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annotate src/p2_deco.c @ 330:0532cac03ccd new_screen_layout
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| author | Janos Kovacs <kovjanos@gmail.com> |
|---|---|
| date | Wed, 24 Jun 2015 22:19:32 +0200 |
| parents | 0e9dcdcf03c1 |
| children | 7812ec7ef694 |
| 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). | |
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87 // 2013/05/08: [jDG] A. Salm remark: NOAA tables for CNS are in ATA, not bar. |
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88 // 2013/12/21: [jDG] Fix CNS calculation in decoplan w/o marked gas switch |
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89 // 2014/06/16: [jDG] Fix Helium diluant. Fix volumes with many travel mix. |
|
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90 // 2014/06/29: [mH] Compute int_O_ceiling |
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91 // 2015/06/12: [jDG] Fix NDL prediction while desaturating with the Buhlmann model. |
| 0 | 92 // |
| 93 // TODO: | |
| 94 // | |
| 95 // Literature: | |
| 313 | 96 // Buhlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
| 0 | 97 // 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 |
| 98 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
| 99 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
| 100 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
| 101 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
| 102 // | |
| 103 // | |
| 104 | |
| 105 // ********************* | |
| 106 // ** I N C L U D E S ** | |
| 107 // ********************* | |
| 108 #include <math.h> | |
| 109 | |
| 110 // *********************************************** | |
| 111 // ** V A R I A B L E S D E F I N I T I O N S ** | |
| 112 // *********************************************** | |
| 113 | |
| 114 #include "p2_definitions.h" | |
| 115 #define TEST_MAIN | |
| 116 #include "shared_definitions.h" | |
| 117 | |
| 118 // Water vapour partial pressure in the lumb. | |
| 119 #define ppWater 0.0627 | |
| 120 #define METER_TO_BAR 0.09985 | |
| 121 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
| 122 | |
| 123 // Surface security factor | |
| 124 #define SURFACE_DESAT_FACTOR 0.7042 | |
| 125 | |
| 126 // ************************* | |
| 127 // ** P R O T O T Y P E S ** | |
| 128 // ************************* | |
| 129 | |
| 130 static void calc_hauptroutine(void); | |
| 131 static void calc_nullzeit(void); | |
| 132 | |
| 133 static void calc_tissue(PARAMETER unsigned char period); | |
| 134 static void calc_limit(void); | |
| 135 | |
| 136 static void clear_tissue(void); | |
| 137 static void calc_ascenttime(void); | |
| 138 static void update_startvalues(void); | |
| 139 static void clear_deco_table(void); | |
| 140 static unsigned char update_deco_table(void); | |
| 141 | |
| 142 static void sim_tissue(PARAMETER unsigned char period); | |
| 143 static void sim_limit(PARAMETER float GF_current); | |
| 144 static void sim_extra_time(void); | |
| 145 static void calc_dive_interval(void); | |
| 146 | |
| 147 static void calc_gradient_factor(void); | |
| 148 static void calc_wo_deco_step_1_min(void); | |
| 149 | |
| 150 static void calc_hauptroutine_data_input(void); | |
| 151 static void calc_hauptroutine_update_tissues(void); | |
| 152 static void calc_hauptroutine_calc_deco(void); | |
| 153 static void sim_ascent_to_first_stop(void); | |
| 154 | |
| 155 static unsigned char gas_switch_deepest(void); | |
| 156 static void gas_switch_set(void); | |
| 157 | |
| 158 static unsigned char calc_nextdecodepth(void); | |
| 159 | |
| 160 //---- Bank 5 parameters ----------------------------------------------------- | |
| 161 #ifndef UNIX | |
| 162 # pragma udata bank5=0x500 | |
| 163 #endif | |
| 164 | |
| 165 static float GF_low; | |
| 166 static float GF_high; | |
| 167 static float GF_delta; | |
| 168 static float locked_GF_step; // GF_delta / low_depth | |
| 169 | |
| 170 static unsigned char temp_depth_limit; | |
| 171 static unsigned char low_depth; // Depth of deepest stop | |
| 172 | |
| 173 // Simulation context: used to predict ascent. | |
| 174 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 175 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 176 | |
| 177 // Real context: what we are doing now. | |
| 178 static float calc_lead_tissue_limit; // | |
| 179 | |
| 180 static unsigned char internal_deco_time[NUM_STOPS]; | |
| 181 static unsigned char internal_deco_depth[NUM_STOPS]; | |
| 182 | |
| 183 static float cns_vault; | |
| 184 static float low_depth_vault; | |
| 185 static float pres_tissue_N2_vault[NUM_COMP]; | |
| 186 static float pres_tissue_He_vault[NUM_COMP]; | |
| 187 | |
| 188 //---- Bank 6 parameters ----------------------------------------------------- | |
| 189 #ifndef UNIX | |
| 190 # pragma udata bank6=0x600 | |
| 191 #endif | |
| 192 | |
| 193 static unsigned char ci; | |
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194 static float pres_respiration; |
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195 static float pres_surface; |
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196 static float temp_deco; |
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197 static float ppN2; |
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198 static float ppHe; |
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199 static float temp_tissue; |
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200 static float N2_ratio; // Breathed gas nitrogen ratio. |
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201 static float He_ratio; // Breathed gas helium ratio. |
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202 static float var_N2_a; // Buhlmann a, for current N2 tissue. |
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203 static float var_N2_b; // Buhlmann b, for current N2 tissue. |
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204 static float var_He_a; // Buhlmann a, for current He tissue. |
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205 static float var_He_b; // Buhlmann b, for current He tissue. |
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206 static float var_N2_e; // Exposition, for current N2 tissue. |
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207 static float var_He_e; // Exposition, for current He tissue. |
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208 static float var_N2_ht; // Half-time for current N2 tissue. |
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209 static float var_He_ht; // Half-time for current N2 tissue. |
| 0 | 210 |
| 211 static float pres_diluent; // new in v.101 | |
| 212 static float const_ppO2; // new in v.101 | |
| 213 | |
| 214 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. | |
| 215 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
| 216 static unsigned short sim_dive_mins; // Simulated dive time. | |
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217 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
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218 static float calc_He_ratio; // Simulated (switched) helium ratio. |
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219 static float CNS_fraction; // new in v.101 |
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220 static float float_saturation_multiplier; // new in v.101 |
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221 static float float_desaturation_multiplier; // new in v.101 |
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222 static float float_deco_distance; // new in v.101 |
| 0 | 223 |
| 224 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 | |
| 111 | 225 static unsigned char internal_deco_gas [NUM_STOPS]; |
| 0 | 226 |
| 227 //---- Bank 7 parameters ----------------------------------------------------- | |
| 228 #ifndef UNIX | |
| 229 # pragma udata bank7=0x700 | |
| 230 #endif | |
|
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231 // Keep order of 0x700 variables |
| 0 | 232 float pres_tissue_N2[NUM_COMP]; |
| 233 float pres_tissue_He[NUM_COMP]; | |
| 234 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. | |
| 235 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
| 236 | |
| 237 //---- Bank 8 parameters ----------------------------------------------------- | |
| 238 #ifndef UNIX | |
| 239 # pragma udata overlay bank8=0x800 | |
| 240 static char md_pi_subst[256]; | |
| 241 # define C_STACK md_pi_subst // Overlay C-code data stack here, too. | |
| 242 #endif | |
| 243 | |
| 244 // Back to bank6 for further tmp data | |
| 245 #ifndef UNIX | |
| 246 # pragma udata bank6 | |
| 247 #endif | |
| 248 | |
| 249 ////////////////////////////////////////////////////////////////////////////// | |
| 250 ////////////////////////////////////////////////////////////////////////////// | |
| 251 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 252 ////////////////////////////////////////////////////////////////////////////// | |
| 253 ////////////////////////////////////////////////////////////////////////////// | |
| 254 // | |
| 255 // End of PROM code is 17F00, So push tables on PROM top... | |
| 256 // | |
| 257 #ifndef UNIX | |
| 258 # pragma romdata buhlmann_tables = 0x1DD00 // Needs to be in UPPER bank. | |
| 259 #endif | |
| 260 | |
| 261 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) | |
| 262 | |
| 263 ////////////////////////////////////////////////////////////////////////////// | |
| 264 ////////////////////////////////////////////////////////////////////////////// | |
| 265 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 266 ////////////////////////////////////////////////////////////////////////////// | |
| 267 ////////////////////////////////////////////////////////////////////////////// | |
| 268 // | |
| 269 // all new in v.102 | |
| 270 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 271 #ifndef UNIX | |
| 272 # pragma code p2_deco = 0x0C000 | |
| 273 #endif | |
| 274 | |
| 275 ////////////////////////////////////////////////////////////////////////////// | |
| 276 ////////////////////////////////////////////////////////////////////////////// | |
| 277 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 278 ////////////////////////////////////////////////////////////////////////////// | |
| 279 ////////////////////////////////////////////////////////////////////////////// | |
| 280 | |
| 281 ////////////////////////////////////////////////////////////////////////////// | |
| 282 // Bump to blue-screen when an assert is wrong | |
| 283 #ifdef __DEBUG | |
| 284 void assert_failed(PARAMETER short int line) | |
| 285 { | |
| 286 } | |
| 287 #endif | |
| 288 | |
| 289 ////////////////////////////////////////////////////////////////////////////// | |
| 290 // When calling C code from ASM context, the data stack pointer and | |
| 291 // frames should be reset. Bank8 is used by stack | |
| 292 | |
| 293 #ifdef CROSS_COMPILE | |
| 294 # define RESET_C_STACK | |
| 295 #else | |
| 296 # ifdef __DEBUG | |
| 297 # define RESET_C_STACK fillDataStack(); | |
| 298 void fillDataStack(void) | |
| 299 { | |
| 300 _asm | |
| 301 LFSR 1,C_STACK | |
| 302 MOVLW 0xCC | |
| 303 loop: MOVWF POSTINC1,0 | |
| 304 TSTFSZ FSR1L,0 | |
| 305 BRA loop | |
| 306 | |
| 307 LFSR 1,C_STACK | |
| 308 LFSR 2,C_STACK | |
| 309 _endasm | |
| 310 } | |
| 311 # else | |
| 312 # define RESET_C_STACK \ | |
| 313 _asm \ | |
| 314 LFSR 1, C_STACK \ | |
| 315 LFSR 2, C_STACK \ | |
| 316 _endasm | |
| 317 # endif | |
| 318 #endif | |
| 319 | |
| 320 ////////////////////////////////////////////////////////////////////////////// | |
| 321 // Fast subroutine to read timer 5. | |
| 313 | 322 // Note: result is in 1/32 of msecs (30,51757813 us/bit to be precise) |
| 0 | 323 static unsigned short tmr5(void) |
| 324 { | |
| 325 #ifndef CROSS_COMPILE | |
| 326 _asm | |
| 327 movff 0xf7c,PRODL // TMR5L | |
| 328 movff 0xf7d,PRODH // TMR5H | |
| 329 _endasm // result in PRODH:PRODL. | |
| 330 #else | |
| 331 return 0; | |
| 332 #endif | |
| 333 } | |
| 334 | |
| 335 | |
| 336 ////////////////////////////////////////////////////////////////////////////// | |
| 337 // read buhlmann tables A and B for compatriment ci | |
| 338 // | |
| 339 static void read_buhlmann_coefficients(void) | |
| 340 { | |
| 341 #ifndef CROSS_COMPILE | |
| 342 // Note: we don't use far rom pointer, because the | |
| 343 // 24 bits is too complex, hence we have to set | |
| 344 // the UPPER page ourself... | |
| 345 // --> Set zero if tables are moved to lower pages ! | |
| 346 _asm | |
| 347 movlw 1 | |
| 348 movwf TBLPTRU,0 | |
| 349 _endasm | |
| 350 #endif | |
| 351 | |
| 352 assert( ci < NUM_COMP ); | |
| 353 | |
| 354 // Use an interleaved array (AoS) to access coefficients with a | |
| 355 // single addressing. | |
| 356 { | |
| 357 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
| 358 var_N2_a = *ptr++; | |
| 359 var_N2_b = *ptr++; | |
| 360 var_He_a = *ptr++; | |
| 361 var_He_b = *ptr++; | |
| 362 } | |
| 363 } | |
| 364 | |
| 365 ////////////////////////////////////////////////////////////////////////////// | |
| 366 // read buhlmann tables for compatriment ci | |
| 367 // If period == 0 : 2sec interval | |
| 368 // 1 : 1 min interval | |
| 369 // 2 : 10 min interval. | |
| 370 static void read_buhlmann_times(PARAMETER char period) | |
| 371 { | |
| 372 #ifndef CROSS_COMPILE | |
| 373 // Note: we don't use far rom pointer, because the | |
| 374 // 24 bits is to complex, hence we have to set | |
| 375 // the UPPER page ourself... | |
| 376 // --> Set zero if tables are moved to lower pages ! | |
| 377 _asm | |
| 378 movlw 1 | |
| 379 movwf TBLPTRU,0 | |
| 380 _endasm | |
| 381 #endif | |
| 382 | |
| 383 assert( ci < NUM_COMP ); | |
| 384 | |
| 385 // Integration intervals. | |
| 386 switch(period) | |
| 387 { | |
| 388 case 0: //---- 2 sec ----------------------------------------------------- | |
| 389 { | |
| 390 overlay rom const float* ptr = &e2secs[2*ci]; | |
| 391 var_N2_e = *ptr++; | |
| 392 var_He_e = *ptr++; | |
| 393 } | |
| 394 break; | |
| 395 | |
| 396 case 1: //---- 1 min ----------------------------------------------------- | |
| 397 { | |
| 398 overlay rom const float* ptr = &e1min[2*ci]; | |
| 399 var_N2_e = *ptr++; | |
| 400 var_He_e = *ptr++; | |
| 401 } | |
| 402 break; | |
| 403 | |
| 404 case 2: //---- 10 min ---------------------------------------------------- | |
| 405 { | |
| 406 overlay rom const float* ptr = &e10min[2*ci]; | |
| 407 var_N2_e = *ptr++; | |
| 408 var_He_e = *ptr++; | |
| 409 } | |
| 410 break; | |
| 411 | |
| 412 default: | |
| 413 assert(0); // Never go there... | |
| 414 } | |
| 415 } | |
| 416 | |
| 417 ////////////////////////////////////////////////////////////////////////////// | |
| 418 // read buhlmann tables for compatriment ci | |
| 419 // | |
| 420 static void read_buhlmann_ht(void) | |
| 421 { | |
| 422 | |
| 423 #ifndef CROSS_COMPILE | |
| 424 // Note: we don't use far rom pointer, because the | |
| 425 // 24 bits is to complex, hence we have to set | |
| 426 // the UPPER page ourself... | |
| 427 // --> Set zero if tables are moved to lower pages ! | |
| 428 _asm | |
| 429 movlw 1 | |
| 430 movwf TBLPTRU,0 | |
| 431 _endasm | |
| 432 #endif | |
| 433 | |
| 434 assert( ci < NUM_COMP ); | |
| 435 { | |
| 436 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
| 437 var_N2_ht = *ptr++; | |
| 438 var_He_ht = *ptr++; | |
| 439 } | |
| 440 | |
| 441 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
| 442 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
| 443 } | |
| 444 | |
| 445 ////////////////////////////////////////////////////////////////////////////// | |
| 446 // calc_nextdecodepth | |
| 447 // | |
| 448 // new in v.102 | |
| 449 // | |
| 450 // INPUT, changing during dive: | |
| 451 // temp_deco | |
| 452 // low_depth | |
| 453 // | |
| 454 // INPUT, fixed during dive: | |
| 455 // pres_surface | |
| 456 // GF_delta | |
| 457 // GF_high | |
| 458 // GF_low | |
| 459 // char_I_depth_last_deco | |
| 460 // float_deco_distance | |
| 461 // | |
| 462 // RETURN TRUE iff a stop is needed. | |
| 463 // | |
| 464 // OUTPUT | |
| 465 // locked_GF_step | |
| 466 // temp_depth_limt | |
| 467 // low_depth | |
| 468 // | |
| 469 static unsigned char calc_nextdecodepth(void) | |
| 470 { | |
| 471 //--- Max ascent speed --------------------------------------------------- | |
| 472 // Recompute leading gas limit, at current depth: | |
| 473 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; | |
| 474 | |
| 475 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 476 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; | |
| 477 | |
| 478 // Do we need to stop at current depth ? | |
| 479 overlay unsigned char need_stop = 0; | |
| 480 | |
| 481 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 482 | |
| 483 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ | |
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484 if( char_I_deco_model != 0 ) |
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485 { |
| 0 | 486 overlay unsigned char first_stop = 0; |
| 487 overlay float p; | |
| 488 | |
| 489 sim_limit( GF_low ); | |
| 490 p = sim_lead_tissue_limit - pres_surface; | |
| 491 if( p <= 0.0f ) | |
| 492 goto no_deco_stop; // We can surface directly... | |
| 493 | |
| 494 p *= BAR_TO_METER; | |
| 495 if( p < min_depth ) | |
| 496 goto no_deco_stop; // First stop is higher than 1' ascent. | |
| 497 | |
| 498 first_stop = 3 * (short)(0.99999 + p*0.333333); | |
| 499 assert( first_stop < 128 ); | |
| 500 | |
| 501 // Apply correction for the shallowest stop. | |
| 502 if( first_stop == 3 ) // new in v104 | |
| 503 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 504 | |
| 505 // Store the deepest point needing a deco stop as the LOW reference for GF. | |
| 506 // NOTE: following stops will be validated using this LOW-HIGH gf scale, | |
| 507 // so if we want to keep coherency, we should not validate this stop | |
| 508 // yet, but apply the search to it, as for all the following stops afterward. | |
| 509 if( first_stop > low_depth ) | |
| 510 { | |
| 511 low_depth = first_stop; | |
| 512 locked_GF_step = GF_delta / first_stop; | |
| 513 } | |
| 514 | |
| 515 // We have a stop candidate. | |
| 516 // But maybe ascending to the next stop will diminish the constraint, | |
| 517 // because the GF might decrease more than the preassure gradient... | |
| 518 while(first_stop > 0) | |
| 519 { | |
| 520 overlay unsigned char next_stop; // Next depth (0..90m) | |
| 521 overlay float pres_stop; // Next pressure (bar) | |
| 522 | |
| 523 // Check max speed, or reaching surface. | |
| 524 if( first_stop <= min_depth ) | |
| 525 goto no_deco_stop; | |
| 526 | |
| 527 if( first_stop <= char_I_depth_last_deco ) // new in v104 | |
| 528 next_stop = 0; | |
| 529 else if( first_stop == 6 ) | |
| 530 next_stop = char_I_depth_last_deco; | |
| 531 else | |
| 532 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 533 | |
| 534 // Just a check we are indeed above LOW ref. | |
| 535 assert( next_stop < low_depth ); | |
| 536 | |
| 537 // Total preassure at the new stop candidate: | |
| 538 pres_stop = next_stop * METER_TO_BAR | |
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539 + pres_surface; |
| 0 | 540 |
| 541 // Keep GF_low until a first stop depth is found: | |
| 542 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 543 | |
| 544 // Check upper limit (lowest pressure tolerated): | |
| 545 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 546 goto deco_stop_found; | |
| 547 | |
| 548 // Else, validate that stop and loop... | |
| 549 first_stop = next_stop; | |
| 550 } | |
| 551 assert( first_stop == 0 ); | |
| 552 | |
| 553 no_deco_stop: | |
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554 temp_depth_limit = min_depth; |
| 0 | 555 goto done; |
| 556 | |
| 557 // next stop is the last validated depth found, aka first_stop | |
| 558 deco_stop_found: | |
| 559 need_stop = 1; // Hit. | |
| 560 temp_depth_limit = first_stop; // Stop depth, in meter. | |
| 561 | |
| 562 done: | |
| 563 ; | |
| 564 } | |
| 565 else //---- ZH-L16 model ------------------------------------------------- | |
| 566 { | |
| 567 overlay float pres_gradient; | |
| 568 | |
| 569 // Original model | |
| 570 // optimized in v.101 | |
| 571 // char_I_depth_last_deco included in v.101 | |
| 572 | |
| 573 // Compute sim_lead_tissue_limit too, but just once. | |
| 574 sim_limit(1.0); | |
| 575 | |
| 576 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 577 if (pres_gradient >= 0) | |
| 578 { | |
| 579 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; | |
| 580 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco | |
| 581 need_stop = 1; // Hit. | |
| 582 | |
| 583 // Implement last stop at 4m/5m/6m... | |
| 584 if( temp_depth_limit == 3 ) | |
| 585 temp_depth_limit = char_I_depth_last_deco; | |
| 586 } | |
| 587 else | |
| 588 temp_depth_limit = 0; | |
| 589 } | |
| 590 | |
| 591 //---- Check gas change -------------------------------------------------- | |
| 592 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, | |
| 593 | |
| 594 return need_stop; | |
| 595 } | |
| 596 | |
| 597 ////////////////////////////////////////////////////////////////////////////// | |
| 598 // copy_deco_table | |
| 599 // | |
| 600 // Buffer the stops, once computed, so we can continue to display them | |
| 601 // while computing the next set. | |
| 602 // | |
| 603 static void copy_deco_table(void) | |
| 604 { | |
| 605 // Copy depth of the first (deepest) stop, because when reversing | |
| 606 // order, it will be hard to find... | |
| 111 | 607 char_O_first_deco_depth = internal_deco_depth[0]; |
| 0 | 608 char_O_first_deco_time = internal_deco_time [0]; |
| 609 | |
| 610 { | |
| 611 overlay unsigned char x, y; | |
| 612 | |
| 613 for(x=0; x<NUM_STOPS; x++) | |
| 614 { | |
| 615 char_O_deco_depth[x] = internal_deco_depth[x]; | |
| 616 char_O_deco_time [x] = internal_deco_time [x]; | |
| 111 | 617 char_O_deco_gas [x] = internal_deco_gas [x]; |
| 0 | 618 } |
| 619 | |
| 620 //Now fill the char_O_deco_time_for_log array | |
| 621 //---- First: search the first non-null depth | |
| 622 for(x=(NUM_STOPS-1); x != 0; --x) | |
| 623 if( internal_deco_depth[x] != 0 ) break; | |
| 624 | |
| 625 //---- Second: copy to output table (in reverse order) | |
| 626 for(y=0; y<NUM_STOPS; y++, --x) | |
| 627 { | |
| 628 char_O_deco_time_for_log[y] = internal_deco_time [x]; | |
| 629 | |
| 630 // Stop only once the last transfer is done. | |
| 631 if( x == 0 ) break; | |
| 632 } | |
| 633 | |
| 634 //---- Third: fill table end with null | |
| 635 for(y++; y<NUM_STOPS; y++) | |
| 636 { | |
| 637 char_O_deco_time_for_log [y] = 0; | |
| 638 } | |
| 639 } | |
| 640 } | |
| 641 | |
| 642 ////////////////////////////////////////////////////////////////////////////// | |
| 643 // temp_tissue_safety // | |
| 644 // | |
| 645 // outsourced in v.102 | |
| 646 // | |
| 647 // Apply safety factors for brand ZH-L16 model. | |
| 648 // | |
| 649 static void temp_tissue_safety(void) | |
| 650 { | |
| 651 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); | |
| 652 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 653 | |
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654 if( char_I_deco_model == 0 ) |
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655 { |
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656 if( temp_tissue < 0.0 ) |
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657 temp_tissue *= float_desaturation_multiplier; |
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658 else |
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659 temp_tissue *= float_saturation_multiplier; |
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660 } |
| 0 | 661 } |
| 662 | |
| 663 ////////////////////////////////////////////////////////////////////////////// | |
| 664 ////////////////////////////////////////////////////////////////////////////// | |
| 665 // ** THE JUMP-IN CODE ** | |
| 666 // ** for the asm code ** | |
| 667 ////////////////////////////////////////////////////////////////////////////// | |
| 668 ////////////////////////////////////////////////////////////////////////////// | |
| 669 | |
| 670 ////////////////////////////////////////////////////////////////////////////// | |
| 671 // Called every 2 seconds during diving. | |
| 672 // update tissues every time. | |
| 673 // | |
| 674 // Every 6 seconds (or slower when TTS > 16): | |
| 675 // - update deco table (char_O_deco_time/depth) with new values. | |
| 676 // - update ascent time, | |
| 677 // - set status to zero (so we can check there is new results). | |
| 678 // | |
| 679 void deco_calc_hauptroutine(void) | |
| 680 { | |
| 681 RESET_C_STACK | |
| 682 calc_hauptroutine(); | |
| 683 int_O_desaturation_time = 65535; | |
| 684 } | |
| 685 | |
| 686 ////////////////////////////////////////////////////////////////////////////// | |
| 687 // Reset decompression model: | |
| 688 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 689 // + Reset last stop to 0m | |
| 690 // + Reset all model output. | |
| 691 void deco_clear_tissue(void) | |
| 692 { | |
| 693 RESET_C_STACK | |
| 694 clear_tissue(); | |
| 695 } | |
| 696 | |
| 697 ////////////////////////////////////////////////////////////////////////////// | |
| 698 // Called every 1 min during decoplanning. | |
| 699 // Update tissues for 1 min. | |
| 700 // | |
| 701 void deco_calc_tissue(void) | |
| 702 { | |
| 703 RESET_C_STACK | |
| 704 calc_hauptroutine_update_tissues(); | |
| 705 } | |
| 706 | |
| 707 ////////////////////////////////////////////////////////////////////////////// | |
| 708 | |
| 709 void deco_calc_wo_deco_step_1_min(void) | |
| 710 { | |
| 711 RESET_C_STACK | |
| 712 calc_wo_deco_step_1_min(); | |
| 713 deco_calc_desaturation_time(); | |
| 714 } | |
| 715 | |
| 716 ////////////////////////////////////////////////////////////////////////////// | |
| 717 | |
| 718 void deco_calc_dive_interval(void) | |
| 719 { | |
| 720 RESET_C_STACK | |
| 721 calc_dive_interval(); | |
| 722 } | |
| 723 | |
| 724 ////////////////////////////////////////////////////////////////////////////// | |
| 725 // Find current gas in the list (if any). | |
| 726 // | |
| 727 // Input: char_I_current_gas = 1..6 | |
| 728 // | |
| 729 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. | |
| 730 // | |
| 731 static void gas_switch_find_current(void) | |
| 732 { | |
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733 assert( 0 < char_I_current_gas && char_I_current_gas <= (2*NUM_GAS) ); |
| 0 | 734 |
| 735 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 | |
| 736 { | |
| 737 sim_gas_last_used = char_I_current_gas; | |
| 738 | |
| 739 // Note: if current is first gas, we must find it, but not set | |
| 740 // last depth change to surface. | |
| 741 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
| 742 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
| 743 } | |
| 744 else | |
| 745 sim_gas_last_used = 0; // Gas 6 = manual set | |
| 746 } | |
| 747 | |
| 748 ////////////////////////////////////////////////////////////////////////////// | |
| 749 // Find deepest available gas. | |
| 750 // | |
| 751 // Input: temp_depth_limit, | |
| 752 // deco_gas_change[] | |
| 753 // sim_gas_depth_used, sim_dive_mins. | |
| 754 // | |
| 755 // RETURNS TRUE if a stop is needed for gas switch. | |
| 756 // | |
| 757 // Output: temp_depth_limit, sim_gas_depth_used IFF the is a switch. | |
| 758 // | |
| 759 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used | |
| 760 // are null), or during the ascent to make sure we are not passing a | |
| 761 // stop (in which case both can be already set). | |
| 762 // | |
| 763 static unsigned char gas_switch_deepest(void) | |
| 764 { | |
| 765 overlay unsigned char switch_deco = 0, switch_last = 0; | |
| 766 | |
| 767 if (char_I_const_ppO2 == 0) | |
| 768 { | |
| 769 overlay unsigned char j; | |
| 770 | |
| 771 // Loop over all enabled gas, to find the deepest one, | |
| 772 // above last used gas, but below temp_depth_limit. | |
| 773 for(j=0; j<NUM_GAS; ++j) | |
| 774 { | |
| 775 // Gas not (yet) allowed ? Skip ! | |
| 776 if( temp_depth_limit > deco_gas_change[j] ) | |
| 777 continue; | |
| 778 | |
| 779 // Gas deeper (or equal) than the current one ? Skip ! | |
| 780 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) | |
| 781 continue; | |
| 782 | |
| 783 // First, or deeper ? | |
| 784 if( switch_deco < deco_gas_change[j] ) | |
| 785 { | |
| 786 switch_deco = deco_gas_change[j]; | |
| 787 switch_last = j+1; // 1..5 | |
| 788 } | |
| 789 } | |
| 790 } | |
| 791 | |
| 792 // If there is a better gas available | |
| 793 if( switch_deco ) | |
| 794 { | |
| 795 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); | |
| 796 | |
| 797 sim_gas_last_depth = switch_deco; | |
| 798 sim_gas_last_used = switch_last; | |
| 799 return 0; | |
| 800 } | |
| 801 return 0; | |
| 802 } | |
| 803 | |
| 804 ////////////////////////////////////////////////////////////////////////////// | |
| 805 // Calculate gas switches | |
| 806 // | |
| 807 // | |
| 808 // Input: N2_ratio, He_ratio. | |
| 809 // sim_gas_last_used | |
| 810 // | |
| 811 // Output: calc_N2_ratio, calc_He_ratio | |
| 812 // | |
| 813 static void gas_switch_set(void) | |
| 814 { | |
| 815 assert( sim_gas_last_used <= NUM_GAS ); | |
| 816 | |
| 817 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. | |
| 818 { | |
| 819 calc_N2_ratio = N2_ratio; | |
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820 calc_He_ratio = He_ratio; |
| 0 | 821 } |
| 822 else | |
| 823 { | |
| 824 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
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825 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; |
| 0 | 826 } |
| 827 | |
| 828 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
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829 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 1.00 ); |
| 0 | 830 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); |
| 831 } | |
| 832 | |
| 833 ////////////////////////////////////////////////////////////////////////////// | |
| 834 // | |
| 835 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. | |
| 836 // temp_deco : simulated respiration pressure | |
| 837 // float_deco_distance : security factor. | |
| 838 // Water-vapor pressure inside limbs (ppWater). | |
| 839 // | |
| 840 // Output: ppN2, ppHe. | |
| 841 // | |
| 842 static void sim_alveolar_presures(void) | |
| 843 { | |
| 844 overlay float deco_diluent = temp_deco; // new in v.101 | |
| 845 | |
| 846 // Take deco offset into account, but not at surface. | |
| 847 // Note: this should be done on ambiant pressure, hence before | |
| 848 // computing the diluant partial pressure... | |
| 849 if( deco_diluent > pres_surface ) | |
| 850 deco_diluent += float_deco_distance; | |
| 851 | |
| 852 //---- CCR mode : deco gas switch ? -------------------------------------- | |
| 853 if( char_I_const_ppO2 != 0 ) | |
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854 { |
| 0 | 855 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
| 856 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
| 857 // ppWater in the equations below: | |
| 858 deco_diluent -= const_ppO2; | |
| 859 deco_diluent /= calc_N2_ratio + calc_He_ratio; | |
| 860 | |
| 861 if (deco_diluent > temp_deco) | |
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862 deco_diluent = temp_deco; |
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863 } |
| 0 | 864 |
| 865 if( deco_diluent > ppWater ) | |
| 866 { | |
| 867 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); | |
| 868 ppHe = calc_He_ratio * (deco_diluent - ppWater); | |
| 869 } | |
| 870 else | |
| 871 { | |
| 872 ppN2 = 0.0; | |
| 873 ppHe = 0.0; | |
| 874 } | |
| 875 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); | |
| 876 assert( 0.0 <= ppHe && ppHe < 14.0 ); | |
| 877 } | |
| 878 | |
| 879 ////////////////////////////////////////////////////////////////////////////// | |
| 880 // clear_tissue | |
| 881 // | |
| 882 // optimized in v.101 (var_N2_a) | |
| 883 // | |
| 884 // preload tissues with standard pressure for the given ambient pressure. | |
| 885 // Note: fixed N2_ratio for standard air. | |
| 886 // | |
| 887 static void clear_tissue(void) | |
| 888 { | |
| 889 overlay float p; | |
| 890 | |
| 891 // Kludge: the 0.0002 of 0.7902 are missing with standard air. | |
| 892 N2_ratio = 0.7902; | |
| 893 pres_respiration = int_I_pres_respiration * 0.001; | |
| 894 | |
| 895 p = N2_ratio * (pres_respiration - ppWater); | |
| 896 for(ci=0; ci<NUM_COMP; ci++) | |
| 897 { | |
| 313 | 898 // cycle through the 16 Buhlmann N2 tissues |
| 0 | 899 pres_tissue_N2[ci] = p; |
| 900 | |
| 313 | 901 // cycle through the 16 Buhlmann tissues for Helium |
| 0 | 902 pres_tissue_He[ci] = 0.0; |
| 903 } | |
| 904 | |
| 905 clear_deco_table(); | |
| 906 char_O_deco_status = 0; | |
| 907 char_O_nullzeit = 0; | |
| 908 int_O_ascenttime = 0; | |
| 909 char_O_gradient_factor = 0; | |
| 910 char_O_relative_gradient_GF = 0; | |
| 911 | |
| 912 calc_lead_tissue_limit = 0.0; | |
| 913 char_O_gtissue_no = 0; | |
| 914 } | |
| 915 | |
| 916 ////////////////////////////////////////////////////////////////////////////// | |
| 917 // calc_hauptroutine | |
| 918 // | |
| 919 // this is the major code in dive mode calculates: | |
| 920 // the tissues, | |
| 921 // the bottom time, | |
| 922 // and simulates the ascend with all deco stops. | |
| 923 // | |
| 924 // The deco_state sequence is : | |
| 925 // 3 (at surface) | |
| 926 // +---> 0 : calc nullzeit | |
| 927 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 928 // | +-> 1 : simulate up to 16min of stops. | |
| 929 // | +------< not finished | |
| 930 // +--------< finish | |
| 931 // | |
| 932 // Added steps 6,5 for @+5 calculation: | |
| 933 // 6 = ascent to first stop (same as 2), except continue to 7 | |
| 934 // 7 = same as 1, except loop to 7. | |
| 935 // | |
| 936 static void calc_hauptroutine(void) | |
| 937 { | |
| 938 static unsigned char backup_gas_used; | |
| 939 static unsigned char backup_gas_depth; | |
| 940 | |
| 941 calc_hauptroutine_data_input(); | |
| 942 | |
| 943 calc_hauptroutine_update_tissues(); | |
| 944 calc_gradient_factor(); | |
| 945 | |
| 946 // toggle between calculation for nullzeit (bottom time), | |
| 947 // deco stops | |
| 948 // and more deco stops (continue) | |
| 949 switch( char_O_deco_status ) | |
| 950 { | |
| 951 case 3: //---- At surface: start a new dive ------------------------------ | |
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952 clear_deco_table(); |
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953 copy_deco_table(); |
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954 int_O_ascenttime = 0; // Reset DTR. |
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955 int_O_extra_ascenttime = 0; |
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956 char_O_nullzeit = 0; // Reset bottom time. |
| 0 | 957 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
| 958 | |
| 959 // Values that should be reset just once for the full real dive. | |
| 960 // This is used to record the lowest stop for the whole dive, | |
| 961 // Including ACCROSS all simulated ascent. | |
| 962 low_depth = 0; | |
| 963 locked_GF_step = 0.0; | |
| 964 | |
| 965 // Reset gas switch history. | |
| 966 backup_gas_used = sim_gas_last_used = 0; | |
| 967 backup_gas_depth = sim_gas_last_depth = 0; | |
| 968 sim_dive_mins = 0; | |
| 969 break; | |
| 970 | |
| 971 case 0: //---- bottom time ----------------------------------------------- | |
| 972 default: | |
| 973 gas_switch_find_current(); // Lookup for current gas & time. | |
| 974 gas_switch_set(); // setup calc_ratio's | |
| 975 | |
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976 calc_nullzeit(); |
| 0 | 977 if( char_O_nullzeit > 0 ) // Some NDL time left ? |
| 978 { | |
| 979 char_O_deco_status = 0; // YES: recalc ndl next time. | |
| 980 clear_deco_table(); // Also clear stops ! | |
| 981 copy_deco_table(); | |
| 982 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) | |
| 983 } | |
| 984 else | |
| 985 char_O_deco_status = 2; // NO: calc ascent next time. | |
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986 break; |
| 0 | 987 |
| 988 case 2: //---- Simulate ascent to first stop ----------------------------- | |
| 989 case 6: // @+5min variation | |
| 990 // Check proposed gas at begin of ascent simulation | |
| 991 sim_dive_mins = int_I_divemins; // Init current time. | |
| 992 | |
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993 gas_switch_find_current(); // Lookup for current gas & time. |
| 0 | 994 gas_switch_set(); // setup calc_ratio's |
| 995 | |
| 996 backup_gas_used = sim_gas_last_used; // And save for later simu steps. | |
| 997 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. | |
| 998 | |
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999 sim_ascent_to_first_stop(); |
| 0 | 1000 |
| 1001 // Calc stops next time (deco or gas switch). | |
| 1002 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); | |
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1003 break; |
| 0 | 1004 |
| 1005 case 1: //---- Simulate stops -------------------------------------------- | |
| 1006 case 5: // @+5 variation. | |
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1007 calc_hauptroutine_calc_deco(); |
| 0 | 1008 |
| 1009 // If simulation is finished, restore the GF low reference, so that | |
| 1010 // next ascent simulation is done from the current depth: | |
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1011 if( (char_O_deco_status & 3) == 0 ) |
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1012 { |
| 0 | 1013 sim_gas_last_used = backup_gas_used; |
| 1014 sim_gas_last_depth = backup_gas_depth; | |
| 1015 } | |
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1016 break; |
| 0 | 1017 } |
| 1018 } | |
| 1019 | |
| 1020 ////////////////////////////////////////////////////////////////////////////// | |
| 1021 // calc_hauptroutine_data_input | |
| 1022 // | |
| 1023 // Reset all C-code dive parameters from their ASM-code values. | |
| 1024 // Detect gas change condition. | |
| 1025 // | |
| 1026 void calc_hauptroutine_data_input(void) | |
| 1027 { | |
| 1028 overlay short int_temp; | |
| 1029 overlay unsigned char g; | |
| 1030 | |
| 1031 pres_respiration = int_I_pres_respiration * 0.001; | |
| 1032 pres_surface = int_I_pres_surface * 0.001; | |
| 1033 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1034 He_ratio = char_I_He_ratio * 0.01; | |
| 313 | 1035 float_deco_distance = char_I_deco_distance * 0.01; // Get offset in BAR |
| 0 | 1036 |
| 1037 // ____________________________________________________ | |
| 1038 // | |
| 1039 // _____________ G A S _ C H A N G E S ________________ | |
| 1040 // ____________________________________________________ | |
| 1041 | |
| 1042 // Keep a margin of 150mbar = 1.50m | |
| 1043 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1044 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 1045 | |
| 1046 // Gas are selectable if we did not pass the change depth by more than 1.50m: | |
| 1047 for(g=0; g < NUM_GAS; ++g) | |
| 1048 { | |
| 1049 deco_gas_change[g] = 0; | |
| 1050 if(char_I_deco_gas_change[g]) | |
| 1051 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) | |
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1052 deco_gas_change[g] = char_I_deco_gas_change[g]; |
| 0 | 1053 } |
| 1054 | |
| 1055 const_ppO2 = char_I_const_ppO2 * 0.01; | |
| 1056 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1057 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1058 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1059 GF_high = char_I_GF_High_percentage * 0.01; | |
| 1060 GF_delta = GF_high - GF_low; | |
| 1061 } | |
| 1062 | |
| 1063 ////////////////////////////////////////////////////////////////////////////// | |
| 1064 // | |
| 1065 // | |
| 1066 void calc_hauptroutine_update_tissues(void) | |
| 1067 { | |
| 1068 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); | |
| 1069 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
|
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1070 assert( (N2_ratio + He_ratio) <= 1.00 ); |
| 0 | 1071 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 1072 | |
| 1073 pres_diluent = pres_respiration; | |
| 1074 if( char_I_const_ppO2 != 0 ) | |
| 1075 { | |
| 1076 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); | |
| 1077 | |
| 1078 pres_diluent -= const_ppO2; | |
| 1079 pres_diluent /= N2_ratio + He_ratio; | |
| 1080 if( pres_diluent < 0.0 ) | |
| 1081 pres_diluent = 0.0; | |
| 1082 if( pres_diluent > pres_respiration ) | |
| 1083 pres_diluent = pres_respiration; | |
| 1084 | |
| 1085 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); | |
| 1086 | |
| 1087 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; | |
| 1088 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; | |
| 1089 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
| 1090 } | |
| 1091 | |
| 1092 if( pres_diluent > ppWater ) | |
| 1093 { | |
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1094 overlay float EAD, END; |
| 0 | 1095 |
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1096 ppN2 = N2_ratio * (pres_diluent - ppWater); |
| 0 | 1097 ppHe = He_ratio * (pres_diluent - ppWater); |
| 1098 | |
| 1099 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
| 1100 // with plain air. | |
| 1101 // ppN2 = 79% * (P_EAD - ppWater) | |
| 1102 // EAD = (P_EAD - Psurface) * 10 | |
| 1103 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 | |
| 1104 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; | |
| 1105 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; | |
| 1106 char_O_EAD = (unsigned char)(EAD + 0.5); | |
| 1107 | |
| 1108 // END : Equivalent Narcotic Dive. | |
| 1109 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
| 1110 // 0.23 btw). Hence the formula becomes: | |
| 1111 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater | |
| 1112 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER | |
| 1113 // | |
| 1114 // Source cited: | |
| 1115 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
| 1116 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
| 1117 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; | |
| 1118 if( END < 0.0 || END > 245.5 ) END = 0.0; | |
| 1119 char_O_END = (unsigned char)(END + 0.5); | |
| 1120 } | |
| 1121 else // new in v.101 | |
| 1122 { | |
| 1123 ppN2 = 0.0; | |
| 1124 ppHe = 0.0; | |
| 1125 char_O_EAD = char_O_END = 0; | |
| 1126 } | |
| 1127 | |
| 1128 if(!char_I_step_is_1min) | |
| 1129 calc_tissue(0); | |
| 1130 else | |
| 1131 calc_tissue(1); | |
| 1132 | |
| 1133 // Calc limit for surface, ie. GF_high. | |
| 1134 calc_limit(); | |
| 1135 | |
| 126 | 1136 // Fill int_O_ceiling if ceiling is below the surface |
| 1137 if ((calc_lead_tissue_limit-pres_surface)>0) | |
| 1138 int_O_ceiling = (short)((calc_lead_tissue_limit-pres_surface)*1000); | |
| 1139 else | |
| 1140 int_O_ceiling = 0; | |
| 1141 | |
| 0 | 1142 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
| 1143 } | |
| 1144 | |
| 1145 | |
| 1146 ////////////////////////////////////////////////////////////////////////////// | |
| 1147 // Compute stops. | |
| 1148 // | |
| 1149 // Note: because this can be very long, break on 16 iterations, and set state | |
| 1150 // to 0 when finished, or to 1 when needing to continue. | |
| 1151 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), | |
| 1152 // break the loop when total time > 512msec. | |
| 1153 // | |
| 1154 void calc_hauptroutine_calc_deco(void) | |
| 1155 { | |
| 1156 overlay unsigned char loop; | |
| 1157 | |
| 34 | 1158 for(loop = 0; loop < 16; ++loop) |
| 0 | 1159 { |
| 1160 // Limit loops to 512ms, using timer 5: | |
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1161 if( tmr5() & (512*32) ) |
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1162 break; |
| 34 | 1163 |
| 0 | 1164 if( calc_nextdecodepth() ) |
| 1165 { | |
| 1166 if( temp_depth_limit == 0 ) | |
| 1167 goto Surface; | |
| 1168 | |
| 1169 //---- We hit a stop at temp_depth_limit --------------------- | |
| 1170 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, | |
| 1171 + pres_surface; // To absolute. | |
| 1172 if( !update_deco_table() ) // Adds a one minute stops. | |
| 1173 goto Surface; // Deco table full: abort... | |
| 1174 } | |
| 1175 else | |
| 1176 { | |
| 1177 //---- No stop ----------------------------------------------- | |
| 1178 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. | |
| 1179 | |
| 1180 //---- Finish computations once surface is reached ----------- | |
| 1181 if( temp_deco <= pres_surface ) | |
| 1182 { | |
| 1183 Surface: | |
| 1184 if( char_O_deco_status == 1 ) // Don't in @+5min variant. | |
| 1185 copy_deco_table(); | |
| 1186 | |
| 1187 calc_ascenttime(); | |
| 1188 char_O_deco_status = 0; // calc nullzeit next time. | |
| 1189 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
| 1190 return; | |
| 1191 } | |
| 1192 } | |
| 1193 //---- Then update tissue -------------------------------------------- | |
| 1194 sim_dive_mins++; // Advance simulated time by 1 minute. | |
| 1195 gas_switch_set(); // Apply any simulated gas change, once validated. | |
| 1196 sim_alveolar_presures(); // Updates ppN2 and ppHe. | |
| 1197 sim_tissue(1); // Simulate compartiments for 1 minute. | |
| 1198 } | |
| 1199 | |
| 1200 // Surface not reached, need more stops... for menu animation. | |
| 1201 char_O_deco_last_stop = temp_depth_limit; // Reached depth. | |
| 1202 } | |
| 1203 | |
| 1204 | |
| 1205 ////////////////////////////////////////////////////////////////////////////// | |
| 1206 // Simulation ascention to first deco stop. | |
| 1207 // | |
| 1208 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), | |
| 1209 // there is no need to break on more that 16 iterations | |
| 1210 // (or we are already in deep shit). | |
| 1211 // | |
| 1212 // Input: pres_respiration | |
| 1213 // Output: temp_deco | |
| 1214 // | |
| 1215 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, | |
| 1216 // before ascent. | |
| 1217 void sim_ascent_to_first_stop(void) | |
| 1218 { | |
| 1219 overlay unsigned char fast = 1; // 1min or 2sec steps. | |
| 1220 | |
| 1221 update_startvalues(); | |
| 1222 clear_deco_table(); | |
| 1223 | |
| 1224 temp_deco = pres_respiration; // Starts from current real depth. | |
| 1225 | |
| 1226 // Are we doing the special @+5min variation ? | |
| 1227 if(char_O_deco_status & 4) | |
| 1228 sim_extra_time(); | |
| 1229 | |
| 1230 //---- Loop until first stop, gas switch, or surface is reached ---------- | |
| 1231 for(;;) | |
| 1232 { | |
| 1233 overlay float old_deco = temp_deco; // Pamb backup (bars) | |
| 1234 | |
| 1235 // Try ascending 1 full minute (fast) or 2sec (!fast): | |
| 1236 if( fast ) | |
| 1237 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. | |
| 1238 else | |
| 1239 temp_deco -= (10.0/30.0)*METER_TO_BAR; // 2sec at 10m/min. | |
| 1240 | |
| 1241 if( temp_deco < pres_surface ) // But don't go over surface. | |
| 1242 temp_deco = pres_surface; | |
| 1243 | |
| 1244 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because | |
| 1245 // one minute passed. | |
| 1246 sim_limit(GF_low); | |
| 1247 | |
| 1248 // Did we reach deepest remaining stop ? | |
| 1249 if( temp_deco < sim_lead_tissue_limit ) | |
| 1250 { | |
| 1251 temp_deco = old_deco; // Restore last correct depth, | |
| 1252 | |
| 1253 if( fast ) | |
| 1254 { | |
| 1255 fast = 0; // Retry with 2sec steps. | |
| 1256 continue; | |
| 1257 } | |
| 1258 else | |
| 1259 break; // Done... | |
| 1260 } | |
| 1261 | |
| 1262 // Did we reach surface ? | |
| 1263 // NOTE: we should round BEFORE checking surface is reached. | |
| 1264 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); | |
| 1265 if( temp_depth_limit == 0 ) | |
| 1266 { | |
| 1267 temp_deco = pres_surface; // Yes: finished ! | |
| 1268 break; | |
| 1269 } | |
| 1270 | |
| 1271 // Check for gas change below new depth ? | |
| 1272 if( gas_switch_deepest() ) | |
| 1273 { | |
| 1274 assert( temp_depth_limit > 0); | |
| 1275 | |
| 1276 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; | |
| 1277 break; | |
| 1278 } | |
| 1279 | |
| 1280 if( fast ) | |
| 1281 sim_dive_mins++; // Advance simulated time by 1 minute. | |
| 1282 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe | |
| 1283 sim_tissue(fast); // and update tissues for 1 min. | |
| 1284 } | |
| 1285 } | |
| 1286 | |
| 1287 ////////////////////////////////////////////////////////////////////////////// | |
| 1288 // Simulation extra time at the current depth. | |
| 1289 // | |
| 1290 // This routine is used for @+5min feature. | |
| 1291 void sim_extra_time(void) | |
| 1292 { | |
| 1293 overlay unsigned char extra = char_I_extra_time; | |
| 1294 do { | |
| 1295 sim_dive_mins++; // Advance simulated time by 1 minute. | |
| 1296 sim_tissue(1); // and update tissues for 1 min. | |
| 1297 } while( --extra != 0 ); | |
| 1298 } | |
| 1299 | |
| 1300 ////////////////////////////////////////////////////////////////////////////// | |
| 1301 // calc_tissue | |
| 1302 // | |
| 1303 // optimized in v.101 | |
| 1304 // | |
| 1305 static void calc_tissue(PARAMETER unsigned char period) | |
| 1306 { | |
| 1307 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m | |
| 1308 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 1309 | |
| 1310 for (ci=0;ci<NUM_COMP;ci++) | |
| 1311 { | |
| 1312 read_buhlmann_times(period); // 2 sec or 1 min period. | |
| 1313 | |
| 1314 // N2 | |
| 1315 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; | |
| 1316 temp_tissue_safety(); | |
| 1317 pres_tissue_N2[ci] += temp_tissue; | |
| 1318 | |
| 1319 // He | |
| 1320 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; | |
| 1321 temp_tissue_safety(); | |
| 1322 pres_tissue_He[ci] += temp_tissue; | |
| 1323 } | |
| 1324 } | |
| 1325 | |
| 1326 ////////////////////////////////////////////////////////////////////////////// | |
| 1327 // calc_limit | |
| 1328 // | |
| 1329 // New in v.111 : separated from calc_tissue(), and depends on GF value. | |
| 1330 // | |
| 1331 static void calc_limit(void) | |
| 1332 { | |
| 1333 char_O_gtissue_no = 255; | |
| 1334 calc_lead_tissue_limit = 0.0; | |
| 1335 | |
| 1336 for(ci=0; ci<NUM_COMP;ci++) | |
| 1337 { | |
| 1338 overlay float N2 = pres_tissue_N2[ci]; | |
| 1339 overlay float He = pres_tissue_He[ci]; | |
| 1340 overlay float p = N2 + He; | |
| 1341 | |
| 1342 read_buhlmann_coefficients(); | |
| 1343 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; | |
| 1344 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 1345 | |
| 1346 // Apply the Eric Baker's varying gradient factor correction. | |
| 1347 // Note: the correction factor depends both on GF and b, | |
| 1348 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1349 // so that can change who is the leading gas... | |
| 1350 // Note: Also depends of the GF. So the calcul is different for | |
| 1351 // GF_low, current GF, or GF_high... | |
| 1352 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1353 // hence what would happend at surface, | |
| 1354 // hence at GF_high. | |
| 1355 if( char_I_deco_model != 0 ) | |
| 1356 p = ( p - var_N2_a * GF_high) * var_N2_b | |
| 1357 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
| 1358 else | |
| 1359 p = (p - var_N2_a) * var_N2_b; | |
| 1360 if( p < 0.0 ) p = 0.0; | |
| 1361 | |
| 1362 if( p > calc_lead_tissue_limit ) | |
| 1363 { | |
| 1364 char_O_gtissue_no = ci; | |
| 1365 calc_lead_tissue_limit = p; | |
| 1366 } | |
| 1367 } | |
| 1368 | |
| 1369 assert( char_O_gtissue_no < NUM_COMP ); | |
| 1370 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); | |
| 1371 } | |
| 1372 | |
| 1373 ////////////////////////////////////////////////////////////////////////////// | |
| 1374 // calc_nullzeit | |
| 1375 // | |
| 1376 // calculates the remaining bottom time | |
| 1377 // | |
| 1378 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second | |
| 1379 // exponential term to the M-value equation, making it impossible to | |
| 1380 // invert... So we have to make a fast-simu until we find a better way. | |
| 1381 // | |
| 1382 // Input: pres_respiration | |
| 1383 // Output: char_O_nullzeit | |
| 1384 // | |
| 1385 static void calc_nullzeit(void) | |
| 1386 { | |
| 1387 //---- Compute ppN2 and ppHe --------------------------------------------- | |
| 1388 temp_deco = pres_respiration; | |
| 1389 sim_alveolar_presures(); | |
| 1390 | |
| 1391 char_O_nullzeit = 240; | |
| 1392 for(ci=0; ci<NUM_COMP; ci++) | |
| 1393 { | |
| 1394 //---- Read A/B values and loading factor for N2 and He -------------- | |
| 1395 overlay float tN2 = pres_tissue_N2[ci]; | |
| 1396 overlay float tHe = pres_tissue_He[ci]; | |
| 1397 overlay float t = tN2 + tHe; | |
| 1398 overlay unsigned char ndl; | |
| 1399 overlay unsigned char period = 10; | |
| 1400 | |
| 1401 read_buhlmann_coefficients(); | |
| 1402 read_buhlmann_times(2); // Starts with a 10min period. | |
| 1403 | |
| 1404 //---- Simulate for that tissue -------------------------------------- | |
| 1405 // NOTE: No need to simulate for longuer than the already found NDL. | |
| 1406 for(ndl=0; ndl<char_O_nullzeit;) | |
| 1407 { | |
| 1408 //---- Compute updated mix M-value at surface | |
| 1409 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; | |
| 1410 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; | |
| 1411 overlay float M0 = (a + pres_surface/b); | |
| 1412 | |
| 1413 //---- Add 10min/1min to N2/He tissues | |
| 1414 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; | |
| 1415 overlay float dTHe = (ppHe - tHe) * var_He_e; | |
| 1416 | |
| 1417 //---- Apply security margin when using the non-GF model | |
| 1418 if( char_I_deco_model == 0 ) | |
| 1419 { | |
|
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1420 // NDL can be computed while ascending... SO we have |
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1421 // to check wether we are saturating or desaturating. |
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1422 if( dTN2 > 0.0 ) dTN2 *= float_saturation_multiplier; |
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1423 else dTN2 *= float_desaturation_multiplier; |
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1424 |
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1425 if( dTHe > 0.0 ) dTHe *= float_saturation_multiplier; |
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1426 else dTHe *= float_saturation_multiplier; |
| 0 | 1427 } |
| 1428 else // Or GF-based model | |
| 1429 M0 = GF_high * (M0 - pres_surface) + pres_surface; | |
| 1430 | |
| 1431 //---- Simulate off-gasing while going to surface | |
| 1432 // TODO ! | |
| 1433 // dTN2 -= exp( ... ascent time ... ppN2...) | |
| 1434 // dTHe -= exp( ... ascent time ... ppHe...) | |
| 1435 | |
| 1436 //---- Ok now, and still ok to surface after 1 or 10 minutes ? | |
| 1437 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) | |
| 1438 { | |
| 1439 tN2 += dTN2; // YES: apply gas loadings, | |
| 1440 tHe += dTHe; | |
| 1441 t = tN2 + tHe; | |
| 1442 ndl += period; // increment NDL, | |
| 1443 continue; // and loop. | |
| 1444 } | |
| 1445 | |
| 1446 //---- Should we retry with smaller steps ? | |
| 1447 if( period == 10 ) | |
| 1448 { | |
| 1449 read_buhlmann_times(1); // 1min coefs. | |
| 1450 period = 1; | |
| 1451 continue; | |
| 1452 } | |
| 1453 | |
| 1454 //---- ELSE make a linear approx for the last minute | |
| 1455 // Usefull to have a meaningfull rounding of NDL. | |
| 1456 // But ONLY it positive (negativ casted to unsigned is bad). | |
| 1457 if( M0 > t ) | |
| 1458 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
| 1459 break; | |
| 1460 } | |
| 1461 | |
| 1462 // Keep the shortest NDL found | |
| 1463 if( ndl < char_O_nullzeit ) | |
| 1464 char_O_nullzeit = ndl; | |
| 1465 } | |
| 1466 } | |
| 1467 | |
| 1468 ////////////////////////////////////////////////////////////////////////////// | |
| 1469 // calc_ascenttime | |
| 1470 // | |
| 1471 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, | |
| 1472 // and all stops. | |
| 1473 // | |
| 1474 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. | |
| 1475 static void calc_ascenttime(void) | |
| 1476 { | |
| 1477 overlay unsigned char x; | |
| 1478 overlay unsigned short sum; | |
| 1479 | |
| 1480 // + 0.7 to count 1 minute ascent time from 3 metre to surface | |
| 1481 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
| 1482 if (ascent < 0.0) | |
| 1483 ascent = 0.0; | |
| 1484 sum = (unsigned short)(ascent + 0.99); | |
| 1485 | |
| 1486 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) | |
| 1487 sum += (unsigned short)internal_deco_time[x]; | |
| 1488 | |
| 1489 if( char_O_deco_status == 1 ) | |
| 1490 int_O_ascenttime = sum; | |
| 1491 else | |
| 1492 int_O_extra_ascenttime = sum; | |
| 1493 | |
| 1494 } | |
| 1495 | |
| 1496 ////////////////////////////////////////////////////////////////////////////// | |
| 1497 // update_startvalues | |
| 1498 // | |
| 1499 // updated in v.102 | |
| 1500 // | |
| 1501 void update_startvalues(void) | |
| 1502 { | |
| 1503 overlay unsigned char x; | |
| 1504 | |
| 1505 // Start ascent simulation with current tissue partial pressures. | |
| 1506 for(x=0; x<NUM_COMP; x++) | |
| 1507 { | |
| 1508 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; | |
| 1509 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
| 1510 } | |
| 1511 | |
| 1512 // No leading tissue (yet) for this ascent simulation. | |
| 1513 sim_lead_tissue_limit = 0.0; | |
| 1514 sim_lead_tissue_no = 255; | |
| 1515 } | |
| 1516 | |
| 1517 ////////////////////////////////////////////////////////////////////////////// | |
| 1518 // sim_tissue | |
| 1519 // | |
| 1520 // optimized in v.101 | |
| 1521 // | |
| 1522 // Function very simular to calc_tissue, but: | |
| 1523 // + Use a 1min or 10min period. | |
| 1524 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 1525 static void sim_tissue(PARAMETER unsigned char period) | |
| 1526 { | |
| 1527 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m | |
| 1528 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 1529 | |
| 1530 for(ci=0; ci<NUM_COMP; ci++) | |
| 1531 { | |
| 1532 read_buhlmann_times(period); // 1 or 10 minute(s) interval | |
| 1533 | |
| 1534 // N2 | |
| 1535 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; | |
| 1536 temp_tissue_safety(); | |
| 1537 sim_pres_tissue_N2[ci] += temp_tissue; | |
| 1538 | |
| 1539 // He | |
| 1540 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; | |
| 1541 temp_tissue_safety(); | |
| 1542 sim_pres_tissue_He[ci] += temp_tissue; | |
| 1543 } | |
| 1544 } | |
| 1545 | |
| 1546 ////////////////////////////////////////////////////////////////////////////// | |
| 1547 // sim_limit() | |
| 1548 // | |
| 1549 // New in v.111 | |
| 1550 // | |
| 1551 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1552 // different depth, because it depends on current gradient factor. | |
| 1553 // | |
| 1554 static void sim_limit(PARAMETER float GF_current) | |
| 1555 { | |
| 1556 assert( 0.0 < GF_current && GF_current <= 1.0f); | |
| 1557 | |
| 1558 sim_lead_tissue_limit = 0.0; | |
| 1559 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. | |
| 1560 | |
| 1561 for(ci=0; ci<NUM_COMP; ci++) | |
| 1562 { | |
| 1563 overlay float N2 = sim_pres_tissue_N2[ci]; | |
| 1564 overlay float He = sim_pres_tissue_He[ci]; | |
| 1565 overlay float p = N2 + He; | |
| 1566 | |
| 1567 read_buhlmann_coefficients(); | |
| 1568 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; | |
| 1569 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 1570 | |
| 1571 // Apply the Eric Baker's varying gradient factor correction. | |
| 1572 // Note: the correction factor depends both on GF and b, | |
| 1573 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1574 // so that can change who is the leading gas... | |
| 1575 // Note: Also depends of the GF_current... | |
| 1576 if( char_I_deco_model != 0 ) | |
| 1577 p = ( p - var_N2_a * GF_current) | |
| 1578 / (GF_current / var_N2_b + 1.0 - GF_current); | |
| 1579 else | |
| 1580 p = (p - var_N2_a) * var_N2_b; | |
| 1581 if( p < 0.0 ) p = 0.0; | |
| 1582 | |
| 1583 if( p > sim_lead_tissue_limit ) | |
| 1584 { | |
| 1585 sim_lead_tissue_no = ci; | |
| 1586 sim_lead_tissue_limit = p; | |
| 1587 } | |
| 1588 } // for ci | |
| 1589 | |
| 1590 assert( sim_lead_tissue_no < NUM_COMP ); | |
| 1591 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); | |
| 1592 } | |
| 1593 | |
| 1594 ////////////////////////////////////////////////////////////////////////////// | |
| 1595 // clear_deco_table | |
| 1596 // | |
| 1597 // unchanged in v.101 | |
| 1598 // | |
| 1599 static void clear_deco_table(void) | |
| 1600 { | |
| 1601 overlay unsigned char x; | |
| 1602 | |
| 1603 for(x=0; x<NUM_STOPS; ++x) | |
| 1604 { | |
| 1605 internal_deco_time [x] = 0; | |
| 1606 internal_deco_depth[x] = 0; | |
| 1607 } | |
| 1608 } | |
| 1609 | |
| 1610 ////////////////////////////////////////////////////////////////////////////// | |
| 1611 // update_deco_table | |
| 1612 // | |
| 1613 // Add 1 min to current stop. | |
| 1614 // | |
| 1615 // Inputs: | |
| 1616 // temp_depth_limit = stop's depth, in meters. | |
| 1617 // In/Out: | |
| 1618 // internal_deco_depth[] : depth (in metres) of each stops. | |
| 1619 // internal_deco_time [] : time (in minutes) of each stops. | |
| 1620 // | |
| 1621 static unsigned char update_deco_table() | |
| 1622 { | |
| 1623 overlay unsigned char x; | |
| 1624 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). | |
| 1625 assert( temp_depth_limit > 0 ); // No stop at surface... | |
| 1626 | |
| 1627 for(x=0; x<NUM_STOPS; ++x) | |
| 1628 { | |
| 1629 // Make sure deco-stops are recorded in order: | |
| 111 | 1630 assert( !internal_deco_depth[x] || temp_depth_limit <= internal_deco_depth[x] ); |
| 0 | 1631 |
| 111 | 1632 if( internal_deco_depth[x]== temp_depth_limit ) |
| 0 | 1633 { |
| 1634 // Do not overflow (max 255') | |
| 1635 if( internal_deco_time[x] < 255 ) | |
| 1636 { | |
| 1637 internal_deco_time[x]++; | |
| 1638 return 1; | |
| 1639 } | |
| 1640 // But store extra in the next stop... | |
| 1641 } | |
| 1642 | |
| 1643 if( internal_deco_depth[x] == 0 ) | |
| 1644 { | |
| 1645 internal_deco_depth[x] = temp_depth_limit; | |
| 1646 | |
| 1647 internal_deco_time[x] = 1; | |
| 111 | 1648 internal_deco_gas[x] = sim_gas_last_used; |
| 0 | 1649 return 1; |
| 1650 } | |
| 1651 } | |
| 1652 | |
| 1653 // Can't store stops at more than 96m. | |
| 1654 // Or stops at less that 3m too. | |
| 1655 // Just do nothing with that... | |
| 1656 return 0; | |
| 1657 } | |
| 1658 | |
| 1659 ////////////////////////////////////////////////////////////////////////////// | |
| 1660 // calc_gradient_factor | |
| 1661 // | |
| 1662 // optimized in v.101 (var_N2_a) | |
| 1663 // new code in v.102 | |
| 1664 // | |
| 1665 static void calc_gradient_factor(void) | |
| 1666 { | |
| 1667 overlay float gf; | |
| 1668 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; | |
| 1669 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
| 1670 | |
| 1671 assert( char_O_gtissue_no < NUM_COMP ); | |
| 1672 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); | |
| 1673 | |
| 1674 // tissue > respiration (currently off-gasing) | |
| 1675 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. | |
| 1676 // GF = 100% when respiration == limit. | |
| 1677 temp_tissue = N2 + He; | |
| 1678 if( temp_tissue <= pres_respiration ) | |
| 1679 gf = 0.0; | |
| 1680 else | |
| 1681 { | |
| 1682 overlay float limit = calc_lead_tissue_limit; | |
| 1683 // NOTE: in GF model, calc_lead_tissue_limit include already the | |
| 1684 // correction due to gradient factor. To compute the actual | |
| 1685 // current GF, we need to (re-)compute the raw ambiant-pressure | |
| 313 | 1686 // limit from the Buhlmann model. |
| 0 | 1687 if( char_I_deco_model != 0 ) |
| 1688 { | |
| 1689 ci = char_O_gtissue_no; | |
| 1690 read_buhlmann_coefficients(); | |
| 1691 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; | |
| 1692 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; | |
| 1693 limit = (temp_tissue - var_N2_a) * var_N2_b; | |
| 1694 } | |
| 1695 | |
| 1696 gf = (temp_tissue - pres_respiration) | |
| 1697 / (temp_tissue - limit) | |
| 1698 * 100.0; | |
| 1699 if( gf > 254.5 ) gf = 255.0; | |
| 1700 if( gf < 0.0 ) gf = 0.0; | |
| 1701 } | |
| 1702 char_O_gradient_factor = (unsigned char)(gf+0.5f); | |
| 1703 | |
| 1704 if( char_I_deco_model != 0 ) // calculate relative gradient factor | |
| 1705 { | |
| 1706 overlay float rgf; | |
| 1707 | |
| 1708 if( low_depth < 3 ) | |
| 1709 rgf = GF_high; | |
| 1710 else | |
| 1711 { | |
| 1712 overlay float temp1 = low_depth * METER_TO_BAR; | |
| 1713 overlay float temp2 = pres_respiration - pres_surface; | |
| 1714 | |
| 1715 if (temp2 <= 0) | |
| 1716 rgf = GF_high; | |
| 1717 else if (temp2 >= temp1) | |
| 1718 rgf = GF_low; | |
| 1719 else | |
| 1720 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 1721 } | |
| 1722 | |
| 1723 rgf = gf / rgf; // gf is already in percent | |
| 1724 if( rgf < 0.0 ) rgf = 0.0; | |
| 1725 if( rgf > 254.5 ) rgf = 255.0; | |
| 1726 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); | |
| 1727 } | |
| 1728 else | |
| 1729 char_O_relative_gradient_GF = char_O_gradient_factor; | |
| 1730 } | |
| 1731 | |
| 1732 ////////////////////////////////////////////////////////////////////////////// | |
| 1733 // deco_calc_desaturation_time | |
| 1734 // | |
| 1735 // FIXED N2_ratio | |
| 1736 // unchanged in v.101 | |
| 1737 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier | |
| 1738 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] | |
| 1739 // | |
| 1740 void deco_calc_desaturation_time(void) | |
| 1741 { | |
| 1742 RESET_C_STACK | |
| 1743 | |
| 1744 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); | |
| 1745 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1746 | |
| 313 | 1747 N2_ratio = 0.7902; // FIXED sum as stated in buhlmann |
| 0 | 1748 pres_surface = int_I_pres_surface * 0.001; |
| 1749 ppN2 = N2_ratio * (pres_surface - ppWater); | |
| 1750 int_O_desaturation_time = 0; | |
| 1751 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); | |
| 1752 | |
| 1753 for(ci=0; ci<NUM_COMP; ci++) | |
| 1754 { | |
| 1755 overlay unsigned short desat_time; // For a particular compartiment, in min. | |
| 1756 overlay float temp1; | |
| 1757 overlay float temp2; | |
| 1758 overlay float temp3; | |
| 1759 overlay float temp4; | |
| 1760 | |
| 1761 read_buhlmann_ht(); | |
| 1762 | |
| 1763 // saturation_time (for flight) and N2_saturation in multiples of halftime | |
| 1764 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1765 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1766 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations | |
| 1767 // N2 | |
| 1768 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; | |
| 1769 temp2 = ppN2 - pres_tissue_N2[ci]; | |
| 1770 if (temp2 >= 0.0) | |
| 1771 temp1 = 0.0; | |
| 1772 else | |
| 1773 temp1 = temp1 / temp2; | |
| 1774 | |
| 1775 if( 0.0 < temp1 && temp1 < 1.0 ) | |
| 1776 { | |
| 1777 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1778 // minus because log is negative. | |
| 1779 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. | |
| 1780 temp2 = var_N2_ht * temp1 / float_desaturation_multiplier; // time necessary (in minutes ) for complete desaturation (see comment about 5 percent) | |
| 1781 } | |
| 1782 else | |
| 1783 { | |
| 1784 temp1 = 0.0; | |
| 1785 temp2 = 0.0; | |
| 1786 } | |
| 1787 | |
| 1788 // He | |
| 1789 temp3 = 0.1 - pres_tissue_He[ci]; | |
| 1790 if (temp3 >= 0.0) | |
| 1791 temp3 = 0.0; | |
| 1792 else | |
| 1793 temp3 = - temp3 / pres_tissue_He[ci]; | |
| 1794 | |
| 1795 if( 0.0 < temp3 && temp3 < 1.0 ) | |
|
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1796 { |
| 0 | 1797 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
| 1798 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1799 // minus because log is negative | |
| 1800 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier | |
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1801 } |
| 0 | 1802 else |
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1803 { |
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1804 temp3 = 0.0; |
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1805 temp4 = 0.0; |
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1806 } |
| 0 | 1807 |
| 1808 // saturation_time (for flight) | |
| 1809 if (temp4 > temp2) | |
| 1810 desat_time = (unsigned short)temp4; | |
| 1811 else | |
| 1812 desat_time = (unsigned short)temp2; | |
| 1813 | |
| 1814 if(desat_time > int_O_desaturation_time) | |
| 1815 int_O_desaturation_time = desat_time; | |
| 1816 | |
| 1817 // N2 saturation in multiples of halftime for display purposes | |
| 1818 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1819 temp2 = temp2 + 80.0; // set center | |
| 1820 if (temp2 < 0.0) | |
| 1821 temp2 = 0.0; | |
| 1822 if (temp2 > 255.0) | |
| 1823 temp2 = 255.0; | |
| 1824 char_O_tissue_N2_saturation[ci] = (char)temp2; | |
| 1825 | |
| 1826 // He saturation in multiples of halftime for display purposes | |
| 1827 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1828 temp4 = temp4 + 80.0; // set center | |
| 1829 if (temp4 < 0.0) | |
| 1830 temp4 = 0.0; | |
| 1831 if (temp4 > 255.0) | |
| 1832 temp4 = 255.0; | |
| 1833 char_O_tissue_He_saturation[ci] = (char)temp4; | |
| 1834 } // for | |
| 1835 } | |
| 1836 | |
| 1837 ////////////////////////////////////////////////////////////////////////////// | |
| 1838 // calc_wo_deco_step_1_min | |
| 1839 // | |
| 1840 // FIXED N2 Ratio | |
| 1841 // optimized in v.101 (...saturation_multiplier) | |
| 1842 // desaturation slowed down to 70,42% | |
| 1843 // | |
| 1844 static void calc_wo_deco_step_1_min(void) | |
| 1845 { | |
| 1846 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); | |
| 1847 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
| 1848 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
| 1849 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1850 | |
| 1851 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
| 1852 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
| 1853 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 1854 ppHe = 0.0; | |
| 1855 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); | |
| 1856 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1857 | |
| 1858 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure | |
| 1859 | |
| 1860 clear_deco_table(); | |
| 1861 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. | |
| 1862 char_O_nullzeit = 0; | |
| 1863 int_O_ascenttime = 0; | |
| 1864 int_O_extra_ascenttime = 0; | |
| 1865 calc_gradient_factor(); | |
| 1866 } | |
| 1867 | |
| 1868 ////////////////////////////////////////////////////////////////////////////// | |
| 1869 // calc_dive_interval | |
| 1870 // | |
| 1871 // Prepare tissue for delay before the next dive simulation. | |
| 1872 // | |
| 1873 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
| 1874 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
| 1875 // | |
| 1876 // Should be protected by deco_push_tissues_to_vault(), | |
| 1877 // deco_pull_tissues_from_vault() | |
| 1878 // | |
| 1879 // desaturation slowed down to 70,42%. | |
| 1880 // | |
| 1881 static void calc_dive_interval(void) | |
| 1882 { | |
| 1883 overlay unsigned char t; | |
| 1884 overlay unsigned char backup_model; | |
| 1885 | |
| 1886 //---- Initialize simulation parameters ---------------------------------- | |
| 1887 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
| 1888 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
| 1889 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 1890 ppHe = 0.0; | |
| 1891 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); | |
| 1892 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1893 | |
| 1894 // Make sure SURFACE_DESAT_FACTOR is applied: | |
| 1895 backup_model = char_I_deco_model; | |
| 1896 char_I_deco_model = 0; | |
| 1897 | |
| 1898 //---- Perform simulation ------------------------------------------------ | |
| 1899 for(t=0; t<char_I_dive_interval; ++t) | |
| 1900 { | |
| 1901 calc_tissue(2); // period = 10min. | |
| 1902 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
| 1903 } | |
| 322 | 1904 assert( 0.0 <= CNS_fraction && CNS_fraction <= 9.99 ); // 999 % |
| 1905 int_O_CNS_fraction = (unsigned short)(CNS_fraction * 100.0 + 0.5); | |
| 0 | 1906 |
| 1907 //---- Restore model ----------------------------------------------------- | |
| 1908 char_I_deco_model = backup_model; | |
| 1909 } | |
| 1910 | |
| 1911 ////////////////////////////////////////////////////////////////////////////// | |
| 1912 // deco_clear_CNS_fraction | |
| 1913 // | |
| 1914 // new in v.101 | |
| 1915 // | |
| 1916 void deco_clear_CNS_fraction(void) | |
| 1917 { | |
| 1918 RESET_C_STACK | |
| 1919 | |
| 1920 CNS_fraction = 0.0; | |
| 1921 int_O_CNS_fraction = 0; | |
| 1922 } | |
| 1923 | |
| 1924 ////////////////////////////////////////////////////////////////////////////// | |
| 1925 // deco_calc_CNS_fraction | |
| 1926 // | |
| 1927 // Input: char_I_actual_ppO2 : Current condition (in decibars). | |
| 1928 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. | |
| 1929 // CNS_fraction : velue before period. | |
| 1930 // Output: CNS_fraction, int_O_CNS_fraction | |
| 1931 // | |
| 1932 void deco_calc_CNS_fraction(void) | |
| 1933 { | |
| 1934 overlay float time_factor = 1.0f; | |
| 1935 RESET_C_STACK | |
| 1936 | |
| 322 | 1937 assert( 0.0 <= CNS_fraction && CNS_fraction <= 9.99 ); |
| 0 | 1938 assert( char_I_actual_ppO2 > 15 ); |
| 1939 | |
| 1940 if( char_I_step_is_1min == 1 ) | |
| 1941 time_factor = 30.0f; | |
| 1942 else if( char_I_step_is_1min == 2 ) | |
| 1943 time_factor = 300.0f; | |
|
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1944 //------------------------------------------------------------------------ |
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1945 // Don't increase CNS below 0.5 bar, but keep it steady. |
| 0 | 1946 if (char_I_actual_ppO2 < 50) |
| 1947 ; // no changes | |
|
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1948 //------------------------------------------------------------------------ |
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1949 // Below (and including) 1.60 bar |
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1950 else if (char_I_actual_ppO2 < 61) |
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1951 CNS_fraction += time_factor/(-533.07 * char_I_actual_ppO2 + 54000.0); |
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1952 else if (char_I_actual_ppO2 < 71) |
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1953 CNS_fraction += time_factor/(-444.22 * char_I_actual_ppO2 + 48600.0); |
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1954 else if (char_I_actual_ppO2 < 81) |
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1955 CNS_fraction += time_factor/(-355.38 * char_I_actual_ppO2 + 42300.0); |
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1956 else if (char_I_actual_ppO2 < 91) |
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1957 CNS_fraction += time_factor/(-266.53 * char_I_actual_ppO2 + 35100.0); |
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1958 else if (char_I_actual_ppO2 < 111) |
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1959 CNS_fraction += time_factor/(-177.69 * char_I_actual_ppO2 + 27000.0); |
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1960 else if (char_I_actual_ppO2 < 152) |
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1961 CNS_fraction += time_factor/( -88.84 * char_I_actual_ppO2 + 17100.0); |
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1962 else if (char_I_actual_ppO2 < 167) |
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1963 CNS_fraction += time_factor/(-222.11 * char_I_actual_ppO2 + 37350.0); |
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1964 //------------------------------------------------------------------------ |
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1965 // Arieli et all.(2002): Modeling pulmonary and CNS O2 toxicity: |
| 322 | 1966 // J Appl Physiol 92: 248--256, 2002, doi:10.1152/japplphysiol.00434.2001 |
|
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1967 // Formula (A1) based on value for 1.55 and c=20 |
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1968 // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
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1969 else if (char_I_actual_ppO2 < 172) |
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1970 CNS_fraction += time_factor*0.00102; |
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1971 else if (char_I_actual_ppO2 < 177) |
| 0 | 1972 CNS_fraction += time_factor*0.00136; |
|
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1973 else if (char_I_actual_ppO2 < 182) |
| 0 | 1974 CNS_fraction += time_factor*0.00180; |
|
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1975 else if (char_I_actual_ppO2 < 187) |
| 0 | 1976 CNS_fraction += time_factor*0.00237; |
|
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1977 else if (char_I_actual_ppO2 < 192) |
| 0 | 1978 CNS_fraction += time_factor*0.00310; |
|
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1979 else if (char_I_actual_ppO2 < 198) |
| 0 | 1980 CNS_fraction += time_factor*0.00401; |
|
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1981 else if (char_I_actual_ppO2 < 203) |
| 0 | 1982 CNS_fraction += time_factor*0.00517; |
|
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1983 else if (char_I_actual_ppO2 < 233) |
| 0 | 1984 CNS_fraction += time_factor*0.0209; |
| 1985 else | |
| 1986 CNS_fraction += time_factor*0.0482; // value for 2.5 | |
| 1987 | |
| 322 | 1988 if( CNS_fraction > 9.99) // Limit display to 999% |
| 0 | 1989 CNS_fraction = 9.99; |
| 1990 if( CNS_fraction < 0.0 ) | |
| 1991 CNS_fraction = 0.0; | |
| 1992 | |
| 322 | 1993 int_O_CNS_fraction = (unsigned short)(100.0 * CNS_fraction + 0.5); |
| 0 | 1994 } |
| 1995 | |
| 1996 ////////////////////////////////////////////////////////////////////////////// | |
| 1997 // deco_calc_CNS_planning | |
| 1998 // | |
| 1999 // Compute CNS during predicted ascent. | |
| 2000 // | |
| 2001 // Note: Needs a call to deco_push_tissues_to_vault(), | |
| 2002 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
| 2003 // | |
| 2004 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
| 2005 // Output: CNS_fraction, int_O_CNS_fraction | |
| 2006 // | |
| 2007 void deco_calc_CNS_planning(void) | |
| 2008 { | |
| 2009 overlay unsigned char backup_gas_last_depth; | |
| 2010 overlay unsigned char backup_gas_last_used; | |
| 2011 overlay unsigned short backup_dive_mins; | |
| 2012 overlay unsigned char backup_actual_ppO2; | |
| 2013 | |
| 2014 RESET_C_STACK | |
| 2015 | |
| 2016 // Backup state machine | |
| 2017 backup_gas_last_depth = sim_gas_last_depth; | |
| 2018 backup_gas_last_used = sim_gas_last_used; | |
| 2019 backup_dive_mins = sim_dive_mins; | |
| 2020 backup_actual_ppO2 = char_I_actual_ppO2; | |
| 2021 | |
| 2022 // Uses 1min CNS period: | |
| 2023 char_I_step_is_1min = 1; | |
| 2024 | |
| 2025 //---- Retrieve bottom Gas used, and set variables. | |
| 2026 sim_gas_last_used = char_I_first_gas; | |
| 2027 sim_gas_last_depth = 0; // Surface gas marker. | |
| 2028 gas_switch_set(); // Sets initial calc_N2/He_ratio | |
| 2029 | |
| 2030 //---- CCR mode : do the full TTS at once -------------------------------- | |
| 2031 if( char_I_const_ppO2 != 0 ) | |
| 2032 { | |
| 2033 overlay unsigned short t; // Needs 16bits here ! | |
| 2034 char_I_actual_ppO2 = char_I_const_ppO2; | |
| 2035 for(t=0; t<int_O_ascenttime; ++t) | |
| 2036 deco_calc_CNS_fraction(); | |
| 2037 } | |
| 2038 else //---- OC mode : have to follow all gas switches... ----------------- | |
| 2039 { | |
| 2040 overlay unsigned char i = 0; // Decostop loop counter | |
| 2041 overlay float actual_ppO2; | |
| 2042 overlay unsigned char time, t; | |
| 2043 | |
| 2044 //---- Ascent to surface delay | |
| 2045 // NOTE: count as if time is spent with bottom pressure, | |
| 2046 // AND the bottom gas | |
| 2047 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) | |
| 2048 * (1.0 - calc_N2_ratio - calc_He_ratio); | |
| 2049 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; | |
| 2050 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; | |
| 2051 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); | |
| 2052 | |
| 2053 // Ascent time (rounded up): | |
| 2054 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); | |
| 2055 | |
| 2056 for(t=0; t<time; ++t) | |
| 2057 { | |
| 2058 deco_calc_CNS_fraction(); | |
| 2059 sim_dive_mins++; | |
| 2060 } | |
| 2061 | |
| 2062 //---- Do all further stops ------------------------------------------ | |
| 2063 for(i=0; i<NUM_STOPS; ++i) | |
| 2064 { | |
| 111 | 2065 overlay unsigned char stop_gas; |
| 0 | 2066 |
|
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2067 //---- Get next stop --------------------------------------------- |
| 0 | 2068 { |
| 2069 time = char_O_deco_time[(NUM_STOPS-1)-i]; | |
| 2070 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i]; | |
| 111 | 2071 stop_gas = char_O_deco_gas[(NUM_STOPS-1)-i]; |
| 0 | 2072 } |
| 2073 if( time == 0 ) continue; | |
| 2074 | |
| 2075 //---- Gas Switch ? ---------------------------------------------- | |
| 111 | 2076 if( stop_gas != sim_gas_last_used ) |
| 0 | 2077 { |
| 111 | 2078 sim_gas_last_depth = deco_gas_change[stop_gas-1]; |
| 2079 sim_gas_last_used = stop_gas; | |
| 0 | 2080 gas_switch_set(); |
| 2081 } | |
| 2082 | |
| 2083 //---- Convert Depth and N2_ratio to ppO2 ------------------------ | |
| 2084 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) | |
| 2085 * (1.0 - calc_N2_ratio - calc_He_ratio); | |
| 2086 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; | |
| 2087 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; | |
| 2088 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); | |
| 2089 | |
| 2090 //---- Apply the stop | |
| 2091 for(t=0; t<time; ++t) | |
| 2092 { | |
| 2093 deco_calc_CNS_fraction(); | |
| 2094 sim_dive_mins++; | |
| 2095 } | |
| 2096 } | |
| 2097 } | |
| 2098 | |
| 2099 //---- Back to normal mode... -------------------------------------------- | |
| 2100 char_I_step_is_1min = 0; | |
| 2101 sim_gas_last_depth = backup_gas_last_depth; | |
| 2102 sim_gas_last_used = backup_gas_last_used; | |
| 2103 sim_dive_mins = backup_dive_mins; | |
| 2104 char_I_actual_ppO2 = backup_actual_ppO2; | |
| 2105 } | |
| 2106 | |
| 2107 ////////////////////////////////////////////////////////////////////////////// | |
| 2108 // deco_calc_CNS_decrease_15min | |
| 2109 // | |
| 2110 // new in v.101 | |
| 2111 // | |
| 2112 // calculates the half time of 90 minutes in 6 steps of 15 min | |
| 2113 // (Used in sleepmode, for low battery mode). | |
| 2114 // | |
| 2115 // Output: int_O_CNS_fraction | |
| 2116 // Uses and Updates: CNS_fraction | |
| 2117 // | |
| 2118 void deco_calc_CNS_decrease_15min(void) | |
| 2119 { | |
| 2120 RESET_C_STACK | |
| 322 | 2121 assert( 0.0 <= CNS_fraction && CNS_fraction <= 9.99 ); |
| 0 | 2122 |
| 2123 CNS_fraction = 0.890899 * CNS_fraction; | |
| 322 | 2124 int_O_CNS_fraction = (unsigned short)(CNS_fraction * 100.0 + 0.5); |
| 0 | 2125 } |
| 2126 | |
| 2127 ////////////////////////////////////////////////////////////////////////////// | |
| 2128 // deco_calc_percentage | |
| 2129 // | |
| 2130 // new in v.101 | |
| 2131 // | |
| 2132 // calculates int_I_temp * char_I_temp / 100 | |
| 2133 // output is int_I_temp | |
| 2134 // | |
| 2135 // Used to compute NoFly remaining time. | |
| 2136 // | |
| 2137 void deco_calc_percentage(void) | |
| 2138 { | |
| 2139 RESET_C_STACK | |
| 2140 | |
| 2141 assert( 60 <= char_I_temp && char_I_temp <= 100 ); | |
| 2142 assert( int_I_temp < 5760 ); // Less than 4 days = 96h... | |
| 2143 | |
| 2144 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); | |
| 2145 | |
| 2146 assert( int_I_temp < 5760 ); // Less than 96h too... | |
| 2147 } | |
| 2148 | |
| 2149 ////////////////////////////////////////////////////////////////////////////// | |
| 2150 // deco_gas_volumes | |
| 2151 // | |
| 2152 // new in v.111 | |
| 2153 // | |
| 2154 // calculates volumes for each gas. | |
| 2155 // | |
| 2156 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. | |
| 2157 // Gas list. | |
| 2158 // char_I_first_gas is the bottom gas. | |
| 2159 // decoplan (char_O_deco_depth, char_O_deco_time). | |
|
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2160 // char_I_bottom_usage is bottom liters/minutes (5 .. 50) or bar/min. |
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2161 // char_I_deco_usage is deco liters/minutes (5 .. 50) or bar/min. |
| 0 | 2162 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
| 2163 // | |
| 2164 void deco_gas_volumes(void) | |
| 2165 { | |
| 2166 overlay float volumes[NUM_GAS]; | |
| 2167 overlay float bottom_usage, deco_usage; | |
| 135 | 2168 overlay unsigned char i; |
| 0 | 2169 overlay unsigned char gas, depth; |
| 2170 RESET_C_STACK | |
| 2171 | |
| 289 | 2172 //---- initialize -------------------------------------------------------- |
| 0 | 2173 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
| 2174 volumes[i] = 0.0; | |
| 2175 | |
|
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2176 bottom_usage = char_I_bottom_usage; // In liter/minutes. |
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2177 deco_usage = char_I_deco_usage; // In liter/minutes. |
| 289 | 2178 |
| 2179 // Early return if not defined: | |
| 2180 if( deco_usage <= 0.0 || bottom_usage <= 0.0 ) | |
| 2181 goto done; | |
| 2182 | |
| 2183 //---- Bottom usage ----------------------------------------------------- | |
| 0 | 2184 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
| 2185 gas = char_I_first_gas - 1; | |
| 2186 | |
| 289 | 2187 if( char_I_const_ppO2 == 0 ) |
| 0 | 2188 volumes[gas] |
| 2189 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
| 2190 * char_I_bottom_time // in minutes. | |
| 2191 * bottom_usage; // In liter/minutes. | |
| 2192 | |
| 2193 //---- Ascent usage ------------------------------------------------------ | |
| 2194 depth = char_I_bottom_depth; | |
| 2195 | |
| 2196 for(i=0; i<NUM_STOPS; ++i) | |
| 2197 { | |
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2198 overlay unsigned char newDepth, time, newGas; |
| 0 | 2199 |
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2200 time = char_O_deco_time[i]; |
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2201 if( time == 0 ) break; // End of stops. |
| 0 | 2202 |
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2203 newDepth = char_O_deco_depth[i]; |
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2204 newGas = char_O_deco_gas [i]-1; |
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2205 |
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2206 assert(0 < newDepth && newDepth <= depth); |
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2207 assert(0 <= newGas && newGas < NUM_GAS); |
| 0 | 2208 |
| 289 | 2209 //---- usage BEFORE gas switch (if any), at 10m/min: |
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2210 volumes[gas] += ((depth+newDepth)*0.05 + 1.0) // average depth --> bar. |
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2211 * (depth-newDepth)*0.1 // metre --> min |
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2212 * deco_usage; |
| 0 | 2213 |
| 289 | 2214 //---- Do gas switch, at new depth: |
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2215 gas = newGas; |
| 0 | 2216 depth = newDepth; |
| 2217 | |
| 289 | 2218 //---- Usage at stop: |
| 2219 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. | |
| 2220 * time // in minutes. | |
| 2221 * deco_usage; // in xxx / min @ 1bar. | |
| 0 | 2222 } |
| 2223 | |
| 2224 // From last stop to surface | |
| 289 | 2225 volumes[gas] += (depth*0.05 + 1.0) // avg depth --> bar. |
| 2226 * depth * 0.1 // time to surface, in minutes. | |
| 2227 * deco_usage; // in xxx / min @ 1bar. | |
| 0 | 2228 |
| 2229 //---- convert results for the ASM interface ----------------------------- | |
| 289 | 2230 done: |
| 0 | 2231 for(i=0; i<NUM_GAS; ++i) |
| 2232 if( volumes[i] > 65534.0 ) | |
| 2233 int_O_gas_volumes[i] = 65535; | |
| 2234 else | |
| 2235 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); | |
| 2236 } | |
| 2237 | |
| 2238 ////////////////////////////////////////////////////////////////////////////// | |
| 2239 | |
| 2240 void deco_push_tissues_to_vault(void) | |
| 2241 { | |
| 2242 overlay unsigned char x; | |
| 2243 RESET_C_STACK | |
| 2244 | |
| 2245 cns_vault = CNS_fraction; | |
| 2246 low_depth_vault = low_depth; | |
| 2247 | |
| 2248 for (x=0;x<NUM_COMP;x++) | |
| 2249 { | |
| 2250 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
| 2251 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
| 2252 } | |
| 2253 } | |
| 2254 | |
| 2255 void deco_pull_tissues_from_vault(void) | |
| 2256 { | |
| 2257 overlay unsigned char x; | |
| 2258 RESET_C_STACK | |
| 2259 | |
| 2260 for (x=0; x<NUM_COMP; x++) | |
| 2261 { | |
| 2262 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
| 2263 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
| 2264 } | |
| 2265 | |
| 2266 // Restore both CNS variable, too. | |
| 2267 CNS_fraction = cns_vault; | |
| 322 | 2268 int_O_CNS_fraction = (unsigned short)(CNS_fraction * 100.0 + 0.5); |
| 0 | 2269 |
| 2270 // GF history too: | |
| 2271 low_depth = low_depth_vault; | |
| 2272 locked_GF_step = GF_delta / low_depth; | |
| 2273 } | |
| 2274 | |
| 2275 ////////////////////////////////////////////////////////////////////////////// | |
| 2276 // | |
| 2277 #ifndef CROSS_COMPILE | |
| 2278 void main() {} | |
| 2279 #endif |