Mercurial > public > hwos_code
annotate src/p2_deco.c @ 121:d519e24ef990
minor
| author | heinrichsweikamp |
|---|---|
| date | Fri, 27 Jun 2014 16:15:07 +0200 |
| parents | 72259a79eac2 |
| children | d076e9c02438 |
| rev | line source |
|---|---|
| 0 | 1 // ************************************************************** |
| 2 // p2_deco.c | |
| 3 // | |
| 4 // Created on: 12.05.2009 | |
| 5 // Author: chsw | |
| 6 // | |
| 7 // ************************************************************** | |
| 8 | |
| 9 ////////////////////////////////////////////////////////////////////////////// | |
| 10 // OSTC - diving computer code | |
| 11 // Copyright (C) 2011 HeinrichsWeikamp GbR | |
| 12 // | |
| 13 // This program is free software: you can redistribute it and/or modify | |
| 14 // it under the terms of the GNU General Public License as published by | |
| 15 // the Free Software Foundation, either version 3 of the License, or | |
| 16 // (at your option) any later version. | |
| 17 // | |
| 18 // This program is distributed in the hope that it will be useful, | |
| 19 // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 20 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 21 // GNU General Public License for more details. | |
| 22 // | |
| 23 // You should have received a copy of the GNU General Public License | |
| 24 // along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 25 // | |
| 26 ////////////////////////////////////////////////////////////////////////////// | |
| 27 | |
| 28 // ***************************** | |
| 29 // ** I N T R O D U C T I O N ** | |
| 30 // ***************************** | |
| 31 // | |
| 32 // OSTC | |
| 33 // | |
| 34 // code: | |
| 35 // p2_deco_main_c_v101.c | |
| 36 // part2 of the OSTC code | |
| 37 // code with constant O2 partial pressure routines | |
| 38 // under construction !! | |
| 39 // | |
| 40 // summary: | |
| 41 // decompression routines | |
| 42 // for the OSTC experimental project | |
| 43 // written by Christian Weikamp | |
| 44 // last revision __________ | |
| 45 // comments added _________ | |
| 46 // | |
| 47 // additional files: | |
| 48 // p2_tables_v100.romdata (other files) | |
| 49 // 18f4685_ostc_v100.lkr (linker script) | |
| 50 // | |
| 51 // history: | |
| 52 // 01/03/08 v100: first release candidate | |
| 53 // 03/13/08 v101: start of programming ppO2 code | |
| 54 // 03/13/25 v101a: backup of interrim version with ppO2 calculation | |
| 55 // 03/13/25 v101: open circuit gas change during deco | |
| 56 // 03/13/25 v101: CNS_fraction calculation | |
| 57 // 03/13/26 v101: optimization of tissue calc routines | |
| 58 // 07/xx/08 v102a: debug of bottom time routine | |
| 59 // 09/xx/08 v102d: Gradient Factor Model implemenation | |
| 60 // 10/10/08 v104: renamed to build v103 for v118 stable | |
| 61 // 10/14/08 v104: integration of char_I_depth_last_deco for Gradient Model | |
| 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) | |
| 66 // 2011/01/20: [jDG] Create a common file included in ASM and C code. | |
| 67 // 2011/01/24: [jDG] Make ascenttime an short. No more overflow! | |
| 68 // 2011/01/25: [jDG] Fusion deco array for both models. | |
| 69 // 2011/01/25: [jDG] Use CF(54) to reverse deco order. | |
| 70 // 2011/02/11: [jDG] Reworked gradient-factor implementation. | |
| 71 // 2011/02/15: [jDG] Fixed inconsistencies introduced by gas switch delays. | |
| 72 // 2011/03/21: [jDG] Added gas consumption (CF56 & CF57) evaluation for OCR mode. | |
| 73 // 2011/04/15: [jDG] Store low_depth in 32bits (w/o rounding), for a better stability. | |
| 74 // 2011/04/25: [jDG] Added 1mn mode for CNS calculation, to allow it for decoplanning. | |
| 75 // 2011/04/27: [jDG] Fixed char_O_gradient_factor calculation when model uses gradient-factor. | |
| 76 // 2011/05/02: [jDG] Added "Future TTS" function (CF58). | |
| 77 // 2011/05/17: [jDG] Various cleanups. | |
| 78 // 2011/08/08: [jDG] Computes CNS during deco planning ascent. | |
| 79 // 2011/11/24: [jDG] Slightly faster and better NDL computation. | |
| 80 // 2011/12/17: [mH] Remove of the useless debug stuff | |
| 81 // 2012/02/24: [jDG] Remove missed stop bug. | |
| 82 // 2012/02/25: [jDG] Looking for a more stable LOW grad factor reference. | |
| 83 // 2012/09/10: [mH] Fill char_O_deco_time_for_log for logbook write | |
| 84 // 2012/10/05: [jDG] Better deco_gas_volumes accuracy (average depth, switch between stop). | |
| 85 // 2013/03/05: [jDG] Should vault low_depth too. | |
| 86 // 2013/03/05: [jDG] Wrobell remark: ascent_to_first_stop works better with finer steps (2sec). | |
|
33
5d4a4fb0e8a6
Bugfix: NOAA tables for CNS are in ATA, not bar
heinrichsweikamp
parents:
0
diff
changeset
|
87 // 2013/05/08: [jDG] A. Salm remark: NOAA tables for CNS are in ATA, not bar. |
|
115
72259a79eac2
FIX: Gas volume computation when using several travel mix.
heinrichsweikamp
parents:
114
diff
changeset
|
88 // 2013/12/21: [jDG] Fix CNS calculation in decoplan w/o marked gas switch |
|
72259a79eac2
FIX: Gas volume computation when using several travel mix.
heinrichsweikamp
parents:
114
diff
changeset
|
89 // 2014/06/16: [jDG] Fix Helium diluant. Fix volumes with many travel mix. |
| 0 | 90 // |
| 91 // TODO: | |
| 92 // | |
| 93 // Literature: | |
| 94 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; | |
| 95 // 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 | |
| 96 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
| 97 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
| 98 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
| 99 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
| 100 // | |
| 101 // | |
| 102 | |
| 103 // ********************* | |
| 104 // ** I N C L U D E S ** | |
| 105 // ********************* | |
| 106 #include <math.h> | |
| 107 | |
| 108 // *********************************************** | |
| 109 // ** V A R I A B L E S D E F I N I T I O N S ** | |
| 110 // *********************************************** | |
| 111 | |
| 112 #include "p2_definitions.h" | |
| 113 #define TEST_MAIN | |
| 114 #include "shared_definitions.h" | |
| 115 | |
| 116 // Water vapour partial pressure in the lumb. | |
| 117 #define ppWater 0.0627 | |
| 118 #define METER_TO_BAR 0.09985 | |
| 119 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
| 120 | |
| 121 // Surface security factor | |
| 122 #define SURFACE_DESAT_FACTOR 0.7042 | |
| 123 | |
| 124 // ************************* | |
| 125 // ** P R O T O T Y P E S ** | |
| 126 // ************************* | |
| 127 | |
| 128 static void calc_hauptroutine(void); | |
| 129 static void calc_nullzeit(void); | |
| 130 | |
| 131 static void calc_tissue(PARAMETER unsigned char period); | |
| 132 static void calc_limit(void); | |
| 133 | |
| 134 static void clear_tissue(void); | |
| 135 static void calc_ascenttime(void); | |
| 136 static void update_startvalues(void); | |
| 137 static void clear_deco_table(void); | |
| 138 static unsigned char update_deco_table(void); | |
| 139 | |
| 140 static void sim_tissue(PARAMETER unsigned char period); | |
| 141 static void sim_limit(PARAMETER float GF_current); | |
| 142 static void sim_extra_time(void); | |
| 143 static void calc_dive_interval(void); | |
| 144 | |
| 145 static void calc_gradient_factor(void); | |
| 146 static void calc_wo_deco_step_1_min(void); | |
| 147 | |
| 148 static void calc_hauptroutine_data_input(void); | |
| 149 static void calc_hauptroutine_update_tissues(void); | |
| 150 static void calc_hauptroutine_calc_deco(void); | |
| 151 static void sim_ascent_to_first_stop(void); | |
| 152 | |
| 153 static unsigned char gas_switch_deepest(void); | |
| 154 static void gas_switch_set(void); | |
| 155 | |
| 156 static unsigned char calc_nextdecodepth(void); | |
| 157 | |
| 158 //---- Bank 5 parameters ----------------------------------------------------- | |
| 159 #ifndef UNIX | |
| 160 # pragma udata bank5=0x500 | |
| 161 #endif | |
| 162 | |
| 163 static float GF_low; | |
| 164 static float GF_high; | |
| 165 static float GF_delta; | |
| 166 static float locked_GF_step; // GF_delta / low_depth | |
| 167 | |
| 168 static unsigned char temp_depth_limit; | |
| 169 static unsigned char low_depth; // Depth of deepest stop | |
| 170 | |
| 171 // Simulation context: used to predict ascent. | |
| 172 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 173 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 174 | |
| 175 // Real context: what we are doing now. | |
| 176 static float calc_lead_tissue_limit; // | |
| 177 | |
| 178 static unsigned char internal_deco_time[NUM_STOPS]; | |
| 179 static unsigned char internal_deco_depth[NUM_STOPS]; | |
| 180 | |
| 181 static float cns_vault; | |
| 182 static float low_depth_vault; | |
| 183 static float pres_tissue_N2_vault[NUM_COMP]; | |
| 184 static float pres_tissue_He_vault[NUM_COMP]; | |
| 185 | |
| 186 //---- Bank 6 parameters ----------------------------------------------------- | |
| 187 #ifndef UNIX | |
| 188 # pragma udata bank6=0x600 | |
| 189 #endif | |
| 190 | |
| 191 static unsigned char ci; | |
| 192 static float pres_respiration; | |
| 193 static float pres_surface; | |
| 194 static float temp_deco; | |
| 195 static float ppN2; | |
| 196 static float ppHe; | |
| 197 static float temp_tissue; | |
| 198 static float N2_ratio; // Breathed gas nitrogen ratio. | |
| 199 static float He_ratio; // Breathed gas helium ratio. | |
| 200 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
| 201 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
| 202 static float var_He_a; // Bühlmann a, for current He tissue. | |
| 203 static float var_He_b; // Bühlmann b, for current He tissue. | |
| 204 static float var_N2_e; // Exposition, for current N2 tissue. | |
| 205 static float var_He_e; // Exposition, for current He tissue. | |
| 206 static float var_N2_ht; // Half-time for current N2 tissue. | |
| 207 static float var_He_ht; // Half-time for current N2 tissue. | |
| 208 | |
| 209 static float pres_diluent; // new in v.101 | |
| 210 static float const_ppO2; // new in v.101 | |
| 211 | |
| 212 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. | |
| 213 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
| 214 static unsigned short sim_dive_mins; // Simulated dive time. | |
| 215 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. | |
| 216 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
| 217 static float CNS_fraction; // new in v.101 | |
| 218 static float float_saturation_multiplier; // new in v.101 | |
| 219 static float float_desaturation_multiplier; // new in v.101 | |
| 220 static float float_deco_distance; // new in v.101 | |
| 221 | |
| 222 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 | |
| 111 | 223 static unsigned char internal_deco_gas [NUM_STOPS]; |
| 0 | 224 |
| 225 //---- Bank 7 parameters ----------------------------------------------------- | |
| 226 #ifndef UNIX | |
| 227 # pragma udata bank7=0x700 | |
| 228 #endif | |
| 229 | |
| 230 float pres_tissue_N2[NUM_COMP]; | |
| 231 float pres_tissue_He[NUM_COMP]; | |
| 232 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. | |
| 233 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
| 234 | |
| 235 //---- Bank 8 parameters ----------------------------------------------------- | |
| 236 #ifndef UNIX | |
| 237 # pragma udata overlay bank8=0x800 | |
| 238 static char md_pi_subst[256]; | |
| 239 # define C_STACK md_pi_subst // Overlay C-code data stack here, too. | |
| 240 #endif | |
| 241 | |
| 242 // Back to bank6 for further tmp data | |
| 243 #ifndef UNIX | |
| 244 # pragma udata bank6 | |
| 245 #endif | |
| 246 | |
| 247 ////////////////////////////////////////////////////////////////////////////// | |
| 248 ////////////////////////////////////////////////////////////////////////////// | |
| 249 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 250 ////////////////////////////////////////////////////////////////////////////// | |
| 251 ////////////////////////////////////////////////////////////////////////////// | |
| 252 // | |
| 253 // End of PROM code is 17F00, So push tables on PROM top... | |
| 254 // | |
| 255 #ifndef UNIX | |
| 256 # pragma romdata buhlmann_tables = 0x1DD00 // Needs to be in UPPER bank. | |
| 257 #endif | |
| 258 | |
| 259 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) | |
| 260 | |
| 261 ////////////////////////////////////////////////////////////////////////////// | |
| 262 ////////////////////////////////////////////////////////////////////////////// | |
| 263 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 264 ////////////////////////////////////////////////////////////////////////////// | |
| 265 ////////////////////////////////////////////////////////////////////////////// | |
| 266 // | |
| 267 // all new in v.102 | |
| 268 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 269 #ifndef UNIX | |
| 270 # pragma code p2_deco = 0x0C000 | |
| 271 #endif | |
| 272 | |
| 273 ////////////////////////////////////////////////////////////////////////////// | |
| 274 ////////////////////////////////////////////////////////////////////////////// | |
| 275 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 276 ////////////////////////////////////////////////////////////////////////////// | |
| 277 ////////////////////////////////////////////////////////////////////////////// | |
| 278 | |
| 279 ////////////////////////////////////////////////////////////////////////////// | |
| 280 // Bump to blue-screen when an assert is wrong | |
| 281 #ifdef __DEBUG | |
| 282 void assert_failed(PARAMETER short int line) | |
| 283 { | |
| 284 } | |
| 285 #endif | |
| 286 | |
| 287 ////////////////////////////////////////////////////////////////////////////// | |
| 288 // When calling C code from ASM context, the data stack pointer and | |
| 289 // frames should be reset. Bank8 is used by stack | |
| 290 | |
| 291 #ifdef CROSS_COMPILE | |
| 292 # define RESET_C_STACK | |
| 293 #else | |
| 294 # ifdef __DEBUG | |
| 295 # define RESET_C_STACK fillDataStack(); | |
| 296 void fillDataStack(void) | |
| 297 { | |
| 298 _asm | |
| 299 LFSR 1,C_STACK | |
| 300 MOVLW 0xCC | |
| 301 loop: MOVWF POSTINC1,0 | |
| 302 TSTFSZ FSR1L,0 | |
| 303 BRA loop | |
| 304 | |
| 305 LFSR 1,C_STACK | |
| 306 LFSR 2,C_STACK | |
| 307 _endasm | |
| 308 } | |
| 309 # else | |
| 310 # define RESET_C_STACK \ | |
| 311 _asm \ | |
| 312 LFSR 1, C_STACK \ | |
| 313 LFSR 2, C_STACK \ | |
| 314 _endasm | |
| 315 # endif | |
| 316 #endif | |
| 317 | |
| 318 ////////////////////////////////////////////////////////////////////////////// | |
| 319 // Fast subroutine to read timer 5. | |
| 320 // Note: result is in 1/32 of msecs (30,51757813µs/bit to be precise) | |
| 321 static unsigned short tmr5(void) | |
| 322 { | |
| 323 #ifndef CROSS_COMPILE | |
| 324 _asm | |
| 325 movff 0xf7c,PRODL // TMR5L | |
| 326 movff 0xf7d,PRODH // TMR5H | |
| 327 _endasm // result in PRODH:PRODL. | |
| 328 #else | |
| 329 return 0; | |
| 330 #endif | |
| 331 } | |
| 332 | |
| 333 | |
| 334 ////////////////////////////////////////////////////////////////////////////// | |
| 335 // read buhlmann tables A and B for compatriment ci | |
| 336 // | |
| 337 static void read_buhlmann_coefficients(void) | |
| 338 { | |
| 339 #ifndef CROSS_COMPILE | |
| 340 // Note: we don't use far rom pointer, because the | |
| 341 // 24 bits is too complex, hence we have to set | |
| 342 // the UPPER page ourself... | |
| 343 // --> Set zero if tables are moved to lower pages ! | |
| 344 _asm | |
| 345 movlw 1 | |
| 346 movwf TBLPTRU,0 | |
| 347 _endasm | |
| 348 #endif | |
| 349 | |
| 350 assert( ci < NUM_COMP ); | |
| 351 | |
| 352 // Use an interleaved array (AoS) to access coefficients with a | |
| 353 // single addressing. | |
| 354 { | |
| 355 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
| 356 var_N2_a = *ptr++; | |
| 357 var_N2_b = *ptr++; | |
| 358 var_He_a = *ptr++; | |
| 359 var_He_b = *ptr++; | |
| 360 } | |
| 361 } | |
| 362 | |
| 363 ////////////////////////////////////////////////////////////////////////////// | |
| 364 // read buhlmann tables for compatriment ci | |
| 365 // If period == 0 : 2sec interval | |
| 366 // 1 : 1 min interval | |
| 367 // 2 : 10 min interval. | |
| 368 static void read_buhlmann_times(PARAMETER char period) | |
| 369 { | |
| 370 #ifndef CROSS_COMPILE | |
| 371 // Note: we don't use far rom pointer, because the | |
| 372 // 24 bits is to complex, hence we have to set | |
| 373 // the UPPER page ourself... | |
| 374 // --> Set zero if tables are moved to lower pages ! | |
| 375 _asm | |
| 376 movlw 1 | |
| 377 movwf TBLPTRU,0 | |
| 378 _endasm | |
| 379 #endif | |
| 380 | |
| 381 assert( ci < NUM_COMP ); | |
| 382 | |
| 383 // Integration intervals. | |
| 384 switch(period) | |
| 385 { | |
| 386 case 0: //---- 2 sec ----------------------------------------------------- | |
| 387 { | |
| 388 overlay rom const float* ptr = &e2secs[2*ci]; | |
| 389 var_N2_e = *ptr++; | |
| 390 var_He_e = *ptr++; | |
| 391 } | |
| 392 break; | |
| 393 | |
| 394 case 1: //---- 1 min ----------------------------------------------------- | |
| 395 { | |
| 396 overlay rom const float* ptr = &e1min[2*ci]; | |
| 397 var_N2_e = *ptr++; | |
| 398 var_He_e = *ptr++; | |
| 399 } | |
| 400 break; | |
| 401 | |
| 402 case 2: //---- 10 min ---------------------------------------------------- | |
| 403 { | |
| 404 overlay rom const float* ptr = &e10min[2*ci]; | |
| 405 var_N2_e = *ptr++; | |
| 406 var_He_e = *ptr++; | |
| 407 } | |
| 408 break; | |
| 409 | |
| 410 default: | |
| 411 assert(0); // Never go there... | |
| 412 } | |
| 413 } | |
| 414 | |
| 415 ////////////////////////////////////////////////////////////////////////////// | |
| 416 // read buhlmann tables for compatriment ci | |
| 417 // | |
| 418 static void read_buhlmann_ht(void) | |
| 419 { | |
| 420 | |
| 421 #ifndef CROSS_COMPILE | |
| 422 // Note: we don't use far rom pointer, because the | |
| 423 // 24 bits is to complex, hence we have to set | |
| 424 // the UPPER page ourself... | |
| 425 // --> Set zero if tables are moved to lower pages ! | |
| 426 _asm | |
| 427 movlw 1 | |
| 428 movwf TBLPTRU,0 | |
| 429 _endasm | |
| 430 #endif | |
| 431 | |
| 432 assert( ci < NUM_COMP ); | |
| 433 { | |
| 434 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
| 435 var_N2_ht = *ptr++; | |
| 436 var_He_ht = *ptr++; | |
| 437 } | |
| 438 | |
| 439 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
| 440 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
| 441 } | |
| 442 | |
| 443 ////////////////////////////////////////////////////////////////////////////// | |
| 444 // calc_nextdecodepth | |
| 445 // | |
| 446 // new in v.102 | |
| 447 // | |
| 448 // INPUT, changing during dive: | |
| 449 // temp_deco | |
| 450 // low_depth | |
| 451 // | |
| 452 // INPUT, fixed during dive: | |
| 453 // pres_surface | |
| 454 // GF_delta | |
| 455 // GF_high | |
| 456 // GF_low | |
| 457 // char_I_depth_last_deco | |
| 458 // float_deco_distance | |
| 459 // | |
| 460 // RETURN TRUE iff a stop is needed. | |
| 461 // | |
| 462 // OUTPUT | |
| 463 // locked_GF_step | |
| 464 // temp_depth_limt | |
| 465 // low_depth | |
| 466 // | |
| 467 static unsigned char calc_nextdecodepth(void) | |
| 468 { | |
| 469 //--- Max ascent speed --------------------------------------------------- | |
| 470 // Recompute leading gas limit, at current depth: | |
| 471 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; | |
| 472 | |
| 473 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 474 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; | |
| 475 | |
| 476 // Do we need to stop at current depth ? | |
| 477 overlay unsigned char need_stop = 0; | |
| 478 | |
| 479 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 480 | |
| 481 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ | |
| 482 if( char_I_deco_model != 0 ) | |
| 483 { | |
| 484 overlay unsigned char first_stop = 0; | |
| 485 overlay float p; | |
| 486 | |
| 487 sim_limit( GF_low ); | |
| 488 p = sim_lead_tissue_limit - pres_surface; | |
| 489 if( p <= 0.0f ) | |
| 490 goto no_deco_stop; // We can surface directly... | |
| 491 | |
| 492 p *= BAR_TO_METER; | |
| 493 if( p < min_depth ) | |
| 494 goto no_deco_stop; // First stop is higher than 1' ascent. | |
| 495 | |
| 496 first_stop = 3 * (short)(0.99999 + p*0.333333); | |
| 497 assert( first_stop < 128 ); | |
| 498 | |
| 499 // Apply correction for the shallowest stop. | |
| 500 if( first_stop == 3 ) // new in v104 | |
| 501 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 502 | |
| 503 // Store the deepest point needing a deco stop as the LOW reference for GF. | |
| 504 // NOTE: following stops will be validated using this LOW-HIGH gf scale, | |
| 505 // so if we want to keep coherency, we should not validate this stop | |
| 506 // yet, but apply the search to it, as for all the following stops afterward. | |
| 507 if( first_stop > low_depth ) | |
| 508 { | |
| 509 low_depth = first_stop; | |
| 510 locked_GF_step = GF_delta / first_stop; | |
| 511 } | |
| 512 | |
| 513 // We have a stop candidate. | |
| 514 // But maybe ascending to the next stop will diminish the constraint, | |
| 515 // because the GF might decrease more than the preassure gradient... | |
| 516 while(first_stop > 0) | |
| 517 { | |
| 518 overlay unsigned char next_stop; // Next depth (0..90m) | |
| 519 overlay float pres_stop; // Next pressure (bar) | |
| 520 | |
| 521 // Check max speed, or reaching surface. | |
| 522 if( first_stop <= min_depth ) | |
| 523 goto no_deco_stop; | |
| 524 | |
| 525 if( first_stop <= char_I_depth_last_deco ) // new in v104 | |
| 526 next_stop = 0; | |
| 527 else if( first_stop == 6 ) | |
| 528 next_stop = char_I_depth_last_deco; | |
| 529 else | |
| 530 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 531 | |
| 532 // Just a check we are indeed above LOW ref. | |
| 533 assert( next_stop < low_depth ); | |
| 534 | |
| 535 // Total preassure at the new stop candidate: | |
| 536 pres_stop = next_stop * METER_TO_BAR | |
| 537 + pres_surface; | |
| 538 | |
| 539 // Keep GF_low until a first stop depth is found: | |
| 540 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 541 | |
| 542 // Check upper limit (lowest pressure tolerated): | |
| 543 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 544 goto deco_stop_found; | |
| 545 | |
| 546 // Else, validate that stop and loop... | |
| 547 first_stop = next_stop; | |
| 548 } | |
| 549 assert( first_stop == 0 ); | |
| 550 | |
| 551 no_deco_stop: | |
| 552 temp_depth_limit = min_depth; | |
| 553 goto done; | |
| 554 | |
| 555 // next stop is the last validated depth found, aka first_stop | |
| 556 deco_stop_found: | |
| 557 need_stop = 1; // Hit. | |
| 558 temp_depth_limit = first_stop; // Stop depth, in meter. | |
| 559 | |
| 560 done: | |
| 561 ; | |
| 562 } | |
| 563 else //---- ZH-L16 model ------------------------------------------------- | |
| 564 { | |
| 565 overlay float pres_gradient; | |
| 566 | |
| 567 // Original model | |
| 568 // optimized in v.101 | |
| 569 // char_I_depth_last_deco included in v.101 | |
| 570 | |
| 571 // Compute sim_lead_tissue_limit too, but just once. | |
| 572 sim_limit(1.0); | |
| 573 | |
| 574 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 575 if (pres_gradient >= 0) | |
| 576 { | |
| 577 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; | |
| 578 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco | |
| 579 need_stop = 1; // Hit. | |
| 580 | |
| 581 // Implement last stop at 4m/5m/6m... | |
| 582 if( temp_depth_limit == 3 ) | |
| 583 temp_depth_limit = char_I_depth_last_deco; | |
| 584 } | |
| 585 else | |
| 586 temp_depth_limit = 0; | |
| 587 } | |
| 588 | |
| 589 //---- Check gas change -------------------------------------------------- | |
| 590 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, | |
| 591 | |
| 592 return need_stop; | |
| 593 } | |
| 594 | |
| 595 ////////////////////////////////////////////////////////////////////////////// | |
| 596 // copy_deco_table | |
| 597 // | |
| 598 // Buffer the stops, once computed, so we can continue to display them | |
| 599 // while computing the next set. | |
| 600 // | |
| 601 static void copy_deco_table(void) | |
| 602 { | |
| 603 // Copy depth of the first (deepest) stop, because when reversing | |
| 604 // order, it will be hard to find... | |
| 111 | 605 char_O_first_deco_depth = internal_deco_depth[0]; |
| 0 | 606 char_O_first_deco_time = internal_deco_time [0]; |
| 607 | |
| 608 { | |
| 609 overlay unsigned char x, y; | |
| 610 | |
| 611 for(x=0; x<NUM_STOPS; x++) | |
| 612 { | |
| 613 char_O_deco_depth[x] = internal_deco_depth[x]; | |
| 614 char_O_deco_time [x] = internal_deco_time [x]; | |
| 111 | 615 char_O_deco_gas [x] = internal_deco_gas [x]; |
| 0 | 616 } |
| 617 | |
| 618 //Now fill the char_O_deco_time_for_log array | |
| 619 //---- First: search the first non-null depth | |
| 620 for(x=(NUM_STOPS-1); x != 0; --x) | |
| 621 if( internal_deco_depth[x] != 0 ) break; | |
| 622 | |
| 623 //---- Second: copy to output table (in reverse order) | |
| 624 for(y=0; y<NUM_STOPS; y++, --x) | |
| 625 { | |
| 626 char_O_deco_time_for_log[y] = internal_deco_time [x]; | |
| 627 | |
| 628 // Stop only once the last transfer is done. | |
| 629 if( x == 0 ) break; | |
| 630 } | |
| 631 | |
| 632 //---- Third: fill table end with null | |
| 633 for(y++; y<NUM_STOPS; y++) | |
| 634 { | |
| 635 char_O_deco_time_for_log [y] = 0; | |
| 111 | 636 char_O_deco_gas [y] = 0; |
| 0 | 637 } |
| 638 } | |
| 639 } | |
| 640 | |
| 641 ////////////////////////////////////////////////////////////////////////////// | |
| 642 // temp_tissue_safety // | |
| 643 // | |
| 644 // outsourced in v.102 | |
| 645 // | |
| 646 // Apply safety factors for brand ZH-L16 model. | |
| 647 // | |
| 648 static void temp_tissue_safety(void) | |
| 649 { | |
| 650 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); | |
| 651 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 652 | |
| 653 if( char_I_deco_model == 0 ) | |
| 654 { | |
| 655 if( temp_tissue < 0.0 ) | |
| 656 temp_tissue *= float_desaturation_multiplier; | |
| 657 else | |
| 658 temp_tissue *= float_saturation_multiplier; | |
| 659 } | |
| 660 } | |
| 661 | |
| 662 ////////////////////////////////////////////////////////////////////////////// | |
| 663 ////////////////////////////////////////////////////////////////////////////// | |
| 664 // ** THE JUMP-IN CODE ** | |
| 665 // ** for the asm code ** | |
| 666 ////////////////////////////////////////////////////////////////////////////// | |
| 667 ////////////////////////////////////////////////////////////////////////////// | |
| 668 | |
| 669 ////////////////////////////////////////////////////////////////////////////// | |
| 670 // Called every 2 seconds during diving. | |
| 671 // update tissues every time. | |
| 672 // | |
| 673 // Every 6 seconds (or slower when TTS > 16): | |
| 674 // - update deco table (char_O_deco_time/depth) with new values. | |
| 675 // - update ascent time, | |
| 676 // - set status to zero (so we can check there is new results). | |
| 677 // | |
| 678 void deco_calc_hauptroutine(void) | |
| 679 { | |
| 680 RESET_C_STACK | |
| 681 calc_hauptroutine(); | |
| 682 int_O_desaturation_time = 65535; | |
| 683 } | |
| 684 | |
| 685 ////////////////////////////////////////////////////////////////////////////// | |
| 686 // Reset decompression model: | |
| 687 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 688 // + Reset last stop to 0m | |
| 689 // + Reset all model output. | |
| 690 void deco_clear_tissue(void) | |
| 691 { | |
| 692 RESET_C_STACK | |
| 693 clear_tissue(); | |
| 694 } | |
| 695 | |
| 696 ////////////////////////////////////////////////////////////////////////////// | |
| 697 // Called every 1 min during decoplanning. | |
| 698 // Update tissues for 1 min. | |
| 699 // | |
| 700 void deco_calc_tissue(void) | |
| 701 { | |
| 702 RESET_C_STACK | |
| 703 calc_hauptroutine_update_tissues(); | |
| 704 } | |
| 705 | |
| 706 ////////////////////////////////////////////////////////////////////////////// | |
| 707 | |
| 708 void deco_calc_wo_deco_step_1_min(void) | |
| 709 { | |
| 710 RESET_C_STACK | |
| 711 calc_wo_deco_step_1_min(); | |
| 712 deco_calc_desaturation_time(); | |
| 713 } | |
| 714 | |
| 715 ////////////////////////////////////////////////////////////////////////////// | |
| 716 | |
| 717 void deco_calc_dive_interval(void) | |
| 718 { | |
| 719 RESET_C_STACK | |
| 720 calc_dive_interval(); | |
| 721 } | |
| 722 | |
| 723 ////////////////////////////////////////////////////////////////////////////// | |
| 724 // Find current gas in the list (if any). | |
| 725 // | |
| 726 // Input: char_I_current_gas = 1..6 | |
| 727 // | |
| 728 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. | |
| 729 // | |
| 730 static void gas_switch_find_current(void) | |
| 731 { | |
| 732 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); | |
| 733 | |
| 734 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 | |
| 735 { | |
| 736 sim_gas_last_used = char_I_current_gas; | |
| 737 | |
| 738 // Note: if current is first gas, we must find it, but not set | |
| 739 // last depth change to surface. | |
| 740 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
| 741 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
| 742 } | |
| 743 else | |
| 744 sim_gas_last_used = 0; // Gas 6 = manual set | |
| 745 } | |
| 746 | |
| 747 ////////////////////////////////////////////////////////////////////////////// | |
| 748 // Find deepest available gas. | |
| 749 // | |
| 750 // Input: temp_depth_limit, | |
| 751 // deco_gas_change[] | |
| 752 // sim_gas_depth_used, sim_dive_mins. | |
| 753 // | |
| 754 // RETURNS TRUE if a stop is needed for gas switch. | |
| 755 // | |
| 756 // Output: temp_depth_limit, sim_gas_depth_used IFF the is a switch. | |
| 757 // | |
| 758 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used | |
| 759 // are null), or during the ascent to make sure we are not passing a | |
| 760 // stop (in which case both can be already set). | |
| 761 // | |
| 762 static unsigned char gas_switch_deepest(void) | |
| 763 { | |
| 764 overlay unsigned char switch_deco = 0, switch_last = 0; | |
| 765 | |
| 766 if (char_I_const_ppO2 == 0) | |
| 767 { | |
| 768 overlay unsigned char j; | |
| 769 | |
| 770 // Loop over all enabled gas, to find the deepest one, | |
| 771 // above last used gas, but below temp_depth_limit. | |
| 772 for(j=0; j<NUM_GAS; ++j) | |
| 773 { | |
| 774 // Gas not (yet) allowed ? Skip ! | |
| 775 if( temp_depth_limit > deco_gas_change[j] ) | |
| 776 continue; | |
| 777 | |
| 778 // Gas deeper (or equal) than the current one ? Skip ! | |
| 779 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) | |
| 780 continue; | |
| 781 | |
| 782 // First, or deeper ? | |
| 783 if( switch_deco < deco_gas_change[j] ) | |
| 784 { | |
| 785 switch_deco = deco_gas_change[j]; | |
| 786 switch_last = j+1; // 1..5 | |
| 787 } | |
| 788 } | |
| 789 } | |
| 790 | |
| 791 // If there is a better gas available | |
| 792 if( switch_deco ) | |
| 793 { | |
| 794 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); | |
| 795 | |
| 796 sim_gas_last_depth = switch_deco; | |
| 797 sim_gas_last_used = switch_last; | |
| 798 return 0; | |
| 799 } | |
| 800 return 0; | |
| 801 } | |
| 802 | |
| 803 ////////////////////////////////////////////////////////////////////////////// | |
| 804 // Calculate gas switches | |
| 805 // | |
| 806 // | |
| 807 // Input: N2_ratio, He_ratio. | |
| 808 // sim_gas_last_used | |
| 809 // | |
| 810 // Output: calc_N2_ratio, calc_He_ratio | |
| 811 // | |
| 812 static void gas_switch_set(void) | |
| 813 { | |
| 814 assert( sim_gas_last_used <= NUM_GAS ); | |
| 815 | |
| 816 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. | |
| 817 { | |
| 818 calc_N2_ratio = N2_ratio; | |
| 819 calc_He_ratio = He_ratio; | |
| 820 } | |
| 821 else | |
| 822 { | |
| 823 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
| 824 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
| 825 } | |
| 826 | |
| 827 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
|
114
109df032cc54
minor fix: assert should pass for pure helium diluant
heinrichsweikamp
parents:
111
diff
changeset
|
828 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 1.00 ); |
| 0 | 829 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); |
| 830 } | |
| 831 | |
| 832 ////////////////////////////////////////////////////////////////////////////// | |
| 833 // | |
| 834 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. | |
| 835 // temp_deco : simulated respiration pressure | |
| 836 // float_deco_distance : security factor. | |
| 837 // Water-vapor pressure inside limbs (ppWater). | |
| 838 // | |
| 839 // Output: ppN2, ppHe. | |
| 840 // | |
| 841 static void sim_alveolar_presures(void) | |
| 842 { | |
| 843 overlay float deco_diluent = temp_deco; // new in v.101 | |
| 844 | |
| 845 // Take deco offset into account, but not at surface. | |
| 846 // Note: this should be done on ambiant pressure, hence before | |
| 847 // computing the diluant partial pressure... | |
| 848 if( deco_diluent > pres_surface ) | |
| 849 deco_diluent += float_deco_distance; | |
| 850 | |
| 851 //---- CCR mode : deco gas switch ? -------------------------------------- | |
| 852 if( char_I_const_ppO2 != 0 ) | |
| 853 { | |
| 854 // In CCR mode, use calc_XX_ratio instead of XX_ratio. | |
| 855 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
| 856 // ppWater in the equations below: | |
| 857 deco_diluent -= const_ppO2; | |
| 858 deco_diluent /= calc_N2_ratio + calc_He_ratio; | |
| 859 | |
| 860 if (deco_diluent > temp_deco) | |
| 861 deco_diluent = temp_deco; | |
| 862 } | |
| 863 | |
| 864 if( deco_diluent > ppWater ) | |
| 865 { | |
| 866 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); | |
| 867 ppHe = calc_He_ratio * (deco_diluent - ppWater); | |
| 868 } | |
| 869 else | |
| 870 { | |
| 871 ppN2 = 0.0; | |
| 872 ppHe = 0.0; | |
| 873 } | |
| 874 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); | |
| 875 assert( 0.0 <= ppHe && ppHe < 14.0 ); | |
| 876 } | |
| 877 | |
| 878 ////////////////////////////////////////////////////////////////////////////// | |
| 879 // clear_tissue | |
| 880 // | |
| 881 // optimized in v.101 (var_N2_a) | |
| 882 // | |
| 883 // preload tissues with standard pressure for the given ambient pressure. | |
| 884 // Note: fixed N2_ratio for standard air. | |
| 885 // | |
| 886 static void clear_tissue(void) | |
| 887 { | |
| 888 overlay float p; | |
| 889 | |
| 890 // Kludge: the 0.0002 of 0.7902 are missing with standard air. | |
| 891 N2_ratio = 0.7902; | |
| 892 pres_respiration = int_I_pres_respiration * 0.001; | |
| 893 | |
| 894 p = N2_ratio * (pres_respiration - ppWater); | |
| 895 for(ci=0; ci<NUM_COMP; ci++) | |
| 896 { | |
| 897 // cycle through the 16 Bühlmann N2 tissues | |
| 898 pres_tissue_N2[ci] = p; | |
| 899 | |
| 900 // cycle through the 16 Bühlmann tissues for Helium | |
| 901 pres_tissue_He[ci] = 0.0; | |
| 902 } | |
| 903 | |
| 904 clear_deco_table(); | |
| 905 char_O_deco_status = 0; | |
| 906 char_O_nullzeit = 0; | |
| 907 int_O_ascenttime = 0; | |
| 908 char_O_gradient_factor = 0; | |
| 909 char_O_relative_gradient_GF = 0; | |
| 910 | |
| 911 calc_lead_tissue_limit = 0.0; | |
| 912 char_O_gtissue_no = 0; | |
| 913 } | |
| 914 | |
| 915 ////////////////////////////////////////////////////////////////////////////// | |
| 916 // calc_hauptroutine | |
| 917 // | |
| 918 // this is the major code in dive mode calculates: | |
| 919 // the tissues, | |
| 920 // the bottom time, | |
| 921 // and simulates the ascend with all deco stops. | |
| 922 // | |
| 923 // The deco_state sequence is : | |
| 924 // 3 (at surface) | |
| 925 // +---> 0 : calc nullzeit | |
| 926 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 927 // | +-> 1 : simulate up to 16min of stops. | |
| 928 // | +------< not finished | |
| 929 // +--------< finish | |
| 930 // | |
| 931 // Added steps 6,5 for @+5 calculation: | |
| 932 // 6 = ascent to first stop (same as 2), except continue to 7 | |
| 933 // 7 = same as 1, except loop to 7. | |
| 934 // | |
| 935 static void calc_hauptroutine(void) | |
| 936 { | |
| 937 static unsigned char backup_gas_used; | |
| 938 static unsigned char backup_gas_depth; | |
| 939 | |
| 940 calc_hauptroutine_data_input(); | |
| 941 | |
| 942 calc_hauptroutine_update_tissues(); | |
| 943 calc_gradient_factor(); | |
| 944 | |
| 945 // toggle between calculation for nullzeit (bottom time), | |
| 946 // deco stops | |
| 947 // and more deco stops (continue) | |
| 948 switch( char_O_deco_status ) | |
| 949 { | |
| 950 case 3: //---- At surface: start a new dive ------------------------------ | |
| 951 clear_deco_table(); | |
| 952 copy_deco_table(); | |
| 953 int_O_ascenttime = 0; // Reset DTR. | |
| 954 int_O_extra_ascenttime = 0; | |
| 955 char_O_nullzeit = 0; // Reset bottom time. | |
| 956 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. | |
| 957 | |
| 958 // Values that should be reset just once for the full real dive. | |
| 959 // This is used to record the lowest stop for the whole dive, | |
| 960 // Including ACCROSS all simulated ascent. | |
| 961 low_depth = 0; | |
| 962 locked_GF_step = 0.0; | |
| 963 | |
| 964 // Reset gas switch history. | |
| 965 backup_gas_used = sim_gas_last_used = 0; | |
| 966 backup_gas_depth = sim_gas_last_depth = 0; | |
| 967 sim_dive_mins = 0; | |
| 968 break; | |
| 969 | |
| 970 case 0: //---- bottom time ----------------------------------------------- | |
| 971 default: | |
| 972 gas_switch_find_current(); // Lookup for current gas & time. | |
| 973 gas_switch_set(); // setup calc_ratio's | |
| 974 | |
| 975 calc_nullzeit(); | |
| 976 if( char_O_nullzeit > 0 ) // Some NDL time left ? | |
| 977 { | |
| 978 char_O_deco_status = 0; // YES: recalc ndl next time. | |
| 979 clear_deco_table(); // Also clear stops ! | |
| 980 copy_deco_table(); | |
| 981 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) | |
| 982 } | |
| 983 else | |
| 984 char_O_deco_status = 2; // NO: calc ascent next time. | |
| 985 break; | |
| 986 | |
| 987 case 2: //---- Simulate ascent to first stop ----------------------------- | |
| 988 case 6: // @+5min variation | |
| 989 // Check proposed gas at begin of ascent simulation | |
| 990 sim_dive_mins = int_I_divemins; // Init current time. | |
| 991 | |
| 992 gas_switch_find_current(); // Lookup for current gas & time. | |
| 993 gas_switch_set(); // setup calc_ratio's | |
| 994 | |
| 995 backup_gas_used = sim_gas_last_used; // And save for later simu steps. | |
| 996 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. | |
| 997 | |
| 998 sim_ascent_to_first_stop(); | |
| 999 | |
| 1000 // Calc stops next time (deco or gas switch). | |
| 1001 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); | |
| 1002 break; | |
| 1003 | |
| 1004 case 1: //---- Simulate stops -------------------------------------------- | |
| 1005 case 5: // @+5 variation. | |
| 1006 calc_hauptroutine_calc_deco(); | |
| 1007 | |
| 1008 // If simulation is finished, restore the GF low reference, so that | |
| 1009 // next ascent simulation is done from the current depth: | |
| 1010 if( (char_O_deco_status & 3) == 0 ) | |
| 1011 { | |
| 1012 sim_gas_last_used = backup_gas_used; | |
| 1013 sim_gas_last_depth = backup_gas_depth; | |
| 1014 } | |
| 1015 break; | |
| 1016 } | |
| 1017 } | |
| 1018 | |
| 1019 ////////////////////////////////////////////////////////////////////////////// | |
| 1020 // calc_hauptroutine_data_input | |
| 1021 // | |
| 1022 // Reset all C-code dive parameters from their ASM-code values. | |
| 1023 // Detect gas change condition. | |
| 1024 // | |
| 1025 void calc_hauptroutine_data_input(void) | |
| 1026 { | |
| 1027 overlay short int_temp; | |
| 1028 overlay unsigned char g; | |
| 1029 | |
| 1030 pres_respiration = int_I_pres_respiration * 0.001; | |
| 1031 pres_surface = int_I_pres_surface * 0.001; | |
| 1032 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1033 He_ratio = char_I_He_ratio * 0.01; | |
| 1034 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
| 1035 | |
| 1036 // ____________________________________________________ | |
| 1037 // | |
| 1038 // _____________ G A S _ C H A N G E S ________________ | |
| 1039 // ____________________________________________________ | |
| 1040 | |
| 1041 // Keep a margin of 150mbar = 1.50m | |
| 1042 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1043 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 1044 | |
| 1045 // Gas are selectable if we did not pass the change depth by more than 1.50m: | |
| 1046 for(g=0; g < NUM_GAS; ++g) | |
| 1047 { | |
| 1048 deco_gas_change[g] = 0; | |
| 1049 if(char_I_deco_gas_change[g]) | |
| 1050 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) | |
| 1051 deco_gas_change[g] = char_I_deco_gas_change[g]; | |
| 1052 } | |
| 1053 | |
| 1054 const_ppO2 = char_I_const_ppO2 * 0.01; | |
| 1055 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1056 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1057 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1058 GF_high = char_I_GF_High_percentage * 0.01; | |
| 1059 GF_delta = GF_high - GF_low; | |
| 1060 } | |
| 1061 | |
| 1062 ////////////////////////////////////////////////////////////////////////////// | |
| 1063 // | |
| 1064 // | |
| 1065 void calc_hauptroutine_update_tissues(void) | |
| 1066 { | |
| 1067 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); | |
| 1068 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
|
114
109df032cc54
minor fix: assert should pass for pure helium diluant
heinrichsweikamp
parents:
111
diff
changeset
|
1069 assert( (N2_ratio + He_ratio) <= 1.00 ); |
| 0 | 1070 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 1071 | |
| 1072 pres_diluent = pres_respiration; | |
| 1073 if( char_I_const_ppO2 != 0 ) | |
| 1074 { | |
| 1075 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); | |
| 1076 | |
| 1077 pres_diluent -= const_ppO2; | |
| 1078 pres_diluent /= N2_ratio + He_ratio; | |
| 1079 if( pres_diluent < 0.0 ) | |
| 1080 pres_diluent = 0.0; | |
| 1081 if( pres_diluent > pres_respiration ) | |
| 1082 pres_diluent = pres_respiration; | |
| 1083 | |
| 1084 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); | |
| 1085 | |
| 1086 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; | |
| 1087 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; | |
| 1088 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
| 1089 } | |
| 1090 | |
| 1091 if( pres_diluent > ppWater ) | |
| 1092 { | |
| 1093 overlay float EAD, END; | |
| 1094 | |
| 1095 ppN2 = N2_ratio * (pres_diluent - ppWater); | |
| 1096 ppHe = He_ratio * (pres_diluent - ppWater); | |
| 1097 | |
| 1098 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
| 1099 // with plain air. | |
| 1100 // ppN2 = 79% * (P_EAD - ppWater) | |
| 1101 // EAD = (P_EAD - Psurface) * 10 | |
| 1102 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 | |
| 1103 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; | |
| 1104 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; | |
| 1105 char_O_EAD = (unsigned char)(EAD + 0.5); | |
| 1106 | |
| 1107 // END : Equivalent Narcotic Dive. | |
| 1108 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
| 1109 // 0.23 btw). Hence the formula becomes: | |
| 1110 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater | |
| 1111 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER | |
| 1112 // | |
| 1113 // Source cited: | |
| 1114 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
| 1115 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
| 1116 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; | |
| 1117 if( END < 0.0 || END > 245.5 ) END = 0.0; | |
| 1118 char_O_END = (unsigned char)(END + 0.5); | |
| 1119 } | |
| 1120 else // new in v.101 | |
| 1121 { | |
| 1122 ppN2 = 0.0; | |
| 1123 ppHe = 0.0; | |
| 1124 char_O_EAD = char_O_END = 0; | |
| 1125 } | |
| 1126 | |
| 1127 if(!char_I_step_is_1min) | |
| 1128 calc_tissue(0); | |
| 1129 else | |
| 1130 calc_tissue(1); | |
| 1131 | |
| 1132 // Calc limit for surface, ie. GF_high. | |
| 1133 calc_limit(); | |
| 1134 | |
| 1135 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); | |
| 1136 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); | |
| 1137 } | |
| 1138 | |
| 1139 | |
| 1140 ////////////////////////////////////////////////////////////////////////////// | |
| 1141 // Compute stops. | |
| 1142 // | |
| 1143 // Note: because this can be very long, break on 16 iterations, and set state | |
| 1144 // to 0 when finished, or to 1 when needing to continue. | |
| 1145 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), | |
| 1146 // break the loop when total time > 512msec. | |
| 1147 // | |
| 1148 void calc_hauptroutine_calc_deco(void) | |
| 1149 { | |
| 1150 overlay unsigned char loop; | |
| 1151 | |
| 34 | 1152 for(loop = 0; loop < 16; ++loop) |
| 0 | 1153 { |
| 1154 // Limit loops to 512ms, using timer 5: | |
| 1155 if( tmr5() & (512*32) ) | |
| 1156 break; | |
| 34 | 1157 |
| 0 | 1158 if( calc_nextdecodepth() ) |
| 1159 { | |
| 1160 if( temp_depth_limit == 0 ) | |
| 1161 goto Surface; | |
| 1162 | |
| 1163 //---- We hit a stop at temp_depth_limit --------------------- | |
| 1164 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, | |
| 1165 + pres_surface; // To absolute. | |
| 1166 if( !update_deco_table() ) // Adds a one minute stops. | |
| 1167 goto Surface; // Deco table full: abort... | |
| 1168 } | |
| 1169 else | |
| 1170 { | |
| 1171 //---- No stop ----------------------------------------------- | |
| 1172 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. | |
| 1173 | |
| 1174 //---- Finish computations once surface is reached ----------- | |
| 1175 if( temp_deco <= pres_surface ) | |
| 1176 { | |
| 1177 Surface: | |
| 1178 if( char_O_deco_status == 1 ) // Don't in @+5min variant. | |
| 1179 copy_deco_table(); | |
| 1180 | |
| 1181 calc_ascenttime(); | |
| 1182 char_O_deco_status = 0; // calc nullzeit next time. | |
| 1183 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
| 1184 return; | |
| 1185 } | |
| 1186 } | |
| 1187 //---- Then update tissue -------------------------------------------- | |
| 1188 sim_dive_mins++; // Advance simulated time by 1 minute. | |
| 1189 gas_switch_set(); // Apply any simulated gas change, once validated. | |
| 1190 sim_alveolar_presures(); // Updates ppN2 and ppHe. | |
| 1191 sim_tissue(1); // Simulate compartiments for 1 minute. | |
| 1192 } | |
| 1193 | |
| 1194 // Surface not reached, need more stops... for menu animation. | |
| 1195 char_O_deco_last_stop = temp_depth_limit; // Reached depth. | |
| 1196 } | |
| 1197 | |
| 1198 | |
| 1199 ////////////////////////////////////////////////////////////////////////////// | |
| 1200 // Simulation ascention to first deco stop. | |
| 1201 // | |
| 1202 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), | |
| 1203 // there is no need to break on more that 16 iterations | |
| 1204 // (or we are already in deep shit). | |
| 1205 // | |
| 1206 // Input: pres_respiration | |
| 1207 // Output: temp_deco | |
| 1208 // | |
| 1209 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, | |
| 1210 // before ascent. | |
| 1211 void sim_ascent_to_first_stop(void) | |
| 1212 { | |
| 1213 overlay unsigned char fast = 1; // 1min or 2sec steps. | |
| 1214 | |
| 1215 update_startvalues(); | |
| 1216 clear_deco_table(); | |
| 1217 | |
| 1218 temp_deco = pres_respiration; // Starts from current real depth. | |
| 1219 | |
| 1220 // Are we doing the special @+5min variation ? | |
| 1221 if(char_O_deco_status & 4) | |
| 1222 sim_extra_time(); | |
| 1223 | |
| 1224 //---- Loop until first stop, gas switch, or surface is reached ---------- | |
| 1225 for(;;) | |
| 1226 { | |
| 1227 overlay float old_deco = temp_deco; // Pamb backup (bars) | |
| 1228 | |
| 1229 // Try ascending 1 full minute (fast) or 2sec (!fast): | |
| 1230 if( fast ) | |
| 1231 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. | |
| 1232 else | |
| 1233 temp_deco -= (10.0/30.0)*METER_TO_BAR; // 2sec at 10m/min. | |
| 1234 | |
| 1235 if( temp_deco < pres_surface ) // But don't go over surface. | |
| 1236 temp_deco = pres_surface; | |
| 1237 | |
| 1238 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because | |
| 1239 // one minute passed. | |
| 1240 sim_limit(GF_low); | |
| 1241 | |
| 1242 // Did we reach deepest remaining stop ? | |
| 1243 if( temp_deco < sim_lead_tissue_limit ) | |
| 1244 { | |
| 1245 temp_deco = old_deco; // Restore last correct depth, | |
| 1246 | |
| 1247 if( fast ) | |
| 1248 { | |
| 1249 fast = 0; // Retry with 2sec steps. | |
| 1250 continue; | |
| 1251 } | |
| 1252 else | |
| 1253 break; // Done... | |
| 1254 } | |
| 1255 | |
| 1256 // Did we reach surface ? | |
| 1257 // NOTE: we should round BEFORE checking surface is reached. | |
| 1258 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); | |
| 1259 if( temp_depth_limit == 0 ) | |
| 1260 { | |
| 1261 temp_deco = pres_surface; // Yes: finished ! | |
| 1262 break; | |
| 1263 } | |
| 1264 | |
| 1265 // Check for gas change below new depth ? | |
| 1266 if( gas_switch_deepest() ) | |
| 1267 { | |
| 1268 assert( temp_depth_limit > 0); | |
| 1269 | |
| 1270 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; | |
| 1271 break; | |
| 1272 } | |
| 1273 | |
| 1274 if( fast ) | |
| 1275 sim_dive_mins++; // Advance simulated time by 1 minute. | |
| 1276 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe | |
| 1277 sim_tissue(fast); // and update tissues for 1 min. | |
| 1278 } | |
| 1279 } | |
| 1280 | |
| 1281 ////////////////////////////////////////////////////////////////////////////// | |
| 1282 // Simulation extra time at the current depth. | |
| 1283 // | |
| 1284 // This routine is used for @+5min feature. | |
| 1285 void sim_extra_time(void) | |
| 1286 { | |
| 1287 overlay unsigned char extra = char_I_extra_time; | |
| 1288 do { | |
| 1289 sim_dive_mins++; // Advance simulated time by 1 minute. | |
| 1290 sim_tissue(1); // and update tissues for 1 min. | |
| 1291 } while( --extra != 0 ); | |
| 1292 } | |
| 1293 | |
| 1294 ////////////////////////////////////////////////////////////////////////////// | |
| 1295 // calc_tissue | |
| 1296 // | |
| 1297 // optimized in v.101 | |
| 1298 // | |
| 1299 static void calc_tissue(PARAMETER unsigned char period) | |
| 1300 { | |
| 1301 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m | |
| 1302 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 1303 | |
| 1304 for (ci=0;ci<NUM_COMP;ci++) | |
| 1305 { | |
| 1306 read_buhlmann_times(period); // 2 sec or 1 min period. | |
| 1307 | |
| 1308 // N2 | |
| 1309 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; | |
| 1310 temp_tissue_safety(); | |
| 1311 pres_tissue_N2[ci] += temp_tissue; | |
| 1312 | |
| 1313 // He | |
| 1314 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; | |
| 1315 temp_tissue_safety(); | |
| 1316 pres_tissue_He[ci] += temp_tissue; | |
| 1317 } | |
| 1318 } | |
| 1319 | |
| 1320 ////////////////////////////////////////////////////////////////////////////// | |
| 1321 // calc_limit | |
| 1322 // | |
| 1323 // New in v.111 : separated from calc_tissue(), and depends on GF value. | |
| 1324 // | |
| 1325 static void calc_limit(void) | |
| 1326 { | |
| 1327 char_O_gtissue_no = 255; | |
| 1328 calc_lead_tissue_limit = 0.0; | |
| 1329 | |
| 1330 for(ci=0; ci<NUM_COMP;ci++) | |
| 1331 { | |
| 1332 overlay float N2 = pres_tissue_N2[ci]; | |
| 1333 overlay float He = pres_tissue_He[ci]; | |
| 1334 overlay float p = N2 + He; | |
| 1335 | |
| 1336 read_buhlmann_coefficients(); | |
| 1337 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; | |
| 1338 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 1339 | |
| 1340 // Apply the Eric Baker's varying gradient factor correction. | |
| 1341 // Note: the correction factor depends both on GF and b, | |
| 1342 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1343 // so that can change who is the leading gas... | |
| 1344 // Note: Also depends of the GF. So the calcul is different for | |
| 1345 // GF_low, current GF, or GF_high... | |
| 1346 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1347 // hence what would happend at surface, | |
| 1348 // hence at GF_high. | |
| 1349 if( char_I_deco_model != 0 ) | |
| 1350 p = ( p - var_N2_a * GF_high) * var_N2_b | |
| 1351 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
| 1352 else | |
| 1353 p = (p - var_N2_a) * var_N2_b; | |
| 1354 if( p < 0.0 ) p = 0.0; | |
| 1355 | |
| 1356 if( p > calc_lead_tissue_limit ) | |
| 1357 { | |
| 1358 char_O_gtissue_no = ci; | |
| 1359 calc_lead_tissue_limit = p; | |
| 1360 } | |
| 1361 } | |
| 1362 | |
| 1363 assert( char_O_gtissue_no < NUM_COMP ); | |
| 1364 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); | |
| 1365 } | |
| 1366 | |
| 1367 ////////////////////////////////////////////////////////////////////////////// | |
| 1368 // calc_nullzeit | |
| 1369 // | |
| 1370 // calculates the remaining bottom time | |
| 1371 // | |
| 1372 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second | |
| 1373 // exponential term to the M-value equation, making it impossible to | |
| 1374 // invert... So we have to make a fast-simu until we find a better way. | |
| 1375 // | |
| 1376 // Input: pres_respiration | |
| 1377 // Output: char_O_nullzeit | |
| 1378 // | |
| 1379 static void calc_nullzeit(void) | |
| 1380 { | |
| 1381 //---- Compute ppN2 and ppHe --------------------------------------------- | |
| 1382 temp_deco = pres_respiration; | |
| 1383 sim_alveolar_presures(); | |
| 1384 | |
| 1385 char_O_nullzeit = 240; | |
| 1386 for(ci=0; ci<NUM_COMP; ci++) | |
| 1387 { | |
| 1388 //---- Read A/B values and loading factor for N2 and He -------------- | |
| 1389 overlay float tN2 = pres_tissue_N2[ci]; | |
| 1390 overlay float tHe = pres_tissue_He[ci]; | |
| 1391 overlay float t = tN2 + tHe; | |
| 1392 overlay unsigned char ndl; | |
| 1393 overlay unsigned char period = 10; | |
| 1394 | |
| 1395 read_buhlmann_coefficients(); | |
| 1396 read_buhlmann_times(2); // Starts with a 10min period. | |
| 1397 | |
| 1398 //---- Simulate for that tissue -------------------------------------- | |
| 1399 // NOTE: No need to simulate for longuer than the already found NDL. | |
| 1400 for(ndl=0; ndl<char_O_nullzeit;) | |
| 1401 { | |
| 1402 //---- Compute updated mix M-value at surface | |
| 1403 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; | |
| 1404 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; | |
| 1405 overlay float M0 = (a + pres_surface/b); | |
| 1406 | |
| 1407 //---- Add 10min/1min to N2/He tissues | |
| 1408 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; | |
| 1409 overlay float dTHe = (ppHe - tHe) * var_He_e; | |
| 1410 | |
| 1411 //---- Apply security margin when using the non-GF model | |
| 1412 if( char_I_deco_model == 0 ) | |
| 1413 { | |
| 1414 dTN2 *= float_saturation_multiplier; | |
| 1415 dTHe *= float_saturation_multiplier; | |
| 1416 } | |
| 1417 else // Or GF-based model | |
| 1418 M0 = GF_high * (M0 - pres_surface) + pres_surface; | |
| 1419 | |
| 1420 //---- Simulate off-gasing while going to surface | |
| 1421 // TODO ! | |
| 1422 // dTN2 -= exp( ... ascent time ... ppN2...) | |
| 1423 // dTHe -= exp( ... ascent time ... ppHe...) | |
| 1424 | |
| 1425 //---- Ok now, and still ok to surface after 1 or 10 minutes ? | |
| 1426 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) | |
| 1427 { | |
| 1428 tN2 += dTN2; // YES: apply gas loadings, | |
| 1429 tHe += dTHe; | |
| 1430 t = tN2 + tHe; | |
| 1431 ndl += period; // increment NDL, | |
| 1432 continue; // and loop. | |
| 1433 } | |
| 1434 | |
| 1435 //---- Should we retry with smaller steps ? | |
| 1436 if( period == 10 ) | |
| 1437 { | |
| 1438 read_buhlmann_times(1); // 1min coefs. | |
| 1439 period = 1; | |
| 1440 continue; | |
| 1441 } | |
| 1442 | |
| 1443 //---- ELSE make a linear approx for the last minute | |
| 1444 // Usefull to have a meaningfull rounding of NDL. | |
| 1445 // But ONLY it positive (negativ casted to unsigned is bad). | |
| 1446 if( M0 > t ) | |
| 1447 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
| 1448 break; | |
| 1449 } | |
| 1450 | |
| 1451 // Keep the shortest NDL found | |
| 1452 if( ndl < char_O_nullzeit ) | |
| 1453 char_O_nullzeit = ndl; | |
| 1454 } | |
| 1455 } | |
| 1456 | |
| 1457 ////////////////////////////////////////////////////////////////////////////// | |
| 1458 // calc_ascenttime | |
| 1459 // | |
| 1460 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, | |
| 1461 // and all stops. | |
| 1462 // | |
| 1463 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. | |
| 1464 static void calc_ascenttime(void) | |
| 1465 { | |
| 1466 overlay unsigned char x; | |
| 1467 overlay unsigned short sum; | |
| 1468 | |
| 1469 // + 0.7 to count 1 minute ascent time from 3 metre to surface | |
| 1470 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
| 1471 if (ascent < 0.0) | |
| 1472 ascent = 0.0; | |
| 1473 sum = (unsigned short)(ascent + 0.99); | |
| 1474 | |
| 1475 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) | |
| 1476 sum += (unsigned short)internal_deco_time[x]; | |
| 1477 | |
| 1478 if( char_O_deco_status == 1 ) | |
| 1479 int_O_ascenttime = sum; | |
| 1480 else | |
| 1481 int_O_extra_ascenttime = sum; | |
| 1482 | |
| 1483 if(int_O_ascenttime>999) | |
| 1484 int_O_ascenttime=999; // limit to 999' | |
| 1485 } | |
| 1486 | |
| 1487 ////////////////////////////////////////////////////////////////////////////// | |
| 1488 // update_startvalues | |
| 1489 // | |
| 1490 // updated in v.102 | |
| 1491 // | |
| 1492 void update_startvalues(void) | |
| 1493 { | |
| 1494 overlay unsigned char x; | |
| 1495 | |
| 1496 // Start ascent simulation with current tissue partial pressures. | |
| 1497 for(x=0; x<NUM_COMP; x++) | |
| 1498 { | |
| 1499 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; | |
| 1500 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
| 1501 } | |
| 1502 | |
| 1503 // No leading tissue (yet) for this ascent simulation. | |
| 1504 sim_lead_tissue_limit = 0.0; | |
| 1505 sim_lead_tissue_no = 255; | |
| 1506 } | |
| 1507 | |
| 1508 ////////////////////////////////////////////////////////////////////////////// | |
| 1509 // sim_tissue | |
| 1510 // | |
| 1511 // optimized in v.101 | |
| 1512 // | |
| 1513 // Function very simular to calc_tissue, but: | |
| 1514 // + Use a 1min or 10min period. | |
| 1515 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 1516 static void sim_tissue(PARAMETER unsigned char period) | |
| 1517 { | |
| 1518 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m | |
| 1519 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 1520 | |
| 1521 for(ci=0; ci<NUM_COMP; ci++) | |
| 1522 { | |
| 1523 read_buhlmann_times(period); // 1 or 10 minute(s) interval | |
| 1524 | |
| 1525 // N2 | |
| 1526 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; | |
| 1527 temp_tissue_safety(); | |
| 1528 sim_pres_tissue_N2[ci] += temp_tissue; | |
| 1529 | |
| 1530 // He | |
| 1531 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; | |
| 1532 temp_tissue_safety(); | |
| 1533 sim_pres_tissue_He[ci] += temp_tissue; | |
| 1534 } | |
| 1535 } | |
| 1536 | |
| 1537 ////////////////////////////////////////////////////////////////////////////// | |
| 1538 // sim_limit() | |
| 1539 // | |
| 1540 // New in v.111 | |
| 1541 // | |
| 1542 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1543 // different depth, because it depends on current gradient factor. | |
| 1544 // | |
| 1545 static void sim_limit(PARAMETER float GF_current) | |
| 1546 { | |
| 1547 assert( 0.0 < GF_current && GF_current <= 1.0f); | |
| 1548 | |
| 1549 sim_lead_tissue_limit = 0.0; | |
| 1550 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. | |
| 1551 | |
| 1552 for(ci=0; ci<NUM_COMP; ci++) | |
| 1553 { | |
| 1554 overlay float N2 = sim_pres_tissue_N2[ci]; | |
| 1555 overlay float He = sim_pres_tissue_He[ci]; | |
| 1556 overlay float p = N2 + He; | |
| 1557 | |
| 1558 read_buhlmann_coefficients(); | |
| 1559 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; | |
| 1560 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 1561 | |
| 1562 // Apply the Eric Baker's varying gradient factor correction. | |
| 1563 // Note: the correction factor depends both on GF and b, | |
| 1564 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1565 // so that can change who is the leading gas... | |
| 1566 // Note: Also depends of the GF_current... | |
| 1567 if( char_I_deco_model != 0 ) | |
| 1568 p = ( p - var_N2_a * GF_current) | |
| 1569 / (GF_current / var_N2_b + 1.0 - GF_current); | |
| 1570 else | |
| 1571 p = (p - var_N2_a) * var_N2_b; | |
| 1572 if( p < 0.0 ) p = 0.0; | |
| 1573 | |
| 1574 if( p > sim_lead_tissue_limit ) | |
| 1575 { | |
| 1576 sim_lead_tissue_no = ci; | |
| 1577 sim_lead_tissue_limit = p; | |
| 1578 } | |
| 1579 } // for ci | |
| 1580 | |
| 1581 assert( sim_lead_tissue_no < NUM_COMP ); | |
| 1582 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); | |
| 1583 } | |
| 1584 | |
| 1585 ////////////////////////////////////////////////////////////////////////////// | |
| 1586 // clear_deco_table | |
| 1587 // | |
| 1588 // unchanged in v.101 | |
| 1589 // | |
| 1590 static void clear_deco_table(void) | |
| 1591 { | |
| 1592 overlay unsigned char x; | |
| 1593 | |
| 1594 for(x=0; x<NUM_STOPS; ++x) | |
| 1595 { | |
| 1596 internal_deco_time [x] = 0; | |
| 1597 internal_deco_depth[x] = 0; | |
| 1598 } | |
| 1599 } | |
| 1600 | |
| 1601 ////////////////////////////////////////////////////////////////////////////// | |
| 1602 // update_deco_table | |
| 1603 // | |
| 1604 // Add 1 min to current stop. | |
| 1605 // | |
| 1606 // Inputs: | |
| 1607 // temp_depth_limit = stop's depth, in meters. | |
| 1608 // In/Out: | |
| 1609 // internal_deco_depth[] : depth (in metres) of each stops. | |
| 1610 // internal_deco_time [] : time (in minutes) of each stops. | |
| 1611 // | |
| 1612 static unsigned char update_deco_table() | |
| 1613 { | |
| 1614 overlay unsigned char x; | |
| 1615 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). | |
| 1616 assert( temp_depth_limit > 0 ); // No stop at surface... | |
| 1617 | |
| 1618 for(x=0; x<NUM_STOPS; ++x) | |
| 1619 { | |
| 1620 // Make sure deco-stops are recorded in order: | |
| 111 | 1621 assert( !internal_deco_depth[x] || temp_depth_limit <= internal_deco_depth[x] ); |
| 0 | 1622 |
| 111 | 1623 if( internal_deco_depth[x]== temp_depth_limit ) |
| 0 | 1624 { |
| 1625 // Do not overflow (max 255') | |
| 1626 if( internal_deco_time[x] < 255 ) | |
| 1627 { | |
| 1628 internal_deco_time[x]++; | |
| 1629 return 1; | |
| 1630 } | |
| 1631 // But store extra in the next stop... | |
| 1632 } | |
| 1633 | |
| 1634 if( internal_deco_depth[x] == 0 ) | |
| 1635 { | |
| 1636 internal_deco_depth[x] = temp_depth_limit; | |
| 1637 | |
| 1638 internal_deco_time[x] = 1; | |
| 111 | 1639 internal_deco_gas[x] = sim_gas_last_used; |
| 0 | 1640 return 1; |
| 1641 } | |
| 1642 } | |
| 1643 | |
| 1644 // Can't store stops at more than 96m. | |
| 1645 // Or stops at less that 3m too. | |
| 1646 // Just do nothing with that... | |
| 1647 return 0; | |
| 1648 } | |
| 1649 | |
| 1650 ////////////////////////////////////////////////////////////////////////////// | |
| 1651 // calc_gradient_factor | |
| 1652 // | |
| 1653 // optimized in v.101 (var_N2_a) | |
| 1654 // new code in v.102 | |
| 1655 // | |
| 1656 static void calc_gradient_factor(void) | |
| 1657 { | |
| 1658 overlay float gf; | |
| 1659 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; | |
| 1660 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
| 1661 | |
| 1662 assert( char_O_gtissue_no < NUM_COMP ); | |
| 1663 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); | |
| 1664 | |
| 1665 // tissue > respiration (currently off-gasing) | |
| 1666 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. | |
| 1667 // GF = 100% when respiration == limit. | |
| 1668 temp_tissue = N2 + He; | |
| 1669 if( temp_tissue <= pres_respiration ) | |
| 1670 gf = 0.0; | |
| 1671 else | |
| 1672 { | |
| 1673 overlay float limit = calc_lead_tissue_limit; | |
| 1674 // NOTE: in GF model, calc_lead_tissue_limit include already the | |
| 1675 // correction due to gradient factor. To compute the actual | |
| 1676 // current GF, we need to (re-)compute the raw ambiant-pressure | |
| 1677 // limit from the Bühlmann model. | |
| 1678 if( char_I_deco_model != 0 ) | |
| 1679 { | |
| 1680 ci = char_O_gtissue_no; | |
| 1681 read_buhlmann_coefficients(); | |
| 1682 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; | |
| 1683 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; | |
| 1684 limit = (temp_tissue - var_N2_a) * var_N2_b; | |
| 1685 } | |
| 1686 | |
| 1687 gf = (temp_tissue - pres_respiration) | |
| 1688 / (temp_tissue - limit) | |
| 1689 * 100.0; | |
| 1690 if( gf > 254.5 ) gf = 255.0; | |
| 1691 if( gf < 0.0 ) gf = 0.0; | |
| 1692 } | |
| 1693 char_O_gradient_factor = (unsigned char)(gf+0.5f); | |
| 1694 | |
| 1695 if( char_I_deco_model != 0 ) // calculate relative gradient factor | |
| 1696 { | |
| 1697 overlay float rgf; | |
| 1698 | |
| 1699 if( low_depth < 3 ) | |
| 1700 rgf = GF_high; | |
| 1701 else | |
| 1702 { | |
| 1703 overlay float temp1 = low_depth * METER_TO_BAR; | |
| 1704 overlay float temp2 = pres_respiration - pres_surface; | |
| 1705 | |
| 1706 if (temp2 <= 0) | |
| 1707 rgf = GF_high; | |
| 1708 else if (temp2 >= temp1) | |
| 1709 rgf = GF_low; | |
| 1710 else | |
| 1711 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 1712 } | |
| 1713 | |
| 1714 rgf = gf / rgf; // gf is already in percent | |
| 1715 if( rgf < 0.0 ) rgf = 0.0; | |
| 1716 if( rgf > 254.5 ) rgf = 255.0; | |
| 1717 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); | |
| 1718 } | |
| 1719 else | |
| 1720 char_O_relative_gradient_GF = char_O_gradient_factor; | |
| 1721 } | |
| 1722 | |
| 1723 ////////////////////////////////////////////////////////////////////////////// | |
| 1724 // deco_calc_desaturation_time | |
| 1725 // | |
| 1726 // FIXED N2_ratio | |
| 1727 // unchanged in v.101 | |
| 1728 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier | |
| 1729 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] | |
| 1730 // | |
| 1731 void deco_calc_desaturation_time(void) | |
| 1732 { | |
| 1733 RESET_C_STACK | |
| 1734 | |
| 1735 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); | |
| 1736 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1737 | |
| 1738 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann | |
| 1739 pres_surface = int_I_pres_surface * 0.001; | |
| 1740 ppN2 = N2_ratio * (pres_surface - ppWater); | |
| 1741 int_O_desaturation_time = 0; | |
| 1742 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); | |
| 1743 | |
| 1744 for(ci=0; ci<NUM_COMP; ci++) | |
| 1745 { | |
| 1746 overlay unsigned short desat_time; // For a particular compartiment, in min. | |
| 1747 overlay float temp1; | |
| 1748 overlay float temp2; | |
| 1749 overlay float temp3; | |
| 1750 overlay float temp4; | |
| 1751 | |
| 1752 read_buhlmann_ht(); | |
| 1753 | |
| 1754 // saturation_time (for flight) and N2_saturation in multiples of halftime | |
| 1755 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1756 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1757 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations | |
| 1758 // N2 | |
| 1759 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; | |
| 1760 temp2 = ppN2 - pres_tissue_N2[ci]; | |
| 1761 if (temp2 >= 0.0) | |
| 1762 temp1 = 0.0; | |
| 1763 else | |
| 1764 temp1 = temp1 / temp2; | |
| 1765 | |
| 1766 if( 0.0 < temp1 && temp1 < 1.0 ) | |
| 1767 { | |
| 1768 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1769 // minus because log is negative. | |
| 1770 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. | |
| 1771 temp2 = var_N2_ht * temp1 / float_desaturation_multiplier; // time necessary (in minutes ) for complete desaturation (see comment about 5 percent) | |
| 1772 } | |
| 1773 else | |
| 1774 { | |
| 1775 temp1 = 0.0; | |
| 1776 temp2 = 0.0; | |
| 1777 } | |
| 1778 | |
| 1779 // He | |
| 1780 temp3 = 0.1 - pres_tissue_He[ci]; | |
| 1781 if (temp3 >= 0.0) | |
| 1782 temp3 = 0.0; | |
| 1783 else | |
| 1784 temp3 = - temp3 / pres_tissue_He[ci]; | |
| 1785 | |
| 1786 if( 0.0 < temp3 && temp3 < 1.0 ) | |
| 1787 { | |
| 1788 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. | |
| 1789 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1790 // minus because log is negative | |
| 1791 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier | |
| 1792 } | |
| 1793 else | |
| 1794 { | |
| 1795 temp3 = 0.0; | |
| 1796 temp4 = 0.0; | |
| 1797 } | |
| 1798 | |
| 1799 // saturation_time (for flight) | |
| 1800 if (temp4 > temp2) | |
| 1801 desat_time = (unsigned short)temp4; | |
| 1802 else | |
| 1803 desat_time = (unsigned short)temp2; | |
| 1804 | |
| 1805 if(desat_time > int_O_desaturation_time) | |
| 1806 int_O_desaturation_time = desat_time; | |
| 1807 | |
| 1808 // N2 saturation in multiples of halftime for display purposes | |
| 1809 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1810 temp2 = temp2 + 80.0; // set center | |
| 1811 if (temp2 < 0.0) | |
| 1812 temp2 = 0.0; | |
| 1813 if (temp2 > 255.0) | |
| 1814 temp2 = 255.0; | |
| 1815 char_O_tissue_N2_saturation[ci] = (char)temp2; | |
| 1816 | |
| 1817 // He saturation in multiples of halftime for display purposes | |
| 1818 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1819 temp4 = temp4 + 80.0; // set center | |
| 1820 if (temp4 < 0.0) | |
| 1821 temp4 = 0.0; | |
| 1822 if (temp4 > 255.0) | |
| 1823 temp4 = 255.0; | |
| 1824 char_O_tissue_He_saturation[ci] = (char)temp4; | |
| 1825 } // for | |
| 1826 } | |
| 1827 | |
| 1828 ////////////////////////////////////////////////////////////////////////////// | |
| 1829 // calc_wo_deco_step_1_min | |
| 1830 // | |
| 1831 // FIXED N2 Ratio | |
| 1832 // optimized in v.101 (...saturation_multiplier) | |
| 1833 // desaturation slowed down to 70,42% | |
| 1834 // | |
| 1835 static void calc_wo_deco_step_1_min(void) | |
| 1836 { | |
| 1837 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); | |
| 1838 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
| 1839 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
| 1840 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1841 | |
| 1842 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
| 1843 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
| 1844 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 1845 ppHe = 0.0; | |
| 1846 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); | |
| 1847 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1848 | |
| 1849 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure | |
| 1850 | |
| 1851 clear_deco_table(); | |
| 1852 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. | |
| 1853 char_O_nullzeit = 0; | |
| 1854 int_O_ascenttime = 0; | |
| 1855 int_O_extra_ascenttime = 0; | |
| 1856 calc_gradient_factor(); | |
| 1857 } | |
| 1858 | |
| 1859 ////////////////////////////////////////////////////////////////////////////// | |
| 1860 // calc_dive_interval | |
| 1861 // | |
| 1862 // Prepare tissue for delay before the next dive simulation. | |
| 1863 // | |
| 1864 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
| 1865 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
| 1866 // | |
| 1867 // Should be protected by deco_push_tissues_to_vault(), | |
| 1868 // deco_pull_tissues_from_vault() | |
| 1869 // | |
| 1870 // desaturation slowed down to 70,42%. | |
| 1871 // | |
| 1872 static void calc_dive_interval(void) | |
| 1873 { | |
| 1874 overlay unsigned char t; | |
| 1875 overlay unsigned char backup_model; | |
| 1876 | |
| 1877 //---- Initialize simulation parameters ---------------------------------- | |
| 1878 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
| 1879 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
| 1880 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 1881 ppHe = 0.0; | |
| 1882 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); | |
| 1883 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1884 | |
| 1885 // Make sure SURFACE_DESAT_FACTOR is applied: | |
| 1886 backup_model = char_I_deco_model; | |
| 1887 char_I_deco_model = 0; | |
| 1888 | |
| 1889 //---- Perform simulation ------------------------------------------------ | |
| 1890 for(t=0; t<char_I_dive_interval; ++t) | |
| 1891 { | |
| 1892 calc_tissue(2); // period = 10min. | |
| 1893 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
| 1894 } | |
| 1895 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); | |
| 1896 int_O_CNS_fraction = (unsigned int)(CNS_fraction * 100.0 + 0.5); | |
| 1897 | |
| 1898 //---- Restore model ----------------------------------------------------- | |
| 1899 char_I_deco_model = backup_model; | |
| 1900 } | |
| 1901 | |
| 1902 ////////////////////////////////////////////////////////////////////////////// | |
| 1903 // deco_clear_CNS_fraction | |
| 1904 // | |
| 1905 // new in v.101 | |
| 1906 // | |
| 1907 void deco_clear_CNS_fraction(void) | |
| 1908 { | |
| 1909 RESET_C_STACK | |
| 1910 | |
| 1911 CNS_fraction = 0.0; | |
| 1912 int_O_CNS_fraction = 0; | |
| 1913 } | |
| 1914 | |
| 1915 ////////////////////////////////////////////////////////////////////////////// | |
| 1916 // deco_calc_CNS_fraction | |
| 1917 // | |
| 1918 // Input: char_I_actual_ppO2 : Current condition (in decibars). | |
| 1919 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. | |
| 1920 // CNS_fraction : velue before period. | |
| 1921 // Output: CNS_fraction, int_O_CNS_fraction | |
| 1922 // | |
| 1923 void deco_calc_CNS_fraction(void) | |
| 1924 { | |
| 1925 overlay float time_factor = 1.0f; | |
| 1926 RESET_C_STACK | |
| 1927 | |
| 1928 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); | |
| 1929 assert( char_I_actual_ppO2 > 15 ); | |
| 1930 | |
| 1931 if( char_I_step_is_1min == 1 ) | |
| 1932 time_factor = 30.0f; | |
| 1933 else if( char_I_step_is_1min == 2 ) | |
| 1934 time_factor = 300.0f; | |
|
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1935 //------------------------------------------------------------------------ |
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1936 // Don't increase CNS below 0.5 bar, but keep it steady. |
| 0 | 1937 if (char_I_actual_ppO2 < 50) |
| 1938 ; // no changes | |
|
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1939 //------------------------------------------------------------------------ |
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1940 // Below (and including) 1.60 bar |
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1941 else if (char_I_actual_ppO2 < 61) |
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1942 CNS_fraction += time_factor/(-533.07 * char_I_actual_ppO2 + 54000.0); |
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1943 else if (char_I_actual_ppO2 < 71) |
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1944 CNS_fraction += time_factor/(-444.22 * char_I_actual_ppO2 + 48600.0); |
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1945 else if (char_I_actual_ppO2 < 81) |
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1946 CNS_fraction += time_factor/(-355.38 * char_I_actual_ppO2 + 42300.0); |
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1947 else if (char_I_actual_ppO2 < 91) |
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1948 CNS_fraction += time_factor/(-266.53 * char_I_actual_ppO2 + 35100.0); |
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1949 else if (char_I_actual_ppO2 < 111) |
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1950 CNS_fraction += time_factor/(-177.69 * char_I_actual_ppO2 + 27000.0); |
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1951 else if (char_I_actual_ppO2 < 152) |
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1952 CNS_fraction += time_factor/( -88.84 * char_I_actual_ppO2 + 17100.0); |
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1953 else if (char_I_actual_ppO2 < 167) |
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1954 CNS_fraction += time_factor/(-222.11 * char_I_actual_ppO2 + 37350.0); |
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1955 //------------------------------------------------------------------------ |
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1956 // Arieli et all.(2002): Modeling pulmonary and CNS O2 toxicity: |
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1957 // J Appl Physiol 92: 248256, 2002, doi:10.1152/japplphysiol.00434.2001 |
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1958 // Formula (A1) based on value for 1.55 and c=20 |
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1959 // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
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1960 else if (char_I_actual_ppO2 < 172) |
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1961 CNS_fraction += time_factor*0.00102; |
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1962 else if (char_I_actual_ppO2 < 177) |
| 0 | 1963 CNS_fraction += time_factor*0.00136; |
|
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1964 else if (char_I_actual_ppO2 < 182) |
| 0 | 1965 CNS_fraction += time_factor*0.00180; |
|
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1966 else if (char_I_actual_ppO2 < 187) |
| 0 | 1967 CNS_fraction += time_factor*0.00237; |
|
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1968 else if (char_I_actual_ppO2 < 192) |
| 0 | 1969 CNS_fraction += time_factor*0.00310; |
|
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1970 else if (char_I_actual_ppO2 < 198) |
| 0 | 1971 CNS_fraction += time_factor*0.00401; |
|
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1972 else if (char_I_actual_ppO2 < 203) |
| 0 | 1973 CNS_fraction += time_factor*0.00517; |
|
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1974 else if (char_I_actual_ppO2 < 233) |
| 0 | 1975 CNS_fraction += time_factor*0.0209; |
| 1976 else | |
| 1977 CNS_fraction += time_factor*0.0482; // value for 2.5 | |
| 1978 | |
| 1979 if( CNS_fraction > 9.99) | |
| 1980 CNS_fraction = 9.99; | |
| 1981 if( CNS_fraction < 0.0 ) | |
| 1982 CNS_fraction = 0.0; | |
| 1983 | |
| 1984 int_O_CNS_fraction = (unsigned int)(100.0 * CNS_fraction + 0.5); | |
| 1985 } | |
| 1986 | |
| 1987 ////////////////////////////////////////////////////////////////////////////// | |
| 1988 // deco_calc_CNS_planning | |
| 1989 // | |
| 1990 // Compute CNS during predicted ascent. | |
| 1991 // | |
| 1992 // Note: Needs a call to deco_push_tissues_to_vault(), | |
| 1993 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
| 1994 // | |
| 1995 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
| 1996 // Output: CNS_fraction, int_O_CNS_fraction | |
| 1997 // | |
| 1998 void deco_calc_CNS_planning(void) | |
| 1999 { | |
| 2000 overlay unsigned char backup_gas_last_depth; | |
| 2001 overlay unsigned char backup_gas_last_used; | |
| 2002 overlay unsigned short backup_dive_mins; | |
| 2003 overlay unsigned char backup_actual_ppO2; | |
| 2004 | |
| 2005 RESET_C_STACK | |
| 2006 | |
| 2007 // Backup state machine | |
| 2008 backup_gas_last_depth = sim_gas_last_depth; | |
| 2009 backup_gas_last_used = sim_gas_last_used; | |
| 2010 backup_dive_mins = sim_dive_mins; | |
| 2011 backup_actual_ppO2 = char_I_actual_ppO2; | |
| 2012 | |
| 2013 // Uses 1min CNS period: | |
| 2014 char_I_step_is_1min = 1; | |
| 2015 | |
| 2016 //---- Retrieve bottom Gas used, and set variables. | |
| 2017 sim_gas_last_used = char_I_first_gas; | |
| 2018 sim_gas_last_depth = 0; // Surface gas marker. | |
| 2019 gas_switch_set(); // Sets initial calc_N2/He_ratio | |
| 2020 | |
| 2021 //---- CCR mode : do the full TTS at once -------------------------------- | |
| 2022 if( char_I_const_ppO2 != 0 ) | |
| 2023 { | |
| 2024 overlay unsigned short t; // Needs 16bits here ! | |
| 2025 char_I_actual_ppO2 = char_I_const_ppO2; | |
| 2026 for(t=0; t<int_O_ascenttime; ++t) | |
| 2027 deco_calc_CNS_fraction(); | |
| 2028 } | |
| 2029 else //---- OC mode : have to follow all gas switches... ----------------- | |
| 2030 { | |
| 2031 overlay unsigned char i = 0; // Decostop loop counter | |
| 2032 overlay float actual_ppO2; | |
| 2033 overlay unsigned char time, t; | |
| 2034 | |
| 2035 //---- Ascent to surface delay | |
| 2036 // NOTE: count as if time is spent with bottom pressure, | |
| 2037 // AND the bottom gas | |
| 2038 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) | |
| 2039 * (1.0 - calc_N2_ratio - calc_He_ratio); | |
| 2040 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; | |
| 2041 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; | |
| 2042 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); | |
| 2043 | |
| 2044 // Ascent time (rounded up): | |
| 2045 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); | |
| 2046 | |
| 2047 for(t=0; t<time; ++t) | |
| 2048 { | |
| 2049 deco_calc_CNS_fraction(); | |
| 2050 sim_dive_mins++; | |
| 2051 } | |
| 2052 | |
| 2053 //---- Do all further stops ------------------------------------------ | |
| 2054 for(i=0; i<NUM_STOPS; ++i) | |
| 2055 { | |
| 111 | 2056 overlay unsigned char stop_gas; |
| 0 | 2057 |
| 2058 //---- Get next stop, possibly in reverse order ------------------ | |
| 2059 { | |
| 2060 time = char_O_deco_time[(NUM_STOPS-1)-i]; | |
| 2061 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i]; | |
| 111 | 2062 stop_gas = char_O_deco_gas[(NUM_STOPS-1)-i]; |
| 0 | 2063 } |
| 2064 if( time == 0 ) continue; | |
| 2065 | |
| 2066 //---- Gas Switch ? ---------------------------------------------- | |
| 111 | 2067 if( stop_gas != sim_gas_last_used ) |
| 0 | 2068 { |
| 111 | 2069 sim_gas_last_depth = deco_gas_change[stop_gas-1]; |
| 2070 sim_gas_last_used = stop_gas; | |
| 0 | 2071 gas_switch_set(); |
| 2072 } | |
| 2073 | |
| 2074 //---- Convert Depth and N2_ratio to ppO2 ------------------------ | |
| 2075 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) | |
| 2076 * (1.0 - calc_N2_ratio - calc_He_ratio); | |
| 2077 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; | |
| 2078 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; | |
| 2079 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); | |
| 2080 | |
| 2081 //---- Apply the stop | |
| 2082 for(t=0; t<time; ++t) | |
| 2083 { | |
| 2084 deco_calc_CNS_fraction(); | |
| 2085 sim_dive_mins++; | |
| 2086 } | |
| 2087 } | |
| 2088 } | |
| 2089 | |
| 2090 //---- Back to normal mode... -------------------------------------------- | |
| 2091 char_I_step_is_1min = 0; | |
| 2092 sim_gas_last_depth = backup_gas_last_depth; | |
| 2093 sim_gas_last_used = backup_gas_last_used; | |
| 2094 sim_dive_mins = backup_dive_mins; | |
| 2095 char_I_actual_ppO2 = backup_actual_ppO2; | |
| 2096 } | |
| 2097 | |
| 2098 ////////////////////////////////////////////////////////////////////////////// | |
| 2099 // deco_calc_CNS_decrease_15min | |
| 2100 // | |
| 2101 // new in v.101 | |
| 2102 // | |
| 2103 // calculates the half time of 90 minutes in 6 steps of 15 min | |
| 2104 // (Used in sleepmode, for low battery mode). | |
| 2105 // | |
| 2106 // Output: int_O_CNS_fraction | |
| 2107 // Uses and Updates: CNS_fraction | |
| 2108 // | |
| 2109 void deco_calc_CNS_decrease_15min(void) | |
| 2110 { | |
| 2111 RESET_C_STACK | |
| 2112 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); | |
| 2113 | |
| 2114 CNS_fraction = 0.890899 * CNS_fraction; | |
| 2115 int_O_CNS_fraction = (unsigned int)(CNS_fraction * 100.0 + 0.5); | |
| 2116 } | |
| 2117 | |
| 2118 ////////////////////////////////////////////////////////////////////////////// | |
| 2119 // deco_calc_percentage | |
| 2120 // | |
| 2121 // new in v.101 | |
| 2122 // | |
| 2123 // calculates int_I_temp * char_I_temp / 100 | |
| 2124 // output is int_I_temp | |
| 2125 // | |
| 2126 // Used to compute NoFly remaining time. | |
| 2127 // | |
| 2128 void deco_calc_percentage(void) | |
| 2129 { | |
| 2130 RESET_C_STACK | |
| 2131 | |
| 2132 assert( 60 <= char_I_temp && char_I_temp <= 100 ); | |
| 2133 assert( int_I_temp < 5760 ); // Less than 4 days = 96h... | |
| 2134 | |
| 2135 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); | |
| 2136 | |
| 2137 assert( int_I_temp < 5760 ); // Less than 96h too... | |
| 2138 } | |
| 2139 | |
| 2140 | |
| 2141 ////////////////////////////////////////////////////////////////////////////// | |
| 2142 // deco_gas_volumes | |
| 2143 // | |
| 2144 // new in v.111 | |
| 2145 // | |
| 2146 // calculates volumes for each gas. | |
| 2147 // | |
| 2148 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. | |
| 2149 // Gas list. | |
| 2150 // char_I_first_gas is the bottom gas. | |
| 2151 // decoplan (char_O_deco_depth, char_O_deco_time). | |
| 2152 // CF#54 == TRUE if shallowest stop first. | |
| 2153 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min. | |
| 2154 // CF#57 == deco liters/minutes (5 .. 50) or bar/min. | |
| 2155 // Output: int_O_gas_volumes[0..4] in litters * 0.1 | |
| 2156 // | |
| 2157 void deco_gas_volumes(void) | |
| 2158 { | |
| 2159 overlay float volumes[NUM_GAS]; | |
| 2160 overlay float bottom_usage, deco_usage; | |
| 2161 overlay unsigned char i, deepest_first; | |
| 2162 overlay unsigned char gas, depth; | |
|
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2163 overlay unsigned char lastGasStop = 255; |
| 0 | 2164 RESET_C_STACK |
| 2165 | |
| 2166 //---- initialize with bottom consumption -------------------------------- | |
| 2167 for(i=0; i<NUM_GAS; ++i) // Nothing yet... | |
| 2168 volumes[i] = 0.0; | |
| 2169 | |
| 2170 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); | |
| 2171 gas = char_I_first_gas - 1; | |
| 2172 | |
|
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2173 bottom_usage = 20; // In liter/minutes. |
| 0 | 2174 if( char_I_const_ppO2 == 0 && bottom_usage > 0.0 ) |
| 2175 volumes[gas] | |
| 2176 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
| 2177 * char_I_bottom_time // in minutes. | |
| 2178 * bottom_usage; // In liter/minutes. | |
| 2179 | |
| 2180 //---- Ascent usage ------------------------------------------------------ | |
|
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2181 deepest_first = 0; |
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2182 deco_usage = 20; // In liter/minutes. |
| 0 | 2183 |
| 2184 depth = char_I_bottom_depth; | |
| 2185 | |
| 2186 for(i=0; i<NUM_STOPS; ++i) | |
| 2187 { | |
| 2188 overlay unsigned char newDepth, time; | |
| 2189 | |
| 2190 // Manage stops in reverse order (CF#54) | |
| 2191 if( deepest_first ) | |
| 2192 { | |
| 2193 time = char_O_deco_time[i]; | |
| 2194 if( time == 0 ) break; // End of table: done. | |
| 2195 | |
| 111 | 2196 newDepth = char_O_deco_depth[i]; |
| 0 | 2197 } |
| 2198 else | |
| 2199 { | |
| 2200 time = char_O_deco_time[31-i]; | |
| 2201 if( time == 0 ) continue; // not yet: still search table. | |
| 2202 | |
| 111 | 2203 newDepth = char_O_deco_depth[31-i]; |
| 0 | 2204 } |
| 2205 | |
|
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2206 //---- Gas switch during or before this stop -------------------------- |
|
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2207 for(;;) |
| 0 | 2208 { |
| 2209 overlay unsigned char newGas = 0; | |
| 2210 overlay unsigned char newStop = 0; // NO CHANGE yet | |
| 2211 overlay unsigned char j; | |
| 2212 | |
| 2213 for(j=0; j<NUM_GAS; ++j) | |
| 2214 { | |
| 2215 // Skip gas without changing depth: | |
| 2216 if( ! char_I_deco_gas_change[j] ) | |
| 2217 continue; | |
|
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2218 // Select gas changed between [newDepth .. lastGasStop[ |
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2219 // Note that <= means changing gas at BEGINNING of this stop. |
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2220 // Note that < means we cant use the same gas twice |
| 0 | 2221 if( newDepth <= char_I_deco_gas_change[j] |
|
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2222 && char_I_deco_gas_change[j] < lastGasStop ) |
| 0 | 2223 { |
| 2224 // Keep the DEEPEST gas in that range: | |
| 2225 if( char_I_deco_gas_change[j] >= newStop ) | |
| 2226 { | |
| 2227 newGas = j; | |
| 2228 newStop = char_I_deco_gas_change[j]; | |
| 2229 } | |
| 2230 } | |
| 2231 } | |
| 2232 | |
|
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2233 // Did we find something ? |
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2234 if( !newStop ) |
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2235 break; |
| 0 | 2236 |
|
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2237 //---- usage BEFORE gas switch (if any), at 10m/min : |
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2238 if( deco_usage > 0.0 && depth > newStop ) |
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2239 // Plus usage during ascent to the next stop, at 10m/min. |
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2240 volumes[gas] += ((depth+newStop)*0.05 + 1.0) // average depth --> bar. |
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2241 * (depth-newStop)*0.1 // metre --> min |
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2242 * deco_usage; |
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2243 |
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2244 //---- Do gas switch: |
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2245 gas = newGas; |
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2246 |
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2247 lastGasStop = newStop; // Mark last used gas |
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2248 if( newStop < depth ) // ascent to gas switch, |
| 0 | 2249 depth = newStop; |
| 2250 } | |
| 2251 | |
|
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2252 //---- usage AFTER gas switch (if any), at 10m/min : |
| 0 | 2253 if( depth > newDepth ) |
| 2254 volumes[gas] += ((depth+newDepth)*0.05 + 1.0) // average depth --> bar. | |
| 2255 * (depth-newDepth)*0.1 // metre --> min | |
| 2256 * deco_usage; | |
| 2257 | |
|
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2258 //---- Do stop: |
| 0 | 2259 depth = newDepth; |
| 2260 | |
| 2261 // Usage at stop: | |
| 2262 if( deco_usage > 0.0 ) | |
| 2263 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. | |
| 2264 * time // in minutes. | |
| 2265 * deco_usage; // in xxx / min @ 1bar. | |
| 2266 else | |
| 2267 volumes[gas] = 65535.0; | |
| 2268 } | |
| 2269 | |
| 2270 // From last stop to surface | |
| 2271 if( deco_usage > 0.0 ) | |
| 2272 volumes[gas] += (depth*0.05 + 1.0) // avg depth --> bar. | |
| 2273 * depth * 0.1 // time to surface, in minutes. | |
| 2274 * deco_usage; // in xxx / min @ 1bar. | |
| 2275 | |
| 2276 //---- convert results for the ASM interface ----------------------------- | |
| 2277 for(i=0; i<NUM_GAS; ++i) | |
| 2278 if( volumes[i] > 65534.0 ) | |
| 2279 int_O_gas_volumes[i] = 65535; | |
| 2280 else | |
| 2281 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); | |
| 2282 } | |
| 2283 | |
| 2284 ////////////////////////////////////////////////////////////////////////////// | |
| 2285 | |
| 2286 void deco_push_tissues_to_vault(void) | |
| 2287 { | |
| 2288 overlay unsigned char x; | |
| 2289 RESET_C_STACK | |
| 2290 | |
| 2291 cns_vault = CNS_fraction; | |
| 2292 low_depth_vault = low_depth; | |
| 2293 | |
| 2294 for (x=0;x<NUM_COMP;x++) | |
| 2295 { | |
| 2296 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
| 2297 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
| 2298 } | |
| 2299 } | |
| 2300 | |
| 2301 void deco_pull_tissues_from_vault(void) | |
| 2302 { | |
| 2303 overlay unsigned char x; | |
| 2304 RESET_C_STACK | |
| 2305 | |
| 2306 for (x=0; x<NUM_COMP; x++) | |
| 2307 { | |
| 2308 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
| 2309 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
| 2310 } | |
| 2311 | |
| 2312 // Restore both CNS variable, too. | |
| 2313 CNS_fraction = cns_vault; | |
| 2314 int_O_CNS_fraction = (unsigned int)(CNS_fraction * 100.0 + 0.5); | |
| 2315 | |
| 2316 // GF history too: | |
| 2317 low_depth = low_depth_vault; | |
| 2318 locked_GF_step = GF_delta / low_depth; | |
| 2319 } | |
| 2320 | |
| 2321 ////////////////////////////////////////////////////////////////////////////// | |
| 2322 // | |
| 2323 #ifndef CROSS_COMPILE | |
| 2324 void main() {} | |
| 2325 #endif |