Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 562:56753ea6a791 bug_deco_clearing_missed_stops
Cleaning LOW gf reference in deco model
| author | JeanDo |
|---|---|
| date | Sat, 25 Feb 2012 15:13:26 +0100 |
| parents | 57622cb0d80f |
| children | 7bec4cf28cc7 |
| 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 temp_limit; | |
| 159 static float GF_low; | |
| 160 static float GF_high; | |
| 161 static float GF_delta; | |
| 192 | 162 static float locked_GF_step; // GF_delta / low_depth |
| 163 | |
| 164 static unsigned char temp_depth_limit; | |
| 562 | 165 static unsigned char low_depth; // Depth of deepest stop |
| 171 | 166 |
| 192 | 167 // Simulation context: used to predict ascent. |
| 168 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 169 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 116 | 170 |
| 192 | 171 // Real context: what we are doing now. |
| 172 static float calc_lead_tissue_limit; // | |
| 116 | 173 |
| 338 | 174 static unsigned char internal_deco_time[NUM_STOPS]; |
| 175 static unsigned char internal_deco_depth[NUM_STOPS]; | |
| 116 | 176 |
| 177 static float cns_vault; | |
| 339 | 178 static float pres_tissue_N2_vault[NUM_COMP]; |
| 179 static float pres_tissue_He_vault[NUM_COMP]; | |
| 116 | 180 |
| 163 | 181 //---- Bank 5 parameters ----------------------------------------------------- |
| 182 #pragma udata bank5=0x500 | |
| 183 | |
| 167 | 184 static unsigned char ci; |
| 116 | 185 static float pres_respiration; |
| 186 static float pres_surface; | |
| 187 static float temp_deco; | |
| 236 | 188 static float ppN2; |
| 200 | 189 static float ppHe; |
| 116 | 190 static float temp_tissue; |
| 200 | 191 static float N2_ratio; // Breathed gas nitrogen ratio. |
| 192 static float He_ratio; // Breathed gas helium ratio. | |
| 193 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
| 194 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
| 195 static float var_He_a; // Bühlmann a, for current He tissue. | |
| 196 static float var_He_b; // Bühlmann b, for current He tissue. | |
| 197 static float var_N2_e; // Exposition, for current N2 tissue. | |
| 198 static float var_He_e; // Exposition, for current He tissue. | |
| 509 | 199 static float var_N2_ht; // Half-time for current N2 tissue. |
| 200 static float var_He_ht; // Half-time for current N2 tissue. | |
| 116 | 201 |
| 338 | 202 static float pres_diluent; // new in v.101 |
| 203 static float const_ppO2; // new in v.101 | |
| 116 | 204 |
| 241 | 205 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
| 206 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
| 203 | 207 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
| 208 static unsigned short sim_dive_mins; // Simulated dive time. | |
| 200 | 209 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
| 210 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
| 211 static float CNS_fraction; // new in v.101 | |
| 212 static float float_saturation_multiplier; // new in v.101 | |
| 213 static float float_desaturation_multiplier; // new in v.101 | |
| 338 | 214 static float float_deco_distance; // new in v.101 |
| 215 static char flag_in_divemode; // new in v.108 | |
| 167 | 216 |
| 338 | 217 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
| 167 | 218 |
| 163 | 219 //---- Bank 6 parameters ----------------------------------------------------- |
| 220 #pragma udata bank6=0x600 | |
| 116 | 221 |
| 339 | 222 float pres_tissue_N2[NUM_COMP]; |
| 223 float pres_tissue_He[NUM_COMP]; | |
| 509 | 224 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. |
| 225 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
| 116 | 226 |
| 163 | 227 //---- Bank 7 parameters ----------------------------------------------------- |
| 228 #pragma udata bank7=0x700 | |
| 509 | 229 // EMPTY ... |
| 116 | 230 |
| 163 | 231 //---- Bank 8 parameters ----------------------------------------------------- |
| 116 | 232 #pragma udata bank8=0x800 |
| 163 | 233 |
| 116 | 234 static char md_pi_subst[256]; |
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235 #define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
| 116 | 236 |
| 163 | 237 //---- Bank 9 parameters ----------------------------------------------------- |
| 167 | 238 #pragma udata bank9=0x900 |
| 116 | 239 |
| 163 | 240 static char md_state[48]; // DONT MOVE !! // has to be at the beginning of bank 9 for the asm code!!! |
| 116 | 241 |
| 167 | 242 ////////////////////////////////////////////////////////////////////////////// |
| 243 ////////////////////////////////////////////////////////////////////////////// | |
| 244 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 245 ////////////////////////////////////////////////////////////////////////////// | |
| 246 ////////////////////////////////////////////////////////////////////////////// | |
| 247 // | |
| 248 // End of PROM code is 17F00, So push tables on PROM top... | |
| 249 // | |
| 250 #pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. | |
| 251 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) | |
| 116 | 252 |
| 167 | 253 // Magic table to compute the MD2 HASH |
| 254 // | |
| 255 #pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... | |
| 203 | 256 rom const rom unsigned short md_pi[] = |
| 116 | 257 { |
| 258 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 | |
| 259 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA | |
| 260 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 | |
| 261 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A | |
| 262 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 | |
| 263 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 | |
| 264 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 | |
| 265 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 | |
| 266 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 | |
| 267 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F | |
| 268 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 | |
| 269 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 | |
| 270 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A | |
| 271 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 | |
| 272 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A | |
| 273 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 | |
| 274 }; | |
| 275 | |
| 167 | 276 ////////////////////////////////////////////////////////////////////////////// |
| 277 ////////////////////////////////////////////////////////////////////////////// | |
| 278 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 279 ////////////////////////////////////////////////////////////////////////////// | |
| 280 ////////////////////////////////////////////////////////////////////////////// | |
| 281 // | |
| 116 | 282 // all new in v.102 |
| 283 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 284 | |
| 285 #pragma code p2_deco = 0x0C000 | |
| 286 | |
| 167 | 287 ////////////////////////////////////////////////////////////////////////////// |
| 288 ////////////////////////////////////////////////////////////////////////////// | |
| 289 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 290 ////////////////////////////////////////////////////////////////////////////// | |
| 291 ////////////////////////////////////////////////////////////////////////////// | |
| 292 | |
| 235 | 293 ////////////////////////////////////////////////////////////////////////////// |
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294 // Bump to blue-screen when an assert is wrong |
| 235 | 295 #ifdef __DEBUG |
| 296 void assert_failed(PARAMETER short int line) | |
| 297 { | |
| 298 extern void PLED_resetdebugger(void); | |
| 299 extern unsigned short temp10; | |
| 300 | |
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301 temp10 = line; // Show source line number as stack depth. |
| 235 | 302 PLED_resetdebugger(); |
| 303 } | |
| 304 #endif | |
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305 |
| 235 | 306 ////////////////////////////////////////////////////////////////////////////// |
| 307 // When calling C code from ASM context, the data stack pointer and | |
| 308 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
| 309 | |
| 310 #ifdef CROSS_COMPILE | |
| 311 # define RESET_C_STACK | |
| 312 #else | |
| 313 # ifdef __DEBUG | |
| 314 # define RESET_C_STACK fillDataStack(); | |
| 315 void fillDataStack(void) | |
| 316 { | |
| 317 _asm | |
| 318 LFSR 1,C_STACK | |
| 319 MOVLW 0xCC | |
| 320 loop: MOVWF POSTINC1,0 | |
| 321 TSTFSZ FSR1L,0 | |
| 322 BRA loop | |
| 323 | |
| 324 LFSR 1,C_STACK | |
| 325 LFSR 2,C_STACK | |
| 326 _endasm | |
| 327 } | |
| 328 # else | |
| 329 # define RESET_C_STACK \ | |
| 330 _asm \ | |
| 331 LFSR 1, C_STACK \ | |
| 332 LFSR 2, C_STACK \ | |
| 333 _endasm | |
| 334 # endif | |
| 335 #endif | |
| 336 | |
| 337 ////////////////////////////////////////////////////////////////////////////// | |
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338 // Read CF values from the C code. |
| 235 | 339 |
| 488 | 340 #ifdef CROSS_COMPILE |
| 341 // Full description of the OSTC EEPROM map, including CF values. | |
| 342 # include "OSTC_eeprom.h" | |
| 343 #endif | |
| 344 | |
| 203 | 345 static short read_custom_function(PARAMETER unsigned char cf) |
| 167 | 346 { |
| 184 | 347 #ifdef CROSS_COMPILE |
| 488 | 348 return (cf & 32) ? eeprom.bank1_CF[cf-32].value |
| 349 : eeprom.bank0_CF[cf ].value; | |
| 184 | 350 #else |
| 167 | 351 extern unsigned char hi, lo; |
| 352 extern void getcustom15(); | |
| 353 _asm | |
| 354 movff cf,WREG | |
| 355 call getcustom15,0 | |
| 356 movff lo,PRODL | |
| 357 movff hi,PRODH | |
| 358 _endasm | |
| 184 | 359 #endif |
| 167 | 360 } |
| 361 | |
| 362 ////////////////////////////////////////////////////////////////////////////// | |
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363 // Fast subroutine to read RTC timer 3. |
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364 // Note: result is in 1/32 of msecs. |
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365 static unsigned short tmr3(void) |
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366 { |
| 261 | 367 #ifndef CROSS_COMPILE |
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368 _asm |
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369 movff 0xfb2,PRODL // TMR3L |
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370 movff 0xfb3,PRODH // TMR3H |
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371 _endasm // result in PRODH:PRODL. |
| 261 | 372 #else |
| 373 return 0; | |
| 374 #endif | |
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375 } |
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376 |
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377 ////////////////////////////////////////////////////////////////////////////// |
| 258 | 378 // read buhlmann tables A and B for compatriment ci |
| 379 // | |
| 380 static void read_buhlmann_coefficients(void) | |
| 165 | 381 { |
| 184 | 382 #ifndef CROSS_COMPILE |
| 167 | 383 // Note: we don't use far rom pointer, because the |
| 338 | 384 // 24 bits is too complex, hence we have to set |
| 167 | 385 // the UPPER page ourself... |
| 386 // --> Set zero if tables are moved to lower pages ! | |
| 387 _asm | |
| 388 movlw 1 | |
| 389 movwf TBLPTRU,0 | |
| 390 _endasm | |
| 184 | 391 #endif |
| 258 | 392 |
| 338 | 393 assert( 0 <= ci && ci < NUM_COMP ); |
| 394 | |
| 395 // Use an interleaved array (AoS) to access coefficients with a | |
| 396 // single addressing. | |
| 397 { | |
| 398 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
| 399 var_N2_a = *ptr++; | |
| 400 var_N2_b = *ptr++; | |
| 401 var_He_a = *ptr++; | |
| 402 var_He_b = *ptr++; | |
| 403 } | |
| 258 | 404 } |
| 405 | |
| 406 ////////////////////////////////////////////////////////////////////////////// | |
| 407 // read buhlmann tables for compatriment ci | |
| 408 // If period == 0 : 2sec interval | |
| 409 // 1 : 1 min interval | |
| 410 // 2 : 10 min interval. | |
| 411 static void read_buhlmann_times(PARAMETER char period) | |
| 412 { | |
| 413 #ifndef CROSS_COMPILE | |
| 414 // Note: we don't use far rom pointer, because the | |
| 415 // 24 bits is to complex, hence we have to set | |
| 416 // the UPPER page ourself... | |
| 417 // --> Set zero if tables are moved to lower pages ! | |
| 418 _asm | |
| 419 movlw 1 | |
| 420 movwf TBLPTRU,0 | |
| 421 _endasm | |
| 422 #endif | |
| 338 | 423 |
| 424 assert( 0 <= ci && ci < NUM_COMP ); | |
| 258 | 425 |
| 165 | 426 // Integration intervals. |
| 167 | 427 switch(period) |
| 165 | 428 { |
| 429 case 0: //---- 2 sec ----------------------------------------------------- | |
| 338 | 430 { |
| 431 overlay rom const float* ptr = &e2secs[2*ci]; | |
| 432 var_N2_e = *ptr++; | |
| 433 var_He_e = *ptr++; | |
| 434 } | |
| 165 | 435 break; |
| 436 | |
| 437 case 1: //---- 1 min ----------------------------------------------------- | |
| 338 | 438 { |
| 439 overlay rom const float* ptr = &e1min[2*ci]; | |
| 440 var_N2_e = *ptr++; | |
| 441 var_He_e = *ptr++; | |
| 442 } | |
| 165 | 443 break; |
| 444 | |
| 445 case 2: //---- 10 min ---------------------------------------------------- | |
| 338 | 446 { |
| 447 overlay rom const float* ptr = &e10min[2*ci]; | |
| 448 var_N2_e = *ptr++; | |
| 449 var_He_e = *ptr++; | |
| 450 } | |
| 165 | 451 break; |
| 197 | 452 |
| 453 default: | |
| 527 | 454 assert(0); // Never go there... |
| 165 | 455 } |
| 456 } | |
| 457 | |
| 458 ////////////////////////////////////////////////////////////////////////////// | |
| 509 | 459 // read buhlmann tables for compatriment ci |
| 460 // | |
| 461 static void read_buhlmann_ht(void) | |
| 462 { | |
| 463 | |
| 464 #ifndef CROSS_COMPILE | |
| 465 // Note: we don't use far rom pointer, because the | |
| 466 // 24 bits is to complex, hence we have to set | |
| 467 // the UPPER page ourself... | |
| 468 // --> Set zero if tables are moved to lower pages ! | |
| 469 _asm | |
| 470 movlw 1 | |
| 471 movwf TBLPTRU,0 | |
| 472 _endasm | |
| 473 #endif | |
| 474 | |
| 475 assert( 0 <= ci && ci < NUM_COMP ); | |
| 476 { | |
| 477 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
| 478 var_N2_ht = *ptr++; | |
| 479 var_He_ht = *ptr++; | |
| 480 } | |
| 481 | |
| 482 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
| 483 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
| 484 } | |
| 485 | |
| 486 ////////////////////////////////////////////////////////////////////////////// | |
|
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487 // calc_nextdecodepth |
| 165 | 488 // |
| 116 | 489 // new in v.102 |
| 165 | 490 // |
| 116 | 491 // INPUT, changing during dive: |
| 509 | 492 // temp_deco |
| 192 | 493 // low_depth |
| 167 | 494 // |
| 116 | 495 // INPUT, fixed during dive: |
| 167 | 496 // pres_surface |
| 497 // GF_delta | |
| 498 // GF_high | |
| 499 // GF_low | |
| 171 | 500 // char_I_depth_last_deco |
| 167 | 501 // float_deco_distance |
| 502 // | |
| 241 | 503 // RETURN TRUE iff a stop is needed. |
| 504 // | |
| 116 | 505 // OUTPUT |
| 171 | 506 // locked_GF_step |
| 167 | 507 // temp_depth_limt |
| 192 | 508 // low_depth |
| 167 | 509 // |
| 241 | 510 static unsigned char calc_nextdecodepth(void) |
| 167 | 511 { |
| 241 | 512 //--- Max ascent speed --------------------------------------------------- |
| 513 // Recompute leading gas limit, at current depth: | |
| 317 | 514 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
| 241 | 515 |
| 516 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 302 | 517 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
| 241 | 518 |
| 519 // Do we need to stop at current depth ? | |
| 520 overlay unsigned char need_stop = 0; | |
| 521 | |
| 522 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 523 | |
| 212 | 524 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
| 509 | 525 if( char_I_deco_model != 0 ) |
| 116 | 526 { |
| 562 | 527 overlay unsigned char first_stop = 0; |
| 528 overlay float p; | |
| 529 | |
| 241 | 530 if( depth >= low_depth ) |
| 192 | 531 sim_limit( GF_low ); |
| 532 else | |
| 533 sim_limit( GF_high - depth * locked_GF_step ); | |
| 534 | |
| 562 | 535 p = sim_lead_tissue_limit - pres_surface; |
| 536 if( p <= 0.0f ) | |
| 537 goto no_deco_stop; // We can surface directly... | |
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538 |
| 562 | 539 p *= BAR_TO_METER; |
| 540 if( p < min_depth ) | |
| 541 goto no_deco_stop; // First stop is higher than 1' ascent. | |
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542 |
| 562 | 543 first_stop = 3 * (short)(0.99999 + p*0.333333); |
| 544 assert( first_stop < 128 ); | |
| 545 | |
| 546 // Apply correction for the shallowest stop. | |
| 547 if( first_stop == 3 ) // new in v104 | |
| 548 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 171 | 549 |
| 562 | 550 // Store the deepest point needing a deco stop as the LOW reference for GF. |
| 551 // NOTE: following stops will be validated using this LOW-HIGH gf scale, | |
| 552 // so if we want to keep coherency, we should not validate this stop | |
| 553 // yet, but apply the search as all the following stops afterward. | |
| 554 if( first_stop > low_depth ) | |
| 555 { | |
| 556 low_depth = first_stop; | |
| 557 locked_GF_step = GF_delta / low_depth; | |
| 558 } | |
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559 |
| 562 | 560 // We have a stop candidate. |
| 561 // But maybe ascending to the next stop will diminish the constraint, | |
| 562 // because the GF might decrease more than the preassure gradient... | |
| 563 while(first_stop > 0) | |
| 564 { | |
| 565 overlay unsigned char next_stop; // Next depth (0..90m) | |
| 566 overlay float pres_stop; // Next pressure (bar) | |
| 171 | 567 |
| 562 | 568 // Check max speed, or reaching surface. |
| 569 if( first_stop <= min_depth ) | |
| 570 goto no_deco_stop; | |
| 171 | 571 |
| 562 | 572 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
| 573 next_stop = 0; | |
| 574 else if( first_stop == 6 ) | |
| 575 next_stop = char_I_depth_last_deco; | |
| 576 else | |
| 577 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 578 | |
| 579 // Just a check we are indeed above LOW ref. | |
| 580 assert( next_stop < low_depth ); | |
| 241 | 581 |
| 562 | 582 // Total preassure at the new stop candidate: |
| 583 pres_stop = next_stop * METER_TO_BAR | |
| 584 + pres_surface; | |
| 167 | 585 |
| 562 | 586 // Keep GF_low until a first stop depth is found: |
| 587 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 192 | 588 |
| 562 | 589 // Check upper limit (lowest pressure tolerated): |
| 590 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 591 goto deco_stop_found; | |
| 592 | |
| 593 // Else, validate that stop and loop... | |
| 594 first_stop = next_stop; | |
| 595 } | |
| 596 assert( first_stop == 0 ); | |
| 171 | 597 |
| 562 | 598 no_deco_stop: |
| 599 temp_depth_limit = 0; | |
| 600 goto done; | |
| 212 | 601 |
| 562 | 602 // next stop is the last validated depth found, aka first_stop |
| 603 deco_stop_found: | |
| 604 need_stop = 1; // Hit. | |
| 605 temp_depth_limit = first_stop; // Stop depth, in meter. | |
| 606 | |
| 607 done: | |
| 608 ; | |
| 116 | 609 } |
| 167 | 610 else //---- ZH-L16 model ------------------------------------------------- |
| 116 | 611 { |
| 192 | 612 overlay float pres_gradient; |
| 613 | |
| 614 // Original model | |
| 116 | 615 // optimized in v.101 |
| 171 | 616 // char_I_depth_last_deco included in v.101 |
| 116 | 617 |
| 192 | 618 // Compute sim_lead_tissue_limit too, but just once. |
| 619 sim_limit(1.0); | |
| 620 | |
| 621 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 167 | 622 if (pres_gradient >= 0) |
| 116 | 623 { |
| 317 | 624 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
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625 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
| 241 | 626 need_stop = 1; // Hit. |
| 627 | |
| 628 // Implement last stop at 4m/5m/6m... | |
| 629 if( temp_depth_limit == 3 ) | |
| 630 temp_depth_limit = char_I_depth_last_deco; | |
| 171 | 631 } |
| 116 | 632 else |
| 241 | 633 temp_depth_limit = 0; |
| 171 | 634 } |
| 212 | 635 |
| 217 | 636 //---- Check gas change -------------------------------------------------- |
| 241 | 637 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
| 638 | |
| 639 return need_stop; | |
| 167 | 640 } |
| 116 | 641 |
| 167 | 642 ////////////////////////////////////////////////////////////////////////////// |
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643 // copy_deco_table |
| 167 | 644 // |
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645 // Buffer the stops, once computed, so we can continue to display them |
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646 // while computing the next set. |
| 167 | 647 // |
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648 static void copy_deco_table(void) |
| 116 | 649 { |
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650 // Copy depth of the first (deepest) stop, because when reversing |
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651 // order, it will be hard to find... |
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652 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
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653 char_O_first_deco_time = internal_deco_time [0]; |
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654 |
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655 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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656 { |
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657 overlay unsigned char x, y; |
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658 |
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659 //---- First: search the first non-null depth |
| 339 | 660 for(x=(NUM_STOPS-1); x != 0; --x) |
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661 if( internal_deco_depth[x] != 0 ) break; |
| 116 | 662 |
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663 //---- Second: copy to output table (in reverse order) |
| 338 | 664 for(y=0; y<NUM_STOPS; y++, --x) |
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665 { |
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666 char_O_deco_depth[y] = internal_deco_depth[x]; |
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667 char_O_deco_time [y] = internal_deco_time [x]; |
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668 |
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669 // Stop only once the last transfer is done. |
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670 if( x == 0 ) break; |
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671 } |
| 116 | 672 |
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673 //---- Third: fill table end with null |
| 339 | 674 for(y++; y<NUM_STOPS; y++) |
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675 { |
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676 char_O_deco_time [y] = 0; |
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677 char_O_deco_depth[y] = 0; |
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678 } |
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679 } |
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680 else //---- Straight copy ------------------------------------------------ |
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681 { |
| 167 | 682 overlay unsigned char x; |
| 683 | |
| 339 | 684 for(x=0; x<NUM_STOPS; x++) |
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685 { |
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686 char_O_deco_depth[x] = internal_deco_depth[x]; |
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687 char_O_deco_time [x] = internal_deco_time [x]; |
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688 } |
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689 } |
| 167 | 690 } |
| 116 | 691 |
| 167 | 692 ////////////////////////////////////////////////////////////////////////////// |
| 116 | 693 // temp_tissue_safety // |
| 167 | 694 // |
| 116 | 695 // outsourced in v.102 |
| 167 | 696 // |
| 697 // Apply safety factors for brand ZH-L16 model. | |
| 698 // | |
| 699 static void temp_tissue_safety(void) | |
| 116 | 700 { |
| 197 | 701 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
| 702 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 703 | |
| 167 | 704 if( char_I_deco_model == 0 ) |
| 116 | 705 { |
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706 if( temp_tissue < 0.0 ) |
| 126 | 707 temp_tissue *= float_desaturation_multiplier; |
| 116 | 708 else |
| 126 | 709 temp_tissue *= float_saturation_multiplier; |
| 116 | 710 } |
| 167 | 711 } |
| 116 | 712 |
| 167 | 713 ////////////////////////////////////////////////////////////////////////////// |
| 714 ////////////////////////////////////////////////////////////////////////////// | |
| 116 | 715 // ** THE JUMP-IN CODE ** |
| 716 // ** for the asm code ** | |
| 167 | 717 ////////////////////////////////////////////////////////////////////////////// |
| 718 ////////////////////////////////////////////////////////////////////////////// | |
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719 |
| 167 | 720 ////////////////////////////////////////////////////////////////////////////// |
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721 // Called every 2 seconds during diving. |
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722 // update tissues every time. |
| 184 | 723 // |
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724 // Every 6 seconds (or slower when TTS > 16): |
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725 // - update deco table (char_O_deco_time/depth) with new values. |
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726 // - update ascent time, |
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727 // - set status to zero (so we can check there is new results). |
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728 // |
| 116 | 729 void deco_calc_hauptroutine(void) |
| 730 { | |
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731 RESET_C_STACK |
| 116 | 732 calc_hauptroutine(); |
| 733 int_O_desaturation_time = 65535; | |
| 734 } | |
| 735 | |
| 167 | 736 ////////////////////////////////////////////////////////////////////////////// |
| 184 | 737 // Reset decompression model: |
| 738 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 739 // + Reset last stop to 0m | |
| 740 // + Reset all model output. | |
| 116 | 741 void deco_clear_tissue(void) |
| 742 { | |
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743 RESET_C_STACK |
| 116 | 744 clear_tissue(); |
| 745 } | |
| 746 | |
| 167 | 747 ////////////////////////////////////////////////////////////////////////////// |
| 278 | 748 // Called every 1 min during decoplanning. |
| 749 // Update tissues for 1 min. | |
| 750 // | |
| 751 void deco_calc_tissue(void) | |
| 752 { | |
| 753 RESET_C_STACK | |
| 754 calc_hauptroutine_update_tissues(); | |
| 755 } | |
| 756 | |
| 757 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 758 |
| 116 | 759 void deco_calc_wo_deco_step_1_min(void) |
| 760 { | |
|
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761 RESET_C_STACK |
| 116 | 762 calc_wo_deco_step_1_min(); |
| 763 deco_calc_desaturation_time(); | |
| 764 } | |
| 765 | |
| 167 | 766 ////////////////////////////////////////////////////////////////////////////// |
| 767 | |
| 368 | 768 void deco_calc_dive_interval(void) |
| 769 { | |
| 770 RESET_C_STACK | |
| 771 calc_dive_interval(); | |
| 772 } | |
| 773 | |
| 241 | 774 |
| 775 ////////////////////////////////////////////////////////////////////////////// | |
| 776 // Find current gas in the list (if any). | |
| 777 // | |
| 513 | 778 // Input: char_I_current_gas = 1..6 |
| 241 | 779 // |
| 513 | 780 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. |
| 241 | 781 // |
| 782 static void gas_switch_find_current(void) | |
| 783 { | |
| 513 | 784 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
|
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785 |
| 388 | 786 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 |
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787 { |
| 388 | 788 sim_gas_last_used = char_I_current_gas; |
| 789 | |
| 790 // Note: if current is first gas, we must find it, but not set | |
| 791 // last depth change to surface. | |
| 792 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
| 793 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
| 241 | 794 } |
| 388 | 795 else |
| 796 sim_gas_last_used = 0; // Gas 6 = manual set | |
| 241 | 797 } |
| 798 | |
| 167 | 799 ////////////////////////////////////////////////////////////////////////////// |
| 217 | 800 // Find deepest available gas. |
| 201 | 801 // |
| 241 | 802 // Input: temp_depth_limit, |
| 803 // deco_gas_change[] | |
| 804 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
| 212 | 805 // |
| 241 | 806 // RETURNS TRUE if a stop is needed for gas switch. |
| 807 // | |
| 808 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
| 212 | 809 // |
| 241 | 810 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
| 811 // are null), or during the ascent to make sure we are not passing a | |
| 812 // stop (in which case both can be already set). | |
| 813 // | |
| 814 static unsigned char gas_switch_deepest(void) | |
| 201 | 815 { |
| 241 | 816 overlay unsigned char switch_deco = 0, switch_last = 0; |
| 201 | 817 |
| 818 if (char_I_const_ppO2 == 0) | |
| 819 { | |
| 225 | 820 overlay unsigned char j; |
| 821 | |
| 241 | 822 // Loop over all enabled gas, to find the deepest one, |
|
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823 // above last used gas, but below temp_depth_limit. |
| 338 | 824 for(j=0; j<NUM_GAS; ++j) |
| 225 | 825 { |
| 241 | 826 // Gas not (yet) allowed ? Skip ! |
| 827 if( temp_depth_limit > deco_gas_change[j] ) | |
| 828 continue; | |
| 829 | |
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830 // Gas deeper (or equal) than the current one ? Skip ! |
| 241 | 831 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
| 832 continue; | |
| 833 | |
| 834 // First, or deeper ? | |
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835 if( switch_deco < deco_gas_change[j] ) |
| 241 | 836 { |
| 837 switch_deco = deco_gas_change[j]; | |
| 388 | 838 switch_last = j+1; // 1..5 |
| 241 | 839 } |
| 225 | 840 } |
| 201 | 841 } |
| 842 | |
| 203 | 843 // If there is a better gas available |
| 241 | 844 if( switch_deco ) |
| 201 | 845 { |
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846 unsigned char delay = read_custom_function(55); |
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847 |
| 241 | 848 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
| 201 | 849 |
| 241 | 850 // Should restart gas-switch delay only when gas do changes... |
| 851 assert( sim_gas_delay <= sim_dive_mins ); | |
| 217 | 852 |
| 241 | 853 sim_gas_last_depth = switch_deco; |
| 854 sim_gas_last_used = switch_last; | |
|
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855 sim_gas_delay = delay |
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856 + sim_dive_mins; |
| 217 | 857 |
|
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858 if( delay ) |
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859 { |
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860 temp_depth_limit = switch_deco; |
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861 return 1; |
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862 } |
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863 else |
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864 return 0; |
| 217 | 865 } |
| 866 | |
| 241 | 867 sim_gas_delay = 0; |
| 868 return 0; | |
| 217 | 869 } |
| 870 | |
| 871 ////////////////////////////////////////////////////////////////////////////// | |
| 872 // Calculate gas switches | |
| 873 // | |
| 874 // | |
| 875 // Input: N2_ratio, He_ratio. | |
| 876 // sim_gas_last_used | |
| 877 // | |
| 878 // Output: calc_N2_ratio, calc_He_ratio | |
| 879 // | |
| 241 | 880 static void gas_switch_set(void) |
| 217 | 881 { |
| 338 | 882 assert( 0 <= sim_gas_last_used && sim_gas_last_used <= NUM_GAS ); |
| 217 | 883 |
| 388 | 884 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. |
| 224 | 885 { |
| 886 calc_N2_ratio = N2_ratio; | |
| 887 calc_He_ratio = He_ratio; | |
| 888 } | |
| 889 else | |
| 890 { | |
| 891 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
| 892 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
| 217 | 893 } |
| 201 | 894 |
| 895 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
| 896 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
| 897 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
| 898 } | |
| 899 | |
| 900 ////////////////////////////////////////////////////////////////////////////// | |
| 901 // | |
| 212 | 902 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
| 509 | 903 // temp_deco : simulated respiration pressure |
| 276 | 904 // float_deco_distance : security factor. |
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905 // Water-vapor pressure inside limbs (ppWater). |
| 212 | 906 // |
| 236 | 907 // Output: ppN2, ppHe. |
| 212 | 908 // |
| 909 static void sim_alveolar_presures(void) | |
| 201 | 910 { |
| 212 | 911 overlay float deco_diluent = temp_deco; // new in v.101 |
| 912 | |
| 276 | 913 // Take deco offset into account, but not at surface. |
| 914 // Note: this should be done on ambiant pressure, hence before | |
| 915 // computing the diluant partial pressure... | |
| 916 if( deco_diluent > pres_surface ) | |
| 917 deco_diluent += float_deco_distance; | |
| 918 | |
| 212 | 919 //---- CCR mode : deco gas switch ? -------------------------------------- |
| 276 | 920 if( char_I_const_ppO2 != 0 ) |
| 201 | 921 { |
| 276 | 922 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
| 923 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
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924 // ppWater in the equations below: |
| 321 | 925 deco_diluent -= const_ppO2; |
| 276 | 926 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
| 212 | 927 |
| 928 if (deco_diluent > temp_deco) | |
| 929 deco_diluent = temp_deco; | |
| 201 | 930 } |
| 931 | |
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932 if( deco_diluent > ppWater ) |
| 201 | 933 { |
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934 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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935 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
| 201 | 936 } |
| 937 else | |
| 938 { | |
| 236 | 939 ppN2 = 0.0; |
| 201 | 940 ppHe = 0.0; |
| 941 } | |
| 236 | 942 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
| 201 | 943 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
| 944 } | |
| 945 | |
| 946 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 947 // clear_tissue |
| 948 // | |
| 165 | 949 // optimized in v.101 (var_N2_a) |
| 167 | 950 // |
| 951 // preload tissues with standard pressure for the given ambient pressure. | |
| 952 // Note: fixed N2_ratio for standard air. | |
| 201 | 953 // |
| 167 | 954 static void clear_tissue(void) |
| 116 | 955 { |
|
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956 overlay float p; |
| 116 | 957 flag_in_divemode = 0; |
| 958 | |
| 167 | 959 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
| 960 N2_ratio = 0.7902; | |
| 212 | 961 pres_respiration = int_I_pres_respiration * 0.001; |
| 164 | 962 |
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963 p = N2_ratio * (pres_respiration - ppWater); |
| 338 | 964 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 965 { |
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966 // cycle through the 16 Bühlmann N2 tissues |
| 339 | 967 pres_tissue_N2[ci] = p; |
| 197 | 968 |
| 969 // cycle through the 16 Bühlmann tissues for Helium | |
| 339 | 970 pres_tissue_He[ci] = 0.0; |
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971 } |
| 116 | 972 |
|
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973 clear_deco_table(); |
| 126 | 974 char_O_deco_status = 0; |
| 975 char_O_nullzeit = 0; | |
| 168 | 976 int_O_ascenttime = 0; |
| 126 | 977 char_O_gradient_factor = 0; |
| 978 char_O_relative_gradient_GF = 0; | |
| 258 | 979 |
| 980 calc_lead_tissue_limit = 0.0; | |
| 981 char_O_gtissue_no = 0; | |
| 167 | 982 } |
| 116 | 983 |
| 167 | 984 ////////////////////////////////////////////////////////////////////////////// |
| 985 // calc_hauptroutine | |
| 986 // | |
| 987 // this is the major code in dive mode calculates: | |
| 116 | 988 // the tissues, |
| 167 | 989 // the bottom time, |
| 990 // and simulates the ascend with all deco stops. | |
| 171 | 991 // |
| 992 // The deco_state sequence is : | |
| 993 // 3 (at surface) | |
| 994 // +---> 0 : calc nullzeit | |
| 995 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 996 // | +-> 1 : simulate up to 16min of stops. | |
| 997 // | +------< not finished | |
| 998 // +--------< finish | |
| 999 // | |
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1000 // Added steps 6,5 for @+5 calculation: |
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1001 // 6 = ascent to first stop (same as 2), except continue to 7 |
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1002 // 7 = same as 1, except loop to 7. |
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1003 // |
| 167 | 1004 static void calc_hauptroutine(void) |
| 116 | 1005 { |
| 241 | 1006 static unsigned char backup_gas_used = 0; |
| 1007 static unsigned char backup_gas_depth = 0; | |
| 217 | 1008 static unsigned char backup_gas_delay = 0; |
| 186 | 1009 |
| 116 | 1010 calc_hauptroutine_data_input(); |
| 1011 | |
| 1012 calc_hauptroutine_update_tissues(); | |
| 1013 calc_gradient_factor(); | |
| 1014 | |
| 167 | 1015 // toggle between calculation for nullzeit (bottom time), |
| 1016 // deco stops | |
| 1017 // and more deco stops (continue) | |
| 1018 switch( char_O_deco_status ) | |
| 116 | 1019 { |
| 186 | 1020 case 3: //---- At surface: start a new dive ------------------------------ |
| 1021 clear_deco_table(); | |
| 1022 copy_deco_table(); | |
| 200 | 1023 int_O_ascenttime = 0; // Reset DTR. |
| 323 | 1024 int_O_extra_ascenttime = 0; |
| 200 | 1025 char_O_nullzeit = 0; // Reset bottom time. |
| 278 | 1026 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
| 201 | 1027 |
| 217 | 1028 // Values that should be reset just once for the full real dive. |
| 1029 // This is used to record the lowest stop for the whole dive, | |
| 1030 // Including ACCROSS all simulated ascent. | |
| 562 | 1031 // NOTE: Use a default of 6m (like the 10m in the DR5 code). |
| 1032 // Because this produces less babling stops at the | |
| 1033 // beginning of the decompression. But putting a value too high | |
| 1034 // have the immediat effect of using lower GF for shallow dives... | |
| 1035 low_depth = 6; | |
| 217 | 1036 |
| 1037 // Reset gas switch history. | |
| 241 | 1038 backup_gas_used = sim_gas_last_used = 0; |
| 1039 backup_gas_depth = sim_gas_last_depth = 0; | |
| 217 | 1040 backup_gas_delay = sim_gas_delay = 0; |
| 203 | 1041 sim_dive_mins = 0; |
| 1042 break; | |
| 186 | 1043 |
| 167 | 1044 case 0: //---- bottom time ----------------------------------------------- |
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1045 default: |
| 509 | 1046 gas_switch_find_current(); // Lookup for current gas & time. |
| 1047 gas_switch_set(); // setup calc_ratio's | |
| 1048 | |
| 167 | 1049 calc_nullzeit(); |
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1050 if( char_O_nullzeit > 0 ) // Some NDL time left ? |
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1051 { |
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1052 char_O_deco_status = 0; // YES: recalc ndl next time. |
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1053 clear_deco_table(); // Also clear stops ! |
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1054 copy_deco_table(); |
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1055 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) |
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1056 } |
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1057 else |
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1058 char_O_deco_status = 2; // NO: calc ascent next time. |
| 186 | 1059 break; |
| 1060 | |
| 1061 case 2: //---- Simulate ascent to first stop ----------------------------- | |
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1062 case 6: // @+5min variation |
| 203 | 1063 // Check proposed gas at begin of ascent simulation |
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1064 sim_dive_mins = int_I_divemins; // Init current time. |
| 241 | 1065 |
| 532 | 1066 gas_switch_find_current(); // Lookup for current gas & time. |
| 1067 gas_switch_set(); // setup calc_ratio's | |
| 1068 | |
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1069 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1070 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
| 203 | 1071 backup_gas_delay = sim_gas_delay; |
| 186 | 1072 |
| 1073 sim_ascent_to_first_stop(); | |
| 201 | 1074 |
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1075 // Calc stops next time (deco or gas switch). |
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1076 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
| 167 | 1077 break; |
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1078 |
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1079 case 1: //---- Simulate stops -------------------------------------------- |
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1080 case 5: // @+5 variation. |
| 167 | 1081 calc_hauptroutine_calc_deco(); |
| 186 | 1082 |
| 1083 // If simulation is finished, restore the GF low reference, so that | |
| 1084 // next ascent simulation is done from the current depth: | |
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1085 if( (char_O_deco_status & 3) == 0 ) |
| 186 | 1086 { |
| 241 | 1087 sim_gas_last_used = backup_gas_used; |
| 1088 sim_gas_last_depth = backup_gas_depth; | |
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1089 sim_gas_delay = backup_gas_delay; |
| 186 | 1090 } |
| 167 | 1091 break; |
| 116 | 1092 } |
| 167 | 1093 |
| 116 | 1094 } |
| 1095 | |
| 167 | 1096 ////////////////////////////////////////////////////////////////////////////// |
| 1097 // calc_hauptroutine_data_input | |
| 1098 // | |
| 1099 // Reset all C-code dive parameters from their ASM-code values. | |
| 1100 // Detect gas change condition. | |
| 1101 // | |
| 116 | 1102 void calc_hauptroutine_data_input(void) |
| 1103 { | |
| 203 | 1104 overlay short int_temp; |
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1105 overlay unsigned char g; |
| 126 | 1106 |
| 197 | 1107 pres_respiration = int_I_pres_respiration * 0.001; |
| 1108 pres_surface = int_I_pres_surface * 0.001; | |
| 1109 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1110 He_ratio = char_I_He_ratio * 0.01; | |
| 1111 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
| 116 | 1112 |
| 126 | 1113 // ____________________________________________________ |
| 1114 // | |
| 1115 // _____________ G A S _ C H A N G E S ________________ | |
| 1116 // ____________________________________________________ | |
| 1117 | |
| 212 | 1118 // Keep a margin of 150mbar = 1.50m |
| 1119 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1120 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 126 | 1121 |
| 203 | 1122 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
|
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1123 for(g=0; g < NUM_GAS; ++g) |
| 126 | 1124 { |
|
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1125 deco_gas_change[g] = 0; |
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1126 if(char_I_deco_gas_change[g]) |
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1127 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) |
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1128 deco_gas_change[g] = char_I_deco_gas_change[g]; |
| 126 | 1129 } |
| 116 | 1130 |
| 197 | 1131 const_ppO2 = char_I_const_ppO2 * 0.01; |
| 1132 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1133 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1134 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1135 GF_high = char_I_GF_High_percentage * 0.01; | |
| 126 | 1136 GF_delta = GF_high - GF_low; |
| 116 | 1137 } |
| 1138 | |
| 167 | 1139 ////////////////////////////////////////////////////////////////////////////// |
| 171 | 1140 // |
| 1141 // | |
| 116 | 1142 void calc_hauptroutine_update_tissues(void) |
| 1143 { | |
| 197 | 1144 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
| 1145 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
| 1146 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
| 237 | 1147 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1148 |
| 276 | 1149 pres_diluent = pres_respiration; |
| 307 | 1150 if( char_I_const_ppO2 != 0 ) // new in v.101 |
| 186 | 1151 { |
| 322 | 1152 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
| 1153 | |
| 276 | 1154 pres_diluent -= const_ppO2; // new in v.101 |
| 1155 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
| 321 | 1156 if( pres_diluent < 0.0 ) |
| 1157 pres_diluent = 0.0; | |
| 276 | 1158 if( pres_diluent > pres_respiration ) // new in v.101 |
| 1159 pres_diluent = pres_respiration; // new in v.101 | |
| 307 | 1160 |
| 321 | 1161 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
| 322 | 1162 |
| 326 | 1163 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
| 322 | 1164 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
| 1165 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
| 186 | 1166 } |
| 307 | 1167 |
|
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1168 if( pres_diluent > ppWater ) // new in v.101 |
| 116 | 1169 { |
| 307 | 1170 overlay float EAD, END; |
| 1171 | |
|
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1172 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1173 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
| 307 | 1174 |
| 1175 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
| 1176 // with plain air. | |
|
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1177 // ppN2 = 79% * (P_EAD - ppWater) |
| 307 | 1178 // EAD = (P_EAD - Psurface) * 10 |
|
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1179 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
| 317 | 1180 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
| 307 | 1181 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
| 317 | 1182 char_O_EAD = (unsigned char)(EAD + 0.5); |
| 307 | 1183 |
| 1184 // END : Equivalent Narcotic Dive. | |
| 1185 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
| 1186 // 0.23 btw). Hence the formula becomes: | |
|
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1187 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
| 317 | 1188 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
| 307 | 1189 // |
| 1190 // Source cited: | |
| 1191 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
| 1192 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
| 317 | 1193 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
| 307 | 1194 if( END < 0.0 || END > 245.5 ) END = 0.0; |
| 317 | 1195 char_O_END = (unsigned char)(END + 0.5); |
| 116 | 1196 } |
| 167 | 1197 else // new in v.101 |
| 116 | 1198 { |
| 236 | 1199 ppN2 = 0.0; // new in v.101 |
| 200 | 1200 ppHe = 0.0; // new in v.101 |
| 307 | 1201 char_O_EAD = char_O_END = 0; |
| 116 | 1202 } |
| 1203 | |
| 1204 if(!char_I_step_is_1min) | |
| 192 | 1205 calc_tissue(0); |
| 116 | 1206 else |
| 192 | 1207 calc_tissue(1); |
| 186 | 1208 |
| 192 | 1209 // Calc limit for surface, ie. GF_high. |
| 258 | 1210 calc_limit(); |
| 186 | 1211 |
| 203 | 1212 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
| 339 | 1213 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
| 171 | 1214 } |
| 1215 | |
| 116 | 1216 |
| 167 | 1217 ////////////////////////////////////////////////////////////////////////////// |
|
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1218 // Compute stops. |
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1219 // |
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1220 // Note: because this can be very long, break on 16 iterations, and set state |
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1221 // to 0 when finished, or to 1 when needing to continue. |
|
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1222 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
|
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1223 // break the loop when total time > 512msec. |
|
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1224 // |
| 116 | 1225 void calc_hauptroutine_calc_deco(void) |
| 1226 { | |
|
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1227 overlay unsigned char loop; |
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1228 |
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1229 for(loop = 0; loop < 16; ++loop) |
| 116 | 1230 { |
|
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1231 // Limit loops to 512ms, using the RTC timer 3: |
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1232 if( tmr3() & (512*32) ) |
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1233 break; |
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1234 |
| 241 | 1235 // Do not ascent while doing a gas switch ? |
| 203 | 1236 if( sim_gas_delay <= sim_dive_mins ) |
| 1237 { | |
| 241 | 1238 if( calc_nextdecodepth() ) |
| 1239 { | |
| 1240 if( temp_depth_limit == 0 ) | |
| 1241 goto Surface; | |
| 116 | 1242 |
| 241 | 1243 //---- We hit a stop at temp_depth_limit --------------------- |
| 317 | 1244 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
| 241 | 1245 + pres_surface; // To absolute. |
| 471 | 1246 if( !update_deco_table() ) // Adds a one minute stops. |
| 1247 goto Surface; // Deco table full: abort... | |
| 241 | 1248 } |
| 1249 else | |
| 1250 { | |
| 1251 //---- No stop ----------------------------------------------- | |
| 317 | 1252 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
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1253 |
| 241 | 1254 //---- Finish computations once surface is reached ----------- |
| 1255 if( temp_deco <= pres_surface ) | |
| 1256 { | |
| 1257 Surface: | |
| 471 | 1258 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
|
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1259 copy_deco_table(); |
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1260 |
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1261 calc_ascenttime(); |
| 471 | 1262 char_O_deco_status = 0; // calc nullzeit next time. |
| 1263 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
| 241 | 1264 return; |
| 1265 } | |
| 1266 } | |
| 212 | 1267 } |
| 1268 else | |
|
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1269 { |
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1270 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1271 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
| 471 | 1272 if( !update_deco_table() ) // Just pass one minute. |
| 1273 goto Surface; // Deco table full: abort... | |
|
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1274 } |
| 197 | 1275 |
| 241 | 1276 //---- Then update tissue -------------------------------------------- |
| 203 | 1277 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1278 gas_switch_set(); // Apply any simulated gas change, once validated. |
| 212 | 1279 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
| 192 | 1280 sim_tissue(1); // Simulate compartiments for 1 minute. |
| 116 | 1281 } |
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1282 |
|
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1283 // Surface not reached, need more stops... for menu animation. |
| 278 | 1284 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
| 116 | 1285 } |
| 1286 | |
| 167 | 1287 ////////////////////////////////////////////////////////////////////////////// |
|
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1288 // Simulation ascention to first deco stop. |
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1289 // |
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1290 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1291 // there is no need to break on more that 16 iterations |
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1292 // (or we are already in deep shit). |
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1293 // |
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1294 // Input: pres_respiration |
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1295 // Output: temp_deco |
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1296 // |
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1297 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1298 // before ascent. |
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1299 void sim_ascent_to_first_stop(void) |
| 116 | 1300 { |
| 171 | 1301 update_startvalues(); |
|
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1302 clear_deco_table(); |
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1303 |
| 200 | 1304 temp_deco = pres_respiration; // Starts from current real depth. |
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1305 |
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1306 // Are we doing the special @+5min variation ? |
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1307 if(char_O_deco_status & 4) |
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1308 sim_extra_time(); |
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1309 |
| 212 | 1310 // Do we have a gas switch going on ? |
| 1311 if( sim_gas_delay > sim_dive_mins ) | |
| 1312 return; | |
| 1313 | |
| 241 | 1314 //---- Loop until first stop, gas switch, or surface is reached ---------- |
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1315 for(;;) |
| 116 | 1316 { |
| 461 | 1317 overlay float old_deco = temp_deco; // Pamb backup (bars) |
| 460 | 1318 |
| 241 | 1319 // Try ascending 1 full minute. |
| 461 | 1320 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. |
| 1321 if( temp_deco < pres_surface ) // But don't go over surface. | |
| 1322 temp_deco = pres_surface; | |
| 203 | 1323 |
| 461 | 1324 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because |
| 1325 // one minute passed. | |
| 212 | 1326 sim_limit(GF_low); |
| 1327 | |
| 1328 // Did we reach deepest remaining stop ? | |
| 241 | 1329 if( temp_deco < sim_lead_tissue_limit ) |
| 212 | 1330 { |
| 461 | 1331 temp_deco = old_deco; // Restore last correct depth, |
| 1332 break; // Do no spend a minute more. | |
| 212 | 1333 } |
| 1334 | |
| 203 | 1335 // Did we reach surface ? |
| 460 | 1336 // NOTE: we should round BEFORE checking surface is reached. |
| 461 | 1337 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
| 1338 if( temp_depth_limit == 0 ) | |
| 203 | 1339 { |
| 1340 temp_deco = pres_surface; // Yes: finished ! | |
| 1341 break; | |
| 1342 } | |
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1343 |
| 241 | 1344 // Check for gas change below new depth ? |
| 1345 if( gas_switch_deepest() ) | |
| 1346 { | |
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1347 assert( temp_depth_limit > 0); |
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1348 |
| 317 | 1349 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
| 212 | 1350 break; |
| 241 | 1351 } |
| 171 | 1352 |
| 203 | 1353 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1354 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
| 203 | 1355 sim_tissue(1); // and update tissues for 1 min. |
| 1356 } | |
| 167 | 1357 } |
| 116 | 1358 |
| 167 | 1359 ////////////////////////////////////////////////////////////////////////////// |
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1360 // Simulation extra time at the current depth. |
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1361 // |
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1362 // This routine is used for @+5min feature. |
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1363 void sim_extra_time(void) |
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1364 { |
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1365 overlay unsigned char extra = read_custom_function(58); |
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1366 do { |
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1367 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1368 sim_tissue(1); // and update tissues for 1 min. |
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1369 } while( --extra != 0 ); |
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1370 } |
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1371 |
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1372 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 1373 // calc_tissue |
| 1374 // | |
| 116 | 1375 // optimized in v.101 |
| 167 | 1376 // |
| 184 | 1377 static void calc_tissue(PARAMETER unsigned char period) |
| 116 | 1378 { |
| 251 | 1379 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1380 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1381 |
| 338 | 1382 for (ci=0;ci<NUM_COMP;ci++) |
| 126 | 1383 { |
| 258 | 1384 read_buhlmann_times(period); // 2 sec or 1 min period. |
| 116 | 1385 |
| 126 | 1386 // N2 |
| 339 | 1387 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1388 temp_tissue_safety(); |
| 339 | 1389 pres_tissue_N2[ci] += temp_tissue; |
| 165 | 1390 |
| 126 | 1391 // He |
| 339 | 1392 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
| 126 | 1393 temp_tissue_safety(); |
| 339 | 1394 pres_tissue_He[ci] += temp_tissue; |
| 192 | 1395 } |
| 167 | 1396 } |
| 116 | 1397 |
| 167 | 1398 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1399 // calc_limit |
| 167 | 1400 // |
| 192 | 1401 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
| 167 | 1402 // |
| 258 | 1403 static void calc_limit(void) |
| 167 | 1404 { |
| 192 | 1405 char_O_gtissue_no = 255; |
| 1406 calc_lead_tissue_limit = 0.0; | |
| 1407 | |
| 338 | 1408 for(ci=0; ci<NUM_COMP;ci++) |
| 192 | 1409 { |
| 339 | 1410 overlay float N2 = pres_tissue_N2[ci]; |
| 1411 overlay float He = pres_tissue_He[ci]; | |
|
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1412 overlay float p = N2 + He; |
| 192 | 1413 |
| 258 | 1414 read_buhlmann_coefficients(); |
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1415 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1416 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
| 116 | 1417 |
| 192 | 1418 // Apply the Eric Baker's varying gradient factor correction. |
| 1419 // Note: the correction factor depends both on GF and b, | |
| 1420 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1421 // so that can change who is the leading gas... | |
| 1422 // Note: Also depends of the GF. So the calcul is different for | |
| 1423 // GF_low, current GF, or GF_high... | |
| 1424 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1425 // hence what would happend at surface, | |
| 1426 // hence at GF_high. | |
| 509 | 1427 if( char_I_deco_model != 0 ) |
| 258 | 1428 p = ( p - var_N2_a * GF_high) * var_N2_b |
| 1429 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
| 192 | 1430 else |
| 1431 p = (p - var_N2_a) * var_N2_b; | |
| 258 | 1432 if( p < 0.0 ) p = 0.0; |
| 192 | 1433 |
| 1434 if( p > calc_lead_tissue_limit ) | |
| 1435 { | |
| 1436 char_O_gtissue_no = ci; | |
| 1437 calc_lead_tissue_limit = p; | |
| 1438 } | |
| 1439 } | |
| 197 | 1440 |
| 338 | 1441 assert( char_O_gtissue_no < NUM_COMP ); |
| 197 | 1442 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
| 167 | 1443 } |
| 1444 | |
| 1445 ////////////////////////////////////////////////////////////////////////////// | |
| 1446 // calc_nullzeit | |
| 1447 // | |
| 1448 // calculates the remaining bottom time | |
| 1449 // | |
|
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1450 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second |
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1451 // exponential term to the M-value equation, making it impossible to |
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1452 // invert... So we have to make a fast-simu until we find a better way. |
| 509 | 1453 // |
| 1454 // Input: pres_respiration | |
| 1455 // Output: char_O_nullzeit | |
| 167 | 1456 // |
| 1457 static void calc_nullzeit(void) | |
| 1458 { | |
|
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1459 //---- Compute ppN2 and ppHe --------------------------------------------- |
| 509 | 1460 temp_deco = pres_respiration; |
| 1461 sim_alveolar_presures(); | |
| 167 | 1462 |
| 509 | 1463 char_O_nullzeit = 240; |
| 1464 for(ci=0; ci<NUM_COMP; ci++) | |
| 1465 { | |
|
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1466 //---- Read A/B values and loading factor for N2 and He -------------- |
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1467 overlay float tN2 = pres_tissue_N2[ci]; |
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1468 overlay float tHe = pres_tissue_He[ci]; |
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1469 overlay float t = tN2 + tHe; |
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1470 overlay unsigned char ndl; |
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1471 overlay unsigned char period = 10; |
| 192 | 1472 |
| 509 | 1473 read_buhlmann_coefficients(); |
|
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1474 read_buhlmann_times(2); // Starts with a 10min period. |
| 509 | 1475 |
|
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1476 //---- Simulate for that tissue -------------------------------------- |
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1477 // NOTE: No need to simulate for longuer than the already found NDL. |
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1478 for(ndl=0; ndl<char_O_nullzeit;) |
| 509 | 1479 { |
|
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1480 //---- Compute updated mix M-value at surface |
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1481 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; |
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1482 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; |
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1483 overlay float M0 = (a + pres_surface/b); |
| 116 | 1484 |
|
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1485 //---- Add 10min/1min to N2/He tissues |
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1486 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; |
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1487 overlay float dTHe = (ppHe - tHe) * var_He_e; |
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1488 |
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1489 //---- Apply security margin when using the non-GF model |
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1490 if( char_I_deco_model == 0 ) |
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1491 { |
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1492 dTN2 *= float_saturation_multiplier; |
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1493 dTHe *= float_saturation_multiplier; |
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1494 } |
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1495 else // Or GF-based model |
| 509 | 1496 M0 = GF_high * (M0 - pres_surface) + pres_surface; |
| 167 | 1497 |
|
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1498 //---- Simulate off-gasing while going to surface |
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1499 // TODO ! |
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1500 // dTN2 -= exp( ... ascent time ... ppN2...) |
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1501 // dTHe -= exp( ... ascent time ... ppHe...) |
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1502 |
|
534
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1503 //---- Ok now, and still ok to surface after 1 or 10 minutes ? |
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1504 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) |
| 509 | 1505 { |
|
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1506 tN2 += dTN2; // YES: apply gas loadings, |
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1507 tHe += dTHe; |
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1508 t = tN2 + tHe; |
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1509 ndl += period; // increment NDL, |
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1510 continue; // and loop. |
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1511 } |
| 116 | 1512 |
|
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1513 //---- Should we retry with smaller steps ? |
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1514 if( period == 10 ) |
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1515 { |
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1516 read_buhlmann_times(1); // 1min coefs. |
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1517 period = 1; |
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1518 continue; |
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1519 } |
| 167 | 1520 |
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1521 //---- ELSE make a linear approx for the last minute |
| 524 | 1522 // Usefull to have a meaningfull rounding of NDL. |
| 1523 // But ONLY it positive (negativ casted to unsigned is bad). | |
| 1524 if( M0 > t ) | |
| 1525 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
|
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1526 break; |
| 509 | 1527 } |
|
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1528 |
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1529 // Keep the shortest NDL found |
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1530 if( ndl < char_O_nullzeit ) |
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1531 char_O_nullzeit = ndl; |
| 339 | 1532 } |
| 167 | 1533 } |
| 116 | 1534 |
| 167 | 1535 ////////////////////////////////////////////////////////////////////////////// |
| 1536 // calc_ascenttime | |
| 1537 // | |
|
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1538 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1539 // and all stops. |
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1540 // |
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1541 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
|
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1542 static void calc_ascenttime(void) |
| 116 | 1543 { |
| 323 | 1544 overlay unsigned char x; |
| 1545 overlay unsigned short sum; | |
| 168 | 1546 |
| 323 | 1547 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
| 1548 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
| 1549 if (ascent < 0.0) | |
| 1550 ascent = 0.0; | |
| 1551 sum = (unsigned short)(ascent + 0.99); | |
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1552 |
| 338 | 1553 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
| 323 | 1554 sum += (unsigned short)internal_deco_time[x]; |
| 1555 | |
| 1556 if( char_O_deco_status == 1 ) | |
| 1557 int_O_ascenttime = sum; | |
| 126 | 1558 else |
| 323 | 1559 int_O_extra_ascenttime = sum; |
| 167 | 1560 } |
| 116 | 1561 |
| 167 | 1562 ////////////////////////////////////////////////////////////////////////////// |
| 1563 // update_startvalues | |
| 1564 // | |
| 116 | 1565 // updated in v.102 |
| 167 | 1566 // |
| 116 | 1567 void update_startvalues(void) |
| 1568 { | |
| 167 | 1569 overlay unsigned char x; |
| 116 | 1570 |
| 201 | 1571 // Start ascent simulation with current tissue partial pressures. |
| 339 | 1572 for(x=0; x<NUM_COMP; x++) |
| 116 | 1573 { |
| 339 | 1574 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
| 1575 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
| 116 | 1576 } |
| 197 | 1577 |
| 201 | 1578 // No leading tissue (yet) for this ascent simulation. |
| 197 | 1579 sim_lead_tissue_limit = 0.0; |
| 1580 sim_lead_tissue_no = 255; | |
| 167 | 1581 } |
| 116 | 1582 |
| 167 | 1583 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1584 // sim_tissue |
| 167 | 1585 // |
| 116 | 1586 // optimized in v.101 |
| 167 | 1587 // |
| 1588 // Function very simular to calc_tissue, but: | |
| 1589 // + Use a 1min or 10min period. | |
| 1590 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 184 | 1591 static void sim_tissue(PARAMETER unsigned char period) |
| 116 | 1592 { |
| 251 | 1593 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1594 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1595 |
| 338 | 1596 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1597 { |
| 258 | 1598 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
| 165 | 1599 |
| 126 | 1600 // N2 |
| 339 | 1601 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1602 temp_tissue_safety(); |
| 339 | 1603 sim_pres_tissue_N2[ci] += temp_tissue; |
| 126 | 1604 |
| 1605 // He | |
| 339 | 1606 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
| 126 | 1607 temp_tissue_safety(); |
| 339 | 1608 sim_pres_tissue_He[ci] += temp_tissue; |
| 192 | 1609 } |
| 167 | 1610 } |
| 116 | 1611 |
| 167 | 1612 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1613 // sim_limit() |
| 1614 // | |
| 1615 // New in v.111 | |
| 1616 // | |
| 1617 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1618 // different depth, because it depends on current gradient factor. | |
| 167 | 1619 // |
| 192 | 1620 static void sim_limit(PARAMETER float GF_current) |
| 116 | 1621 { |
| 212 | 1622 assert( 0.0 < GF_current && GF_current <= 1.0f); |
| 1623 | |
| 192 | 1624 sim_lead_tissue_limit = 0.0; |
| 212 | 1625 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
| 192 | 1626 |
| 338 | 1627 for(ci=0; ci<NUM_COMP; ci++) |
| 192 | 1628 { |
| 339 | 1629 overlay float N2 = sim_pres_tissue_N2[ci]; |
| 1630 overlay float He = sim_pres_tissue_He[ci]; | |
| 241 | 1631 overlay float p = N2 + He; |
| 192 | 1632 |
| 258 | 1633 read_buhlmann_coefficients(); |
| 241 | 1634 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
| 1635 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 192 | 1636 |
| 1637 // Apply the Eric Baker's varying gradient factor correction. | |
| 1638 // Note: the correction factor depends both on GF and b, | |
| 1639 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1640 // so that can change who is the leading gas... | |
| 1641 // Note: Also depends of the GF_current... | |
| 509 | 1642 if( char_I_deco_model != 0 ) |
| 302 | 1643 p = ( p - var_N2_a * GF_current) |
| 1644 / (GF_current / var_N2_b + 1.0 - GF_current); | |
| 192 | 1645 else |
| 1646 p = (p - var_N2_a) * var_N2_b; | |
| 237 | 1647 if( p < 0.0 ) p = 0.0; |
| 192 | 1648 |
| 1649 if( p > sim_lead_tissue_limit ) | |
| 1650 { | |
| 1651 sim_lead_tissue_no = ci; | |
| 1652 sim_lead_tissue_limit = p; | |
| 1653 } | |
| 1654 } // for ci | |
| 197 | 1655 |
| 338 | 1656 assert( sim_lead_tissue_no < NUM_COMP ); |
| 237 | 1657 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
| 167 | 1658 } |
| 116 | 1659 |
| 167 | 1660 ////////////////////////////////////////////////////////////////////////////// |
|
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1661 // clear_deco_table |
| 167 | 1662 // |
| 1663 // unchanged in v.101 | |
| 1664 // | |
|
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1665 static void clear_deco_table(void) |
| 116 | 1666 { |
|
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1667 overlay unsigned char x; |
|
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1668 |
| 338 | 1669 for(x=0; x<NUM_STOPS; ++x) |
|
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1670 { |
|
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1671 internal_deco_time [x] = 0; |
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1672 internal_deco_depth[x] = 0; |
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1673 } |
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1674 } |
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1675 |
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1676 ////////////////////////////////////////////////////////////////////////////// |
|
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1677 // update_deco_table |
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1678 // |
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1679 // Add 1 min to current stop. |
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1680 // |
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1681 // Inputs: |
|
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1682 // temp_depth_limit = stop's depth, in meters. |
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1683 // In/Out: |
|
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1684 // internal_deco_depth[] : depth (in metres) of each stops. |
|
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1685 // internal_deco_time [] : time (in minutes) of each stops. |
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1686 // |
| 471 | 1687 static unsigned char update_deco_table() |
|
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1688 { |
| 192 | 1689 overlay unsigned char x; |
|
247
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1690 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
|
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1691 assert( temp_depth_limit > 0 ); // No stop at surface... |
|
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1692 |
| 338 | 1693 for(x=0; x<NUM_STOPS; ++x) |
| 192 | 1694 { |
| 212 | 1695 // Make sure deco-stops are recorded in order: |
|
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1696 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
| 212 | 1697 |
|
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1698 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
| 192 | 1699 { |
| 1700 // Do not overflow (max 255') | |
| 1701 if( internal_deco_time[x] < 255 ) | |
| 1702 { | |
| 1703 internal_deco_time[x]++; | |
| 471 | 1704 return 1; |
| 192 | 1705 } |
| 1706 // But store extra in the next stop... | |
|
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1707 } |
| 192 | 1708 |
|
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1709 if( internal_deco_depth[x] == 0 ) |
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1710 { |
| 192 | 1711 internal_deco_depth[x] = temp_depth_limit; |
|
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1712 if( sim_gas_delay >= sim_dive_mins ) |
|
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1713 internal_deco_depth[x] |= 0x80; |
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1714 |
|
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1715 internal_deco_time[x] = 1; |
| 471 | 1716 return 1; |
|
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1717 } |
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1718 } |
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1719 |
| 192 | 1720 // Can't store stops at more than 96m. |
| 1721 // Or stops at less that 3m too. | |
|
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1722 // Just do nothing with that... |
| 471 | 1723 return 0; |
| 167 | 1724 } |
| 116 | 1725 |
| 167 | 1726 ////////////////////////////////////////////////////////////////////////////// |
| 1727 // calc_gradient_factor | |
| 1728 // | |
| 165 | 1729 // optimized in v.101 (var_N2_a) |
| 116 | 1730 // new code in v.102 |
| 167 | 1731 // |
| 1732 static void calc_gradient_factor(void) | |
| 116 | 1733 { |
| 197 | 1734 overlay float gf; |
| 339 | 1735 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
| 1736 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
| 237 | 1737 |
| 338 | 1738 assert( char_O_gtissue_no < NUM_COMP ); |
| 237 | 1739 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1740 |
|
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1741 // tissue > respiration (currently off-gasing) |
| 302 | 1742 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
| 1743 // GF = 100% when respiration == limit. | |
|
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1744 temp_tissue = N2 + He; |
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1745 if( temp_tissue <= pres_respiration ) |
| 197 | 1746 gf = 0.0; |
| 1747 else | |
| 1748 { | |
|
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1749 overlay float limit = calc_lead_tissue_limit; |
|
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1750 // NOTE: in GF model, calc_lead_tissue_limit include already the |
|
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1751 // correction due to gradient factor. To compute the actual |
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1752 // current GF, we need to (re-)compute the raw ambiant-pressure |
|
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1753 // limit from the Bühlmann model. |
| 509 | 1754 if( char_I_deco_model != 0 ) |
|
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1755 { |
|
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1756 ci = char_O_gtissue_no; |
|
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1757 read_buhlmann_coefficients(); |
|
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1758 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1759 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1760 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1761 } |
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1762 |
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1763 gf = (temp_tissue - pres_respiration) |
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1764 / (temp_tissue - limit) |
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1765 * 100.0; |
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1766 if( gf > 254.5 ) gf = 255.0; |
| 197 | 1767 if( gf < 0.0 ) gf = 0.0; |
| 1768 } | |
|
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1769 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
| 116 | 1770 |
| 509 | 1771 if( char_I_deco_model != 0 ) // calculate relative gradient factor |
| 116 | 1772 { |
| 197 | 1773 overlay float rgf; |
| 1774 | |
| 562 | 1775 if( low_depth < 3 ) |
| 197 | 1776 rgf = GF_high; |
| 1777 else | |
| 1778 { | |
| 317 | 1779 overlay float temp1 = low_depth * METER_TO_BAR; |
| 197 | 1780 overlay float temp2 = pres_respiration - pres_surface; |
| 186 | 1781 |
| 197 | 1782 if (temp2 <= 0) |
| 1783 rgf = GF_high; | |
| 1784 else if (temp2 >= temp1) | |
| 1785 rgf = GF_low; | |
| 1786 else | |
| 1787 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 1788 } | |
| 186 | 1789 |
| 197 | 1790 rgf = gf / rgf; // gf is already in percent |
| 1791 if( rgf < 0.0 ) rgf = 0.0; | |
|
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1792 if( rgf > 254.5 ) rgf = 255.0; |
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1793 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
| 116 | 1794 } // calc relative gradient factor |
| 1795 else | |
| 1796 { | |
| 186 | 1797 char_O_relative_gradient_GF = char_O_gradient_factor; |
| 116 | 1798 } |
| 167 | 1799 } |
| 116 | 1800 |
| 167 | 1801 ////////////////////////////////////////////////////////////////////////////// |
| 1802 // deco_calc_desaturation_time | |
| 1803 // | |
| 116 | 1804 // FIXED N2_ratio |
| 1805 // unchanged in v.101 | |
|
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1806 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
| 233 | 1807 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
| 167 | 1808 // |
| 116 | 1809 void deco_calc_desaturation_time(void) |
| 1810 { | |
|
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1811 RESET_C_STACK |
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1812 |
| 233 | 1813 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 1814 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1815 | |
| 237 | 1816 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
| 233 | 1817 pres_surface = int_I_pres_surface * 0.001; |
|
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1818 ppN2 = N2_ratio * (pres_surface - ppWater); |
| 126 | 1819 int_O_desaturation_time = 0; |
|
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1820 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 233 | 1821 |
| 339 | 1822 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1823 { |
| 251 | 1824 overlay unsigned short desat_time; // For a particular compartiment, in min. |
| 1825 overlay float temp1; | |
| 1826 overlay float temp2; | |
| 1827 overlay float temp3; | |
| 1828 overlay float temp4; | |
| 338 | 1829 |
| 509 | 1830 read_buhlmann_ht(); |
| 338 | 1831 |
| 126 | 1832 // saturation_time (for flight) and N2_saturation in multiples of halftime |
| 1833 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1834 // 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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1835 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
| 126 | 1836 // N2 |
| 339 | 1837 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
| 1838 temp2 = ppN2 - pres_tissue_N2[ci]; | |
| 126 | 1839 if (temp2 >= 0.0) |
| 1840 { | |
| 233 | 1841 temp1 = 0.0; |
| 1842 temp2 = 0.0; | |
| 126 | 1843 } |
| 1844 else | |
| 1845 temp1 = temp1 / temp2; | |
| 251 | 1846 if( 0.0 < temp1 && temp1 < 1.0 ) |
| 126 | 1847 { |
|
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1848 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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1849 // minus because log is negative. |
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1850 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
| 509 | 1851 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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1852 |
| 126 | 1853 } |
| 1854 else | |
| 1855 { | |
| 233 | 1856 temp1 = 0.0; |
| 1857 temp2 = 0.0; | |
| 126 | 1858 } |
| 116 | 1859 |
| 126 | 1860 // He |
| 339 | 1861 temp3 = 0.1 - pres_tissue_He[ci]; |
| 126 | 1862 if (temp3 >= 0.0) |
| 1863 { | |
| 233 | 1864 temp3 = 0.0; |
| 1865 temp4 = 0.0; | |
| 126 | 1866 } |
| 1867 else | |
| 339 | 1868 temp3 = - temp3 / pres_tissue_He[ci]; |
| 251 | 1869 if( 0.0 < temp3 && temp3 < 1.0 ) |
| 126 | 1870 { |
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1871 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
| 126 | 1872 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
| 1873 // minus because log is negative | |
| 509 | 1874 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
| 126 | 1875 } |
| 1876 else | |
| 1877 { | |
| 233 | 1878 temp3 = 0.0; |
| 1879 temp4 = 0.0; | |
| 126 | 1880 } |
| 116 | 1881 |
| 126 | 1882 // saturation_time (for flight) |
| 1883 if (temp4 > temp2) | |
| 203 | 1884 desat_time = (unsigned short)temp4; |
| 126 | 1885 else |
| 203 | 1886 desat_time = (unsigned short)temp2; |
| 252 | 1887 |
| 251 | 1888 if(desat_time > int_O_desaturation_time) |
| 1889 int_O_desaturation_time = desat_time; | |
| 116 | 1890 |
| 126 | 1891 // N2 saturation in multiples of halftime for display purposes |
| 339 | 1892 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 1893 temp2 = temp2 + 80.0; // set center | |
| 126 | 1894 if (temp2 < 0.0) |
| 1895 temp2 = 0.0; | |
| 1896 if (temp2 > 255.0) | |
| 1897 temp2 = 255.0; | |
| 339 | 1898 char_O_tissue_N2_saturation[ci] = (char)temp2; |
| 233 | 1899 |
| 126 | 1900 // He saturation in multiples of halftime for display purposes |
| 339 | 1901 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 1902 temp4 = temp4 + 80.0; // set center | |
| 126 | 1903 if (temp4 < 0.0) |
| 1904 temp4 = 0.0; | |
| 1905 if (temp4 > 255.0) | |
| 1906 temp4 = 255.0; | |
| 339 | 1907 char_O_tissue_He_saturation[ci] = (char)temp4; |
| 126 | 1908 } // for |
| 167 | 1909 } |
| 116 | 1910 |
| 167 | 1911 ////////////////////////////////////////////////////////////////////////////// |
| 1912 // calc_wo_deco_step_1_min | |
| 1913 // | |
| 116 | 1914 // FIXED N2 Ratio |
| 1915 // optimized in v.101 (...saturation_multiplier) | |
| 1916 // desaturation slowed down to 70,42% | |
| 167 | 1917 // |
| 1918 static void calc_wo_deco_step_1_min(void) | |
| 116 | 1919 { |
| 251 | 1920 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 1921 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
| 1922 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
| 1923 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1924 | |
| 126 | 1925 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
| 368 | 1926 pres_respiration = pres_surface = int_I_pres_surface * 0.001; |
| 1927 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 200 | 1928 ppHe = 0.0; |
|
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1929 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 197 | 1930 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 126 | 1931 |
| 339 | 1932 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
| 167 | 1933 |
|
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1934 clear_deco_table(); |
| 200 | 1935 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
| 126 | 1936 char_O_nullzeit = 0; |
| 168 | 1937 int_O_ascenttime = 0; |
| 323 | 1938 int_O_extra_ascenttime = 0; |
| 126 | 1939 calc_gradient_factor(); |
| 167 | 1940 } |
| 126 | 1941 |
| 167 | 1942 ////////////////////////////////////////////////////////////////////////////// |
| 368 | 1943 // calc_dive_interval |
| 1944 // | |
| 1945 // Prepare tissue for delay before the next dive simulation. | |
| 1946 // | |
| 1947 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
| 1948 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
| 1949 // | |
| 1950 // Should be protected by deco_push_tissues_to_vault(), | |
| 1951 // deco_pull_tissues_from_vault() | |
| 1952 // | |
| 1953 // desaturation slowed down to 70,42%. | |
| 1954 // | |
|
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1955 static void calc_dive_interval(void) |
| 368 | 1956 { |
| 1957 overlay unsigned char t; | |
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1958 overlay unsigned char backup_model; |
| 368 | 1959 |
| 1960 //---- Initialize simulation parameters ---------------------------------- | |
| 1961 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
| 1962 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
| 1963 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 1964 ppHe = 0.0; | |
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1965 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
| 368 | 1966 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 1967 | |
|
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1968 // Make sure SURFACE_DESAT_FACTOR is applyed: |
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1969 backup_model = char_I_deco_model; |
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1970 char_I_deco_model = 0; |
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1971 |
| 368 | 1972 //---- Perform simulation ------------------------------------------------ |
| 1973 for(t=0; t<char_I_dive_interval; ++t) | |
| 1974 { | |
| 1975 calc_tissue(2); // period = 10min. | |
| 1976 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
| 1977 } | |
| 514 | 1978 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
| 1979 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); | |
|
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1980 |
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1981 //---- Restore model ----------------------------------------------------- |
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1982 char_I_deco_model = backup_model; |
| 368 | 1983 } |
| 1984 | |
| 1985 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 1986 ////////////////////////////////////////////////////////////////////////////// |
| 1987 ////////////////////////////////// deco_hash ///////////////////////////////// | |
| 1988 ////////////////////////////////////////////////////////////////////////////// | |
| 1989 ////////////////////////////////////////////////////////////////////////////// | |
| 126 | 1990 |
| 184 | 1991 #ifndef CROSS_COMPILE |
| 116 | 1992 void deco_hash(void) |
| 1993 { | |
| 167 | 1994 overlay unsigned char md_i, md_j; // Loop index. |
| 1995 overlay unsigned char md_t; | |
| 1996 overlay unsigned char md_buffer[16]; | |
| 1997 overlay unsigned char md_temp; | |
| 203 | 1998 overlay unsigned short md_pointer; |
| 167 | 1999 |
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2000 RESET_C_STACK |
| 126 | 2001 |
| 2002 // init | |
| 164 | 2003 for(md_i=0;md_i<16;md_i++) |
| 126 | 2004 { |
| 2005 md_state[md_i] = 0; | |
| 164 | 2006 char_O_hash[md_i] = 0; |
| 126 | 2007 } // for md_i 16 |
| 116 | 2008 |
| 126 | 2009 _asm |
| 167 | 2010 movlw 0x01 // md_pi address. |
| 2011 movwf TBLPTRU,0 | |
| 2012 movlw 0x7E | |
| 2013 movwf TBLPTRH,0 | |
| 2014 movlw 0x00 | |
| 2015 movwf TBLPTRL,0 | |
| 126 | 2016 _endasm; |
| 165 | 2017 md_i = 0; |
| 2018 do { | |
| 126 | 2019 _asm |
| 2020 TBLRDPOSTINC | |
| 2021 movff TABLAT,md_temp | |
| 2022 _endasm | |
| 165 | 2023 md_pi_subst[md_i++] = md_temp; |
| 2024 } while( md_i != 0 ); | |
| 2025 | |
| 126 | 2026 _asm |
| 167 | 2027 movlw 0x00 |
| 2028 movwf TBLPTRU,0 | |
| 2029 movlw 0x00 | |
| 2030 movwf TBLPTRH,0 | |
| 2031 movlw 0x00 | |
| 2032 movwf TBLPTRL,0 | |
| 126 | 2033 _endasm |
| 167 | 2034 |
| 126 | 2035 // cycle buffers |
| 2036 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
| 2037 { | |
| 2038 md_t = 0; | |
| 2039 for (md_i=0;md_i<16;md_i++) | |
| 2040 { | |
| 2041 if(md_pointer == 9) | |
| 164 | 2042 md_temp = char_O_hash[md_i]; |
| 126 | 2043 else |
| 2044 { | |
| 2045 _asm | |
| 167 | 2046 TBLRDPOSTINC |
| 2047 movff TABLAT,md_temp | |
| 126 | 2048 _endasm |
| 2049 } // else | |
| 167 | 2050 |
| 2051 md_buffer[md_i] = md_temp; | |
| 186 | 2052 md_state[md_i+16] = md_temp; |
| 2053 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
| 126 | 2054 } // for md_i 16 |
| 2055 | |
| 2056 for (md_i=0;md_i<18;md_i++) | |
| 2057 { | |
| 2058 for (md_j=0;md_j<48;md_j++) | |
| 2059 { | |
| 167 | 2060 md_state[md_j] ^= md_pi_subst[md_t]; |
| 126 | 2061 md_t = md_state[md_j]; |
| 2062 } // for md_j 48 | |
| 2063 md_t = (unsigned char)(md_t+1); | |
| 2064 } // for md_i 18 | |
| 164 | 2065 md_t = char_O_hash[15]; |
| 126 | 2066 |
| 2067 for (md_i=0;md_i<16;md_i++) | |
| 2068 { | |
| 167 | 2069 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
| 164 | 2070 md_t = char_O_hash[md_i]; |
| 126 | 2071 } // for md_i 16 |
| 2072 } // for md_pointer | |
| 116 | 2073 } // void deco_hash(void) |
| 184 | 2074 #endif |
| 116 | 2075 |
| 167 | 2076 ////////////////////////////////////////////////////////////////////////////// |
| 2077 // deco_clear_CNS_fraction | |
| 2078 // | |
| 116 | 2079 // new in v.101 |
| 167 | 2080 // |
| 116 | 2081 void deco_clear_CNS_fraction(void) |
| 2082 { | |
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2083 RESET_C_STACK |
| 237 | 2084 |
| 126 | 2085 CNS_fraction = 0.0; |
| 2086 char_O_CNS_fraction = 0; | |
| 167 | 2087 } |
| 116 | 2088 |
| 167 | 2089 ////////////////////////////////////////////////////////////////////////////// |
| 2090 // deco_calc_CNS_fraction | |
| 2091 // | |
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2092 // Input: char_I_actual_ppO2 : Current condition (in decibars). |
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2093 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. |
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2094 // CNS_fraction : velue before period. |
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2095 // Output: CNS_fraction, char_O_CNS_fraction |
| 167 | 2096 // |
| 116 | 2097 void deco_calc_CNS_fraction(void) |
| 2098 { | |
| 292 | 2099 overlay float time_factor = 1.0f; |
| 126 | 2100 RESET_C_STACK |
| 167 | 2101 |
| 471 | 2102 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
| 237 | 2103 assert( char_I_actual_ppO2 > 15 ); |
| 2104 | |
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2105 if( char_I_step_is_1min == 1 ) |
| 292 | 2106 time_factor = 30.0f; |
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2107 else if( char_I_step_is_1min == 2 ) |
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2108 time_factor = 300.0f; |
| 116 | 2109 |
| 126 | 2110 if (char_I_actual_ppO2 < 50) |
| 292 | 2111 ; // no changes |
| 126 | 2112 else if (char_I_actual_ppO2 < 60) |
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2113 CNS_fraction += time_factor/(-540.0 * char_I_actual_ppO2 + 54000.0); |
| 126 | 2114 else if (char_I_actual_ppO2 < 70) |
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2115 CNS_fraction += time_factor/(-450.0 * char_I_actual_ppO2 + 48600.0); |
| 126 | 2116 else if (char_I_actual_ppO2 < 80) |
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2117 CNS_fraction += time_factor/(-360.0 * char_I_actual_ppO2 + 42300.0); |
| 126 | 2118 else if (char_I_actual_ppO2 < 90) |
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2119 CNS_fraction += time_factor/(-270.0 * char_I_actual_ppO2 + 35100.0); |
| 126 | 2120 else if (char_I_actual_ppO2 < 110) |
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2121 CNS_fraction += time_factor/(-180.0 * char_I_actual_ppO2 + 27000.0); |
| 126 | 2122 else if (char_I_actual_ppO2 < 150) |
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2123 CNS_fraction += time_factor/( -90.0 * char_I_actual_ppO2 + 17100.0); |
| 126 | 2124 else if (char_I_actual_ppO2 < 160) |
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2125 CNS_fraction += time_factor/(-225.0 * char_I_actual_ppO2 + 37350.0); |
| 126 | 2126 else if (char_I_actual_ppO2 < 165) |
| 292 | 2127 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 | 2128 else if (char_I_actual_ppO2 < 170) |
| 292 | 2129 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
| 126 | 2130 else if (char_I_actual_ppO2 < 175) |
| 292 | 2131 CNS_fraction += time_factor*0.00136; |
| 126 | 2132 else if (char_I_actual_ppO2 < 180) |
| 292 | 2133 CNS_fraction += time_factor*0.00180; |
| 126 | 2134 else if (char_I_actual_ppO2 < 185) |
| 292 | 2135 CNS_fraction += time_factor*0.00237; |
| 126 | 2136 else if (char_I_actual_ppO2 < 190) |
| 292 | 2137 CNS_fraction += time_factor*0.00310; |
| 126 | 2138 else if (char_I_actual_ppO2 < 195) |
| 292 | 2139 CNS_fraction += time_factor*0.00401; |
| 126 | 2140 else if (char_I_actual_ppO2 < 200) |
| 292 | 2141 CNS_fraction += time_factor*0.00517; |
| 126 | 2142 else if (char_I_actual_ppO2 < 230) |
| 292 | 2143 CNS_fraction += time_factor*0.0209; |
| 126 | 2144 else |
| 292 | 2145 CNS_fraction += time_factor*0.0482; // value for 2.5 |
| 116 | 2146 |
| 514 | 2147 if( CNS_fraction > 2.5 ) |
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2148 CNS_fraction = 2.55; |
| 514 | 2149 if( CNS_fraction < 0.0 ) |
| 126 | 2150 CNS_fraction = 0.0; |
| 2151 | |
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2152 char_O_CNS_fraction = (unsigned char)(100.0 * CNS_fraction + 0.5); |
| 167 | 2153 } |
| 116 | 2154 |
| 167 | 2155 ////////////////////////////////////////////////////////////////////////////// |
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2156 // deco_calc_CNS_planning |
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2157 // |
|
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2158 // Compute CNS during predicted ascent. |
| 488 | 2159 // |
| 2160 // Note: Needs a call to deco_push_tissues_to_vault(), | |
| 2161 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
| 2162 // | |
| 2163 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
| 2164 // Output: CNS_fraction, char_O_CNS_fraction | |
| 2165 // | |
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2166 void deco_calc_CNS_planning(void) |
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2167 { |
|
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2168 overlay unsigned char backup_gas_last_depth; |
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2169 overlay unsigned char backup_gas_last_used; |
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2170 overlay unsigned short backup_gas_delay; |
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2171 overlay unsigned short backup_dive_mins; |
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2172 overlay unsigned char backup_actual_ppO2; |
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2173 |
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2174 RESET_C_STACK |
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2175 |
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2176 // Backup state machine |
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2177 backup_gas_last_depth = sim_gas_last_depth; |
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2178 backup_gas_last_used = sim_gas_last_used; |
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2179 backup_gas_delay = sim_gas_delay; |
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2180 backup_dive_mins = sim_dive_mins; |
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2181 backup_actual_ppO2 = char_I_actual_ppO2; |
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2182 |
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2183 // Uses 1min CNS period: |
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2184 char_I_step_is_1min = 1; |
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2185 |
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2186 //---- Retrieve bottom Gas used, and set variables. |
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2187 sim_gas_last_used = char_I_first_gas; |
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2188 sim_gas_last_depth = 0; // Surface gas marker. |
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2189 gas_switch_set(); // Sets initial calc_N2/He_ratio |
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2190 |
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2191 //---- CCR mode : do the full TTS at once -------------------------------- |
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2192 if( char_I_const_ppO2 != 0 ) |
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2193 { |
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2194 overlay unsigned short t; // Needs 16bits here ! |
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2195 char_I_actual_ppO2 = char_I_const_ppO2; |
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2196 for(t=0; t<int_O_ascenttime; ++t) |
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2197 deco_calc_CNS_fraction(); |
|
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2198 } |
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2199 else //---- OC mode : have to follow all gas switches... ----------------- |
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2200 { |
|
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|
2201 overlay unsigned char i = 0; // Decostop loop counter |
|
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2202 overlay float actual_ppO2; |
|
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2203 overlay unsigned char time, t; |
|
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2204 |
|
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2205 //---- Ascent to surface delay |
|
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2206 // NOTE: count as if time is spent with bottom pressure, |
|
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2207 // AND the bottom gas |
|
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2208 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) |
|
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2209 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2210 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
|
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2211 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
|
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2212 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
|
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2213 |
|
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2214 // Ascent time (rounded up): |
|
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2215 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); |
|
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2216 |
|
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2217 for(t=0; t<time; ++t) |
|
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2218 { |
|
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|
2219 deco_calc_CNS_fraction(); |
|
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|
2220 sim_dive_mins++; |
|
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2221 } |
|
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2222 |
|
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|
2223 //---- Do all further stops |
|
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2224 for(i=0; i<NUM_STOPS; ++i) |
|
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2225 { |
|
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2226 //---- Get next stop |
|
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|
2227 time = char_O_deco_time[i]; |
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2228 temp_depth_limit = char_O_deco_depth[i] & 0x7F; |
|
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|
2229 if( time == 0 ) break; // End of table: done. |
|
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2230 |
|
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|
2231 //---- Gas Switch ? |
|
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|
2232 if( char_O_deco_depth[i] & 0x80 ) |
|
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2233 if( gas_switch_deepest() ) |
|
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|
2234 gas_switch_set(); |
|
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|
2235 |
|
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|
2236 //---- Convert Depth and N2_ratio to ppO2 |
|
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|
2237 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) |
|
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2238 * (1.0 - calc_N2_ratio - calc_He_ratio); |
|
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|
2239 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
|
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|
2240 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
|
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|
2241 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
|
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2242 |
|
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|
2243 //---- Apply the stop |
|
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2244 for(t=0; t<time; ++t) |
|
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2245 { |
|
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|
2246 deco_calc_CNS_fraction(); |
|
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|
2247 sim_dive_mins++; |
|
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2248 } |
|
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2249 } |
| 488 | 2250 } |
| 2251 | |
| 2252 // Back to normal mode... | |
| 2253 char_I_step_is_1min = 0; | |
|
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|
2254 sim_gas_last_depth = backup_gas_last_depth; |
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|
2255 sim_gas_last_used = backup_gas_last_used; |
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|
2256 sim_gas_delay = backup_gas_delay; |
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|
2257 sim_dive_mins = backup_dive_mins; |
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|
2258 char_I_actual_ppO2 = backup_actual_ppO2; |
|
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2259 } |
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2260 |
|
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|
2261 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 2262 // deco_calc_CNS_decrease_15min |
| 2263 // | |
| 116 | 2264 // new in v.101 |
| 167 | 2265 // |
| 116 | 2266 // calculates the half time of 90 minutes in 6 steps of 15 min |
| 200 | 2267 // (Used in sleepmode, for low battery mode). |
| 167 | 2268 // |
| 116 | 2269 // Output: char_O_CNS_fraction |
| 2270 // Uses and Updates: CNS_fraction | |
| 167 | 2271 // |
| 116 | 2272 void deco_calc_CNS_decrease_15min(void) |
| 2273 { | |
| 237 | 2274 RESET_C_STACK |
| 514 | 2275 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
| 237 | 2276 |
| 126 | 2277 CNS_fraction = 0.890899 * CNS_fraction; |
| 514 | 2278 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
| 167 | 2279 } |
| 116 | 2280 |
| 167 | 2281 ////////////////////////////////////////////////////////////////////////////// |
| 2282 // deco_calc_percentage | |
| 2283 // | |
| 116 | 2284 // new in v.101 |
| 167 | 2285 // |
| 116 | 2286 // calculates int_I_temp * char_I_temp / 100 |
| 2287 // output is int_I_temp | |
| 200 | 2288 // |
| 2289 // Used to compute NoFly remaining time. | |
|
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2290 // |
| 116 | 2291 void deco_calc_percentage(void) |
| 2292 { | |
|
122
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|
2293 RESET_C_STACK |
|
222
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2294 |
| 237 | 2295 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
|
554
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2296 assert( 0 <= int_I_temp && int_I_temp < 5760 ); // Less than 4 days = 96h... |
| 237 | 2297 |
|
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2298 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
| 237 | 2299 |
|
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|
2300 assert( int_I_temp < 5760 ); // Less than 96h too... |
|
222
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|
2301 } |
|
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2302 |
|
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|
2303 |
|
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2304 ////////////////////////////////////////////////////////////////////////////// |
|
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|
2305 // deco_gas_volumes |
|
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2306 // |
|
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2307 // new in v.111 |
|
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2308 // |
|
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2309 // calculates volumes for each gas. |
|
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2310 // |
|
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2311 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
|
240
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2312 // Gas list. |
|
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|
2313 // char_I_first_gas is the bottom gas. |
|
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2314 // decoplan (char_O_deco_depth, char_O_deco_time). |
|
234
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2315 // CF#54 == TRUE if shallowest stop first. |
|
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2316 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min. |
|
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2317 // CF#57 == deco liters/minutes (5 .. 50) or bar/min. |
| 224 | 2318 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
|
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2319 // |
|
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2320 void deco_gas_volumes(void) |
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2321 { |
| 338 | 2322 overlay float volumes[NUM_GAS]; |
|
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2323 overlay float bottom_usage, deco_usage; |
|
234
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2324 overlay unsigned char i, deepest_first; |
| 241 | 2325 overlay unsigned char gas; |
|
222
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2326 RESET_C_STACK |
|
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2327 |
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2328 //---- initialize with bottom consumption -------------------------------- |
| 338 | 2329 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
|
240
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2330 volumes[i] = 0.0; |
|
222
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2331 |
| 338 | 2332 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
| 241 | 2333 gas = char_I_first_gas - 1; |
| 2334 | |
|
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2335 bottom_usage = (float) read_custom_function(56); |
| 265 | 2336 if( bottom_usage > 0.0 ) |
| 2337 volumes[gas] | |
| 2338 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
| 2339 * char_I_bottom_time // in minutes. | |
| 2340 * bottom_usage; // In liter/minutes. | |
| 2341 else | |
| 2342 volumes[gas] = 65535.0; | |
|
222
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2343 |
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2344 //---- Ascent usage ------------------------------------------------------ |
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2345 |
|
234
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2346 deepest_first = read_custom_function(54) == 0; |
|
511
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|
2347 deco_usage = (float) read_custom_function(57); // In liter/minutes. |
|
222
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2348 |
| 224 | 2349 // Usage up to the first stop: |
| 2350 // - computed at MAX depth (easier, safer), | |
|
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2351 // - with an ascent speed of 10m/min. |
| 224 | 2352 // - with ascent litter / minutes. |
|
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2353 // - still using bottom gas: |
|
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2354 if( deco_usage > 0.0 ) |
| 265 | 2355 volumes[gas] |
| 2356 += (char_I_bottom_depth*0.1 + 1.0) // Depth -> bar | |
| 2357 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 // ascent time (min) | |
|
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2358 * deco_usage; // Consumption ( xxx / min @ 1 bar) |
| 265 | 2359 else |
| 2360 volumes[gas] = 65535.0; | |
|
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2361 |
| 338 | 2362 for(i=0; i<NUM_STOPS; ++i) |
|
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2363 { |
| 241 | 2364 overlay unsigned char j; |
|
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2365 overlay unsigned char depth, time, ascent; |
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2366 |
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2367 // Manage stops in reverse order (CF#54) |
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2368 if( deepest_first ) |
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2369 { |
| 241 | 2370 time = char_O_deco_time[i]; |
|
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2371 if( time == 0 ) break; // End of table: done. |
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2372 |
|
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2373 ascent = depth = char_O_deco_depth[i] & 0x7F; |
|
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2374 if( i < 31 ) |
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2375 ascent -= char_O_deco_depth[i+1] & 0x7F; |
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2376 } |
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2377 else |
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2378 { |
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2379 time = char_O_deco_time[31-i]; |
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2380 if( time == 0 ) continue; // not yet: still searh table. |
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2381 |
|
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2382 ascent = depth = char_O_deco_depth[31-i] & 0x7F; |
|
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2383 if( i < 31 ) |
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2384 ascent -= char_O_deco_depth[30-i] & 0x7F; |
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2385 } |
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2386 |
|
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2387 // Gas switch depth ? |
| 338 | 2388 for(j=0; j<NUM_GAS; ++j) |
|
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2389 { |
|
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2390 if( depth <= char_I_deco_gas_change[j] ) |
| 241 | 2391 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
| 224 | 2392 gas = j; |
|
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2393 } |
|
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2394 |
|
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2395 // usage during stop: |
| 224 | 2396 // Note: because first gas is not in there, increment gas+1 |
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2397 if( deco_usage > 0.0 ) |
| 265 | 2398 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
| 2399 * time // in minutes. | |
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2400 * deco_usage // in xxx / min @ 1bar. |
| 265 | 2401 // Plus usage during ascent to the next stop, at 10m/min. |
| 2402 + (depth*0.1 + 1.0) | |
|
275
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2403 * ascent*0.1 // metre --> min |
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2404 * deco_usage; |
| 265 | 2405 else |
| 2406 volumes[gas] = 65535.0; | |
|
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2407 } |
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2408 |
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2409 //---- convert results for the ASM interface ----------------------------- |
| 338 | 2410 for(i=0; i<NUM_GAS; ++i) |
|
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2411 if( volumes[i] > 65534.0 ) |
| 224 | 2412 int_O_gas_volumes[i] = 65535; |
|
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2413 else |
|
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2414 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); |
| 116 | 2415 } |
| 2416 | |
| 167 | 2417 ////////////////////////////////////////////////////////////////////////////// |
| 2418 | |
| 116 | 2419 void deco_push_tissues_to_vault(void) |
| 2420 { | |
| 167 | 2421 overlay unsigned char x; |
|
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2422 RESET_C_STACK |
| 167 | 2423 |
| 116 | 2424 cns_vault = CNS_fraction; |
| 339 | 2425 for (x=0;x<NUM_COMP;x++) |
| 2426 { | |
| 2427 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
| 2428 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
| 2429 } | |
| 116 | 2430 } |
| 167 | 2431 |
| 116 | 2432 void deco_pull_tissues_from_vault(void) |
| 2433 { | |
| 167 | 2434 overlay unsigned char x; |
|
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2435 RESET_C_STACK |
| 167 | 2436 |
| 339 | 2437 for (x=0; x<NUM_COMP; x++) |
| 2438 { | |
| 2439 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
| 2440 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
| 2441 } | |
| 292 | 2442 |
| 2443 // Restore both CNS variable, too. | |
| 2444 CNS_fraction = cns_vault; | |
| 514 | 2445 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
| 116 | 2446 } |
| 2447 | |
| 167 | 2448 ////////////////////////////////////////////////////////////////////////////// |
| 2449 // | |
| 184 | 2450 #ifndef CROSS_COMPILE |
| 2451 void main() {} | |
| 2452 #endif |