Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 511:2a6293641d51
NEW NDL NDL faster/more precise simu (but no closed formula for trimix).
| author | JeanDo |
|---|---|
| date | Fri, 25 Nov 2011 01:56:17 +0100 |
| parents | 103051b4d9c1 |
| children | e7893664bd29 |
| rev | line source |
|---|---|
| 116 | 1 // ************************************************************** |
| 2 // p2_deco.c | |
| 3 // | |
| 4 // Created on: 12.05.2009 | |
| 5 // Author: chsw | |
| 6 // | |
| 7 // ************************************************************** | |
| 8 | |
| 9 ////////////////////////////////////////////////////////////////////////////// | |
| 10 // OSTC - diving computer code | |
| 11 // Copyright (C) 2008 HeinrichsWeikamp GbR | |
| 12 // | |
| 13 // This program is free software: you can redistribute it and/or modify | |
| 14 // it under the terms of the GNU General Public License as published by | |
| 15 // the Free Software Foundation, either version 3 of the License, or | |
| 16 // (at your option) any later version. | |
| 17 // | |
| 18 // This program is distributed in the hope that it will be useful, | |
| 19 // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 20 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 21 // GNU General Public License for more details. | |
| 22 // | |
| 23 // You should have received a copy of the GNU General Public License | |
| 24 // along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 25 // | |
| 26 ////////////////////////////////////////////////////////////////////////////// | |
| 27 | |
| 28 // ***************************** | |
| 29 // ** I N T R O D U C T I O N ** | |
| 30 // ***************************** | |
| 31 // | |
| 32 // OSTC | |
| 33 // | |
| 34 // code: | |
| 35 // p2_deco_main_c_v101.c | |
| 36 // part2 of the OSTC code | |
| 37 // code with constant O2 partial pressure routines | |
| 38 // under construction !! | |
| 39 // | |
| 40 // summary: | |
| 41 // decompression routines | |
| 42 // for the OSTC experimental project | |
| 43 // written by Christian Weikamp | |
| 44 // last revision __________ | |
| 45 // comments added _________ | |
| 46 // | |
| 47 // additional files: | |
| 48 // p2_tables_v100.romdata (other files) | |
| 49 // 18f4685_ostc_v100.lkr (linker script) | |
| 50 // | |
| 51 // history: | |
| 52 // 01/03/08 v100: first release candidate | |
| 53 // 03/13/08 v101: start of programming ppO2 code | |
| 54 // 03/13/25 v101a: backup of interrim version with ppO2 calculation | |
| 55 // 03/13/25 v101: open circuit gas change during deco | |
| 56 // 03/13/25 v101: CNS_fraction calculation | |
| 57 // 03/13/26 v101: optimization of tissue calc routines | |
| 58 // 07/xx/08 v102a: debug of bottom time routine | |
| 59 // 09/xx/08 v102d: Gradient Factor Model implemenation | |
| 60 // 10/10/08 v104: renamed to build v103 for v118 stable | |
| 171 | 61 // 10/14/08 v104: integration of char_I_depth_last_deco for Gradient Model |
| 116 | 62 // 03/31/09 v107: integration of FONT Incon24 |
| 63 // 05/23/10 v109: 5 gas changes & 1 min timer | |
| 64 // 07/13/10 v110: cns vault added | |
| 65 // 12/25/10 v110: split in three files (deco.c, main.c, definitions.h) | |
| 163 | 66 // 2011/01/20: [jDG] Create a common file included in ASM and C code. |
| 167 | 67 // 2011/01/23: [jDG] Added read_custom_function(). |
| 203 | 68 // 2011/01/24: [jDG] Make ascenttime an short. No more overflow! |
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69 // 2011/01/25: [jDG] Fusion deco array for both models. |
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70 // 2011/01/25: [jDG] Use CF(54) to reverse deco order. |
| 193 | 71 // 2011/02/11: [jDG] Reworked gradient-factor implementation. |
| 197 | 72 // 2011/02/13: [jDG] CF55 for additional gas switch delay in decoplan. |
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73 // 2011/02/15: [jDG] Fixed inconsistencies introduced by gas switch delays. |
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74 // 2011/03/21: [jDG] Added gas consumption (CF56 & CF57) evaluation for OCR mode. |
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75 // 2011/04/10: [jDG] Use timer TMR3 to limit loops in calc_hauptroutine_calc_deco(). |
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76 // 2011/04/15: [jDG] Store low_depth in 32bits (w/o rounding), for a better stability. |
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77 // 2011/04/25: [jDG] Added 1mn mode for CNS calculation, to allow it for decoplanning. |
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78 // 2011/04/27: [jDG] Fixed char_O_gradient_factor calculation when model uses gradient-factor. |
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79 // 2011/05/02: [jDG] Added "Future TTS" function (CF58). |
| 338 | 80 // 2011/05/17: [jDG] Various cleanups. |
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81 // 2011/08/08: [jDG] Computes CNS during deco planning ascent. |
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82 // 2011/11/24: [jDG] Slightly faster and better NDL computation. |
| 116 | 83 // |
| 167 | 84 // TODO: |
| 85 // + Allow to abort MD2 calculation (have to restart next time). | |
| 86 // | |
| 87 // Literature: | |
| 200 | 88 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
| 116 | 89 // 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 |
| 90 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
| 91 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
| 92 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
| 93 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
| 167 | 94 // |
| 95 // | |
| 116 | 96 |
| 97 // ********************* | |
| 98 // ** I N C L U D E S ** | |
| 99 // ********************* | |
| 100 #include <math.h> | |
| 167 | 101 |
| 192 | 102 // *********************************************** |
| 103 // ** V A R I A B L E S D E F I N I T I O N S ** | |
| 104 // *********************************************** | |
| 105 | |
| 106 #include "p2_definitions.h" | |
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107 #define TEST_MAIN |
| 509 | 108 #include "../OSTC_code_asm_part1/shared_definitions.h" |
| 192 | 109 |
| 200 | 110 // Water vapour partial pressure in the lumb. |
| 317 | 111 #define ppWater 0.0627 |
| 112 #define METER_TO_BAR 0.09985 | |
| 113 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
| 200 | 114 |
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115 // Surface security factor |
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116 #define SURFACE_DESAT_FACTOR 0.7042 |
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117 |
| 167 | 118 // ************************* |
| 119 // ** P R O T O T Y P E S ** | |
| 120 // ************************* | |
| 121 | |
| 122 static void calc_hauptroutine(void); | |
| 123 static void calc_nullzeit(void); | |
| 124 | |
| 192 | 125 static void calc_tissue(PARAMETER unsigned char period); |
| 258 | 126 static void calc_limit(void); |
| 192 | 127 |
| 167 | 128 static void clear_tissue(void); |
| 129 static void calc_ascenttime(void); | |
| 130 static void update_startvalues(void); | |
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131 static void clear_deco_table(void); |
| 471 | 132 static unsigned char update_deco_table(void); |
| 192 | 133 |
| 134 static void sim_tissue(PARAMETER unsigned char period); | |
| 135 static void sim_limit(PARAMETER float GF_current); | |
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136 static void sim_extra_time(void); |
| 368 | 137 static void calc_dive_interval(void); |
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138 |
| 167 | 139 static void calc_gradient_factor(void); |
| 140 static void calc_wo_deco_step_1_min(void); | |
| 141 | |
| 142 static void calc_hauptroutine_data_input(void); | |
| 143 static void calc_hauptroutine_update_tissues(void); | |
| 144 static void calc_hauptroutine_calc_deco(void); | |
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145 static void sim_ascent_to_first_stop(void); |
| 167 | 146 |
| 241 | 147 static unsigned char gas_switch_deepest(void); |
| 148 static void gas_switch_set(void); | |
| 217 | 149 |
| 241 | 150 static unsigned char calc_nextdecodepth(void); |
| 116 | 151 |
| 200 | 152 //---- Bank 4 parameters ----------------------------------------------------- |
| 163 | 153 #pragma udata bank4=0x400 |
| 116 | 154 |
| 155 static float temp_limit; | |
| 156 static float GF_low; | |
| 157 static float GF_high; | |
| 158 static float GF_delta; | |
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159 static float low_depth; // Depth of deepest stop |
| 192 | 160 static float locked_GF_step; // GF_delta / low_depth |
| 161 | |
| 162 static unsigned char temp_depth_limit; | |
| 171 | 163 |
| 192 | 164 // Simulation context: used to predict ascent. |
| 165 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 166 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 116 | 167 |
| 192 | 168 // Real context: what we are doing now. |
| 169 static float calc_lead_tissue_limit; // | |
| 116 | 170 |
| 338 | 171 static unsigned char internal_deco_time[NUM_STOPS]; |
| 172 static unsigned char internal_deco_depth[NUM_STOPS]; | |
| 116 | 173 |
| 174 static float cns_vault; | |
| 339 | 175 static float pres_tissue_N2_vault[NUM_COMP]; |
| 176 static float pres_tissue_He_vault[NUM_COMP]; | |
| 116 | 177 |
| 163 | 178 //---- Bank 5 parameters ----------------------------------------------------- |
| 179 #pragma udata bank5=0x500 | |
| 180 | |
| 167 | 181 static unsigned char ci; |
| 116 | 182 static float pres_respiration; |
| 183 static float pres_surface; | |
| 184 static float temp_deco; | |
| 236 | 185 static float ppN2; |
| 200 | 186 static float ppHe; |
| 116 | 187 static float temp_tissue; |
| 200 | 188 static float N2_ratio; // Breathed gas nitrogen ratio. |
| 189 static float He_ratio; // Breathed gas helium ratio. | |
| 190 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
| 191 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
| 192 static float var_He_a; // Bühlmann a, for current He tissue. | |
| 193 static float var_He_b; // Bühlmann b, for current He tissue. | |
| 194 static float var_N2_e; // Exposition, for current N2 tissue. | |
| 195 static float var_He_e; // Exposition, for current He tissue. | |
| 509 | 196 static float var_N2_ht; // Half-time for current N2 tissue. |
| 197 static float var_He_ht; // Half-time for current N2 tissue. | |
| 116 | 198 |
| 338 | 199 static float pres_diluent; // new in v.101 |
| 200 static float const_ppO2; // new in v.101 | |
| 116 | 201 |
| 241 | 202 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
| 203 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
| 203 | 204 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
| 205 static unsigned short sim_dive_mins; // Simulated dive time. | |
| 200 | 206 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
| 207 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
| 208 static float CNS_fraction; // new in v.101 | |
| 209 static float float_saturation_multiplier; // new in v.101 | |
| 210 static float float_desaturation_multiplier; // new in v.101 | |
| 338 | 211 static float float_deco_distance; // new in v.101 |
| 212 static char flag_in_divemode; // new in v.108 | |
| 167 | 213 |
| 338 | 214 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
| 167 | 215 |
| 163 | 216 //---- Bank 6 parameters ----------------------------------------------------- |
| 217 #pragma udata bank6=0x600 | |
| 116 | 218 |
| 339 | 219 float pres_tissue_N2[NUM_COMP]; |
| 220 float pres_tissue_He[NUM_COMP]; | |
| 509 | 221 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. |
| 222 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
| 116 | 223 |
| 163 | 224 //---- Bank 7 parameters ----------------------------------------------------- |
| 225 #pragma udata bank7=0x700 | |
| 509 | 226 // EMPTY ... |
| 116 | 227 |
| 163 | 228 //---- Bank 8 parameters ----------------------------------------------------- |
| 116 | 229 #pragma udata bank8=0x800 |
| 163 | 230 |
| 116 | 231 static char md_pi_subst[256]; |
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232 #define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
| 116 | 233 |
| 163 | 234 //---- Bank 9 parameters ----------------------------------------------------- |
| 167 | 235 #pragma udata bank9=0x900 |
| 116 | 236 |
| 163 | 237 static char md_state[48]; // DONT MOVE !! // has to be at the beginning of bank 9 for the asm code!!! |
| 116 | 238 |
| 164 | 239 // internal, dbg: |
| 167 | 240 static unsigned char DBG_char_I_deco_model; // new in v.108. |
| 164 | 241 static unsigned char DBG_char_I_depth_last_deco; // new in v.108 |
| 212 | 242 static unsigned char DBG_deco_gas_change; // new in v.108 |
| 224 | 243 static unsigned char DBG_deco_N2_ratio; // new in v.108 |
| 244 static unsigned char DBG_deco_He_ratio; // new in v.108 | |
| 164 | 245 static float DBG_pres_surface; // new in v.108 |
| 246 static float DBG_GF_low; // new in v.108 | |
| 247 static float DBG_GF_high; // new in v.108 | |
| 248 static float DBG_const_ppO2; // new in v.108 | |
| 249 static float DBG_float_saturation_multiplier; // new in v.108 | |
| 250 static float DBG_float_desaturation_multiplier; // new in v.108 | |
| 251 static float DBG_float_deco_distance; // new in v.108 | |
| 252 static float DBG_N2_ratio; // new in v.108 | |
| 253 static float DBG_He_ratio; // new in v.108 | |
| 254 | |
| 167 | 255 ////////////////////////////////////////////////////////////////////////////// |
| 256 ////////////////////////////////////////////////////////////////////////////// | |
| 257 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 258 ////////////////////////////////////////////////////////////////////////////// | |
| 259 ////////////////////////////////////////////////////////////////////////////// | |
| 260 // | |
| 261 // End of PROM code is 17F00, So push tables on PROM top... | |
| 262 // | |
| 263 #pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. | |
| 264 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) | |
| 116 | 265 |
| 167 | 266 // Magic table to compute the MD2 HASH |
| 267 // | |
| 268 #pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... | |
| 203 | 269 rom const rom unsigned short md_pi[] = |
| 116 | 270 { |
| 271 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 | |
| 272 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA | |
| 273 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 | |
| 274 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A | |
| 275 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 | |
| 276 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 | |
| 277 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 | |
| 278 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 | |
| 279 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 | |
| 280 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F | |
| 281 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 | |
| 282 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 | |
| 283 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A | |
| 284 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 | |
| 285 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A | |
| 286 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 | |
| 287 }; | |
| 288 | |
| 167 | 289 ////////////////////////////////////////////////////////////////////////////// |
| 290 ////////////////////////////////////////////////////////////////////////////// | |
| 291 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 292 ////////////////////////////////////////////////////////////////////////////// | |
| 293 ////////////////////////////////////////////////////////////////////////////// | |
| 294 // | |
| 116 | 295 // all new in v.102 |
| 296 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 297 | |
| 298 #pragma code p2_deco = 0x0C000 | |
| 299 | |
| 167 | 300 ////////////////////////////////////////////////////////////////////////////// |
| 301 // DBS - debug on start of dive | |
| 302 // | |
| 303 static void create_dbs_set_dbg_and_ndl20mtr(void) | |
| 116 | 304 { |
| 167 | 305 overlay char i; // Local loop index. |
| 306 | |
| 307 //---- Reset DEBUG bit fields -------------------------------------------- | |
| 116 | 308 int_O_DBS_bitfield = 0; |
| 309 int_O_DBS2_bitfield = 0; | |
| 310 if(int_O_DBG_pre_bitfield & DBG_RUN) | |
| 311 int_O_DBG_pre_bitfield = DBG_RESTART; | |
| 312 else | |
| 313 int_O_DBG_pre_bitfield = DBG_RUN; | |
| 314 int_O_DBG_post_bitfield = 0; | |
| 167 | 315 |
| 316 //---- Set 20meters ND limit --------------------------------------------- | |
| 116 | 317 char_O_NDL_at_20mtr = 255; |
| 318 | |
| 167 | 319 //---- Copy all dive parameters ------------------------------------------ |
| 116 | 320 DBG_N2_ratio = N2_ratio; |
| 321 DBG_He_ratio = He_ratio; | |
| 322 DBG_char_I_deco_model = char_I_deco_model; | |
| 323 DBG_char_I_depth_last_deco = char_I_depth_last_deco; | |
| 324 DBG_pres_surface = pres_surface; | |
| 325 DBG_GF_low = GF_low; | |
| 326 DBG_GF_high = GF_high; | |
| 327 DBG_const_ppO2 = const_ppO2; | |
| 224 | 328 DBG_deco_N2_ratio = char_I_deco_N2_ratio[0]; |
| 329 DBG_deco_He_ratio = char_I_deco_He_ratio[0]; | |
| 225 | 330 DBG_deco_gas_change = deco_gas_change[0]; |
| 116 | 331 DBG_float_saturation_multiplier = float_saturation_multiplier; |
| 332 DBG_float_desaturation_multiplier = float_desaturation_multiplier; | |
| 333 DBG_float_deco_distance = float_deco_distance; | |
| 334 | |
| 167 | 335 //---- Setup some error (?) conditions ----------------------------------- |
| 116 | 336 if(char_I_deco_model) |
| 337 int_O_DBS_bitfield |= DBS_mode; | |
| 338 if(const_ppO2) | |
| 339 int_O_DBS_bitfield |= DBS_ppO2; | |
| 339 | 340 for(i = 0; i < NUM_COMP; i++) |
| 341 if(pres_tissue_He[i]) | |
| 116 | 342 int_O_DBS_bitfield |= DBS_HE_sat; |
| 343 if(float_saturation_multiplier < 0.99) | |
| 344 int_O_DBS_bitfield |= DBS_SAT2l; | |
| 345 if(float_saturation_multiplier > 1.3) | |
| 346 int_O_DBS_bitfield |= DBS_SAT2h; | |
| 347 if(GF_low < 0.19) | |
| 348 int_O_DBS_bitfield |= DBS_GFLOW2l; | |
| 349 if(GF_low > 1.01) | |
| 350 int_O_DBS_bitfield |= DBS_GFLOW2h; | |
| 351 if(GF_high < 0.6) | |
| 352 int_O_DBS_bitfield |= DBS_GFHGH2l; | |
| 353 if(GF_high > 1.01) | |
| 354 int_O_DBS_bitfield |= DBS_GFHGH2h; | |
| 355 if((N2_ratio + He_ratio) > 0.95) | |
| 356 int_O_DBS_bitfield |= DBS_GASO22l; | |
| 357 if((N2_ratio + He_ratio) < 0.05) | |
| 358 int_O_DBS_bitfield |= DBS_GASO22h; | |
| 359 if(float_deco_distance > 0.25) | |
| 360 int_O_DBS_bitfield |= DBS_DIST2h; | |
| 361 if(char_I_depth_last_deco > 8) | |
| 362 int_O_DBS_bitfield |= DBS_LAST2h; | |
| 224 | 363 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) > 95)) |
| 116 | 364 int_O_DBS_bitfield |= DBS_DECOO2l; |
| 224 | 365 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) < 5)) |
| 116 | 366 int_O_DBS_bitfield |= DBS_DECOO2h; |
| 367 if(pres_respiration > 3.0) | |
| 368 int_O_DBS2_bitfield |= DBS2_PRES2h; | |
| 369 if(pres_surface - pres_respiration > 0.2) | |
| 370 int_O_DBS2_bitfield |= DBS2_PRES2l; | |
| 371 if(pres_surface < 0.75) | |
| 372 int_O_DBS2_bitfield |= DBS2_SURF2l; | |
| 373 if(pres_surface > 1.11) | |
| 374 int_O_DBS2_bitfield |= DBS2_SURF2h; | |
| 375 if(float_desaturation_multiplier < 0.70) | |
| 376 int_O_DBS2_bitfield |= DBS2_DESAT2l; | |
| 377 if(float_desaturation_multiplier > 1.01) | |
| 378 int_O_DBS2_bitfield |= DBS2_DESAT2h; | |
| 379 if(GF_low > GF_high) | |
| 380 int_O_DBS2_bitfield |= DBS2_GFDneg; | |
| 381 } | |
| 382 | |
| 167 | 383 ////////////////////////////////////////////////////////////////////////////// |
| 384 // DBG - set DBG to end_of_dive | |
| 385 // | |
| 386 static void set_dbg_end_of_dive(void) | |
| 116 | 387 { |
| 388 int_O_DBG_pre_bitfield &= (~DBG_RUN); | |
| 389 int_O_DBG_post_bitfield &= (~DBG_RUN); | |
| 390 } | |
| 391 | |
| 167 | 392 ////////////////////////////////////////////////////////////////////////////// |
| 393 // DBG - NDL at first 20 m. hit | |
| 394 // | |
| 395 static void check_ndl(void) | |
| 116 | 396 { |
| 167 | 397 if( char_O_NDL_at_20mtr == 255 // Still in NDL mode ? |
| 398 && int_I_pres_respiration > 3000 // And we hit the 20m limit ? | |
| 399 ) | |
| 116 | 400 { |
| 167 | 401 char_O_NDL_at_20mtr = char_O_nullzeit; // change to max bottom time. |
| 402 if( char_O_NDL_at_20mtr == 255) // and avoid confusion. | |
| 184 | 403 char_O_NDL_at_20mtr = 254; |
| 116 | 404 } |
| 405 } | |
| 406 | |
| 167 | 407 ////////////////////////////////////////////////////////////////////////////// |
| 408 // DBG - multi main during dive | |
| 409 // | |
| 184 | 410 static void check_dbg(PARAMETER char is_post_check) |
| 116 | 411 { |
| 203 | 412 overlay unsigned short temp_DBS = 0; |
| 200 | 413 overlay unsigned char i; // Local loop index. |
| 167 | 414 |
| 116 | 415 if( (DBG_N2_ratio != N2_ratio) || (DBG_He_ratio != He_ratio) ) |
| 416 temp_DBS |= DBG_c_gas; | |
| 417 if(DBG_const_ppO2 != const_ppO2) | |
| 418 temp_DBS |= DBG_c_ppO2; | |
| 167 | 419 if( DBG_float_saturation_multiplier != float_saturation_multiplier |
| 420 || DBG_float_desaturation_multiplier != float_desaturation_multiplier | |
| 421 ) | |
| 116 | 422 temp_DBS |= DBG_CdeSAT; |
| 423 if(DBG_char_I_deco_model != char_I_deco_model) | |
| 424 temp_DBS |= DBG_C_MODE; | |
| 425 if(DBG_pres_surface != pres_surface) | |
| 426 temp_DBS |= DBG_C_SURF; | |
| 167 | 427 |
| 428 if( !DBS_HE_sat && !He_ratio) | |
| 339 | 429 for(i = 0; i < NUM_COMP; i++) |
| 430 if(pres_tissue_He[i]) | |
| 116 | 431 temp_DBS |= DBG_HEwoHE; |
| 167 | 432 |
| 225 | 433 if( DBG_deco_gas_change != deco_gas_change[0] |
| 224 | 434 || DBG_deco_N2_ratio != char_I_deco_N2_ratio[0] |
| 435 || DBG_deco_He_ratio != char_I_deco_He_ratio[0] ) | |
| 116 | 436 temp_DBS |= DBG_C_DGAS; |
| 167 | 437 |
| 116 | 438 if(DBG_float_deco_distance != float_deco_distance) |
| 439 temp_DBS |= DBG_C_DIST; | |
| 440 if(DBG_char_I_depth_last_deco != char_I_depth_last_deco) | |
| 441 temp_DBS |= DBG_C_LAST; | |
| 167 | 442 if( DBG_GF_low != GF_low |
| 443 || DBG_GF_high != GF_high ) | |
| 116 | 444 temp_DBS |= DBG_C_GF; |
| 445 if(pres_respiration > 13.0) | |
| 446 temp_DBS |= DBG_PHIGH; | |
| 447 if(pres_surface - pres_respiration > 0.2) | |
| 448 temp_DBS |= DBG_PLOW; | |
| 449 if(is_post_check) | |
| 450 int_O_DBG_post_bitfield |= temp_DBS; | |
| 451 else | |
| 452 int_O_DBG_pre_bitfield |= temp_DBS; | |
| 453 } | |
| 454 | |
| 167 | 455 ////////////////////////////////////////////////////////////////////////////// |
| 456 // DBG - prior to calc. of dive | |
| 457 // | |
| 458 static void check_pre_dbg(void) | |
| 116 | 459 { |
| 460 check_dbg(0); | |
| 461 } | |
| 462 | |
| 167 | 463 ////////////////////////////////////////////////////////////////////////////// |
| 464 // DBG - after decocalc of dive | |
| 465 // | |
| 466 static void check_post_dbg(void) | |
| 116 | 467 { |
| 468 check_dbg(1); | |
| 469 } | |
| 470 | |
| 165 | 471 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 472 ////////////////////////////////////////////////////////////////////////////// |
| 473 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 474 ////////////////////////////////////////////////////////////////////////////// | |
| 475 ////////////////////////////////////////////////////////////////////////////// | |
| 476 | |
| 235 | 477 ////////////////////////////////////////////////////////////////////////////// |
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478 // Bump to blue-screen when an assert is wrong |
| 235 | 479 #ifdef __DEBUG |
| 480 void assert_failed(PARAMETER short int line) | |
| 481 { | |
| 482 extern void PLED_resetdebugger(void); | |
| 483 extern unsigned short temp10; | |
| 484 | |
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485 temp10 = line; // Show source line number as stack depth. |
| 235 | 486 PLED_resetdebugger(); |
| 487 } | |
| 488 #endif | |
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489 |
| 235 | 490 ////////////////////////////////////////////////////////////////////////////// |
| 491 // When calling C code from ASM context, the data stack pointer and | |
| 492 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
| 493 | |
| 494 #ifdef CROSS_COMPILE | |
| 495 # define RESET_C_STACK | |
| 496 #else | |
| 497 # ifdef __DEBUG | |
| 498 # define RESET_C_STACK fillDataStack(); | |
| 499 void fillDataStack(void) | |
| 500 { | |
| 501 _asm | |
| 502 LFSR 1,C_STACK | |
| 503 MOVLW 0xCC | |
| 504 loop: MOVWF POSTINC1,0 | |
| 505 TSTFSZ FSR1L,0 | |
| 506 BRA loop | |
| 507 | |
| 508 LFSR 1,C_STACK | |
| 509 LFSR 2,C_STACK | |
| 510 _endasm | |
| 511 } | |
| 512 # else | |
| 513 # define RESET_C_STACK \ | |
| 514 _asm \ | |
| 515 LFSR 1, C_STACK \ | |
| 516 LFSR 2, C_STACK \ | |
| 517 _endasm | |
| 518 # endif | |
| 519 #endif | |
| 520 | |
| 521 ////////////////////////////////////////////////////////////////////////////// | |
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522 // Read CF values from the C code. |
| 235 | 523 |
| 488 | 524 #ifdef CROSS_COMPILE |
| 525 // Full description of the OSTC EEPROM map, including CF values. | |
| 526 # include "OSTC_eeprom.h" | |
| 527 #endif | |
| 528 | |
| 203 | 529 static short read_custom_function(PARAMETER unsigned char cf) |
| 167 | 530 { |
| 184 | 531 #ifdef CROSS_COMPILE |
| 488 | 532 return (cf & 32) ? eeprom.bank1_CF[cf-32].value |
| 533 : eeprom.bank0_CF[cf ].value; | |
| 184 | 534 #else |
| 167 | 535 extern unsigned char hi, lo; |
| 536 extern void getcustom15(); | |
| 537 _asm | |
| 538 movff cf,WREG | |
| 539 call getcustom15,0 | |
| 540 movff lo,PRODL | |
| 541 movff hi,PRODH | |
| 542 _endasm | |
| 184 | 543 #endif |
| 167 | 544 } |
| 545 | |
| 546 ////////////////////////////////////////////////////////////////////////////// | |
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547 // Fast subroutine to read RTC timer 3. |
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548 // Note: result is in 1/32 of msecs. |
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549 static unsigned short tmr3(void) |
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550 { |
| 261 | 551 #ifndef CROSS_COMPILE |
|
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552 _asm |
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553 movff 0xfb2,PRODL // TMR3L |
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554 movff 0xfb3,PRODH // TMR3H |
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555 _endasm // result in PRODH:PRODL. |
| 261 | 556 #else |
| 557 return 0; | |
| 558 #endif | |
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559 } |
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560 |
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561 ////////////////////////////////////////////////////////////////////////////// |
| 258 | 562 // read buhlmann tables A and B for compatriment ci |
| 563 // | |
| 564 static void read_buhlmann_coefficients(void) | |
| 165 | 565 { |
| 338 | 566 |
| 184 | 567 #ifndef CROSS_COMPILE |
| 167 | 568 // Note: we don't use far rom pointer, because the |
| 338 | 569 // 24 bits is too complex, hence we have to set |
| 167 | 570 // the UPPER page ourself... |
| 571 // --> Set zero if tables are moved to lower pages ! | |
| 572 _asm | |
| 573 movlw 1 | |
| 574 movwf TBLPTRU,0 | |
| 575 _endasm | |
| 184 | 576 #endif |
| 258 | 577 |
| 338 | 578 assert( 0 <= ci && ci < NUM_COMP ); |
| 579 | |
| 580 // Use an interleaved array (AoS) to access coefficients with a | |
| 581 // single addressing. | |
| 582 { | |
| 583 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
| 584 var_N2_a = *ptr++; | |
| 585 var_N2_b = *ptr++; | |
| 586 var_He_a = *ptr++; | |
| 587 var_He_b = *ptr++; | |
| 588 } | |
| 167 | 589 |
| 165 | 590 // Check reading consistency: |
| 591 if( (var_N2_a < 0.231) | |
| 592 || (var_N2_a > 1.27) | |
| 593 || (var_N2_b < 0.504) | |
| 594 || (var_N2_b > 0.966) | |
| 595 || (var_He_a < 0.510) | |
| 596 || (var_He_a > 1.75) | |
| 597 || (var_He_b < 0.423) | |
| 598 || (var_He_b > 0.927) | |
| 599 ) | |
| 258 | 600 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; |
| 601 } | |
| 602 | |
| 603 ////////////////////////////////////////////////////////////////////////////// | |
| 604 // read buhlmann tables for compatriment ci | |
| 605 // If period == 0 : 2sec interval | |
| 606 // 1 : 1 min interval | |
| 607 // 2 : 10 min interval. | |
| 608 static void read_buhlmann_times(PARAMETER char period) | |
| 609 { | |
| 610 #ifndef CROSS_COMPILE | |
| 611 // Note: we don't use far rom pointer, because the | |
| 612 // 24 bits is to complex, hence we have to set | |
| 613 // the UPPER page ourself... | |
| 614 // --> Set zero if tables are moved to lower pages ! | |
| 615 _asm | |
| 616 movlw 1 | |
| 617 movwf TBLPTRU,0 | |
| 618 _endasm | |
| 619 #endif | |
| 338 | 620 |
| 621 assert( 0 <= ci && ci < NUM_COMP ); | |
| 258 | 622 |
| 165 | 623 // Integration intervals. |
| 167 | 624 switch(period) |
| 165 | 625 { |
| 626 case 0: //---- 2 sec ----------------------------------------------------- | |
| 338 | 627 { |
| 628 overlay rom const float* ptr = &e2secs[2*ci]; | |
| 629 var_N2_e = *ptr++; | |
| 630 var_He_e = *ptr++; | |
| 631 } | |
| 165 | 632 |
| 633 // Check reading consistency: | |
| 634 if( (var_N2_e < 0.0000363) | |
| 635 || (var_N2_e > 0.00577) | |
| 636 || (var_He_e < 0.0000961) | |
| 637 || (var_He_e > 0.150) | |
| 638 ) | |
| 639 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 640 | |
| 641 break; | |
| 642 | |
| 643 case 1: //---- 1 min ----------------------------------------------------- | |
| 338 | 644 { |
| 645 overlay rom const float* ptr = &e1min[2*ci]; | |
| 646 var_N2_e = *ptr++; | |
| 647 var_He_e = *ptr++; | |
| 648 } | |
| 165 | 649 |
| 650 // Check reading consistency: | |
| 651 if( (var_N2_e < 1.09E-3) | |
| 652 || (var_N2_e > 0.1592) | |
| 653 || (var_He_e < 0.00288) | |
| 654 || (var_He_e > 0.3682) | |
| 655 ) | |
| 656 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 657 | |
| 658 break; | |
| 659 | |
| 660 case 2: //---- 10 min ---------------------------------------------------- | |
| 338 | 661 { |
| 662 overlay rom const float* ptr = &e10min[2*ci]; | |
| 663 var_N2_e = *ptr++; | |
| 664 var_He_e = *ptr++; | |
| 665 } | |
| 165 | 666 |
| 667 // Check reading consistency: | |
| 668 if( (var_N2_e < 0.01085) | |
| 669 || (var_N2_e > 0.82323) | |
| 670 || (var_He_e < 0.02846) | |
| 671 || (var_He_e > 0.98986) | |
| 672 ) | |
| 673 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 674 | |
| 675 break; | |
| 197 | 676 |
| 677 default: | |
| 678 assert(0); // Never go there... | |
| 165 | 679 } |
| 680 } | |
| 681 | |
| 682 ////////////////////////////////////////////////////////////////////////////// | |
| 509 | 683 // read buhlmann tables for compatriment ci |
| 684 // | |
| 685 static void read_buhlmann_ht(void) | |
| 686 { | |
| 687 | |
| 688 #ifndef CROSS_COMPILE | |
| 689 // Note: we don't use far rom pointer, because the | |
| 690 // 24 bits is to complex, hence we have to set | |
| 691 // the UPPER page ourself... | |
| 692 // --> Set zero if tables are moved to lower pages ! | |
| 693 _asm | |
| 694 movlw 1 | |
| 695 movwf TBLPTRU,0 | |
| 696 _endasm | |
| 697 #endif | |
| 698 | |
| 699 assert( 0 <= ci && ci < NUM_COMP ); | |
| 700 { | |
| 701 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
| 702 var_N2_ht = *ptr++; | |
| 703 var_He_ht = *ptr++; | |
| 704 } | |
| 705 | |
| 706 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
| 707 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
| 708 } | |
| 709 | |
| 710 ////////////////////////////////////////////////////////////////////////////// | |
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711 // calc_nextdecodepth |
| 165 | 712 // |
| 116 | 713 // new in v.102 |
| 165 | 714 // |
| 116 | 715 // INPUT, changing during dive: |
| 509 | 716 // temp_deco |
| 192 | 717 // low_depth |
| 167 | 718 // |
| 116 | 719 // INPUT, fixed during dive: |
| 167 | 720 // pres_surface |
| 721 // GF_delta | |
| 722 // GF_high | |
| 723 // GF_low | |
| 171 | 724 // char_I_depth_last_deco |
| 167 | 725 // float_deco_distance |
| 726 // | |
| 241 | 727 // RETURN TRUE iff a stop is needed. |
| 728 // | |
| 116 | 729 // OUTPUT |
| 171 | 730 // locked_GF_step |
| 167 | 731 // temp_depth_limt |
| 192 | 732 // low_depth |
| 167 | 733 // |
| 241 | 734 static unsigned char calc_nextdecodepth(void) |
| 167 | 735 { |
| 241 | 736 //--- Max ascent speed --------------------------------------------------- |
| 737 // Recompute leading gas limit, at current depth: | |
| 317 | 738 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
| 241 | 739 |
| 740 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 302 | 741 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
| 241 | 742 |
| 743 // Do we need to stop at current depth ? | |
| 744 overlay unsigned char need_stop = 0; | |
| 745 | |
| 746 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 747 | |
| 212 | 748 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
| 509 | 749 if( char_I_deco_model != 0 ) |
| 116 | 750 { |
| 241 | 751 if( depth >= low_depth ) |
| 192 | 752 sim_limit( GF_low ); |
| 753 else | |
| 754 sim_limit( GF_high - depth * locked_GF_step ); | |
| 755 | |
| 756 // Stops are needed ? | |
| 757 if( sim_lead_tissue_limit > pres_surface ) | |
| 758 { | |
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759 // Compute tolerated depth, for the leading tissue [metre]: |
| 317 | 760 overlay float depth_tol = (sim_lead_tissue_limit - pres_surface) * BAR_TO_METER; |
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761 |
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762 // Deepest stop, in multiples of 3 metres. |
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763 overlay unsigned char first_stop = 3 * (short)(0.99999 + depth_tol * 0.33333 ); |
| 192 | 764 assert( first_stop < 128 ); |
| 171 | 765 |
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766 // Is it a new deepest needed stop ? If yes this is the reference for |
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767 // the varying gradient factor. So reset that: |
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768 if( depth_tol > min_depth && depth_tol > low_depth ) |
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769 { |
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770 // Store the deepest stop depth, as reference for GF_low. |
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771 low_depth = depth_tol; |
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772 locked_GF_step = GF_delta / low_depth; |
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773 } |
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774 |
| 264 | 775 #if defined(__DEBUG) || defined(CROSS_COMPILE) |
| 261 | 776 { |
| 777 // Extra testing code to make sure the first_stop formula | |
| 778 // and rounding provides correct depth: | |
| 317 | 779 overlay float pres_stop = first_stop * METER_TO_BAR |
| 261 | 780 + pres_surface; |
| 781 | |
| 782 // Keep GF_low until a first stop depth is found: | |
| 783 if( first_stop >= low_depth ) | |
| 784 sim_limit( GF_low ); | |
| 785 else | |
| 786 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 787 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 788 sim_limit( GF_high - first_stop * locked_GF_step ); | |
| 789 | |
| 302 | 790 // upper limit (lowest pressure tolerated), + 1mbar for rounding...: |
| 791 assert( sim_lead_tissue_limit < (pres_stop + 0.001) ); | |
| 261 | 792 } |
| 793 #endif | |
| 794 | |
| 212 | 795 // Apply correction for the shallowest stop. |
| 192 | 796 if( first_stop == 3 ) // new in v104 |
| 797 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 171 | 798 |
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799 // Because gradient factor at first_stop might be bigger than at |
| 261 | 800 // current depth, we might ascent a bit more. |
| 801 // Hence, check all stops until one is indeed higher than tolerated presure: | |
| 802 while(first_stop > 0) | |
| 192 | 803 { |
| 804 overlay unsigned char next_stop; // Next index (0..30) | |
| 805 overlay float pres_stop; // Next depth (0m..90m) | |
| 171 | 806 |
| 241 | 807 // Check max speed, or reaching surface. |
| 808 if( first_stop <= min_depth ) | |
| 809 break; | |
| 810 | |
| 811 // So, there is indeed a stop needed: | |
| 812 need_stop = 1; | |
| 813 | |
| 192 | 814 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
| 815 next_stop = 0; | |
| 216 | 816 else if( first_stop == 6 ) |
| 817 next_stop = char_I_depth_last_deco; | |
| 192 | 818 else |
| 819 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 167 | 820 |
| 317 | 821 pres_stop = next_stop * METER_TO_BAR |
| 192 | 822 + pres_surface; |
| 823 | |
| 212 | 824 // Keep GF_low until a first stop depth is found: |
| 825 if( next_stop >= low_depth ) | |
| 826 sim_limit( GF_low ); | |
| 827 else | |
| 828 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 829 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 830 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 171 | 831 |
| 192 | 832 // upper limit (lowest pressure tolerated): |
| 833 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 834 break; | |
| 835 | |
| 836 // Else, validate that stop and loop... | |
| 837 first_stop = next_stop; | |
| 212 | 838 } |
| 839 | |
| 840 // next stop is the last validated depth found, aka first_stop | |
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841 temp_depth_limit = first_stop; // Stop depth, in metre. |
| 192 | 842 } |
| 171 | 843 else |
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844 temp_depth_limit = 0; // stop depth, in metre. |
| 116 | 845 } |
| 167 | 846 else //---- ZH-L16 model ------------------------------------------------- |
| 116 | 847 { |
| 192 | 848 overlay float pres_gradient; |
| 849 | |
| 850 // Original model | |
| 116 | 851 // optimized in v.101 |
| 171 | 852 // char_I_depth_last_deco included in v.101 |
| 116 | 853 |
| 192 | 854 // Compute sim_lead_tissue_limit too, but just once. |
| 855 sim_limit(1.0); | |
| 856 | |
| 857 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 167 | 858 if (pres_gradient >= 0) |
| 116 | 859 { |
| 317 | 860 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
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861 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
| 241 | 862 need_stop = 1; // Hit. |
| 863 | |
| 864 // Implement last stop at 4m/5m/6m... | |
| 865 if( temp_depth_limit == 3 ) | |
| 866 temp_depth_limit = char_I_depth_last_deco; | |
| 171 | 867 } |
| 116 | 868 else |
| 241 | 869 temp_depth_limit = 0; |
| 171 | 870 } |
| 212 | 871 |
| 217 | 872 //---- Check gas change -------------------------------------------------- |
| 241 | 873 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
| 874 | |
| 875 return need_stop; | |
| 167 | 876 } |
| 116 | 877 |
| 167 | 878 ////////////////////////////////////////////////////////////////////////////// |
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879 // copy_deco_table |
| 167 | 880 // |
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881 // Buffer the stops, once computed, so we can continue to display them |
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882 // while computing the next set. |
| 167 | 883 // |
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884 static void copy_deco_table(void) |
| 116 | 885 { |
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886 // Copy depth of the first (deepest) stop, because when reversing |
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887 // order, it will be hard to find... |
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888 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
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889 char_O_first_deco_time = internal_deco_time [0]; |
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890 |
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891 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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892 { |
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893 overlay unsigned char x, y; |
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894 |
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895 //---- First: search the first non-null depth |
| 339 | 896 for(x=(NUM_STOPS-1); x != 0; --x) |
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897 if( internal_deco_depth[x] != 0 ) break; |
| 116 | 898 |
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899 //---- Second: copy to output table (in reverse order) |
| 338 | 900 for(y=0; y<NUM_STOPS; y++, --x) |
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901 { |
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902 char_O_deco_depth[y] = internal_deco_depth[x]; |
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903 char_O_deco_time [y] = internal_deco_time [x]; |
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904 |
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905 // Stop only once the last transfer is done. |
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906 if( x == 0 ) break; |
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907 } |
| 116 | 908 |
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909 //---- Third: fill table end with null |
| 339 | 910 for(y++; y<NUM_STOPS; y++) |
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911 { |
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912 char_O_deco_time [y] = 0; |
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913 char_O_deco_depth[y] = 0; |
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914 } |
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915 } |
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916 else //---- Straight copy ------------------------------------------------ |
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917 { |
| 167 | 918 overlay unsigned char x; |
| 919 | |
| 339 | 920 for(x=0; x<NUM_STOPS; x++) |
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921 { |
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922 char_O_deco_depth[x] = internal_deco_depth[x]; |
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923 char_O_deco_time [x] = internal_deco_time [x]; |
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924 } |
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925 } |
| 167 | 926 } |
| 116 | 927 |
| 167 | 928 ////////////////////////////////////////////////////////////////////////////// |
| 116 | 929 // temp_tissue_safety // |
| 167 | 930 // |
| 116 | 931 // outsourced in v.102 |
| 167 | 932 // |
| 933 // Apply safety factors for brand ZH-L16 model. | |
| 934 // | |
| 935 static void temp_tissue_safety(void) | |
| 116 | 936 { |
| 197 | 937 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
| 938 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 939 | |
| 167 | 940 if( char_I_deco_model == 0 ) |
| 116 | 941 { |
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942 if( temp_tissue < 0.0 ) |
| 126 | 943 temp_tissue *= float_desaturation_multiplier; |
| 116 | 944 else |
| 126 | 945 temp_tissue *= float_saturation_multiplier; |
| 116 | 946 } |
| 167 | 947 } |
| 116 | 948 |
| 167 | 949 ////////////////////////////////////////////////////////////////////////////// |
| 950 ////////////////////////////////////////////////////////////////////////////// | |
| 116 | 951 // ** THE JUMP-IN CODE ** |
| 952 // ** for the asm code ** | |
| 167 | 953 ////////////////////////////////////////////////////////////////////////////// |
| 954 ////////////////////////////////////////////////////////////////////////////// | |
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955 |
| 167 | 956 ////////////////////////////////////////////////////////////////////////////// |
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957 // Called every 2 seconds during diving. |
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958 // update tissues every time. |
| 184 | 959 // |
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960 // Every 6 seconds (or slower when TTS > 16): |
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961 // - update deco table (char_O_deco_time/depth) with new values. |
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962 // - update ascent time, |
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963 // - set status to zero (so we can check there is new results). |
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964 // |
| 116 | 965 void deco_calc_hauptroutine(void) |
| 966 { | |
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967 RESET_C_STACK |
| 116 | 968 calc_hauptroutine(); |
| 969 int_O_desaturation_time = 65535; | |
| 970 } | |
| 971 | |
| 167 | 972 ////////////////////////////////////////////////////////////////////////////// |
| 184 | 973 // Reset decompression model: |
| 974 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 975 // + Reset last stop to 0m | |
| 976 // + Reset all model output. | |
| 116 | 977 void deco_clear_tissue(void) |
| 978 { | |
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979 RESET_C_STACK |
| 116 | 980 clear_tissue(); |
| 981 } | |
| 982 | |
| 167 | 983 ////////////////////////////////////////////////////////////////////////////// |
| 278 | 984 // Called every 1 min during decoplanning. |
| 985 // Update tissues for 1 min. | |
| 986 // | |
| 987 void deco_calc_tissue(void) | |
| 988 { | |
| 989 RESET_C_STACK | |
| 990 calc_hauptroutine_update_tissues(); | |
| 991 } | |
| 992 | |
| 993 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 994 |
| 116 | 995 void deco_calc_wo_deco_step_1_min(void) |
| 996 { | |
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997 RESET_C_STACK |
| 116 | 998 calc_wo_deco_step_1_min(); |
| 999 deco_calc_desaturation_time(); | |
| 1000 } | |
| 1001 | |
| 167 | 1002 ////////////////////////////////////////////////////////////////////////////// |
| 1003 | |
| 368 | 1004 void deco_calc_dive_interval(void) |
| 1005 { | |
| 1006 RESET_C_STACK | |
| 1007 calc_dive_interval(); | |
| 1008 } | |
| 1009 | |
| 1010 ////////////////////////////////////////////////////////////////////////////// | |
| 1011 | |
| 116 | 1012 void deco_debug(void) |
| 1013 { | |
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1014 RESET_C_STACK |
| 116 | 1015 } |
| 1016 | |
| 241 | 1017 |
| 1018 ////////////////////////////////////////////////////////////////////////////// | |
| 1019 // Find current gas in the list (if any). | |
| 1020 // | |
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1021 // Input: char_I_current_gas. |
| 241 | 1022 // |
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1023 // Output: sim_gas_last_depth, temp_depth_limit. |
| 241 | 1024 // |
| 1025 static void gas_switch_find_current(void) | |
| 1026 { | |
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1027 assert( 0 <= char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
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1028 |
| 388 | 1029 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 |
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1030 { |
| 388 | 1031 sim_gas_last_used = char_I_current_gas; |
| 1032 | |
| 1033 // Note: if current is first gas, we must find it, but not set | |
| 1034 // last depth change to surface. | |
| 1035 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
| 1036 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
| 241 | 1037 } |
| 388 | 1038 else |
| 1039 sim_gas_last_used = 0; // Gas 6 = manual set | |
| 241 | 1040 } |
| 1041 | |
| 167 | 1042 ////////////////////////////////////////////////////////////////////////////// |
| 217 | 1043 // Find deepest available gas. |
| 201 | 1044 // |
| 241 | 1045 // Input: temp_depth_limit, |
| 1046 // deco_gas_change[] | |
| 1047 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
| 212 | 1048 // |
| 241 | 1049 // RETURNS TRUE if a stop is needed for gas switch. |
| 1050 // | |
| 1051 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
| 212 | 1052 // |
| 241 | 1053 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
| 1054 // are null), or during the ascent to make sure we are not passing a | |
| 1055 // stop (in which case both can be already set). | |
| 1056 // | |
| 1057 static unsigned char gas_switch_deepest(void) | |
| 201 | 1058 { |
| 241 | 1059 overlay unsigned char switch_deco = 0, switch_last = 0; |
| 201 | 1060 |
| 1061 if (char_I_const_ppO2 == 0) | |
| 1062 { | |
| 225 | 1063 overlay unsigned char j; |
| 1064 | |
| 241 | 1065 // Loop over all enabled gas, to find the deepest one, |
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1066 // above last used gas, but below temp_depth_limit. |
| 338 | 1067 for(j=0; j<NUM_GAS; ++j) |
| 225 | 1068 { |
| 241 | 1069 // Gas not (yet) allowed ? Skip ! |
| 1070 if( temp_depth_limit > deco_gas_change[j] ) | |
| 1071 continue; | |
| 1072 | |
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1073 // Gas deeper (or equal) than the current one ? Skip ! |
| 241 | 1074 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
| 1075 continue; | |
| 1076 | |
| 1077 // First, or deeper ? | |
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1078 if( switch_deco < deco_gas_change[j] ) |
| 241 | 1079 { |
| 1080 switch_deco = deco_gas_change[j]; | |
| 388 | 1081 switch_last = j+1; // 1..5 |
| 241 | 1082 } |
| 225 | 1083 } |
| 201 | 1084 } |
| 1085 | |
| 203 | 1086 // If there is a better gas available |
| 241 | 1087 if( switch_deco ) |
| 201 | 1088 { |
| 241 | 1089 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
| 201 | 1090 |
| 241 | 1091 // Should restart gas-switch delay only when gas do changes... |
| 1092 assert( sim_gas_delay <= sim_dive_mins ); | |
| 217 | 1093 |
| 241 | 1094 sim_gas_last_depth = switch_deco; |
| 1095 sim_gas_last_used = switch_last; | |
| 1096 sim_gas_delay = read_custom_function(55); | |
| 217 | 1097 |
| 241 | 1098 // Apply depth correction ONLY if CF#55 is not null: |
| 1099 if( sim_gas_delay > 0 ) | |
| 225 | 1100 { |
| 241 | 1101 sim_gas_delay += sim_dive_mins; |
| 1102 temp_depth_limit = switch_deco; | |
| 1103 return 1; | |
| 225 | 1104 } |
| 241 | 1105 |
| 1106 return 0; | |
| 217 | 1107 } |
| 1108 | |
| 241 | 1109 sim_gas_delay = 0; |
| 1110 return 0; | |
| 217 | 1111 } |
| 1112 | |
| 1113 ////////////////////////////////////////////////////////////////////////////// | |
| 1114 // Calculate gas switches | |
| 1115 // | |
| 1116 // | |
| 1117 // Input: N2_ratio, He_ratio. | |
| 1118 // sim_gas_last_used | |
| 1119 // | |
| 1120 // Output: calc_N2_ratio, calc_He_ratio | |
| 1121 // | |
| 241 | 1122 static void gas_switch_set(void) |
| 217 | 1123 { |
| 338 | 1124 assert( 0 <= sim_gas_last_used && sim_gas_last_used <= NUM_GAS ); |
| 217 | 1125 |
| 388 | 1126 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. |
| 224 | 1127 { |
| 1128 calc_N2_ratio = N2_ratio; | |
| 1129 calc_He_ratio = He_ratio; | |
| 1130 } | |
| 1131 else | |
| 1132 { | |
| 1133 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
| 1134 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
| 217 | 1135 } |
| 201 | 1136 |
| 1137 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
| 1138 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
| 1139 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
| 1140 } | |
| 1141 | |
| 1142 ////////////////////////////////////////////////////////////////////////////// | |
| 1143 // | |
| 212 | 1144 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
| 509 | 1145 // temp_deco : simulated respiration pressure |
| 276 | 1146 // float_deco_distance : security factor. |
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1147 // Water-vapor pressure inside limbs (ppWater). |
| 212 | 1148 // |
| 236 | 1149 // Output: ppN2, ppHe. |
| 212 | 1150 // |
| 1151 static void sim_alveolar_presures(void) | |
| 201 | 1152 { |
| 212 | 1153 overlay float deco_diluent = temp_deco; // new in v.101 |
| 1154 | |
| 276 | 1155 // Take deco offset into account, but not at surface. |
| 1156 // Note: this should be done on ambiant pressure, hence before | |
| 1157 // computing the diluant partial pressure... | |
| 1158 if( deco_diluent > pres_surface ) | |
| 1159 deco_diluent += float_deco_distance; | |
| 1160 | |
| 212 | 1161 //---- CCR mode : deco gas switch ? -------------------------------------- |
| 276 | 1162 if( char_I_const_ppO2 != 0 ) |
| 201 | 1163 { |
| 276 | 1164 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
| 1165 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
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1166 // ppWater in the equations below: |
| 321 | 1167 deco_diluent -= const_ppO2; |
| 276 | 1168 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
| 212 | 1169 |
| 1170 if (deco_diluent > temp_deco) | |
| 1171 deco_diluent = temp_deco; | |
| 201 | 1172 } |
| 1173 | |
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1174 if( deco_diluent > ppWater ) |
| 201 | 1175 { |
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1176 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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1177 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
| 201 | 1178 } |
| 1179 else | |
| 1180 { | |
| 236 | 1181 ppN2 = 0.0; |
| 201 | 1182 ppHe = 0.0; |
| 1183 } | |
| 236 | 1184 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
| 201 | 1185 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
| 1186 } | |
| 1187 | |
| 1188 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 1189 // clear_tissue |
| 1190 // | |
| 165 | 1191 // optimized in v.101 (var_N2_a) |
| 167 | 1192 // |
| 1193 // preload tissues with standard pressure for the given ambient pressure. | |
| 1194 // Note: fixed N2_ratio for standard air. | |
| 201 | 1195 // |
| 167 | 1196 static void clear_tissue(void) |
| 116 | 1197 { |
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1198 overlay float p; |
| 116 | 1199 flag_in_divemode = 0; |
| 1200 int_O_DBS_bitfield = 0; | |
| 1201 int_O_DBS2_bitfield = 0; | |
| 1202 int_O_DBG_pre_bitfield = 0; | |
| 1203 int_O_DBG_post_bitfield = 0; | |
| 1204 char_O_NDL_at_20mtr = 255; | |
| 1205 | |
| 167 | 1206 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
| 1207 N2_ratio = 0.7902; | |
| 212 | 1208 pres_respiration = int_I_pres_respiration * 0.001; |
| 164 | 1209 |
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1210 p = N2_ratio * (pres_respiration - ppWater); |
| 338 | 1211 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1212 { |
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1213 // cycle through the 16 Bühlmann N2 tissues |
| 339 | 1214 pres_tissue_N2[ci] = p; |
| 197 | 1215 |
| 1216 // cycle through the 16 Bühlmann tissues for Helium | |
| 339 | 1217 pres_tissue_He[ci] = 0.0; |
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1218 } |
| 116 | 1219 |
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1220 clear_deco_table(); |
| 126 | 1221 char_O_deco_status = 0; |
| 1222 char_O_nullzeit = 0; | |
| 168 | 1223 int_O_ascenttime = 0; |
| 126 | 1224 char_O_gradient_factor = 0; |
| 1225 char_O_relative_gradient_GF = 0; | |
| 197 | 1226 char_I_depth_last_deco = 0; // for compatibility with v.101pre_no_last_deco |
| 258 | 1227 |
| 1228 calc_lead_tissue_limit = 0.0; | |
| 1229 char_O_gtissue_no = 0; | |
| 167 | 1230 } |
| 116 | 1231 |
| 167 | 1232 ////////////////////////////////////////////////////////////////////////////// |
| 1233 // calc_hauptroutine | |
| 1234 // | |
| 1235 // this is the major code in dive mode calculates: | |
| 116 | 1236 // the tissues, |
| 167 | 1237 // the bottom time, |
| 1238 // and simulates the ascend with all deco stops. | |
| 171 | 1239 // |
| 1240 // The deco_state sequence is : | |
| 1241 // 3 (at surface) | |
| 1242 // +---> 0 : calc nullzeit | |
| 1243 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 1244 // | +-> 1 : simulate up to 16min of stops. | |
| 1245 // | +------< not finished | |
| 1246 // +--------< finish | |
| 1247 // | |
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1248 // Added steps 6,5 for @+5 calculation: |
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1249 // 6 = ascent to first stop (same as 2), except continue to 7 |
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1250 // 7 = same as 1, except loop to 7. |
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1251 // |
| 167 | 1252 static void calc_hauptroutine(void) |
| 116 | 1253 { |
| 241 | 1254 static unsigned char backup_gas_used = 0; |
| 1255 static unsigned char backup_gas_depth = 0; | |
| 217 | 1256 static unsigned char backup_gas_delay = 0; |
| 186 | 1257 |
| 116 | 1258 calc_hauptroutine_data_input(); |
| 1259 | |
| 1260 if(!flag_in_divemode) | |
| 1261 { | |
| 1262 flag_in_divemode = 1; | |
| 1263 create_dbs_set_dbg_and_ndl20mtr(); | |
| 1264 } | |
| 1265 else | |
| 1266 check_pre_dbg(); | |
| 1267 | |
| 1268 calc_hauptroutine_update_tissues(); | |
| 1269 calc_gradient_factor(); | |
| 1270 | |
| 167 | 1271 // toggle between calculation for nullzeit (bottom time), |
| 1272 // deco stops | |
| 1273 // and more deco stops (continue) | |
| 1274 switch( char_O_deco_status ) | |
| 116 | 1275 { |
| 186 | 1276 case 3: //---- At surface: start a new dive ------------------------------ |
| 1277 clear_deco_table(); | |
| 1278 copy_deco_table(); | |
| 200 | 1279 int_O_ascenttime = 0; // Reset DTR. |
| 323 | 1280 int_O_extra_ascenttime = 0; |
| 200 | 1281 char_O_nullzeit = 0; // Reset bottom time. |
| 278 | 1282 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
| 201 | 1283 |
| 217 | 1284 // Values that should be reset just once for the full real dive. |
| 1285 // This is used to record the lowest stop for the whole dive, | |
| 1286 // Including ACCROSS all simulated ascent. | |
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1287 low_depth = 0.0; |
| 217 | 1288 |
| 1289 // Reset gas switch history. | |
| 241 | 1290 backup_gas_used = sim_gas_last_used = 0; |
| 1291 backup_gas_depth = sim_gas_last_depth = 0; | |
| 217 | 1292 backup_gas_delay = sim_gas_delay = 0; |
| 203 | 1293 sim_dive_mins = 0; |
| 1294 break; | |
| 186 | 1295 |
| 167 | 1296 case 0: //---- bottom time ----------------------------------------------- |
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1297 default: |
| 509 | 1298 gas_switch_find_current(); // Lookup for current gas & time. |
| 1299 gas_switch_set(); // setup calc_ratio's | |
| 1300 | |
| 167 | 1301 calc_nullzeit(); |
| 1302 check_ndl(); | |
| 186 | 1303 char_O_deco_status = 2; // calc ascent next time. |
| 1304 break; | |
| 1305 | |
| 1306 case 2: //---- Simulate ascent to first stop ----------------------------- | |
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1307 case 6: // @+5min variation |
| 203 | 1308 // Check proposed gas at begin of ascent simulation |
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1309 sim_dive_mins = int_I_divemins; // Init current time. |
| 241 | 1310 |
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1311 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1312 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
| 203 | 1313 backup_gas_delay = sim_gas_delay; |
| 186 | 1314 |
| 1315 sim_ascent_to_first_stop(); | |
| 201 | 1316 |
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1317 // Calc stops next time (deco or gas switch). |
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1318 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
| 167 | 1319 break; |
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1320 |
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1321 case 1: //---- Simulate stops -------------------------------------------- |
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1322 case 5: // @+5 variation. |
| 167 | 1323 calc_hauptroutine_calc_deco(); |
| 186 | 1324 |
| 1325 // If simulation is finished, restore the GF low reference, so that | |
| 1326 // next ascent simulation is done from the current depth: | |
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1327 if( (char_O_deco_status & 3) == 0 ) |
| 186 | 1328 { |
| 241 | 1329 sim_gas_last_used = backup_gas_used; |
| 1330 sim_gas_last_depth = backup_gas_depth; | |
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1331 sim_gas_delay = backup_gas_delay; |
| 186 | 1332 } |
| 167 | 1333 break; |
| 116 | 1334 } |
| 167 | 1335 |
| 116 | 1336 check_post_dbg(); |
| 1337 } | |
| 1338 | |
| 167 | 1339 ////////////////////////////////////////////////////////////////////////////// |
| 1340 // calc_hauptroutine_data_input | |
| 1341 // | |
| 1342 // Reset all C-code dive parameters from their ASM-code values. | |
| 1343 // Detect gas change condition. | |
| 1344 // | |
| 116 | 1345 void calc_hauptroutine_data_input(void) |
| 1346 { | |
| 203 | 1347 overlay short int_temp; |
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1348 overlay unsigned char g; |
| 126 | 1349 |
| 197 | 1350 pres_respiration = int_I_pres_respiration * 0.001; |
| 1351 pres_surface = int_I_pres_surface * 0.001; | |
| 1352 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1353 He_ratio = char_I_He_ratio * 0.01; | |
| 1354 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
| 116 | 1355 |
| 126 | 1356 // ____________________________________________________ |
| 1357 // | |
| 1358 // _____________ G A S _ C H A N G E S ________________ | |
| 1359 // ____________________________________________________ | |
| 1360 | |
| 212 | 1361 // Keep a margin of 150mbar = 1.50m |
| 1362 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1363 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 126 | 1364 |
| 203 | 1365 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
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1366 for(g=0; g < NUM_GAS; ++g) |
| 126 | 1367 { |
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1368 deco_gas_change[g] = 0; |
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1369 if(char_I_deco_gas_change[g]) |
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1370 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) |
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1371 deco_gas_change[g] = char_I_deco_gas_change[g]; |
| 126 | 1372 } |
| 116 | 1373 |
| 197 | 1374 const_ppO2 = char_I_const_ppO2 * 0.01; |
| 1375 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1376 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1377 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1378 GF_high = char_I_GF_High_percentage * 0.01; | |
| 126 | 1379 GF_delta = GF_high - GF_low; |
| 116 | 1380 } |
| 1381 | |
| 167 | 1382 ////////////////////////////////////////////////////////////////////////////// |
| 171 | 1383 // |
| 1384 // | |
| 116 | 1385 void calc_hauptroutine_update_tissues(void) |
| 1386 { | |
| 197 | 1387 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
| 1388 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
| 1389 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
| 237 | 1390 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1391 |
| 276 | 1392 pres_diluent = pres_respiration; |
| 307 | 1393 if( char_I_const_ppO2 != 0 ) // new in v.101 |
| 186 | 1394 { |
| 322 | 1395 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
| 1396 | |
| 276 | 1397 pres_diluent -= const_ppO2; // new in v.101 |
| 1398 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
| 321 | 1399 if( pres_diluent < 0.0 ) |
| 1400 pres_diluent = 0.0; | |
| 276 | 1401 if( pres_diluent > pres_respiration ) // new in v.101 |
| 1402 pres_diluent = pres_respiration; // new in v.101 | |
| 307 | 1403 |
| 321 | 1404 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
| 322 | 1405 |
| 326 | 1406 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
| 322 | 1407 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
| 1408 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
| 186 | 1409 } |
| 307 | 1410 |
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1411 if( pres_diluent > ppWater ) // new in v.101 |
| 116 | 1412 { |
| 307 | 1413 overlay float EAD, END; |
| 1414 | |
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1415 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1416 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
| 307 | 1417 |
| 1418 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
| 1419 // with plain air. | |
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1420 // ppN2 = 79% * (P_EAD - ppWater) |
| 307 | 1421 // EAD = (P_EAD - Psurface) * 10 |
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1422 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
| 317 | 1423 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
| 307 | 1424 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
| 317 | 1425 char_O_EAD = (unsigned char)(EAD + 0.5); |
| 307 | 1426 |
| 1427 // END : Equivalent Narcotic Dive. | |
| 1428 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
| 1429 // 0.23 btw). Hence the formula becomes: | |
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1430 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
| 317 | 1431 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
| 307 | 1432 // |
| 1433 // Source cited: | |
| 1434 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
| 1435 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
| 317 | 1436 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
| 307 | 1437 if( END < 0.0 || END > 245.5 ) END = 0.0; |
| 317 | 1438 char_O_END = (unsigned char)(END + 0.5); |
| 116 | 1439 } |
| 167 | 1440 else // new in v.101 |
| 116 | 1441 { |
| 236 | 1442 ppN2 = 0.0; // new in v.101 |
| 200 | 1443 ppHe = 0.0; // new in v.101 |
| 307 | 1444 char_O_EAD = char_O_END = 0; |
| 116 | 1445 } |
| 1446 | |
| 1447 if(!char_I_step_is_1min) | |
| 192 | 1448 calc_tissue(0); |
| 116 | 1449 else |
| 192 | 1450 calc_tissue(1); |
| 186 | 1451 |
| 192 | 1452 // Calc limit for surface, ie. GF_high. |
| 258 | 1453 calc_limit(); |
| 186 | 1454 |
| 203 | 1455 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
| 339 | 1456 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
| 192 | 1457 |
| 1458 // if guiding tissue can not be exposed to surface pressure immediately | |
| 1459 if( calc_lead_tissue_limit > pres_surface && char_O_deco_status == 0) | |
| 116 | 1460 { |
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1461 char_O_nullzeit = 0; // deco necessary |
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1462 char_O_deco_status = 2; // calculate ascent on next iteration. |
| 116 | 1463 } |
| 171 | 1464 } |
| 1465 | |
| 116 | 1466 |
| 167 | 1467 ////////////////////////////////////////////////////////////////////////////// |
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1468 // Compute stops. |
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1469 // |
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1470 // Note: because this can be very long, break on 16 iterations, and set state |
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1471 // to 0 when finished, or to 1 when needing to continue. |
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1472 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
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1473 // break the loop when total time > 512msec. |
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1474 // |
| 116 | 1475 void calc_hauptroutine_calc_deco(void) |
| 1476 { | |
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1477 overlay unsigned char loop; |
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1478 |
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1479 for(loop = 0; loop < 16; ++loop) |
| 116 | 1480 { |
|
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1481 // Limit loops to 512ms, using the RTC timer 3: |
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1482 if( tmr3() & (512*32) ) |
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1483 break; |
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1484 |
| 241 | 1485 // Do not ascent while doing a gas switch ? |
| 203 | 1486 if( sim_gas_delay <= sim_dive_mins ) |
| 1487 { | |
| 241 | 1488 if( calc_nextdecodepth() ) |
| 1489 { | |
| 1490 if( temp_depth_limit == 0 ) | |
| 1491 goto Surface; | |
| 116 | 1492 |
| 241 | 1493 //---- We hit a stop at temp_depth_limit --------------------- |
| 317 | 1494 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
| 241 | 1495 + pres_surface; // To absolute. |
| 471 | 1496 if( !update_deco_table() ) // Adds a one minute stops. |
| 1497 goto Surface; // Deco table full: abort... | |
| 241 | 1498 } |
| 1499 else | |
| 1500 { | |
| 1501 //---- No stop ----------------------------------------------- | |
| 317 | 1502 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
|
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1503 |
| 241 | 1504 //---- Finish computations once surface is reached ----------- |
| 1505 if( temp_deco <= pres_surface ) | |
| 1506 { | |
| 1507 Surface: | |
| 471 | 1508 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
|
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1509 copy_deco_table(); |
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1510 |
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1511 calc_ascenttime(); |
| 471 | 1512 char_O_deco_status = 0; // calc nullzeit next time. |
| 1513 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
| 241 | 1514 return; |
| 1515 } | |
| 1516 } | |
| 212 | 1517 } |
| 1518 else | |
|
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1519 { |
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1520 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1521 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
| 471 | 1522 if( !update_deco_table() ) // Just pass one minute. |
| 1523 goto Surface; // Deco table full: abort... | |
|
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1524 } |
| 197 | 1525 |
| 241 | 1526 //---- Then update tissue -------------------------------------------- |
| 203 | 1527 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1528 gas_switch_set(); // Apply any simulated gas change, once validated. |
| 212 | 1529 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
| 192 | 1530 sim_tissue(1); // Simulate compartiments for 1 minute. |
| 116 | 1531 } |
|
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1532 |
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1533 // Surface not reached, need more stops... |
| 278 | 1534 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
| 116 | 1535 } |
| 1536 | |
| 167 | 1537 ////////////////////////////////////////////////////////////////////////////// |
|
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1538 // Simulation ascention to first deco stop. |
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1539 // |
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1540 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1541 // there is no need to break on more that 16 iterations |
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1542 // (or we are already in deep shit). |
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1543 // |
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1544 // Input: pres_respiration |
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1545 // Output: temp_deco |
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1546 // |
|
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1547 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1548 // before ascent. |
|
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1549 void sim_ascent_to_first_stop(void) |
| 116 | 1550 { |
| 171 | 1551 update_startvalues(); |
|
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1552 clear_deco_table(); |
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1553 |
| 200 | 1554 temp_deco = pres_respiration; // Starts from current real depth. |
|
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1555 |
|
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1556 // Are we doing the special @+5min variation ? |
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1557 if(char_O_deco_status & 4) |
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1558 sim_extra_time(); |
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1559 |
| 212 | 1560 // Do we have a gas switch going on ? |
| 1561 if( sim_gas_delay > sim_dive_mins ) | |
| 1562 return; | |
| 1563 | |
| 241 | 1564 //---- Loop until first stop, gas switch, or surface is reached ---------- |
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1565 for(;;) |
| 116 | 1566 { |
| 461 | 1567 overlay float old_deco = temp_deco; // Pamb backup (bars) |
| 460 | 1568 |
| 241 | 1569 // Try ascending 1 full minute. |
| 461 | 1570 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. |
| 1571 if( temp_deco < pres_surface ) // But don't go over surface. | |
| 1572 temp_deco = pres_surface; | |
| 203 | 1573 |
| 461 | 1574 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because |
| 1575 // one minute passed. | |
| 212 | 1576 sim_limit(GF_low); |
| 1577 | |
| 1578 // Did we reach deepest remaining stop ? | |
| 241 | 1579 if( temp_deco < sim_lead_tissue_limit ) |
| 212 | 1580 { |
| 461 | 1581 temp_deco = old_deco; // Restore last correct depth, |
| 1582 break; // Do no spend a minute more. | |
| 212 | 1583 } |
| 1584 | |
| 203 | 1585 // Did we reach surface ? |
| 460 | 1586 // NOTE: we should round BEFORE checking surface is reached. |
| 461 | 1587 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
| 1588 if( temp_depth_limit == 0 ) | |
| 203 | 1589 { |
| 1590 temp_deco = pres_surface; // Yes: finished ! | |
| 1591 break; | |
| 1592 } | |
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1593 |
| 241 | 1594 // Check for gas change below new depth ? |
| 1595 if( gas_switch_deepest() ) | |
| 1596 { | |
|
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1597 assert( temp_depth_limit > 0); |
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1598 |
| 317 | 1599 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
| 212 | 1600 break; |
| 241 | 1601 } |
| 171 | 1602 |
| 203 | 1603 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1604 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
| 203 | 1605 sim_tissue(1); // and update tissues for 1 min. |
| 1606 } | |
| 167 | 1607 } |
| 116 | 1608 |
| 167 | 1609 ////////////////////////////////////////////////////////////////////////////// |
|
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1610 // Simulation extra time at the current depth. |
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1611 // |
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1612 // This routine is used for @+5min feature. |
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1613 void sim_extra_time(void) |
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1614 { |
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1615 overlay unsigned char extra = read_custom_function(58); |
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1616 do { |
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1617 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1618 sim_tissue(1); // and update tissues for 1 min. |
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1619 } while( --extra != 0 ); |
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1620 } |
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1621 |
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1622 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 1623 // calc_tissue |
| 1624 // | |
| 116 | 1625 // optimized in v.101 |
| 167 | 1626 // |
| 184 | 1627 static void calc_tissue(PARAMETER unsigned char period) |
| 116 | 1628 { |
| 251 | 1629 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1630 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1631 |
| 338 | 1632 for (ci=0;ci<NUM_COMP;ci++) |
| 126 | 1633 { |
| 258 | 1634 read_buhlmann_times(period); // 2 sec or 1 min period. |
| 116 | 1635 |
| 126 | 1636 // N2 |
| 339 | 1637 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1638 temp_tissue_safety(); |
| 339 | 1639 pres_tissue_N2[ci] += temp_tissue; |
| 165 | 1640 |
| 126 | 1641 // He |
| 339 | 1642 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
| 126 | 1643 temp_tissue_safety(); |
| 339 | 1644 pres_tissue_He[ci] += temp_tissue; |
| 192 | 1645 } |
| 167 | 1646 } |
| 116 | 1647 |
| 167 | 1648 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1649 // calc_limit |
| 167 | 1650 // |
| 192 | 1651 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
| 167 | 1652 // |
| 258 | 1653 static void calc_limit(void) |
| 167 | 1654 { |
| 192 | 1655 char_O_gtissue_no = 255; |
| 1656 calc_lead_tissue_limit = 0.0; | |
| 1657 | |
| 338 | 1658 for(ci=0; ci<NUM_COMP;ci++) |
| 192 | 1659 { |
| 339 | 1660 overlay float N2 = pres_tissue_N2[ci]; |
| 1661 overlay float He = pres_tissue_He[ci]; | |
|
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1662 overlay float p = N2 + He; |
| 192 | 1663 |
| 258 | 1664 read_buhlmann_coefficients(); |
|
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1665 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1666 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
| 116 | 1667 |
| 192 | 1668 // Apply the Eric Baker's varying gradient factor correction. |
| 1669 // Note: the correction factor depends both on GF and b, | |
| 1670 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1671 // so that can change who is the leading gas... | |
| 1672 // Note: Also depends of the GF. So the calcul is different for | |
| 1673 // GF_low, current GF, or GF_high... | |
| 1674 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1675 // hence what would happend at surface, | |
| 1676 // hence at GF_high. | |
| 509 | 1677 if( char_I_deco_model != 0 ) |
| 258 | 1678 p = ( p - var_N2_a * GF_high) * var_N2_b |
| 1679 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
| 192 | 1680 else |
| 1681 p = (p - var_N2_a) * var_N2_b; | |
| 258 | 1682 if( p < 0.0 ) p = 0.0; |
| 192 | 1683 |
| 1684 if( p > calc_lead_tissue_limit ) | |
| 1685 { | |
| 1686 char_O_gtissue_no = ci; | |
| 1687 calc_lead_tissue_limit = p; | |
| 1688 } | |
| 1689 } | |
| 197 | 1690 |
| 338 | 1691 assert( char_O_gtissue_no < NUM_COMP ); |
| 197 | 1692 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
| 167 | 1693 } |
| 1694 | |
| 1695 ////////////////////////////////////////////////////////////////////////////// | |
| 1696 // calc_nullzeit | |
| 1697 // | |
| 1698 // calculates the remaining bottom time | |
| 1699 // | |
|
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1700 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second |
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1701 // exponential term to the M-value equation, making it impossible to |
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1702 // invert... So we have to make a fast-simu until we find a better way. |
| 509 | 1703 // |
| 1704 // Input: pres_respiration | |
| 1705 // Output: char_O_nullzeit | |
| 167 | 1706 // |
| 1707 static void calc_nullzeit(void) | |
| 1708 { | |
|
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1709 //---- Compute ppN2 and ppHe --------------------------------------------- |
| 509 | 1710 temp_deco = pres_respiration; |
| 1711 sim_alveolar_presures(); | |
| 167 | 1712 |
| 509 | 1713 char_O_nullzeit = 240; |
| 1714 for(ci=0; ci<NUM_COMP; ci++) | |
| 1715 { | |
|
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1716 //---- Read A/B values and loading factor for N2 and He -------------- |
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1717 overlay float tN2 = pres_tissue_N2[ci]; |
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1718 overlay float tHe = pres_tissue_He[ci]; |
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1719 overlay float t = tN2 + tHe; |
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1720 overlay unsigned char ndl; |
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1721 overlay unsigned char period = 10; |
| 192 | 1722 |
| 509 | 1723 read_buhlmann_coefficients(); |
|
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1724 read_buhlmann_times(2); // Starts with a 10min period. |
| 509 | 1725 |
|
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1726 //---- Simulate for that tissue -------------------------------------- |
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1727 // NOTE: No need to simulate for longuer than the already found NDL. |
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1728 for(ndl=0; ndl<char_O_nullzeit;) |
| 509 | 1729 { |
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1730 //---- Compute updated mix M-value at surface |
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1731 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; |
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1732 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; |
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1733 overlay float M0 = (a + pres_surface/b); |
| 116 | 1734 |
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1735 //---- Add 10min/1min to N2/He tissues |
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1736 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; |
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1737 overlay float dTHe = (ppHe - tHe) * var_He_e; |
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1738 |
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1739 //---- Apply security margin when using the non-GF model |
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1740 if( char_I_deco_model == 0 ) |
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1741 { |
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1742 dTN2 *= float_saturation_multiplier; |
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1743 dTHe *= float_saturation_multiplier; |
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1744 } |
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1745 else // Or GF-based model |
| 509 | 1746 M0 = GF_high * (M0 - pres_surface) + pres_surface; |
| 167 | 1747 |
|
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1748 //---- Simulate off-gasing while going to surface |
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1749 // TODO ! |
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1750 // dTN2 -= exp( ... ascent time ... ppN2...) |
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1751 // dTHe -= exp( ... ascent time ... ppHe...) |
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1752 |
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1753 //---- Still ok to surface after 1 or 10 minutes ? |
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1754 if( t + dTN2 + dTHe <= M0 ) |
| 509 | 1755 { |
|
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1756 tN2 += dTN2; // YES: apply gas loadings, |
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1757 tHe += dTHe; |
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1758 t = tN2 + tHe; |
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1759 ndl += period; // increment NDL, |
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1760 continue; // and loop. |
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1761 } |
| 116 | 1762 |
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1763 //---- Should we retry with smaller steps ? |
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1764 if( period == 10 ) |
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1765 { |
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1766 read_buhlmann_times(1); // 1min coefs. |
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1767 period = 1; |
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1768 continue; |
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1769 } |
| 167 | 1770 |
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1771 //---- ELSE make a linear approx for the last minute |
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1772 // Usefull to have a meneaingfull rounding of NDL |
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1773 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); |
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1774 break; |
| 509 | 1775 } |
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1776 |
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1777 // Keep the shortest NDL found |
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1778 if( ndl < char_O_nullzeit ) |
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1779 char_O_nullzeit = ndl; |
| 339 | 1780 } |
| 167 | 1781 } |
| 116 | 1782 |
| 167 | 1783 ////////////////////////////////////////////////////////////////////////////// |
| 1784 // calc_ascenttime | |
| 1785 // | |
|
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1786 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1787 // and all stops. |
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1788 // |
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1789 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
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1790 static void calc_ascenttime(void) |
| 116 | 1791 { |
| 323 | 1792 overlay unsigned char x; |
| 1793 overlay unsigned short sum; | |
| 168 | 1794 |
| 323 | 1795 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
| 1796 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
| 1797 if (ascent < 0.0) | |
| 1798 ascent = 0.0; | |
| 1799 sum = (unsigned short)(ascent + 0.99); | |
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1800 |
| 338 | 1801 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
| 323 | 1802 sum += (unsigned short)internal_deco_time[x]; |
| 1803 | |
| 1804 if( char_O_deco_status == 1 ) | |
| 1805 int_O_ascenttime = sum; | |
| 126 | 1806 else |
| 323 | 1807 int_O_extra_ascenttime = sum; |
| 167 | 1808 } |
| 116 | 1809 |
| 167 | 1810 ////////////////////////////////////////////////////////////////////////////// |
| 1811 // update_startvalues | |
| 1812 // | |
| 116 | 1813 // updated in v.102 |
| 167 | 1814 // |
| 116 | 1815 void update_startvalues(void) |
| 1816 { | |
| 167 | 1817 overlay unsigned char x; |
| 116 | 1818 |
| 201 | 1819 // Start ascent simulation with current tissue partial pressures. |
| 339 | 1820 for(x=0; x<NUM_COMP; x++) |
| 116 | 1821 { |
| 339 | 1822 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
| 1823 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
| 116 | 1824 } |
| 197 | 1825 |
| 201 | 1826 // No leading tissue (yet) for this ascent simulation. |
| 197 | 1827 sim_lead_tissue_limit = 0.0; |
| 1828 sim_lead_tissue_no = 255; | |
| 167 | 1829 } |
| 116 | 1830 |
| 167 | 1831 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1832 // sim_tissue |
| 167 | 1833 // |
| 116 | 1834 // optimized in v.101 |
| 167 | 1835 // |
| 1836 // Function very simular to calc_tissue, but: | |
| 1837 // + Use a 1min or 10min period. | |
| 1838 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 184 | 1839 static void sim_tissue(PARAMETER unsigned char period) |
| 116 | 1840 { |
| 251 | 1841 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1842 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1843 |
| 338 | 1844 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1845 { |
| 258 | 1846 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
| 165 | 1847 |
| 126 | 1848 // N2 |
| 339 | 1849 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1850 temp_tissue_safety(); |
| 339 | 1851 sim_pres_tissue_N2[ci] += temp_tissue; |
| 126 | 1852 |
| 1853 // He | |
| 339 | 1854 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
| 126 | 1855 temp_tissue_safety(); |
| 339 | 1856 sim_pres_tissue_He[ci] += temp_tissue; |
| 192 | 1857 } |
| 167 | 1858 } |
| 116 | 1859 |
| 167 | 1860 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1861 // sim_limit() |
| 1862 // | |
| 1863 // New in v.111 | |
| 1864 // | |
| 1865 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1866 // different depth, because it depends on current gradient factor. | |
| 167 | 1867 // |
| 192 | 1868 static void sim_limit(PARAMETER float GF_current) |
| 116 | 1869 { |
| 212 | 1870 assert( 0.0 < GF_current && GF_current <= 1.0f); |
| 1871 | |
| 192 | 1872 sim_lead_tissue_limit = 0.0; |
| 212 | 1873 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
| 192 | 1874 |
| 338 | 1875 for(ci=0; ci<NUM_COMP; ci++) |
| 192 | 1876 { |
| 339 | 1877 overlay float N2 = sim_pres_tissue_N2[ci]; |
| 1878 overlay float He = sim_pres_tissue_He[ci]; | |
| 241 | 1879 overlay float p = N2 + He; |
| 192 | 1880 |
| 258 | 1881 read_buhlmann_coefficients(); |
| 241 | 1882 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
| 1883 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 192 | 1884 |
| 1885 // Apply the Eric Baker's varying gradient factor correction. | |
| 1886 // Note: the correction factor depends both on GF and b, | |
| 1887 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1888 // so that can change who is the leading gas... | |
| 1889 // Note: Also depends of the GF_current... | |
| 509 | 1890 if( char_I_deco_model != 0 ) |
| 302 | 1891 p = ( p - var_N2_a * GF_current) |
| 1892 / (GF_current / var_N2_b + 1.0 - GF_current); | |
| 192 | 1893 else |
| 1894 p = (p - var_N2_a) * var_N2_b; | |
| 237 | 1895 if( p < 0.0 ) p = 0.0; |
| 192 | 1896 |
| 1897 if( p > sim_lead_tissue_limit ) | |
| 1898 { | |
| 1899 sim_lead_tissue_no = ci; | |
| 1900 sim_lead_tissue_limit = p; | |
| 1901 } | |
| 1902 } // for ci | |
| 197 | 1903 |
| 338 | 1904 assert( sim_lead_tissue_no < NUM_COMP ); |
| 237 | 1905 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
| 167 | 1906 } |
| 116 | 1907 |
| 167 | 1908 ////////////////////////////////////////////////////////////////////////////// |
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1909 // clear_deco_table |
| 167 | 1910 // |
| 1911 // unchanged in v.101 | |
| 1912 // | |
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1913 static void clear_deco_table(void) |
| 116 | 1914 { |
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1915 overlay unsigned char x; |
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1916 |
| 338 | 1917 for(x=0; x<NUM_STOPS; ++x) |
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1918 { |
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1919 internal_deco_time [x] = 0; |
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1920 internal_deco_depth[x] = 0; |
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1921 } |
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1922 } |
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1923 |
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1924 ////////////////////////////////////////////////////////////////////////////// |
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1925 // update_deco_table |
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1926 // |
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1927 // Add 1 min to current stop. |
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1928 // |
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1929 // Inputs: |
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1930 // temp_depth_limit = stop's depth, in meters. |
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1931 // In/Out: |
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1932 // internal_deco_depth[] : depth (in metres) of each stops. |
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1933 // internal_deco_time [] : time (in minutes) of each stops. |
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1934 // |
| 471 | 1935 static unsigned char update_deco_table() |
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1936 { |
| 192 | 1937 overlay unsigned char x; |
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1938 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1939 assert( temp_depth_limit > 0 ); // No stop at surface... |
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1940 |
| 338 | 1941 for(x=0; x<NUM_STOPS; ++x) |
| 192 | 1942 { |
| 212 | 1943 // Make sure deco-stops are recorded in order: |
|
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1944 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
| 212 | 1945 |
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1946 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
| 192 | 1947 { |
| 1948 // Do not overflow (max 255') | |
| 1949 if( internal_deco_time[x] < 255 ) | |
| 1950 { | |
| 1951 internal_deco_time[x]++; | |
| 471 | 1952 return 1; |
| 192 | 1953 } |
| 1954 // But store extra in the next stop... | |
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1955 } |
| 192 | 1956 |
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1957 if( internal_deco_depth[x] == 0 ) |
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1958 { |
| 192 | 1959 internal_deco_depth[x] = temp_depth_limit; |
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1960 if( sim_gas_delay > sim_dive_mins ) |
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1961 internal_deco_depth[x] |= 0x80; |
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1962 |
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1963 internal_deco_time[x] = 1; |
| 471 | 1964 return 1; |
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1965 } |
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1966 } |
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1967 |
| 192 | 1968 // Can't store stops at more than 96m. |
| 1969 // Or stops at less that 3m too. | |
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1970 // Just do nothing with that... |
| 471 | 1971 return 0; |
| 167 | 1972 } |
| 116 | 1973 |
| 167 | 1974 ////////////////////////////////////////////////////////////////////////////// |
| 1975 // calc_gradient_factor | |
| 1976 // | |
| 165 | 1977 // optimized in v.101 (var_N2_a) |
| 116 | 1978 // new code in v.102 |
| 167 | 1979 // |
| 1980 static void calc_gradient_factor(void) | |
| 116 | 1981 { |
| 197 | 1982 overlay float gf; |
| 339 | 1983 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
| 1984 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
| 237 | 1985 |
| 338 | 1986 assert( char_O_gtissue_no < NUM_COMP ); |
| 237 | 1987 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1988 |
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1989 // tissue > respiration (currently off-gasing) |
| 302 | 1990 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
| 1991 // GF = 100% when respiration == limit. | |
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1992 temp_tissue = N2 + He; |
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1993 if( temp_tissue <= pres_respiration ) |
| 197 | 1994 gf = 0.0; |
| 1995 else | |
| 1996 { | |
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1997 overlay float limit = calc_lead_tissue_limit; |
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1998 // NOTE: in GF model, calc_lead_tissue_limit include already the |
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1999 // correction due to gradient factor. To compute the actual |
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2000 // current GF, we need to (re-)compute the raw ambiant-pressure |
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2001 // limit from the Bühlmann model. |
| 509 | 2002 if( char_I_deco_model != 0 ) |
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2003 { |
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2004 ci = char_O_gtissue_no; |
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2005 read_buhlmann_coefficients(); |
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2006 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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2007 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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2008 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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2009 } |
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2010 |
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2011 gf = (temp_tissue - pres_respiration) |
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2012 / (temp_tissue - limit) |
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2013 * 100.0; |
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2014 if( gf > 254.5 ) gf = 255.0; |
| 197 | 2015 if( gf < 0.0 ) gf = 0.0; |
| 2016 } | |
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2017 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
| 116 | 2018 |
| 509 | 2019 if( char_I_deco_model != 0 ) // calculate relative gradient factor |
| 116 | 2020 { |
| 197 | 2021 overlay float rgf; |
| 2022 | |
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2023 if( low_depth < 1.5 ) |
| 197 | 2024 rgf = GF_high; |
| 2025 else | |
| 2026 { | |
| 317 | 2027 overlay float temp1 = low_depth * METER_TO_BAR; |
| 197 | 2028 overlay float temp2 = pres_respiration - pres_surface; |
| 186 | 2029 |
| 197 | 2030 if (temp2 <= 0) |
| 2031 rgf = GF_high; | |
| 2032 else if (temp2 >= temp1) | |
| 2033 rgf = GF_low; | |
| 2034 else | |
| 2035 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 2036 } | |
| 186 | 2037 |
| 197 | 2038 rgf = gf / rgf; // gf is already in percent |
| 2039 if( rgf < 0.0 ) rgf = 0.0; | |
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2040 if( rgf > 254.5 ) rgf = 255.0; |
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2041 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
| 116 | 2042 } // calc relative gradient factor |
| 2043 else | |
| 2044 { | |
| 186 | 2045 char_O_relative_gradient_GF = char_O_gradient_factor; |
| 116 | 2046 } |
| 167 | 2047 } |
| 116 | 2048 |
| 167 | 2049 ////////////////////////////////////////////////////////////////////////////// |
| 2050 // deco_calc_desaturation_time | |
| 2051 // | |
| 116 | 2052 // FIXED N2_ratio |
| 2053 // unchanged in v.101 | |
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2054 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
| 233 | 2055 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
| 167 | 2056 // |
| 116 | 2057 void deco_calc_desaturation_time(void) |
| 2058 { | |
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2059 RESET_C_STACK |
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2060 |
| 233 | 2061 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 2062 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 2063 | |
| 237 | 2064 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
| 233 | 2065 pres_surface = int_I_pres_surface * 0.001; |
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2066 ppN2 = N2_ratio * (pres_surface - ppWater); |
| 126 | 2067 int_O_desaturation_time = 0; |
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2068 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 233 | 2069 |
| 339 | 2070 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 2071 { |
| 251 | 2072 overlay unsigned short desat_time; // For a particular compartiment, in min. |
| 2073 overlay float temp1; | |
| 2074 overlay float temp2; | |
| 2075 overlay float temp3; | |
| 2076 overlay float temp4; | |
| 338 | 2077 |
| 509 | 2078 read_buhlmann_ht(); |
| 338 | 2079 |
| 126 | 2080 // saturation_time (for flight) and N2_saturation in multiples of halftime |
| 2081 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 2082 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
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2083 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
| 126 | 2084 // N2 |
| 339 | 2085 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
| 2086 temp2 = ppN2 - pres_tissue_N2[ci]; | |
| 126 | 2087 if (temp2 >= 0.0) |
| 2088 { | |
| 233 | 2089 temp1 = 0.0; |
| 2090 temp2 = 0.0; | |
| 126 | 2091 } |
| 2092 else | |
| 2093 temp1 = temp1 / temp2; | |
| 251 | 2094 if( 0.0 < temp1 && temp1 < 1.0 ) |
| 126 | 2095 { |
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2096 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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2097 // minus because log is negative. |
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2098 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
| 509 | 2099 temp2 = var_N2_ht * temp1 / float_desaturation_multiplier; // time necessary (in minutes ) for complete desaturation (see comment about 5 percent) , new in v.101: float_desaturation_multiplier |
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2100 |
| 126 | 2101 } |
| 2102 else | |
| 2103 { | |
| 233 | 2104 temp1 = 0.0; |
| 2105 temp2 = 0.0; | |
| 126 | 2106 } |
| 116 | 2107 |
| 126 | 2108 // He |
| 339 | 2109 temp3 = 0.1 - pres_tissue_He[ci]; |
| 126 | 2110 if (temp3 >= 0.0) |
| 2111 { | |
| 233 | 2112 temp3 = 0.0; |
| 2113 temp4 = 0.0; | |
| 126 | 2114 } |
| 2115 else | |
| 339 | 2116 temp3 = - temp3 / pres_tissue_He[ci]; |
| 251 | 2117 if( 0.0 < temp3 && temp3 < 1.0 ) |
| 126 | 2118 { |
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2119 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
| 126 | 2120 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
| 2121 // minus because log is negative | |
| 509 | 2122 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
| 126 | 2123 } |
| 2124 else | |
| 2125 { | |
| 233 | 2126 temp3 = 0.0; |
| 2127 temp4 = 0.0; | |
| 126 | 2128 } |
| 116 | 2129 |
| 126 | 2130 // saturation_time (for flight) |
| 2131 if (temp4 > temp2) | |
| 203 | 2132 desat_time = (unsigned short)temp4; |
| 126 | 2133 else |
| 203 | 2134 desat_time = (unsigned short)temp2; |
| 252 | 2135 |
| 251 | 2136 if(desat_time > int_O_desaturation_time) |
| 2137 int_O_desaturation_time = desat_time; | |
| 116 | 2138 |
| 126 | 2139 // N2 saturation in multiples of halftime for display purposes |
| 339 | 2140 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 2141 temp2 = temp2 + 80.0; // set center | |
| 126 | 2142 if (temp2 < 0.0) |
| 2143 temp2 = 0.0; | |
| 2144 if (temp2 > 255.0) | |
| 2145 temp2 = 255.0; | |
| 339 | 2146 char_O_tissue_N2_saturation[ci] = (char)temp2; |
| 233 | 2147 |
| 126 | 2148 // He saturation in multiples of halftime for display purposes |
| 339 | 2149 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 2150 temp4 = temp4 + 80.0; // set center | |
| 126 | 2151 if (temp4 < 0.0) |
| 2152 temp4 = 0.0; | |
| 2153 if (temp4 > 255.0) | |
| 2154 temp4 = 255.0; | |
| 339 | 2155 char_O_tissue_He_saturation[ci] = (char)temp4; |
| 126 | 2156 } // for |
| 167 | 2157 } |
| 116 | 2158 |
| 167 | 2159 ////////////////////////////////////////////////////////////////////////////// |
| 2160 // calc_wo_deco_step_1_min | |
| 2161 // | |
| 116 | 2162 // FIXED N2 Ratio |
| 2163 // optimized in v.101 (...saturation_multiplier) | |
| 2164 // desaturation slowed down to 70,42% | |
| 167 | 2165 // |
| 2166 static void calc_wo_deco_step_1_min(void) | |
| 116 | 2167 { |
| 251 | 2168 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 2169 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
| 2170 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
| 2171 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 2172 | |
| 116 | 2173 if(flag_in_divemode) |
| 2174 { | |
| 2175 flag_in_divemode = 0; | |
| 2176 set_dbg_end_of_dive(); | |
| 2177 } | |
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2178 |
| 126 | 2179 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
| 368 | 2180 pres_respiration = pres_surface = int_I_pres_surface * 0.001; |
| 2181 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 200 | 2182 ppHe = 0.0; |
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2183 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 197 | 2184 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 126 | 2185 |
| 339 | 2186 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
| 167 | 2187 |
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2188 clear_deco_table(); |
| 200 | 2189 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
| 126 | 2190 char_O_nullzeit = 0; |
| 168 | 2191 int_O_ascenttime = 0; |
| 323 | 2192 int_O_extra_ascenttime = 0; |
| 126 | 2193 calc_gradient_factor(); |
| 167 | 2194 } |
| 126 | 2195 |
| 167 | 2196 ////////////////////////////////////////////////////////////////////////////// |
| 368 | 2197 // calc_dive_interval |
| 2198 // | |
| 2199 // Prepare tissue for delay before the next dive simulation. | |
| 2200 // | |
| 2201 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
| 2202 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
| 2203 // | |
| 2204 // Should be protected by deco_push_tissues_to_vault(), | |
| 2205 // deco_pull_tissues_from_vault() | |
| 2206 // | |
| 2207 // desaturation slowed down to 70,42%. | |
| 2208 // | |
|
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2209 static void calc_dive_interval(void) |
| 368 | 2210 { |
| 2211 overlay unsigned char t; | |
|
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2212 overlay unsigned char backup_model; |
| 368 | 2213 |
| 2214 //---- Initialize simulation parameters ---------------------------------- | |
| 2215 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
| 2216 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
| 2217 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 2218 ppHe = 0.0; | |
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2219 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 368 | 2220 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 2221 | |
|
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2222 // Make sure SURFACE_DESAT_FACTOR is applyed: |
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2223 backup_model = char_I_deco_model; |
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2224 char_I_deco_model = 0; |
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2225 |
| 368 | 2226 //---- Perform simulation ------------------------------------------------ |
| 2227 for(t=0; t<char_I_dive_interval; ++t) | |
| 2228 { | |
| 2229 calc_tissue(2); // period = 10min. | |
| 2230 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
| 2231 } | |
| 2232 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); | |
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2233 |
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2234 //---- Restore model ----------------------------------------------------- |
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2235 char_I_deco_model = backup_model; |
| 368 | 2236 } |
| 2237 | |
| 2238 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 2239 ////////////////////////////////////////////////////////////////////////////// |
| 2240 ////////////////////////////////// deco_hash ///////////////////////////////// | |
| 2241 ////////////////////////////////////////////////////////////////////////////// | |
| 2242 ////////////////////////////////////////////////////////////////////////////// | |
| 126 | 2243 |
| 184 | 2244 #ifndef CROSS_COMPILE |
| 116 | 2245 void deco_hash(void) |
| 2246 { | |
| 167 | 2247 overlay unsigned char md_i, md_j; // Loop index. |
| 2248 overlay unsigned char md_t; | |
| 2249 overlay unsigned char md_buffer[16]; | |
| 2250 overlay unsigned char md_temp; | |
| 203 | 2251 overlay unsigned short md_pointer; |
| 167 | 2252 |
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2253 RESET_C_STACK |
| 126 | 2254 |
| 2255 // init | |
| 164 | 2256 for(md_i=0;md_i<16;md_i++) |
| 126 | 2257 { |
| 2258 md_state[md_i] = 0; | |
| 164 | 2259 char_O_hash[md_i] = 0; |
| 126 | 2260 } // for md_i 16 |
| 116 | 2261 |
| 126 | 2262 _asm |
| 167 | 2263 movlw 0x01 // md_pi address. |
| 2264 movwf TBLPTRU,0 | |
| 2265 movlw 0x7E | |
| 2266 movwf TBLPTRH,0 | |
| 2267 movlw 0x00 | |
| 2268 movwf TBLPTRL,0 | |
| 126 | 2269 _endasm; |
| 165 | 2270 md_i = 0; |
| 2271 do { | |
| 126 | 2272 _asm |
| 2273 TBLRDPOSTINC | |
| 2274 movff TABLAT,md_temp | |
| 2275 _endasm | |
| 165 | 2276 md_pi_subst[md_i++] = md_temp; |
| 2277 } while( md_i != 0 ); | |
| 2278 | |
| 126 | 2279 _asm |
| 167 | 2280 movlw 0x00 |
| 2281 movwf TBLPTRU,0 | |
| 2282 movlw 0x00 | |
| 2283 movwf TBLPTRH,0 | |
| 2284 movlw 0x00 | |
| 2285 movwf TBLPTRL,0 | |
| 126 | 2286 _endasm |
| 167 | 2287 |
| 126 | 2288 // cycle buffers |
| 2289 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
| 2290 { | |
| 2291 md_t = 0; | |
| 2292 for (md_i=0;md_i<16;md_i++) | |
| 2293 { | |
| 2294 if(md_pointer == 9) | |
| 164 | 2295 md_temp = char_O_hash[md_i]; |
| 126 | 2296 else |
| 2297 { | |
| 2298 _asm | |
| 167 | 2299 TBLRDPOSTINC |
| 2300 movff TABLAT,md_temp | |
| 126 | 2301 _endasm |
| 2302 } // else | |
| 167 | 2303 |
| 2304 md_buffer[md_i] = md_temp; | |
| 186 | 2305 md_state[md_i+16] = md_temp; |
| 2306 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
| 126 | 2307 } // for md_i 16 |
| 2308 | |
| 2309 for (md_i=0;md_i<18;md_i++) | |
| 2310 { | |
| 2311 for (md_j=0;md_j<48;md_j++) | |
| 2312 { | |
| 167 | 2313 md_state[md_j] ^= md_pi_subst[md_t]; |
| 126 | 2314 md_t = md_state[md_j]; |
| 2315 } // for md_j 48 | |
| 2316 md_t = (unsigned char)(md_t+1); | |
| 2317 } // for md_i 18 | |
| 164 | 2318 md_t = char_O_hash[15]; |
| 126 | 2319 |
| 2320 for (md_i=0;md_i<16;md_i++) | |
| 2321 { | |
| 167 | 2322 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
| 164 | 2323 md_t = char_O_hash[md_i]; |
| 126 | 2324 } // for md_i 16 |
| 2325 } // for md_pointer | |
| 116 | 2326 } // void deco_hash(void) |
| 184 | 2327 #endif |
| 116 | 2328 |
| 167 | 2329 ////////////////////////////////////////////////////////////////////////////// |
| 2330 // deco_clear_CNS_fraction | |
| 2331 // | |
| 116 | 2332 // new in v.101 |
| 167 | 2333 // |
| 116 | 2334 void deco_clear_CNS_fraction(void) |
| 2335 { | |
|
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|
2336 RESET_C_STACK |
| 237 | 2337 |
| 126 | 2338 CNS_fraction = 0.0; |
| 2339 char_O_CNS_fraction = 0; | |
| 167 | 2340 } |
| 116 | 2341 |
| 167 | 2342 ////////////////////////////////////////////////////////////////////////////// |
| 2343 // deco_calc_CNS_fraction | |
| 2344 // | |
|
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2345 // Input: char_I_actual_ppO2 : Current condition (in decibars). |
|
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2346 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. |
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2347 // CNS_fraction : velue before period. |
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2348 // Output: CNS_fraction, char_O_CNS_fraction |
| 167 | 2349 // |
| 116 | 2350 void deco_calc_CNS_fraction(void) |
| 2351 { | |
| 292 | 2352 overlay float time_factor = 1.0f; |
| 126 | 2353 RESET_C_STACK |
| 167 | 2354 |
| 471 | 2355 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
| 237 | 2356 assert( char_I_actual_ppO2 > 15 ); |
| 2357 | |
|
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2358 if( char_I_step_is_1min == 1 ) |
| 292 | 2359 time_factor = 30.0f; |
|
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2360 else if( char_I_step_is_1min == 2 ) |
|
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2361 time_factor = 300.0f; |
| 116 | 2362 |
| 126 | 2363 if (char_I_actual_ppO2 < 50) |
| 292 | 2364 ; // no changes |
| 126 | 2365 else if (char_I_actual_ppO2 < 60) |
|
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2366 CNS_fraction += time_factor/(-540.0 * char_I_actual_ppO2 + 54000.0); |
| 126 | 2367 else if (char_I_actual_ppO2 < 70) |
|
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2368 CNS_fraction += time_factor/(-450.0 * char_I_actual_ppO2 + 48600.0); |
| 126 | 2369 else if (char_I_actual_ppO2 < 80) |
|
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2370 CNS_fraction += time_factor/(-360.0 * char_I_actual_ppO2 + 42300.0); |
| 126 | 2371 else if (char_I_actual_ppO2 < 90) |
|
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2372 CNS_fraction += time_factor/(-270.0 * char_I_actual_ppO2 + 35100.0); |
| 126 | 2373 else if (char_I_actual_ppO2 < 110) |
|
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2374 CNS_fraction += time_factor/(-180.0 * char_I_actual_ppO2 + 27000.0); |
| 126 | 2375 else if (char_I_actual_ppO2 < 150) |
|
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2376 CNS_fraction += time_factor/( -90.0 * char_I_actual_ppO2 + 17100.0); |
| 126 | 2377 else if (char_I_actual_ppO2 < 160) |
|
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2378 CNS_fraction += time_factor/(-225.0 * char_I_actual_ppO2 + 37350.0); |
| 126 | 2379 else if (char_I_actual_ppO2 < 165) |
| 292 | 2380 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 |
| 126 | 2381 else if (char_I_actual_ppO2 < 170) |
| 292 | 2382 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
| 126 | 2383 else if (char_I_actual_ppO2 < 175) |
| 292 | 2384 CNS_fraction += time_factor*0.00136; |
| 126 | 2385 else if (char_I_actual_ppO2 < 180) |
| 292 | 2386 CNS_fraction += time_factor*0.00180; |
| 126 | 2387 else if (char_I_actual_ppO2 < 185) |
| 292 | 2388 CNS_fraction += time_factor*0.00237; |
| 126 | 2389 else if (char_I_actual_ppO2 < 190) |
| 292 | 2390 CNS_fraction += time_factor*0.00310; |
| 126 | 2391 else if (char_I_actual_ppO2 < 195) |
| 292 | 2392 CNS_fraction += time_factor*0.00401; |
| 126 | 2393 else if (char_I_actual_ppO2 < 200) |
| 292 | 2394 CNS_fraction += time_factor*0.00517; |
| 126 | 2395 else if (char_I_actual_ppO2 < 230) |
| 292 | 2396 CNS_fraction += time_factor*0.0209; |
| 126 | 2397 else |
| 292 | 2398 CNS_fraction += time_factor*0.0482; // value for 2.5 |
| 116 | 2399 |
| 126 | 2400 if (CNS_fraction > 2.5) |
|
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|
2401 CNS_fraction = 2.55; |
| 126 | 2402 if (CNS_fraction < 0.0) |
| 2403 CNS_fraction = 0.0; | |
| 2404 | |
|
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|
2405 char_O_CNS_fraction = (unsigned char)(100.0 * CNS_fraction + 0.5); |
| 167 | 2406 } |
| 116 | 2407 |
| 167 | 2408 ////////////////////////////////////////////////////////////////////////////// |
|
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2409 // deco_calc_CNS_planning |
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2410 // |
|
511
2a6293641d51
NEW NDL NDL faster/more precise simu (but no closed formula for trimix).
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|
2411 // Compute CNS during predicted ascent. |
| 488 | 2412 // |
| 2413 // Note: Needs a call to deco_push_tissues_to_vault(), | |
| 2414 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
| 2415 // | |
| 2416 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
| 2417 // Output: CNS_fraction, char_O_CNS_fraction | |
| 2418 // | |
|
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2419 void deco_calc_CNS_planning(void) |
|
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2420 { |
|
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|
2421 overlay unsigned char backup_gas_last_depth; |
|
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|
2422 overlay unsigned char backup_gas_last_used; |
|
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|
2423 overlay unsigned short backup_gas_delay; |
|
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|
2424 overlay unsigned short backup_dive_mins; |
|
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|
2425 overlay unsigned char backup_actual_ppO2; |
|
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|
2426 |
|
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|
2427 RESET_C_STACK |
|
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|
2428 |
|
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|
2429 // Backup state machine |
|
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|
2430 backup_gas_last_depth = sim_gas_last_depth; |
|
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|
2431 backup_gas_last_used = sim_gas_last_used; |
|
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|
2432 backup_gas_delay = sim_gas_delay; |
|
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|
2433 backup_dive_mins = sim_dive_mins; |
|
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|
2434 backup_actual_ppO2 = char_I_actual_ppO2; |
|
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|
2435 |
|
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|
2436 // Uses 1min CNS period: |
|
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|
2437 char_I_step_is_1min = 1; |
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|
2438 |
|
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|
2439 //---- Retrieve bottom Gas used, and set variables. |
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2440 sim_gas_last_used = char_I_first_gas; |
|
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|
2441 sim_gas_last_depth = 0; // Surface gas marker. |
|
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|
2442 gas_switch_set(); // Sets initial calc_N2/He_ratio |
|
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|
2443 |
|
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|
2444 //---- CCR mode : do the full TTS at once -------------------------------- |
|
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|
2445 if( char_I_const_ppO2 != 0 ) |
|
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|
2446 { |
|
443
4c7f304de294
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changeset
|
2447 overlay unsigned short t; // Needs 16bits here ! |
|
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|
2448 char_I_actual_ppO2 = char_I_const_ppO2; |
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|
2449 for(t=0; t<int_O_ascenttime; ++t) |
|
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|
2450 deco_calc_CNS_fraction(); |
|
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|
2451 } |
|
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|
2452 else //---- OC mode : have to follow all gas switches... ----------------- |
|
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|
2453 { |
|
443
4c7f304de294
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changeset
|
2454 overlay unsigned char i = 0; // Decostop loop counter |
|
439
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|
2455 overlay float actual_ppO2; |
|
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|
2456 overlay unsigned char time, t; |
|
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|
2457 |
|
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|
2458 //---- Ascent to surface delay |
|
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|
2459 // NOTE: count as if time is spent with bottom pressure, |
|
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|
2460 // AND the bottom gas |
| 488 | 2461 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR - ppWater) |
|
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|
2462 * (1.0 - calc_N2_ratio - calc_He_ratio); |
|
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|
2463 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
|
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|
2464 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
|
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|
2465 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
|
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|
2466 |
|
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|
2467 // Ascent time (rounded up): |
|
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|
2468 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); |
|
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|
2469 |
|
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|
2470 for(t=0; t<time; ++t) |
|
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|
2471 { |
|
439
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|
2472 deco_calc_CNS_fraction(); |
|
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|
2473 sim_dive_mins++; |
|
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|
2474 } |
|
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|
2475 |
|
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|
2476 //---- Do all further stops |
|
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|
2477 for(i=0; i<NUM_STOPS; ++i) |
|
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|
2478 { |
|
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|
2479 //---- Get next stop |
|
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|
2480 time = char_O_deco_time[i]; |
|
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|
2481 temp_depth_limit = char_O_deco_depth[i] & 0x7F; |
|
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|
2482 if( time == 0 ) break; // End of table: done. |
|
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|
2483 |
|
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|
2484 //---- Gas Switch ? |
|
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diff
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|
2485 if( char_O_deco_depth[i] & 0x80 ) |
|
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|
2486 gas_switch_deepest(); |
|
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|
2487 |
|
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|
2488 //---- Convert Depth and N2_ratio to ppO2 |
| 488 | 2489 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR - ppWater) |
|
439
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|
2490 * (1.0 - calc_N2_ratio - calc_He_ratio); |
|
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|
2491 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
|
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|
2492 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
|
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|
2493 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
|
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|
2494 |
|
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|
2495 //---- Apply the stop |
|
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|
2496 for(t=0; t<time; ++t) |
|
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|
2497 { |
|
439
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|
2498 deco_calc_CNS_fraction(); |
|
490
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BUGFIX (minor) deco_calc_CNS_planning should save ppO2 and gas switch history.
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|
2499 sim_dive_mins++; |
|
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BUGFIX (minor) deco_calc_CNS_planning should save ppO2 and gas switch history.
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|
2500 } |
|
439
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|
2501 } |
| 488 | 2502 } |
| 2503 | |
| 2504 // Back to normal mode... | |
| 2505 char_I_step_is_1min = 0; | |
|
490
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BUGFIX (minor) deco_calc_CNS_planning should save ppO2 and gas switch history.
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|
2506 sim_gas_last_depth = backup_gas_last_depth; |
|
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BUGFIX (minor) deco_calc_CNS_planning should save ppO2 and gas switch history.
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|
2507 sim_gas_last_used = backup_gas_last_used; |
|
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BUGFIX (minor) deco_calc_CNS_planning should save ppO2 and gas switch history.
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|
2508 sim_gas_delay = backup_gas_delay; |
|
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BUGFIX (minor) deco_calc_CNS_planning should save ppO2 and gas switch history.
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|
2509 sim_dive_mins = backup_dive_mins; |
|
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BUGFIX (minor) deco_calc_CNS_planning should save ppO2 and gas switch history.
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|
2510 char_I_actual_ppO2 = backup_actual_ppO2; |
|
439
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|
2511 } |
|
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|
2512 |
|
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|
2513 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 2514 // deco_calc_CNS_decrease_15min |
| 2515 // | |
| 116 | 2516 // new in v.101 |
| 167 | 2517 // |
| 116 | 2518 // calculates the half time of 90 minutes in 6 steps of 15 min |
| 200 | 2519 // (Used in sleepmode, for low battery mode). |
| 167 | 2520 // |
| 116 | 2521 // Output: char_O_CNS_fraction |
| 2522 // Uses and Updates: CNS_fraction | |
| 167 | 2523 // |
| 116 | 2524 void deco_calc_CNS_decrease_15min(void) |
| 2525 { | |
| 237 | 2526 RESET_C_STACK |
| 2527 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.5 ); | |
| 2528 | |
| 126 | 2529 CNS_fraction = 0.890899 * CNS_fraction; |
| 167 | 2530 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); |
| 2531 } | |
| 116 | 2532 |
| 167 | 2533 ////////////////////////////////////////////////////////////////////////////// |
| 2534 // deco_calc_percentage | |
| 2535 // | |
| 116 | 2536 // new in v.101 |
| 167 | 2537 // |
| 116 | 2538 // calculates int_I_temp * char_I_temp / 100 |
| 2539 // output is int_I_temp | |
| 200 | 2540 // |
| 2541 // Used to compute NoFly remaining time. | |
|
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|
2542 // |
| 116 | 2543 void deco_calc_percentage(void) |
| 2544 { | |
|
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|
2545 RESET_C_STACK |
|
222
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|
2546 |
| 237 | 2547 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
| 2548 assert( 0 <= int_I_temp && int_I_temp < 2880 ); // Less than 48h... | |
| 2549 | |
|
222
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|
2550 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
| 237 | 2551 |
| 302 | 2552 assert( int_I_temp < 2880 ); // Less than 48h... |
|
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|
2553 } |
|
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|
2554 |
|
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2555 |
|
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|
2556 ////////////////////////////////////////////////////////////////////////////// |
|
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2557 // deco_gas_volumes |
|
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|
2558 // |
|
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|
2559 // new in v.111 |
|
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2560 // |
|
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|
2561 // calculates volumes for each gas. |
|
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|
2562 // |
|
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|
2563 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
|
240
d995e220ddac
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|
2564 // Gas list. |
|
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|
2565 // char_I_first_gas is the bottom gas. |
|
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2566 // decoplan (char_O_deco_depth, char_O_deco_time). |
|
234
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|
2567 // CF#54 == TRUE if shallowest stop first. |
|
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|
2568 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min. |
|
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|
2569 // CF#57 == deco liters/minutes (5 .. 50) or bar/min. |
| 224 | 2570 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
|
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2571 // |
|
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|
2572 void deco_gas_volumes(void) |
|
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2573 { |
| 338 | 2574 overlay float volumes[NUM_GAS]; |
|
478
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|
2575 overlay float bottom_usage, deco_usage; |
|
234
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|
2576 overlay unsigned char i, deepest_first; |
| 241 | 2577 overlay unsigned char gas; |
|
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2578 RESET_C_STACK |
|
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2579 |
|
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|
2580 //---- initialize with bottom consumption -------------------------------- |
| 338 | 2581 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
|
240
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|
2582 volumes[i] = 0.0; |
|
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|
2583 |
| 338 | 2584 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
| 241 | 2585 gas = char_I_first_gas - 1; |
| 2586 | |
|
478
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|
2587 bottom_usage = (float) read_custom_function(56); |
| 265 | 2588 if( bottom_usage > 0.0 ) |
| 2589 volumes[gas] | |
| 2590 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
| 2591 * char_I_bottom_time // in minutes. | |
| 2592 * bottom_usage; // In liter/minutes. | |
| 2593 else | |
| 2594 volumes[gas] = 65535.0; | |
|
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2595 |
|
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2596 //---- Ascent usage ------------------------------------------------------ |
|
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|
2597 |
|
234
bb8940caebe1
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|
2598 deepest_first = read_custom_function(54) == 0; |
|
511
2a6293641d51
NEW NDL NDL faster/more precise simu (but no closed formula for trimix).
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diff
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|
2599 deco_usage = (float) read_custom_function(57); // In liter/minutes. |
|
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2600 |
| 224 | 2601 // Usage up to the first stop: |
| 2602 // - computed at MAX depth (easier, safer), | |
|
222
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|
2603 // - with an ascent speed of 10m/min. |
| 224 | 2604 // - with ascent litter / minutes. |
|
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|
2605 // - still using bottom gas: |
|
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|
2606 if( deco_usage > 0.0 ) |
| 265 | 2607 volumes[gas] |
| 2608 += (char_I_bottom_depth*0.1 + 1.0) // Depth -> bar | |
| 2609 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 // ascent time (min) | |
|
478
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|
2610 * deco_usage; // Consumption ( xxx / min @ 1 bar) |
| 265 | 2611 else |
| 2612 volumes[gas] = 65535.0; | |
|
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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|
2613 |
| 338 | 2614 for(i=0; i<NUM_STOPS; ++i) |
|
222
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|
2615 { |
| 241 | 2616 overlay unsigned char j; |
|
234
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diff
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|
2617 overlay unsigned char depth, time, ascent; |
|
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|
2618 |
|
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|
2619 // Manage stops in reverse order (CF#54) |
|
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|
2620 if( deepest_first ) |
|
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|
2621 { |
| 241 | 2622 time = char_O_deco_time[i]; |
|
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|
2623 if( time == 0 ) break; // End of table: done. |
|
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|
2624 |
|
288
9feb224f6871
Manage gas-switch marked stops in volume consumption.
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diff
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|
2625 ascent = depth = char_O_deco_depth[i] & 0x7F; |
|
234
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diff
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|
2626 if( i < 31 ) |
|
288
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diff
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|
2627 ascent -= char_O_deco_depth[i+1] & 0x7F; |
|
234
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|
2628 } |
|
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|
2629 else |
|
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|
2630 { |
|
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|
2631 time = char_O_deco_time[31-i]; |
|
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|
2632 if( time == 0 ) continue; // not yet: still searh table. |
|
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|
2633 |
|
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|
2634 ascent = depth = char_O_deco_depth[31-i] & 0x7F; |
|
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|
2635 if( i < 31 ) |
|
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|
2636 ascent -= char_O_deco_depth[30-i] & 0x7F; |
|
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|
2637 } |
|
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|
2638 |
|
222
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|
2639 // Gas switch depth ? |
| 338 | 2640 for(j=0; j<NUM_GAS; ++j) |
|
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|
2641 { |
|
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|
2642 if( depth <= char_I_deco_gas_change[j] ) |
| 241 | 2643 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
| 224 | 2644 gas = j; |
|
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|
2645 } |
|
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|
2646 |
|
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|
2647 // usage during stop: |
| 224 | 2648 // Note: because first gas is not in there, increment gas+1 |
|
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|
2649 if( deco_usage > 0.0 ) |
| 265 | 2650 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
| 2651 * time // in minutes. | |
|
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|
2652 * deco_usage // in xxx / min @ 1bar. |
| 265 | 2653 // Plus usage during ascent to the next stop, at 10m/min. |
| 2654 + (depth*0.1 + 1.0) | |
|
275
4310ab395dbe
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|
2655 * ascent*0.1 // metre --> min |
|
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|
2656 * deco_usage; |
| 265 | 2657 else |
| 2658 volumes[gas] = 65535.0; | |
|
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|
2659 } |
|
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|
2660 |
|
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|
2661 //---- convert results for the ASM interface ----------------------------- |
| 338 | 2662 for(i=0; i<NUM_GAS; ++i) |
|
441
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|
2663 if( volumes[i] > 65534.0 ) |
| 224 | 2664 int_O_gas_volumes[i] = 65535; |
|
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2665 else |
|
441
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|
2666 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); |
| 116 | 2667 } |
| 2668 | |
| 167 | 2669 ////////////////////////////////////////////////////////////////////////////// |
| 2670 | |
| 116 | 2671 void deco_push_tissues_to_vault(void) |
| 2672 { | |
| 167 | 2673 overlay unsigned char x; |
|
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|
2674 RESET_C_STACK |
| 167 | 2675 |
| 116 | 2676 cns_vault = CNS_fraction; |
| 339 | 2677 for (x=0;x<NUM_COMP;x++) |
| 2678 { | |
| 2679 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
| 2680 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
| 2681 } | |
| 116 | 2682 } |
| 167 | 2683 |
| 116 | 2684 void deco_pull_tissues_from_vault(void) |
| 2685 { | |
| 167 | 2686 overlay unsigned char x; |
|
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|
2687 RESET_C_STACK |
| 167 | 2688 |
| 339 | 2689 for (x=0; x<NUM_COMP; x++) |
| 2690 { | |
| 2691 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
| 2692 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
| 2693 } | |
| 292 | 2694 |
| 2695 // Restore both CNS variable, too. | |
| 2696 CNS_fraction = cns_vault; | |
| 2697 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); | |
| 116 | 2698 } |
| 2699 | |
| 167 | 2700 ////////////////////////////////////////////////////////////////////////////// |
| 2701 // | |
| 184 | 2702 #ifndef CROSS_COMPILE |
| 2703 void main() {} | |
| 2704 #endif |