Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 401:6ed12fad3b97
Ignore 5mbar pressure sensor noise in surface screen
| author | heinrichsweikamp |
|---|---|
| date | Sun, 26 Jun 2011 18:07:51 +0200 |
| parents | 681bdc91114c |
| children | b9cf06de8aca |
| 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 | |
| 11 // Copyright (C) 2008 HeinrichsWeikamp GbR | |
| 12 // | |
| 13 // This program is free software: you can redistribute it and/or modify | |
| 14 // it under the terms of the GNU General Public License as published by | |
| 15 // the Free Software Foundation, either version 3 of the License, or | |
| 16 // (at your option) any later version. | |
| 17 // | |
| 18 // This program is distributed in the hope that it will be useful, | |
| 19 // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 20 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 21 // GNU General Public License for more details. | |
| 22 // | |
| 23 // You should have received a copy of the GNU General Public License | |
| 24 // along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 25 // | |
| 26 ////////////////////////////////////////////////////////////////////////////// | |
| 27 | |
| 28 // ***************************** | |
| 29 // ** I N T R O D U C T I O N ** | |
| 30 // ***************************** | |
| 31 // | |
| 32 // OSTC | |
| 33 // | |
| 34 // code: | |
| 35 // p2_deco_main_c_v101.c | |
| 36 // part2 of the OSTC code | |
| 37 // code with constant O2 partial pressure routines | |
| 38 // under construction !! | |
| 39 // | |
| 40 // summary: | |
| 41 // decompression routines | |
| 42 // for the OSTC experimental project | |
| 43 // written by Christian Weikamp | |
| 44 // last revision __________ | |
| 45 // comments added _________ | |
| 46 // | |
| 47 // additional files: | |
| 48 // p2_tables_v100.romdata (other files) | |
| 49 // 18f4685_ostc_v100.lkr (linker script) | |
| 50 // | |
| 51 // history: | |
| 52 // 01/03/08 v100: first release candidate | |
| 53 // 03/13/08 v101: start of programming ppO2 code | |
| 54 // 03/13/25 v101a: backup of interrim version with ppO2 calculation | |
| 55 // 03/13/25 v101: open circuit gas change during deco | |
| 56 // 03/13/25 v101: CNS_fraction calculation | |
| 57 // 03/13/26 v101: optimization of tissue calc routines | |
| 58 // 07/xx/08 v102a: debug of bottom time routine | |
| 59 // 09/xx/08 v102d: Gradient Factor Model implemenation | |
| 60 // 10/10/08 v104: renamed to build v103 for v118 stable | |
| 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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293
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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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293
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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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334
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79 // 2011/05/02: [jDG] Added "Future TTS" function (CF58). |
| 338 | 80 // 2011/05/17: [jDG] Various cleanups. |
| 116 | 81 // |
| 167 | 82 // TODO: |
| 83 // + Allow to abort MD2 calculation (have to restart next time). | |
| 84 // | |
| 85 // Literature: | |
| 200 | 86 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
| 116 | 87 // 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 |
| 88 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
| 89 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
| 90 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
| 91 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
| 167 | 92 // |
| 93 // | |
| 116 | 94 |
| 95 // ********************* | |
| 96 // ** I N C L U D E S ** | |
| 97 // ********************* | |
| 98 #include <math.h> | |
| 167 | 99 |
| 192 | 100 // *********************************************** |
| 101 // ** V A R I A B L E S D E F I N I T I O N S ** | |
| 102 // *********************************************** | |
| 103 | |
| 104 #include "p2_definitions.h" | |
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105 #define TEST_MAIN |
| 192 | 106 #include "shared_definitions.h" |
| 107 | |
| 200 | 108 // Water vapour partial pressure in the lumb. |
| 317 | 109 #define ppWater 0.0627 |
| 110 #define METER_TO_BAR 0.09985 | |
| 111 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
| 200 | 112 |
| 167 | 113 // ************************* |
| 114 // ** P R O T O T Y P E S ** | |
| 115 // ************************* | |
| 116 | |
| 117 static void calc_hauptroutine(void); | |
| 118 static void calc_nullzeit(void); | |
| 119 | |
| 192 | 120 static void calc_tissue(PARAMETER unsigned char period); |
| 258 | 121 static void calc_limit(void); |
| 192 | 122 |
| 167 | 123 static void clear_tissue(void); |
| 124 static void calc_ascenttime(void); | |
| 125 static void update_startvalues(void); | |
|
169
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126 static void clear_deco_table(void); |
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127 static void update_deco_table(void); |
| 192 | 128 |
| 129 static void backup_sim_pres_tissue(void); | |
| 130 static void restore_sim_pres_tissue(void); | |
| 131 static void sim_tissue(PARAMETER unsigned char period); | |
| 132 static void sim_limit(PARAMETER float GF_current); | |
|
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133 static void sim_extra_time(void); |
| 368 | 134 static void calc_dive_interval(void); |
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135 |
| 167 | 136 static void calc_gradient_factor(void); |
| 137 static void calc_wo_deco_step_1_min(void); | |
| 138 | |
| 139 static void calc_hauptroutine_data_input(void); | |
| 140 static void calc_hauptroutine_update_tissues(void); | |
| 141 static void calc_hauptroutine_calc_deco(void); | |
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142 static void sim_ascent_to_first_stop(void); |
| 167 | 143 |
| 241 | 144 static unsigned char gas_switch_deepest(void); |
| 145 static void gas_switch_set(void); | |
| 217 | 146 |
| 241 | 147 static unsigned char calc_nextdecodepth(void); |
| 116 | 148 |
| 200 | 149 //---- Bank 4 parameters ----------------------------------------------------- |
| 163 | 150 #pragma udata bank4=0x400 |
| 116 | 151 |
| 152 static float temp_limit; | |
| 153 static float GF_low; | |
| 154 static float GF_high; | |
| 155 static float GF_delta; | |
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156 static float low_depth; // Depth of deepest stop |
| 192 | 157 static float locked_GF_step; // GF_delta / low_depth |
| 158 | |
| 159 static unsigned char temp_depth_limit; | |
| 171 | 160 |
| 192 | 161 // Simulation context: used to predict ascent. |
| 162 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 163 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 116 | 164 |
| 192 | 165 // Real context: what we are doing now. |
| 166 static float calc_lead_tissue_limit; // | |
| 116 | 167 |
| 338 | 168 static unsigned char internal_deco_time[NUM_STOPS]; |
| 169 static unsigned char internal_deco_depth[NUM_STOPS]; | |
| 116 | 170 |
| 171 static float cns_vault; | |
| 339 | 172 static float pres_tissue_N2_vault[NUM_COMP]; |
| 173 static float pres_tissue_He_vault[NUM_COMP]; | |
| 116 | 174 |
| 163 | 175 //---- Bank 5 parameters ----------------------------------------------------- |
| 176 #pragma udata bank5=0x500 | |
| 177 | |
| 167 | 178 static unsigned char ci; |
| 116 | 179 static float pres_respiration; |
| 180 static float pres_surface; | |
| 181 static float temp_deco; | |
| 236 | 182 static float ppN2; |
| 200 | 183 static float ppHe; |
| 116 | 184 static float temp_tissue; |
| 200 | 185 static float N2_ratio; // Breathed gas nitrogen ratio. |
| 186 static float He_ratio; // Breathed gas helium ratio. | |
| 187 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
| 188 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
| 189 static float var_He_a; // Bühlmann a, for current He tissue. | |
| 190 static float var_He_b; // Bühlmann b, for current He tissue. | |
| 191 static float var_N2_e; // Exposition, for current N2 tissue. | |
| 192 static float var_He_e; // Exposition, for current He tissue. | |
| 116 | 193 |
| 338 | 194 static float pres_diluent; // new in v.101 |
| 195 static float const_ppO2; // new in v.101 | |
| 116 | 196 |
| 241 | 197 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
| 198 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
| 203 | 199 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
| 200 static unsigned short sim_dive_mins; // Simulated dive time. | |
| 200 | 201 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
| 202 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
| 203 static float CNS_fraction; // new in v.101 | |
| 204 static float float_saturation_multiplier; // new in v.101 | |
| 205 static float float_desaturation_multiplier; // new in v.101 | |
| 338 | 206 static float float_deco_distance; // new in v.101 |
| 207 static char flag_in_divemode; // new in v.108 | |
| 167 | 208 |
| 338 | 209 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
| 167 | 210 |
| 163 | 211 //---- Bank 6 parameters ----------------------------------------------------- |
| 212 #pragma udata bank6=0x600 | |
| 116 | 213 |
| 339 | 214 float pres_tissue_N2[NUM_COMP]; |
| 215 float pres_tissue_He[NUM_COMP]; | |
| 116 | 216 |
| 163 | 217 //---- Bank 7 parameters ----------------------------------------------------- |
| 218 #pragma udata bank7=0x700 | |
| 219 | |
| 339 | 220 float sim_pres_tissue_N2[NUM_COMP]; // 32 floats = 128 bytes. |
| 221 float sim_pres_tissue_He[NUM_COMP]; // 32 floats = 128 bytes. | |
| 222 static float sim_pres_tissue_backup_N2[NUM_COMP]; | |
| 223 static float sim_pres_tissue_backup_He[NUM_COMP]; | |
| 116 | 224 |
| 163 | 225 //---- Bank 8 parameters ----------------------------------------------------- |
| 116 | 226 #pragma udata bank8=0x800 |
| 163 | 227 |
| 116 | 228 static char md_pi_subst[256]; |
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229 #define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
| 116 | 230 |
| 163 | 231 //---- Bank 9 parameters ----------------------------------------------------- |
| 167 | 232 #pragma udata bank9=0x900 |
| 116 | 233 |
| 163 | 234 static char md_state[48]; // DONT MOVE !! // has to be at the beginning of bank 9 for the asm code!!! |
| 116 | 235 |
| 164 | 236 // internal, dbg: |
| 167 | 237 static unsigned char DBG_char_I_deco_model; // new in v.108. |
| 164 | 238 static unsigned char DBG_char_I_depth_last_deco; // new in v.108 |
| 212 | 239 static unsigned char DBG_deco_gas_change; // new in v.108 |
| 224 | 240 static unsigned char DBG_deco_N2_ratio; // new in v.108 |
| 241 static unsigned char DBG_deco_He_ratio; // new in v.108 | |
| 164 | 242 static float DBG_pres_surface; // new in v.108 |
| 243 static float DBG_GF_low; // new in v.108 | |
| 244 static float DBG_GF_high; // new in v.108 | |
| 245 static float DBG_const_ppO2; // new in v.108 | |
| 246 static float DBG_float_saturation_multiplier; // new in v.108 | |
| 247 static float DBG_float_desaturation_multiplier; // new in v.108 | |
| 248 static float DBG_float_deco_distance; // new in v.108 | |
| 249 static float DBG_N2_ratio; // new in v.108 | |
| 250 static float DBG_He_ratio; // new in v.108 | |
| 251 | |
| 167 | 252 ////////////////////////////////////////////////////////////////////////////// |
| 253 ////////////////////////////////////////////////////////////////////////////// | |
| 254 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 255 ////////////////////////////////////////////////////////////////////////////// | |
| 256 ////////////////////////////////////////////////////////////////////////////// | |
| 257 // | |
| 258 // End of PROM code is 17F00, So push tables on PROM top... | |
| 259 // | |
| 260 #pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. | |
| 261 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) | |
| 116 | 262 |
| 167 | 263 // Magic table to compute the MD2 HASH |
| 264 // | |
| 265 #pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... | |
| 203 | 266 rom const rom unsigned short md_pi[] = |
| 116 | 267 { |
| 268 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 | |
| 269 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA | |
| 270 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 | |
| 271 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A | |
| 272 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 | |
| 273 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 | |
| 274 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 | |
| 275 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 | |
| 276 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 | |
| 277 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F | |
| 278 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 | |
| 279 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 | |
| 280 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A | |
| 281 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 | |
| 282 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A | |
| 283 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 | |
| 284 }; | |
| 285 | |
| 167 | 286 ////////////////////////////////////////////////////////////////////////////// |
| 287 ////////////////////////////////////////////////////////////////////////////// | |
| 288 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 289 ////////////////////////////////////////////////////////////////////////////// | |
| 290 ////////////////////////////////////////////////////////////////////////////// | |
| 291 // | |
| 116 | 292 // all new in v.102 |
| 293 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 294 | |
| 295 #pragma code p2_deco = 0x0C000 | |
| 296 | |
| 167 | 297 ////////////////////////////////////////////////////////////////////////////// |
| 298 // DBS - debug on start of dive | |
| 299 // | |
| 300 static void create_dbs_set_dbg_and_ndl20mtr(void) | |
| 116 | 301 { |
| 167 | 302 overlay char i; // Local loop index. |
| 303 | |
| 304 //---- Reset DEBUG bit fields -------------------------------------------- | |
| 116 | 305 int_O_DBS_bitfield = 0; |
| 306 int_O_DBS2_bitfield = 0; | |
| 307 if(int_O_DBG_pre_bitfield & DBG_RUN) | |
| 308 int_O_DBG_pre_bitfield = DBG_RESTART; | |
| 309 else | |
| 310 int_O_DBG_pre_bitfield = DBG_RUN; | |
| 311 int_O_DBG_post_bitfield = 0; | |
| 167 | 312 |
| 313 //---- Set 20meters ND limit --------------------------------------------- | |
| 116 | 314 char_O_NDL_at_20mtr = 255; |
| 315 | |
| 167 | 316 //---- Copy all dive parameters ------------------------------------------ |
| 116 | 317 DBG_N2_ratio = N2_ratio; |
| 318 DBG_He_ratio = He_ratio; | |
| 319 DBG_char_I_deco_model = char_I_deco_model; | |
| 320 DBG_char_I_depth_last_deco = char_I_depth_last_deco; | |
| 321 DBG_pres_surface = pres_surface; | |
| 322 DBG_GF_low = GF_low; | |
| 323 DBG_GF_high = GF_high; | |
| 324 DBG_const_ppO2 = const_ppO2; | |
| 224 | 325 DBG_deco_N2_ratio = char_I_deco_N2_ratio[0]; |
| 326 DBG_deco_He_ratio = char_I_deco_He_ratio[0]; | |
| 225 | 327 DBG_deco_gas_change = deco_gas_change[0]; |
| 116 | 328 DBG_float_saturation_multiplier = float_saturation_multiplier; |
| 329 DBG_float_desaturation_multiplier = float_desaturation_multiplier; | |
| 330 DBG_float_deco_distance = float_deco_distance; | |
| 331 | |
| 167 | 332 //---- Setup some error (?) conditions ----------------------------------- |
| 116 | 333 if(char_I_deco_model) |
| 334 int_O_DBS_bitfield |= DBS_mode; | |
| 335 if(const_ppO2) | |
| 336 int_O_DBS_bitfield |= DBS_ppO2; | |
| 339 | 337 for(i = 0; i < NUM_COMP; i++) |
| 338 if(pres_tissue_He[i]) | |
| 116 | 339 int_O_DBS_bitfield |= DBS_HE_sat; |
| 340 if(float_saturation_multiplier < 0.99) | |
| 341 int_O_DBS_bitfield |= DBS_SAT2l; | |
| 342 if(float_saturation_multiplier > 1.3) | |
| 343 int_O_DBS_bitfield |= DBS_SAT2h; | |
| 344 if(GF_low < 0.19) | |
| 345 int_O_DBS_bitfield |= DBS_GFLOW2l; | |
| 346 if(GF_low > 1.01) | |
| 347 int_O_DBS_bitfield |= DBS_GFLOW2h; | |
| 348 if(GF_high < 0.6) | |
| 349 int_O_DBS_bitfield |= DBS_GFHGH2l; | |
| 350 if(GF_high > 1.01) | |
| 351 int_O_DBS_bitfield |= DBS_GFHGH2h; | |
| 352 if((N2_ratio + He_ratio) > 0.95) | |
| 353 int_O_DBS_bitfield |= DBS_GASO22l; | |
| 354 if((N2_ratio + He_ratio) < 0.05) | |
| 355 int_O_DBS_bitfield |= DBS_GASO22h; | |
| 356 if(float_deco_distance > 0.25) | |
| 357 int_O_DBS_bitfield |= DBS_DIST2h; | |
| 358 if(char_I_depth_last_deco > 8) | |
| 359 int_O_DBS_bitfield |= DBS_LAST2h; | |
| 224 | 360 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) > 95)) |
| 116 | 361 int_O_DBS_bitfield |= DBS_DECOO2l; |
| 224 | 362 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) < 5)) |
| 116 | 363 int_O_DBS_bitfield |= DBS_DECOO2h; |
| 364 if(pres_respiration > 3.0) | |
| 365 int_O_DBS2_bitfield |= DBS2_PRES2h; | |
| 366 if(pres_surface - pres_respiration > 0.2) | |
| 367 int_O_DBS2_bitfield |= DBS2_PRES2l; | |
| 368 if(pres_surface < 0.75) | |
| 369 int_O_DBS2_bitfield |= DBS2_SURF2l; | |
| 370 if(pres_surface > 1.11) | |
| 371 int_O_DBS2_bitfield |= DBS2_SURF2h; | |
| 372 if(float_desaturation_multiplier < 0.70) | |
| 373 int_O_DBS2_bitfield |= DBS2_DESAT2l; | |
| 374 if(float_desaturation_multiplier > 1.01) | |
| 375 int_O_DBS2_bitfield |= DBS2_DESAT2h; | |
| 376 if(GF_low > GF_high) | |
| 377 int_O_DBS2_bitfield |= DBS2_GFDneg; | |
| 378 } | |
| 379 | |
| 167 | 380 ////////////////////////////////////////////////////////////////////////////// |
| 381 // DBG - set DBG to end_of_dive | |
| 382 // | |
| 383 static void set_dbg_end_of_dive(void) | |
| 116 | 384 { |
| 385 int_O_DBG_pre_bitfield &= (~DBG_RUN); | |
| 386 int_O_DBG_post_bitfield &= (~DBG_RUN); | |
| 387 } | |
| 388 | |
| 167 | 389 ////////////////////////////////////////////////////////////////////////////// |
| 390 // DBG - NDL at first 20 m. hit | |
| 391 // | |
| 392 static void check_ndl(void) | |
| 116 | 393 { |
| 167 | 394 if( char_O_NDL_at_20mtr == 255 // Still in NDL mode ? |
| 395 && int_I_pres_respiration > 3000 // And we hit the 20m limit ? | |
| 396 ) | |
| 116 | 397 { |
| 167 | 398 char_O_NDL_at_20mtr = char_O_nullzeit; // change to max bottom time. |
| 399 if( char_O_NDL_at_20mtr == 255) // and avoid confusion. | |
| 184 | 400 char_O_NDL_at_20mtr = 254; |
| 116 | 401 } |
| 402 } | |
| 403 | |
| 167 | 404 ////////////////////////////////////////////////////////////////////////////// |
| 405 // DBG - multi main during dive | |
| 406 // | |
| 184 | 407 static void check_dbg(PARAMETER char is_post_check) |
| 116 | 408 { |
| 203 | 409 overlay unsigned short temp_DBS = 0; |
| 200 | 410 overlay unsigned char i; // Local loop index. |
| 167 | 411 |
| 116 | 412 if( (DBG_N2_ratio != N2_ratio) || (DBG_He_ratio != He_ratio) ) |
| 413 temp_DBS |= DBG_c_gas; | |
| 414 if(DBG_const_ppO2 != const_ppO2) | |
| 415 temp_DBS |= DBG_c_ppO2; | |
| 167 | 416 if( DBG_float_saturation_multiplier != float_saturation_multiplier |
| 417 || DBG_float_desaturation_multiplier != float_desaturation_multiplier | |
| 418 ) | |
| 116 | 419 temp_DBS |= DBG_CdeSAT; |
| 420 if(DBG_char_I_deco_model != char_I_deco_model) | |
| 421 temp_DBS |= DBG_C_MODE; | |
| 422 if(DBG_pres_surface != pres_surface) | |
| 423 temp_DBS |= DBG_C_SURF; | |
| 167 | 424 |
| 425 if( !DBS_HE_sat && !He_ratio) | |
| 339 | 426 for(i = 0; i < NUM_COMP; i++) |
| 427 if(pres_tissue_He[i]) | |
| 116 | 428 temp_DBS |= DBG_HEwoHE; |
| 167 | 429 |
| 225 | 430 if( DBG_deco_gas_change != deco_gas_change[0] |
| 224 | 431 || DBG_deco_N2_ratio != char_I_deco_N2_ratio[0] |
| 432 || DBG_deco_He_ratio != char_I_deco_He_ratio[0] ) | |
| 116 | 433 temp_DBS |= DBG_C_DGAS; |
| 167 | 434 |
| 116 | 435 if(DBG_float_deco_distance != float_deco_distance) |
| 436 temp_DBS |= DBG_C_DIST; | |
| 437 if(DBG_char_I_depth_last_deco != char_I_depth_last_deco) | |
| 438 temp_DBS |= DBG_C_LAST; | |
| 167 | 439 if( DBG_GF_low != GF_low |
| 440 || DBG_GF_high != GF_high ) | |
| 116 | 441 temp_DBS |= DBG_C_GF; |
| 442 if(pres_respiration > 13.0) | |
| 443 temp_DBS |= DBG_PHIGH; | |
| 444 if(pres_surface - pres_respiration > 0.2) | |
| 445 temp_DBS |= DBG_PLOW; | |
| 446 if(is_post_check) | |
| 447 int_O_DBG_post_bitfield |= temp_DBS; | |
| 448 else | |
| 449 int_O_DBG_pre_bitfield |= temp_DBS; | |
| 450 } | |
| 451 | |
| 167 | 452 ////////////////////////////////////////////////////////////////////////////// |
| 453 // DBG - prior to calc. of dive | |
| 454 // | |
| 455 static void check_pre_dbg(void) | |
| 116 | 456 { |
| 457 check_dbg(0); | |
| 458 } | |
| 459 | |
| 167 | 460 ////////////////////////////////////////////////////////////////////////////// |
| 461 // DBG - after decocalc of dive | |
| 462 // | |
| 463 static void check_post_dbg(void) | |
| 116 | 464 { |
| 465 check_dbg(1); | |
| 466 } | |
| 467 | |
| 165 | 468 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 469 ////////////////////////////////////////////////////////////////////////////// |
| 470 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 471 ////////////////////////////////////////////////////////////////////////////// | |
| 472 ////////////////////////////////////////////////////////////////////////////// | |
| 473 | |
| 235 | 474 ////////////////////////////////////////////////////////////////////////////// |
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475 // Bump to blue-screen when an assert is wrong |
| 235 | 476 #ifdef __DEBUG |
| 477 void assert_failed(PARAMETER short int line) | |
| 478 { | |
| 479 extern void PLED_resetdebugger(void); | |
| 480 extern unsigned short temp10; | |
| 481 | |
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482 temp10 = line; // Show source line number as stack depth. |
| 235 | 483 PLED_resetdebugger(); |
| 484 } | |
| 485 #endif | |
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486 |
| 235 | 487 ////////////////////////////////////////////////////////////////////////////// |
| 488 // When calling C code from ASM context, the data stack pointer and | |
| 489 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
| 490 | |
| 491 #ifdef CROSS_COMPILE | |
| 492 # define RESET_C_STACK | |
| 493 #else | |
| 494 # ifdef __DEBUG | |
| 495 # define RESET_C_STACK fillDataStack(); | |
| 496 void fillDataStack(void) | |
| 497 { | |
| 498 _asm | |
| 499 LFSR 1,C_STACK | |
| 500 MOVLW 0xCC | |
| 501 loop: MOVWF POSTINC1,0 | |
| 502 TSTFSZ FSR1L,0 | |
| 503 BRA loop | |
| 504 | |
| 505 LFSR 1,C_STACK | |
| 506 LFSR 2,C_STACK | |
| 507 _endasm | |
| 508 } | |
| 509 # else | |
| 510 # define RESET_C_STACK \ | |
| 511 _asm \ | |
| 512 LFSR 1, C_STACK \ | |
| 513 LFSR 2, C_STACK \ | |
| 514 _endasm | |
| 515 # endif | |
| 516 #endif | |
| 517 | |
| 518 ////////////////////////////////////////////////////////////////////////////// | |
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519 // Read CF values from the C code. |
| 235 | 520 |
| 203 | 521 static short read_custom_function(PARAMETER unsigned char cf) |
| 167 | 522 { |
| 184 | 523 #ifdef CROSS_COMPILE |
| 524 extern unsigned short custom_functions[]; | |
| 525 return custom_functions[cf]; | |
| 526 #else | |
| 167 | 527 extern unsigned char hi, lo; |
| 528 extern void getcustom15(); | |
| 529 _asm | |
| 530 movff cf,WREG | |
| 531 call getcustom15,0 | |
| 532 movff lo,PRODL | |
| 533 movff hi,PRODH | |
| 534 _endasm | |
| 184 | 535 #endif |
| 167 | 536 } |
| 537 | |
| 538 ////////////////////////////////////////////////////////////////////////////// | |
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539 // Fast subroutine to read RTC timer 3. |
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540 // Note: result is in 1/32 of msecs. |
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541 static unsigned short tmr3(void) |
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542 { |
| 261 | 543 #ifndef CROSS_COMPILE |
|
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544 _asm |
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545 movff 0xfb2,PRODL // TMR3L |
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546 movff 0xfb3,PRODH // TMR3H |
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547 _endasm // result in PRODH:PRODL. |
| 261 | 548 #else |
| 549 return 0; | |
| 550 #endif | |
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551 } |
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552 |
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553 ////////////////////////////////////////////////////////////////////////////// |
| 258 | 554 // read buhlmann tables A and B for compatriment ci |
| 555 // | |
| 556 static void read_buhlmann_coefficients(void) | |
| 165 | 557 { |
| 338 | 558 |
| 184 | 559 #ifndef CROSS_COMPILE |
| 167 | 560 // Note: we don't use far rom pointer, because the |
| 338 | 561 // 24 bits is too complex, hence we have to set |
| 167 | 562 // the UPPER page ourself... |
| 563 // --> Set zero if tables are moved to lower pages ! | |
| 564 _asm | |
| 565 movlw 1 | |
| 566 movwf TBLPTRU,0 | |
| 567 _endasm | |
| 184 | 568 #endif |
| 258 | 569 |
| 338 | 570 assert( 0 <= ci && ci < NUM_COMP ); |
| 571 | |
| 572 // Use an interleaved array (AoS) to access coefficients with a | |
| 573 // single addressing. | |
| 574 { | |
| 575 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
| 576 var_N2_a = *ptr++; | |
| 577 var_N2_b = *ptr++; | |
| 578 var_He_a = *ptr++; | |
| 579 var_He_b = *ptr++; | |
| 580 } | |
| 167 | 581 |
| 165 | 582 // Check reading consistency: |
| 583 if( (var_N2_a < 0.231) | |
| 584 || (var_N2_a > 1.27) | |
| 585 || (var_N2_b < 0.504) | |
| 586 || (var_N2_b > 0.966) | |
| 587 || (var_He_a < 0.510) | |
| 588 || (var_He_a > 1.75) | |
| 589 || (var_He_b < 0.423) | |
| 590 || (var_He_b > 0.927) | |
| 591 ) | |
| 258 | 592 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; |
| 593 } | |
| 594 | |
| 595 ////////////////////////////////////////////////////////////////////////////// | |
| 596 // read buhlmann tables for compatriment ci | |
| 597 // If period == 0 : 2sec interval | |
| 598 // 1 : 1 min interval | |
| 599 // 2 : 10 min interval. | |
| 600 static void read_buhlmann_times(PARAMETER char period) | |
| 601 { | |
| 602 #ifndef CROSS_COMPILE | |
| 603 // Note: we don't use far rom pointer, because the | |
| 604 // 24 bits is to complex, hence we have to set | |
| 605 // the UPPER page ourself... | |
| 606 // --> Set zero if tables are moved to lower pages ! | |
| 607 _asm | |
| 608 movlw 1 | |
| 609 movwf TBLPTRU,0 | |
| 610 _endasm | |
| 611 #endif | |
| 338 | 612 |
| 613 assert( 0 <= ci && ci < NUM_COMP ); | |
| 258 | 614 |
| 165 | 615 // Integration intervals. |
| 167 | 616 switch(period) |
| 165 | 617 { |
| 618 case 0: //---- 2 sec ----------------------------------------------------- | |
| 338 | 619 { |
| 620 overlay rom const float* ptr = &e2secs[2*ci]; | |
| 621 var_N2_e = *ptr++; | |
| 622 var_He_e = *ptr++; | |
| 623 } | |
| 165 | 624 |
| 625 // Check reading consistency: | |
| 626 if( (var_N2_e < 0.0000363) | |
| 627 || (var_N2_e > 0.00577) | |
| 628 || (var_He_e < 0.0000961) | |
| 629 || (var_He_e > 0.150) | |
| 630 ) | |
| 631 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 632 | |
| 633 break; | |
| 634 | |
| 635 case 1: //---- 1 min ----------------------------------------------------- | |
| 338 | 636 { |
| 637 overlay rom const float* ptr = &e1min[2*ci]; | |
| 638 var_N2_e = *ptr++; | |
| 639 var_He_e = *ptr++; | |
| 640 } | |
| 165 | 641 |
| 642 // Check reading consistency: | |
| 643 if( (var_N2_e < 1.09E-3) | |
| 644 || (var_N2_e > 0.1592) | |
| 645 || (var_He_e < 0.00288) | |
| 646 || (var_He_e > 0.3682) | |
| 647 ) | |
| 648 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 649 | |
| 650 break; | |
| 651 | |
| 652 case 2: //---- 10 min ---------------------------------------------------- | |
| 338 | 653 { |
| 654 overlay rom const float* ptr = &e10min[2*ci]; | |
| 655 var_N2_e = *ptr++; | |
| 656 var_He_e = *ptr++; | |
| 657 } | |
| 165 | 658 |
| 659 // Check reading consistency: | |
| 660 if( (var_N2_e < 0.01085) | |
| 661 || (var_N2_e > 0.82323) | |
| 662 || (var_He_e < 0.02846) | |
| 663 || (var_He_e > 0.98986) | |
| 664 ) | |
| 665 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 666 | |
| 667 break; | |
| 197 | 668 |
| 669 default: | |
| 670 assert(0); // Never go there... | |
| 165 | 671 } |
| 672 } | |
| 673 | |
| 674 ////////////////////////////////////////////////////////////////////////////// | |
|
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675 // calc_nextdecodepth |
| 165 | 676 // |
| 116 | 677 // new in v.102 |
| 165 | 678 // |
| 116 | 679 // INPUT, changing during dive: |
| 192 | 680 // low_depth |
| 167 | 681 // |
| 116 | 682 // INPUT, fixed during dive: |
| 167 | 683 // pres_surface |
| 684 // GF_delta | |
| 685 // GF_high | |
| 686 // GF_low | |
| 171 | 687 // char_I_depth_last_deco |
| 167 | 688 // float_deco_distance |
| 689 // | |
| 241 | 690 // RETURN TRUE iff a stop is needed. |
| 691 // | |
| 116 | 692 // OUTPUT |
| 171 | 693 // locked_GF_step |
| 167 | 694 // temp_depth_limt |
| 192 | 695 // low_depth |
| 167 | 696 // |
| 241 | 697 static unsigned char calc_nextdecodepth(void) |
| 167 | 698 { |
| 241 | 699 //--- Max ascent speed --------------------------------------------------- |
| 700 // Recompute leading gas limit, at current depth: | |
| 317 | 701 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
| 241 | 702 |
| 703 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 302 | 704 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
| 241 | 705 |
| 706 // Do we need to stop at current depth ? | |
| 707 overlay unsigned char need_stop = 0; | |
| 708 | |
| 709 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 710 | |
| 212 | 711 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
| 116 | 712 if (char_I_deco_model == 1) |
| 713 { | |
| 241 | 714 if( depth >= low_depth ) |
| 192 | 715 sim_limit( GF_low ); |
| 716 else | |
| 717 sim_limit( GF_high - depth * locked_GF_step ); | |
| 718 | |
| 719 // Stops are needed ? | |
| 720 if( sim_lead_tissue_limit > pres_surface ) | |
| 721 { | |
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722 // Compute tolerated depth, for the leading tissue [metre]: |
| 317 | 723 overlay float depth_tol = (sim_lead_tissue_limit - pres_surface) * BAR_TO_METER; |
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724 |
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725 // Deepest stop, in multiples of 3 metres. |
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726 overlay unsigned char first_stop = 3 * (short)(0.99999 + depth_tol * 0.33333 ); |
| 192 | 727 assert( first_stop < 128 ); |
| 171 | 728 |
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729 // Is it a new deepest needed stop ? If yes this is the reference for |
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730 // the varying gradient factor. So reset that: |
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731 if( depth_tol > min_depth && depth_tol > low_depth ) |
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732 { |
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733 // Store the deepest stop depth, as reference for GF_low. |
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734 low_depth = depth_tol; |
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735 locked_GF_step = GF_delta / low_depth; |
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736 } |
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737 |
| 264 | 738 #if defined(__DEBUG) || defined(CROSS_COMPILE) |
| 261 | 739 { |
| 740 // Extra testing code to make sure the first_stop formula | |
| 741 // and rounding provides correct depth: | |
| 317 | 742 overlay float pres_stop = first_stop * METER_TO_BAR |
| 261 | 743 + pres_surface; |
| 744 | |
| 745 // Keep GF_low until a first stop depth is found: | |
| 746 if( first_stop >= low_depth ) | |
| 747 sim_limit( GF_low ); | |
| 748 else | |
| 749 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 750 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 751 sim_limit( GF_high - first_stop * locked_GF_step ); | |
| 752 | |
| 302 | 753 // upper limit (lowest pressure tolerated), + 1mbar for rounding...: |
| 754 assert( sim_lead_tissue_limit < (pres_stop + 0.001) ); | |
| 261 | 755 } |
| 756 #endif | |
| 757 | |
| 212 | 758 // Apply correction for the shallowest stop. |
| 192 | 759 if( first_stop == 3 ) // new in v104 |
| 760 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 171 | 761 |
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762 // Because gradient factor at first_stop might be bigger than at |
| 261 | 763 // current depth, we might ascent a bit more. |
| 764 // Hence, check all stops until one is indeed higher than tolerated presure: | |
| 765 while(first_stop > 0) | |
| 192 | 766 { |
| 767 overlay unsigned char next_stop; // Next index (0..30) | |
| 768 overlay float pres_stop; // Next depth (0m..90m) | |
| 171 | 769 |
| 241 | 770 // Check max speed, or reaching surface. |
| 771 if( first_stop <= min_depth ) | |
| 772 break; | |
| 773 | |
| 774 // So, there is indeed a stop needed: | |
| 775 need_stop = 1; | |
| 776 | |
| 192 | 777 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
| 778 next_stop = 0; | |
| 216 | 779 else if( first_stop == 6 ) |
| 780 next_stop = char_I_depth_last_deco; | |
| 192 | 781 else |
| 782 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 167 | 783 |
| 317 | 784 pres_stop = next_stop * METER_TO_BAR |
| 192 | 785 + pres_surface; |
| 786 | |
| 212 | 787 // Keep GF_low until a first stop depth is found: |
| 788 if( next_stop >= low_depth ) | |
| 789 sim_limit( GF_low ); | |
| 790 else | |
| 791 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 792 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 793 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 171 | 794 |
| 192 | 795 // upper limit (lowest pressure tolerated): |
| 796 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 797 break; | |
| 798 | |
| 799 // Else, validate that stop and loop... | |
| 800 first_stop = next_stop; | |
| 212 | 801 } |
| 802 | |
| 803 // next stop is the last validated depth found, aka first_stop | |
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804 temp_depth_limit = first_stop; // Stop depth, in metre. |
| 192 | 805 } |
| 171 | 806 else |
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807 temp_depth_limit = 0; // stop depth, in metre. |
| 116 | 808 } |
| 167 | 809 else //---- ZH-L16 model ------------------------------------------------- |
| 116 | 810 { |
| 192 | 811 overlay float pres_gradient; |
| 812 | |
| 813 // Original model | |
| 116 | 814 // optimized in v.101 |
| 171 | 815 // char_I_depth_last_deco included in v.101 |
| 116 | 816 |
| 192 | 817 // Compute sim_lead_tissue_limit too, but just once. |
| 818 sim_limit(1.0); | |
| 819 | |
| 820 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 167 | 821 if (pres_gradient >= 0) |
| 116 | 822 { |
| 317 | 823 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
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824 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
| 241 | 825 need_stop = 1; // Hit. |
| 826 | |
| 827 // Implement last stop at 4m/5m/6m... | |
| 828 if( temp_depth_limit == 3 ) | |
| 829 temp_depth_limit = char_I_depth_last_deco; | |
| 171 | 830 } |
| 116 | 831 else |
| 241 | 832 temp_depth_limit = 0; |
| 171 | 833 } |
| 212 | 834 |
| 217 | 835 //---- Check gas change -------------------------------------------------- |
| 241 | 836 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
| 837 | |
| 838 return need_stop; | |
| 167 | 839 } |
| 116 | 840 |
| 167 | 841 ////////////////////////////////////////////////////////////////////////////// |
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842 // copy_deco_table |
| 167 | 843 // |
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844 // Buffer the stops, once computed, so we can continue to display them |
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845 // while computing the next set. |
| 167 | 846 // |
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847 static void copy_deco_table(void) |
| 116 | 848 { |
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849 // Copy depth of the first (deepest) stop, because when reversing |
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850 // order, it will be hard to find... |
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851 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
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852 char_O_first_deco_time = internal_deco_time [0]; |
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853 |
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854 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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855 { |
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856 overlay unsigned char x, y; |
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857 |
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858 //---- First: search the first non-null depth |
| 339 | 859 for(x=(NUM_STOPS-1); x != 0; --x) |
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860 if( internal_deco_depth[x] != 0 ) break; |
| 116 | 861 |
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862 //---- Second: copy to output table (in reverse order) |
| 338 | 863 for(y=0; y<NUM_STOPS; y++, --x) |
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864 { |
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865 char_O_deco_depth[y] = internal_deco_depth[x]; |
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866 char_O_deco_time [y] = internal_deco_time [x]; |
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867 |
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868 // Stop only once the last transfer is done. |
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869 if( x == 0 ) break; |
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870 } |
| 116 | 871 |
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872 //---- Third: fill table end with null |
| 339 | 873 for(y++; y<NUM_STOPS; y++) |
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874 { |
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875 char_O_deco_time [y] = 0; |
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876 char_O_deco_depth[y] = 0; |
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877 } |
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878 } |
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879 else //---- Straight copy ------------------------------------------------ |
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880 { |
| 167 | 881 overlay unsigned char x; |
| 882 | |
| 339 | 883 for(x=0; x<NUM_STOPS; x++) |
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884 { |
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885 char_O_deco_depth[x] = internal_deco_depth[x]; |
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886 char_O_deco_time [x] = internal_deco_time [x]; |
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887 } |
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888 } |
| 167 | 889 } |
| 116 | 890 |
| 167 | 891 ////////////////////////////////////////////////////////////////////////////// |
| 116 | 892 // temp_tissue_safety // |
| 167 | 893 // |
| 116 | 894 // outsourced in v.102 |
| 167 | 895 // |
| 896 // Apply safety factors for brand ZH-L16 model. | |
| 897 // | |
| 898 static void temp_tissue_safety(void) | |
| 116 | 899 { |
| 197 | 900 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
| 901 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 902 | |
| 167 | 903 if( char_I_deco_model == 0 ) |
| 116 | 904 { |
| 905 if (temp_tissue < 0.0) | |
| 126 | 906 temp_tissue *= float_desaturation_multiplier; |
| 116 | 907 else |
| 126 | 908 temp_tissue *= float_saturation_multiplier; |
| 116 | 909 } |
| 167 | 910 } |
| 116 | 911 |
| 167 | 912 ////////////////////////////////////////////////////////////////////////////// |
| 913 ////////////////////////////////////////////////////////////////////////////// | |
| 116 | 914 // ** THE JUMP-IN CODE ** |
| 915 // ** for the asm code ** | |
| 167 | 916 ////////////////////////////////////////////////////////////////////////////// |
| 917 ////////////////////////////////////////////////////////////////////////////// | |
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918 |
| 167 | 919 ////////////////////////////////////////////////////////////////////////////// |
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920 // Called every 2 seconds during diving. |
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921 // update tissues every time. |
| 184 | 922 // |
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923 // Every 6 seconds (or slower when TTS > 16): |
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924 // - update deco table (char_O_deco_time/depth) with new values. |
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925 // - update ascent time, |
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926 // - set status to zero (so we can check there is new results). |
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927 // |
| 116 | 928 void deco_calc_hauptroutine(void) |
| 929 { | |
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930 RESET_C_STACK |
| 116 | 931 calc_hauptroutine(); |
| 932 int_O_desaturation_time = 65535; | |
| 933 } | |
| 934 | |
| 167 | 935 ////////////////////////////////////////////////////////////////////////////// |
| 184 | 936 // Reset decompression model: |
| 937 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 938 // + Reset last stop to 0m | |
| 939 // + Reset all model output. | |
| 116 | 940 void deco_clear_tissue(void) |
| 941 { | |
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942 RESET_C_STACK |
| 116 | 943 clear_tissue(); |
| 944 } | |
| 945 | |
| 167 | 946 ////////////////////////////////////////////////////////////////////////////// |
| 278 | 947 // Called every 1 min during decoplanning. |
| 948 // Update tissues for 1 min. | |
| 949 // | |
| 950 void deco_calc_tissue(void) | |
| 951 { | |
| 952 RESET_C_STACK | |
| 953 calc_hauptroutine_update_tissues(); | |
| 954 } | |
| 955 | |
| 956 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 957 |
| 116 | 958 void deco_calc_wo_deco_step_1_min(void) |
| 959 { | |
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960 RESET_C_STACK |
| 116 | 961 calc_wo_deco_step_1_min(); |
| 962 deco_calc_desaturation_time(); | |
| 963 } | |
| 964 | |
| 167 | 965 ////////////////////////////////////////////////////////////////////////////// |
| 966 | |
| 368 | 967 void deco_calc_dive_interval(void) |
| 968 { | |
| 969 RESET_C_STACK | |
| 970 calc_dive_interval(); | |
| 971 } | |
| 972 | |
| 973 ////////////////////////////////////////////////////////////////////////////// | |
| 974 | |
| 116 | 975 void deco_debug(void) |
| 976 { | |
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977 RESET_C_STACK |
| 116 | 978 } |
| 979 | |
| 241 | 980 |
| 981 ////////////////////////////////////////////////////////////////////////////// | |
| 982 // Find current gas in the list (if any). | |
| 983 // | |
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984 // Input: char_I_current_gas. |
| 241 | 985 // |
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986 // Output: sim_gas_last_depth, temp_depth_limit. |
| 241 | 987 // |
| 988 static void gas_switch_find_current(void) | |
| 989 { | |
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990 assert( 0 <= char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
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991 |
| 388 | 992 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 |
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993 { |
| 388 | 994 sim_gas_last_used = char_I_current_gas; |
| 995 | |
| 996 // Note: if current is first gas, we must find it, but not set | |
| 997 // last depth change to surface. | |
| 998 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
| 999 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
| 241 | 1000 } |
| 388 | 1001 else |
| 1002 sim_gas_last_used = 0; // Gas 6 = manual set | |
| 241 | 1003 } |
| 1004 | |
| 167 | 1005 ////////////////////////////////////////////////////////////////////////////// |
| 217 | 1006 // Find deepest available gas. |
| 201 | 1007 // |
| 241 | 1008 // Input: temp_depth_limit, |
| 1009 // deco_gas_change[] | |
| 1010 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
| 212 | 1011 // |
| 241 | 1012 // RETURNS TRUE if a stop is needed for gas switch. |
| 1013 // | |
| 1014 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
| 212 | 1015 // |
| 241 | 1016 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
| 1017 // are null), or during the ascent to make sure we are not passing a | |
| 1018 // stop (in which case both can be already set). | |
| 1019 // | |
| 1020 static unsigned char gas_switch_deepest(void) | |
| 201 | 1021 { |
| 241 | 1022 overlay unsigned char switch_deco = 0, switch_last = 0; |
| 201 | 1023 |
| 1024 if (char_I_const_ppO2 == 0) | |
| 1025 { | |
| 225 | 1026 overlay unsigned char j; |
| 1027 | |
| 241 | 1028 // Loop over all enabled gas, to find the deepest one, |
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1029 // above last used gas, but below temp_depth_limit. |
| 338 | 1030 for(j=0; j<NUM_GAS; ++j) |
| 225 | 1031 { |
| 241 | 1032 // Gas not (yet) allowed ? Skip ! |
| 1033 if( temp_depth_limit > deco_gas_change[j] ) | |
| 1034 continue; | |
| 1035 | |
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1036 // Gas deeper (or equal) than the current one ? Skip ! |
| 241 | 1037 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
| 1038 continue; | |
| 1039 | |
| 1040 // First, or deeper ? | |
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1041 if( switch_deco < deco_gas_change[j] ) |
| 241 | 1042 { |
| 1043 switch_deco = deco_gas_change[j]; | |
| 388 | 1044 switch_last = j+1; // 1..5 |
| 241 | 1045 } |
| 225 | 1046 } |
| 201 | 1047 } |
| 1048 | |
| 203 | 1049 // If there is a better gas available |
| 241 | 1050 if( switch_deco ) |
| 201 | 1051 { |
| 241 | 1052 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
| 201 | 1053 |
| 241 | 1054 // Should restart gas-switch delay only when gas do changes... |
| 1055 assert( sim_gas_delay <= sim_dive_mins ); | |
| 217 | 1056 |
| 241 | 1057 sim_gas_last_depth = switch_deco; |
| 1058 sim_gas_last_used = switch_last; | |
| 1059 sim_gas_delay = read_custom_function(55); | |
| 217 | 1060 |
| 241 | 1061 // Apply depth correction ONLY if CF#55 is not null: |
| 1062 if( sim_gas_delay > 0 ) | |
| 225 | 1063 { |
| 241 | 1064 sim_gas_delay += sim_dive_mins; |
| 1065 temp_depth_limit = switch_deco; | |
| 1066 return 1; | |
| 225 | 1067 } |
| 241 | 1068 |
| 1069 return 0; | |
| 217 | 1070 } |
| 1071 | |
| 241 | 1072 sim_gas_delay = 0; |
| 1073 return 0; | |
| 217 | 1074 } |
| 1075 | |
| 1076 ////////////////////////////////////////////////////////////////////////////// | |
| 1077 // Calculate gas switches | |
| 1078 // | |
| 1079 // | |
| 1080 // Input: N2_ratio, He_ratio. | |
| 1081 // sim_gas_last_used | |
| 1082 // | |
| 1083 // Output: calc_N2_ratio, calc_He_ratio | |
| 1084 // | |
| 241 | 1085 static void gas_switch_set(void) |
| 217 | 1086 { |
| 338 | 1087 assert( 0 <= sim_gas_last_used && sim_gas_last_used <= NUM_GAS ); |
| 217 | 1088 |
| 388 | 1089 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. |
| 224 | 1090 { |
| 1091 calc_N2_ratio = N2_ratio; | |
| 1092 calc_He_ratio = He_ratio; | |
| 1093 } | |
| 1094 else | |
| 1095 { | |
| 1096 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
| 1097 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
| 217 | 1098 } |
| 201 | 1099 |
| 1100 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
| 1101 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
| 1102 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
| 1103 } | |
| 1104 | |
| 1105 ////////////////////////////////////////////////////////////////////////////// | |
| 1106 // | |
| 212 | 1107 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
| 1108 // temp_deco : simulated respiration pressure + security offset (deco_distance) | |
| 276 | 1109 // float_deco_distance : security factor. |
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1110 // Water-vapor pressure inside limbs (ppWater). |
| 212 | 1111 // |
| 236 | 1112 // Output: ppN2, ppHe. |
| 212 | 1113 // |
| 1114 static void sim_alveolar_presures(void) | |
| 201 | 1115 { |
| 212 | 1116 overlay float deco_diluent = temp_deco; // new in v.101 |
| 1117 | |
| 276 | 1118 // Take deco offset into account, but not at surface. |
| 1119 // Note: this should be done on ambiant pressure, hence before | |
| 1120 // computing the diluant partial pressure... | |
| 1121 if( deco_diluent > pres_surface ) | |
| 1122 deco_diluent += float_deco_distance; | |
| 1123 | |
| 212 | 1124 //---- CCR mode : deco gas switch ? -------------------------------------- |
| 276 | 1125 if( char_I_const_ppO2 != 0 ) |
| 201 | 1126 { |
| 276 | 1127 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
| 1128 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
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1129 // ppWater in the equations below: |
| 321 | 1130 deco_diluent -= const_ppO2; |
| 276 | 1131 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
| 212 | 1132 |
| 1133 if (deco_diluent > temp_deco) | |
| 1134 deco_diluent = temp_deco; | |
| 201 | 1135 } |
| 1136 | |
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1137 if( deco_diluent > ppWater ) |
| 201 | 1138 { |
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1139 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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1140 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
| 201 | 1141 } |
| 1142 else | |
| 1143 { | |
| 236 | 1144 ppN2 = 0.0; |
| 201 | 1145 ppHe = 0.0; |
| 1146 } | |
| 236 | 1147 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
| 201 | 1148 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
| 1149 } | |
| 1150 | |
| 1151 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 1152 // clear_tissue |
| 1153 // | |
| 165 | 1154 // optimized in v.101 (var_N2_a) |
| 167 | 1155 // |
| 1156 // preload tissues with standard pressure for the given ambient pressure. | |
| 1157 // Note: fixed N2_ratio for standard air. | |
| 201 | 1158 // |
| 167 | 1159 static void clear_tissue(void) |
| 116 | 1160 { |
| 1161 flag_in_divemode = 0; | |
| 1162 int_O_DBS_bitfield = 0; | |
| 1163 int_O_DBS2_bitfield = 0; | |
| 1164 int_O_DBG_pre_bitfield = 0; | |
| 1165 int_O_DBG_post_bitfield = 0; | |
| 1166 char_O_NDL_at_20mtr = 255; | |
| 1167 | |
| 167 | 1168 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
| 1169 N2_ratio = 0.7902; | |
| 212 | 1170 pres_respiration = int_I_pres_respiration * 0.001; |
| 164 | 1171 |
| 338 | 1172 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1173 { |
| 197 | 1174 // cycle through the 16 Bühlmann tissues |
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1175 overlay float p = N2_ratio * (pres_respiration - ppWater); |
| 339 | 1176 pres_tissue_N2[ci] = p; |
| 197 | 1177 |
| 1178 // cycle through the 16 Bühlmann tissues for Helium | |
| 339 | 1179 pres_tissue_He[ci] = 0.0; |
| 338 | 1180 } // for 0 to 15 |
| 116 | 1181 |
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1182 clear_deco_table(); |
| 126 | 1183 char_O_deco_status = 0; |
| 1184 char_O_nullzeit = 0; | |
| 168 | 1185 int_O_ascenttime = 0; |
| 126 | 1186 char_O_gradient_factor = 0; |
| 1187 char_O_relative_gradient_GF = 0; | |
| 197 | 1188 char_I_depth_last_deco = 0; // for compatibility with v.101pre_no_last_deco |
| 258 | 1189 |
| 1190 calc_lead_tissue_limit = 0.0; | |
| 1191 char_O_gtissue_no = 0; | |
| 167 | 1192 } |
| 116 | 1193 |
| 167 | 1194 ////////////////////////////////////////////////////////////////////////////// |
| 1195 // calc_hauptroutine | |
| 1196 // | |
| 1197 // this is the major code in dive mode calculates: | |
| 116 | 1198 // the tissues, |
| 167 | 1199 // the bottom time, |
| 1200 // and simulates the ascend with all deco stops. | |
| 171 | 1201 // |
| 1202 // The deco_state sequence is : | |
| 1203 // 3 (at surface) | |
| 1204 // +---> 0 : calc nullzeit | |
| 1205 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 1206 // | +-> 1 : simulate up to 16min of stops. | |
| 1207 // | +------< not finished | |
| 1208 // +--------< finish | |
| 1209 // | |
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1210 // Added steps 6,5 for @+5 calculation: |
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1211 // 6 = ascent to first stop (same as 2), except continue to 7 |
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1212 // 7 = same as 1, except loop to 7. |
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1213 // |
| 167 | 1214 static void calc_hauptroutine(void) |
| 116 | 1215 { |
| 241 | 1216 static unsigned char backup_gas_used = 0; |
| 1217 static unsigned char backup_gas_depth = 0; | |
| 217 | 1218 static unsigned char backup_gas_delay = 0; |
| 186 | 1219 |
| 116 | 1220 calc_hauptroutine_data_input(); |
| 1221 | |
| 1222 if(!flag_in_divemode) | |
| 1223 { | |
| 1224 flag_in_divemode = 1; | |
| 1225 create_dbs_set_dbg_and_ndl20mtr(); | |
| 1226 } | |
| 1227 else | |
| 1228 check_pre_dbg(); | |
| 1229 | |
| 1230 calc_hauptroutine_update_tissues(); | |
| 1231 calc_gradient_factor(); | |
| 1232 | |
| 167 | 1233 // toggle between calculation for nullzeit (bottom time), |
| 1234 // deco stops | |
| 1235 // and more deco stops (continue) | |
| 1236 switch( char_O_deco_status ) | |
| 116 | 1237 { |
| 186 | 1238 case 3: //---- At surface: start a new dive ------------------------------ |
| 1239 clear_deco_table(); | |
| 1240 copy_deco_table(); | |
| 200 | 1241 int_O_ascenttime = 0; // Reset DTR. |
| 323 | 1242 int_O_extra_ascenttime = 0; |
| 200 | 1243 char_O_nullzeit = 0; // Reset bottom time. |
| 278 | 1244 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
| 201 | 1245 |
| 217 | 1246 // Values that should be reset just once for the full real dive. |
| 1247 // This is used to record the lowest stop for the whole dive, | |
| 1248 // Including ACCROSS all simulated ascent. | |
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1249 low_depth = 0.0; |
| 217 | 1250 |
| 1251 // Reset gas switch history. | |
| 241 | 1252 backup_gas_used = sim_gas_last_used = 0; |
| 1253 backup_gas_depth = sim_gas_last_depth = 0; | |
| 217 | 1254 backup_gas_delay = sim_gas_delay = 0; |
| 203 | 1255 sim_dive_mins = 0; |
| 1256 break; | |
| 186 | 1257 |
| 167 | 1258 case 0: //---- bottom time ----------------------------------------------- |
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1259 default: |
| 167 | 1260 calc_nullzeit(); |
| 1261 check_ndl(); | |
| 186 | 1262 char_O_deco_status = 2; // calc ascent next time. |
| 1263 break; | |
| 1264 | |
| 1265 case 2: //---- Simulate ascent to first stop ----------------------------- | |
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1266 case 6: // @+5min variation |
| 203 | 1267 // Check proposed gas at begin of ascent simulation |
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1268 sim_dive_mins = int_I_divemins; // Init current time. |
| 241 | 1269 |
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1270 gas_switch_find_current(); // Lookup for current gas & time. |
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1271 gas_switch_set(); // setup calc_ratio's |
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1272 |
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1273 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1274 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
| 203 | 1275 backup_gas_delay = sim_gas_delay; |
| 186 | 1276 |
| 1277 sim_ascent_to_first_stop(); | |
| 201 | 1278 |
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1279 // Calc stops next time (deco or gas switch). |
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1280 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
| 167 | 1281 break; |
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1282 |
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1283 case 1: //---- Simulate stops -------------------------------------------- |
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1284 case 5: // @+5 variation. |
| 167 | 1285 calc_hauptroutine_calc_deco(); |
| 186 | 1286 |
| 1287 // If simulation is finished, restore the GF low reference, so that | |
| 1288 // next ascent simulation is done from the current depth: | |
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1289 if( (char_O_deco_status & 3) == 0 ) |
| 186 | 1290 { |
| 241 | 1291 sim_gas_last_used = backup_gas_used; |
| 1292 sim_gas_last_depth = backup_gas_depth; | |
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1293 sim_gas_delay = backup_gas_delay; |
| 186 | 1294 } |
| 167 | 1295 break; |
| 116 | 1296 } |
| 167 | 1297 |
| 116 | 1298 check_post_dbg(); |
| 1299 } | |
| 1300 | |
| 167 | 1301 ////////////////////////////////////////////////////////////////////////////// |
| 1302 // calc_hauptroutine_data_input | |
| 1303 // | |
| 1304 // Reset all C-code dive parameters from their ASM-code values. | |
| 1305 // Detect gas change condition. | |
| 1306 // | |
| 116 | 1307 void calc_hauptroutine_data_input(void) |
| 1308 { | |
| 203 | 1309 overlay short int_temp; |
| 126 | 1310 |
| 197 | 1311 pres_respiration = int_I_pres_respiration * 0.001; |
| 1312 pres_surface = int_I_pres_surface * 0.001; | |
| 1313 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1314 He_ratio = char_I_He_ratio * 0.01; | |
| 1315 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
| 116 | 1316 |
| 126 | 1317 // ____________________________________________________ |
| 1318 // | |
| 1319 // _____________ G A S _ C H A N G E S ________________ | |
| 1320 // ____________________________________________________ | |
| 1321 | |
| 212 | 1322 // Keep a margin of 150mbar = 1.50m |
| 1323 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1324 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 126 | 1325 |
| 225 | 1326 deco_gas_change[0] = 0; |
| 1327 deco_gas_change[1] = 0; | |
| 1328 deco_gas_change[2] = 0; | |
| 1329 deco_gas_change[3] = 0; | |
| 1330 deco_gas_change[4] = 0; | |
| 116 | 1331 |
| 203 | 1332 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
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1333 if(char_I_deco_gas_change[0]) |
| 126 | 1334 { |
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1335 if( int_temp > 100 *(short)char_I_deco_gas_change[0] ) |
| 225 | 1336 deco_gas_change[0] = char_I_deco_gas_change[0]; |
| 126 | 1337 } |
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1338 if(char_I_deco_gas_change[1]) |
| 126 | 1339 { |
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1340 if( int_temp > 100 *(short)char_I_deco_gas_change[1] ) |
| 225 | 1341 deco_gas_change[1] = char_I_deco_gas_change[1]; |
| 126 | 1342 } |
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1343 if(char_I_deco_gas_change[2]) |
| 126 | 1344 { |
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1345 if( int_temp > 100 *(short)char_I_deco_gas_change[2] ) |
| 225 | 1346 deco_gas_change[2] = char_I_deco_gas_change[2]; |
| 126 | 1347 } |
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1348 if(char_I_deco_gas_change[3]) |
| 126 | 1349 { |
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1350 if( int_temp > 100 *(short)char_I_deco_gas_change[3] ) |
| 225 | 1351 deco_gas_change[3] = char_I_deco_gas_change[3]; |
| 126 | 1352 } |
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1353 if(char_I_deco_gas_change[4]) |
| 126 | 1354 { |
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1355 if( int_temp > 100 *(short)char_I_deco_gas_change[4] ) |
| 225 | 1356 deco_gas_change[4] = char_I_deco_gas_change[4]; |
| 126 | 1357 } |
| 116 | 1358 |
| 197 | 1359 const_ppO2 = char_I_const_ppO2 * 0.01; |
| 1360 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1361 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1362 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1363 GF_high = char_I_GF_High_percentage * 0.01; | |
| 126 | 1364 GF_delta = GF_high - GF_low; |
| 116 | 1365 } |
| 1366 | |
| 167 | 1367 ////////////////////////////////////////////////////////////////////////////// |
| 171 | 1368 // |
| 1369 // | |
| 116 | 1370 void calc_hauptroutine_update_tissues(void) |
| 1371 { | |
| 197 | 1372 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
| 1373 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
| 1374 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
| 237 | 1375 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1376 |
| 276 | 1377 pres_diluent = pres_respiration; |
| 307 | 1378 if( char_I_const_ppO2 != 0 ) // new in v.101 |
| 186 | 1379 { |
| 322 | 1380 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
| 1381 | |
| 276 | 1382 pres_diluent -= const_ppO2; // new in v.101 |
| 1383 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
| 321 | 1384 if( pres_diluent < 0.0 ) |
| 1385 pres_diluent = 0.0; | |
| 276 | 1386 if( pres_diluent > pres_respiration ) // new in v.101 |
| 1387 pres_diluent = pres_respiration; // new in v.101 | |
| 307 | 1388 |
| 321 | 1389 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
| 322 | 1390 |
| 326 | 1391 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
| 322 | 1392 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
| 1393 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
| 186 | 1394 } |
| 307 | 1395 |
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1396 if( pres_diluent > ppWater ) // new in v.101 |
| 116 | 1397 { |
| 307 | 1398 overlay float EAD, END; |
| 1399 | |
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1400 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1401 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
| 307 | 1402 |
| 1403 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
| 1404 // with plain air. | |
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1405 // ppN2 = 79% * (P_EAD - ppWater) |
| 307 | 1406 // EAD = (P_EAD - Psurface) * 10 |
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1407 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
| 317 | 1408 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
| 307 | 1409 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
| 317 | 1410 char_O_EAD = (unsigned char)(EAD + 0.5); |
| 307 | 1411 |
| 1412 // END : Equivalent Narcotic Dive. | |
| 1413 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
| 1414 // 0.23 btw). Hence the formula becomes: | |
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1415 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
| 317 | 1416 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
| 307 | 1417 // |
| 1418 // Source cited: | |
| 1419 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
| 1420 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
| 317 | 1421 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
| 307 | 1422 if( END < 0.0 || END > 245.5 ) END = 0.0; |
| 317 | 1423 char_O_END = (unsigned char)(END + 0.5); |
| 116 | 1424 } |
| 167 | 1425 else // new in v.101 |
| 116 | 1426 { |
| 236 | 1427 ppN2 = 0.0; // new in v.101 |
| 200 | 1428 ppHe = 0.0; // new in v.101 |
| 307 | 1429 char_O_EAD = char_O_END = 0; |
| 116 | 1430 } |
| 1431 | |
| 1432 if(!char_I_step_is_1min) | |
| 192 | 1433 calc_tissue(0); |
| 116 | 1434 else |
| 192 | 1435 calc_tissue(1); |
| 186 | 1436 |
| 192 | 1437 // Calc limit for surface, ie. GF_high. |
| 258 | 1438 calc_limit(); |
| 186 | 1439 |
| 203 | 1440 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
| 339 | 1441 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
| 192 | 1442 |
| 1443 // if guiding tissue can not be exposed to surface pressure immediately | |
| 1444 if( calc_lead_tissue_limit > pres_surface && char_O_deco_status == 0) | |
| 116 | 1445 { |
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1446 char_O_nullzeit = 0; // deco necessary |
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1447 char_O_deco_status = 2; // calculate ascent on next iteration. |
| 116 | 1448 } |
| 171 | 1449 } |
| 1450 | |
| 116 | 1451 |
| 167 | 1452 ////////////////////////////////////////////////////////////////////////////// |
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1453 // Compute stops. |
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1454 // |
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1455 // Note: because this can be very long, break on 16 iterations, and set state |
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1456 // to 0 when finished, or to 1 when needing to continue. |
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1457 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
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1458 // break the loop when total time > 512msec. |
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1459 // |
| 116 | 1460 void calc_hauptroutine_calc_deco(void) |
| 1461 { | |
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1462 overlay unsigned char loop; |
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1463 |
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1464 for(loop = 0; loop < 16; ++loop) |
| 116 | 1465 { |
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1466 // Limit loops to 512ms, using the RTC timer 3: |
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1467 if( tmr3() & (512*32) ) |
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1468 break; |
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1469 |
| 241 | 1470 // Do not ascent while doing a gas switch ? |
| 203 | 1471 if( sim_gas_delay <= sim_dive_mins ) |
| 1472 { | |
| 241 | 1473 if( calc_nextdecodepth() ) |
| 1474 { | |
| 1475 if( temp_depth_limit == 0 ) | |
| 1476 goto Surface; | |
| 116 | 1477 |
| 241 | 1478 //---- We hit a stop at temp_depth_limit --------------------- |
| 317 | 1479 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
| 241 | 1480 + pres_surface; // To absolute. |
| 1481 update_deco_table(); // Adds a one minute stops. | |
| 1482 } | |
| 1483 else | |
| 1484 { | |
| 1485 //---- No stop ----------------------------------------------- | |
| 317 | 1486 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
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1487 |
| 241 | 1488 //---- Finish computations once surface is reached ----------- |
| 1489 if( temp_deco <= pres_surface ) | |
| 1490 { | |
| 1491 Surface: | |
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1492 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
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1493 copy_deco_table(); |
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1494 |
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1495 calc_ascenttime(); |
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1496 char_O_deco_status = 0; // calc nullzeit next time. |
| 323 | 1497 char_O_deco_last_stop = 0; // Surface reached (to animate menu) |
| 241 | 1498 return; |
| 1499 } | |
| 1500 } | |
| 212 | 1501 } |
| 1502 else | |
|
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1503 { |
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1504 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1505 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
| 241 | 1506 update_deco_table(); // Just pass one minute. |
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1507 } |
| 197 | 1508 |
| 241 | 1509 //---- Then update tissue -------------------------------------------- |
| 203 | 1510 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1511 gas_switch_set(); // Apply any simulated gas change, once validated. |
| 212 | 1512 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
| 192 | 1513 sim_tissue(1); // Simulate compartiments for 1 minute. |
| 116 | 1514 } |
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1515 |
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1516 // Surface not reached, need more stops... |
| 278 | 1517 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
| 116 | 1518 } |
| 1519 | |
| 167 | 1520 ////////////////////////////////////////////////////////////////////////////// |
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1521 // Simulation ascention to first deco stop. |
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1522 // |
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1523 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1524 // there is no need to break on more that 16 iterations |
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1525 // (or we are already in deep shit). |
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1526 // |
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1527 // Input: pres_respiration |
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1528 // Output: temp_deco |
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1529 // |
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1530 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1531 // before ascent. |
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1532 void sim_ascent_to_first_stop(void) |
| 116 | 1533 { |
| 171 | 1534 update_startvalues(); |
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1535 clear_deco_table(); |
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1536 |
| 200 | 1537 temp_deco = pres_respiration; // Starts from current real depth. |
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1538 |
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1539 // Are we doing the special @+5min variation ? |
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1540 if(char_O_deco_status & 4) |
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1541 sim_extra_time(); |
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1542 |
| 212 | 1543 // Do we have a gas switch going on ? |
| 1544 if( sim_gas_delay > sim_dive_mins ) | |
| 1545 return; | |
| 1546 | |
| 241 | 1547 //---- Loop until first stop, gas switch, or surface is reached ---------- |
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1548 for(;;) |
| 116 | 1549 { |
| 241 | 1550 // Try ascending 1 full minute. |
| 317 | 1551 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. |
| 203 | 1552 |
| 212 | 1553 // Compute sim_lead_tissue_limit at GF_low (deepest stop). |
| 1554 sim_limit(GF_low); | |
| 1555 | |
| 1556 // Did we reach deepest remaining stop ? | |
| 241 | 1557 if( temp_deco < sim_lead_tissue_limit ) |
| 212 | 1558 { |
| 317 | 1559 temp_deco += 10*METER_TO_BAR; // Restore last correct depth, |
| 1560 break; // End fast ascent. | |
| 212 | 1561 } |
| 1562 | |
| 203 | 1563 // Did we reach surface ? |
| 1564 if( temp_deco <= pres_surface ) | |
| 1565 { | |
| 1566 temp_deco = pres_surface; // Yes: finished ! | |
| 1567 break; | |
| 1568 } | |
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1569 |
| 241 | 1570 // Check for gas change below new depth ? |
|
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1571 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
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1572 assert( temp_depth_limit > 0); |
| 241 | 1573 |
| 1574 if( gas_switch_deepest() ) | |
| 1575 { | |
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1576 assert( temp_depth_limit > 0); |
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1577 |
| 317 | 1578 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
| 212 | 1579 break; |
| 241 | 1580 } |
| 171 | 1581 |
| 203 | 1582 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1583 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
| 203 | 1584 sim_tissue(1); // and update tissues for 1 min. |
| 1585 } | |
| 167 | 1586 } |
| 116 | 1587 |
| 167 | 1588 ////////////////////////////////////////////////////////////////////////////// |
|
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1589 // Simulation extra time at the current depth. |
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1590 // |
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1591 // This routine is used for @+5min feature. |
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1592 void sim_extra_time(void) |
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1593 { |
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1594 overlay unsigned char extra = read_custom_function(58); |
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1595 do { |
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1596 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1597 sim_tissue(1); // and update tissues for 1 min. |
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1598 } while( --extra != 0 ); |
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1599 } |
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1600 |
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1601 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 1602 // calc_tissue |
| 1603 // | |
| 116 | 1604 // optimized in v.101 |
| 167 | 1605 // |
| 184 | 1606 static void calc_tissue(PARAMETER unsigned char period) |
| 116 | 1607 { |
| 251 | 1608 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1609 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1610 |
| 338 | 1611 for (ci=0;ci<NUM_COMP;ci++) |
| 126 | 1612 { |
| 258 | 1613 read_buhlmann_times(period); // 2 sec or 1 min period. |
| 116 | 1614 |
| 126 | 1615 // N2 |
| 339 | 1616 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1617 temp_tissue_safety(); |
| 339 | 1618 pres_tissue_N2[ci] += temp_tissue; |
| 165 | 1619 |
| 126 | 1620 // He |
| 339 | 1621 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
| 126 | 1622 temp_tissue_safety(); |
| 339 | 1623 pres_tissue_He[ci] += temp_tissue; |
| 192 | 1624 } |
| 167 | 1625 } |
| 116 | 1626 |
| 167 | 1627 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1628 // calc_limit |
| 167 | 1629 // |
| 192 | 1630 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
| 167 | 1631 // |
| 258 | 1632 static void calc_limit(void) |
| 167 | 1633 { |
| 192 | 1634 char_O_gtissue_no = 255; |
| 1635 calc_lead_tissue_limit = 0.0; | |
| 1636 | |
| 338 | 1637 for(ci=0; ci<NUM_COMP;ci++) |
| 192 | 1638 { |
| 339 | 1639 overlay float N2 = pres_tissue_N2[ci]; |
| 1640 overlay float He = pres_tissue_He[ci]; | |
|
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1641 overlay float p = N2 + He; |
| 192 | 1642 |
| 258 | 1643 read_buhlmann_coefficients(); |
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1644 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1645 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
| 116 | 1646 |
| 192 | 1647 // Apply the Eric Baker's varying gradient factor correction. |
| 1648 // Note: the correction factor depends both on GF and b, | |
| 1649 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1650 // so that can change who is the leading gas... | |
| 1651 // Note: Also depends of the GF. So the calcul is different for | |
| 1652 // GF_low, current GF, or GF_high... | |
| 1653 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1654 // hence what would happend at surface, | |
| 1655 // hence at GF_high. | |
| 1656 if( char_I_deco_model == 1 ) | |
| 258 | 1657 p = ( p - var_N2_a * GF_high) * var_N2_b |
| 1658 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
| 192 | 1659 else |
| 1660 p = (p - var_N2_a) * var_N2_b; | |
| 258 | 1661 if( p < 0.0 ) p = 0.0; |
| 192 | 1662 |
| 1663 if( p > calc_lead_tissue_limit ) | |
| 1664 { | |
| 1665 char_O_gtissue_no = ci; | |
| 1666 calc_lead_tissue_limit = p; | |
| 1667 } | |
| 1668 } | |
| 197 | 1669 |
| 338 | 1670 assert( char_O_gtissue_no < NUM_COMP ); |
| 197 | 1671 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
| 167 | 1672 } |
| 1673 | |
| 1674 ////////////////////////////////////////////////////////////////////////////// | |
| 1675 // calc_nullzeit | |
| 1676 // | |
| 1677 // calculates the remaining bottom time | |
| 1678 // | |
| 1679 // unchanged in v.101 | |
| 1680 // | |
| 1681 static void calc_nullzeit(void) | |
| 1682 { | |
| 203 | 1683 overlay unsigned char loop; |
| 200 | 1684 update_startvalues(); |
| 167 | 1685 |
| 116 | 1686 char_O_nullzeit = 0; |
| 167 | 1687 for(loop = 1; loop <= 17; loop++) |
| 116 | 1688 { |
| 1689 backup_sim_pres_tissue(); | |
| 197 | 1690 sim_tissue(2); // 10 min. |
| 192 | 1691 sim_limit(GF_high); |
| 167 | 1692 |
| 192 | 1693 if( sim_lead_tissue_limit > pres_surface ) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately |
| 185 | 1694 { |
| 1695 restore_sim_pres_tissue(); | |
| 1696 break; | |
| 1697 } | |
| 1698 // Validate once we know its good. | |
| 1699 char_O_nullzeit += 10; | |
| 167 | 1700 } |
| 1701 | |
| 116 | 1702 if (char_O_nullzeit < 60) |
| 1703 { | |
| 167 | 1704 for(loop=1; loop <= 10; loop++) |
| 116 | 1705 { |
| 197 | 1706 sim_tissue(1); // 1 min |
| 192 | 1707 sim_limit(GF_high); |
| 1708 | |
| 1709 if( sim_lead_tissue_limit > pres_surface) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately | |
| 185 | 1710 break; |
| 1711 char_O_nullzeit++; | |
| 167 | 1712 } |
| 185 | 1713 } |
| 1714 } | |
| 116 | 1715 |
| 167 | 1716 ////////////////////////////////////////////////////////////////////////////// |
| 1717 // backup_sim_pres_tissue | |
| 1718 // | |
| 116 | 1719 void backup_sim_pres_tissue(void) |
| 1720 { | |
| 167 | 1721 overlay unsigned char x; |
| 1722 | |
| 339 | 1723 for(x=0; x<NUM_COMP; x++) |
| 1724 { | |
| 1725 sim_pres_tissue_backup_N2[x] = sim_pres_tissue_N2[x]; | |
| 1726 sim_pres_tissue_backup_He[x] = sim_pres_tissue_He[x]; | |
| 1727 } | |
| 167 | 1728 } |
| 116 | 1729 |
| 167 | 1730 ////////////////////////////////////////////////////////////////////////////// |
| 1731 // restore_sim_pres_tissue | |
| 1732 // | |
| 116 | 1733 void restore_sim_pres_tissue(void) |
| 1734 { | |
| 167 | 1735 overlay unsigned char x; |
| 1736 | |
| 339 | 1737 for(x=0; x<NUM_COMP; x++) |
| 1738 { | |
| 1739 sim_pres_tissue_N2[x] = sim_pres_tissue_backup_N2[x]; | |
| 1740 sim_pres_tissue_He[x] = sim_pres_tissue_backup_He[x]; | |
| 1741 } | |
| 167 | 1742 } |
| 116 | 1743 |
| 167 | 1744 ////////////////////////////////////////////////////////////////////////////// |
| 1745 // calc_ascenttime | |
| 1746 // | |
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1747 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1748 // and all stops. |
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1749 // |
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1750 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
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1751 static void calc_ascenttime(void) |
| 116 | 1752 { |
| 323 | 1753 overlay unsigned char x; |
| 1754 overlay unsigned short sum; | |
| 168 | 1755 |
| 323 | 1756 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
| 1757 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
| 1758 if (ascent < 0.0) | |
| 1759 ascent = 0.0; | |
| 1760 sum = (unsigned short)(ascent + 0.99); | |
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1761 |
| 338 | 1762 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
| 323 | 1763 sum += (unsigned short)internal_deco_time[x]; |
| 1764 | |
| 1765 if( char_O_deco_status == 1 ) | |
| 1766 int_O_ascenttime = sum; | |
| 126 | 1767 else |
| 323 | 1768 int_O_extra_ascenttime = sum; |
| 167 | 1769 } |
| 116 | 1770 |
| 167 | 1771 ////////////////////////////////////////////////////////////////////////////// |
| 1772 // update_startvalues | |
| 1773 // | |
| 116 | 1774 // updated in v.102 |
| 167 | 1775 // |
| 116 | 1776 void update_startvalues(void) |
| 1777 { | |
| 167 | 1778 overlay unsigned char x; |
| 116 | 1779 |
| 201 | 1780 // Start ascent simulation with current tissue partial pressures. |
| 339 | 1781 for(x=0; x<NUM_COMP; x++) |
| 116 | 1782 { |
| 339 | 1783 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
| 1784 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
| 116 | 1785 } |
| 197 | 1786 |
| 201 | 1787 // No leading tissue (yet) for this ascent simulation. |
| 197 | 1788 sim_lead_tissue_limit = 0.0; |
| 1789 sim_lead_tissue_no = 255; | |
| 167 | 1790 } |
| 116 | 1791 |
| 167 | 1792 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1793 // sim_tissue |
| 167 | 1794 // |
| 116 | 1795 // optimized in v.101 |
| 167 | 1796 // |
| 1797 // Function very simular to calc_tissue, but: | |
| 1798 // + Use a 1min or 10min period. | |
| 1799 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 184 | 1800 static void sim_tissue(PARAMETER unsigned char period) |
| 116 | 1801 { |
| 251 | 1802 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1803 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1804 |
| 338 | 1805 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1806 { |
| 258 | 1807 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
| 165 | 1808 |
| 126 | 1809 // N2 |
| 339 | 1810 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1811 temp_tissue_safety(); |
| 339 | 1812 sim_pres_tissue_N2[ci] += temp_tissue; |
| 126 | 1813 |
| 1814 // He | |
| 339 | 1815 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
| 126 | 1816 temp_tissue_safety(); |
| 339 | 1817 sim_pres_tissue_He[ci] += temp_tissue; |
| 192 | 1818 } |
| 167 | 1819 } |
| 116 | 1820 |
| 167 | 1821 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1822 // sim_limit() |
| 1823 // | |
| 1824 // New in v.111 | |
| 1825 // | |
| 1826 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1827 // different depth, because it depends on current gradient factor. | |
| 167 | 1828 // |
| 192 | 1829 static void sim_limit(PARAMETER float GF_current) |
| 116 | 1830 { |
| 212 | 1831 assert( 0.0 < GF_current && GF_current <= 1.0f); |
| 1832 | |
| 192 | 1833 sim_lead_tissue_limit = 0.0; |
| 212 | 1834 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
| 192 | 1835 |
| 338 | 1836 for(ci=0; ci<NUM_COMP; ci++) |
| 192 | 1837 { |
| 339 | 1838 overlay float N2 = sim_pres_tissue_N2[ci]; |
| 1839 overlay float He = sim_pres_tissue_He[ci]; | |
| 241 | 1840 overlay float p = N2 + He; |
| 192 | 1841 |
| 258 | 1842 read_buhlmann_coefficients(); |
| 241 | 1843 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
| 1844 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 192 | 1845 |
| 1846 // Apply the Eric Baker's varying gradient factor correction. | |
| 1847 // Note: the correction factor depends both on GF and b, | |
| 1848 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1849 // so that can change who is the leading gas... | |
| 1850 // Note: Also depends of the GF_current... | |
| 1851 if( char_I_deco_model == 1 ) | |
| 302 | 1852 p = ( p - var_N2_a * GF_current) |
| 1853 / (GF_current / var_N2_b + 1.0 - GF_current); | |
| 192 | 1854 else |
| 1855 p = (p - var_N2_a) * var_N2_b; | |
| 237 | 1856 if( p < 0.0 ) p = 0.0; |
| 192 | 1857 |
| 1858 if( p > sim_lead_tissue_limit ) | |
| 1859 { | |
| 1860 sim_lead_tissue_no = ci; | |
| 1861 sim_lead_tissue_limit = p; | |
| 1862 } | |
| 1863 } // for ci | |
| 197 | 1864 |
| 338 | 1865 assert( sim_lead_tissue_no < NUM_COMP ); |
| 237 | 1866 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
| 167 | 1867 } |
| 116 | 1868 |
| 167 | 1869 ////////////////////////////////////////////////////////////////////////////// |
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1870 // clear_deco_table |
| 167 | 1871 // |
| 1872 // unchanged in v.101 | |
| 1873 // | |
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1874 static void clear_deco_table(void) |
| 116 | 1875 { |
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1876 overlay unsigned char x; |
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1877 |
| 338 | 1878 for(x=0; x<NUM_STOPS; ++x) |
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1879 { |
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1880 internal_deco_time [x] = 0; |
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1881 internal_deco_depth[x] = 0; |
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1882 } |
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1883 } |
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1884 |
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1885 ////////////////////////////////////////////////////////////////////////////// |
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1886 // update_deco_table |
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1887 // |
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1888 // Add 1 min to current stop. |
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1889 // |
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1890 // Inputs: |
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1891 // temp_depth_limit = stop's depth, in meters. |
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1892 // In/Out: |
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1893 // internal_deco_depth[] : depth (in metres) of each stops. |
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1894 // internal_deco_time [] : time (in minutes) of each stops. |
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1895 // |
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1896 static void update_deco_table() |
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1897 { |
| 192 | 1898 overlay unsigned char x; |
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1899 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1900 assert( temp_depth_limit > 0 ); // No stop at surface... |
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1901 |
| 338 | 1902 for(x=0; x<NUM_STOPS; ++x) |
| 192 | 1903 { |
| 212 | 1904 // Make sure deco-stops are recorded in order: |
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1905 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
| 212 | 1906 |
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1907 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
| 192 | 1908 { |
| 1909 // Do not overflow (max 255') | |
| 1910 if( internal_deco_time[x] < 255 ) | |
| 1911 { | |
| 1912 internal_deco_time[x]++; | |
| 1913 return; | |
| 1914 } | |
| 1915 // But store extra in the next stop... | |
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1916 } |
| 192 | 1917 |
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1918 if( internal_deco_depth[x] == 0 ) |
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1919 { |
| 192 | 1920 internal_deco_depth[x] = temp_depth_limit; |
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1921 if( sim_gas_delay > sim_dive_mins ) |
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1922 internal_deco_depth[x] |= 0x80; |
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1923 |
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1924 internal_deco_time[x] = 1; |
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1925 return; |
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1926 } |
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1927 } |
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1928 |
| 192 | 1929 // Can't store stops at more than 96m. |
| 1930 // Or stops at less that 3m too. | |
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1931 // Just do nothing with that... |
| 167 | 1932 } |
| 116 | 1933 |
| 167 | 1934 ////////////////////////////////////////////////////////////////////////////// |
| 1935 // calc_gradient_factor | |
| 1936 // | |
| 165 | 1937 // optimized in v.101 (var_N2_a) |
| 116 | 1938 // new code in v.102 |
| 167 | 1939 // |
| 1940 static void calc_gradient_factor(void) | |
| 116 | 1941 { |
| 197 | 1942 overlay float gf; |
| 339 | 1943 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
| 1944 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
| 237 | 1945 |
| 338 | 1946 assert( char_O_gtissue_no < NUM_COMP ); |
| 237 | 1947 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1948 |
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1949 // tissue > respiration (currently off-gasing) |
| 302 | 1950 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
| 1951 // GF = 100% when respiration == limit. | |
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1952 temp_tissue = N2 + He; |
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1953 if( temp_tissue <= pres_respiration ) |
| 197 | 1954 gf = 0.0; |
| 1955 else | |
| 1956 { | |
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1957 overlay float limit = calc_lead_tissue_limit; |
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1958 // NOTE: in GF model, calc_lead_tissue_limit include already the |
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1959 // correction due to gradient factor. To compute the actual |
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1960 // current GF, we need to (re-)compute the raw ambiant-pressure |
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1961 // limit from the Bühlmann model. |
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1962 if( char_I_deco_model == 1 ) |
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1963 { |
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1964 ci = char_O_gtissue_no; |
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1965 read_buhlmann_coefficients(); |
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1966 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1967 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1968 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1969 } |
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1970 |
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1971 gf = (temp_tissue - pres_respiration) |
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1972 / (temp_tissue - limit) |
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1973 * 100.0; |
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1974 if( gf > 254.5 ) gf = 255.0; |
| 197 | 1975 if( gf < 0.0 ) gf = 0.0; |
| 1976 } | |
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1977 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
| 116 | 1978 |
| 1979 if (char_I_deco_model == 1) // calculate relative gradient factor | |
| 1980 { | |
| 197 | 1981 overlay float rgf; |
| 1982 | |
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1983 if( low_depth < 1.5 ) |
| 197 | 1984 rgf = GF_high; |
| 1985 else | |
| 1986 { | |
| 317 | 1987 overlay float temp1 = low_depth * METER_TO_BAR; |
| 197 | 1988 overlay float temp2 = pres_respiration - pres_surface; |
| 186 | 1989 |
| 197 | 1990 if (temp2 <= 0) |
| 1991 rgf = GF_high; | |
| 1992 else if (temp2 >= temp1) | |
| 1993 rgf = GF_low; | |
| 1994 else | |
| 1995 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 1996 } | |
| 186 | 1997 |
| 197 | 1998 rgf = gf / rgf; // gf is already in percent |
| 1999 if( rgf < 0.0 ) rgf = 0.0; | |
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2000 if( rgf > 254.5 ) rgf = 255.0; |
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2001 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
| 116 | 2002 } // calc relative gradient factor |
| 2003 else | |
| 2004 { | |
| 186 | 2005 char_O_relative_gradient_GF = char_O_gradient_factor; |
| 116 | 2006 } |
| 167 | 2007 } |
| 116 | 2008 |
| 167 | 2009 ////////////////////////////////////////////////////////////////////////////// |
| 2010 // deco_calc_desaturation_time | |
| 2011 // | |
| 116 | 2012 // FIXED N2_ratio |
| 2013 // unchanged in v.101 | |
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2014 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
| 233 | 2015 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
| 167 | 2016 // |
| 116 | 2017 void deco_calc_desaturation_time(void) |
| 2018 { | |
| 338 | 2019 overlay rom const float *ptr; |
| 2020 | |
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2021 RESET_C_STACK |
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2022 |
| 233 | 2023 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 2024 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 2025 | |
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2026 #ifndef CROSS_COMPILE |
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2027 // Note: we don't use far rom pointer, because the |
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2028 // 24 bits is to complex, hence we have to set |
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2029 // the UPPER page ourself... |
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2030 // --> Set zero if tables are moved to lower pages ! |
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2031 _asm |
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2032 movlw 1 |
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2033 movwf TBLPTRU,0 |
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2034 _endasm |
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2035 #endif |
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2036 |
| 237 | 2037 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
| 233 | 2038 pres_surface = int_I_pres_surface * 0.001; |
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2039 ppN2 = N2_ratio * (pres_surface - ppWater); |
| 126 | 2040 int_O_desaturation_time = 0; |
| 2041 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) | |
| 233 | 2042 |
| 338 | 2043 ptr = &buhlmann_ht[0]; |
| 339 | 2044 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 2045 { |
| 338 | 2046 overlay float var_N2_halftime = *ptr++; |
| 2047 overlay float var_He_halftime = *ptr++; | |
| 251 | 2048 overlay unsigned short desat_time; // For a particular compartiment, in min. |
| 2049 overlay float temp1; | |
| 2050 overlay float temp2; | |
| 2051 overlay float temp3; | |
| 2052 overlay float temp4; | |
| 338 | 2053 |
| 2054 assert( 4.0 <= var_N2_halftime && var_N2_halftime <= 635.0 ); | |
| 2055 assert( 1.5099 <= var_He_halftime && var_He_halftime <= 240.03 ); | |
| 2056 | |
| 126 | 2057 // saturation_time (for flight) and N2_saturation in multiples of halftime |
| 2058 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 2059 // 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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2060 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
| 126 | 2061 // N2 |
| 339 | 2062 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
| 2063 temp2 = ppN2 - pres_tissue_N2[ci]; | |
| 126 | 2064 if (temp2 >= 0.0) |
| 2065 { | |
| 233 | 2066 temp1 = 0.0; |
| 2067 temp2 = 0.0; | |
| 126 | 2068 } |
| 2069 else | |
| 2070 temp1 = temp1 / temp2; | |
| 251 | 2071 if( 0.0 < temp1 && temp1 < 1.0 ) |
| 126 | 2072 { |
|
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2073 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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2074 // minus because log is negative. |
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2075 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
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2076 temp2 = var_N2_halftime * 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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2077 |
| 126 | 2078 } |
| 2079 else | |
| 2080 { | |
| 233 | 2081 temp1 = 0.0; |
| 2082 temp2 = 0.0; | |
| 126 | 2083 } |
| 116 | 2084 |
| 126 | 2085 // He |
| 339 | 2086 temp3 = 0.1 - pres_tissue_He[ci]; |
| 126 | 2087 if (temp3 >= 0.0) |
| 2088 { | |
| 233 | 2089 temp3 = 0.0; |
| 2090 temp4 = 0.0; | |
| 126 | 2091 } |
| 2092 else | |
| 339 | 2093 temp3 = - temp3 / pres_tissue_He[ci]; |
| 251 | 2094 if( 0.0 < temp3 && temp3 < 1.0 ) |
| 126 | 2095 { |
|
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2096 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
| 126 | 2097 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
| 2098 // minus because log is negative | |
| 165 | 2099 temp4 = var_He_halftime * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
| 126 | 2100 } |
| 2101 else | |
| 2102 { | |
| 233 | 2103 temp3 = 0.0; |
| 2104 temp4 = 0.0; | |
| 126 | 2105 } |
| 116 | 2106 |
| 126 | 2107 // saturation_time (for flight) |
| 2108 if (temp4 > temp2) | |
| 203 | 2109 desat_time = (unsigned short)temp4; |
| 126 | 2110 else |
| 203 | 2111 desat_time = (unsigned short)temp2; |
| 252 | 2112 |
| 251 | 2113 if(desat_time > int_O_desaturation_time) |
| 2114 int_O_desaturation_time = desat_time; | |
| 116 | 2115 |
| 126 | 2116 // N2 saturation in multiples of halftime for display purposes |
| 339 | 2117 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 2118 temp2 = temp2 + 80.0; // set center | |
| 126 | 2119 if (temp2 < 0.0) |
| 2120 temp2 = 0.0; | |
| 2121 if (temp2 > 255.0) | |
| 2122 temp2 = 255.0; | |
| 339 | 2123 char_O_tissue_N2_saturation[ci] = (char)temp2; |
| 233 | 2124 |
| 126 | 2125 // He saturation in multiples of halftime for display purposes |
| 339 | 2126 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 2127 temp4 = temp4 + 80.0; // set center | |
| 126 | 2128 if (temp4 < 0.0) |
| 2129 temp4 = 0.0; | |
| 2130 if (temp4 > 255.0) | |
| 2131 temp4 = 255.0; | |
| 339 | 2132 char_O_tissue_He_saturation[ci] = (char)temp4; |
| 126 | 2133 } // for |
| 167 | 2134 } |
| 116 | 2135 |
| 167 | 2136 ////////////////////////////////////////////////////////////////////////////// |
| 2137 // calc_wo_deco_step_1_min | |
| 2138 // | |
| 116 | 2139 // FIXED N2 Ratio |
| 2140 // optimized in v.101 (...saturation_multiplier) | |
| 2141 // desaturation slowed down to 70,42% | |
| 167 | 2142 // |
| 2143 static void calc_wo_deco_step_1_min(void) | |
| 116 | 2144 { |
| 251 | 2145 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 2146 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
| 2147 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
| 2148 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 2149 | |
| 116 | 2150 if(flag_in_divemode) |
| 2151 { | |
| 2152 flag_in_divemode = 0; | |
| 2153 set_dbg_end_of_dive(); | |
| 2154 } | |
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2155 |
| 126 | 2156 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
| 368 | 2157 pres_respiration = pres_surface = int_I_pres_surface * 0.001; |
| 2158 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 200 | 2159 ppHe = 0.0; |
| 126 | 2160 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) |
| 197 | 2161 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 126 | 2162 |
| 339 | 2163 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
| 167 | 2164 |
|
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2165 clear_deco_table(); |
| 200 | 2166 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
| 126 | 2167 char_O_nullzeit = 0; |
| 168 | 2168 int_O_ascenttime = 0; |
| 323 | 2169 int_O_extra_ascenttime = 0; |
| 126 | 2170 calc_gradient_factor(); |
| 167 | 2171 } |
| 126 | 2172 |
| 167 | 2173 ////////////////////////////////////////////////////////////////////////////// |
| 368 | 2174 // calc_dive_interval |
| 2175 // | |
| 2176 // Prepare tissue for delay before the next dive simulation. | |
| 2177 // | |
| 2178 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
| 2179 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
| 2180 // | |
| 2181 // Should be protected by deco_push_tissues_to_vault(), | |
| 2182 // deco_pull_tissues_from_vault() | |
| 2183 // | |
| 2184 // desaturation slowed down to 70,42%. | |
| 2185 // | |
| 2186 static void calc_dive_interval() | |
| 2187 { | |
| 2188 overlay unsigned char t; | |
| 2189 | |
| 2190 //---- Initialize simulation parameters ---------------------------------- | |
| 2191 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
| 2192 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
| 2193 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 2194 ppHe = 0.0; | |
| 2195 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) | |
| 2196 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 2197 | |
| 2198 //---- Perform simulation ------------------------------------------------ | |
| 2199 for(t=0; t<char_I_dive_interval; ++t) | |
| 2200 { | |
| 2201 calc_tissue(2); // period = 10min. | |
| 2202 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
| 2203 } | |
| 2204 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); | |
| 2205 } | |
| 2206 | |
| 2207 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 2208 ////////////////////////////////////////////////////////////////////////////// |
| 2209 ////////////////////////////////// deco_hash ///////////////////////////////// | |
| 2210 ////////////////////////////////////////////////////////////////////////////// | |
| 2211 ////////////////////////////////////////////////////////////////////////////// | |
| 126 | 2212 |
| 184 | 2213 #ifndef CROSS_COMPILE |
| 116 | 2214 void deco_hash(void) |
| 2215 { | |
| 167 | 2216 overlay unsigned char md_i, md_j; // Loop index. |
| 2217 overlay unsigned char md_t; | |
| 2218 overlay unsigned char md_buffer[16]; | |
| 2219 overlay unsigned char md_temp; | |
| 203 | 2220 overlay unsigned short md_pointer; |
| 167 | 2221 |
|
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2222 RESET_C_STACK |
| 126 | 2223 |
| 2224 // init | |
| 164 | 2225 for(md_i=0;md_i<16;md_i++) |
| 126 | 2226 { |
| 2227 md_state[md_i] = 0; | |
| 164 | 2228 char_O_hash[md_i] = 0; |
| 126 | 2229 } // for md_i 16 |
| 116 | 2230 |
| 126 | 2231 _asm |
| 167 | 2232 movlw 0x01 // md_pi address. |
| 2233 movwf TBLPTRU,0 | |
| 2234 movlw 0x7E | |
| 2235 movwf TBLPTRH,0 | |
| 2236 movlw 0x00 | |
| 2237 movwf TBLPTRL,0 | |
| 126 | 2238 _endasm; |
| 165 | 2239 md_i = 0; |
| 2240 do { | |
| 126 | 2241 _asm |
| 2242 TBLRDPOSTINC | |
| 2243 movff TABLAT,md_temp | |
| 2244 _endasm | |
| 165 | 2245 md_pi_subst[md_i++] = md_temp; |
| 2246 } while( md_i != 0 ); | |
| 2247 | |
| 126 | 2248 _asm |
| 167 | 2249 movlw 0x00 |
| 2250 movwf TBLPTRU,0 | |
| 2251 movlw 0x00 | |
| 2252 movwf TBLPTRH,0 | |
| 2253 movlw 0x00 | |
| 2254 movwf TBLPTRL,0 | |
| 126 | 2255 _endasm |
| 167 | 2256 |
| 126 | 2257 // cycle buffers |
| 2258 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
| 2259 { | |
| 2260 md_t = 0; | |
| 2261 for (md_i=0;md_i<16;md_i++) | |
| 2262 { | |
| 2263 if(md_pointer == 9) | |
| 164 | 2264 md_temp = char_O_hash[md_i]; |
| 126 | 2265 else |
| 2266 { | |
| 2267 _asm | |
| 167 | 2268 TBLRDPOSTINC |
| 2269 movff TABLAT,md_temp | |
| 126 | 2270 _endasm |
| 2271 } // else | |
| 167 | 2272 |
| 2273 md_buffer[md_i] = md_temp; | |
| 186 | 2274 md_state[md_i+16] = md_temp; |
| 2275 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
| 126 | 2276 } // for md_i 16 |
| 2277 | |
| 2278 for (md_i=0;md_i<18;md_i++) | |
| 2279 { | |
| 2280 for (md_j=0;md_j<48;md_j++) | |
| 2281 { | |
| 167 | 2282 md_state[md_j] ^= md_pi_subst[md_t]; |
| 126 | 2283 md_t = md_state[md_j]; |
| 2284 } // for md_j 48 | |
| 2285 md_t = (unsigned char)(md_t+1); | |
| 2286 } // for md_i 18 | |
| 164 | 2287 md_t = char_O_hash[15]; |
| 126 | 2288 |
| 2289 for (md_i=0;md_i<16;md_i++) | |
| 2290 { | |
| 167 | 2291 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
| 164 | 2292 md_t = char_O_hash[md_i]; |
| 126 | 2293 } // for md_i 16 |
| 2294 } // for md_pointer | |
| 116 | 2295 } // void deco_hash(void) |
| 184 | 2296 #endif |
| 116 | 2297 |
| 167 | 2298 ////////////////////////////////////////////////////////////////////////////// |
| 2299 // deco_clear_CNS_fraction | |
| 2300 // | |
| 116 | 2301 // new in v.101 |
| 167 | 2302 // |
| 116 | 2303 void deco_clear_CNS_fraction(void) |
| 2304 { | |
|
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2305 RESET_C_STACK |
| 237 | 2306 |
| 126 | 2307 CNS_fraction = 0.0; |
| 2308 char_O_CNS_fraction = 0; | |
| 167 | 2309 } |
| 116 | 2310 |
| 167 | 2311 ////////////////////////////////////////////////////////////////////////////// |
| 2312 // deco_calc_CNS_fraction | |
| 2313 // | |
| 116 | 2314 // new in v.101 |
| 2315 // optimized in v.102 : with new variables char_I_actual_ppO2 and actual_ppO2 | |
| 167 | 2316 // |
| 116 | 2317 // Input: char_I_actual_ppO2 |
| 292 | 2318 // char_I_step_is_1min : use 1min steps instead of 2sec. |
| 116 | 2319 // Output: char_O_CNS_fraction |
| 2320 // Uses and Updates: CNS_fraction | |
| 2321 // Uses: acutal_ppO2 | |
| 167 | 2322 // |
| 116 | 2323 void deco_calc_CNS_fraction(void) |
| 2324 { | |
| 167 | 2325 overlay float actual_ppO2; |
| 292 | 2326 overlay float time_factor = 1.0f; |
| 126 | 2327 RESET_C_STACK |
| 167 | 2328 |
| 237 | 2329 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.5 ); |
| 2330 assert( char_I_actual_ppO2 > 15 ); | |
| 2331 | |
| 126 | 2332 actual_ppO2 = (float)char_I_actual_ppO2 / 100.0; |
| 292 | 2333 if( char_I_step_is_1min ) |
| 2334 time_factor = 30.0f; | |
| 116 | 2335 |
| 126 | 2336 if (char_I_actual_ppO2 < 50) |
| 292 | 2337 ; // no changes |
| 126 | 2338 else if (char_I_actual_ppO2 < 60) |
| 292 | 2339 CNS_fraction += time_factor/(-54000.0 * actual_ppO2 + 54000.0); |
| 126 | 2340 else if (char_I_actual_ppO2 < 70) |
| 292 | 2341 CNS_fraction += time_factor/(-45000.0 * actual_ppO2 + 48600.0); |
| 126 | 2342 else if (char_I_actual_ppO2 < 80) |
| 292 | 2343 CNS_fraction += time_factor/(-36000.0 * actual_ppO2 + 42300.0); |
| 126 | 2344 else if (char_I_actual_ppO2 < 90) |
| 292 | 2345 CNS_fraction += time_factor/(-27000.0 * actual_ppO2 + 35100.0); |
| 126 | 2346 else if (char_I_actual_ppO2 < 110) |
| 292 | 2347 CNS_fraction += time_factor/(-18000.0 * actual_ppO2 + 27000.0); |
| 126 | 2348 else if (char_I_actual_ppO2 < 150) |
| 292 | 2349 CNS_fraction += time_factor/(-9000.0 * actual_ppO2 + 17100.0); |
| 126 | 2350 else if (char_I_actual_ppO2 < 160) |
| 292 | 2351 CNS_fraction += time_factor/(-22500.0 * actual_ppO2 + 37350.0); |
| 126 | 2352 else if (char_I_actual_ppO2 < 165) |
| 292 | 2353 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 | 2354 else if (char_I_actual_ppO2 < 170) |
| 292 | 2355 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
| 126 | 2356 else if (char_I_actual_ppO2 < 175) |
| 292 | 2357 CNS_fraction += time_factor*0.00136; |
| 126 | 2358 else if (char_I_actual_ppO2 < 180) |
| 292 | 2359 CNS_fraction += time_factor*0.00180; |
| 126 | 2360 else if (char_I_actual_ppO2 < 185) |
| 292 | 2361 CNS_fraction += time_factor*0.00237; |
| 126 | 2362 else if (char_I_actual_ppO2 < 190) |
| 292 | 2363 CNS_fraction += time_factor*0.00310; |
| 126 | 2364 else if (char_I_actual_ppO2 < 195) |
| 292 | 2365 CNS_fraction += time_factor*0.00401; |
| 126 | 2366 else if (char_I_actual_ppO2 < 200) |
| 292 | 2367 CNS_fraction += time_factor*0.00517; |
| 126 | 2368 else if (char_I_actual_ppO2 < 230) |
| 292 | 2369 CNS_fraction += time_factor*0.0209; |
| 126 | 2370 else |
| 292 | 2371 CNS_fraction += time_factor*0.0482; // value for 2.5 |
| 116 | 2372 |
| 126 | 2373 if (CNS_fraction > 2.5) |
| 2374 CNS_fraction = 2.5; | |
| 2375 if (CNS_fraction < 0.0) | |
| 2376 CNS_fraction = 0.0; | |
| 2377 | |
| 2378 char_O_CNS_fraction = (char)((CNS_fraction + 0.005)* 100.0); | |
| 167 | 2379 } |
| 116 | 2380 |
| 167 | 2381 ////////////////////////////////////////////////////////////////////////////// |
| 2382 // deco_calc_CNS_decrease_15min | |
| 2383 // | |
| 116 | 2384 // new in v.101 |
| 167 | 2385 // |
| 116 | 2386 // calculates the half time of 90 minutes in 6 steps of 15 min |
| 200 | 2387 // (Used in sleepmode, for low battery mode). |
| 167 | 2388 // |
| 116 | 2389 // Output: char_O_CNS_fraction |
| 2390 // Uses and Updates: CNS_fraction | |
| 167 | 2391 // |
| 116 | 2392 void deco_calc_CNS_decrease_15min(void) |
| 2393 { | |
| 237 | 2394 RESET_C_STACK |
| 2395 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.5 ); | |
| 2396 | |
| 126 | 2397 CNS_fraction = 0.890899 * CNS_fraction; |
| 167 | 2398 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); |
| 2399 } | |
| 116 | 2400 |
| 167 | 2401 ////////////////////////////////////////////////////////////////////////////// |
| 2402 // deco_calc_percentage | |
| 2403 // | |
| 116 | 2404 // new in v.101 |
| 167 | 2405 // |
| 116 | 2406 // calculates int_I_temp * char_I_temp / 100 |
| 2407 // output is int_I_temp | |
| 200 | 2408 // |
| 2409 // Used to compute NoFly remaining time. | |
|
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2410 // |
| 116 | 2411 void deco_calc_percentage(void) |
| 2412 { | |
|
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2413 RESET_C_STACK |
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2414 |
| 237 | 2415 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
| 2416 assert( 0 <= int_I_temp && int_I_temp < 2880 ); // Less than 48h... | |
| 2417 | |
|
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2418 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
| 237 | 2419 |
| 302 | 2420 assert( int_I_temp < 2880 ); // Less than 48h... |
|
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2421 } |
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2422 |
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2423 |
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2424 ////////////////////////////////////////////////////////////////////////////// |
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2425 // deco_gas_volumes |
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2426 // |
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2427 // new in v.111 |
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2428 // |
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2429 // calculates volumes for each gas. |
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2430 // |
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2431 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
|
240
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2432 // Gas list. |
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2433 // char_I_first_gas is the bottom gas. |
|
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2434 // decoplan (char_O_deco_depth, char_O_deco_time). |
|
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2435 // CF#54 == TRUE if shallowest stop first. |
|
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2436 // CF#56 == bottom deci-liters/minutes (0.5 .. 50.0) or bar/min. |
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2437 // CF#57 == deco deci-liters/minutes (0.5 .. 50.0) or bar/min. |
| 224 | 2438 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
|
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2439 // |
|
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2440 void deco_gas_volumes(void) |
|
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2441 { |
| 338 | 2442 overlay float volumes[NUM_GAS]; |
| 265 | 2443 overlay float bottom_usage, ascent_usage; |
|
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2444 overlay unsigned char i, deepest_first; |
| 241 | 2445 overlay unsigned char gas; |
|
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2446 RESET_C_STACK |
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2447 |
|
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2448 //---- initialize with bottom consumption -------------------------------- |
| 338 | 2449 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
|
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2450 volumes[i] = 0.0; |
|
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2451 |
| 338 | 2452 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
| 241 | 2453 gas = char_I_first_gas - 1; |
| 2454 | |
| 265 | 2455 bottom_usage = read_custom_function(56) * 0.1; |
| 2456 if( bottom_usage > 0.0 ) | |
| 2457 volumes[gas] | |
| 2458 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
| 2459 * char_I_bottom_time // in minutes. | |
| 2460 * bottom_usage; // In liter/minutes. | |
| 2461 else | |
| 2462 volumes[gas] = 65535.0; | |
|
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2463 |
|
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2464 //---- Ascent usage ------------------------------------------------------ |
|
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2465 |
|
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2466 deepest_first = read_custom_function(54) == 0; |
|
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2467 ascent_usage = read_custom_function(57) * 0.1; // In liter/minutes. |
|
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2468 |
| 224 | 2469 // Usage up to the first stop: |
| 2470 // - computed at MAX depth (easier, safer), | |
|
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2471 // - with an ascent speed of 10m/min. |
| 224 | 2472 // - with ascent litter / minutes. |
|
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2473 // - still using bottom gas: |
| 265 | 2474 if( ascent_usage > 0.0 ) |
| 2475 volumes[gas] | |
| 2476 += (char_I_bottom_depth*0.1 + 1.0) // Depth -> bar | |
| 2477 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 // ascent time (min) | |
| 2478 * ascent_usage; // Consumption ( xxx / min @ 1 bar) | |
| 2479 else | |
| 2480 volumes[gas] = 65535.0; | |
|
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2481 |
| 338 | 2482 for(i=0; i<NUM_STOPS; ++i) |
|
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2483 { |
| 241 | 2484 overlay unsigned char j; |
|
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2485 overlay unsigned char depth, time, ascent; |
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2486 |
|
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2487 // Manage stops in reverse order (CF#54) |
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2488 if( deepest_first ) |
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2489 { |
| 241 | 2490 time = char_O_deco_time[i]; |
|
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2491 if( time == 0 ) break; // End of table: done. |
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2492 |
|
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2493 ascent = depth = char_O_deco_depth[i] & 0x7F; |
|
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2494 if( i < 31 ) |
|
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2495 ascent -= char_O_deco_depth[i+1] & 0x7F; |
|
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2496 } |
|
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2497 else |
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2498 { |
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2499 time = char_O_deco_time[31-i]; |
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2500 if( time == 0 ) continue; // not yet: still searh table. |
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2501 |
|
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2502 ascent = depth = char_O_deco_depth[31-i] & 0x7F; |
|
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2503 if( i < 31 ) |
|
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2504 ascent -= char_O_deco_depth[30-i] & 0x7F; |
|
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2505 } |
|
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2506 |
|
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2507 // Gas switch depth ? |
| 338 | 2508 for(j=0; j<NUM_GAS; ++j) |
|
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2509 { |
|
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2510 if( depth <= char_I_deco_gas_change[j] ) |
| 241 | 2511 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
| 224 | 2512 gas = j; |
|
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2513 } |
|
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2514 |
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2515 // usage during stop: |
| 224 | 2516 // Note: because first gas is not in there, increment gas+1 |
| 265 | 2517 if( ascent_usage > 0.0 ) |
| 2518 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. | |
| 2519 * time // in minutes. | |
| 2520 * ascent_usage // in xxx / min @ 1bar. | |
| 2521 // Plus usage during ascent to the next stop, at 10m/min. | |
| 2522 + (depth*0.1 + 1.0) | |
|
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2523 * ascent*0.1 // metre --> min |
| 265 | 2524 * ascent_usage; |
| 2525 else | |
| 2526 volumes[gas] = 65535.0; | |
|
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2527 } |
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2528 |
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2529 //---- convert results for the ASM interface ----------------------------- |
| 338 | 2530 for(i=0; i<NUM_GAS; ++i) |
| 224 | 2531 if( volumes[i] > 6553.4 ) |
| 2532 int_O_gas_volumes[i] = 65535; | |
|
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2533 else |
| 224 | 2534 int_O_gas_volumes[i] = (unsigned short)(volumes[i]*10.0 + 0.5); |
| 116 | 2535 } |
| 2536 | |
| 167 | 2537 ////////////////////////////////////////////////////////////////////////////// |
| 2538 | |
| 116 | 2539 void deco_push_tissues_to_vault(void) |
| 2540 { | |
| 167 | 2541 overlay unsigned char x; |
|
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2542 RESET_C_STACK |
| 167 | 2543 |
| 116 | 2544 cns_vault = CNS_fraction; |
| 339 | 2545 for (x=0;x<NUM_COMP;x++) |
| 2546 { | |
| 2547 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
| 2548 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
| 2549 } | |
| 116 | 2550 } |
| 167 | 2551 |
| 116 | 2552 void deco_pull_tissues_from_vault(void) |
| 2553 { | |
| 167 | 2554 overlay unsigned char x; |
|
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2555 RESET_C_STACK |
| 167 | 2556 |
| 339 | 2557 for (x=0; x<NUM_COMP; x++) |
| 2558 { | |
| 2559 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
| 2560 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
| 2561 } | |
| 292 | 2562 |
| 2563 // Restore both CNS variable, too. | |
| 2564 CNS_fraction = cns_vault; | |
| 2565 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); | |
| 116 | 2566 } |
| 2567 | |
| 167 | 2568 ////////////////////////////////////////////////////////////////////////////// |
| 2569 // | |
| 184 | 2570 #ifndef CROSS_COMPILE |
| 2571 void main() {} | |
| 2572 #endif |