Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 541:6626a6c4eda3
BUGFIX decoplan: ppO2 for CNS is inspired, alveolar (ie. no ppWater correction).
| author | JeanDo |
|---|---|
| date | Mon, 09 Jan 2012 23:53:59 +0100 |
| parents | 9e838e0b3749 |
| children | 896b6346ccd2 |
| 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 | |
| 532 | 11 // Copyright (C) 2011 HeinrichsWeikamp GbR |
| 116 | 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. |
| 532 | 83 // 2011/12/17: [mH] Remove of the useless debug stuff |
| 116 | 84 // |
| 167 | 85 // TODO: |
| 86 // + Allow to abort MD2 calculation (have to restart next time). | |
| 87 // | |
| 88 // Literature: | |
| 200 | 89 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
| 116 | 90 // 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 |
| 91 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
| 92 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
| 93 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
| 94 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
| 167 | 95 // |
| 96 // | |
| 116 | 97 |
| 98 // ********************* | |
| 99 // ** I N C L U D E S ** | |
| 100 // ********************* | |
| 101 #include <math.h> | |
| 167 | 102 |
| 192 | 103 // *********************************************** |
| 104 // ** V A R I A B L E S D E F I N I T I O N S ** | |
| 105 // *********************************************** | |
| 106 | |
| 107 #include "p2_definitions.h" | |
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108 #define TEST_MAIN |
| 509 | 109 #include "../OSTC_code_asm_part1/shared_definitions.h" |
| 192 | 110 |
| 200 | 111 // Water vapour partial pressure in the lumb. |
| 527 | 112 #define ppWater 0.0627 |
| 317 | 113 #define METER_TO_BAR 0.09985 |
| 114 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
| 200 | 115 |
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116 // Surface security factor |
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117 #define SURFACE_DESAT_FACTOR 0.7042 |
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118 |
| 167 | 119 // ************************* |
| 120 // ** P R O T O T Y P E S ** | |
| 121 // ************************* | |
| 122 | |
| 123 static void calc_hauptroutine(void); | |
| 124 static void calc_nullzeit(void); | |
| 125 | |
| 192 | 126 static void calc_tissue(PARAMETER unsigned char period); |
| 258 | 127 static void calc_limit(void); |
| 192 | 128 |
| 167 | 129 static void clear_tissue(void); |
| 130 static void calc_ascenttime(void); | |
| 131 static void update_startvalues(void); | |
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132 static void clear_deco_table(void); |
| 471 | 133 static unsigned char update_deco_table(void); |
| 192 | 134 |
| 135 static void sim_tissue(PARAMETER unsigned char period); | |
| 136 static void sim_limit(PARAMETER float GF_current); | |
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137 static void sim_extra_time(void); |
| 368 | 138 static void calc_dive_interval(void); |
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139 |
| 167 | 140 static void calc_gradient_factor(void); |
| 141 static void calc_wo_deco_step_1_min(void); | |
| 142 | |
| 143 static void calc_hauptroutine_data_input(void); | |
| 144 static void calc_hauptroutine_update_tissues(void); | |
| 145 static void calc_hauptroutine_calc_deco(void); | |
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146 static void sim_ascent_to_first_stop(void); |
| 167 | 147 |
| 241 | 148 static unsigned char gas_switch_deepest(void); |
| 149 static void gas_switch_set(void); | |
| 217 | 150 |
| 241 | 151 static unsigned char calc_nextdecodepth(void); |
| 116 | 152 |
| 200 | 153 //---- Bank 4 parameters ----------------------------------------------------- |
| 163 | 154 #pragma udata bank4=0x400 |
| 116 | 155 |
| 156 static float temp_limit; | |
| 157 static float GF_low; | |
| 158 static float GF_high; | |
| 159 static float GF_delta; | |
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160 static float low_depth; // Depth of deepest stop |
| 192 | 161 static float locked_GF_step; // GF_delta / low_depth |
| 162 | |
| 163 static unsigned char temp_depth_limit; | |
| 171 | 164 |
| 192 | 165 // Simulation context: used to predict ascent. |
| 166 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 167 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 116 | 168 |
| 192 | 169 // Real context: what we are doing now. |
| 170 static float calc_lead_tissue_limit; // | |
| 116 | 171 |
| 338 | 172 static unsigned char internal_deco_time[NUM_STOPS]; |
| 173 static unsigned char internal_deco_depth[NUM_STOPS]; | |
| 116 | 174 |
| 175 static float cns_vault; | |
| 339 | 176 static float pres_tissue_N2_vault[NUM_COMP]; |
| 177 static float pres_tissue_He_vault[NUM_COMP]; | |
| 116 | 178 |
| 163 | 179 //---- Bank 5 parameters ----------------------------------------------------- |
| 180 #pragma udata bank5=0x500 | |
| 181 | |
| 167 | 182 static unsigned char ci; |
| 116 | 183 static float pres_respiration; |
| 184 static float pres_surface; | |
| 185 static float temp_deco; | |
| 236 | 186 static float ppN2; |
| 200 | 187 static float ppHe; |
| 116 | 188 static float temp_tissue; |
| 200 | 189 static float N2_ratio; // Breathed gas nitrogen ratio. |
| 190 static float He_ratio; // Breathed gas helium ratio. | |
| 191 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
| 192 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
| 193 static float var_He_a; // Bühlmann a, for current He tissue. | |
| 194 static float var_He_b; // Bühlmann b, for current He tissue. | |
| 195 static float var_N2_e; // Exposition, for current N2 tissue. | |
| 196 static float var_He_e; // Exposition, for current He tissue. | |
| 509 | 197 static float var_N2_ht; // Half-time for current N2 tissue. |
| 198 static float var_He_ht; // Half-time for current N2 tissue. | |
| 116 | 199 |
| 338 | 200 static float pres_diluent; // new in v.101 |
| 201 static float const_ppO2; // new in v.101 | |
| 116 | 202 |
| 241 | 203 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
| 204 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
| 203 | 205 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
| 206 static unsigned short sim_dive_mins; // Simulated dive time. | |
| 200 | 207 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
| 208 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
| 209 static float CNS_fraction; // new in v.101 | |
| 210 static float float_saturation_multiplier; // new in v.101 | |
| 211 static float float_desaturation_multiplier; // new in v.101 | |
| 338 | 212 static float float_deco_distance; // new in v.101 |
| 213 static char flag_in_divemode; // new in v.108 | |
| 167 | 214 |
| 338 | 215 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
| 167 | 216 |
| 163 | 217 //---- Bank 6 parameters ----------------------------------------------------- |
| 218 #pragma udata bank6=0x600 | |
| 116 | 219 |
| 339 | 220 float pres_tissue_N2[NUM_COMP]; |
| 221 float pres_tissue_He[NUM_COMP]; | |
| 509 | 222 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. |
| 223 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
| 116 | 224 |
| 163 | 225 //---- Bank 7 parameters ----------------------------------------------------- |
| 226 #pragma udata bank7=0x700 | |
| 509 | 227 // EMPTY ... |
| 116 | 228 |
| 163 | 229 //---- Bank 8 parameters ----------------------------------------------------- |
| 116 | 230 #pragma udata bank8=0x800 |
| 163 | 231 |
| 116 | 232 static char md_pi_subst[256]; |
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233 #define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
| 116 | 234 |
| 163 | 235 //---- Bank 9 parameters ----------------------------------------------------- |
| 167 | 236 #pragma udata bank9=0x900 |
| 116 | 237 |
| 163 | 238 static char md_state[48]; // DONT MOVE !! // has to be at the beginning of bank 9 for the asm code!!! |
| 116 | 239 |
| 167 | 240 ////////////////////////////////////////////////////////////////////////////// |
| 241 ////////////////////////////////////////////////////////////////////////////// | |
| 242 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 243 ////////////////////////////////////////////////////////////////////////////// | |
| 244 ////////////////////////////////////////////////////////////////////////////// | |
| 245 // | |
| 246 // End of PROM code is 17F00, So push tables on PROM top... | |
| 247 // | |
| 248 #pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. | |
| 249 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) | |
| 116 | 250 |
| 167 | 251 // Magic table to compute the MD2 HASH |
| 252 // | |
| 253 #pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... | |
| 203 | 254 rom const rom unsigned short md_pi[] = |
| 116 | 255 { |
| 256 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 | |
| 257 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA | |
| 258 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 | |
| 259 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A | |
| 260 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 | |
| 261 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 | |
| 262 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 | |
| 263 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 | |
| 264 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 | |
| 265 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F | |
| 266 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 | |
| 267 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 | |
| 268 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A | |
| 269 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 | |
| 270 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A | |
| 271 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 | |
| 272 }; | |
| 273 | |
| 167 | 274 ////////////////////////////////////////////////////////////////////////////// |
| 275 ////////////////////////////////////////////////////////////////////////////// | |
| 276 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 277 ////////////////////////////////////////////////////////////////////////////// | |
| 278 ////////////////////////////////////////////////////////////////////////////// | |
| 279 // | |
| 116 | 280 // all new in v.102 |
| 281 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 282 | |
| 283 #pragma code p2_deco = 0x0C000 | |
| 284 | |
| 167 | 285 ////////////////////////////////////////////////////////////////////////////// |
| 286 ////////////////////////////////////////////////////////////////////////////// | |
| 287 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 288 ////////////////////////////////////////////////////////////////////////////// | |
| 289 ////////////////////////////////////////////////////////////////////////////// | |
| 290 | |
| 235 | 291 ////////////////////////////////////////////////////////////////////////////// |
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292 // Bump to blue-screen when an assert is wrong |
| 235 | 293 #ifdef __DEBUG |
| 294 void assert_failed(PARAMETER short int line) | |
| 295 { | |
| 296 extern void PLED_resetdebugger(void); | |
| 297 extern unsigned short temp10; | |
| 298 | |
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299 temp10 = line; // Show source line number as stack depth. |
| 235 | 300 PLED_resetdebugger(); |
| 301 } | |
| 302 #endif | |
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303 |
| 235 | 304 ////////////////////////////////////////////////////////////////////////////// |
| 305 // When calling C code from ASM context, the data stack pointer and | |
| 306 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
| 307 | |
| 308 #ifdef CROSS_COMPILE | |
| 309 # define RESET_C_STACK | |
| 310 #else | |
| 311 # ifdef __DEBUG | |
| 312 # define RESET_C_STACK fillDataStack(); | |
| 313 void fillDataStack(void) | |
| 314 { | |
| 315 _asm | |
| 316 LFSR 1,C_STACK | |
| 317 MOVLW 0xCC | |
| 318 loop: MOVWF POSTINC1,0 | |
| 319 TSTFSZ FSR1L,0 | |
| 320 BRA loop | |
| 321 | |
| 322 LFSR 1,C_STACK | |
| 323 LFSR 2,C_STACK | |
| 324 _endasm | |
| 325 } | |
| 326 # else | |
| 327 # define RESET_C_STACK \ | |
| 328 _asm \ | |
| 329 LFSR 1, C_STACK \ | |
| 330 LFSR 2, C_STACK \ | |
| 331 _endasm | |
| 332 # endif | |
| 333 #endif | |
| 334 | |
| 335 ////////////////////////////////////////////////////////////////////////////// | |
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336 // Read CF values from the C code. |
| 235 | 337 |
| 488 | 338 #ifdef CROSS_COMPILE |
| 339 // Full description of the OSTC EEPROM map, including CF values. | |
| 340 # include "OSTC_eeprom.h" | |
| 341 #endif | |
| 342 | |
| 203 | 343 static short read_custom_function(PARAMETER unsigned char cf) |
| 167 | 344 { |
| 184 | 345 #ifdef CROSS_COMPILE |
| 488 | 346 return (cf & 32) ? eeprom.bank1_CF[cf-32].value |
| 347 : eeprom.bank0_CF[cf ].value; | |
| 184 | 348 #else |
| 167 | 349 extern unsigned char hi, lo; |
| 350 extern void getcustom15(); | |
| 351 _asm | |
| 352 movff cf,WREG | |
| 353 call getcustom15,0 | |
| 354 movff lo,PRODL | |
| 355 movff hi,PRODH | |
| 356 _endasm | |
| 184 | 357 #endif |
| 167 | 358 } |
| 359 | |
| 360 ////////////////////////////////////////////////////////////////////////////// | |
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361 // Fast subroutine to read RTC timer 3. |
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362 // Note: result is in 1/32 of msecs. |
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363 static unsigned short tmr3(void) |
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364 { |
| 261 | 365 #ifndef CROSS_COMPILE |
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366 _asm |
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367 movff 0xfb2,PRODL // TMR3L |
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368 movff 0xfb3,PRODH // TMR3H |
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369 _endasm // result in PRODH:PRODL. |
| 261 | 370 #else |
| 371 return 0; | |
| 372 #endif | |
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373 } |
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374 |
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375 ////////////////////////////////////////////////////////////////////////////// |
| 258 | 376 // read buhlmann tables A and B for compatriment ci |
| 377 // | |
| 378 static void read_buhlmann_coefficients(void) | |
| 165 | 379 { |
| 184 | 380 #ifndef CROSS_COMPILE |
| 167 | 381 // Note: we don't use far rom pointer, because the |
| 338 | 382 // 24 bits is too complex, hence we have to set |
| 167 | 383 // the UPPER page ourself... |
| 384 // --> Set zero if tables are moved to lower pages ! | |
| 385 _asm | |
| 386 movlw 1 | |
| 387 movwf TBLPTRU,0 | |
| 388 _endasm | |
| 184 | 389 #endif |
| 258 | 390 |
| 338 | 391 assert( 0 <= ci && ci < NUM_COMP ); |
| 392 | |
| 393 // Use an interleaved array (AoS) to access coefficients with a | |
| 394 // single addressing. | |
| 395 { | |
| 396 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
| 397 var_N2_a = *ptr++; | |
| 398 var_N2_b = *ptr++; | |
| 399 var_He_a = *ptr++; | |
| 400 var_He_b = *ptr++; | |
| 401 } | |
| 258 | 402 } |
| 403 | |
| 404 ////////////////////////////////////////////////////////////////////////////// | |
| 405 // read buhlmann tables for compatriment ci | |
| 406 // If period == 0 : 2sec interval | |
| 407 // 1 : 1 min interval | |
| 408 // 2 : 10 min interval. | |
| 409 static void read_buhlmann_times(PARAMETER char period) | |
| 410 { | |
| 411 #ifndef CROSS_COMPILE | |
| 412 // Note: we don't use far rom pointer, because the | |
| 413 // 24 bits is to complex, hence we have to set | |
| 414 // the UPPER page ourself... | |
| 415 // --> Set zero if tables are moved to lower pages ! | |
| 416 _asm | |
| 417 movlw 1 | |
| 418 movwf TBLPTRU,0 | |
| 419 _endasm | |
| 420 #endif | |
| 338 | 421 |
| 422 assert( 0 <= ci && ci < NUM_COMP ); | |
| 258 | 423 |
| 165 | 424 // Integration intervals. |
| 167 | 425 switch(period) |
| 165 | 426 { |
| 427 case 0: //---- 2 sec ----------------------------------------------------- | |
| 338 | 428 { |
| 429 overlay rom const float* ptr = &e2secs[2*ci]; | |
| 430 var_N2_e = *ptr++; | |
| 431 var_He_e = *ptr++; | |
| 432 } | |
| 165 | 433 break; |
| 434 | |
| 435 case 1: //---- 1 min ----------------------------------------------------- | |
| 338 | 436 { |
| 437 overlay rom const float* ptr = &e1min[2*ci]; | |
| 438 var_N2_e = *ptr++; | |
| 439 var_He_e = *ptr++; | |
| 440 } | |
| 165 | 441 break; |
| 442 | |
| 443 case 2: //---- 10 min ---------------------------------------------------- | |
| 338 | 444 { |
| 445 overlay rom const float* ptr = &e10min[2*ci]; | |
| 446 var_N2_e = *ptr++; | |
| 447 var_He_e = *ptr++; | |
| 448 } | |
| 165 | 449 break; |
| 197 | 450 |
| 451 default: | |
| 527 | 452 assert(0); // Never go there... |
| 165 | 453 } |
| 454 } | |
| 455 | |
| 456 ////////////////////////////////////////////////////////////////////////////// | |
| 509 | 457 // read buhlmann tables for compatriment ci |
| 458 // | |
| 459 static void read_buhlmann_ht(void) | |
| 460 { | |
| 461 | |
| 462 #ifndef CROSS_COMPILE | |
| 463 // Note: we don't use far rom pointer, because the | |
| 464 // 24 bits is to complex, hence we have to set | |
| 465 // the UPPER page ourself... | |
| 466 // --> Set zero if tables are moved to lower pages ! | |
| 467 _asm | |
| 468 movlw 1 | |
| 469 movwf TBLPTRU,0 | |
| 470 _endasm | |
| 471 #endif | |
| 472 | |
| 473 assert( 0 <= ci && ci < NUM_COMP ); | |
| 474 { | |
| 475 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
| 476 var_N2_ht = *ptr++; | |
| 477 var_He_ht = *ptr++; | |
| 478 } | |
| 479 | |
| 480 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
| 481 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
| 482 } | |
| 483 | |
| 484 ////////////////////////////////////////////////////////////////////////////// | |
|
340
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485 // calc_nextdecodepth |
| 165 | 486 // |
| 116 | 487 // new in v.102 |
| 165 | 488 // |
| 116 | 489 // INPUT, changing during dive: |
| 509 | 490 // temp_deco |
| 192 | 491 // low_depth |
| 167 | 492 // |
| 116 | 493 // INPUT, fixed during dive: |
| 167 | 494 // pres_surface |
| 495 // GF_delta | |
| 496 // GF_high | |
| 497 // GF_low | |
| 171 | 498 // char_I_depth_last_deco |
| 167 | 499 // float_deco_distance |
| 500 // | |
| 241 | 501 // RETURN TRUE iff a stop is needed. |
| 502 // | |
| 116 | 503 // OUTPUT |
| 171 | 504 // locked_GF_step |
| 167 | 505 // temp_depth_limt |
| 192 | 506 // low_depth |
| 167 | 507 // |
| 241 | 508 static unsigned char calc_nextdecodepth(void) |
| 167 | 509 { |
| 241 | 510 //--- Max ascent speed --------------------------------------------------- |
| 511 // Recompute leading gas limit, at current depth: | |
| 317 | 512 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
| 241 | 513 |
| 514 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 302 | 515 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
| 241 | 516 |
| 517 // Do we need to stop at current depth ? | |
| 518 overlay unsigned char need_stop = 0; | |
| 519 | |
| 520 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 521 | |
| 212 | 522 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
| 509 | 523 if( char_I_deco_model != 0 ) |
| 116 | 524 { |
| 241 | 525 if( depth >= low_depth ) |
| 192 | 526 sim_limit( GF_low ); |
| 527 else | |
| 528 sim_limit( GF_high - depth * locked_GF_step ); | |
| 529 | |
| 530 // Stops are needed ? | |
| 531 if( sim_lead_tissue_limit > pres_surface ) | |
| 532 { | |
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533 // Compute tolerated depth, for the leading tissue [metre]: |
| 317 | 534 overlay float depth_tol = (sim_lead_tissue_limit - pres_surface) * BAR_TO_METER; |
|
512
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535 overlay unsigned char first_stop; |
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536 |
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537 // If ascent is VERY fast, this can be lower than the actual depth... Because |
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538 // this happends only in simulation, just forget about it: |
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539 if( depth_tol > depth ) |
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540 depth_tol = depth; |
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541 |
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542 // Deepest stop, in multiples of 3 metres. |
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543 first_stop = 3 * (short)(0.99999 + depth_tol * 0.33333 ); |
| 192 | 544 assert( first_stop < 128 ); |
| 171 | 545 |
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546 // Is it a new deepest needed stop ? If yes this is the reference for |
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547 // the varying gradient factor. So reset that: |
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548 if( depth_tol > min_depth && depth_tol > low_depth ) |
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549 { |
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550 // Store the deepest stop depth, as reference for GF_low. |
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551 low_depth = depth_tol; |
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552 locked_GF_step = GF_delta / low_depth; |
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553 } |
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554 |
| 264 | 555 #if defined(__DEBUG) || defined(CROSS_COMPILE) |
| 261 | 556 { |
| 557 // Extra testing code to make sure the first_stop formula | |
| 558 // and rounding provides correct depth: | |
| 317 | 559 overlay float pres_stop = first_stop * METER_TO_BAR |
| 261 | 560 + pres_surface; |
| 561 | |
| 562 // Keep GF_low until a first stop depth is found: | |
| 563 if( first_stop >= low_depth ) | |
| 564 sim_limit( GF_low ); | |
| 565 else | |
| 566 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 567 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 568 sim_limit( GF_high - first_stop * locked_GF_step ); | |
| 569 | |
| 302 | 570 // upper limit (lowest pressure tolerated), + 1mbar for rounding...: |
| 571 assert( sim_lead_tissue_limit < (pres_stop + 0.001) ); | |
| 261 | 572 } |
| 573 #endif | |
| 574 | |
| 212 | 575 // Apply correction for the shallowest stop. |
| 192 | 576 if( first_stop == 3 ) // new in v104 |
| 577 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 171 | 578 |
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579 // Because gradient factor at first_stop might be bigger than at |
| 261 | 580 // current depth, we might ascent a bit more. |
| 581 // Hence, check all stops until one is indeed higher than tolerated presure: | |
| 582 while(first_stop > 0) | |
| 192 | 583 { |
| 584 overlay unsigned char next_stop; // Next index (0..30) | |
| 585 overlay float pres_stop; // Next depth (0m..90m) | |
| 171 | 586 |
| 241 | 587 // Check max speed, or reaching surface. |
| 588 if( first_stop <= min_depth ) | |
| 589 break; | |
| 590 | |
| 591 // So, there is indeed a stop needed: | |
| 592 need_stop = 1; | |
| 593 | |
| 192 | 594 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
| 595 next_stop = 0; | |
| 216 | 596 else if( first_stop == 6 ) |
| 597 next_stop = char_I_depth_last_deco; | |
| 192 | 598 else |
| 599 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 167 | 600 |
| 317 | 601 pres_stop = next_stop * METER_TO_BAR |
| 192 | 602 + pres_surface; |
| 603 | |
| 212 | 604 // Keep GF_low until a first stop depth is found: |
| 605 if( next_stop >= low_depth ) | |
| 606 sim_limit( GF_low ); | |
| 607 else | |
| 608 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 609 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 610 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 171 | 611 |
| 192 | 612 // upper limit (lowest pressure tolerated): |
| 613 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 614 break; | |
| 615 | |
| 616 // Else, validate that stop and loop... | |
| 617 first_stop = next_stop; | |
| 212 | 618 } |
| 619 | |
| 620 // next stop is the last validated depth found, aka first_stop | |
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621 temp_depth_limit = first_stop; // Stop depth, in metre. |
| 192 | 622 } |
| 171 | 623 else |
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624 temp_depth_limit = 0; // stop depth, in metre. |
| 116 | 625 } |
| 167 | 626 else //---- ZH-L16 model ------------------------------------------------- |
| 116 | 627 { |
| 192 | 628 overlay float pres_gradient; |
| 629 | |
| 630 // Original model | |
| 116 | 631 // optimized in v.101 |
| 171 | 632 // char_I_depth_last_deco included in v.101 |
| 116 | 633 |
| 192 | 634 // Compute sim_lead_tissue_limit too, but just once. |
| 635 sim_limit(1.0); | |
| 636 | |
| 637 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 167 | 638 if (pres_gradient >= 0) |
| 116 | 639 { |
| 317 | 640 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
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641 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
| 241 | 642 need_stop = 1; // Hit. |
| 643 | |
| 644 // Implement last stop at 4m/5m/6m... | |
| 645 if( temp_depth_limit == 3 ) | |
| 646 temp_depth_limit = char_I_depth_last_deco; | |
| 171 | 647 } |
| 116 | 648 else |
| 241 | 649 temp_depth_limit = 0; |
| 171 | 650 } |
| 212 | 651 |
| 217 | 652 //---- Check gas change -------------------------------------------------- |
| 241 | 653 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
| 654 | |
| 655 return need_stop; | |
| 167 | 656 } |
| 116 | 657 |
| 167 | 658 ////////////////////////////////////////////////////////////////////////////// |
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659 // copy_deco_table |
| 167 | 660 // |
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661 // Buffer the stops, once computed, so we can continue to display them |
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662 // while computing the next set. |
| 167 | 663 // |
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664 static void copy_deco_table(void) |
| 116 | 665 { |
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666 // Copy depth of the first (deepest) stop, because when reversing |
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667 // order, it will be hard to find... |
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668 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
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669 char_O_first_deco_time = internal_deco_time [0]; |
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670 |
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671 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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672 { |
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673 overlay unsigned char x, y; |
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674 |
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675 //---- First: search the first non-null depth |
| 339 | 676 for(x=(NUM_STOPS-1); x != 0; --x) |
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677 if( internal_deco_depth[x] != 0 ) break; |
| 116 | 678 |
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679 //---- Second: copy to output table (in reverse order) |
| 338 | 680 for(y=0; y<NUM_STOPS; y++, --x) |
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681 { |
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682 char_O_deco_depth[y] = internal_deco_depth[x]; |
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683 char_O_deco_time [y] = internal_deco_time [x]; |
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684 |
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685 // Stop only once the last transfer is done. |
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686 if( x == 0 ) break; |
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687 } |
| 116 | 688 |
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689 //---- Third: fill table end with null |
| 339 | 690 for(y++; y<NUM_STOPS; y++) |
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691 { |
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692 char_O_deco_time [y] = 0; |
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693 char_O_deco_depth[y] = 0; |
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694 } |
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695 } |
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696 else //---- Straight copy ------------------------------------------------ |
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697 { |
| 167 | 698 overlay unsigned char x; |
| 699 | |
| 339 | 700 for(x=0; x<NUM_STOPS; x++) |
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701 { |
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702 char_O_deco_depth[x] = internal_deco_depth[x]; |
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703 char_O_deco_time [x] = internal_deco_time [x]; |
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704 } |
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705 } |
| 167 | 706 } |
| 116 | 707 |
| 167 | 708 ////////////////////////////////////////////////////////////////////////////// |
| 116 | 709 // temp_tissue_safety // |
| 167 | 710 // |
| 116 | 711 // outsourced in v.102 |
| 167 | 712 // |
| 713 // Apply safety factors for brand ZH-L16 model. | |
| 714 // | |
| 715 static void temp_tissue_safety(void) | |
| 116 | 716 { |
| 197 | 717 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
| 718 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 719 | |
| 167 | 720 if( char_I_deco_model == 0 ) |
| 116 | 721 { |
|
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722 if( temp_tissue < 0.0 ) |
| 126 | 723 temp_tissue *= float_desaturation_multiplier; |
| 116 | 724 else |
| 126 | 725 temp_tissue *= float_saturation_multiplier; |
| 116 | 726 } |
| 167 | 727 } |
| 116 | 728 |
| 167 | 729 ////////////////////////////////////////////////////////////////////////////// |
| 730 ////////////////////////////////////////////////////////////////////////////// | |
| 116 | 731 // ** THE JUMP-IN CODE ** |
| 732 // ** for the asm code ** | |
| 167 | 733 ////////////////////////////////////////////////////////////////////////////// |
| 734 ////////////////////////////////////////////////////////////////////////////// | |
|
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735 |
| 167 | 736 ////////////////////////////////////////////////////////////////////////////// |
|
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737 // Called every 2 seconds during diving. |
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738 // update tissues every time. |
| 184 | 739 // |
|
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740 // Every 6 seconds (or slower when TTS > 16): |
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741 // - update deco table (char_O_deco_time/depth) with new values. |
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742 // - update ascent time, |
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743 // - set status to zero (so we can check there is new results). |
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744 // |
| 116 | 745 void deco_calc_hauptroutine(void) |
| 746 { | |
|
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747 RESET_C_STACK |
| 116 | 748 calc_hauptroutine(); |
| 749 int_O_desaturation_time = 65535; | |
| 750 } | |
| 751 | |
| 167 | 752 ////////////////////////////////////////////////////////////////////////////// |
| 184 | 753 // Reset decompression model: |
| 754 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 755 // + Reset last stop to 0m | |
| 756 // + Reset all model output. | |
| 116 | 757 void deco_clear_tissue(void) |
| 758 { | |
|
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759 RESET_C_STACK |
| 116 | 760 clear_tissue(); |
| 761 } | |
| 762 | |
| 167 | 763 ////////////////////////////////////////////////////////////////////////////// |
| 278 | 764 // Called every 1 min during decoplanning. |
| 765 // Update tissues for 1 min. | |
| 766 // | |
| 767 void deco_calc_tissue(void) | |
| 768 { | |
| 769 RESET_C_STACK | |
| 770 calc_hauptroutine_update_tissues(); | |
| 771 } | |
| 772 | |
| 773 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 774 |
| 116 | 775 void deco_calc_wo_deco_step_1_min(void) |
| 776 { | |
|
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777 RESET_C_STACK |
| 116 | 778 calc_wo_deco_step_1_min(); |
| 779 deco_calc_desaturation_time(); | |
| 780 } | |
| 781 | |
| 167 | 782 ////////////////////////////////////////////////////////////////////////////// |
| 783 | |
| 368 | 784 void deco_calc_dive_interval(void) |
| 785 { | |
| 786 RESET_C_STACK | |
| 787 calc_dive_interval(); | |
| 788 } | |
| 789 | |
| 241 | 790 |
| 791 ////////////////////////////////////////////////////////////////////////////// | |
| 792 // Find current gas in the list (if any). | |
| 793 // | |
| 513 | 794 // Input: char_I_current_gas = 1..6 |
| 241 | 795 // |
| 513 | 796 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. |
| 241 | 797 // |
| 798 static void gas_switch_find_current(void) | |
| 799 { | |
| 513 | 800 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
|
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801 |
| 388 | 802 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 |
|
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803 { |
| 388 | 804 sim_gas_last_used = char_I_current_gas; |
| 805 | |
| 806 // Note: if current is first gas, we must find it, but not set | |
| 807 // last depth change to surface. | |
| 808 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
| 809 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
| 241 | 810 } |
| 388 | 811 else |
| 812 sim_gas_last_used = 0; // Gas 6 = manual set | |
| 241 | 813 } |
| 814 | |
| 167 | 815 ////////////////////////////////////////////////////////////////////////////// |
| 217 | 816 // Find deepest available gas. |
| 201 | 817 // |
| 241 | 818 // Input: temp_depth_limit, |
| 819 // deco_gas_change[] | |
| 820 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
| 212 | 821 // |
| 241 | 822 // RETURNS TRUE if a stop is needed for gas switch. |
| 823 // | |
| 824 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
| 212 | 825 // |
| 241 | 826 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
| 827 // are null), or during the ascent to make sure we are not passing a | |
| 828 // stop (in which case both can be already set). | |
| 829 // | |
| 830 static unsigned char gas_switch_deepest(void) | |
| 201 | 831 { |
| 241 | 832 overlay unsigned char switch_deco = 0, switch_last = 0; |
| 201 | 833 |
| 834 if (char_I_const_ppO2 == 0) | |
| 835 { | |
| 225 | 836 overlay unsigned char j; |
| 837 | |
| 241 | 838 // Loop over all enabled gas, to find the deepest one, |
|
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839 // above last used gas, but below temp_depth_limit. |
| 338 | 840 for(j=0; j<NUM_GAS; ++j) |
| 225 | 841 { |
| 241 | 842 // Gas not (yet) allowed ? Skip ! |
| 843 if( temp_depth_limit > deco_gas_change[j] ) | |
| 844 continue; | |
| 845 | |
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846 // Gas deeper (or equal) than the current one ? Skip ! |
| 241 | 847 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
| 848 continue; | |
| 849 | |
| 850 // First, or deeper ? | |
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851 if( switch_deco < deco_gas_change[j] ) |
| 241 | 852 { |
| 853 switch_deco = deco_gas_change[j]; | |
| 388 | 854 switch_last = j+1; // 1..5 |
| 241 | 855 } |
| 225 | 856 } |
| 201 | 857 } |
| 858 | |
| 203 | 859 // If there is a better gas available |
| 241 | 860 if( switch_deco ) |
| 201 | 861 { |
| 241 | 862 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
| 201 | 863 |
| 241 | 864 // Should restart gas-switch delay only when gas do changes... |
| 865 assert( sim_gas_delay <= sim_dive_mins ); | |
| 217 | 866 |
| 241 | 867 sim_gas_last_depth = switch_deco; |
| 868 sim_gas_last_used = switch_last; | |
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869 sim_gas_delay = read_custom_function(55) |
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870 + sim_dive_mins; |
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871 temp_depth_limit = switch_deco; |
| 217 | 872 |
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873 return 1; |
| 217 | 874 } |
| 875 | |
| 241 | 876 sim_gas_delay = 0; |
| 877 return 0; | |
| 217 | 878 } |
| 879 | |
| 880 ////////////////////////////////////////////////////////////////////////////// | |
| 881 // Calculate gas switches | |
| 882 // | |
| 883 // | |
| 884 // Input: N2_ratio, He_ratio. | |
| 885 // sim_gas_last_used | |
| 886 // | |
| 887 // Output: calc_N2_ratio, calc_He_ratio | |
| 888 // | |
| 241 | 889 static void gas_switch_set(void) |
| 217 | 890 { |
| 338 | 891 assert( 0 <= sim_gas_last_used && sim_gas_last_used <= NUM_GAS ); |
| 217 | 892 |
| 388 | 893 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. |
| 224 | 894 { |
| 895 calc_N2_ratio = N2_ratio; | |
| 896 calc_He_ratio = He_ratio; | |
| 897 } | |
| 898 else | |
| 899 { | |
| 900 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
| 901 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
| 217 | 902 } |
| 201 | 903 |
| 904 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
| 905 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
| 906 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
| 907 } | |
| 908 | |
| 909 ////////////////////////////////////////////////////////////////////////////// | |
| 910 // | |
| 212 | 911 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
| 509 | 912 // temp_deco : simulated respiration pressure |
| 276 | 913 // float_deco_distance : security factor. |
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914 // Water-vapor pressure inside limbs (ppWater). |
| 212 | 915 // |
| 236 | 916 // Output: ppN2, ppHe. |
| 212 | 917 // |
| 918 static void sim_alveolar_presures(void) | |
| 201 | 919 { |
| 212 | 920 overlay float deco_diluent = temp_deco; // new in v.101 |
| 921 | |
| 276 | 922 // Take deco offset into account, but not at surface. |
| 923 // Note: this should be done on ambiant pressure, hence before | |
| 924 // computing the diluant partial pressure... | |
| 925 if( deco_diluent > pres_surface ) | |
| 926 deco_diluent += float_deco_distance; | |
| 927 | |
| 212 | 928 //---- CCR mode : deco gas switch ? -------------------------------------- |
| 276 | 929 if( char_I_const_ppO2 != 0 ) |
| 201 | 930 { |
| 276 | 931 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
| 932 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
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933 // ppWater in the equations below: |
| 321 | 934 deco_diluent -= const_ppO2; |
| 276 | 935 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
| 212 | 936 |
| 937 if (deco_diluent > temp_deco) | |
| 938 deco_diluent = temp_deco; | |
| 201 | 939 } |
| 940 | |
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941 if( deco_diluent > ppWater ) |
| 201 | 942 { |
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943 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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944 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
| 201 | 945 } |
| 946 else | |
| 947 { | |
| 236 | 948 ppN2 = 0.0; |
| 201 | 949 ppHe = 0.0; |
| 950 } | |
| 236 | 951 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
| 201 | 952 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
| 953 } | |
| 954 | |
| 955 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 956 // clear_tissue |
| 957 // | |
| 165 | 958 // optimized in v.101 (var_N2_a) |
| 167 | 959 // |
| 960 // preload tissues with standard pressure for the given ambient pressure. | |
| 961 // Note: fixed N2_ratio for standard air. | |
| 201 | 962 // |
| 167 | 963 static void clear_tissue(void) |
| 116 | 964 { |
|
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965 overlay float p; |
| 116 | 966 flag_in_divemode = 0; |
| 967 | |
| 167 | 968 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
| 969 N2_ratio = 0.7902; | |
| 212 | 970 pres_respiration = int_I_pres_respiration * 0.001; |
| 164 | 971 |
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972 p = N2_ratio * (pres_respiration - ppWater); |
| 338 | 973 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 974 { |
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975 // cycle through the 16 Bühlmann N2 tissues |
| 339 | 976 pres_tissue_N2[ci] = p; |
| 197 | 977 |
| 978 // cycle through the 16 Bühlmann tissues for Helium | |
| 339 | 979 pres_tissue_He[ci] = 0.0; |
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980 } |
| 116 | 981 |
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982 clear_deco_table(); |
| 126 | 983 char_O_deco_status = 0; |
| 984 char_O_nullzeit = 0; | |
| 168 | 985 int_O_ascenttime = 0; |
| 126 | 986 char_O_gradient_factor = 0; |
| 987 char_O_relative_gradient_GF = 0; | |
| 258 | 988 |
| 989 calc_lead_tissue_limit = 0.0; | |
| 990 char_O_gtissue_no = 0; | |
| 167 | 991 } |
| 116 | 992 |
| 167 | 993 ////////////////////////////////////////////////////////////////////////////// |
| 994 // calc_hauptroutine | |
| 995 // | |
| 996 // this is the major code in dive mode calculates: | |
| 116 | 997 // the tissues, |
| 167 | 998 // the bottom time, |
| 999 // and simulates the ascend with all deco stops. | |
| 171 | 1000 // |
| 1001 // The deco_state sequence is : | |
| 1002 // 3 (at surface) | |
| 1003 // +---> 0 : calc nullzeit | |
| 1004 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 1005 // | +-> 1 : simulate up to 16min of stops. | |
| 1006 // | +------< not finished | |
| 1007 // +--------< finish | |
| 1008 // | |
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1009 // Added steps 6,5 for @+5 calculation: |
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1010 // 6 = ascent to first stop (same as 2), except continue to 7 |
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1011 // 7 = same as 1, except loop to 7. |
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1012 // |
| 167 | 1013 static void calc_hauptroutine(void) |
| 116 | 1014 { |
| 241 | 1015 static unsigned char backup_gas_used = 0; |
| 1016 static unsigned char backup_gas_depth = 0; | |
| 217 | 1017 static unsigned char backup_gas_delay = 0; |
| 186 | 1018 |
| 116 | 1019 calc_hauptroutine_data_input(); |
| 1020 | |
| 1021 calc_hauptroutine_update_tissues(); | |
| 1022 calc_gradient_factor(); | |
| 1023 | |
| 167 | 1024 // toggle between calculation for nullzeit (bottom time), |
| 1025 // deco stops | |
| 1026 // and more deco stops (continue) | |
| 1027 switch( char_O_deco_status ) | |
| 116 | 1028 { |
| 186 | 1029 case 3: //---- At surface: start a new dive ------------------------------ |
| 1030 clear_deco_table(); | |
| 1031 copy_deco_table(); | |
| 200 | 1032 int_O_ascenttime = 0; // Reset DTR. |
| 323 | 1033 int_O_extra_ascenttime = 0; |
| 200 | 1034 char_O_nullzeit = 0; // Reset bottom time. |
| 278 | 1035 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
| 201 | 1036 |
| 217 | 1037 // Values that should be reset just once for the full real dive. |
| 1038 // This is used to record the lowest stop for the whole dive, | |
| 1039 // Including ACCROSS all simulated ascent. | |
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1040 low_depth = 0.0; |
| 217 | 1041 |
| 1042 // Reset gas switch history. | |
| 241 | 1043 backup_gas_used = sim_gas_last_used = 0; |
| 1044 backup_gas_depth = sim_gas_last_depth = 0; | |
| 217 | 1045 backup_gas_delay = sim_gas_delay = 0; |
| 203 | 1046 sim_dive_mins = 0; |
| 1047 break; | |
| 186 | 1048 |
| 167 | 1049 case 0: //---- bottom time ----------------------------------------------- |
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1050 default: |
| 509 | 1051 gas_switch_find_current(); // Lookup for current gas & time. |
| 1052 gas_switch_set(); // setup calc_ratio's | |
| 1053 | |
| 167 | 1054 calc_nullzeit(); |
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1055 if( char_O_nullzeit > 0 ) // Some NDL time left ? |
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1056 { |
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1057 char_O_deco_status = 0; // YES: recalc ndl next time. |
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1058 clear_deco_table(); // Also clear stops ! |
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1059 copy_deco_table(); |
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1060 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) |
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1061 } |
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1062 else |
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1063 char_O_deco_status = 2; // NO: calc ascent next time. |
| 186 | 1064 break; |
| 1065 | |
| 1066 case 2: //---- Simulate ascent to first stop ----------------------------- | |
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1067 case 6: // @+5min variation |
| 203 | 1068 // Check proposed gas at begin of ascent simulation |
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1069 sim_dive_mins = int_I_divemins; // Init current time. |
| 241 | 1070 |
| 532 | 1071 gas_switch_find_current(); // Lookup for current gas & time. |
| 1072 gas_switch_set(); // setup calc_ratio's | |
| 1073 | |
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1074 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1075 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
| 203 | 1076 backup_gas_delay = sim_gas_delay; |
| 186 | 1077 |
| 1078 sim_ascent_to_first_stop(); | |
| 201 | 1079 |
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1080 // Calc stops next time (deco or gas switch). |
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1081 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
| 167 | 1082 break; |
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1083 |
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1084 case 1: //---- Simulate stops -------------------------------------------- |
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1085 case 5: // @+5 variation. |
| 167 | 1086 calc_hauptroutine_calc_deco(); |
| 186 | 1087 |
| 1088 // If simulation is finished, restore the GF low reference, so that | |
| 1089 // next ascent simulation is done from the current depth: | |
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1090 if( (char_O_deco_status & 3) == 0 ) |
| 186 | 1091 { |
| 241 | 1092 sim_gas_last_used = backup_gas_used; |
| 1093 sim_gas_last_depth = backup_gas_depth; | |
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1094 sim_gas_delay = backup_gas_delay; |
| 186 | 1095 } |
| 167 | 1096 break; |
| 116 | 1097 } |
| 167 | 1098 |
| 116 | 1099 } |
| 1100 | |
| 167 | 1101 ////////////////////////////////////////////////////////////////////////////// |
| 1102 // calc_hauptroutine_data_input | |
| 1103 // | |
| 1104 // Reset all C-code dive parameters from their ASM-code values. | |
| 1105 // Detect gas change condition. | |
| 1106 // | |
| 116 | 1107 void calc_hauptroutine_data_input(void) |
| 1108 { | |
| 203 | 1109 overlay short int_temp; |
|
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1110 overlay unsigned char g; |
| 126 | 1111 |
| 197 | 1112 pres_respiration = int_I_pres_respiration * 0.001; |
| 1113 pres_surface = int_I_pres_surface * 0.001; | |
| 1114 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1115 He_ratio = char_I_He_ratio * 0.01; | |
| 1116 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
| 116 | 1117 |
| 126 | 1118 // ____________________________________________________ |
| 1119 // | |
| 1120 // _____________ G A S _ C H A N G E S ________________ | |
| 1121 // ____________________________________________________ | |
| 1122 | |
| 212 | 1123 // Keep a margin of 150mbar = 1.50m |
| 1124 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1125 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 126 | 1126 |
| 203 | 1127 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
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1128 for(g=0; g < NUM_GAS; ++g) |
| 126 | 1129 { |
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1130 deco_gas_change[g] = 0; |
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1131 if(char_I_deco_gas_change[g]) |
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1132 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) |
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1133 deco_gas_change[g] = char_I_deco_gas_change[g]; |
| 126 | 1134 } |
| 116 | 1135 |
| 197 | 1136 const_ppO2 = char_I_const_ppO2 * 0.01; |
| 1137 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1138 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1139 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1140 GF_high = char_I_GF_High_percentage * 0.01; | |
| 126 | 1141 GF_delta = GF_high - GF_low; |
| 116 | 1142 } |
| 1143 | |
| 167 | 1144 ////////////////////////////////////////////////////////////////////////////// |
| 171 | 1145 // |
| 1146 // | |
| 116 | 1147 void calc_hauptroutine_update_tissues(void) |
| 1148 { | |
| 197 | 1149 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
| 1150 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
| 1151 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
| 237 | 1152 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1153 |
| 276 | 1154 pres_diluent = pres_respiration; |
| 307 | 1155 if( char_I_const_ppO2 != 0 ) // new in v.101 |
| 186 | 1156 { |
| 322 | 1157 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
| 1158 | |
| 276 | 1159 pres_diluent -= const_ppO2; // new in v.101 |
| 1160 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
| 321 | 1161 if( pres_diluent < 0.0 ) |
| 1162 pres_diluent = 0.0; | |
| 276 | 1163 if( pres_diluent > pres_respiration ) // new in v.101 |
| 1164 pres_diluent = pres_respiration; // new in v.101 | |
| 307 | 1165 |
| 321 | 1166 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
| 322 | 1167 |
| 326 | 1168 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
| 322 | 1169 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
| 1170 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
| 186 | 1171 } |
| 307 | 1172 |
|
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1173 if( pres_diluent > ppWater ) // new in v.101 |
| 116 | 1174 { |
| 307 | 1175 overlay float EAD, END; |
| 1176 | |
|
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1177 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1178 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
| 307 | 1179 |
| 1180 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
| 1181 // with plain air. | |
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1182 // ppN2 = 79% * (P_EAD - ppWater) |
| 307 | 1183 // EAD = (P_EAD - Psurface) * 10 |
|
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1184 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
| 317 | 1185 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
| 307 | 1186 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
| 317 | 1187 char_O_EAD = (unsigned char)(EAD + 0.5); |
| 307 | 1188 |
| 1189 // END : Equivalent Narcotic Dive. | |
| 1190 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
| 1191 // 0.23 btw). Hence the formula becomes: | |
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1192 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
| 317 | 1193 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
| 307 | 1194 // |
| 1195 // Source cited: | |
| 1196 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
| 1197 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
| 317 | 1198 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
| 307 | 1199 if( END < 0.0 || END > 245.5 ) END = 0.0; |
| 317 | 1200 char_O_END = (unsigned char)(END + 0.5); |
| 116 | 1201 } |
| 167 | 1202 else // new in v.101 |
| 116 | 1203 { |
| 236 | 1204 ppN2 = 0.0; // new in v.101 |
| 200 | 1205 ppHe = 0.0; // new in v.101 |
| 307 | 1206 char_O_EAD = char_O_END = 0; |
| 116 | 1207 } |
| 1208 | |
| 1209 if(!char_I_step_is_1min) | |
| 192 | 1210 calc_tissue(0); |
| 116 | 1211 else |
| 192 | 1212 calc_tissue(1); |
| 186 | 1213 |
| 192 | 1214 // Calc limit for surface, ie. GF_high. |
| 258 | 1215 calc_limit(); |
| 186 | 1216 |
| 203 | 1217 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
| 339 | 1218 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
| 171 | 1219 } |
| 1220 | |
| 116 | 1221 |
| 167 | 1222 ////////////////////////////////////////////////////////////////////////////// |
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1223 // Compute stops. |
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1224 // |
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1225 // Note: because this can be very long, break on 16 iterations, and set state |
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1226 // to 0 when finished, or to 1 when needing to continue. |
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1227 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
|
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1228 // break the loop when total time > 512msec. |
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1229 // |
| 116 | 1230 void calc_hauptroutine_calc_deco(void) |
| 1231 { | |
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1232 overlay unsigned char loop; |
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1233 |
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1234 for(loop = 0; loop < 16; ++loop) |
| 116 | 1235 { |
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1236 // Limit loops to 512ms, using the RTC timer 3: |
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1237 if( tmr3() & (512*32) ) |
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1238 break; |
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1239 |
| 241 | 1240 // Do not ascent while doing a gas switch ? |
| 203 | 1241 if( sim_gas_delay <= sim_dive_mins ) |
| 1242 { | |
| 241 | 1243 if( calc_nextdecodepth() ) |
| 1244 { | |
| 1245 if( temp_depth_limit == 0 ) | |
| 1246 goto Surface; | |
| 116 | 1247 |
| 241 | 1248 //---- We hit a stop at temp_depth_limit --------------------- |
| 317 | 1249 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
| 241 | 1250 + pres_surface; // To absolute. |
| 471 | 1251 if( !update_deco_table() ) // Adds a one minute stops. |
| 1252 goto Surface; // Deco table full: abort... | |
| 241 | 1253 } |
| 1254 else | |
| 1255 { | |
| 1256 //---- No stop ----------------------------------------------- | |
| 317 | 1257 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
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1258 |
| 241 | 1259 //---- Finish computations once surface is reached ----------- |
| 1260 if( temp_deco <= pres_surface ) | |
| 1261 { | |
| 1262 Surface: | |
| 471 | 1263 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
|
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1264 copy_deco_table(); |
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1265 |
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1266 calc_ascenttime(); |
| 471 | 1267 char_O_deco_status = 0; // calc nullzeit next time. |
| 1268 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
| 241 | 1269 return; |
| 1270 } | |
| 1271 } | |
| 212 | 1272 } |
| 1273 else | |
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1274 { |
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1275 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1276 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
| 471 | 1277 if( !update_deco_table() ) // Just pass one minute. |
| 1278 goto Surface; // Deco table full: abort... | |
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1279 } |
| 197 | 1280 |
| 241 | 1281 //---- Then update tissue -------------------------------------------- |
| 203 | 1282 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1283 gas_switch_set(); // Apply any simulated gas change, once validated. |
| 212 | 1284 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
| 192 | 1285 sim_tissue(1); // Simulate compartiments for 1 minute. |
| 116 | 1286 } |
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1287 |
|
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1288 // Surface not reached, need more stops... for menu animation. |
| 278 | 1289 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
| 116 | 1290 } |
| 1291 | |
| 167 | 1292 ////////////////////////////////////////////////////////////////////////////// |
|
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1293 // Simulation ascention to first deco stop. |
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1294 // |
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1295 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1296 // there is no need to break on more that 16 iterations |
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1297 // (or we are already in deep shit). |
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1298 // |
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1299 // Input: pres_respiration |
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1300 // Output: temp_deco |
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1301 // |
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1302 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1303 // before ascent. |
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1304 void sim_ascent_to_first_stop(void) |
| 116 | 1305 { |
| 171 | 1306 update_startvalues(); |
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1307 clear_deco_table(); |
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1308 |
| 200 | 1309 temp_deco = pres_respiration; // Starts from current real depth. |
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1310 |
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1311 // Are we doing the special @+5min variation ? |
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1312 if(char_O_deco_status & 4) |
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1313 sim_extra_time(); |
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1314 |
| 212 | 1315 // Do we have a gas switch going on ? |
| 1316 if( sim_gas_delay > sim_dive_mins ) | |
| 1317 return; | |
| 1318 | |
| 241 | 1319 //---- Loop until first stop, gas switch, or surface is reached ---------- |
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1320 for(;;) |
| 116 | 1321 { |
| 461 | 1322 overlay float old_deco = temp_deco; // Pamb backup (bars) |
| 460 | 1323 |
| 241 | 1324 // Try ascending 1 full minute. |
| 461 | 1325 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. |
| 1326 if( temp_deco < pres_surface ) // But don't go over surface. | |
| 1327 temp_deco = pres_surface; | |
| 203 | 1328 |
| 461 | 1329 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because |
| 1330 // one minute passed. | |
| 212 | 1331 sim_limit(GF_low); |
| 1332 | |
| 1333 // Did we reach deepest remaining stop ? | |
| 241 | 1334 if( temp_deco < sim_lead_tissue_limit ) |
| 212 | 1335 { |
| 461 | 1336 temp_deco = old_deco; // Restore last correct depth, |
| 1337 break; // Do no spend a minute more. | |
| 212 | 1338 } |
| 1339 | |
| 203 | 1340 // Did we reach surface ? |
| 460 | 1341 // NOTE: we should round BEFORE checking surface is reached. |
| 461 | 1342 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
| 1343 if( temp_depth_limit == 0 ) | |
| 203 | 1344 { |
| 1345 temp_deco = pres_surface; // Yes: finished ! | |
| 1346 break; | |
| 1347 } | |
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1348 |
| 241 | 1349 // Check for gas change below new depth ? |
| 1350 if( gas_switch_deepest() ) | |
| 1351 { | |
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1352 assert( temp_depth_limit > 0); |
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1353 |
| 317 | 1354 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
| 212 | 1355 break; |
| 241 | 1356 } |
| 171 | 1357 |
| 203 | 1358 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1359 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
| 203 | 1360 sim_tissue(1); // and update tissues for 1 min. |
| 1361 } | |
| 167 | 1362 } |
| 116 | 1363 |
| 167 | 1364 ////////////////////////////////////////////////////////////////////////////// |
|
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1365 // Simulation extra time at the current depth. |
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1366 // |
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1367 // This routine is used for @+5min feature. |
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1368 void sim_extra_time(void) |
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1369 { |
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1370 overlay unsigned char extra = read_custom_function(58); |
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1371 do { |
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1372 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1373 sim_tissue(1); // and update tissues for 1 min. |
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1374 } while( --extra != 0 ); |
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1375 } |
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1376 |
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1377 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 1378 // calc_tissue |
| 1379 // | |
| 116 | 1380 // optimized in v.101 |
| 167 | 1381 // |
| 184 | 1382 static void calc_tissue(PARAMETER unsigned char period) |
| 116 | 1383 { |
| 251 | 1384 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1385 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1386 |
| 338 | 1387 for (ci=0;ci<NUM_COMP;ci++) |
| 126 | 1388 { |
| 258 | 1389 read_buhlmann_times(period); // 2 sec or 1 min period. |
| 116 | 1390 |
| 126 | 1391 // N2 |
| 339 | 1392 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1393 temp_tissue_safety(); |
| 339 | 1394 pres_tissue_N2[ci] += temp_tissue; |
| 165 | 1395 |
| 126 | 1396 // He |
| 339 | 1397 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
| 126 | 1398 temp_tissue_safety(); |
| 339 | 1399 pres_tissue_He[ci] += temp_tissue; |
| 192 | 1400 } |
| 167 | 1401 } |
| 116 | 1402 |
| 167 | 1403 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1404 // calc_limit |
| 167 | 1405 // |
| 192 | 1406 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
| 167 | 1407 // |
| 258 | 1408 static void calc_limit(void) |
| 167 | 1409 { |
| 192 | 1410 char_O_gtissue_no = 255; |
| 1411 calc_lead_tissue_limit = 0.0; | |
| 1412 | |
| 338 | 1413 for(ci=0; ci<NUM_COMP;ci++) |
| 192 | 1414 { |
| 339 | 1415 overlay float N2 = pres_tissue_N2[ci]; |
| 1416 overlay float He = pres_tissue_He[ci]; | |
|
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1417 overlay float p = N2 + He; |
| 192 | 1418 |
| 258 | 1419 read_buhlmann_coefficients(); |
|
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1420 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1421 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
| 116 | 1422 |
| 192 | 1423 // Apply the Eric Baker's varying gradient factor correction. |
| 1424 // Note: the correction factor depends both on GF and b, | |
| 1425 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1426 // so that can change who is the leading gas... | |
| 1427 // Note: Also depends of the GF. So the calcul is different for | |
| 1428 // GF_low, current GF, or GF_high... | |
| 1429 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1430 // hence what would happend at surface, | |
| 1431 // hence at GF_high. | |
| 509 | 1432 if( char_I_deco_model != 0 ) |
| 258 | 1433 p = ( p - var_N2_a * GF_high) * var_N2_b |
| 1434 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
| 192 | 1435 else |
| 1436 p = (p - var_N2_a) * var_N2_b; | |
| 258 | 1437 if( p < 0.0 ) p = 0.0; |
| 192 | 1438 |
| 1439 if( p > calc_lead_tissue_limit ) | |
| 1440 { | |
| 1441 char_O_gtissue_no = ci; | |
| 1442 calc_lead_tissue_limit = p; | |
| 1443 } | |
| 1444 } | |
| 197 | 1445 |
| 338 | 1446 assert( char_O_gtissue_no < NUM_COMP ); |
| 197 | 1447 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
| 167 | 1448 } |
| 1449 | |
| 1450 ////////////////////////////////////////////////////////////////////////////// | |
| 1451 // calc_nullzeit | |
| 1452 // | |
| 1453 // calculates the remaining bottom time | |
| 1454 // | |
|
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1455 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second |
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1456 // exponential term to the M-value equation, making it impossible to |
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1457 // invert... So we have to make a fast-simu until we find a better way. |
| 509 | 1458 // |
| 1459 // Input: pres_respiration | |
| 1460 // Output: char_O_nullzeit | |
| 167 | 1461 // |
| 1462 static void calc_nullzeit(void) | |
| 1463 { | |
|
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1464 //---- Compute ppN2 and ppHe --------------------------------------------- |
| 509 | 1465 temp_deco = pres_respiration; |
| 1466 sim_alveolar_presures(); | |
| 167 | 1467 |
| 509 | 1468 char_O_nullzeit = 240; |
| 1469 for(ci=0; ci<NUM_COMP; ci++) | |
| 1470 { | |
|
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1471 //---- Read A/B values and loading factor for N2 and He -------------- |
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1472 overlay float tN2 = pres_tissue_N2[ci]; |
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1473 overlay float tHe = pres_tissue_He[ci]; |
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1474 overlay float t = tN2 + tHe; |
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1475 overlay unsigned char ndl; |
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1476 overlay unsigned char period = 10; |
| 192 | 1477 |
| 509 | 1478 read_buhlmann_coefficients(); |
|
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1479 read_buhlmann_times(2); // Starts with a 10min period. |
| 509 | 1480 |
|
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1481 //---- Simulate for that tissue -------------------------------------- |
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1482 // NOTE: No need to simulate for longuer than the already found NDL. |
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1483 for(ndl=0; ndl<char_O_nullzeit;) |
| 509 | 1484 { |
|
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1485 //---- Compute updated mix M-value at surface |
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1486 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; |
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1487 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; |
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1488 overlay float M0 = (a + pres_surface/b); |
| 116 | 1489 |
|
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1490 //---- Add 10min/1min to N2/He tissues |
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1491 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; |
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1492 overlay float dTHe = (ppHe - tHe) * var_He_e; |
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1493 |
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1494 //---- Apply security margin when using the non-GF model |
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1495 if( char_I_deco_model == 0 ) |
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1496 { |
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1497 dTN2 *= float_saturation_multiplier; |
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1498 dTHe *= float_saturation_multiplier; |
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1499 } |
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1500 else // Or GF-based model |
| 509 | 1501 M0 = GF_high * (M0 - pres_surface) + pres_surface; |
| 167 | 1502 |
|
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1503 //---- Simulate off-gasing while going to surface |
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1504 // TODO ! |
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1505 // dTN2 -= exp( ... ascent time ... ppN2...) |
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1506 // dTHe -= exp( ... ascent time ... ppHe...) |
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1507 |
|
534
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1508 //---- Ok now, and still ok to surface after 1 or 10 minutes ? |
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1509 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) |
| 509 | 1510 { |
|
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1511 tN2 += dTN2; // YES: apply gas loadings, |
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1512 tHe += dTHe; |
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1513 t = tN2 + tHe; |
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1514 ndl += period; // increment NDL, |
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1515 continue; // and loop. |
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1516 } |
| 116 | 1517 |
|
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1518 //---- Should we retry with smaller steps ? |
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1519 if( period == 10 ) |
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1520 { |
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1521 read_buhlmann_times(1); // 1min coefs. |
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1522 period = 1; |
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1523 continue; |
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1524 } |
| 167 | 1525 |
|
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1526 //---- ELSE make a linear approx for the last minute |
| 524 | 1527 // Usefull to have a meaningfull rounding of NDL. |
| 1528 // But ONLY it positive (negativ casted to unsigned is bad). | |
| 1529 if( M0 > t ) | |
| 1530 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
|
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1531 break; |
| 509 | 1532 } |
|
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1533 |
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1534 // Keep the shortest NDL found |
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1535 if( ndl < char_O_nullzeit ) |
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1536 char_O_nullzeit = ndl; |
| 339 | 1537 } |
| 167 | 1538 } |
| 116 | 1539 |
| 167 | 1540 ////////////////////////////////////////////////////////////////////////////// |
| 1541 // calc_ascenttime | |
| 1542 // | |
|
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1543 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1544 // and all stops. |
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1545 // |
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1546 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
|
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1547 static void calc_ascenttime(void) |
| 116 | 1548 { |
| 323 | 1549 overlay unsigned char x; |
| 1550 overlay unsigned short sum; | |
| 168 | 1551 |
| 323 | 1552 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
| 1553 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
| 1554 if (ascent < 0.0) | |
| 1555 ascent = 0.0; | |
| 1556 sum = (unsigned short)(ascent + 0.99); | |
|
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1557 |
| 338 | 1558 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
| 323 | 1559 sum += (unsigned short)internal_deco_time[x]; |
| 1560 | |
| 1561 if( char_O_deco_status == 1 ) | |
| 1562 int_O_ascenttime = sum; | |
| 126 | 1563 else |
| 323 | 1564 int_O_extra_ascenttime = sum; |
| 167 | 1565 } |
| 116 | 1566 |
| 167 | 1567 ////////////////////////////////////////////////////////////////////////////// |
| 1568 // update_startvalues | |
| 1569 // | |
| 116 | 1570 // updated in v.102 |
| 167 | 1571 // |
| 116 | 1572 void update_startvalues(void) |
| 1573 { | |
| 167 | 1574 overlay unsigned char x; |
| 116 | 1575 |
| 201 | 1576 // Start ascent simulation with current tissue partial pressures. |
| 339 | 1577 for(x=0; x<NUM_COMP; x++) |
| 116 | 1578 { |
| 339 | 1579 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
| 1580 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
| 116 | 1581 } |
| 197 | 1582 |
| 201 | 1583 // No leading tissue (yet) for this ascent simulation. |
| 197 | 1584 sim_lead_tissue_limit = 0.0; |
| 1585 sim_lead_tissue_no = 255; | |
| 167 | 1586 } |
| 116 | 1587 |
| 167 | 1588 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1589 // sim_tissue |
| 167 | 1590 // |
| 116 | 1591 // optimized in v.101 |
| 167 | 1592 // |
| 1593 // Function very simular to calc_tissue, but: | |
| 1594 // + Use a 1min or 10min period. | |
| 1595 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 184 | 1596 static void sim_tissue(PARAMETER unsigned char period) |
| 116 | 1597 { |
| 251 | 1598 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1599 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1600 |
| 338 | 1601 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1602 { |
| 258 | 1603 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
| 165 | 1604 |
| 126 | 1605 // N2 |
| 339 | 1606 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1607 temp_tissue_safety(); |
| 339 | 1608 sim_pres_tissue_N2[ci] += temp_tissue; |
| 126 | 1609 |
| 1610 // He | |
| 339 | 1611 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
| 126 | 1612 temp_tissue_safety(); |
| 339 | 1613 sim_pres_tissue_He[ci] += temp_tissue; |
| 192 | 1614 } |
| 167 | 1615 } |
| 116 | 1616 |
| 167 | 1617 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1618 // sim_limit() |
| 1619 // | |
| 1620 // New in v.111 | |
| 1621 // | |
| 1622 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1623 // different depth, because it depends on current gradient factor. | |
| 167 | 1624 // |
| 192 | 1625 static void sim_limit(PARAMETER float GF_current) |
| 116 | 1626 { |
| 212 | 1627 assert( 0.0 < GF_current && GF_current <= 1.0f); |
| 1628 | |
| 192 | 1629 sim_lead_tissue_limit = 0.0; |
| 212 | 1630 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
| 192 | 1631 |
| 338 | 1632 for(ci=0; ci<NUM_COMP; ci++) |
| 192 | 1633 { |
| 339 | 1634 overlay float N2 = sim_pres_tissue_N2[ci]; |
| 1635 overlay float He = sim_pres_tissue_He[ci]; | |
| 241 | 1636 overlay float p = N2 + He; |
| 192 | 1637 |
| 258 | 1638 read_buhlmann_coefficients(); |
| 241 | 1639 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
| 1640 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 192 | 1641 |
| 1642 // Apply the Eric Baker's varying gradient factor correction. | |
| 1643 // Note: the correction factor depends both on GF and b, | |
| 1644 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1645 // so that can change who is the leading gas... | |
| 1646 // Note: Also depends of the GF_current... | |
| 509 | 1647 if( char_I_deco_model != 0 ) |
| 302 | 1648 p = ( p - var_N2_a * GF_current) |
| 1649 / (GF_current / var_N2_b + 1.0 - GF_current); | |
| 192 | 1650 else |
| 1651 p = (p - var_N2_a) * var_N2_b; | |
| 237 | 1652 if( p < 0.0 ) p = 0.0; |
| 192 | 1653 |
| 1654 if( p > sim_lead_tissue_limit ) | |
| 1655 { | |
| 1656 sim_lead_tissue_no = ci; | |
| 1657 sim_lead_tissue_limit = p; | |
| 1658 } | |
| 1659 } // for ci | |
| 197 | 1660 |
| 338 | 1661 assert( sim_lead_tissue_no < NUM_COMP ); |
| 237 | 1662 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
| 167 | 1663 } |
| 116 | 1664 |
| 167 | 1665 ////////////////////////////////////////////////////////////////////////////// |
|
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1666 // clear_deco_table |
| 167 | 1667 // |
| 1668 // unchanged in v.101 | |
| 1669 // | |
|
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1670 static void clear_deco_table(void) |
| 116 | 1671 { |
|
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1672 overlay unsigned char x; |
|
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1673 |
| 338 | 1674 for(x=0; x<NUM_STOPS; ++x) |
|
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1675 { |
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1676 internal_deco_time [x] = 0; |
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1677 internal_deco_depth[x] = 0; |
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1678 } |
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1679 } |
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1680 |
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1681 ////////////////////////////////////////////////////////////////////////////// |
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1682 // update_deco_table |
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1683 // |
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1684 // Add 1 min to current stop. |
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1685 // |
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1686 // Inputs: |
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1687 // temp_depth_limit = stop's depth, in meters. |
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1688 // In/Out: |
|
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1689 // internal_deco_depth[] : depth (in metres) of each stops. |
|
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1690 // internal_deco_time [] : time (in minutes) of each stops. |
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1691 // |
| 471 | 1692 static unsigned char update_deco_table() |
|
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1693 { |
| 192 | 1694 overlay unsigned char x; |
|
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1695 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
|
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1696 assert( temp_depth_limit > 0 ); // No stop at surface... |
|
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1697 |
| 338 | 1698 for(x=0; x<NUM_STOPS; ++x) |
| 192 | 1699 { |
| 212 | 1700 // Make sure deco-stops are recorded in order: |
|
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1701 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
| 212 | 1702 |
|
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1703 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
| 192 | 1704 { |
| 1705 // Do not overflow (max 255') | |
| 1706 if( internal_deco_time[x] < 255 ) | |
| 1707 { | |
| 1708 internal_deco_time[x]++; | |
| 471 | 1709 return 1; |
| 192 | 1710 } |
| 1711 // But store extra in the next stop... | |
|
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1712 } |
| 192 | 1713 |
|
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1714 if( internal_deco_depth[x] == 0 ) |
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1715 { |
| 192 | 1716 internal_deco_depth[x] = temp_depth_limit; |
|
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1717 if( sim_gas_delay >= sim_dive_mins ) |
|
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1718 internal_deco_depth[x] |= 0x80; |
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1719 |
|
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1720 internal_deco_time[x] = 1; |
| 471 | 1721 return 1; |
|
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1722 } |
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1723 } |
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1724 |
| 192 | 1725 // Can't store stops at more than 96m. |
| 1726 // Or stops at less that 3m too. | |
|
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1727 // Just do nothing with that... |
| 471 | 1728 return 0; |
| 167 | 1729 } |
| 116 | 1730 |
| 167 | 1731 ////////////////////////////////////////////////////////////////////////////// |
| 1732 // calc_gradient_factor | |
| 1733 // | |
| 165 | 1734 // optimized in v.101 (var_N2_a) |
| 116 | 1735 // new code in v.102 |
| 167 | 1736 // |
| 1737 static void calc_gradient_factor(void) | |
| 116 | 1738 { |
| 197 | 1739 overlay float gf; |
| 339 | 1740 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
| 1741 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
| 237 | 1742 |
| 338 | 1743 assert( char_O_gtissue_no < NUM_COMP ); |
| 237 | 1744 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1745 |
|
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1746 // tissue > respiration (currently off-gasing) |
| 302 | 1747 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
| 1748 // GF = 100% when respiration == limit. | |
|
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1749 temp_tissue = N2 + He; |
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1750 if( temp_tissue <= pres_respiration ) |
| 197 | 1751 gf = 0.0; |
| 1752 else | |
| 1753 { | |
|
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1754 overlay float limit = calc_lead_tissue_limit; |
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1755 // NOTE: in GF model, calc_lead_tissue_limit include already the |
|
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1756 // correction due to gradient factor. To compute the actual |
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1757 // current GF, we need to (re-)compute the raw ambiant-pressure |
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1758 // limit from the Bühlmann model. |
| 509 | 1759 if( char_I_deco_model != 0 ) |
|
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1760 { |
|
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1761 ci = char_O_gtissue_no; |
|
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1762 read_buhlmann_coefficients(); |
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1763 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1764 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1765 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1766 } |
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1767 |
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1768 gf = (temp_tissue - pres_respiration) |
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1769 / (temp_tissue - limit) |
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1770 * 100.0; |
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1771 if( gf > 254.5 ) gf = 255.0; |
| 197 | 1772 if( gf < 0.0 ) gf = 0.0; |
| 1773 } | |
|
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1774 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
| 116 | 1775 |
| 509 | 1776 if( char_I_deco_model != 0 ) // calculate relative gradient factor |
| 116 | 1777 { |
| 197 | 1778 overlay float rgf; |
| 1779 | |
|
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1780 if( low_depth < 1.5 ) |
| 197 | 1781 rgf = GF_high; |
| 1782 else | |
| 1783 { | |
| 317 | 1784 overlay float temp1 = low_depth * METER_TO_BAR; |
| 197 | 1785 overlay float temp2 = pres_respiration - pres_surface; |
| 186 | 1786 |
| 197 | 1787 if (temp2 <= 0) |
| 1788 rgf = GF_high; | |
| 1789 else if (temp2 >= temp1) | |
| 1790 rgf = GF_low; | |
| 1791 else | |
| 1792 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 1793 } | |
| 186 | 1794 |
| 197 | 1795 rgf = gf / rgf; // gf is already in percent |
| 1796 if( rgf < 0.0 ) rgf = 0.0; | |
|
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1797 if( rgf > 254.5 ) rgf = 255.0; |
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1798 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
| 116 | 1799 } // calc relative gradient factor |
| 1800 else | |
| 1801 { | |
| 186 | 1802 char_O_relative_gradient_GF = char_O_gradient_factor; |
| 116 | 1803 } |
| 167 | 1804 } |
| 116 | 1805 |
| 167 | 1806 ////////////////////////////////////////////////////////////////////////////// |
| 1807 // deco_calc_desaturation_time | |
| 1808 // | |
| 116 | 1809 // FIXED N2_ratio |
| 1810 // unchanged in v.101 | |
|
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1811 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
| 233 | 1812 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
| 167 | 1813 // |
| 116 | 1814 void deco_calc_desaturation_time(void) |
| 1815 { | |
|
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1816 RESET_C_STACK |
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1817 |
| 233 | 1818 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 1819 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1820 | |
| 237 | 1821 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
| 233 | 1822 pres_surface = int_I_pres_surface * 0.001; |
|
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1823 ppN2 = N2_ratio * (pres_surface - ppWater); |
| 126 | 1824 int_O_desaturation_time = 0; |
|
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1825 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 233 | 1826 |
| 339 | 1827 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1828 { |
| 251 | 1829 overlay unsigned short desat_time; // For a particular compartiment, in min. |
| 1830 overlay float temp1; | |
| 1831 overlay float temp2; | |
| 1832 overlay float temp3; | |
| 1833 overlay float temp4; | |
| 338 | 1834 |
| 509 | 1835 read_buhlmann_ht(); |
| 338 | 1836 |
| 126 | 1837 // saturation_time (for flight) and N2_saturation in multiples of halftime |
| 1838 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1839 // 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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1840 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
| 126 | 1841 // N2 |
| 339 | 1842 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
| 1843 temp2 = ppN2 - pres_tissue_N2[ci]; | |
| 126 | 1844 if (temp2 >= 0.0) |
| 1845 { | |
| 233 | 1846 temp1 = 0.0; |
| 1847 temp2 = 0.0; | |
| 126 | 1848 } |
| 1849 else | |
| 1850 temp1 = temp1 / temp2; | |
| 251 | 1851 if( 0.0 < temp1 && temp1 < 1.0 ) |
| 126 | 1852 { |
|
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1853 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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1854 // minus because log is negative. |
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1855 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
| 509 | 1856 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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1857 |
| 126 | 1858 } |
| 1859 else | |
| 1860 { | |
| 233 | 1861 temp1 = 0.0; |
| 1862 temp2 = 0.0; | |
| 126 | 1863 } |
| 116 | 1864 |
| 126 | 1865 // He |
| 339 | 1866 temp3 = 0.1 - pres_tissue_He[ci]; |
| 126 | 1867 if (temp3 >= 0.0) |
| 1868 { | |
| 233 | 1869 temp3 = 0.0; |
| 1870 temp4 = 0.0; | |
| 126 | 1871 } |
| 1872 else | |
| 339 | 1873 temp3 = - temp3 / pres_tissue_He[ci]; |
| 251 | 1874 if( 0.0 < temp3 && temp3 < 1.0 ) |
| 126 | 1875 { |
|
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1876 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
| 126 | 1877 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
| 1878 // minus because log is negative | |
| 509 | 1879 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
| 126 | 1880 } |
| 1881 else | |
| 1882 { | |
| 233 | 1883 temp3 = 0.0; |
| 1884 temp4 = 0.0; | |
| 126 | 1885 } |
| 116 | 1886 |
| 126 | 1887 // saturation_time (for flight) |
| 1888 if (temp4 > temp2) | |
| 203 | 1889 desat_time = (unsigned short)temp4; |
| 126 | 1890 else |
| 203 | 1891 desat_time = (unsigned short)temp2; |
| 252 | 1892 |
| 251 | 1893 if(desat_time > int_O_desaturation_time) |
| 1894 int_O_desaturation_time = desat_time; | |
| 116 | 1895 |
| 126 | 1896 // N2 saturation in multiples of halftime for display purposes |
| 339 | 1897 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 1898 temp2 = temp2 + 80.0; // set center | |
| 126 | 1899 if (temp2 < 0.0) |
| 1900 temp2 = 0.0; | |
| 1901 if (temp2 > 255.0) | |
| 1902 temp2 = 255.0; | |
| 339 | 1903 char_O_tissue_N2_saturation[ci] = (char)temp2; |
| 233 | 1904 |
| 126 | 1905 // He saturation in multiples of halftime for display purposes |
| 339 | 1906 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 1907 temp4 = temp4 + 80.0; // set center | |
| 126 | 1908 if (temp4 < 0.0) |
| 1909 temp4 = 0.0; | |
| 1910 if (temp4 > 255.0) | |
| 1911 temp4 = 255.0; | |
| 339 | 1912 char_O_tissue_He_saturation[ci] = (char)temp4; |
| 126 | 1913 } // for |
| 167 | 1914 } |
| 116 | 1915 |
| 167 | 1916 ////////////////////////////////////////////////////////////////////////////// |
| 1917 // calc_wo_deco_step_1_min | |
| 1918 // | |
| 116 | 1919 // FIXED N2 Ratio |
| 1920 // optimized in v.101 (...saturation_multiplier) | |
| 1921 // desaturation slowed down to 70,42% | |
| 167 | 1922 // |
| 1923 static void calc_wo_deco_step_1_min(void) | |
| 116 | 1924 { |
| 251 | 1925 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 1926 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
| 1927 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
| 1928 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1929 | |
| 126 | 1930 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
| 368 | 1931 pres_respiration = pres_surface = int_I_pres_surface * 0.001; |
| 1932 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 200 | 1933 ppHe = 0.0; |
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1934 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 197 | 1935 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 126 | 1936 |
| 339 | 1937 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
| 167 | 1938 |
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1939 clear_deco_table(); |
| 200 | 1940 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
| 126 | 1941 char_O_nullzeit = 0; |
| 168 | 1942 int_O_ascenttime = 0; |
| 323 | 1943 int_O_extra_ascenttime = 0; |
| 126 | 1944 calc_gradient_factor(); |
| 167 | 1945 } |
| 126 | 1946 |
| 167 | 1947 ////////////////////////////////////////////////////////////////////////////// |
| 368 | 1948 // calc_dive_interval |
| 1949 // | |
| 1950 // Prepare tissue for delay before the next dive simulation. | |
| 1951 // | |
| 1952 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
| 1953 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
| 1954 // | |
| 1955 // Should be protected by deco_push_tissues_to_vault(), | |
| 1956 // deco_pull_tissues_from_vault() | |
| 1957 // | |
| 1958 // desaturation slowed down to 70,42%. | |
| 1959 // | |
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1960 static void calc_dive_interval(void) |
| 368 | 1961 { |
| 1962 overlay unsigned char t; | |
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1963 overlay unsigned char backup_model; |
| 368 | 1964 |
| 1965 //---- Initialize simulation parameters ---------------------------------- | |
| 1966 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
| 1967 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
| 1968 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 1969 ppHe = 0.0; | |
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1970 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 368 | 1971 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 1972 | |
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1973 // Make sure SURFACE_DESAT_FACTOR is applyed: |
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1974 backup_model = char_I_deco_model; |
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1975 char_I_deco_model = 0; |
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1976 |
| 368 | 1977 //---- Perform simulation ------------------------------------------------ |
| 1978 for(t=0; t<char_I_dive_interval; ++t) | |
| 1979 { | |
| 1980 calc_tissue(2); // period = 10min. | |
| 1981 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
| 1982 } | |
| 514 | 1983 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
| 1984 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); | |
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1985 |
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1986 //---- Restore model ----------------------------------------------------- |
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1987 char_I_deco_model = backup_model; |
| 368 | 1988 } |
| 1989 | |
| 1990 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 1991 ////////////////////////////////////////////////////////////////////////////// |
| 1992 ////////////////////////////////// deco_hash ///////////////////////////////// | |
| 1993 ////////////////////////////////////////////////////////////////////////////// | |
| 1994 ////////////////////////////////////////////////////////////////////////////// | |
| 126 | 1995 |
| 184 | 1996 #ifndef CROSS_COMPILE |
| 116 | 1997 void deco_hash(void) |
| 1998 { | |
| 167 | 1999 overlay unsigned char md_i, md_j; // Loop index. |
| 2000 overlay unsigned char md_t; | |
| 2001 overlay unsigned char md_buffer[16]; | |
| 2002 overlay unsigned char md_temp; | |
| 203 | 2003 overlay unsigned short md_pointer; |
| 167 | 2004 |
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2005 RESET_C_STACK |
| 126 | 2006 |
| 2007 // init | |
| 164 | 2008 for(md_i=0;md_i<16;md_i++) |
| 126 | 2009 { |
| 2010 md_state[md_i] = 0; | |
| 164 | 2011 char_O_hash[md_i] = 0; |
| 126 | 2012 } // for md_i 16 |
| 116 | 2013 |
| 126 | 2014 _asm |
| 167 | 2015 movlw 0x01 // md_pi address. |
| 2016 movwf TBLPTRU,0 | |
| 2017 movlw 0x7E | |
| 2018 movwf TBLPTRH,0 | |
| 2019 movlw 0x00 | |
| 2020 movwf TBLPTRL,0 | |
| 126 | 2021 _endasm; |
| 165 | 2022 md_i = 0; |
| 2023 do { | |
| 126 | 2024 _asm |
| 2025 TBLRDPOSTINC | |
| 2026 movff TABLAT,md_temp | |
| 2027 _endasm | |
| 165 | 2028 md_pi_subst[md_i++] = md_temp; |
| 2029 } while( md_i != 0 ); | |
| 2030 | |
| 126 | 2031 _asm |
| 167 | 2032 movlw 0x00 |
| 2033 movwf TBLPTRU,0 | |
| 2034 movlw 0x00 | |
| 2035 movwf TBLPTRH,0 | |
| 2036 movlw 0x00 | |
| 2037 movwf TBLPTRL,0 | |
| 126 | 2038 _endasm |
| 167 | 2039 |
| 126 | 2040 // cycle buffers |
| 2041 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
| 2042 { | |
| 2043 md_t = 0; | |
| 2044 for (md_i=0;md_i<16;md_i++) | |
| 2045 { | |
| 2046 if(md_pointer == 9) | |
| 164 | 2047 md_temp = char_O_hash[md_i]; |
| 126 | 2048 else |
| 2049 { | |
| 2050 _asm | |
| 167 | 2051 TBLRDPOSTINC |
| 2052 movff TABLAT,md_temp | |
| 126 | 2053 _endasm |
| 2054 } // else | |
| 167 | 2055 |
| 2056 md_buffer[md_i] = md_temp; | |
| 186 | 2057 md_state[md_i+16] = md_temp; |
| 2058 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
| 126 | 2059 } // for md_i 16 |
| 2060 | |
| 2061 for (md_i=0;md_i<18;md_i++) | |
| 2062 { | |
| 2063 for (md_j=0;md_j<48;md_j++) | |
| 2064 { | |
| 167 | 2065 md_state[md_j] ^= md_pi_subst[md_t]; |
| 126 | 2066 md_t = md_state[md_j]; |
| 2067 } // for md_j 48 | |
| 2068 md_t = (unsigned char)(md_t+1); | |
| 2069 } // for md_i 18 | |
| 164 | 2070 md_t = char_O_hash[15]; |
| 126 | 2071 |
| 2072 for (md_i=0;md_i<16;md_i++) | |
| 2073 { | |
| 167 | 2074 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
| 164 | 2075 md_t = char_O_hash[md_i]; |
| 126 | 2076 } // for md_i 16 |
| 2077 } // for md_pointer | |
| 116 | 2078 } // void deco_hash(void) |
| 184 | 2079 #endif |
| 116 | 2080 |
| 167 | 2081 ////////////////////////////////////////////////////////////////////////////// |
| 2082 // deco_clear_CNS_fraction | |
| 2083 // | |
| 116 | 2084 // new in v.101 |
| 167 | 2085 // |
| 116 | 2086 void deco_clear_CNS_fraction(void) |
| 2087 { | |
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2088 RESET_C_STACK |
| 237 | 2089 |
| 126 | 2090 CNS_fraction = 0.0; |
| 2091 char_O_CNS_fraction = 0; | |
| 167 | 2092 } |
| 116 | 2093 |
| 167 | 2094 ////////////////////////////////////////////////////////////////////////////// |
| 2095 // deco_calc_CNS_fraction | |
| 2096 // | |
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2097 // Input: char_I_actual_ppO2 : Current condition (in decibars). |
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2098 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. |
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2099 // CNS_fraction : velue before period. |
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2100 // Output: CNS_fraction, char_O_CNS_fraction |
| 167 | 2101 // |
| 116 | 2102 void deco_calc_CNS_fraction(void) |
| 2103 { | |
| 292 | 2104 overlay float time_factor = 1.0f; |
| 126 | 2105 RESET_C_STACK |
| 167 | 2106 |
| 471 | 2107 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
| 237 | 2108 assert( char_I_actual_ppO2 > 15 ); |
| 2109 | |
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2110 if( char_I_step_is_1min == 1 ) |
| 292 | 2111 time_factor = 30.0f; |
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2112 else if( char_I_step_is_1min == 2 ) |
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2113 time_factor = 300.0f; |
| 116 | 2114 |
| 126 | 2115 if (char_I_actual_ppO2 < 50) |
| 292 | 2116 ; // no changes |
| 126 | 2117 else if (char_I_actual_ppO2 < 60) |
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2118 CNS_fraction += time_factor/(-540.0 * char_I_actual_ppO2 + 54000.0); |
| 126 | 2119 else if (char_I_actual_ppO2 < 70) |
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2120 CNS_fraction += time_factor/(-450.0 * char_I_actual_ppO2 + 48600.0); |
| 126 | 2121 else if (char_I_actual_ppO2 < 80) |
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2122 CNS_fraction += time_factor/(-360.0 * char_I_actual_ppO2 + 42300.0); |
| 126 | 2123 else if (char_I_actual_ppO2 < 90) |
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2124 CNS_fraction += time_factor/(-270.0 * char_I_actual_ppO2 + 35100.0); |
| 126 | 2125 else if (char_I_actual_ppO2 < 110) |
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2126 CNS_fraction += time_factor/(-180.0 * char_I_actual_ppO2 + 27000.0); |
| 126 | 2127 else if (char_I_actual_ppO2 < 150) |
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2128 CNS_fraction += time_factor/( -90.0 * char_I_actual_ppO2 + 17100.0); |
| 126 | 2129 else if (char_I_actual_ppO2 < 160) |
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2130 CNS_fraction += time_factor/(-225.0 * char_I_actual_ppO2 + 37350.0); |
| 126 | 2131 else if (char_I_actual_ppO2 < 165) |
| 292 | 2132 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 | 2133 else if (char_I_actual_ppO2 < 170) |
| 292 | 2134 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
| 126 | 2135 else if (char_I_actual_ppO2 < 175) |
| 292 | 2136 CNS_fraction += time_factor*0.00136; |
| 126 | 2137 else if (char_I_actual_ppO2 < 180) |
| 292 | 2138 CNS_fraction += time_factor*0.00180; |
| 126 | 2139 else if (char_I_actual_ppO2 < 185) |
| 292 | 2140 CNS_fraction += time_factor*0.00237; |
| 126 | 2141 else if (char_I_actual_ppO2 < 190) |
| 292 | 2142 CNS_fraction += time_factor*0.00310; |
| 126 | 2143 else if (char_I_actual_ppO2 < 195) |
| 292 | 2144 CNS_fraction += time_factor*0.00401; |
| 126 | 2145 else if (char_I_actual_ppO2 < 200) |
| 292 | 2146 CNS_fraction += time_factor*0.00517; |
| 126 | 2147 else if (char_I_actual_ppO2 < 230) |
| 292 | 2148 CNS_fraction += time_factor*0.0209; |
| 126 | 2149 else |
| 292 | 2150 CNS_fraction += time_factor*0.0482; // value for 2.5 |
| 116 | 2151 |
| 514 | 2152 if( CNS_fraction > 2.5 ) |
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2153 CNS_fraction = 2.55; |
| 514 | 2154 if( CNS_fraction < 0.0 ) |
| 126 | 2155 CNS_fraction = 0.0; |
| 2156 | |
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2157 char_O_CNS_fraction = (unsigned char)(100.0 * CNS_fraction + 0.5); |
| 167 | 2158 } |
| 116 | 2159 |
| 167 | 2160 ////////////////////////////////////////////////////////////////////////////// |
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2161 // deco_calc_CNS_planning |
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2162 // |
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2163 // Compute CNS during predicted ascent. |
| 488 | 2164 // |
| 2165 // Note: Needs a call to deco_push_tissues_to_vault(), | |
| 2166 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
| 2167 // | |
| 2168 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
| 2169 // Output: CNS_fraction, char_O_CNS_fraction | |
| 2170 // | |
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2171 void deco_calc_CNS_planning(void) |
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2172 { |
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2173 overlay unsigned char backup_gas_last_depth; |
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2174 overlay unsigned char backup_gas_last_used; |
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2175 overlay unsigned short backup_gas_delay; |
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2176 overlay unsigned short backup_dive_mins; |
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2177 overlay unsigned char backup_actual_ppO2; |
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2178 |
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2179 RESET_C_STACK |
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2180 |
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2181 // Backup state machine |
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2182 backup_gas_last_depth = sim_gas_last_depth; |
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2183 backup_gas_last_used = sim_gas_last_used; |
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2184 backup_gas_delay = sim_gas_delay; |
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2185 backup_dive_mins = sim_dive_mins; |
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2186 backup_actual_ppO2 = char_I_actual_ppO2; |
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2187 |
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2188 // Uses 1min CNS period: |
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2189 char_I_step_is_1min = 1; |
|
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|
2190 |
|
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2191 //---- Retrieve bottom Gas used, and set variables. |
|
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2192 sim_gas_last_used = char_I_first_gas; |
|
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2193 sim_gas_last_depth = 0; // Surface gas marker. |
|
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2194 gas_switch_set(); // Sets initial calc_N2/He_ratio |
|
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2195 |
|
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2196 //---- CCR mode : do the full TTS at once -------------------------------- |
|
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2197 if( char_I_const_ppO2 != 0 ) |
|
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2198 { |
|
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2199 overlay unsigned short t; // Needs 16bits here ! |
|
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2200 char_I_actual_ppO2 = char_I_const_ppO2; |
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2201 for(t=0; t<int_O_ascenttime; ++t) |
|
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2202 deco_calc_CNS_fraction(); |
|
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2203 } |
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2204 else //---- OC mode : have to follow all gas switches... ----------------- |
|
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2205 { |
|
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2206 overlay unsigned char i = 0; // Decostop loop counter |
|
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2207 overlay float actual_ppO2; |
|
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2208 overlay unsigned char time, t; |
|
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2209 |
|
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2210 //---- Ascent to surface delay |
|
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2211 // NOTE: count as if time is spent with bottom pressure, |
|
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2212 // AND the bottom gas |
|
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2213 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) |
|
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2214 * (1.0 - calc_N2_ratio - calc_He_ratio); |
|
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2215 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
|
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2216 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
|
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2217 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
|
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2218 |
|
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|
2219 // Ascent time (rounded up): |
|
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2220 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); |
|
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2221 |
|
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2222 for(t=0; t<time; ++t) |
|
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2223 { |
|
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|
2224 deco_calc_CNS_fraction(); |
|
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|
2225 sim_dive_mins++; |
|
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2226 } |
|
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2227 |
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|
2228 //---- Do all further stops |
|
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|
2229 for(i=0; i<NUM_STOPS; ++i) |
|
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2230 { |
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2231 //---- Get next stop |
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|
2232 time = char_O_deco_time[i]; |
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2233 temp_depth_limit = char_O_deco_depth[i] & 0x7F; |
|
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2234 if( time == 0 ) break; // End of table: done. |
|
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2235 |
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2236 //---- Gas Switch ? |
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2237 if( char_O_deco_depth[i] & 0x80 ) |
|
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2238 if( gas_switch_deepest() ) |
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2239 gas_switch_set(); |
|
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2240 |
|
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2241 //---- Convert Depth and N2_ratio to ppO2 |
|
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2242 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) |
|
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2243 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2244 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2245 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2246 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2247 |
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2248 //---- Apply the stop |
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2249 for(t=0; t<time; ++t) |
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2250 { |
|
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2251 deco_calc_CNS_fraction(); |
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2252 sim_dive_mins++; |
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2253 } |
|
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2254 } |
| 488 | 2255 } |
| 2256 | |
| 2257 // Back to normal mode... | |
| 2258 char_I_step_is_1min = 0; | |
|
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2259 sim_gas_last_depth = backup_gas_last_depth; |
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2260 sim_gas_last_used = backup_gas_last_used; |
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2261 sim_gas_delay = backup_gas_delay; |
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2262 sim_dive_mins = backup_dive_mins; |
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2263 char_I_actual_ppO2 = backup_actual_ppO2; |
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2264 } |
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2265 |
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2266 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 2267 // deco_calc_CNS_decrease_15min |
| 2268 // | |
| 116 | 2269 // new in v.101 |
| 167 | 2270 // |
| 116 | 2271 // calculates the half time of 90 minutes in 6 steps of 15 min |
| 200 | 2272 // (Used in sleepmode, for low battery mode). |
| 167 | 2273 // |
| 116 | 2274 // Output: char_O_CNS_fraction |
| 2275 // Uses and Updates: CNS_fraction | |
| 167 | 2276 // |
| 116 | 2277 void deco_calc_CNS_decrease_15min(void) |
| 2278 { | |
| 237 | 2279 RESET_C_STACK |
| 514 | 2280 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
| 237 | 2281 |
| 126 | 2282 CNS_fraction = 0.890899 * CNS_fraction; |
| 514 | 2283 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
| 167 | 2284 } |
| 116 | 2285 |
| 167 | 2286 ////////////////////////////////////////////////////////////////////////////// |
| 2287 // deco_calc_percentage | |
| 2288 // | |
| 116 | 2289 // new in v.101 |
| 167 | 2290 // |
| 116 | 2291 // calculates int_I_temp * char_I_temp / 100 |
| 2292 // output is int_I_temp | |
| 200 | 2293 // |
| 2294 // Used to compute NoFly remaining time. | |
|
222
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2295 // |
| 116 | 2296 void deco_calc_percentage(void) |
| 2297 { | |
|
122
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2298 RESET_C_STACK |
|
222
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2299 |
| 237 | 2300 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
| 2301 assert( 0 <= int_I_temp && int_I_temp < 2880 ); // Less than 48h... | |
| 2302 | |
|
222
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2303 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
| 237 | 2304 |
| 302 | 2305 assert( int_I_temp < 2880 ); // Less than 48h... |
|
222
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2306 } |
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2307 |
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2308 |
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2309 ////////////////////////////////////////////////////////////////////////////// |
|
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2310 // deco_gas_volumes |
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2311 // |
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2312 // new in v.111 |
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2313 // |
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2314 // calculates volumes for each gas. |
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2315 // |
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2316 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
|
240
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2317 // Gas list. |
|
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2318 // char_I_first_gas is the bottom gas. |
|
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2319 // decoplan (char_O_deco_depth, char_O_deco_time). |
|
234
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2320 // CF#54 == TRUE if shallowest stop first. |
|
478
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2321 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min. |
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2322 // CF#57 == deco liters/minutes (5 .. 50) or bar/min. |
| 224 | 2323 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
|
222
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2324 // |
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2325 void deco_gas_volumes(void) |
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2326 { |
| 338 | 2327 overlay float volumes[NUM_GAS]; |
|
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2328 overlay float bottom_usage, deco_usage; |
|
234
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2329 overlay unsigned char i, deepest_first; |
| 241 | 2330 overlay unsigned char gas; |
|
222
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2331 RESET_C_STACK |
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2332 |
|
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2333 //---- initialize with bottom consumption -------------------------------- |
| 338 | 2334 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
|
240
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2335 volumes[i] = 0.0; |
|
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2336 |
| 338 | 2337 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
| 241 | 2338 gas = char_I_first_gas - 1; |
| 2339 | |
|
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2340 bottom_usage = (float) read_custom_function(56); |
| 265 | 2341 if( bottom_usage > 0.0 ) |
| 2342 volumes[gas] | |
| 2343 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
| 2344 * char_I_bottom_time // in minutes. | |
| 2345 * bottom_usage; // In liter/minutes. | |
| 2346 else | |
| 2347 volumes[gas] = 65535.0; | |
|
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2348 |
|
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2349 //---- Ascent usage ------------------------------------------------------ |
|
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2350 |
|
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2351 deepest_first = read_custom_function(54) == 0; |
|
511
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2352 deco_usage = (float) read_custom_function(57); // In liter/minutes. |
|
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2353 |
| 224 | 2354 // Usage up to the first stop: |
| 2355 // - computed at MAX depth (easier, safer), | |
|
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2356 // - with an ascent speed of 10m/min. |
| 224 | 2357 // - with ascent litter / minutes. |
|
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2358 // - still using bottom gas: |
|
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2359 if( deco_usage > 0.0 ) |
| 265 | 2360 volumes[gas] |
| 2361 += (char_I_bottom_depth*0.1 + 1.0) // Depth -> bar | |
| 2362 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 // ascent time (min) | |
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2363 * deco_usage; // Consumption ( xxx / min @ 1 bar) |
| 265 | 2364 else |
| 2365 volumes[gas] = 65535.0; | |
|
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2366 |
| 338 | 2367 for(i=0; i<NUM_STOPS; ++i) |
|
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2368 { |
| 241 | 2369 overlay unsigned char j; |
|
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2370 overlay unsigned char depth, time, ascent; |
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2371 |
|
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2372 // Manage stops in reverse order (CF#54) |
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2373 if( deepest_first ) |
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2374 { |
| 241 | 2375 time = char_O_deco_time[i]; |
|
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2376 if( time == 0 ) break; // End of table: done. |
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2377 |
|
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2378 ascent = depth = char_O_deco_depth[i] & 0x7F; |
|
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2379 if( i < 31 ) |
|
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2380 ascent -= char_O_deco_depth[i+1] & 0x7F; |
|
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2381 } |
|
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2382 else |
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2383 { |
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2384 time = char_O_deco_time[31-i]; |
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2385 if( time == 0 ) continue; // not yet: still searh table. |
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2386 |
|
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2387 ascent = depth = char_O_deco_depth[31-i] & 0x7F; |
|
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2388 if( i < 31 ) |
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2389 ascent -= char_O_deco_depth[30-i] & 0x7F; |
|
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2390 } |
|
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2391 |
|
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2392 // Gas switch depth ? |
| 338 | 2393 for(j=0; j<NUM_GAS; ++j) |
|
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2394 { |
|
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2395 if( depth <= char_I_deco_gas_change[j] ) |
| 241 | 2396 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
| 224 | 2397 gas = j; |
|
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2398 } |
|
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2399 |
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2400 // usage during stop: |
| 224 | 2401 // Note: because first gas is not in there, increment gas+1 |
|
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2402 if( deco_usage > 0.0 ) |
| 265 | 2403 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
| 2404 * time // in minutes. | |
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2405 * deco_usage // in xxx / min @ 1bar. |
| 265 | 2406 // Plus usage during ascent to the next stop, at 10m/min. |
| 2407 + (depth*0.1 + 1.0) | |
|
275
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2408 * ascent*0.1 // metre --> min |
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2409 * deco_usage; |
| 265 | 2410 else |
| 2411 volumes[gas] = 65535.0; | |
|
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2412 } |
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2413 |
|
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2414 //---- convert results for the ASM interface ----------------------------- |
| 338 | 2415 for(i=0; i<NUM_GAS; ++i) |
|
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2416 if( volumes[i] > 65534.0 ) |
| 224 | 2417 int_O_gas_volumes[i] = 65535; |
|
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2418 else |
|
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2419 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); |
| 116 | 2420 } |
| 2421 | |
| 167 | 2422 ////////////////////////////////////////////////////////////////////////////// |
| 2423 | |
| 116 | 2424 void deco_push_tissues_to_vault(void) |
| 2425 { | |
| 167 | 2426 overlay unsigned char x; |
|
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2427 RESET_C_STACK |
| 167 | 2428 |
| 116 | 2429 cns_vault = CNS_fraction; |
| 339 | 2430 for (x=0;x<NUM_COMP;x++) |
| 2431 { | |
| 2432 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
| 2433 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
| 2434 } | |
| 116 | 2435 } |
| 167 | 2436 |
| 116 | 2437 void deco_pull_tissues_from_vault(void) |
| 2438 { | |
| 167 | 2439 overlay unsigned char x; |
|
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2440 RESET_C_STACK |
| 167 | 2441 |
| 339 | 2442 for (x=0; x<NUM_COMP; x++) |
| 2443 { | |
| 2444 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
| 2445 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
| 2446 } | |
| 292 | 2447 |
| 2448 // Restore both CNS variable, too. | |
| 2449 CNS_fraction = cns_vault; | |
| 514 | 2450 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
| 116 | 2451 } |
| 2452 | |
| 167 | 2453 ////////////////////////////////////////////////////////////////////////////// |
| 2454 // | |
| 184 | 2455 #ifndef CROSS_COMPILE |
| 2456 void main() {} | |
| 2457 #endif |