226 * deco_usage;
|
|
|
2227
|
|
|
2228 // Do gas switch:
|
|
|
2229 gas = newGas;
|
|
|
2230 depth = newStop;
|
|
|
2231 }
|
|
|
2232 }
|
|
|
2233
|
|
|
2234 // usage AFTER gas switch (if any), at 10m/min :
|
|
|
2235 if( depth > newDepth )
|
|
|
2236 volumes[gas] += ((depth+newDepth)*0.05 + 1.0) // average depth --> bar.
|
|
|
2237 * (depth-newDepth)*0.1 // metre --> min
|
|
|
2238 * deco_usage;
|
|
|
2239
|
|
|
2240 // Do stop:
|
|
|
2241 depth = newDepth;
|
|
|
2242
|
|
|
2243 // Usage at stop:
|
|
|
2244 if( deco_usage > 0.0 )
|
|
|
2245 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar.
|
|
|
2246 * time // in minutes.
|
|
|
2247 * deco_usage; // in xxx / min @ 1bar.
|
|
|
2248 else
|
|
|
2249 volumes[gas] = 65535.0;
|
|
|
2250 }
|
|
|
2251
|
|
|
2252 // From last stop to surface
|
|
|
2253 if( deco_usage > 0.0 )
|
|
|
2254 volumes[gas] += (depth*0.05 + 1.0) // avg depth --> bar.
|
|
|
2255 * depth * 0.1 // time to surface, in minutes.
|
|
|
2256 * deco_usage; // in xxx / min @ 1bar.
|
|
|
2257
|
|
|
2258 //---- convert results for the ASM interface -----------------------------
|
|
|
2259 for(i=0; i<NUM_GAS; ++i)
|
|
|
2260 if( volumes[i] > 65534.0 )
|
|
|
2261 int_O_gas_volumes[i] = 65535;
|
|
|
2262 else
|
|
|
2263 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5);
|
|
|
2264 }
|
|
|
2265
|
|
|
2266 //////////////////////////////////////////////////////////////////////////////
|
|
|
2267
|
|
|
2268 void deco_push_tissues_to_vault(void)
|
|
|
2269 {
|
|
|
2270 overlay unsigned char x;
|
|
|
2271 RESET_C_STACK
|
|
|
2272
|
|
|
2273 cns_vault = CNS_fraction;
|
|
|
2274 low_depth_vault = low_depth;
|
|
|
2275
|
|
|
2276 for (x=0;x<NUM_COMP;x++)
|
|
|
2277 {
|
|
|
2278 pres_tissue_N2_vault[x] = pres_tissue_N2[x];
|
|
|
2279 pres_tissue_He_vault[x] = pres_tissue_He[x];
|
|
|
2280 }
|
|
|
2281 }
|
|
|
2282
|
|
|
2283 void deco_pull_tissues_from_vault(void)
|
|
|
2284 {
|
|
|
2285 overlay unsigned char x;
|
|
|
2286 RESET_C_STACK
|
|
|
2287
|
|
|
2288 for (x=0; x<NUM_COMP; x++)
|
|
|
2289 {
|
|
|
2290 pres_tissue_N2[x] = pres_tissue_N2_vault[x];
|
|
|
2291 pres_tissue_He[x] = pres_tissue_He_vault[x];
|
|
|
2292 }
|
|
|
2293
|
|
|
2294 // Restore both CNS variable, too.
|
|
|
2295 CNS_fraction = cns_vault;
|
|
|
2296 int_O_CNS_fraction = (unsigned int)(CNS_fraction * 100.0 + 0.5);
|
|
|
2297
|
|
|
2298 // GF history too:
|
|
|
2299 low_depth = low_depth_vault;
|
|
|
2300 locked_GF_step = GF_delta / low_depth;
|
|
|
2301 }
|
|
|
2302
|
|
|
2303 //////////////////////////////////////////////////////////////////////////////
|
|
|
2304 //
|
|
|
2305 #ifndef CROSS_COMPILE
|
|
|
2306 void main() {}
|
|
|
2307 #endif
|
