Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 580:32448d5ca734
BUGFIX: GasVolume should not count bottom time/depth in CCR mode.
| author | JeanDo |
|---|---|
| date | Tue, 24 Apr 2012 23:51:03 +0200 |
| parents | fff1d38625f0 |
| children | 855a00c21d0c |
| rev | line source |
|---|---|
| 116 | 1 // ************************************************************** |
| 2 // p2_deco.c | |
| 3 // | |
| 4 // Created on: 12.05.2009 | |
| 5 // Author: chsw | |
| 6 // | |
| 7 // ************************************************************** | |
| 8 | |
| 9 ////////////////////////////////////////////////////////////////////////////// | |
| 10 // OSTC - diving computer code | |
| 532 | 11 // Copyright (C) 2011 HeinrichsWeikamp GbR |
| 116 | 12 // |
| 13 // This program is free software: you can redistribute it and/or modify | |
| 14 // it under the terms of the GNU General Public License as published by | |
| 15 // the Free Software Foundation, either version 3 of the License, or | |
| 16 // (at your option) any later version. | |
| 17 // | |
| 18 // This program is distributed in the hope that it will be useful, | |
| 19 // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 20 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 21 // GNU General Public License for more details. | |
| 22 // | |
| 23 // You should have received a copy of the GNU General Public License | |
| 24 // along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 25 // | |
| 26 ////////////////////////////////////////////////////////////////////////////// | |
| 27 | |
| 28 // ***************************** | |
| 29 // ** I N T R O D U C T I O N ** | |
| 30 // ***************************** | |
| 31 // | |
| 32 // OSTC | |
| 33 // | |
| 34 // code: | |
| 35 // p2_deco_main_c_v101.c | |
| 36 // part2 of the OSTC code | |
| 37 // code with constant O2 partial pressure routines | |
| 38 // under construction !! | |
| 39 // | |
| 40 // summary: | |
| 41 // decompression routines | |
| 42 // for the OSTC experimental project | |
| 43 // written by Christian Weikamp | |
| 44 // last revision __________ | |
| 45 // comments added _________ | |
| 46 // | |
| 47 // additional files: | |
| 48 // p2_tables_v100.romdata (other files) | |
| 49 // 18f4685_ostc_v100.lkr (linker script) | |
| 50 // | |
| 51 // history: | |
| 52 // 01/03/08 v100: first release candidate | |
| 53 // 03/13/08 v101: start of programming ppO2 code | |
| 54 // 03/13/25 v101a: backup of interrim version with ppO2 calculation | |
| 55 // 03/13/25 v101: open circuit gas change during deco | |
| 56 // 03/13/25 v101: CNS_fraction calculation | |
| 57 // 03/13/26 v101: optimization of tissue calc routines | |
| 58 // 07/xx/08 v102a: debug of bottom time routine | |
| 59 // 09/xx/08 v102d: Gradient Factor Model implemenation | |
| 60 // 10/10/08 v104: renamed to build v103 for v118 stable | |
| 171 | 61 // 10/14/08 v104: integration of char_I_depth_last_deco for Gradient Model |
| 116 | 62 // 03/31/09 v107: integration of FONT Incon24 |
| 63 // 05/23/10 v109: 5 gas changes & 1 min timer | |
| 64 // 07/13/10 v110: cns vault added | |
| 65 // 12/25/10 v110: split in three files (deco.c, main.c, definitions.h) | |
| 163 | 66 // 2011/01/20: [jDG] Create a common file included in ASM and C code. |
| 167 | 67 // 2011/01/23: [jDG] Added read_custom_function(). |
| 203 | 68 // 2011/01/24: [jDG] Make ascenttime an short. No more overflow! |
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69 // 2011/01/25: [jDG] Fusion deco array for both models. |
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70 // 2011/01/25: [jDG] Use CF(54) to reverse deco order. |
| 193 | 71 // 2011/02/11: [jDG] Reworked gradient-factor implementation. |
| 197 | 72 // 2011/02/13: [jDG] CF55 for additional gas switch delay in decoplan. |
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73 // 2011/02/15: [jDG] Fixed inconsistencies introduced by gas switch delays. |
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74 // 2011/03/21: [jDG] Added gas consumption (CF56 & CF57) evaluation for OCR mode. |
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75 // 2011/04/10: [jDG] Use timer TMR3 to limit loops in calc_hauptroutine_calc_deco(). |
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76 // 2011/04/15: [jDG] Store low_depth in 32bits (w/o rounding), for a better stability. |
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77 // 2011/04/25: [jDG] Added 1mn mode for CNS calculation, to allow it for decoplanning. |
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78 // 2011/04/27: [jDG] Fixed char_O_gradient_factor calculation when model uses gradient-factor. |
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79 // 2011/05/02: [jDG] Added "Future TTS" function (CF58). |
| 338 | 80 // 2011/05/17: [jDG] Various cleanups. |
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81 // 2011/08/08: [jDG] Computes CNS during deco planning ascent. |
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82 // 2011/11/24: [jDG] Slightly faster and better NDL computation. |
| 562 | 83 // 2011/12/17: [mH] Remove of the useless debug stuff |
| 561 | 84 // 2012/02/24: [jDG] Remove missed stop bug. |
| 562 | 85 // 2012/02/25: [jDG] Looking for a more stable LOW grad factor reference. |
| 116 | 86 // |
| 167 | 87 // TODO: |
| 88 // + Allow to abort MD2 calculation (have to restart next time). | |
| 89 // | |
| 90 // Literature: | |
| 200 | 91 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
| 116 | 92 // Schr"oder, Kai & Reith, Steffen; 2000; S"attigungsvorg"ange beim Tauchen, das Modell ZH-L16, Funktionsweise von Tauchcomputern; http://www.achim-und-kai.de/kai/tausim/saett_faq |
| 93 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
| 94 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
| 95 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
| 96 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
| 167 | 97 // |
| 98 // | |
| 116 | 99 |
| 100 // ********************* | |
| 101 // ** I N C L U D E S ** | |
| 102 // ********************* | |
| 103 #include <math.h> | |
| 167 | 104 |
| 192 | 105 // *********************************************** |
| 106 // ** V A R I A B L E S D E F I N I T I O N S ** | |
| 107 // *********************************************** | |
| 108 | |
| 109 #include "p2_definitions.h" | |
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110 #define TEST_MAIN |
| 509 | 111 #include "../OSTC_code_asm_part1/shared_definitions.h" |
| 192 | 112 |
| 200 | 113 // Water vapour partial pressure in the lumb. |
| 527 | 114 #define ppWater 0.0627 |
| 317 | 115 #define METER_TO_BAR 0.09985 |
| 116 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
| 200 | 117 |
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118 // Surface security factor |
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119 #define SURFACE_DESAT_FACTOR 0.7042 |
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120 |
| 167 | 121 // ************************* |
| 122 // ** P R O T O T Y P E S ** | |
| 123 // ************************* | |
| 124 | |
| 125 static void calc_hauptroutine(void); | |
| 126 static void calc_nullzeit(void); | |
| 127 | |
| 192 | 128 static void calc_tissue(PARAMETER unsigned char period); |
| 258 | 129 static void calc_limit(void); |
| 192 | 130 |
| 167 | 131 static void clear_tissue(void); |
| 132 static void calc_ascenttime(void); | |
| 133 static void update_startvalues(void); | |
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134 static void clear_deco_table(void); |
| 471 | 135 static unsigned char update_deco_table(void); |
| 192 | 136 |
| 137 static void sim_tissue(PARAMETER unsigned char period); | |
| 138 static void sim_limit(PARAMETER float GF_current); | |
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139 static void sim_extra_time(void); |
| 368 | 140 static void calc_dive_interval(void); |
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141 |
| 167 | 142 static void calc_gradient_factor(void); |
| 143 static void calc_wo_deco_step_1_min(void); | |
| 144 | |
| 145 static void calc_hauptroutine_data_input(void); | |
| 146 static void calc_hauptroutine_update_tissues(void); | |
| 147 static void calc_hauptroutine_calc_deco(void); | |
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148 static void sim_ascent_to_first_stop(void); |
| 167 | 149 |
| 241 | 150 static unsigned char gas_switch_deepest(void); |
| 151 static void gas_switch_set(void); | |
| 217 | 152 |
| 241 | 153 static unsigned char calc_nextdecodepth(void); |
| 116 | 154 |
| 200 | 155 //---- Bank 4 parameters ----------------------------------------------------- |
| 163 | 156 #pragma udata bank4=0x400 |
| 116 | 157 |
| 158 static float GF_low; | |
| 159 static float GF_high; | |
| 160 static float GF_delta; | |
| 192 | 161 static float locked_GF_step; // GF_delta / low_depth |
| 162 | |
| 163 static unsigned char temp_depth_limit; | |
| 562 | 164 static unsigned char low_depth; // Depth of deepest stop |
| 171 | 165 |
| 192 | 166 // Simulation context: used to predict ascent. |
| 167 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 168 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 116 | 169 |
| 192 | 170 // Real context: what we are doing now. |
| 171 static float calc_lead_tissue_limit; // | |
| 116 | 172 |
| 338 | 173 static unsigned char internal_deco_time[NUM_STOPS]; |
| 174 static unsigned char internal_deco_depth[NUM_STOPS]; | |
| 116 | 175 |
| 176 static float cns_vault; | |
| 339 | 177 static float pres_tissue_N2_vault[NUM_COMP]; |
| 178 static float pres_tissue_He_vault[NUM_COMP]; | |
| 116 | 179 |
| 163 | 180 //---- Bank 5 parameters ----------------------------------------------------- |
| 181 #pragma udata bank5=0x500 | |
| 182 | |
| 167 | 183 static unsigned char ci; |
| 116 | 184 static float pres_respiration; |
| 185 static float pres_surface; | |
| 186 static float temp_deco; | |
| 236 | 187 static float ppN2; |
| 200 | 188 static float ppHe; |
| 116 | 189 static float temp_tissue; |
| 200 | 190 static float N2_ratio; // Breathed gas nitrogen ratio. |
| 191 static float He_ratio; // Breathed gas helium ratio. | |
| 192 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
| 193 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
| 194 static float var_He_a; // Bühlmann a, for current He tissue. | |
| 195 static float var_He_b; // Bühlmann b, for current He tissue. | |
| 196 static float var_N2_e; // Exposition, for current N2 tissue. | |
| 197 static float var_He_e; // Exposition, for current He tissue. | |
| 509 | 198 static float var_N2_ht; // Half-time for current N2 tissue. |
| 199 static float var_He_ht; // Half-time for current N2 tissue. | |
| 116 | 200 |
| 338 | 201 static float pres_diluent; // new in v.101 |
| 202 static float const_ppO2; // new in v.101 | |
| 116 | 203 |
| 241 | 204 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
| 205 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
| 203 | 206 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
| 207 static unsigned short sim_dive_mins; // Simulated dive time. | |
| 200 | 208 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
| 209 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
| 210 static float CNS_fraction; // new in v.101 | |
| 211 static float float_saturation_multiplier; // new in v.101 | |
| 212 static float float_desaturation_multiplier; // new in v.101 | |
| 338 | 213 static float float_deco_distance; // new in v.101 |
| 214 static char flag_in_divemode; // new in v.108 | |
| 167 | 215 |
| 338 | 216 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
| 167 | 217 |
| 163 | 218 //---- Bank 6 parameters ----------------------------------------------------- |
| 219 #pragma udata bank6=0x600 | |
| 116 | 220 |
| 339 | 221 float pres_tissue_N2[NUM_COMP]; |
| 222 float pres_tissue_He[NUM_COMP]; | |
| 509 | 223 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. |
| 224 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
| 116 | 225 |
| 163 | 226 //---- Bank 7 parameters ----------------------------------------------------- |
| 227 #pragma udata bank7=0x700 | |
| 509 | 228 // EMPTY ... |
| 116 | 229 |
| 163 | 230 //---- Bank 8 parameters ----------------------------------------------------- |
| 116 | 231 #pragma udata bank8=0x800 |
| 163 | 232 |
| 116 | 233 static char md_pi_subst[256]; |
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234 #define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
| 116 | 235 |
| 163 | 236 //---- Bank 9 parameters ----------------------------------------------------- |
| 167 | 237 #pragma udata bank9=0x900 |
| 116 | 238 |
| 163 | 239 static char md_state[48]; // DONT MOVE !! // has to be at the beginning of bank 9 for the asm code!!! |
| 116 | 240 |
| 167 | 241 ////////////////////////////////////////////////////////////////////////////// |
| 242 ////////////////////////////////////////////////////////////////////////////// | |
| 243 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 244 ////////////////////////////////////////////////////////////////////////////// | |
| 245 ////////////////////////////////////////////////////////////////////////////// | |
| 246 // | |
| 247 // End of PROM code is 17F00, So push tables on PROM top... | |
| 248 // | |
| 249 #pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. | |
| 250 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) | |
| 116 | 251 |
| 167 | 252 // Magic table to compute the MD2 HASH |
| 253 // | |
| 254 #pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... | |
| 203 | 255 rom const rom unsigned short md_pi[] = |
| 116 | 256 { |
| 257 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 | |
| 258 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA | |
| 259 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 | |
| 260 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A | |
| 261 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 | |
| 262 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 | |
| 263 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 | |
| 264 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 | |
| 265 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 | |
| 266 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F | |
| 267 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 | |
| 268 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 | |
| 269 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A | |
| 270 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 | |
| 271 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A | |
| 272 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 | |
| 273 }; | |
| 274 | |
| 167 | 275 ////////////////////////////////////////////////////////////////////////////// |
| 276 ////////////////////////////////////////////////////////////////////////////// | |
| 277 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 278 ////////////////////////////////////////////////////////////////////////////// | |
| 279 ////////////////////////////////////////////////////////////////////////////// | |
| 280 // | |
| 116 | 281 // all new in v.102 |
| 282 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 283 | |
| 284 #pragma code p2_deco = 0x0C000 | |
| 285 | |
| 167 | 286 ////////////////////////////////////////////////////////////////////////////// |
| 287 ////////////////////////////////////////////////////////////////////////////// | |
| 288 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 289 ////////////////////////////////////////////////////////////////////////////// | |
| 290 ////////////////////////////////////////////////////////////////////////////// | |
| 291 | |
| 235 | 292 ////////////////////////////////////////////////////////////////////////////// |
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293 // Bump to blue-screen when an assert is wrong |
| 235 | 294 #ifdef __DEBUG |
| 295 void assert_failed(PARAMETER short int line) | |
| 296 { | |
| 297 extern void PLED_resetdebugger(void); | |
| 298 extern unsigned short temp10; | |
| 299 | |
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300 temp10 = line; // Show source line number as stack depth. |
| 235 | 301 PLED_resetdebugger(); |
| 302 } | |
| 303 #endif | |
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304 |
| 235 | 305 ////////////////////////////////////////////////////////////////////////////// |
| 306 // When calling C code from ASM context, the data stack pointer and | |
| 307 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
| 308 | |
| 309 #ifdef CROSS_COMPILE | |
| 310 # define RESET_C_STACK | |
| 311 #else | |
| 312 # ifdef __DEBUG | |
| 313 # define RESET_C_STACK fillDataStack(); | |
| 314 void fillDataStack(void) | |
| 315 { | |
| 316 _asm | |
| 317 LFSR 1,C_STACK | |
| 318 MOVLW 0xCC | |
| 319 loop: MOVWF POSTINC1,0 | |
| 320 TSTFSZ FSR1L,0 | |
| 321 BRA loop | |
| 322 | |
| 323 LFSR 1,C_STACK | |
| 324 LFSR 2,C_STACK | |
| 325 _endasm | |
| 326 } | |
| 327 # else | |
| 328 # define RESET_C_STACK \ | |
| 329 _asm \ | |
| 330 LFSR 1, C_STACK \ | |
| 331 LFSR 2, C_STACK \ | |
| 332 _endasm | |
| 333 # endif | |
| 334 #endif | |
| 335 | |
| 336 ////////////////////////////////////////////////////////////////////////////// | |
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337 // Read CF values from the C code. |
| 235 | 338 |
| 488 | 339 #ifdef CROSS_COMPILE |
| 340 // Full description of the OSTC EEPROM map, including CF values. | |
| 341 # include "OSTC_eeprom.h" | |
| 342 #endif | |
| 343 | |
| 203 | 344 static short read_custom_function(PARAMETER unsigned char cf) |
| 167 | 345 { |
| 184 | 346 #ifdef CROSS_COMPILE |
| 564 | 347 return (cf & 32) ? eeprom.bank1_CF[cf-32].value.lo |
| 348 : eeprom.bank0_CF[cf ].value.lo; | |
| 184 | 349 #else |
| 167 | 350 extern unsigned char hi, lo; |
| 351 extern void getcustom15(); | |
| 352 _asm | |
| 353 movff cf,WREG | |
| 354 call getcustom15,0 | |
| 355 movff lo,PRODL | |
| 356 movff hi,PRODH | |
| 357 _endasm | |
| 184 | 358 #endif |
| 167 | 359 } |
| 360 | |
| 361 ////////////////////////////////////////////////////////////////////////////// | |
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362 // Fast subroutine to read RTC timer 3. |
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363 // Note: result is in 1/32 of msecs. |
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364 static unsigned short tmr3(void) |
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365 { |
| 261 | 366 #ifndef CROSS_COMPILE |
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367 _asm |
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368 movff 0xfb2,PRODL // TMR3L |
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369 movff 0xfb3,PRODH // TMR3H |
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370 _endasm // result in PRODH:PRODL. |
| 261 | 371 #else |
| 372 return 0; | |
| 373 #endif | |
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374 } |
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375 |
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376 ////////////////////////////////////////////////////////////////////////////// |
| 258 | 377 // read buhlmann tables A and B for compatriment ci |
| 378 // | |
| 379 static void read_buhlmann_coefficients(void) | |
| 165 | 380 { |
| 184 | 381 #ifndef CROSS_COMPILE |
| 167 | 382 // Note: we don't use far rom pointer, because the |
| 338 | 383 // 24 bits is too complex, hence we have to set |
| 167 | 384 // the UPPER page ourself... |
| 385 // --> Set zero if tables are moved to lower pages ! | |
| 386 _asm | |
| 387 movlw 1 | |
| 388 movwf TBLPTRU,0 | |
| 389 _endasm | |
| 184 | 390 #endif |
| 258 | 391 |
| 564 | 392 assert( ci < NUM_COMP ); |
| 338 | 393 |
| 394 // Use an interleaved array (AoS) to access coefficients with a | |
| 395 // single addressing. | |
| 396 { | |
| 397 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
| 398 var_N2_a = *ptr++; | |
| 399 var_N2_b = *ptr++; | |
| 400 var_He_a = *ptr++; | |
| 401 var_He_b = *ptr++; | |
| 402 } | |
| 258 | 403 } |
| 404 | |
| 405 ////////////////////////////////////////////////////////////////////////////// | |
| 406 // read buhlmann tables for compatriment ci | |
| 407 // If period == 0 : 2sec interval | |
| 408 // 1 : 1 min interval | |
| 409 // 2 : 10 min interval. | |
| 410 static void read_buhlmann_times(PARAMETER char period) | |
| 411 { | |
| 412 #ifndef CROSS_COMPILE | |
| 413 // Note: we don't use far rom pointer, because the | |
| 414 // 24 bits is to complex, hence we have to set | |
| 415 // the UPPER page ourself... | |
| 416 // --> Set zero if tables are moved to lower pages ! | |
| 417 _asm | |
| 418 movlw 1 | |
| 419 movwf TBLPTRU,0 | |
| 420 _endasm | |
| 421 #endif | |
| 338 | 422 |
| 564 | 423 assert( ci < NUM_COMP ); |
| 258 | 424 |
| 165 | 425 // Integration intervals. |
| 167 | 426 switch(period) |
| 165 | 427 { |
| 428 case 0: //---- 2 sec ----------------------------------------------------- | |
| 338 | 429 { |
| 430 overlay rom const float* ptr = &e2secs[2*ci]; | |
| 431 var_N2_e = *ptr++; | |
| 432 var_He_e = *ptr++; | |
| 433 } | |
| 165 | 434 break; |
| 435 | |
| 436 case 1: //---- 1 min ----------------------------------------------------- | |
| 338 | 437 { |
| 438 overlay rom const float* ptr = &e1min[2*ci]; | |
| 439 var_N2_e = *ptr++; | |
| 440 var_He_e = *ptr++; | |
| 441 } | |
| 165 | 442 break; |
| 443 | |
| 444 case 2: //---- 10 min ---------------------------------------------------- | |
| 338 | 445 { |
| 446 overlay rom const float* ptr = &e10min[2*ci]; | |
| 447 var_N2_e = *ptr++; | |
| 448 var_He_e = *ptr++; | |
| 449 } | |
| 165 | 450 break; |
| 197 | 451 |
| 452 default: | |
| 527 | 453 assert(0); // Never go there... |
| 165 | 454 } |
| 455 } | |
| 456 | |
| 457 ////////////////////////////////////////////////////////////////////////////// | |
| 509 | 458 // read buhlmann tables for compatriment ci |
| 459 // | |
| 460 static void read_buhlmann_ht(void) | |
| 461 { | |
| 462 | |
| 463 #ifndef CROSS_COMPILE | |
| 464 // Note: we don't use far rom pointer, because the | |
| 465 // 24 bits is to complex, hence we have to set | |
| 466 // the UPPER page ourself... | |
| 467 // --> Set zero if tables are moved to lower pages ! | |
| 468 _asm | |
| 469 movlw 1 | |
| 470 movwf TBLPTRU,0 | |
| 471 _endasm | |
| 472 #endif | |
| 473 | |
| 564 | 474 assert( ci < NUM_COMP ); |
| 509 | 475 { |
| 476 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
| 477 var_N2_ht = *ptr++; | |
| 478 var_He_ht = *ptr++; | |
| 479 } | |
| 480 | |
| 481 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
| 482 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
| 483 } | |
| 484 | |
| 485 ////////////////////////////////////////////////////////////////////////////// | |
|
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486 // calc_nextdecodepth |
| 165 | 487 // |
| 116 | 488 // new in v.102 |
| 165 | 489 // |
| 116 | 490 // INPUT, changing during dive: |
| 509 | 491 // temp_deco |
| 192 | 492 // low_depth |
| 167 | 493 // |
| 116 | 494 // INPUT, fixed during dive: |
| 167 | 495 // pres_surface |
| 496 // GF_delta | |
| 497 // GF_high | |
| 498 // GF_low | |
| 171 | 499 // char_I_depth_last_deco |
| 167 | 500 // float_deco_distance |
| 501 // | |
| 241 | 502 // RETURN TRUE iff a stop is needed. |
| 503 // | |
| 116 | 504 // OUTPUT |
| 171 | 505 // locked_GF_step |
| 167 | 506 // temp_depth_limt |
| 192 | 507 // low_depth |
| 167 | 508 // |
| 241 | 509 static unsigned char calc_nextdecodepth(void) |
| 167 | 510 { |
| 241 | 511 //--- Max ascent speed --------------------------------------------------- |
| 512 // Recompute leading gas limit, at current depth: | |
| 317 | 513 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
| 241 | 514 |
| 515 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 302 | 516 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
| 241 | 517 |
| 518 // Do we need to stop at current depth ? | |
| 519 overlay unsigned char need_stop = 0; | |
| 520 | |
| 521 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 522 | |
| 212 | 523 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
| 509 | 524 if( char_I_deco_model != 0 ) |
| 116 | 525 { |
| 562 | 526 overlay unsigned char first_stop = 0; |
| 527 overlay float p; | |
| 528 | |
| 567 | 529 sim_limit( GF_low ); |
| 562 | 530 p = sim_lead_tissue_limit - pres_surface; |
| 531 if( p <= 0.0f ) | |
| 532 goto no_deco_stop; // We can surface directly... | |
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533 |
| 562 | 534 p *= BAR_TO_METER; |
| 535 if( p < min_depth ) | |
| 536 goto no_deco_stop; // First stop is higher than 1' ascent. | |
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537 |
| 562 | 538 first_stop = 3 * (short)(0.99999 + p*0.333333); |
| 539 assert( first_stop < 128 ); | |
| 540 | |
| 541 // Apply correction for the shallowest stop. | |
| 542 if( first_stop == 3 ) // new in v104 | |
| 543 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 171 | 544 |
| 562 | 545 // Store the deepest point needing a deco stop as the LOW reference for GF. |
| 546 // NOTE: following stops will be validated using this LOW-HIGH gf scale, | |
| 547 // so if we want to keep coherency, we should not validate this stop | |
| 568 | 548 // yet, but apply the search to it, as for all the following stops afterward. |
| 562 | 549 if( first_stop > low_depth ) |
| 550 { | |
| 551 low_depth = first_stop; | |
| 568 | 552 locked_GF_step = GF_delta / first_stop; |
| 562 | 553 } |
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554 |
| 562 | 555 // We have a stop candidate. |
| 556 // But maybe ascending to the next stop will diminish the constraint, | |
| 557 // because the GF might decrease more than the preassure gradient... | |
| 558 while(first_stop > 0) | |
| 559 { | |
| 560 overlay unsigned char next_stop; // Next depth (0..90m) | |
| 561 overlay float pres_stop; // Next pressure (bar) | |
| 171 | 562 |
| 562 | 563 // Check max speed, or reaching surface. |
| 564 if( first_stop <= min_depth ) | |
| 565 goto no_deco_stop; | |
| 171 | 566 |
| 562 | 567 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
| 568 next_stop = 0; | |
| 569 else if( first_stop == 6 ) | |
| 570 next_stop = char_I_depth_last_deco; | |
| 571 else | |
| 572 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 573 | |
| 574 // Just a check we are indeed above LOW ref. | |
| 575 assert( next_stop < low_depth ); | |
| 241 | 576 |
| 562 | 577 // Total preassure at the new stop candidate: |
| 578 pres_stop = next_stop * METER_TO_BAR | |
| 579 + pres_surface; | |
| 167 | 580 |
| 562 | 581 // Keep GF_low until a first stop depth is found: |
| 582 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 192 | 583 |
| 562 | 584 // Check upper limit (lowest pressure tolerated): |
| 585 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 586 goto deco_stop_found; | |
| 587 | |
| 588 // Else, validate that stop and loop... | |
| 589 first_stop = next_stop; | |
| 590 } | |
| 591 assert( first_stop == 0 ); | |
| 171 | 592 |
| 562 | 593 no_deco_stop: |
| 594 temp_depth_limit = 0; | |
| 595 goto done; | |
| 212 | 596 |
| 562 | 597 // next stop is the last validated depth found, aka first_stop |
| 598 deco_stop_found: | |
| 599 need_stop = 1; // Hit. | |
| 600 temp_depth_limit = first_stop; // Stop depth, in meter. | |
| 601 | |
| 602 done: | |
| 603 ; | |
| 116 | 604 } |
| 167 | 605 else //---- ZH-L16 model ------------------------------------------------- |
| 116 | 606 { |
| 192 | 607 overlay float pres_gradient; |
| 608 | |
| 609 // Original model | |
| 116 | 610 // optimized in v.101 |
| 171 | 611 // char_I_depth_last_deco included in v.101 |
| 116 | 612 |
| 192 | 613 // Compute sim_lead_tissue_limit too, but just once. |
| 614 sim_limit(1.0); | |
| 615 | |
| 616 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 167 | 617 if (pres_gradient >= 0) |
| 116 | 618 { |
| 317 | 619 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
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620 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
| 241 | 621 need_stop = 1; // Hit. |
| 622 | |
| 623 // Implement last stop at 4m/5m/6m... | |
| 624 if( temp_depth_limit == 3 ) | |
| 625 temp_depth_limit = char_I_depth_last_deco; | |
| 171 | 626 } |
| 116 | 627 else |
| 241 | 628 temp_depth_limit = 0; |
| 171 | 629 } |
| 212 | 630 |
| 217 | 631 //---- Check gas change -------------------------------------------------- |
| 241 | 632 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
| 633 | |
| 634 return need_stop; | |
| 167 | 635 } |
| 116 | 636 |
| 167 | 637 ////////////////////////////////////////////////////////////////////////////// |
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638 // copy_deco_table |
| 167 | 639 // |
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640 // Buffer the stops, once computed, so we can continue to display them |
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641 // while computing the next set. |
| 167 | 642 // |
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643 static void copy_deco_table(void) |
| 116 | 644 { |
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645 // Copy depth of the first (deepest) stop, because when reversing |
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646 // order, it will be hard to find... |
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647 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
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648 char_O_first_deco_time = internal_deco_time [0]; |
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649 |
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650 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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651 { |
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652 overlay unsigned char x, y; |
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653 |
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654 //---- First: search the first non-null depth |
| 339 | 655 for(x=(NUM_STOPS-1); x != 0; --x) |
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656 if( internal_deco_depth[x] != 0 ) break; |
| 116 | 657 |
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658 //---- Second: copy to output table (in reverse order) |
| 338 | 659 for(y=0; y<NUM_STOPS; y++, --x) |
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660 { |
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661 char_O_deco_depth[y] = internal_deco_depth[x]; |
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662 char_O_deco_time [y] = internal_deco_time [x]; |
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663 |
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664 // Stop only once the last transfer is done. |
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665 if( x == 0 ) break; |
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666 } |
| 116 | 667 |
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668 //---- Third: fill table end with null |
| 339 | 669 for(y++; y<NUM_STOPS; y++) |
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670 { |
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671 char_O_deco_time [y] = 0; |
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672 char_O_deco_depth[y] = 0; |
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673 } |
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674 } |
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675 else //---- Straight copy ------------------------------------------------ |
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676 { |
| 167 | 677 overlay unsigned char x; |
| 678 | |
| 339 | 679 for(x=0; x<NUM_STOPS; x++) |
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680 { |
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681 char_O_deco_depth[x] = internal_deco_depth[x]; |
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682 char_O_deco_time [x] = internal_deco_time [x]; |
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683 } |
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684 } |
| 167 | 685 } |
| 116 | 686 |
| 167 | 687 ////////////////////////////////////////////////////////////////////////////// |
| 116 | 688 // temp_tissue_safety // |
| 167 | 689 // |
| 116 | 690 // outsourced in v.102 |
| 167 | 691 // |
| 692 // Apply safety factors for brand ZH-L16 model. | |
| 693 // | |
| 694 static void temp_tissue_safety(void) | |
| 116 | 695 { |
| 197 | 696 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
| 697 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 698 | |
| 167 | 699 if( char_I_deco_model == 0 ) |
| 116 | 700 { |
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701 if( temp_tissue < 0.0 ) |
| 126 | 702 temp_tissue *= float_desaturation_multiplier; |
| 116 | 703 else |
| 126 | 704 temp_tissue *= float_saturation_multiplier; |
| 116 | 705 } |
| 167 | 706 } |
| 116 | 707 |
| 167 | 708 ////////////////////////////////////////////////////////////////////////////// |
| 709 ////////////////////////////////////////////////////////////////////////////// | |
| 116 | 710 // ** THE JUMP-IN CODE ** |
| 711 // ** for the asm code ** | |
| 167 | 712 ////////////////////////////////////////////////////////////////////////////// |
| 713 ////////////////////////////////////////////////////////////////////////////// | |
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714 |
| 167 | 715 ////////////////////////////////////////////////////////////////////////////// |
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716 // Called every 2 seconds during diving. |
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717 // update tissues every time. |
| 184 | 718 // |
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719 // Every 6 seconds (or slower when TTS > 16): |
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720 // - update deco table (char_O_deco_time/depth) with new values. |
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721 // - update ascent time, |
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722 // - set status to zero (so we can check there is new results). |
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723 // |
| 116 | 724 void deco_calc_hauptroutine(void) |
| 725 { | |
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726 RESET_C_STACK |
| 116 | 727 calc_hauptroutine(); |
| 728 int_O_desaturation_time = 65535; | |
| 729 } | |
| 730 | |
| 167 | 731 ////////////////////////////////////////////////////////////////////////////// |
| 184 | 732 // Reset decompression model: |
| 733 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 734 // + Reset last stop to 0m | |
| 735 // + Reset all model output. | |
| 116 | 736 void deco_clear_tissue(void) |
| 737 { | |
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738 RESET_C_STACK |
| 116 | 739 clear_tissue(); |
| 740 } | |
| 741 | |
| 167 | 742 ////////////////////////////////////////////////////////////////////////////// |
| 278 | 743 // Called every 1 min during decoplanning. |
| 744 // Update tissues for 1 min. | |
| 745 // | |
| 746 void deco_calc_tissue(void) | |
| 747 { | |
| 748 RESET_C_STACK | |
| 749 calc_hauptroutine_update_tissues(); | |
| 750 } | |
| 751 | |
| 752 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 753 |
| 116 | 754 void deco_calc_wo_deco_step_1_min(void) |
| 755 { | |
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756 RESET_C_STACK |
| 116 | 757 calc_wo_deco_step_1_min(); |
| 758 deco_calc_desaturation_time(); | |
| 759 } | |
| 760 | |
| 167 | 761 ////////////////////////////////////////////////////////////////////////////// |
| 762 | |
| 368 | 763 void deco_calc_dive_interval(void) |
| 764 { | |
| 765 RESET_C_STACK | |
| 766 calc_dive_interval(); | |
| 767 } | |
| 768 | |
| 241 | 769 ////////////////////////////////////////////////////////////////////////////// |
| 770 // Find current gas in the list (if any). | |
| 771 // | |
| 513 | 772 // Input: char_I_current_gas = 1..6 |
| 241 | 773 // |
| 513 | 774 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. |
| 241 | 775 // |
| 776 static void gas_switch_find_current(void) | |
| 777 { | |
| 513 | 778 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
|
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779 |
| 388 | 780 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 |
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781 { |
| 388 | 782 sim_gas_last_used = char_I_current_gas; |
| 783 | |
| 784 // Note: if current is first gas, we must find it, but not set | |
| 785 // last depth change to surface. | |
| 786 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
| 787 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
| 241 | 788 } |
| 388 | 789 else |
| 790 sim_gas_last_used = 0; // Gas 6 = manual set | |
| 241 | 791 } |
| 792 | |
| 167 | 793 ////////////////////////////////////////////////////////////////////////////// |
| 217 | 794 // Find deepest available gas. |
| 201 | 795 // |
| 241 | 796 // Input: temp_depth_limit, |
| 797 // deco_gas_change[] | |
| 798 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
| 212 | 799 // |
| 241 | 800 // RETURNS TRUE if a stop is needed for gas switch. |
| 801 // | |
| 802 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
| 212 | 803 // |
| 241 | 804 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
| 805 // are null), or during the ascent to make sure we are not passing a | |
| 806 // stop (in which case both can be already set). | |
| 807 // | |
| 808 static unsigned char gas_switch_deepest(void) | |
| 201 | 809 { |
| 241 | 810 overlay unsigned char switch_deco = 0, switch_last = 0; |
| 201 | 811 |
| 812 if (char_I_const_ppO2 == 0) | |
| 813 { | |
| 225 | 814 overlay unsigned char j; |
| 815 | |
| 241 | 816 // Loop over all enabled gas, to find the deepest one, |
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817 // above last used gas, but below temp_depth_limit. |
| 338 | 818 for(j=0; j<NUM_GAS; ++j) |
| 225 | 819 { |
| 241 | 820 // Gas not (yet) allowed ? Skip ! |
| 821 if( temp_depth_limit > deco_gas_change[j] ) | |
| 822 continue; | |
| 823 | |
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824 // Gas deeper (or equal) than the current one ? Skip ! |
| 241 | 825 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
| 826 continue; | |
| 827 | |
| 828 // First, or deeper ? | |
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829 if( switch_deco < deco_gas_change[j] ) |
| 241 | 830 { |
| 831 switch_deco = deco_gas_change[j]; | |
| 388 | 832 switch_last = j+1; // 1..5 |
| 241 | 833 } |
| 225 | 834 } |
| 201 | 835 } |
| 836 | |
| 203 | 837 // If there is a better gas available |
| 241 | 838 if( switch_deco ) |
| 201 | 839 { |
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840 unsigned char delay = read_custom_function(55); |
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841 |
| 241 | 842 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
| 201 | 843 |
| 241 | 844 // Should restart gas-switch delay only when gas do changes... |
| 845 assert( sim_gas_delay <= sim_dive_mins ); | |
| 217 | 846 |
| 241 | 847 sim_gas_last_depth = switch_deco; |
| 848 sim_gas_last_used = switch_last; | |
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849 sim_gas_delay = delay |
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850 + sim_dive_mins; |
| 217 | 851 |
|
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852 if( delay ) |
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853 { |
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854 temp_depth_limit = switch_deco; |
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855 return 1; |
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856 } |
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857 else |
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858 return 0; |
| 217 | 859 } |
| 860 | |
| 241 | 861 sim_gas_delay = 0; |
| 862 return 0; | |
| 217 | 863 } |
| 864 | |
| 865 ////////////////////////////////////////////////////////////////////////////// | |
| 866 // Calculate gas switches | |
| 867 // | |
| 868 // | |
| 869 // Input: N2_ratio, He_ratio. | |
| 870 // sim_gas_last_used | |
| 871 // | |
| 872 // Output: calc_N2_ratio, calc_He_ratio | |
| 873 // | |
| 241 | 874 static void gas_switch_set(void) |
| 217 | 875 { |
| 564 | 876 assert( sim_gas_last_used <= NUM_GAS ); |
| 217 | 877 |
| 388 | 878 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. |
| 224 | 879 { |
| 880 calc_N2_ratio = N2_ratio; | |
| 881 calc_He_ratio = He_ratio; | |
| 882 } | |
| 883 else | |
| 884 { | |
| 885 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
| 886 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
| 217 | 887 } |
| 201 | 888 |
| 889 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
| 890 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
| 891 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
| 892 } | |
| 893 | |
| 894 ////////////////////////////////////////////////////////////////////////////// | |
| 895 // | |
| 212 | 896 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
| 509 | 897 // temp_deco : simulated respiration pressure |
| 276 | 898 // float_deco_distance : security factor. |
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899 // Water-vapor pressure inside limbs (ppWater). |
| 212 | 900 // |
| 236 | 901 // Output: ppN2, ppHe. |
| 212 | 902 // |
| 903 static void sim_alveolar_presures(void) | |
| 201 | 904 { |
| 212 | 905 overlay float deco_diluent = temp_deco; // new in v.101 |
| 906 | |
| 276 | 907 // Take deco offset into account, but not at surface. |
| 908 // Note: this should be done on ambiant pressure, hence before | |
| 909 // computing the diluant partial pressure... | |
| 910 if( deco_diluent > pres_surface ) | |
| 911 deco_diluent += float_deco_distance; | |
| 912 | |
| 212 | 913 //---- CCR mode : deco gas switch ? -------------------------------------- |
| 276 | 914 if( char_I_const_ppO2 != 0 ) |
| 201 | 915 { |
| 276 | 916 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
| 917 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
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918 // ppWater in the equations below: |
| 321 | 919 deco_diluent -= const_ppO2; |
| 276 | 920 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
| 212 | 921 |
| 922 if (deco_diluent > temp_deco) | |
| 923 deco_diluent = temp_deco; | |
| 201 | 924 } |
| 925 | |
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926 if( deco_diluent > ppWater ) |
| 201 | 927 { |
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928 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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929 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
| 201 | 930 } |
| 931 else | |
| 932 { | |
| 236 | 933 ppN2 = 0.0; |
| 201 | 934 ppHe = 0.0; |
| 935 } | |
| 236 | 936 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
| 201 | 937 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
| 938 } | |
| 939 | |
| 940 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 941 // clear_tissue |
| 942 // | |
| 165 | 943 // optimized in v.101 (var_N2_a) |
| 167 | 944 // |
| 945 // preload tissues with standard pressure for the given ambient pressure. | |
| 946 // Note: fixed N2_ratio for standard air. | |
| 201 | 947 // |
| 167 | 948 static void clear_tissue(void) |
| 116 | 949 { |
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950 overlay float p; |
| 116 | 951 flag_in_divemode = 0; |
| 952 | |
| 167 | 953 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
| 954 N2_ratio = 0.7902; | |
| 212 | 955 pres_respiration = int_I_pres_respiration * 0.001; |
| 164 | 956 |
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957 p = N2_ratio * (pres_respiration - ppWater); |
| 338 | 958 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 959 { |
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960 // cycle through the 16 Bühlmann N2 tissues |
| 339 | 961 pres_tissue_N2[ci] = p; |
| 197 | 962 |
| 963 // cycle through the 16 Bühlmann tissues for Helium | |
| 339 | 964 pres_tissue_He[ci] = 0.0; |
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965 } |
| 116 | 966 |
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967 clear_deco_table(); |
| 126 | 968 char_O_deco_status = 0; |
| 969 char_O_nullzeit = 0; | |
| 168 | 970 int_O_ascenttime = 0; |
| 126 | 971 char_O_gradient_factor = 0; |
| 972 char_O_relative_gradient_GF = 0; | |
| 258 | 973 |
| 974 calc_lead_tissue_limit = 0.0; | |
| 975 char_O_gtissue_no = 0; | |
| 167 | 976 } |
| 116 | 977 |
| 167 | 978 ////////////////////////////////////////////////////////////////////////////// |
| 979 // calc_hauptroutine | |
| 980 // | |
| 981 // this is the major code in dive mode calculates: | |
| 116 | 982 // the tissues, |
| 167 | 983 // the bottom time, |
| 984 // and simulates the ascend with all deco stops. | |
| 171 | 985 // |
| 986 // The deco_state sequence is : | |
| 987 // 3 (at surface) | |
| 988 // +---> 0 : calc nullzeit | |
| 989 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 990 // | +-> 1 : simulate up to 16min of stops. | |
| 991 // | +------< not finished | |
| 992 // +--------< finish | |
| 993 // | |
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994 // Added steps 6,5 for @+5 calculation: |
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995 // 6 = ascent to first stop (same as 2), except continue to 7 |
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996 // 7 = same as 1, except loop to 7. |
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997 // |
| 167 | 998 static void calc_hauptroutine(void) |
| 116 | 999 { |
| 241 | 1000 static unsigned char backup_gas_used = 0; |
| 1001 static unsigned char backup_gas_depth = 0; | |
| 217 | 1002 static unsigned char backup_gas_delay = 0; |
| 186 | 1003 |
| 116 | 1004 calc_hauptroutine_data_input(); |
| 1005 | |
| 1006 calc_hauptroutine_update_tissues(); | |
| 1007 calc_gradient_factor(); | |
| 1008 | |
| 167 | 1009 // toggle between calculation for nullzeit (bottom time), |
| 1010 // deco stops | |
| 1011 // and more deco stops (continue) | |
| 1012 switch( char_O_deco_status ) | |
| 116 | 1013 { |
| 186 | 1014 case 3: //---- At surface: start a new dive ------------------------------ |
| 1015 clear_deco_table(); | |
| 1016 copy_deco_table(); | |
| 200 | 1017 int_O_ascenttime = 0; // Reset DTR. |
| 323 | 1018 int_O_extra_ascenttime = 0; |
| 200 | 1019 char_O_nullzeit = 0; // Reset bottom time. |
| 278 | 1020 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
| 201 | 1021 |
| 217 | 1022 // Values that should be reset just once for the full real dive. |
| 1023 // This is used to record the lowest stop for the whole dive, | |
| 1024 // Including ACCROSS all simulated ascent. | |
| 567 | 1025 low_depth = 0; |
| 1026 locked_GF_step = 0.0; | |
| 217 | 1027 |
| 1028 // Reset gas switch history. | |
| 241 | 1029 backup_gas_used = sim_gas_last_used = 0; |
| 1030 backup_gas_depth = sim_gas_last_depth = 0; | |
| 217 | 1031 backup_gas_delay = sim_gas_delay = 0; |
| 203 | 1032 sim_dive_mins = 0; |
| 1033 break; | |
| 186 | 1034 |
| 167 | 1035 case 0: //---- bottom time ----------------------------------------------- |
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1036 default: |
| 509 | 1037 gas_switch_find_current(); // Lookup for current gas & time. |
| 1038 gas_switch_set(); // setup calc_ratio's | |
| 1039 | |
| 167 | 1040 calc_nullzeit(); |
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1041 if( char_O_nullzeit > 0 ) // Some NDL time left ? |
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1042 { |
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1043 char_O_deco_status = 0; // YES: recalc ndl next time. |
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1044 clear_deco_table(); // Also clear stops ! |
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1045 copy_deco_table(); |
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1046 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) |
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1047 } |
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1048 else |
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1049 char_O_deco_status = 2; // NO: calc ascent next time. |
| 186 | 1050 break; |
| 1051 | |
| 1052 case 2: //---- Simulate ascent to first stop ----------------------------- | |
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1053 case 6: // @+5min variation |
| 203 | 1054 // Check proposed gas at begin of ascent simulation |
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1055 sim_dive_mins = int_I_divemins; // Init current time. |
| 241 | 1056 |
| 532 | 1057 gas_switch_find_current(); // Lookup for current gas & time. |
| 1058 gas_switch_set(); // setup calc_ratio's | |
| 1059 | |
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1060 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1061 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
| 203 | 1062 backup_gas_delay = sim_gas_delay; |
| 186 | 1063 |
| 1064 sim_ascent_to_first_stop(); | |
| 201 | 1065 |
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1066 // Calc stops next time (deco or gas switch). |
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1067 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
| 167 | 1068 break; |
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1069 |
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1070 case 1: //---- Simulate stops -------------------------------------------- |
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1071 case 5: // @+5 variation. |
| 167 | 1072 calc_hauptroutine_calc_deco(); |
| 186 | 1073 |
| 1074 // If simulation is finished, restore the GF low reference, so that | |
| 1075 // next ascent simulation is done from the current depth: | |
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1076 if( (char_O_deco_status & 3) == 0 ) |
| 186 | 1077 { |
| 241 | 1078 sim_gas_last_used = backup_gas_used; |
| 1079 sim_gas_last_depth = backup_gas_depth; | |
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1080 sim_gas_delay = backup_gas_delay; |
| 186 | 1081 } |
| 167 | 1082 break; |
| 116 | 1083 } |
| 167 | 1084 |
| 116 | 1085 } |
| 1086 | |
| 167 | 1087 ////////////////////////////////////////////////////////////////////////////// |
| 1088 // calc_hauptroutine_data_input | |
| 1089 // | |
| 1090 // Reset all C-code dive parameters from their ASM-code values. | |
| 1091 // Detect gas change condition. | |
| 1092 // | |
| 116 | 1093 void calc_hauptroutine_data_input(void) |
| 1094 { | |
| 203 | 1095 overlay short int_temp; |
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1096 overlay unsigned char g; |
| 126 | 1097 |
| 197 | 1098 pres_respiration = int_I_pres_respiration * 0.001; |
| 1099 pres_surface = int_I_pres_surface * 0.001; | |
| 1100 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1101 He_ratio = char_I_He_ratio * 0.01; | |
| 1102 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
| 116 | 1103 |
| 126 | 1104 // ____________________________________________________ |
| 1105 // | |
| 1106 // _____________ G A S _ C H A N G E S ________________ | |
| 1107 // ____________________________________________________ | |
| 1108 | |
| 212 | 1109 // Keep a margin of 150mbar = 1.50m |
| 1110 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1111 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 126 | 1112 |
| 203 | 1113 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
|
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1114 for(g=0; g < NUM_GAS; ++g) |
| 126 | 1115 { |
|
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1116 deco_gas_change[g] = 0; |
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1117 if(char_I_deco_gas_change[g]) |
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1118 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) |
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1119 deco_gas_change[g] = char_I_deco_gas_change[g]; |
| 126 | 1120 } |
| 116 | 1121 |
| 197 | 1122 const_ppO2 = char_I_const_ppO2 * 0.01; |
| 1123 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1124 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1125 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1126 GF_high = char_I_GF_High_percentage * 0.01; | |
| 126 | 1127 GF_delta = GF_high - GF_low; |
| 116 | 1128 } |
| 1129 | |
| 167 | 1130 ////////////////////////////////////////////////////////////////////////////// |
| 171 | 1131 // |
| 1132 // | |
| 116 | 1133 void calc_hauptroutine_update_tissues(void) |
| 1134 { | |
| 197 | 1135 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
| 1136 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
| 1137 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
| 237 | 1138 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1139 |
| 276 | 1140 pres_diluent = pres_respiration; |
| 307 | 1141 if( char_I_const_ppO2 != 0 ) // new in v.101 |
| 186 | 1142 { |
| 322 | 1143 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
| 1144 | |
| 276 | 1145 pres_diluent -= const_ppO2; // new in v.101 |
| 1146 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
| 321 | 1147 if( pres_diluent < 0.0 ) |
| 1148 pres_diluent = 0.0; | |
| 276 | 1149 if( pres_diluent > pres_respiration ) // new in v.101 |
| 1150 pres_diluent = pres_respiration; // new in v.101 | |
| 307 | 1151 |
| 321 | 1152 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
| 322 | 1153 |
| 326 | 1154 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
| 322 | 1155 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
| 1156 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
| 186 | 1157 } |
| 307 | 1158 |
|
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1159 if( pres_diluent > ppWater ) // new in v.101 |
| 116 | 1160 { |
| 307 | 1161 overlay float EAD, END; |
| 1162 | |
|
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1163 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1164 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
| 307 | 1165 |
| 1166 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
| 1167 // with plain air. | |
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1168 // ppN2 = 79% * (P_EAD - ppWater) |
| 307 | 1169 // EAD = (P_EAD - Psurface) * 10 |
|
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1170 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
| 317 | 1171 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
| 307 | 1172 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
| 317 | 1173 char_O_EAD = (unsigned char)(EAD + 0.5); |
| 307 | 1174 |
| 1175 // END : Equivalent Narcotic Dive. | |
| 1176 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
| 1177 // 0.23 btw). Hence the formula becomes: | |
|
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1178 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
| 317 | 1179 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
| 307 | 1180 // |
| 1181 // Source cited: | |
| 1182 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
| 1183 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
| 317 | 1184 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
| 307 | 1185 if( END < 0.0 || END > 245.5 ) END = 0.0; |
| 317 | 1186 char_O_END = (unsigned char)(END + 0.5); |
| 116 | 1187 } |
| 167 | 1188 else // new in v.101 |
| 116 | 1189 { |
| 236 | 1190 ppN2 = 0.0; // new in v.101 |
| 200 | 1191 ppHe = 0.0; // new in v.101 |
| 307 | 1192 char_O_EAD = char_O_END = 0; |
| 116 | 1193 } |
| 1194 | |
| 1195 if(!char_I_step_is_1min) | |
| 192 | 1196 calc_tissue(0); |
| 116 | 1197 else |
| 192 | 1198 calc_tissue(1); |
| 186 | 1199 |
| 192 | 1200 // Calc limit for surface, ie. GF_high. |
| 258 | 1201 calc_limit(); |
| 186 | 1202 |
| 203 | 1203 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
| 339 | 1204 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
| 171 | 1205 } |
| 1206 | |
| 116 | 1207 |
| 167 | 1208 ////////////////////////////////////////////////////////////////////////////// |
|
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1209 // Compute stops. |
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1210 // |
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1211 // Note: because this can be very long, break on 16 iterations, and set state |
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1212 // to 0 when finished, or to 1 when needing to continue. |
|
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1213 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
|
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1214 // break the loop when total time > 512msec. |
|
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1215 // |
| 116 | 1216 void calc_hauptroutine_calc_deco(void) |
| 1217 { | |
|
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1218 overlay unsigned char loop; |
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1219 |
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1220 for(loop = 0; loop < 16; ++loop) |
| 116 | 1221 { |
|
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1222 // Limit loops to 512ms, using the RTC timer 3: |
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1223 if( tmr3() & (512*32) ) |
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1224 break; |
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1225 |
| 241 | 1226 // Do not ascent while doing a gas switch ? |
| 203 | 1227 if( sim_gas_delay <= sim_dive_mins ) |
| 1228 { | |
| 241 | 1229 if( calc_nextdecodepth() ) |
| 1230 { | |
| 1231 if( temp_depth_limit == 0 ) | |
| 1232 goto Surface; | |
| 116 | 1233 |
| 241 | 1234 //---- We hit a stop at temp_depth_limit --------------------- |
| 317 | 1235 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
| 241 | 1236 + pres_surface; // To absolute. |
| 471 | 1237 if( !update_deco_table() ) // Adds a one minute stops. |
| 1238 goto Surface; // Deco table full: abort... | |
| 241 | 1239 } |
| 1240 else | |
| 1241 { | |
| 1242 //---- No stop ----------------------------------------------- | |
| 317 | 1243 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
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1244 |
| 241 | 1245 //---- Finish computations once surface is reached ----------- |
| 1246 if( temp_deco <= pres_surface ) | |
| 1247 { | |
| 1248 Surface: | |
| 471 | 1249 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
|
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1250 copy_deco_table(); |
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1251 |
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1252 calc_ascenttime(); |
| 471 | 1253 char_O_deco_status = 0; // calc nullzeit next time. |
| 1254 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
| 241 | 1255 return; |
| 1256 } | |
| 1257 } | |
| 212 | 1258 } |
| 1259 else | |
|
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1260 { |
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1261 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1262 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
| 471 | 1263 if( !update_deco_table() ) // Just pass one minute. |
| 1264 goto Surface; // Deco table full: abort... | |
|
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1265 } |
| 197 | 1266 |
| 241 | 1267 //---- Then update tissue -------------------------------------------- |
| 203 | 1268 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1269 gas_switch_set(); // Apply any simulated gas change, once validated. |
| 212 | 1270 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
| 192 | 1271 sim_tissue(1); // Simulate compartiments for 1 minute. |
| 116 | 1272 } |
|
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1273 |
|
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|
1274 // Surface not reached, need more stops... for menu animation. |
| 278 | 1275 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
| 116 | 1276 } |
| 1277 | |
| 167 | 1278 ////////////////////////////////////////////////////////////////////////////// |
|
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1279 // Simulation ascention to first deco stop. |
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1280 // |
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1281 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1282 // there is no need to break on more that 16 iterations |
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1283 // (or we are already in deep shit). |
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1284 // |
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1285 // Input: pres_respiration |
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1286 // Output: temp_deco |
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1287 // |
|
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1288 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1289 // before ascent. |
|
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1290 void sim_ascent_to_first_stop(void) |
| 116 | 1291 { |
| 171 | 1292 update_startvalues(); |
|
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1293 clear_deco_table(); |
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1294 |
| 200 | 1295 temp_deco = pres_respiration; // Starts from current real depth. |
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1296 |
|
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1297 // Are we doing the special @+5min variation ? |
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1298 if(char_O_deco_status & 4) |
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1299 sim_extra_time(); |
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1300 |
| 212 | 1301 // Do we have a gas switch going on ? |
| 1302 if( sim_gas_delay > sim_dive_mins ) | |
| 1303 return; | |
| 1304 | |
| 241 | 1305 //---- Loop until first stop, gas switch, or surface is reached ---------- |
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1306 for(;;) |
| 116 | 1307 { |
| 461 | 1308 overlay float old_deco = temp_deco; // Pamb backup (bars) |
| 460 | 1309 |
| 241 | 1310 // Try ascending 1 full minute. |
| 461 | 1311 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. |
| 1312 if( temp_deco < pres_surface ) // But don't go over surface. | |
| 1313 temp_deco = pres_surface; | |
| 203 | 1314 |
| 461 | 1315 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because |
| 1316 // one minute passed. | |
| 212 | 1317 sim_limit(GF_low); |
| 1318 | |
| 1319 // Did we reach deepest remaining stop ? | |
| 241 | 1320 if( temp_deco < sim_lead_tissue_limit ) |
| 212 | 1321 { |
| 461 | 1322 temp_deco = old_deco; // Restore last correct depth, |
| 1323 break; // Do no spend a minute more. | |
| 212 | 1324 } |
| 1325 | |
| 203 | 1326 // Did we reach surface ? |
| 460 | 1327 // NOTE: we should round BEFORE checking surface is reached. |
| 461 | 1328 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
| 1329 if( temp_depth_limit == 0 ) | |
| 203 | 1330 { |
| 1331 temp_deco = pres_surface; // Yes: finished ! | |
| 1332 break; | |
| 1333 } | |
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1334 |
| 241 | 1335 // Check for gas change below new depth ? |
| 1336 if( gas_switch_deepest() ) | |
| 1337 { | |
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1338 assert( temp_depth_limit > 0); |
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1339 |
| 317 | 1340 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
| 212 | 1341 break; |
| 241 | 1342 } |
| 171 | 1343 |
| 203 | 1344 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1345 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
| 203 | 1346 sim_tissue(1); // and update tissues for 1 min. |
| 1347 } | |
| 167 | 1348 } |
| 116 | 1349 |
| 167 | 1350 ////////////////////////////////////////////////////////////////////////////// |
|
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1351 // Simulation extra time at the current depth. |
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1352 // |
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1353 // This routine is used for @+5min feature. |
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1354 void sim_extra_time(void) |
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1355 { |
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1356 overlay unsigned char extra = read_custom_function(58); |
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1357 do { |
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1358 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1359 sim_tissue(1); // and update tissues for 1 min. |
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1360 } while( --extra != 0 ); |
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1361 } |
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1363 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 1364 // calc_tissue |
| 1365 // | |
| 116 | 1366 // optimized in v.101 |
| 167 | 1367 // |
| 184 | 1368 static void calc_tissue(PARAMETER unsigned char period) |
| 116 | 1369 { |
| 251 | 1370 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1371 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1372 |
| 338 | 1373 for (ci=0;ci<NUM_COMP;ci++) |
| 126 | 1374 { |
| 258 | 1375 read_buhlmann_times(period); // 2 sec or 1 min period. |
| 116 | 1376 |
| 126 | 1377 // N2 |
| 339 | 1378 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1379 temp_tissue_safety(); |
| 339 | 1380 pres_tissue_N2[ci] += temp_tissue; |
| 165 | 1381 |
| 126 | 1382 // He |
| 339 | 1383 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
| 126 | 1384 temp_tissue_safety(); |
| 339 | 1385 pres_tissue_He[ci] += temp_tissue; |
| 192 | 1386 } |
| 167 | 1387 } |
| 116 | 1388 |
| 167 | 1389 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1390 // calc_limit |
| 167 | 1391 // |
| 192 | 1392 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
| 167 | 1393 // |
| 258 | 1394 static void calc_limit(void) |
| 167 | 1395 { |
| 192 | 1396 char_O_gtissue_no = 255; |
| 1397 calc_lead_tissue_limit = 0.0; | |
| 1398 | |
| 338 | 1399 for(ci=0; ci<NUM_COMP;ci++) |
| 192 | 1400 { |
| 339 | 1401 overlay float N2 = pres_tissue_N2[ci]; |
| 1402 overlay float He = pres_tissue_He[ci]; | |
|
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1403 overlay float p = N2 + He; |
| 192 | 1404 |
| 258 | 1405 read_buhlmann_coefficients(); |
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1406 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1407 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
| 116 | 1408 |
| 192 | 1409 // Apply the Eric Baker's varying gradient factor correction. |
| 1410 // Note: the correction factor depends both on GF and b, | |
| 1411 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1412 // so that can change who is the leading gas... | |
| 1413 // Note: Also depends of the GF. So the calcul is different for | |
| 1414 // GF_low, current GF, or GF_high... | |
| 1415 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1416 // hence what would happend at surface, | |
| 1417 // hence at GF_high. | |
| 509 | 1418 if( char_I_deco_model != 0 ) |
| 258 | 1419 p = ( p - var_N2_a * GF_high) * var_N2_b |
| 1420 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
| 192 | 1421 else |
| 1422 p = (p - var_N2_a) * var_N2_b; | |
| 258 | 1423 if( p < 0.0 ) p = 0.0; |
| 192 | 1424 |
| 1425 if( p > calc_lead_tissue_limit ) | |
| 1426 { | |
| 1427 char_O_gtissue_no = ci; | |
| 1428 calc_lead_tissue_limit = p; | |
| 1429 } | |
| 1430 } | |
| 197 | 1431 |
| 338 | 1432 assert( char_O_gtissue_no < NUM_COMP ); |
| 197 | 1433 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
| 167 | 1434 } |
| 1435 | |
| 1436 ////////////////////////////////////////////////////////////////////////////// | |
| 1437 // calc_nullzeit | |
| 1438 // | |
| 1439 // calculates the remaining bottom time | |
| 1440 // | |
|
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1441 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second |
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1442 // exponential term to the M-value equation, making it impossible to |
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1443 // invert... So we have to make a fast-simu until we find a better way. |
| 509 | 1444 // |
| 1445 // Input: pres_respiration | |
| 1446 // Output: char_O_nullzeit | |
| 167 | 1447 // |
| 1448 static void calc_nullzeit(void) | |
| 1449 { | |
|
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1450 //---- Compute ppN2 and ppHe --------------------------------------------- |
| 509 | 1451 temp_deco = pres_respiration; |
| 1452 sim_alveolar_presures(); | |
| 167 | 1453 |
| 509 | 1454 char_O_nullzeit = 240; |
| 1455 for(ci=0; ci<NUM_COMP; ci++) | |
| 1456 { | |
|
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1457 //---- Read A/B values and loading factor for N2 and He -------------- |
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1458 overlay float tN2 = pres_tissue_N2[ci]; |
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1459 overlay float tHe = pres_tissue_He[ci]; |
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1460 overlay float t = tN2 + tHe; |
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1461 overlay unsigned char ndl; |
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1462 overlay unsigned char period = 10; |
| 192 | 1463 |
| 509 | 1464 read_buhlmann_coefficients(); |
|
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1465 read_buhlmann_times(2); // Starts with a 10min period. |
| 509 | 1466 |
|
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1467 //---- Simulate for that tissue -------------------------------------- |
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1468 // NOTE: No need to simulate for longuer than the already found NDL. |
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1469 for(ndl=0; ndl<char_O_nullzeit;) |
| 509 | 1470 { |
|
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1471 //---- Compute updated mix M-value at surface |
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1472 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; |
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1473 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; |
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1474 overlay float M0 = (a + pres_surface/b); |
| 116 | 1475 |
|
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1476 //---- Add 10min/1min to N2/He tissues |
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1477 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; |
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1478 overlay float dTHe = (ppHe - tHe) * var_He_e; |
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1479 |
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1480 //---- Apply security margin when using the non-GF model |
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1481 if( char_I_deco_model == 0 ) |
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1482 { |
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1483 dTN2 *= float_saturation_multiplier; |
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1484 dTHe *= float_saturation_multiplier; |
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1485 } |
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1486 else // Or GF-based model |
| 509 | 1487 M0 = GF_high * (M0 - pres_surface) + pres_surface; |
| 167 | 1488 |
|
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1489 //---- Simulate off-gasing while going to surface |
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1490 // TODO ! |
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1491 // dTN2 -= exp( ... ascent time ... ppN2...) |
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1492 // dTHe -= exp( ... ascent time ... ppHe...) |
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1493 |
|
534
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1494 //---- Ok now, and still ok to surface after 1 or 10 minutes ? |
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1495 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) |
| 509 | 1496 { |
|
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1497 tN2 += dTN2; // YES: apply gas loadings, |
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1498 tHe += dTHe; |
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1499 t = tN2 + tHe; |
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1500 ndl += period; // increment NDL, |
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1501 continue; // and loop. |
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1502 } |
| 116 | 1503 |
|
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1504 //---- Should we retry with smaller steps ? |
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1505 if( period == 10 ) |
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1506 { |
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1507 read_buhlmann_times(1); // 1min coefs. |
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1508 period = 1; |
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1509 continue; |
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1510 } |
| 167 | 1511 |
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1512 //---- ELSE make a linear approx for the last minute |
| 524 | 1513 // Usefull to have a meaningfull rounding of NDL. |
| 1514 // But ONLY it positive (negativ casted to unsigned is bad). | |
| 1515 if( M0 > t ) | |
| 1516 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
|
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1517 break; |
| 509 | 1518 } |
|
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1519 |
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1520 // Keep the shortest NDL found |
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1521 if( ndl < char_O_nullzeit ) |
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1522 char_O_nullzeit = ndl; |
| 339 | 1523 } |
| 167 | 1524 } |
| 116 | 1525 |
| 167 | 1526 ////////////////////////////////////////////////////////////////////////////// |
| 1527 // calc_ascenttime | |
| 1528 // | |
|
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1529 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1530 // and all stops. |
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1531 // |
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1532 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
|
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1533 static void calc_ascenttime(void) |
| 116 | 1534 { |
| 323 | 1535 overlay unsigned char x; |
| 1536 overlay unsigned short sum; | |
| 168 | 1537 |
| 323 | 1538 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
| 1539 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
| 1540 if (ascent < 0.0) | |
| 1541 ascent = 0.0; | |
| 1542 sum = (unsigned short)(ascent + 0.99); | |
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1543 |
| 338 | 1544 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
| 323 | 1545 sum += (unsigned short)internal_deco_time[x]; |
| 1546 | |
| 1547 if( char_O_deco_status == 1 ) | |
| 1548 int_O_ascenttime = sum; | |
| 126 | 1549 else |
| 323 | 1550 int_O_extra_ascenttime = sum; |
| 167 | 1551 } |
| 116 | 1552 |
| 167 | 1553 ////////////////////////////////////////////////////////////////////////////// |
| 1554 // update_startvalues | |
| 1555 // | |
| 116 | 1556 // updated in v.102 |
| 167 | 1557 // |
| 116 | 1558 void update_startvalues(void) |
| 1559 { | |
| 167 | 1560 overlay unsigned char x; |
| 116 | 1561 |
| 201 | 1562 // Start ascent simulation with current tissue partial pressures. |
| 339 | 1563 for(x=0; x<NUM_COMP; x++) |
| 116 | 1564 { |
| 339 | 1565 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
| 1566 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
| 116 | 1567 } |
| 197 | 1568 |
| 201 | 1569 // No leading tissue (yet) for this ascent simulation. |
| 197 | 1570 sim_lead_tissue_limit = 0.0; |
| 1571 sim_lead_tissue_no = 255; | |
| 167 | 1572 } |
| 116 | 1573 |
| 167 | 1574 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1575 // sim_tissue |
| 167 | 1576 // |
| 116 | 1577 // optimized in v.101 |
| 167 | 1578 // |
| 1579 // Function very simular to calc_tissue, but: | |
| 1580 // + Use a 1min or 10min period. | |
| 1581 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 184 | 1582 static void sim_tissue(PARAMETER unsigned char period) |
| 116 | 1583 { |
| 251 | 1584 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1585 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1586 |
| 338 | 1587 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1588 { |
| 258 | 1589 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
| 165 | 1590 |
| 126 | 1591 // N2 |
| 339 | 1592 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1593 temp_tissue_safety(); |
| 339 | 1594 sim_pres_tissue_N2[ci] += temp_tissue; |
| 126 | 1595 |
| 1596 // He | |
| 339 | 1597 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
| 126 | 1598 temp_tissue_safety(); |
| 339 | 1599 sim_pres_tissue_He[ci] += temp_tissue; |
| 192 | 1600 } |
| 167 | 1601 } |
| 116 | 1602 |
| 167 | 1603 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1604 // sim_limit() |
| 1605 // | |
| 1606 // New in v.111 | |
| 1607 // | |
| 1608 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1609 // different depth, because it depends on current gradient factor. | |
| 167 | 1610 // |
| 192 | 1611 static void sim_limit(PARAMETER float GF_current) |
| 116 | 1612 { |
| 212 | 1613 assert( 0.0 < GF_current && GF_current <= 1.0f); |
| 1614 | |
| 192 | 1615 sim_lead_tissue_limit = 0.0; |
| 212 | 1616 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
| 192 | 1617 |
| 338 | 1618 for(ci=0; ci<NUM_COMP; ci++) |
| 192 | 1619 { |
| 339 | 1620 overlay float N2 = sim_pres_tissue_N2[ci]; |
| 1621 overlay float He = sim_pres_tissue_He[ci]; | |
| 241 | 1622 overlay float p = N2 + He; |
| 192 | 1623 |
| 258 | 1624 read_buhlmann_coefficients(); |
| 241 | 1625 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
| 1626 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 192 | 1627 |
| 1628 // Apply the Eric Baker's varying gradient factor correction. | |
| 1629 // Note: the correction factor depends both on GF and b, | |
| 1630 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1631 // so that can change who is the leading gas... | |
| 1632 // Note: Also depends of the GF_current... | |
| 509 | 1633 if( char_I_deco_model != 0 ) |
| 302 | 1634 p = ( p - var_N2_a * GF_current) |
| 1635 / (GF_current / var_N2_b + 1.0 - GF_current); | |
| 192 | 1636 else |
| 1637 p = (p - var_N2_a) * var_N2_b; | |
| 237 | 1638 if( p < 0.0 ) p = 0.0; |
| 192 | 1639 |
| 1640 if( p > sim_lead_tissue_limit ) | |
| 1641 { | |
| 1642 sim_lead_tissue_no = ci; | |
| 1643 sim_lead_tissue_limit = p; | |
| 1644 } | |
| 1645 } // for ci | |
| 197 | 1646 |
| 338 | 1647 assert( sim_lead_tissue_no < NUM_COMP ); |
| 237 | 1648 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
| 167 | 1649 } |
| 116 | 1650 |
| 167 | 1651 ////////////////////////////////////////////////////////////////////////////// |
|
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1652 // clear_deco_table |
| 167 | 1653 // |
| 1654 // unchanged in v.101 | |
| 1655 // | |
|
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1656 static void clear_deco_table(void) |
| 116 | 1657 { |
|
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1658 overlay unsigned char x; |
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1659 |
| 338 | 1660 for(x=0; x<NUM_STOPS; ++x) |
|
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1661 { |
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1662 internal_deco_time [x] = 0; |
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1663 internal_deco_depth[x] = 0; |
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1664 } |
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1665 } |
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1666 |
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1667 ////////////////////////////////////////////////////////////////////////////// |
|
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1668 // update_deco_table |
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1669 // |
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1670 // Add 1 min to current stop. |
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1671 // |
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1672 // Inputs: |
|
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1673 // temp_depth_limit = stop's depth, in meters. |
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1674 // In/Out: |
|
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1675 // internal_deco_depth[] : depth (in metres) of each stops. |
|
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1676 // internal_deco_time [] : time (in minutes) of each stops. |
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1677 // |
| 471 | 1678 static unsigned char update_deco_table() |
|
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1679 { |
| 192 | 1680 overlay unsigned char x; |
|
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1681 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
|
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1682 assert( temp_depth_limit > 0 ); // No stop at surface... |
|
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1683 |
| 338 | 1684 for(x=0; x<NUM_STOPS; ++x) |
| 192 | 1685 { |
| 212 | 1686 // Make sure deco-stops are recorded in order: |
|
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1687 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
| 212 | 1688 |
|
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1689 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
| 192 | 1690 { |
| 1691 // Do not overflow (max 255') | |
| 1692 if( internal_deco_time[x] < 255 ) | |
| 1693 { | |
| 1694 internal_deco_time[x]++; | |
| 471 | 1695 return 1; |
| 192 | 1696 } |
| 1697 // But store extra in the next stop... | |
|
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1698 } |
| 192 | 1699 |
|
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1700 if( internal_deco_depth[x] == 0 ) |
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1701 { |
| 192 | 1702 internal_deco_depth[x] = temp_depth_limit; |
|
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1703 if( sim_gas_delay >= sim_dive_mins ) |
|
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1704 internal_deco_depth[x] |= 0x80; |
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1705 |
|
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1706 internal_deco_time[x] = 1; |
| 471 | 1707 return 1; |
|
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1708 } |
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1709 } |
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1710 |
| 192 | 1711 // Can't store stops at more than 96m. |
| 1712 // Or stops at less that 3m too. | |
|
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1713 // Just do nothing with that... |
| 471 | 1714 return 0; |
| 167 | 1715 } |
| 116 | 1716 |
| 167 | 1717 ////////////////////////////////////////////////////////////////////////////// |
| 1718 // calc_gradient_factor | |
| 1719 // | |
| 165 | 1720 // optimized in v.101 (var_N2_a) |
| 116 | 1721 // new code in v.102 |
| 167 | 1722 // |
| 1723 static void calc_gradient_factor(void) | |
| 116 | 1724 { |
| 197 | 1725 overlay float gf; |
| 339 | 1726 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
| 1727 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
| 237 | 1728 |
| 338 | 1729 assert( char_O_gtissue_no < NUM_COMP ); |
| 237 | 1730 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1731 |
|
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1732 // tissue > respiration (currently off-gasing) |
| 302 | 1733 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
| 1734 // GF = 100% when respiration == limit. | |
|
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1735 temp_tissue = N2 + He; |
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1736 if( temp_tissue <= pres_respiration ) |
| 197 | 1737 gf = 0.0; |
| 1738 else | |
| 1739 { | |
|
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1740 overlay float limit = calc_lead_tissue_limit; |
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1741 // NOTE: in GF model, calc_lead_tissue_limit include already the |
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1742 // correction due to gradient factor. To compute the actual |
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1743 // current GF, we need to (re-)compute the raw ambiant-pressure |
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1744 // limit from the Bühlmann model. |
| 509 | 1745 if( char_I_deco_model != 0 ) |
|
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1746 { |
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1747 ci = char_O_gtissue_no; |
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1748 read_buhlmann_coefficients(); |
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1749 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1750 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1751 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1752 } |
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1753 |
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1754 gf = (temp_tissue - pres_respiration) |
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1755 / (temp_tissue - limit) |
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1756 * 100.0; |
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1757 if( gf > 254.5 ) gf = 255.0; |
| 197 | 1758 if( gf < 0.0 ) gf = 0.0; |
| 1759 } | |
|
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1760 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
| 116 | 1761 |
| 509 | 1762 if( char_I_deco_model != 0 ) // calculate relative gradient factor |
| 116 | 1763 { |
| 197 | 1764 overlay float rgf; |
| 1765 | |
| 562 | 1766 if( low_depth < 3 ) |
| 197 | 1767 rgf = GF_high; |
| 1768 else | |
| 1769 { | |
| 317 | 1770 overlay float temp1 = low_depth * METER_TO_BAR; |
| 197 | 1771 overlay float temp2 = pres_respiration - pres_surface; |
| 186 | 1772 |
| 197 | 1773 if (temp2 <= 0) |
| 1774 rgf = GF_high; | |
| 1775 else if (temp2 >= temp1) | |
| 1776 rgf = GF_low; | |
| 1777 else | |
| 1778 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 1779 } | |
| 186 | 1780 |
| 197 | 1781 rgf = gf / rgf; // gf is already in percent |
| 1782 if( rgf < 0.0 ) rgf = 0.0; | |
|
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1783 if( rgf > 254.5 ) rgf = 255.0; |
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1784 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
| 116 | 1785 } // calc relative gradient factor |
| 1786 else | |
| 1787 { | |
| 186 | 1788 char_O_relative_gradient_GF = char_O_gradient_factor; |
| 116 | 1789 } |
| 167 | 1790 } |
| 116 | 1791 |
| 167 | 1792 ////////////////////////////////////////////////////////////////////////////// |
| 1793 // deco_calc_desaturation_time | |
| 1794 // | |
| 116 | 1795 // FIXED N2_ratio |
| 1796 // unchanged in v.101 | |
|
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1797 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
| 233 | 1798 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
| 167 | 1799 // |
| 116 | 1800 void deco_calc_desaturation_time(void) |
| 1801 { | |
|
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1802 RESET_C_STACK |
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1803 |
| 233 | 1804 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 1805 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1806 | |
| 237 | 1807 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
| 233 | 1808 pres_surface = int_I_pres_surface * 0.001; |
|
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1809 ppN2 = N2_ratio * (pres_surface - ppWater); |
| 126 | 1810 int_O_desaturation_time = 0; |
|
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1811 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 233 | 1812 |
| 339 | 1813 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1814 { |
| 251 | 1815 overlay unsigned short desat_time; // For a particular compartiment, in min. |
| 1816 overlay float temp1; | |
| 1817 overlay float temp2; | |
| 1818 overlay float temp3; | |
| 1819 overlay float temp4; | |
| 338 | 1820 |
| 509 | 1821 read_buhlmann_ht(); |
| 338 | 1822 |
| 126 | 1823 // saturation_time (for flight) and N2_saturation in multiples of halftime |
| 1824 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1825 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
|
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1826 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
| 126 | 1827 // N2 |
| 339 | 1828 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
| 1829 temp2 = ppN2 - pres_tissue_N2[ci]; | |
| 126 | 1830 if (temp2 >= 0.0) |
| 1831 { | |
| 233 | 1832 temp1 = 0.0; |
| 1833 temp2 = 0.0; | |
| 126 | 1834 } |
| 1835 else | |
| 1836 temp1 = temp1 / temp2; | |
| 251 | 1837 if( 0.0 < temp1 && temp1 < 1.0 ) |
| 126 | 1838 { |
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1839 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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1840 // minus because log is negative. |
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1841 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
| 509 | 1842 temp2 = var_N2_ht * temp1 / float_desaturation_multiplier; // time necessary (in minutes ) for complete desaturation (see comment about 5 percent) , new in v.101: float_desaturation_multiplier |
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1843 |
| 126 | 1844 } |
| 1845 else | |
| 1846 { | |
| 233 | 1847 temp1 = 0.0; |
| 1848 temp2 = 0.0; | |
| 126 | 1849 } |
| 116 | 1850 |
| 126 | 1851 // He |
| 339 | 1852 temp3 = 0.1 - pres_tissue_He[ci]; |
| 126 | 1853 if (temp3 >= 0.0) |
| 1854 { | |
| 233 | 1855 temp3 = 0.0; |
| 1856 temp4 = 0.0; | |
| 126 | 1857 } |
| 1858 else | |
| 339 | 1859 temp3 = - temp3 / pres_tissue_He[ci]; |
| 251 | 1860 if( 0.0 < temp3 && temp3 < 1.0 ) |
| 126 | 1861 { |
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1862 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
| 126 | 1863 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
| 1864 // minus because log is negative | |
| 509 | 1865 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
| 126 | 1866 } |
| 1867 else | |
| 1868 { | |
| 233 | 1869 temp3 = 0.0; |
| 1870 temp4 = 0.0; | |
| 126 | 1871 } |
| 116 | 1872 |
| 126 | 1873 // saturation_time (for flight) |
| 1874 if (temp4 > temp2) | |
| 203 | 1875 desat_time = (unsigned short)temp4; |
| 126 | 1876 else |
| 203 | 1877 desat_time = (unsigned short)temp2; |
| 252 | 1878 |
| 251 | 1879 if(desat_time > int_O_desaturation_time) |
| 1880 int_O_desaturation_time = desat_time; | |
| 116 | 1881 |
| 126 | 1882 // N2 saturation in multiples of halftime for display purposes |
| 339 | 1883 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 1884 temp2 = temp2 + 80.0; // set center | |
| 126 | 1885 if (temp2 < 0.0) |
| 1886 temp2 = 0.0; | |
| 1887 if (temp2 > 255.0) | |
| 1888 temp2 = 255.0; | |
| 339 | 1889 char_O_tissue_N2_saturation[ci] = (char)temp2; |
| 233 | 1890 |
| 126 | 1891 // He saturation in multiples of halftime for display purposes |
| 339 | 1892 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 1893 temp4 = temp4 + 80.0; // set center | |
| 126 | 1894 if (temp4 < 0.0) |
| 1895 temp4 = 0.0; | |
| 1896 if (temp4 > 255.0) | |
| 1897 temp4 = 255.0; | |
| 339 | 1898 char_O_tissue_He_saturation[ci] = (char)temp4; |
| 126 | 1899 } // for |
| 167 | 1900 } |
| 116 | 1901 |
| 167 | 1902 ////////////////////////////////////////////////////////////////////////////// |
| 1903 // calc_wo_deco_step_1_min | |
| 1904 // | |
| 116 | 1905 // FIXED N2 Ratio |
| 1906 // optimized in v.101 (...saturation_multiplier) | |
| 1907 // desaturation slowed down to 70,42% | |
| 167 | 1908 // |
| 1909 static void calc_wo_deco_step_1_min(void) | |
| 116 | 1910 { |
| 251 | 1911 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 1912 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
| 1913 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
| 1914 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1915 | |
| 126 | 1916 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
| 368 | 1917 pres_respiration = pres_surface = int_I_pres_surface * 0.001; |
| 1918 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 200 | 1919 ppHe = 0.0; |
|
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1920 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 197 | 1921 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 126 | 1922 |
| 339 | 1923 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
| 167 | 1924 |
|
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1925 clear_deco_table(); |
| 200 | 1926 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
| 126 | 1927 char_O_nullzeit = 0; |
| 168 | 1928 int_O_ascenttime = 0; |
| 323 | 1929 int_O_extra_ascenttime = 0; |
| 126 | 1930 calc_gradient_factor(); |
| 167 | 1931 } |
| 126 | 1932 |
| 167 | 1933 ////////////////////////////////////////////////////////////////////////////// |
| 368 | 1934 // calc_dive_interval |
| 1935 // | |
| 1936 // Prepare tissue for delay before the next dive simulation. | |
| 1937 // | |
| 1938 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
| 1939 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
| 1940 // | |
| 1941 // Should be protected by deco_push_tissues_to_vault(), | |
| 1942 // deco_pull_tissues_from_vault() | |
| 1943 // | |
| 1944 // desaturation slowed down to 70,42%. | |
| 1945 // | |
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1946 static void calc_dive_interval(void) |
| 368 | 1947 { |
| 1948 overlay unsigned char t; | |
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1949 overlay unsigned char backup_model; |
| 368 | 1950 |
| 1951 //---- Initialize simulation parameters ---------------------------------- | |
| 1952 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
| 1953 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
| 1954 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 1955 ppHe = 0.0; | |
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1956 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 368 | 1957 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 1958 | |
| 568 | 1959 // Make sure SURFACE_DESAT_FACTOR is applied: |
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1960 backup_model = char_I_deco_model; |
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1961 char_I_deco_model = 0; |
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1962 |
| 368 | 1963 //---- Perform simulation ------------------------------------------------ |
| 1964 for(t=0; t<char_I_dive_interval; ++t) | |
| 1965 { | |
| 1966 calc_tissue(2); // period = 10min. | |
| 1967 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
| 1968 } | |
| 514 | 1969 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
| 1970 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); | |
|
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1971 |
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1972 //---- Restore model ----------------------------------------------------- |
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1973 char_I_deco_model = backup_model; |
| 368 | 1974 } |
| 1975 | |
| 1976 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 1977 ////////////////////////////////////////////////////////////////////////////// |
| 1978 ////////////////////////////////// deco_hash ///////////////////////////////// | |
| 1979 ////////////////////////////////////////////////////////////////////////////// | |
| 1980 ////////////////////////////////////////////////////////////////////////////// | |
| 126 | 1981 |
| 184 | 1982 #ifndef CROSS_COMPILE |
| 116 | 1983 void deco_hash(void) |
| 1984 { | |
| 167 | 1985 overlay unsigned char md_i, md_j; // Loop index. |
| 1986 overlay unsigned char md_t; | |
| 1987 overlay unsigned char md_buffer[16]; | |
| 1988 overlay unsigned char md_temp; | |
| 203 | 1989 overlay unsigned short md_pointer; |
| 167 | 1990 |
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1991 RESET_C_STACK |
| 126 | 1992 |
| 1993 // init | |
| 164 | 1994 for(md_i=0;md_i<16;md_i++) |
| 126 | 1995 { |
| 1996 md_state[md_i] = 0; | |
| 164 | 1997 char_O_hash[md_i] = 0; |
| 126 | 1998 } // for md_i 16 |
| 116 | 1999 |
| 126 | 2000 _asm |
| 167 | 2001 movlw 0x01 // md_pi address. |
| 2002 movwf TBLPTRU,0 | |
| 2003 movlw 0x7E | |
| 2004 movwf TBLPTRH,0 | |
| 2005 movlw 0x00 | |
| 2006 movwf TBLPTRL,0 | |
| 126 | 2007 _endasm; |
| 165 | 2008 md_i = 0; |
| 2009 do { | |
| 126 | 2010 _asm |
| 2011 TBLRDPOSTINC | |
| 2012 movff TABLAT,md_temp | |
| 2013 _endasm | |
| 165 | 2014 md_pi_subst[md_i++] = md_temp; |
| 2015 } while( md_i != 0 ); | |
| 2016 | |
| 126 | 2017 _asm |
| 167 | 2018 movlw 0x00 |
| 2019 movwf TBLPTRU,0 | |
| 2020 movlw 0x00 | |
| 2021 movwf TBLPTRH,0 | |
| 2022 movlw 0x00 | |
| 2023 movwf TBLPTRL,0 | |
| 126 | 2024 _endasm |
| 167 | 2025 |
| 126 | 2026 // cycle buffers |
| 2027 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
| 2028 { | |
| 2029 md_t = 0; | |
| 2030 for (md_i=0;md_i<16;md_i++) | |
| 2031 { | |
| 2032 if(md_pointer == 9) | |
| 164 | 2033 md_temp = char_O_hash[md_i]; |
| 126 | 2034 else |
| 2035 { | |
| 2036 _asm | |
| 167 | 2037 TBLRDPOSTINC |
| 2038 movff TABLAT,md_temp | |
| 126 | 2039 _endasm |
| 2040 } // else | |
| 167 | 2041 |
| 2042 md_buffer[md_i] = md_temp; | |
| 186 | 2043 md_state[md_i+16] = md_temp; |
| 2044 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
| 126 | 2045 } // for md_i 16 |
| 2046 | |
| 2047 for (md_i=0;md_i<18;md_i++) | |
| 2048 { | |
| 2049 for (md_j=0;md_j<48;md_j++) | |
| 2050 { | |
| 167 | 2051 md_state[md_j] ^= md_pi_subst[md_t]; |
| 126 | 2052 md_t = md_state[md_j]; |
| 2053 } // for md_j 48 | |
| 2054 md_t = (unsigned char)(md_t+1); | |
| 2055 } // for md_i 18 | |
| 164 | 2056 md_t = char_O_hash[15]; |
| 126 | 2057 |
| 2058 for (md_i=0;md_i<16;md_i++) | |
| 2059 { | |
| 167 | 2060 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
| 164 | 2061 md_t = char_O_hash[md_i]; |
| 126 | 2062 } // for md_i 16 |
| 2063 } // for md_pointer | |
| 116 | 2064 } // void deco_hash(void) |
| 184 | 2065 #endif |
| 116 | 2066 |
| 167 | 2067 ////////////////////////////////////////////////////////////////////////////// |
| 2068 // deco_clear_CNS_fraction | |
| 2069 // | |
| 116 | 2070 // new in v.101 |
| 167 | 2071 // |
| 116 | 2072 void deco_clear_CNS_fraction(void) |
| 2073 { | |
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2074 RESET_C_STACK |
| 237 | 2075 |
| 126 | 2076 CNS_fraction = 0.0; |
| 2077 char_O_CNS_fraction = 0; | |
| 167 | 2078 } |
| 116 | 2079 |
| 167 | 2080 ////////////////////////////////////////////////////////////////////////////// |
| 2081 // deco_calc_CNS_fraction | |
| 2082 // | |
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2083 // Input: char_I_actual_ppO2 : Current condition (in decibars). |
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2084 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. |
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2085 // CNS_fraction : velue before period. |
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2086 // Output: CNS_fraction, char_O_CNS_fraction |
| 167 | 2087 // |
| 116 | 2088 void deco_calc_CNS_fraction(void) |
| 2089 { | |
| 292 | 2090 overlay float time_factor = 1.0f; |
| 126 | 2091 RESET_C_STACK |
| 167 | 2092 |
| 471 | 2093 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
| 237 | 2094 assert( char_I_actual_ppO2 > 15 ); |
| 2095 | |
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2096 if( char_I_step_is_1min == 1 ) |
| 292 | 2097 time_factor = 30.0f; |
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2098 else if( char_I_step_is_1min == 2 ) |
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2099 time_factor = 300.0f; |
| 116 | 2100 |
| 126 | 2101 if (char_I_actual_ppO2 < 50) |
| 292 | 2102 ; // no changes |
| 126 | 2103 else if (char_I_actual_ppO2 < 60) |
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2104 CNS_fraction += time_factor/(-540.0 * char_I_actual_ppO2 + 54000.0); |
| 126 | 2105 else if (char_I_actual_ppO2 < 70) |
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2106 CNS_fraction += time_factor/(-450.0 * char_I_actual_ppO2 + 48600.0); |
| 126 | 2107 else if (char_I_actual_ppO2 < 80) |
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2108 CNS_fraction += time_factor/(-360.0 * char_I_actual_ppO2 + 42300.0); |
| 126 | 2109 else if (char_I_actual_ppO2 < 90) |
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2110 CNS_fraction += time_factor/(-270.0 * char_I_actual_ppO2 + 35100.0); |
| 126 | 2111 else if (char_I_actual_ppO2 < 110) |
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2112 CNS_fraction += time_factor/(-180.0 * char_I_actual_ppO2 + 27000.0); |
| 126 | 2113 else if (char_I_actual_ppO2 < 150) |
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2114 CNS_fraction += time_factor/( -90.0 * char_I_actual_ppO2 + 17100.0); |
| 126 | 2115 else if (char_I_actual_ppO2 < 160) |
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2116 CNS_fraction += time_factor/(-225.0 * char_I_actual_ppO2 + 37350.0); |
| 126 | 2117 else if (char_I_actual_ppO2 < 165) |
| 292 | 2118 CNS_fraction += time_factor*0.000755; // Arieli et all.(2002): Modeling pulmonary and CNS O2 toxicity... Formula (A1) based on value for 1.55 and c=20 |
| 126 | 2119 else if (char_I_actual_ppO2 < 170) |
| 292 | 2120 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
| 126 | 2121 else if (char_I_actual_ppO2 < 175) |
| 292 | 2122 CNS_fraction += time_factor*0.00136; |
| 126 | 2123 else if (char_I_actual_ppO2 < 180) |
| 292 | 2124 CNS_fraction += time_factor*0.00180; |
| 126 | 2125 else if (char_I_actual_ppO2 < 185) |
| 292 | 2126 CNS_fraction += time_factor*0.00237; |
| 126 | 2127 else if (char_I_actual_ppO2 < 190) |
| 292 | 2128 CNS_fraction += time_factor*0.00310; |
| 126 | 2129 else if (char_I_actual_ppO2 < 195) |
| 292 | 2130 CNS_fraction += time_factor*0.00401; |
| 126 | 2131 else if (char_I_actual_ppO2 < 200) |
| 292 | 2132 CNS_fraction += time_factor*0.00517; |
| 126 | 2133 else if (char_I_actual_ppO2 < 230) |
| 292 | 2134 CNS_fraction += time_factor*0.0209; |
| 126 | 2135 else |
| 292 | 2136 CNS_fraction += time_factor*0.0482; // value for 2.5 |
| 116 | 2137 |
| 514 | 2138 if( CNS_fraction > 2.5 ) |
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2139 CNS_fraction = 2.55; |
| 514 | 2140 if( CNS_fraction < 0.0 ) |
| 126 | 2141 CNS_fraction = 0.0; |
| 2142 | |
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2143 char_O_CNS_fraction = (unsigned char)(100.0 * CNS_fraction + 0.5); |
| 167 | 2144 } |
| 116 | 2145 |
| 167 | 2146 ////////////////////////////////////////////////////////////////////////////// |
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2147 // deco_calc_CNS_planning |
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2148 // |
|
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2149 // Compute CNS during predicted ascent. |
| 488 | 2150 // |
| 2151 // Note: Needs a call to deco_push_tissues_to_vault(), | |
| 2152 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
| 2153 // | |
| 2154 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
| 2155 // Output: CNS_fraction, char_O_CNS_fraction | |
| 2156 // | |
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2157 void deco_calc_CNS_planning(void) |
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2158 { |
|
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2159 overlay unsigned char backup_gas_last_depth; |
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2160 overlay unsigned char backup_gas_last_used; |
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2161 overlay unsigned short backup_gas_delay; |
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2162 overlay unsigned short backup_dive_mins; |
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2163 overlay unsigned char backup_actual_ppO2; |
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2164 |
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2165 RESET_C_STACK |
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2166 |
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2167 // Backup state machine |
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2168 backup_gas_last_depth = sim_gas_last_depth; |
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2169 backup_gas_last_used = sim_gas_last_used; |
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2170 backup_gas_delay = sim_gas_delay; |
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2171 backup_dive_mins = sim_dive_mins; |
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2172 backup_actual_ppO2 = char_I_actual_ppO2; |
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2173 |
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2174 // Uses 1min CNS period: |
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2175 char_I_step_is_1min = 1; |
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2176 |
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2177 //---- Retrieve bottom Gas used, and set variables. |
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2178 sim_gas_last_used = char_I_first_gas; |
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2179 sim_gas_last_depth = 0; // Surface gas marker. |
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2180 gas_switch_set(); // Sets initial calc_N2/He_ratio |
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2181 |
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2182 //---- CCR mode : do the full TTS at once -------------------------------- |
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2183 if( char_I_const_ppO2 != 0 ) |
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2184 { |
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2185 overlay unsigned short t; // Needs 16bits here ! |
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2186 char_I_actual_ppO2 = char_I_const_ppO2; |
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2187 for(t=0; t<int_O_ascenttime; ++t) |
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2188 deco_calc_CNS_fraction(); |
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2189 } |
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2190 else //---- OC mode : have to follow all gas switches... ----------------- |
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2191 { |
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2192 overlay unsigned char i = 0; // Decostop loop counter |
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2193 overlay float actual_ppO2; |
|
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2194 overlay unsigned char time, t; |
| 563 | 2195 overlay unsigned char deepest_first = (read_custom_function(54) == 0); |
|
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2196 |
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2197 //---- Ascent to surface delay |
|
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2198 // NOTE: count as if time is spent with bottom pressure, |
|
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2199 // AND the bottom gas |
|
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2200 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) |
|
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2201 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2202 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
|
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2203 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
|
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2204 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
|
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2205 |
|
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|
2206 // Ascent time (rounded up): |
|
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2207 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); |
|
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2208 |
|
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|
2209 for(t=0; t<time; ++t) |
|
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2210 { |
|
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|
2211 deco_calc_CNS_fraction(); |
|
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2212 sim_dive_mins++; |
|
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2213 } |
|
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2214 |
| 563 | 2215 //---- Do all further stops ------------------------------------------ |
|
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2216 for(i=0; i<NUM_STOPS; ++i) |
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2217 { |
| 563 | 2218 overlay unsigned char switch_gas; |
| 2219 | |
| 2220 //---- Get next stop, possibly in reverse order ------------------ | |
| 2221 if( deepest_first ) | |
| 2222 { | |
| 2223 time = char_O_deco_time[i]; | |
| 2224 temp_depth_limit = char_O_deco_depth[i]; | |
| 2225 } | |
| 2226 else | |
| 2227 { | |
| 2228 time = char_O_deco_time[(NUM_STOPS-1)-i]; | |
| 2229 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i]; | |
| 2230 } | |
| 2231 if( time == 0 ) continue; | |
|
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2232 |
| 563 | 2233 //---- Gas Switch ? ---------------------------------------------- |
| 2234 switch_gas = temp_depth_limit & 0x80; // Switch flag. | |
| 2235 temp_depth_limit &= 0x7F; // True stop depth. | |
| 2236 | |
| 2237 if( switch_gas ) | |
| 2238 { | |
| 2239 gas_switch_deepest(); | |
| 2240 gas_switch_set(); | |
| 2241 } | |
| 2242 | |
| 2243 //---- Convert Depth and N2_ratio to ppO2 ------------------------ | |
|
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|
2244 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) |
|
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2245 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2246 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2247 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
|
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2248 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2249 |
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|
2250 //---- Apply the stop |
|
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2251 for(t=0; t<time; ++t) |
|
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2252 { |
|
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|
2253 deco_calc_CNS_fraction(); |
|
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|
2254 sim_dive_mins++; |
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2255 } |
|
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|
2256 } |
| 488 | 2257 } |
| 2258 | |
| 563 | 2259 //---- Back to normal mode... -------------------------------------------- |
| 488 | 2260 char_I_step_is_1min = 0; |
|
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|
2261 sim_gas_last_depth = backup_gas_last_depth; |
|
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|
2262 sim_gas_last_used = backup_gas_last_used; |
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|
2263 sim_gas_delay = backup_gas_delay; |
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|
2264 sim_dive_mins = backup_dive_mins; |
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|
2265 char_I_actual_ppO2 = backup_actual_ppO2; |
|
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2266 } |
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2267 |
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|
2268 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 2269 // deco_calc_CNS_decrease_15min |
| 2270 // | |
| 116 | 2271 // new in v.101 |
| 167 | 2272 // |
| 116 | 2273 // calculates the half time of 90 minutes in 6 steps of 15 min |
| 200 | 2274 // (Used in sleepmode, for low battery mode). |
| 167 | 2275 // |
| 116 | 2276 // Output: char_O_CNS_fraction |
| 2277 // Uses and Updates: CNS_fraction | |
| 167 | 2278 // |
| 116 | 2279 void deco_calc_CNS_decrease_15min(void) |
| 2280 { | |
| 237 | 2281 RESET_C_STACK |
| 514 | 2282 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
| 237 | 2283 |
| 126 | 2284 CNS_fraction = 0.890899 * CNS_fraction; |
| 514 | 2285 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
| 167 | 2286 } |
| 116 | 2287 |
| 167 | 2288 ////////////////////////////////////////////////////////////////////////////// |
| 2289 // deco_calc_percentage | |
| 2290 // | |
| 116 | 2291 // new in v.101 |
| 167 | 2292 // |
| 116 | 2293 // calculates int_I_temp * char_I_temp / 100 |
| 2294 // output is int_I_temp | |
| 200 | 2295 // |
| 2296 // Used to compute NoFly remaining time. | |
|
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2297 // |
| 116 | 2298 void deco_calc_percentage(void) |
| 2299 { | |
|
122
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|
2300 RESET_C_STACK |
|
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2301 |
| 237 | 2302 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
| 564 | 2303 assert( int_I_temp < 5760 ); // Less than 4 days = 96h... |
| 237 | 2304 |
|
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|
2305 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
| 237 | 2306 |
|
554
896b6346ccd2
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|
2307 assert( int_I_temp < 5760 ); // Less than 96h too... |
|
222
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2308 } |
|
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2309 |
|
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|
2310 |
|
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|
2311 ////////////////////////////////////////////////////////////////////////////// |
|
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|
2312 // deco_gas_volumes |
|
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2313 // |
|
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2314 // new in v.111 |
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2315 // |
|
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|
2316 // calculates volumes for each gas. |
|
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2317 // |
|
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2318 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
|
240
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2319 // Gas list. |
|
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|
2320 // char_I_first_gas is the bottom gas. |
|
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2321 // decoplan (char_O_deco_depth, char_O_deco_time). |
|
234
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|
2322 // CF#54 == TRUE if shallowest stop first. |
|
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|
2323 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min. |
|
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|
2324 // CF#57 == deco liters/minutes (5 .. 50) or bar/min. |
| 224 | 2325 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
|
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2326 // |
|
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|
2327 void deco_gas_volumes(void) |
|
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|
2328 { |
| 338 | 2329 overlay float volumes[NUM_GAS]; |
|
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|
2330 overlay float bottom_usage, deco_usage; |
|
234
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2331 overlay unsigned char i, deepest_first; |
| 241 | 2332 overlay unsigned char gas; |
|
222
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|
2333 RESET_C_STACK |
|
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2334 |
|
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|
2335 //---- initialize with bottom consumption -------------------------------- |
| 338 | 2336 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
|
240
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|
2337 volumes[i] = 0.0; |
|
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2338 |
| 338 | 2339 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
| 241 | 2340 gas = char_I_first_gas - 1; |
| 2341 | |
|
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|
2342 bottom_usage = (float) read_custom_function(56); |
|
580
32448d5ca734
BUGFIX: GasVolume should not count bottom time/depth in CCR mode.
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|
2343 if( char_I_const_ppO2 == 0 && bottom_usage > 0.0 ) |
| 265 | 2344 volumes[gas] |
| 2345 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
| 2346 * char_I_bottom_time // in minutes. | |
| 2347 * bottom_usage; // In liter/minutes. | |
|
579
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|
2348 |
|
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|
2349 //---- Starts by a gas switch ? ------------------------------------------ |
|
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|
2350 // If there is no special gas-switch stops inserted, then |
|
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|
2351 // we should pay attention to the gas when starting to ascent, before |
|
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diff
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|
2352 // the first stop... |
|
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|
2353 if( read_custom_function(55) == 0 ) |
|
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|
2354 { |
|
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|
2355 overlay unsigned char j; |
|
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|
2356 for(j=0; j<NUM_GAS; ++j) |
|
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|
2357 { |
|
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|
2358 if( char_O_first_deco_depth < char_I_deco_gas_change[j] ) |
|
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|
2359 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
|
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diff
changeset
|
2360 gas = j; |
|
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|
2361 } |
|
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changeset
|
2362 } |
|
222
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2363 |
|
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|
2364 //---- Ascent usage ------------------------------------------------------ |
|
234
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|
2365 deepest_first = read_custom_function(54) == 0; |
|
511
2a6293641d51
NEW NDL NDL faster/more precise simu (but no closed formula for trimix).
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|
2366 deco_usage = (float) read_custom_function(57); // In liter/minutes. |
|
222
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2367 |
| 224 | 2368 // Usage up to the first stop: |
| 2369 // - computed at MAX depth (easier, safer), | |
|
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2370 // - with an ascent speed of 10m/min. |
| 224 | 2371 // - with ascent litter / minutes. |
|
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2372 // - still using bottom gas: |
|
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2373 if( deco_usage > 0.0 ) |
| 265 | 2374 volumes[gas] |
| 2375 += (char_I_bottom_depth*0.1 + 1.0) // Depth -> bar | |
| 2376 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 // ascent time (min) | |
|
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2377 * deco_usage; // Consumption ( xxx / min @ 1 bar) |
|
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2378 |
| 338 | 2379 for(i=0; i<NUM_STOPS; ++i) |
|
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2380 { |
| 241 | 2381 overlay unsigned char j; |
|
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2382 overlay unsigned char depth, time, ascent; |
|
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2383 |
|
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2384 // Manage stops in reverse order (CF#54) |
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2385 if( deepest_first ) |
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2386 { |
| 241 | 2387 time = char_O_deco_time[i]; |
|
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2388 if( time == 0 ) break; // End of table: done. |
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2389 |
|
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2390 ascent = depth = char_O_deco_depth[i] & 0x7F; |
|
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2391 if( i < 31 ) |
|
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2392 ascent -= char_O_deco_depth[i+1] & 0x7F; |
|
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2393 } |
|
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2394 else |
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2395 { |
|
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2396 time = char_O_deco_time[31-i]; |
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2397 if( time == 0 ) continue; // not yet: still searh table. |
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2398 |
|
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2399 ascent = depth = char_O_deco_depth[31-i] & 0x7F; |
|
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2400 if( i < 31 ) |
|
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2401 ascent -= char_O_deco_depth[30-i] & 0x7F; |
|
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2402 } |
|
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2403 |
|
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2404 // Gas switch depth ? |
| 338 | 2405 for(j=0; j<NUM_GAS; ++j) |
|
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2406 { |
|
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2407 if( depth <= char_I_deco_gas_change[j] ) |
| 241 | 2408 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
| 224 | 2409 gas = j; |
|
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2410 } |
|
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2411 |
|
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2412 // usage during stop: |
| 224 | 2413 // Note: because first gas is not in there, increment gas+1 |
|
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2414 if( deco_usage > 0.0 ) |
| 265 | 2415 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
| 2416 * time // in minutes. | |
|
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2417 * deco_usage // in xxx / min @ 1bar. |
| 265 | 2418 // Plus usage during ascent to the next stop, at 10m/min. |
| 2419 + (depth*0.1 + 1.0) | |
|
275
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2420 * ascent*0.1 // metre --> min |
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2421 * deco_usage; |
| 265 | 2422 else |
| 2423 volumes[gas] = 65535.0; | |
|
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2424 } |
|
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2425 |
|
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2426 //---- convert results for the ASM interface ----------------------------- |
| 338 | 2427 for(i=0; i<NUM_GAS; ++i) |
|
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2428 if( volumes[i] > 65534.0 ) |
| 224 | 2429 int_O_gas_volumes[i] = 65535; |
|
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2430 else |
|
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2431 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); |
| 116 | 2432 } |
| 2433 | |
| 167 | 2434 ////////////////////////////////////////////////////////////////////////////// |
| 2435 | |
| 116 | 2436 void deco_push_tissues_to_vault(void) |
| 2437 { | |
| 167 | 2438 overlay unsigned char x; |
|
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2439 RESET_C_STACK |
| 167 | 2440 |
| 116 | 2441 cns_vault = CNS_fraction; |
| 339 | 2442 for (x=0;x<NUM_COMP;x++) |
| 2443 { | |
| 2444 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
| 2445 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
| 2446 } | |
| 116 | 2447 } |
| 167 | 2448 |
| 116 | 2449 void deco_pull_tissues_from_vault(void) |
| 2450 { | |
| 167 | 2451 overlay unsigned char x; |
|
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2452 RESET_C_STACK |
| 167 | 2453 |
| 339 | 2454 for (x=0; x<NUM_COMP; x++) |
| 2455 { | |
| 2456 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
| 2457 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
| 2458 } | |
| 292 | 2459 |
| 2460 // Restore both CNS variable, too. | |
| 2461 CNS_fraction = cns_vault; | |
| 514 | 2462 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
| 116 | 2463 } |
| 2464 | |
| 167 | 2465 ////////////////////////////////////////////////////////////////////////////// |
| 2466 // | |
| 184 | 2467 #ifndef CROSS_COMPILE |
| 2468 void main() {} | |
| 2469 #endif |