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annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 366:ca3d15e6240e 64kByte Logbook
small work in the logbook
| author | Heinrichsweikamp |
|---|---|
| date | Thu, 09 Jun 2011 19:30:55 +0200 |
| parents | b5b030c1ae7e |
| children | de3b267e1fd9 |
| 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); | |
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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); |
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134 |
| 167 | 135 static void calc_gradient_factor(void); |
| 136 static void calc_wo_deco_step_1_min(void); | |
| 137 | |
| 138 static void calc_hauptroutine_data_input(void); | |
| 139 static void calc_hauptroutine_update_tissues(void); | |
| 140 static void calc_hauptroutine_calc_deco(void); | |
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141 static void sim_ascent_to_first_stop(void); |
| 167 | 142 |
| 241 | 143 static unsigned char gas_switch_deepest(void); |
| 144 static void gas_switch_set(void); | |
| 217 | 145 |
| 241 | 146 static unsigned char calc_nextdecodepth(void); |
| 116 | 147 |
| 200 | 148 //---- Bank 4 parameters ----------------------------------------------------- |
| 163 | 149 #pragma udata bank4=0x400 |
| 116 | 150 |
| 151 static float temp_limit; | |
| 152 static float GF_low; | |
| 153 static float GF_high; | |
| 154 static float GF_delta; | |
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155 static float low_depth; // Depth of deepest stop |
| 192 | 156 static float locked_GF_step; // GF_delta / low_depth |
| 157 | |
| 158 static unsigned char temp_depth_limit; | |
| 171 | 159 |
| 192 | 160 // Simulation context: used to predict ascent. |
| 161 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 162 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 116 | 163 |
| 192 | 164 // Real context: what we are doing now. |
| 165 static float calc_lead_tissue_limit; // | |
| 116 | 166 |
| 338 | 167 static unsigned char internal_deco_time[NUM_STOPS]; |
| 168 static unsigned char internal_deco_depth[NUM_STOPS]; | |
| 116 | 169 |
| 170 static float cns_vault; | |
| 339 | 171 static float pres_tissue_N2_vault[NUM_COMP]; |
| 172 static float pres_tissue_He_vault[NUM_COMP]; | |
| 116 | 173 |
| 163 | 174 //---- Bank 5 parameters ----------------------------------------------------- |
| 175 #pragma udata bank5=0x500 | |
| 176 | |
| 167 | 177 static unsigned char ci; |
| 116 | 178 static float pres_respiration; |
| 179 static float pres_surface; | |
| 180 static float temp_deco; | |
| 236 | 181 static float ppN2; |
| 200 | 182 static float ppHe; |
| 116 | 183 static float temp_tissue; |
| 200 | 184 static float N2_ratio; // Breathed gas nitrogen ratio. |
| 185 static float He_ratio; // Breathed gas helium ratio. | |
| 186 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
| 187 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
| 188 static float var_He_a; // Bühlmann a, for current He tissue. | |
| 189 static float var_He_b; // Bühlmann b, for current He tissue. | |
| 190 static float var_N2_e; // Exposition, for current N2 tissue. | |
| 191 static float var_He_e; // Exposition, for current He tissue. | |
| 116 | 192 |
| 338 | 193 static float pres_diluent; // new in v.101 |
| 194 static float const_ppO2; // new in v.101 | |
| 116 | 195 |
| 241 | 196 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
| 197 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
| 203 | 198 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
| 199 static unsigned short sim_dive_mins; // Simulated dive time. | |
| 200 | 200 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
| 201 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
| 202 static float CNS_fraction; // new in v.101 | |
| 203 static float float_saturation_multiplier; // new in v.101 | |
| 204 static float float_desaturation_multiplier; // new in v.101 | |
| 338 | 205 static float float_deco_distance; // new in v.101 |
| 206 static char flag_in_divemode; // new in v.108 | |
| 167 | 207 |
| 338 | 208 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
| 167 | 209 |
| 163 | 210 //---- Bank 6 parameters ----------------------------------------------------- |
| 211 #pragma udata bank6=0x600 | |
| 116 | 212 |
| 339 | 213 float pres_tissue_N2[NUM_COMP]; |
| 214 float pres_tissue_He[NUM_COMP]; | |
| 116 | 215 |
| 163 | 216 //---- Bank 7 parameters ----------------------------------------------------- |
| 217 #pragma udata bank7=0x700 | |
| 218 | |
| 339 | 219 float sim_pres_tissue_N2[NUM_COMP]; // 32 floats = 128 bytes. |
| 220 float sim_pres_tissue_He[NUM_COMP]; // 32 floats = 128 bytes. | |
| 221 static float sim_pres_tissue_backup_N2[NUM_COMP]; | |
| 222 static float sim_pres_tissue_backup_He[NUM_COMP]; | |
| 116 | 223 |
| 163 | 224 //---- Bank 8 parameters ----------------------------------------------------- |
| 116 | 225 #pragma udata bank8=0x800 |
| 163 | 226 |
| 116 | 227 static char md_pi_subst[256]; |
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228 #define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
| 116 | 229 |
| 163 | 230 //---- Bank 9 parameters ----------------------------------------------------- |
| 167 | 231 #pragma udata bank9=0x900 |
| 116 | 232 |
| 163 | 233 static char md_state[48]; // DONT MOVE !! // has to be at the beginning of bank 9 for the asm code!!! |
| 116 | 234 |
| 164 | 235 // internal, dbg: |
| 167 | 236 static unsigned char DBG_char_I_deco_model; // new in v.108. |
| 164 | 237 static unsigned char DBG_char_I_depth_last_deco; // new in v.108 |
| 212 | 238 static unsigned char DBG_deco_gas_change; // new in v.108 |
| 224 | 239 static unsigned char DBG_deco_N2_ratio; // new in v.108 |
| 240 static unsigned char DBG_deco_He_ratio; // new in v.108 | |
| 164 | 241 static float DBG_pres_surface; // new in v.108 |
| 242 static float DBG_GF_low; // new in v.108 | |
| 243 static float DBG_GF_high; // new in v.108 | |
| 244 static float DBG_const_ppO2; // new in v.108 | |
| 245 static float DBG_float_saturation_multiplier; // new in v.108 | |
| 246 static float DBG_float_desaturation_multiplier; // new in v.108 | |
| 247 static float DBG_float_deco_distance; // new in v.108 | |
| 248 static float DBG_N2_ratio; // new in v.108 | |
| 249 static float DBG_He_ratio; // new in v.108 | |
| 250 | |
| 167 | 251 ////////////////////////////////////////////////////////////////////////////// |
| 252 ////////////////////////////////////////////////////////////////////////////// | |
| 253 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 254 ////////////////////////////////////////////////////////////////////////////// | |
| 255 ////////////////////////////////////////////////////////////////////////////// | |
| 256 // | |
| 257 // End of PROM code is 17F00, So push tables on PROM top... | |
| 258 // | |
| 259 #pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. | |
| 260 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) | |
| 116 | 261 |
| 167 | 262 // Magic table to compute the MD2 HASH |
| 263 // | |
| 264 #pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... | |
| 203 | 265 rom const rom unsigned short md_pi[] = |
| 116 | 266 { |
| 267 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 | |
| 268 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA | |
| 269 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 | |
| 270 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A | |
| 271 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 | |
| 272 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 | |
| 273 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 | |
| 274 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 | |
| 275 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 | |
| 276 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F | |
| 277 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 | |
| 278 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 | |
| 279 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A | |
| 280 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 | |
| 281 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A | |
| 282 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 | |
| 283 }; | |
| 284 | |
| 167 | 285 ////////////////////////////////////////////////////////////////////////////// |
| 286 ////////////////////////////////////////////////////////////////////////////// | |
| 287 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 288 ////////////////////////////////////////////////////////////////////////////// | |
| 289 ////////////////////////////////////////////////////////////////////////////// | |
| 290 // | |
| 116 | 291 // all new in v.102 |
| 292 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 293 | |
| 294 #pragma code p2_deco = 0x0C000 | |
| 295 | |
| 167 | 296 ////////////////////////////////////////////////////////////////////////////// |
| 297 // DBS - debug on start of dive | |
| 298 // | |
| 299 static void create_dbs_set_dbg_and_ndl20mtr(void) | |
| 116 | 300 { |
| 167 | 301 overlay char i; // Local loop index. |
| 302 | |
| 303 //---- Reset DEBUG bit fields -------------------------------------------- | |
| 116 | 304 int_O_DBS_bitfield = 0; |
| 305 int_O_DBS2_bitfield = 0; | |
| 306 if(int_O_DBG_pre_bitfield & DBG_RUN) | |
| 307 int_O_DBG_pre_bitfield = DBG_RESTART; | |
| 308 else | |
| 309 int_O_DBG_pre_bitfield = DBG_RUN; | |
| 310 int_O_DBG_post_bitfield = 0; | |
| 167 | 311 |
| 312 //---- Set 20meters ND limit --------------------------------------------- | |
| 116 | 313 char_O_NDL_at_20mtr = 255; |
| 314 | |
| 167 | 315 //---- Copy all dive parameters ------------------------------------------ |
| 116 | 316 DBG_N2_ratio = N2_ratio; |
| 317 DBG_He_ratio = He_ratio; | |
| 318 DBG_char_I_deco_model = char_I_deco_model; | |
| 319 DBG_char_I_depth_last_deco = char_I_depth_last_deco; | |
| 320 DBG_pres_surface = pres_surface; | |
| 321 DBG_GF_low = GF_low; | |
| 322 DBG_GF_high = GF_high; | |
| 323 DBG_const_ppO2 = const_ppO2; | |
| 224 | 324 DBG_deco_N2_ratio = char_I_deco_N2_ratio[0]; |
| 325 DBG_deco_He_ratio = char_I_deco_He_ratio[0]; | |
| 225 | 326 DBG_deco_gas_change = deco_gas_change[0]; |
| 116 | 327 DBG_float_saturation_multiplier = float_saturation_multiplier; |
| 328 DBG_float_desaturation_multiplier = float_desaturation_multiplier; | |
| 329 DBG_float_deco_distance = float_deco_distance; | |
| 330 | |
| 167 | 331 //---- Setup some error (?) conditions ----------------------------------- |
| 116 | 332 if(char_I_deco_model) |
| 333 int_O_DBS_bitfield |= DBS_mode; | |
| 334 if(const_ppO2) | |
| 335 int_O_DBS_bitfield |= DBS_ppO2; | |
| 339 | 336 for(i = 0; i < NUM_COMP; i++) |
| 337 if(pres_tissue_He[i]) | |
| 116 | 338 int_O_DBS_bitfield |= DBS_HE_sat; |
| 339 if(float_saturation_multiplier < 0.99) | |
| 340 int_O_DBS_bitfield |= DBS_SAT2l; | |
| 341 if(float_saturation_multiplier > 1.3) | |
| 342 int_O_DBS_bitfield |= DBS_SAT2h; | |
| 343 if(GF_low < 0.19) | |
| 344 int_O_DBS_bitfield |= DBS_GFLOW2l; | |
| 345 if(GF_low > 1.01) | |
| 346 int_O_DBS_bitfield |= DBS_GFLOW2h; | |
| 347 if(GF_high < 0.6) | |
| 348 int_O_DBS_bitfield |= DBS_GFHGH2l; | |
| 349 if(GF_high > 1.01) | |
| 350 int_O_DBS_bitfield |= DBS_GFHGH2h; | |
| 351 if((N2_ratio + He_ratio) > 0.95) | |
| 352 int_O_DBS_bitfield |= DBS_GASO22l; | |
| 353 if((N2_ratio + He_ratio) < 0.05) | |
| 354 int_O_DBS_bitfield |= DBS_GASO22h; | |
| 355 if(float_deco_distance > 0.25) | |
| 356 int_O_DBS_bitfield |= DBS_DIST2h; | |
| 357 if(char_I_depth_last_deco > 8) | |
| 358 int_O_DBS_bitfield |= DBS_LAST2h; | |
| 224 | 359 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) > 95)) |
| 116 | 360 int_O_DBS_bitfield |= DBS_DECOO2l; |
| 224 | 361 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) < 5)) |
| 116 | 362 int_O_DBS_bitfield |= DBS_DECOO2h; |
| 363 if(pres_respiration > 3.0) | |
| 364 int_O_DBS2_bitfield |= DBS2_PRES2h; | |
| 365 if(pres_surface - pres_respiration > 0.2) | |
| 366 int_O_DBS2_bitfield |= DBS2_PRES2l; | |
| 367 if(pres_surface < 0.75) | |
| 368 int_O_DBS2_bitfield |= DBS2_SURF2l; | |
| 369 if(pres_surface > 1.11) | |
| 370 int_O_DBS2_bitfield |= DBS2_SURF2h; | |
| 371 if(float_desaturation_multiplier < 0.70) | |
| 372 int_O_DBS2_bitfield |= DBS2_DESAT2l; | |
| 373 if(float_desaturation_multiplier > 1.01) | |
| 374 int_O_DBS2_bitfield |= DBS2_DESAT2h; | |
| 375 if(GF_low > GF_high) | |
| 376 int_O_DBS2_bitfield |= DBS2_GFDneg; | |
| 377 } | |
| 378 | |
| 167 | 379 ////////////////////////////////////////////////////////////////////////////// |
| 380 // DBG - set DBG to end_of_dive | |
| 381 // | |
| 382 static void set_dbg_end_of_dive(void) | |
| 116 | 383 { |
| 384 int_O_DBG_pre_bitfield &= (~DBG_RUN); | |
| 385 int_O_DBG_post_bitfield &= (~DBG_RUN); | |
| 386 } | |
| 387 | |
| 167 | 388 ////////////////////////////////////////////////////////////////////////////// |
| 389 // DBG - NDL at first 20 m. hit | |
| 390 // | |
| 391 static void check_ndl(void) | |
| 116 | 392 { |
| 167 | 393 if( char_O_NDL_at_20mtr == 255 // Still in NDL mode ? |
| 394 && int_I_pres_respiration > 3000 // And we hit the 20m limit ? | |
| 395 ) | |
| 116 | 396 { |
| 167 | 397 char_O_NDL_at_20mtr = char_O_nullzeit; // change to max bottom time. |
| 398 if( char_O_NDL_at_20mtr == 255) // and avoid confusion. | |
| 184 | 399 char_O_NDL_at_20mtr = 254; |
| 116 | 400 } |
| 401 } | |
| 402 | |
| 167 | 403 ////////////////////////////////////////////////////////////////////////////// |
| 404 // DBG - multi main during dive | |
| 405 // | |
| 184 | 406 static void check_dbg(PARAMETER char is_post_check) |
| 116 | 407 { |
| 203 | 408 overlay unsigned short temp_DBS = 0; |
| 200 | 409 overlay unsigned char i; // Local loop index. |
| 167 | 410 |
| 116 | 411 if( (DBG_N2_ratio != N2_ratio) || (DBG_He_ratio != He_ratio) ) |
| 412 temp_DBS |= DBG_c_gas; | |
| 413 if(DBG_const_ppO2 != const_ppO2) | |
| 414 temp_DBS |= DBG_c_ppO2; | |
| 167 | 415 if( DBG_float_saturation_multiplier != float_saturation_multiplier |
| 416 || DBG_float_desaturation_multiplier != float_desaturation_multiplier | |
| 417 ) | |
| 116 | 418 temp_DBS |= DBG_CdeSAT; |
| 419 if(DBG_char_I_deco_model != char_I_deco_model) | |
| 420 temp_DBS |= DBG_C_MODE; | |
| 421 if(DBG_pres_surface != pres_surface) | |
| 422 temp_DBS |= DBG_C_SURF; | |
| 167 | 423 |
| 424 if( !DBS_HE_sat && !He_ratio) | |
| 339 | 425 for(i = 0; i < NUM_COMP; i++) |
| 426 if(pres_tissue_He[i]) | |
| 116 | 427 temp_DBS |= DBG_HEwoHE; |
| 167 | 428 |
| 225 | 429 if( DBG_deco_gas_change != deco_gas_change[0] |
| 224 | 430 || DBG_deco_N2_ratio != char_I_deco_N2_ratio[0] |
| 431 || DBG_deco_He_ratio != char_I_deco_He_ratio[0] ) | |
| 116 | 432 temp_DBS |= DBG_C_DGAS; |
| 167 | 433 |
| 116 | 434 if(DBG_float_deco_distance != float_deco_distance) |
| 435 temp_DBS |= DBG_C_DIST; | |
| 436 if(DBG_char_I_depth_last_deco != char_I_depth_last_deco) | |
| 437 temp_DBS |= DBG_C_LAST; | |
| 167 | 438 if( DBG_GF_low != GF_low |
| 439 || DBG_GF_high != GF_high ) | |
| 116 | 440 temp_DBS |= DBG_C_GF; |
| 441 if(pres_respiration > 13.0) | |
| 442 temp_DBS |= DBG_PHIGH; | |
| 443 if(pres_surface - pres_respiration > 0.2) | |
| 444 temp_DBS |= DBG_PLOW; | |
| 445 if(is_post_check) | |
| 446 int_O_DBG_post_bitfield |= temp_DBS; | |
| 447 else | |
| 448 int_O_DBG_pre_bitfield |= temp_DBS; | |
| 449 } | |
| 450 | |
| 167 | 451 ////////////////////////////////////////////////////////////////////////////// |
| 452 // DBG - prior to calc. of dive | |
| 453 // | |
| 454 static void check_pre_dbg(void) | |
| 116 | 455 { |
| 456 check_dbg(0); | |
| 457 } | |
| 458 | |
| 167 | 459 ////////////////////////////////////////////////////////////////////////////// |
| 460 // DBG - after decocalc of dive | |
| 461 // | |
| 462 static void check_post_dbg(void) | |
| 116 | 463 { |
| 464 check_dbg(1); | |
| 465 } | |
| 466 | |
| 165 | 467 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 468 ////////////////////////////////////////////////////////////////////////////// |
| 469 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 470 ////////////////////////////////////////////////////////////////////////////// | |
| 471 ////////////////////////////////////////////////////////////////////////////// | |
| 472 | |
| 235 | 473 ////////////////////////////////////////////////////////////////////////////// |
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474 // Bump to blue-screen when an assert is wrong |
| 235 | 475 #ifdef __DEBUG |
| 476 void assert_failed(PARAMETER short int line) | |
| 477 { | |
| 478 extern void PLED_resetdebugger(void); | |
| 479 extern unsigned short temp10; | |
| 480 | |
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481 temp10 = line; // Show source line number as stack depth. |
| 235 | 482 PLED_resetdebugger(); |
| 483 } | |
| 484 #endif | |
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485 |
| 235 | 486 ////////////////////////////////////////////////////////////////////////////// |
| 487 // When calling C code from ASM context, the data stack pointer and | |
| 488 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
| 489 | |
| 490 #ifdef CROSS_COMPILE | |
| 491 # define RESET_C_STACK | |
| 492 #else | |
| 493 # ifdef __DEBUG | |
| 494 # define RESET_C_STACK fillDataStack(); | |
| 495 void fillDataStack(void) | |
| 496 { | |
| 497 _asm | |
| 498 LFSR 1,C_STACK | |
| 499 MOVLW 0xCC | |
| 500 loop: MOVWF POSTINC1,0 | |
| 501 TSTFSZ FSR1L,0 | |
| 502 BRA loop | |
| 503 | |
| 504 LFSR 1,C_STACK | |
| 505 LFSR 2,C_STACK | |
| 506 _endasm | |
| 507 } | |
| 508 # else | |
| 509 # define RESET_C_STACK \ | |
| 510 _asm \ | |
| 511 LFSR 1, C_STACK \ | |
| 512 LFSR 2, C_STACK \ | |
| 513 _endasm | |
| 514 # endif | |
| 515 #endif | |
| 516 | |
| 517 ////////////////////////////////////////////////////////////////////////////// | |
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518 // Read CF values from the C code. |
| 235 | 519 |
| 203 | 520 static short read_custom_function(PARAMETER unsigned char cf) |
| 167 | 521 { |
| 184 | 522 #ifdef CROSS_COMPILE |
| 523 extern unsigned short custom_functions[]; | |
| 524 return custom_functions[cf]; | |
| 525 #else | |
| 167 | 526 extern unsigned char hi, lo; |
| 527 extern void getcustom15(); | |
| 528 _asm | |
| 529 movff cf,WREG | |
| 530 call getcustom15,0 | |
| 531 movff lo,PRODL | |
| 532 movff hi,PRODH | |
| 533 _endasm | |
| 184 | 534 #endif |
| 167 | 535 } |
| 536 | |
| 537 ////////////////////////////////////////////////////////////////////////////// | |
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538 // Fast subroutine to read RTC timer 3. |
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539 // Note: result is in 1/32 of msecs. |
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540 static unsigned short tmr3(void) |
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541 { |
| 261 | 542 #ifndef CROSS_COMPILE |
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543 _asm |
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544 movff 0xfb2,PRODL // TMR3L |
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545 movff 0xfb3,PRODH // TMR3H |
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546 _endasm // result in PRODH:PRODL. |
| 261 | 547 #else |
| 548 return 0; | |
| 549 #endif | |
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550 } |
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551 |
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552 ////////////////////////////////////////////////////////////////////////////// |
| 258 | 553 // read buhlmann tables A and B for compatriment ci |
| 554 // | |
| 555 static void read_buhlmann_coefficients(void) | |
| 165 | 556 { |
| 338 | 557 |
| 184 | 558 #ifndef CROSS_COMPILE |
| 167 | 559 // Note: we don't use far rom pointer, because the |
| 338 | 560 // 24 bits is too complex, hence we have to set |
| 167 | 561 // the UPPER page ourself... |
| 562 // --> Set zero if tables are moved to lower pages ! | |
| 563 _asm | |
| 564 movlw 1 | |
| 565 movwf TBLPTRU,0 | |
| 566 _endasm | |
| 184 | 567 #endif |
| 258 | 568 |
| 338 | 569 assert( 0 <= ci && ci < NUM_COMP ); |
| 570 | |
| 571 // Use an interleaved array (AoS) to access coefficients with a | |
| 572 // single addressing. | |
| 573 { | |
| 574 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
| 575 var_N2_a = *ptr++; | |
| 576 var_N2_b = *ptr++; | |
| 577 var_He_a = *ptr++; | |
| 578 var_He_b = *ptr++; | |
| 579 } | |
| 167 | 580 |
| 165 | 581 // Check reading consistency: |
| 582 if( (var_N2_a < 0.231) | |
| 583 || (var_N2_a > 1.27) | |
| 584 || (var_N2_b < 0.504) | |
| 585 || (var_N2_b > 0.966) | |
| 586 || (var_He_a < 0.510) | |
| 587 || (var_He_a > 1.75) | |
| 588 || (var_He_b < 0.423) | |
| 589 || (var_He_b > 0.927) | |
| 590 ) | |
| 258 | 591 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; |
| 592 } | |
| 593 | |
| 594 ////////////////////////////////////////////////////////////////////////////// | |
| 595 // read buhlmann tables for compatriment ci | |
| 596 // If period == 0 : 2sec interval | |
| 597 // 1 : 1 min interval | |
| 598 // 2 : 10 min interval. | |
| 599 static void read_buhlmann_times(PARAMETER char period) | |
| 600 { | |
| 601 #ifndef CROSS_COMPILE | |
| 602 // Note: we don't use far rom pointer, because the | |
| 603 // 24 bits is to complex, hence we have to set | |
| 604 // the UPPER page ourself... | |
| 605 // --> Set zero if tables are moved to lower pages ! | |
| 606 _asm | |
| 607 movlw 1 | |
| 608 movwf TBLPTRU,0 | |
| 609 _endasm | |
| 610 #endif | |
| 338 | 611 |
| 612 assert( 0 <= ci && ci < NUM_COMP ); | |
| 258 | 613 |
| 165 | 614 // Integration intervals. |
| 167 | 615 switch(period) |
| 165 | 616 { |
| 617 case 0: //---- 2 sec ----------------------------------------------------- | |
| 338 | 618 { |
| 619 overlay rom const float* ptr = &e2secs[2*ci]; | |
| 620 var_N2_e = *ptr++; | |
| 621 var_He_e = *ptr++; | |
| 622 } | |
| 165 | 623 |
| 624 // Check reading consistency: | |
| 625 if( (var_N2_e < 0.0000363) | |
| 626 || (var_N2_e > 0.00577) | |
| 627 || (var_He_e < 0.0000961) | |
| 628 || (var_He_e > 0.150) | |
| 629 ) | |
| 630 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 631 | |
| 632 break; | |
| 633 | |
| 634 case 1: //---- 1 min ----------------------------------------------------- | |
| 338 | 635 { |
| 636 overlay rom const float* ptr = &e1min[2*ci]; | |
| 637 var_N2_e = *ptr++; | |
| 638 var_He_e = *ptr++; | |
| 639 } | |
| 165 | 640 |
| 641 // Check reading consistency: | |
| 642 if( (var_N2_e < 1.09E-3) | |
| 643 || (var_N2_e > 0.1592) | |
| 644 || (var_He_e < 0.00288) | |
| 645 || (var_He_e > 0.3682) | |
| 646 ) | |
| 647 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 648 | |
| 649 break; | |
| 650 | |
| 651 case 2: //---- 10 min ---------------------------------------------------- | |
| 338 | 652 { |
| 653 overlay rom const float* ptr = &e10min[2*ci]; | |
| 654 var_N2_e = *ptr++; | |
| 655 var_He_e = *ptr++; | |
| 656 } | |
| 165 | 657 |
| 658 // Check reading consistency: | |
| 659 if( (var_N2_e < 0.01085) | |
| 660 || (var_N2_e > 0.82323) | |
| 661 || (var_He_e < 0.02846) | |
| 662 || (var_He_e > 0.98986) | |
| 663 ) | |
| 664 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 665 | |
| 666 break; | |
| 197 | 667 |
| 668 default: | |
| 669 assert(0); // Never go there... | |
| 165 | 670 } |
| 671 } | |
| 672 | |
| 673 ////////////////////////////////////////////////////////////////////////////// | |
|
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674 // calc_nextdecodepth |
| 165 | 675 // |
| 116 | 676 // new in v.102 |
| 165 | 677 // |
| 116 | 678 // INPUT, changing during dive: |
| 192 | 679 // low_depth |
| 167 | 680 // |
| 116 | 681 // INPUT, fixed during dive: |
| 167 | 682 // pres_surface |
| 683 // GF_delta | |
| 684 // GF_high | |
| 685 // GF_low | |
| 171 | 686 // char_I_depth_last_deco |
| 167 | 687 // float_deco_distance |
| 688 // | |
| 241 | 689 // RETURN TRUE iff a stop is needed. |
| 690 // | |
| 116 | 691 // OUTPUT |
| 171 | 692 // locked_GF_step |
| 167 | 693 // temp_depth_limt |
| 192 | 694 // low_depth |
| 167 | 695 // |
| 241 | 696 static unsigned char calc_nextdecodepth(void) |
| 167 | 697 { |
| 241 | 698 //--- Max ascent speed --------------------------------------------------- |
| 699 // Recompute leading gas limit, at current depth: | |
| 317 | 700 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
| 241 | 701 |
| 702 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 302 | 703 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
| 241 | 704 |
| 705 // Do we need to stop at current depth ? | |
| 706 overlay unsigned char need_stop = 0; | |
| 707 | |
| 708 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 709 | |
| 212 | 710 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
| 116 | 711 if (char_I_deco_model == 1) |
| 712 { | |
| 241 | 713 if( depth >= low_depth ) |
| 192 | 714 sim_limit( GF_low ); |
| 715 else | |
| 716 sim_limit( GF_high - depth * locked_GF_step ); | |
| 717 | |
| 718 // Stops are needed ? | |
| 719 if( sim_lead_tissue_limit > pres_surface ) | |
| 720 { | |
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721 // Compute tolerated depth, for the leading tissue [metre]: |
| 317 | 722 overlay float depth_tol = (sim_lead_tissue_limit - pres_surface) * BAR_TO_METER; |
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723 |
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724 // Deepest stop, in multiples of 3 metres. |
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725 overlay unsigned char first_stop = 3 * (short)(0.99999 + depth_tol * 0.33333 ); |
| 192 | 726 assert( first_stop < 128 ); |
| 171 | 727 |
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728 // Is it a new deepest needed stop ? If yes this is the reference for |
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729 // the varying gradient factor. So reset that: |
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730 if( depth_tol > min_depth && depth_tol > low_depth ) |
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731 { |
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732 // Store the deepest stop depth, as reference for GF_low. |
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733 low_depth = depth_tol; |
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734 locked_GF_step = GF_delta / low_depth; |
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735 } |
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736 |
| 264 | 737 #if defined(__DEBUG) || defined(CROSS_COMPILE) |
| 261 | 738 { |
| 739 // Extra testing code to make sure the first_stop formula | |
| 740 // and rounding provides correct depth: | |
| 317 | 741 overlay float pres_stop = first_stop * METER_TO_BAR |
| 261 | 742 + pres_surface; |
| 743 | |
| 744 // Keep GF_low until a first stop depth is found: | |
| 745 if( first_stop >= low_depth ) | |
| 746 sim_limit( GF_low ); | |
| 747 else | |
| 748 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 749 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 750 sim_limit( GF_high - first_stop * locked_GF_step ); | |
| 751 | |
| 302 | 752 // upper limit (lowest pressure tolerated), + 1mbar for rounding...: |
| 753 assert( sim_lead_tissue_limit < (pres_stop + 0.001) ); | |
| 261 | 754 } |
| 755 #endif | |
| 756 | |
| 212 | 757 // Apply correction for the shallowest stop. |
| 192 | 758 if( first_stop == 3 ) // new in v104 |
| 759 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 171 | 760 |
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761 // Because gradient factor at first_stop might be bigger than at |
| 261 | 762 // current depth, we might ascent a bit more. |
| 763 // Hence, check all stops until one is indeed higher than tolerated presure: | |
| 764 while(first_stop > 0) | |
| 192 | 765 { |
| 766 overlay unsigned char next_stop; // Next index (0..30) | |
| 767 overlay float pres_stop; // Next depth (0m..90m) | |
| 171 | 768 |
| 241 | 769 // Check max speed, or reaching surface. |
| 770 if( first_stop <= min_depth ) | |
| 771 break; | |
| 772 | |
| 773 // So, there is indeed a stop needed: | |
| 774 need_stop = 1; | |
| 775 | |
| 192 | 776 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
| 777 next_stop = 0; | |
| 216 | 778 else if( first_stop == 6 ) |
| 779 next_stop = char_I_depth_last_deco; | |
| 192 | 780 else |
| 781 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 167 | 782 |
| 317 | 783 pres_stop = next_stop * METER_TO_BAR |
| 192 | 784 + pres_surface; |
| 785 | |
| 212 | 786 // Keep GF_low until a first stop depth is found: |
| 787 if( next_stop >= low_depth ) | |
| 788 sim_limit( GF_low ); | |
| 789 else | |
| 790 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 791 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 792 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 171 | 793 |
| 192 | 794 // upper limit (lowest pressure tolerated): |
| 795 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 796 break; | |
| 797 | |
| 798 // Else, validate that stop and loop... | |
| 799 first_stop = next_stop; | |
| 212 | 800 } |
| 801 | |
| 802 // next stop is the last validated depth found, aka first_stop | |
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803 temp_depth_limit = first_stop; // Stop depth, in metre. |
| 192 | 804 } |
| 171 | 805 else |
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806 temp_depth_limit = 0; // stop depth, in metre. |
| 116 | 807 } |
| 167 | 808 else //---- ZH-L16 model ------------------------------------------------- |
| 116 | 809 { |
| 192 | 810 overlay float pres_gradient; |
| 811 | |
| 812 // Original model | |
| 116 | 813 // optimized in v.101 |
| 171 | 814 // char_I_depth_last_deco included in v.101 |
| 116 | 815 |
| 192 | 816 // Compute sim_lead_tissue_limit too, but just once. |
| 817 sim_limit(1.0); | |
| 818 | |
| 819 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 167 | 820 if (pres_gradient >= 0) |
| 116 | 821 { |
| 317 | 822 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
|
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823 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
| 241 | 824 need_stop = 1; // Hit. |
| 825 | |
| 826 // Implement last stop at 4m/5m/6m... | |
| 827 if( temp_depth_limit == 3 ) | |
| 828 temp_depth_limit = char_I_depth_last_deco; | |
| 171 | 829 } |
| 116 | 830 else |
| 241 | 831 temp_depth_limit = 0; |
| 171 | 832 } |
| 212 | 833 |
| 217 | 834 //---- Check gas change -------------------------------------------------- |
| 241 | 835 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
| 836 | |
| 837 return need_stop; | |
| 167 | 838 } |
| 116 | 839 |
| 167 | 840 ////////////////////////////////////////////////////////////////////////////// |
|
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841 // copy_deco_table |
| 167 | 842 // |
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843 // Buffer the stops, once computed, so we can continue to display them |
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844 // while computing the next set. |
| 167 | 845 // |
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846 static void copy_deco_table(void) |
| 116 | 847 { |
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848 // Copy depth of the first (deepest) stop, because when reversing |
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849 // order, it will be hard to find... |
|
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850 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
|
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851 char_O_first_deco_time = internal_deco_time [0]; |
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852 |
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853 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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854 { |
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855 overlay unsigned char x, y; |
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856 |
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857 //---- First: search the first non-null depth |
| 339 | 858 for(x=(NUM_STOPS-1); x != 0; --x) |
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859 if( internal_deco_depth[x] != 0 ) break; |
| 116 | 860 |
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861 //---- Second: copy to output table (in reverse order) |
| 338 | 862 for(y=0; y<NUM_STOPS; y++, --x) |
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863 { |
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864 char_O_deco_depth[y] = internal_deco_depth[x]; |
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865 char_O_deco_time [y] = internal_deco_time [x]; |
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866 |
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867 // Stop only once the last transfer is done. |
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868 if( x == 0 ) break; |
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869 } |
| 116 | 870 |
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871 //---- Third: fill table end with null |
| 339 | 872 for(y++; y<NUM_STOPS; y++) |
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873 { |
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874 char_O_deco_time [y] = 0; |
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875 char_O_deco_depth[y] = 0; |
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876 } |
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877 } |
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878 else //---- Straight copy ------------------------------------------------ |
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879 { |
| 167 | 880 overlay unsigned char x; |
| 881 | |
| 339 | 882 for(x=0; x<NUM_STOPS; x++) |
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883 { |
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884 char_O_deco_depth[x] = internal_deco_depth[x]; |
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885 char_O_deco_time [x] = internal_deco_time [x]; |
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886 } |
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887 } |
| 167 | 888 } |
| 116 | 889 |
| 167 | 890 ////////////////////////////////////////////////////////////////////////////// |
| 116 | 891 // temp_tissue_safety // |
| 167 | 892 // |
| 116 | 893 // outsourced in v.102 |
| 167 | 894 // |
| 895 // Apply safety factors for brand ZH-L16 model. | |
| 896 // | |
| 897 static void temp_tissue_safety(void) | |
| 116 | 898 { |
| 197 | 899 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
| 900 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 901 | |
| 167 | 902 if( char_I_deco_model == 0 ) |
| 116 | 903 { |
| 904 if (temp_tissue < 0.0) | |
| 126 | 905 temp_tissue *= float_desaturation_multiplier; |
| 116 | 906 else |
| 126 | 907 temp_tissue *= float_saturation_multiplier; |
| 116 | 908 } |
| 167 | 909 } |
| 116 | 910 |
| 167 | 911 ////////////////////////////////////////////////////////////////////////////// |
| 912 ////////////////////////////////////////////////////////////////////////////// | |
| 116 | 913 // ** THE JUMP-IN CODE ** |
| 914 // ** for the asm code ** | |
| 167 | 915 ////////////////////////////////////////////////////////////////////////////// |
| 916 ////////////////////////////////////////////////////////////////////////////// | |
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917 |
| 167 | 918 ////////////////////////////////////////////////////////////////////////////// |
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919 // Called every 2 seconds during diving. |
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920 // update tissues every time. |
| 184 | 921 // |
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922 // Every 6 seconds (or slower when TTS > 16): |
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923 // - update deco table (char_O_deco_time/depth) with new values. |
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924 // - update ascent time, |
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925 // - set status to zero (so we can check there is new results). |
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926 // |
| 116 | 927 void deco_calc_hauptroutine(void) |
| 928 { | |
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929 RESET_C_STACK |
| 116 | 930 calc_hauptroutine(); |
| 931 int_O_desaturation_time = 65535; | |
| 932 } | |
| 933 | |
| 167 | 934 ////////////////////////////////////////////////////////////////////////////// |
| 184 | 935 // Reset decompression model: |
| 936 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 937 // + Reset last stop to 0m | |
| 938 // + Reset all model output. | |
| 116 | 939 void deco_clear_tissue(void) |
| 940 { | |
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941 RESET_C_STACK |
| 116 | 942 clear_tissue(); |
| 943 } | |
| 944 | |
| 167 | 945 ////////////////////////////////////////////////////////////////////////////// |
| 278 | 946 // Called every 1 min during decoplanning. |
| 947 // Update tissues for 1 min. | |
| 948 // | |
| 949 void deco_calc_tissue(void) | |
| 950 { | |
| 951 RESET_C_STACK | |
| 952 calc_hauptroutine_update_tissues(); | |
| 953 } | |
| 954 | |
| 955 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 956 |
| 116 | 957 void deco_calc_wo_deco_step_1_min(void) |
| 958 { | |
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959 RESET_C_STACK |
| 116 | 960 calc_wo_deco_step_1_min(); |
| 961 deco_calc_desaturation_time(); | |
| 962 } | |
| 963 | |
| 167 | 964 ////////////////////////////////////////////////////////////////////////////// |
| 965 | |
| 116 | 966 void deco_debug(void) |
| 967 { | |
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968 RESET_C_STACK |
| 116 | 969 } |
| 970 | |
| 241 | 971 |
| 972 ////////////////////////////////////////////////////////////////////////////// | |
| 973 // Find current gas in the list (if any). | |
| 974 // | |
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975 // Input: char_I_current_gas. |
| 241 | 976 // |
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977 // Output: sim_gas_last_depth, temp_depth_limit. |
| 241 | 978 // |
| 979 static void gas_switch_find_current(void) | |
| 980 { | |
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981 assert( 0 <= char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
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982 |
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983 if( (char_I_current_gas <= NUM_GAS) // Gas6 == manual set. |
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984 && char_I_deco_gas_change[char_I_current_gas-1] |
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985 ) |
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986 { |
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987 sim_gas_last_used = char_I_current_gas-1; |
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988 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used]; |
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989 // temp_depth_limit = ??? |
| 241 | 990 } |
| 991 } | |
| 992 | |
| 167 | 993 ////////////////////////////////////////////////////////////////////////////// |
| 217 | 994 // Find deepest available gas. |
| 201 | 995 // |
| 241 | 996 // Input: temp_depth_limit, |
| 997 // deco_gas_change[] | |
| 998 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
| 212 | 999 // |
| 241 | 1000 // RETURNS TRUE if a stop is needed for gas switch. |
| 1001 // | |
| 1002 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
| 212 | 1003 // |
| 241 | 1004 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
| 1005 // are null), or during the ascent to make sure we are not passing a | |
| 1006 // stop (in which case both can be already set). | |
| 1007 // | |
| 1008 static unsigned char gas_switch_deepest(void) | |
| 201 | 1009 { |
| 241 | 1010 overlay unsigned char switch_deco = 0, switch_last = 0; |
| 201 | 1011 |
| 1012 if (char_I_const_ppO2 == 0) | |
| 1013 { | |
| 225 | 1014 overlay unsigned char j; |
| 1015 | |
| 241 | 1016 // Loop over all enabled gas, to find the deepest one, |
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1017 // above last used gas, but below temp_depth_limit. |
| 338 | 1018 for(j=0; j<NUM_GAS; ++j) |
| 225 | 1019 { |
| 241 | 1020 // Gas not (yet) allowed ? Skip ! |
| 1021 if( temp_depth_limit > deco_gas_change[j] ) | |
| 1022 continue; | |
| 1023 | |
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1024 // Gas deeper (or equal) than the current one ? Skip ! |
| 241 | 1025 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
| 1026 continue; | |
| 1027 | |
| 1028 // First, or deeper ? | |
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1029 if( switch_deco < deco_gas_change[j] ) |
| 241 | 1030 { |
| 1031 switch_deco = deco_gas_change[j]; | |
| 1032 switch_last = j+1; | |
| 1033 } | |
| 225 | 1034 } |
| 201 | 1035 } |
| 1036 | |
| 203 | 1037 // If there is a better gas available |
| 241 | 1038 if( switch_deco ) |
| 201 | 1039 { |
| 241 | 1040 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
| 201 | 1041 |
| 241 | 1042 // Should restart gas-switch delay only when gas do changes... |
| 1043 assert( sim_gas_delay <= sim_dive_mins ); | |
| 217 | 1044 |
| 241 | 1045 sim_gas_last_depth = switch_deco; |
| 1046 sim_gas_last_used = switch_last; | |
| 1047 sim_gas_delay = read_custom_function(55); | |
| 217 | 1048 |
| 241 | 1049 // Apply depth correction ONLY if CF#55 is not null: |
| 1050 if( sim_gas_delay > 0 ) | |
| 225 | 1051 { |
| 241 | 1052 sim_gas_delay += sim_dive_mins; |
| 1053 temp_depth_limit = switch_deco; | |
| 1054 return 1; | |
| 225 | 1055 } |
| 241 | 1056 |
| 1057 return 0; | |
| 217 | 1058 } |
| 1059 | |
| 241 | 1060 sim_gas_delay = 0; |
| 1061 return 0; | |
| 217 | 1062 } |
| 1063 | |
| 1064 ////////////////////////////////////////////////////////////////////////////// | |
| 1065 // Calculate gas switches | |
| 1066 // | |
| 1067 // | |
| 1068 // Input: N2_ratio, He_ratio. | |
| 1069 // sim_gas_last_used | |
| 1070 // | |
| 1071 // Output: calc_N2_ratio, calc_He_ratio | |
| 1072 // | |
| 241 | 1073 static void gas_switch_set(void) |
| 217 | 1074 { |
| 338 | 1075 assert( 0 <= sim_gas_last_used && sim_gas_last_used <= NUM_GAS ); |
| 217 | 1076 |
| 224 | 1077 if( sim_gas_last_used == 0 ) |
| 1078 { | |
| 1079 calc_N2_ratio = N2_ratio; | |
| 1080 calc_He_ratio = He_ratio; | |
| 1081 } | |
| 1082 else | |
| 1083 { | |
| 1084 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
| 1085 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
| 217 | 1086 } |
| 201 | 1087 |
| 1088 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
| 1089 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
| 1090 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
| 1091 } | |
| 1092 | |
| 1093 ////////////////////////////////////////////////////////////////////////////// | |
| 1094 // | |
| 212 | 1095 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
| 1096 // temp_deco : simulated respiration pressure + security offset (deco_distance) | |
| 276 | 1097 // float_deco_distance : security factor. |
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1098 // Water-vapor pressure inside limbs (ppWater). |
| 212 | 1099 // |
| 236 | 1100 // Output: ppN2, ppHe. |
| 212 | 1101 // |
| 1102 static void sim_alveolar_presures(void) | |
| 201 | 1103 { |
| 212 | 1104 overlay float deco_diluent = temp_deco; // new in v.101 |
| 1105 | |
| 276 | 1106 // Take deco offset into account, but not at surface. |
| 1107 // Note: this should be done on ambiant pressure, hence before | |
| 1108 // computing the diluant partial pressure... | |
| 1109 if( deco_diluent > pres_surface ) | |
| 1110 deco_diluent += float_deco_distance; | |
| 1111 | |
| 212 | 1112 //---- CCR mode : deco gas switch ? -------------------------------------- |
| 276 | 1113 if( char_I_const_ppO2 != 0 ) |
| 201 | 1114 { |
| 276 | 1115 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
| 1116 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
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1117 // ppWater in the equations below: |
| 321 | 1118 deco_diluent -= const_ppO2; |
| 276 | 1119 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
| 212 | 1120 |
| 1121 if (deco_diluent > temp_deco) | |
| 1122 deco_diluent = temp_deco; | |
| 201 | 1123 } |
| 1124 | |
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1125 if( deco_diluent > ppWater ) |
| 201 | 1126 { |
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1127 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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1128 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
| 201 | 1129 } |
| 1130 else | |
| 1131 { | |
| 236 | 1132 ppN2 = 0.0; |
| 201 | 1133 ppHe = 0.0; |
| 1134 } | |
| 236 | 1135 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
| 201 | 1136 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
| 1137 } | |
| 1138 | |
| 1139 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 1140 // clear_tissue |
| 1141 // | |
| 165 | 1142 // optimized in v.101 (var_N2_a) |
| 167 | 1143 // |
| 1144 // preload tissues with standard pressure for the given ambient pressure. | |
| 1145 // Note: fixed N2_ratio for standard air. | |
| 201 | 1146 // |
| 167 | 1147 static void clear_tissue(void) |
| 116 | 1148 { |
| 1149 flag_in_divemode = 0; | |
| 1150 int_O_DBS_bitfield = 0; | |
| 1151 int_O_DBS2_bitfield = 0; | |
| 1152 int_O_DBG_pre_bitfield = 0; | |
| 1153 int_O_DBG_post_bitfield = 0; | |
| 1154 char_O_NDL_at_20mtr = 255; | |
| 1155 | |
| 167 | 1156 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
| 1157 N2_ratio = 0.7902; | |
| 212 | 1158 pres_respiration = int_I_pres_respiration * 0.001; |
| 164 | 1159 |
| 338 | 1160 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1161 { |
| 197 | 1162 // cycle through the 16 Bühlmann tissues |
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1163 overlay float p = N2_ratio * (pres_respiration - ppWater); |
| 339 | 1164 pres_tissue_N2[ci] = p; |
| 197 | 1165 |
| 1166 // cycle through the 16 Bühlmann tissues for Helium | |
| 339 | 1167 pres_tissue_He[ci] = 0.0; |
| 338 | 1168 } // for 0 to 15 |
| 116 | 1169 |
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1170 clear_deco_table(); |
| 126 | 1171 char_O_deco_status = 0; |
| 1172 char_O_nullzeit = 0; | |
| 168 | 1173 int_O_ascenttime = 0; |
| 126 | 1174 char_O_gradient_factor = 0; |
| 1175 char_O_relative_gradient_GF = 0; | |
| 197 | 1176 char_I_depth_last_deco = 0; // for compatibility with v.101pre_no_last_deco |
| 258 | 1177 |
| 1178 calc_lead_tissue_limit = 0.0; | |
| 1179 char_O_gtissue_no = 0; | |
| 167 | 1180 } |
| 116 | 1181 |
| 167 | 1182 ////////////////////////////////////////////////////////////////////////////// |
| 1183 // calc_hauptroutine | |
| 1184 // | |
| 1185 // this is the major code in dive mode calculates: | |
| 116 | 1186 // the tissues, |
| 167 | 1187 // the bottom time, |
| 1188 // and simulates the ascend with all deco stops. | |
| 171 | 1189 // |
| 1190 // The deco_state sequence is : | |
| 1191 // 3 (at surface) | |
| 1192 // +---> 0 : calc nullzeit | |
| 1193 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 1194 // | +-> 1 : simulate up to 16min of stops. | |
| 1195 // | +------< not finished | |
| 1196 // +--------< finish | |
| 1197 // | |
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1198 // Added steps 6,5 for @+5 calculation: |
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1199 // 6 = ascent to first stop (same as 2), except continue to 7 |
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1200 // 7 = same as 1, except loop to 7. |
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1201 // |
| 167 | 1202 static void calc_hauptroutine(void) |
| 116 | 1203 { |
| 241 | 1204 static unsigned char backup_gas_used = 0; |
| 1205 static unsigned char backup_gas_depth = 0; | |
| 217 | 1206 static unsigned char backup_gas_delay = 0; |
| 186 | 1207 |
| 116 | 1208 calc_hauptroutine_data_input(); |
| 1209 | |
| 1210 if(!flag_in_divemode) | |
| 1211 { | |
| 1212 flag_in_divemode = 1; | |
| 1213 create_dbs_set_dbg_and_ndl20mtr(); | |
| 1214 } | |
| 1215 else | |
| 1216 check_pre_dbg(); | |
| 1217 | |
| 1218 calc_hauptroutine_update_tissues(); | |
| 1219 calc_gradient_factor(); | |
| 1220 | |
| 167 | 1221 // toggle between calculation for nullzeit (bottom time), |
| 1222 // deco stops | |
| 1223 // and more deco stops (continue) | |
| 1224 switch( char_O_deco_status ) | |
| 116 | 1225 { |
| 186 | 1226 case 3: //---- At surface: start a new dive ------------------------------ |
| 1227 clear_deco_table(); | |
| 1228 copy_deco_table(); | |
| 200 | 1229 int_O_ascenttime = 0; // Reset DTR. |
| 323 | 1230 int_O_extra_ascenttime = 0; |
| 200 | 1231 char_O_nullzeit = 0; // Reset bottom time. |
| 278 | 1232 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
| 201 | 1233 |
| 217 | 1234 // Values that should be reset just once for the full real dive. |
| 1235 // This is used to record the lowest stop for the whole dive, | |
| 1236 // Including ACCROSS all simulated ascent. | |
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1237 low_depth = 0.0; |
| 217 | 1238 |
| 1239 // Reset gas switch history. | |
| 241 | 1240 backup_gas_used = sim_gas_last_used = 0; |
| 1241 backup_gas_depth = sim_gas_last_depth = 0; | |
| 217 | 1242 backup_gas_delay = sim_gas_delay = 0; |
| 203 | 1243 sim_dive_mins = 0; |
| 1244 break; | |
| 186 | 1245 |
| 167 | 1246 case 0: //---- bottom time ----------------------------------------------- |
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1247 default: |
| 167 | 1248 calc_nullzeit(); |
| 1249 check_ndl(); | |
| 186 | 1250 char_O_deco_status = 2; // calc ascent next time. |
| 1251 break; | |
| 1252 | |
| 1253 case 2: //---- Simulate ascent to first stop ----------------------------- | |
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1254 case 6: // @+5min variation |
| 203 | 1255 // Check proposed gas at begin of ascent simulation |
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1256 sim_dive_mins = int_I_divemins; // Init current time. |
| 241 | 1257 |
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1258 gas_switch_find_current(); // Lookup for current gas & time. |
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1259 gas_switch_set(); // setup calc_ratio's |
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1260 |
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1261 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1262 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
| 203 | 1263 backup_gas_delay = sim_gas_delay; |
| 186 | 1264 |
| 1265 sim_ascent_to_first_stop(); | |
| 201 | 1266 |
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1267 // Calc stops next time (deco or gas switch). |
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1268 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
| 167 | 1269 break; |
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1270 |
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1271 case 1: //---- Simulate stops -------------------------------------------- |
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1272 case 5: // @+5 variation. |
| 167 | 1273 calc_hauptroutine_calc_deco(); |
| 186 | 1274 |
| 1275 // If simulation is finished, restore the GF low reference, so that | |
| 1276 // next ascent simulation is done from the current depth: | |
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1277 if( (char_O_deco_status & 3) == 0 ) |
| 186 | 1278 { |
| 241 | 1279 sim_gas_last_used = backup_gas_used; |
| 1280 sim_gas_last_depth = backup_gas_depth; | |
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1281 sim_gas_delay = backup_gas_delay; |
| 186 | 1282 } |
| 167 | 1283 break; |
| 116 | 1284 } |
| 167 | 1285 |
| 116 | 1286 check_post_dbg(); |
| 1287 } | |
| 1288 | |
| 167 | 1289 ////////////////////////////////////////////////////////////////////////////// |
| 1290 // calc_hauptroutine_data_input | |
| 1291 // | |
| 1292 // Reset all C-code dive parameters from their ASM-code values. | |
| 1293 // Detect gas change condition. | |
| 1294 // | |
| 116 | 1295 void calc_hauptroutine_data_input(void) |
| 1296 { | |
| 203 | 1297 overlay short int_temp; |
| 126 | 1298 |
| 197 | 1299 pres_respiration = int_I_pres_respiration * 0.001; |
| 1300 pres_surface = int_I_pres_surface * 0.001; | |
| 1301 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1302 He_ratio = char_I_He_ratio * 0.01; | |
| 1303 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
| 116 | 1304 |
| 126 | 1305 // ____________________________________________________ |
| 1306 // | |
| 1307 // _____________ G A S _ C H A N G E S ________________ | |
| 1308 // ____________________________________________________ | |
| 1309 | |
| 212 | 1310 // Keep a margin of 150mbar = 1.50m |
| 1311 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1312 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 126 | 1313 |
| 225 | 1314 deco_gas_change[0] = 0; |
| 1315 deco_gas_change[1] = 0; | |
| 1316 deco_gas_change[2] = 0; | |
| 1317 deco_gas_change[3] = 0; | |
| 1318 deco_gas_change[4] = 0; | |
| 116 | 1319 |
| 203 | 1320 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
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1321 if(char_I_deco_gas_change[0]) |
| 126 | 1322 { |
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1323 if( int_temp > 100 *(short)char_I_deco_gas_change[0] ) |
| 225 | 1324 deco_gas_change[0] = char_I_deco_gas_change[0]; |
| 126 | 1325 } |
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1326 if(char_I_deco_gas_change[1]) |
| 126 | 1327 { |
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1328 if( int_temp > 100 *(short)char_I_deco_gas_change[1] ) |
| 225 | 1329 deco_gas_change[1] = char_I_deco_gas_change[1]; |
| 126 | 1330 } |
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1331 if(char_I_deco_gas_change[2]) |
| 126 | 1332 { |
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1333 if( int_temp > 100 *(short)char_I_deco_gas_change[2] ) |
| 225 | 1334 deco_gas_change[2] = char_I_deco_gas_change[2]; |
| 126 | 1335 } |
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1336 if(char_I_deco_gas_change[3]) |
| 126 | 1337 { |
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1338 if( int_temp > 100 *(short)char_I_deco_gas_change[3] ) |
| 225 | 1339 deco_gas_change[3] = char_I_deco_gas_change[3]; |
| 126 | 1340 } |
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1341 if(char_I_deco_gas_change[4]) |
| 126 | 1342 { |
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1343 if( int_temp > 100 *(short)char_I_deco_gas_change[4] ) |
| 225 | 1344 deco_gas_change[4] = char_I_deco_gas_change[4]; |
| 126 | 1345 } |
| 116 | 1346 |
| 197 | 1347 const_ppO2 = char_I_const_ppO2 * 0.01; |
| 1348 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1349 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1350 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1351 GF_high = char_I_GF_High_percentage * 0.01; | |
| 126 | 1352 GF_delta = GF_high - GF_low; |
| 116 | 1353 } |
| 1354 | |
| 167 | 1355 ////////////////////////////////////////////////////////////////////////////// |
| 171 | 1356 // |
| 1357 // | |
| 116 | 1358 void calc_hauptroutine_update_tissues(void) |
| 1359 { | |
| 197 | 1360 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
| 1361 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
| 1362 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
| 237 | 1363 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1364 |
| 276 | 1365 pres_diluent = pres_respiration; |
| 307 | 1366 if( char_I_const_ppO2 != 0 ) // new in v.101 |
| 186 | 1367 { |
| 322 | 1368 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
| 1369 | |
| 276 | 1370 pres_diluent -= const_ppO2; // new in v.101 |
| 1371 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
| 321 | 1372 if( pres_diluent < 0.0 ) |
| 1373 pres_diluent = 0.0; | |
| 276 | 1374 if( pres_diluent > pres_respiration ) // new in v.101 |
| 1375 pres_diluent = pres_respiration; // new in v.101 | |
| 307 | 1376 |
| 321 | 1377 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
| 322 | 1378 |
| 326 | 1379 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
| 322 | 1380 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
| 1381 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
| 186 | 1382 } |
| 307 | 1383 |
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1384 if( pres_diluent > ppWater ) // new in v.101 |
| 116 | 1385 { |
| 307 | 1386 overlay float EAD, END; |
| 1387 | |
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1388 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1389 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
| 307 | 1390 |
| 1391 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
| 1392 // with plain air. | |
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1393 // ppN2 = 79% * (P_EAD - ppWater) |
| 307 | 1394 // EAD = (P_EAD - Psurface) * 10 |
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1395 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
| 317 | 1396 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
| 307 | 1397 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
| 317 | 1398 char_O_EAD = (unsigned char)(EAD + 0.5); |
| 307 | 1399 |
| 1400 // END : Equivalent Narcotic Dive. | |
| 1401 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
| 1402 // 0.23 btw). Hence the formula becomes: | |
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1403 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
| 317 | 1404 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
| 307 | 1405 // |
| 1406 // Source cited: | |
| 1407 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
| 1408 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
| 317 | 1409 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
| 307 | 1410 if( END < 0.0 || END > 245.5 ) END = 0.0; |
| 317 | 1411 char_O_END = (unsigned char)(END + 0.5); |
| 116 | 1412 } |
| 167 | 1413 else // new in v.101 |
| 116 | 1414 { |
| 236 | 1415 ppN2 = 0.0; // new in v.101 |
| 200 | 1416 ppHe = 0.0; // new in v.101 |
| 307 | 1417 char_O_EAD = char_O_END = 0; |
| 116 | 1418 } |
| 1419 | |
| 1420 if(!char_I_step_is_1min) | |
| 192 | 1421 calc_tissue(0); |
| 116 | 1422 else |
| 192 | 1423 calc_tissue(1); |
| 186 | 1424 |
| 192 | 1425 // Calc limit for surface, ie. GF_high. |
| 258 | 1426 calc_limit(); |
| 186 | 1427 |
| 203 | 1428 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
| 339 | 1429 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
| 192 | 1430 |
| 1431 // if guiding tissue can not be exposed to surface pressure immediately | |
| 1432 if( calc_lead_tissue_limit > pres_surface && char_O_deco_status == 0) | |
| 116 | 1433 { |
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1434 char_O_nullzeit = 0; // deco necessary |
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1435 char_O_deco_status = 2; // calculate ascent on next iteration. |
| 116 | 1436 } |
| 171 | 1437 } |
| 1438 | |
| 116 | 1439 |
| 167 | 1440 ////////////////////////////////////////////////////////////////////////////// |
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1441 // Compute stops. |
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1442 // |
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1443 // Note: because this can be very long, break on 16 iterations, and set state |
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1444 // to 0 when finished, or to 1 when needing to continue. |
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1445 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
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1446 // break the loop when total time > 512msec. |
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1447 // |
| 116 | 1448 void calc_hauptroutine_calc_deco(void) |
| 1449 { | |
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1450 overlay unsigned char loop; |
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1451 |
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1452 for(loop = 0; loop < 16; ++loop) |
| 116 | 1453 { |
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1454 // Limit loops to 512ms, using the RTC timer 3: |
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1455 if( tmr3() & (512*32) ) |
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1456 break; |
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1457 |
| 241 | 1458 // Do not ascent while doing a gas switch ? |
| 203 | 1459 if( sim_gas_delay <= sim_dive_mins ) |
| 1460 { | |
| 241 | 1461 if( calc_nextdecodepth() ) |
| 1462 { | |
| 1463 if( temp_depth_limit == 0 ) | |
| 1464 goto Surface; | |
| 116 | 1465 |
| 241 | 1466 //---- We hit a stop at temp_depth_limit --------------------- |
| 317 | 1467 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
| 241 | 1468 + pres_surface; // To absolute. |
| 1469 update_deco_table(); // Adds a one minute stops. | |
| 1470 } | |
| 1471 else | |
| 1472 { | |
| 1473 //---- No stop ----------------------------------------------- | |
| 317 | 1474 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
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1475 |
| 241 | 1476 //---- Finish computations once surface is reached ----------- |
| 1477 if( temp_deco <= pres_surface ) | |
| 1478 { | |
| 1479 Surface: | |
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1480 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
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1481 copy_deco_table(); |
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1482 |
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1483 calc_ascenttime(); |
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1484 char_O_deco_status = 0; // calc nullzeit next time. |
| 323 | 1485 char_O_deco_last_stop = 0; // Surface reached (to animate menu) |
| 241 | 1486 return; |
| 1487 } | |
| 1488 } | |
| 212 | 1489 } |
| 1490 else | |
|
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1491 { |
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1492 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1493 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
| 241 | 1494 update_deco_table(); // Just pass one minute. |
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1495 } |
| 197 | 1496 |
| 241 | 1497 //---- Then update tissue -------------------------------------------- |
| 203 | 1498 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1499 gas_switch_set(); // Apply any simulated gas change, once validated. |
| 212 | 1500 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
| 192 | 1501 sim_tissue(1); // Simulate compartiments for 1 minute. |
| 116 | 1502 } |
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1503 |
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1504 // Surface not reached, need more stops... |
| 278 | 1505 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
| 116 | 1506 } |
| 1507 | |
| 167 | 1508 ////////////////////////////////////////////////////////////////////////////// |
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1509 // Simulation ascention to first deco stop. |
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1510 // |
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1511 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1512 // there is no need to break on more that 16 iterations |
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1513 // (or we are already in deep shit). |
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1514 // |
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1515 // Input: pres_respiration |
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1516 // Output: temp_deco |
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1517 // |
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1518 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1519 // before ascent. |
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1520 void sim_ascent_to_first_stop(void) |
| 116 | 1521 { |
| 171 | 1522 update_startvalues(); |
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1523 clear_deco_table(); |
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1524 |
| 200 | 1525 temp_deco = pres_respiration; // Starts from current real depth. |
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1526 |
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1527 // Are we doing the special @+5min variation ? |
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1528 if(char_O_deco_status & 4) |
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1529 sim_extra_time(); |
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1530 |
| 212 | 1531 // Do we have a gas switch going on ? |
| 1532 if( sim_gas_delay > sim_dive_mins ) | |
| 1533 return; | |
| 1534 | |
| 241 | 1535 //---- Loop until first stop, gas switch, or surface is reached ---------- |
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1536 for(;;) |
| 116 | 1537 { |
| 241 | 1538 // Try ascending 1 full minute. |
| 317 | 1539 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. |
| 203 | 1540 |
| 212 | 1541 // Compute sim_lead_tissue_limit at GF_low (deepest stop). |
| 1542 sim_limit(GF_low); | |
| 1543 | |
| 1544 // Did we reach deepest remaining stop ? | |
| 241 | 1545 if( temp_deco < sim_lead_tissue_limit ) |
| 212 | 1546 { |
| 317 | 1547 temp_deco += 10*METER_TO_BAR; // Restore last correct depth, |
| 1548 break; // End fast ascent. | |
| 212 | 1549 } |
| 1550 | |
| 203 | 1551 // Did we reach surface ? |
| 1552 if( temp_deco <= pres_surface ) | |
| 1553 { | |
| 1554 temp_deco = pres_surface; // Yes: finished ! | |
| 1555 break; | |
| 1556 } | |
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1557 |
| 241 | 1558 // Check for gas change below new depth ? |
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1559 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
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1560 assert( temp_depth_limit > 0); |
| 241 | 1561 |
| 1562 if( gas_switch_deepest() ) | |
| 1563 { | |
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1564 assert( temp_depth_limit > 0); |
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1565 |
| 317 | 1566 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
| 212 | 1567 break; |
| 241 | 1568 } |
| 171 | 1569 |
| 203 | 1570 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1571 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
| 203 | 1572 sim_tissue(1); // and update tissues for 1 min. |
| 1573 } | |
| 167 | 1574 } |
| 116 | 1575 |
| 167 | 1576 ////////////////////////////////////////////////////////////////////////////// |
|
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1577 // Simulation extra time at the current depth. |
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1578 // |
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1579 // This routine is used for @+5min feature. |
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1580 void sim_extra_time(void) |
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1581 { |
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1582 overlay unsigned char extra = read_custom_function(58); |
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1583 do { |
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1584 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1585 sim_tissue(1); // and update tissues for 1 min. |
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1586 } while( --extra != 0 ); |
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1587 } |
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1588 |
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1589 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 1590 // calc_tissue |
| 1591 // | |
| 116 | 1592 // optimized in v.101 |
| 167 | 1593 // |
| 184 | 1594 static void calc_tissue(PARAMETER unsigned char period) |
| 116 | 1595 { |
| 251 | 1596 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1597 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1598 |
| 338 | 1599 for (ci=0;ci<NUM_COMP;ci++) |
| 126 | 1600 { |
| 258 | 1601 read_buhlmann_times(period); // 2 sec or 1 min period. |
| 116 | 1602 |
| 126 | 1603 // N2 |
| 339 | 1604 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1605 temp_tissue_safety(); |
| 339 | 1606 pres_tissue_N2[ci] += temp_tissue; |
| 165 | 1607 |
| 126 | 1608 // He |
| 339 | 1609 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
| 126 | 1610 temp_tissue_safety(); |
| 339 | 1611 pres_tissue_He[ci] += temp_tissue; |
| 192 | 1612 } |
| 167 | 1613 } |
| 116 | 1614 |
| 167 | 1615 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1616 // calc_limit |
| 167 | 1617 // |
| 192 | 1618 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
| 167 | 1619 // |
| 258 | 1620 static void calc_limit(void) |
| 167 | 1621 { |
| 192 | 1622 char_O_gtissue_no = 255; |
| 1623 calc_lead_tissue_limit = 0.0; | |
| 1624 | |
| 338 | 1625 for(ci=0; ci<NUM_COMP;ci++) |
| 192 | 1626 { |
| 339 | 1627 overlay float N2 = pres_tissue_N2[ci]; |
| 1628 overlay float He = pres_tissue_He[ci]; | |
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1629 overlay float p = N2 + He; |
| 192 | 1630 |
| 258 | 1631 read_buhlmann_coefficients(); |
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1632 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1633 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
| 116 | 1634 |
| 192 | 1635 // Apply the Eric Baker's varying gradient factor correction. |
| 1636 // Note: the correction factor depends both on GF and b, | |
| 1637 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1638 // so that can change who is the leading gas... | |
| 1639 // Note: Also depends of the GF. So the calcul is different for | |
| 1640 // GF_low, current GF, or GF_high... | |
| 1641 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1642 // hence what would happend at surface, | |
| 1643 // hence at GF_high. | |
| 1644 if( char_I_deco_model == 1 ) | |
| 258 | 1645 p = ( p - var_N2_a * GF_high) * var_N2_b |
| 1646 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
| 192 | 1647 else |
| 1648 p = (p - var_N2_a) * var_N2_b; | |
| 258 | 1649 if( p < 0.0 ) p = 0.0; |
| 192 | 1650 |
| 1651 if( p > calc_lead_tissue_limit ) | |
| 1652 { | |
| 1653 char_O_gtissue_no = ci; | |
| 1654 calc_lead_tissue_limit = p; | |
| 1655 } | |
| 1656 } | |
| 197 | 1657 |
| 338 | 1658 assert( char_O_gtissue_no < NUM_COMP ); |
| 197 | 1659 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
| 167 | 1660 } |
| 1661 | |
| 1662 ////////////////////////////////////////////////////////////////////////////// | |
| 1663 // calc_nullzeit | |
| 1664 // | |
| 1665 // calculates the remaining bottom time | |
| 1666 // | |
| 1667 // unchanged in v.101 | |
| 1668 // | |
| 1669 static void calc_nullzeit(void) | |
| 1670 { | |
| 203 | 1671 overlay unsigned char loop; |
| 200 | 1672 update_startvalues(); |
| 167 | 1673 |
| 116 | 1674 char_O_nullzeit = 0; |
| 167 | 1675 for(loop = 1; loop <= 17; loop++) |
| 116 | 1676 { |
| 1677 backup_sim_pres_tissue(); | |
| 197 | 1678 sim_tissue(2); // 10 min. |
| 192 | 1679 sim_limit(GF_high); |
| 167 | 1680 |
| 192 | 1681 if( sim_lead_tissue_limit > pres_surface ) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately |
| 185 | 1682 { |
| 1683 restore_sim_pres_tissue(); | |
| 1684 break; | |
| 1685 } | |
| 1686 // Validate once we know its good. | |
| 1687 char_O_nullzeit += 10; | |
| 167 | 1688 } |
| 1689 | |
| 116 | 1690 if (char_O_nullzeit < 60) |
| 1691 { | |
| 167 | 1692 for(loop=1; loop <= 10; loop++) |
| 116 | 1693 { |
| 197 | 1694 sim_tissue(1); // 1 min |
| 192 | 1695 sim_limit(GF_high); |
| 1696 | |
| 1697 if( sim_lead_tissue_limit > pres_surface) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately | |
| 185 | 1698 break; |
| 1699 char_O_nullzeit++; | |
| 167 | 1700 } |
| 185 | 1701 } |
| 1702 } | |
| 116 | 1703 |
| 167 | 1704 ////////////////////////////////////////////////////////////////////////////// |
| 1705 // backup_sim_pres_tissue | |
| 1706 // | |
| 116 | 1707 void backup_sim_pres_tissue(void) |
| 1708 { | |
| 167 | 1709 overlay unsigned char x; |
| 1710 | |
| 339 | 1711 for(x=0; x<NUM_COMP; x++) |
| 1712 { | |
| 1713 sim_pres_tissue_backup_N2[x] = sim_pres_tissue_N2[x]; | |
| 1714 sim_pres_tissue_backup_He[x] = sim_pres_tissue_He[x]; | |
| 1715 } | |
| 167 | 1716 } |
| 116 | 1717 |
| 167 | 1718 ////////////////////////////////////////////////////////////////////////////// |
| 1719 // restore_sim_pres_tissue | |
| 1720 // | |
| 116 | 1721 void restore_sim_pres_tissue(void) |
| 1722 { | |
| 167 | 1723 overlay unsigned char x; |
| 1724 | |
| 339 | 1725 for(x=0; x<NUM_COMP; x++) |
| 1726 { | |
| 1727 sim_pres_tissue_N2[x] = sim_pres_tissue_backup_N2[x]; | |
| 1728 sim_pres_tissue_He[x] = sim_pres_tissue_backup_He[x]; | |
| 1729 } | |
| 167 | 1730 } |
| 116 | 1731 |
| 167 | 1732 ////////////////////////////////////////////////////////////////////////////// |
| 1733 // calc_ascenttime | |
| 1734 // | |
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1735 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1736 // and all stops. |
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1737 // |
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1738 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
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1739 static void calc_ascenttime(void) |
| 116 | 1740 { |
| 323 | 1741 overlay unsigned char x; |
| 1742 overlay unsigned short sum; | |
| 168 | 1743 |
| 323 | 1744 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
| 1745 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
| 1746 if (ascent < 0.0) | |
| 1747 ascent = 0.0; | |
| 1748 sum = (unsigned short)(ascent + 0.99); | |
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1749 |
| 338 | 1750 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
| 323 | 1751 sum += (unsigned short)internal_deco_time[x]; |
| 1752 | |
| 1753 if( char_O_deco_status == 1 ) | |
| 1754 int_O_ascenttime = sum; | |
| 126 | 1755 else |
| 323 | 1756 int_O_extra_ascenttime = sum; |
| 167 | 1757 } |
| 116 | 1758 |
| 167 | 1759 ////////////////////////////////////////////////////////////////////////////// |
| 1760 // update_startvalues | |
| 1761 // | |
| 116 | 1762 // updated in v.102 |
| 167 | 1763 // |
| 116 | 1764 void update_startvalues(void) |
| 1765 { | |
| 167 | 1766 overlay unsigned char x; |
| 116 | 1767 |
| 201 | 1768 // Start ascent simulation with current tissue partial pressures. |
| 339 | 1769 for(x=0; x<NUM_COMP; x++) |
| 116 | 1770 { |
| 339 | 1771 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
| 1772 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
| 116 | 1773 } |
| 197 | 1774 |
| 201 | 1775 // No leading tissue (yet) for this ascent simulation. |
| 197 | 1776 sim_lead_tissue_limit = 0.0; |
| 1777 sim_lead_tissue_no = 255; | |
| 167 | 1778 } |
| 116 | 1779 |
| 167 | 1780 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1781 // sim_tissue |
| 167 | 1782 // |
| 116 | 1783 // optimized in v.101 |
| 167 | 1784 // |
| 1785 // Function very simular to calc_tissue, but: | |
| 1786 // + Use a 1min or 10min period. | |
| 1787 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 184 | 1788 static void sim_tissue(PARAMETER unsigned char period) |
| 116 | 1789 { |
| 251 | 1790 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1791 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1792 |
| 338 | 1793 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 1794 { |
| 258 | 1795 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
| 165 | 1796 |
| 126 | 1797 // N2 |
| 339 | 1798 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
| 126 | 1799 temp_tissue_safety(); |
| 339 | 1800 sim_pres_tissue_N2[ci] += temp_tissue; |
| 126 | 1801 |
| 1802 // He | |
| 339 | 1803 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
| 126 | 1804 temp_tissue_safety(); |
| 339 | 1805 sim_pres_tissue_He[ci] += temp_tissue; |
| 192 | 1806 } |
| 167 | 1807 } |
| 116 | 1808 |
| 167 | 1809 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1810 // sim_limit() |
| 1811 // | |
| 1812 // New in v.111 | |
| 1813 // | |
| 1814 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1815 // different depth, because it depends on current gradient factor. | |
| 167 | 1816 // |
| 192 | 1817 static void sim_limit(PARAMETER float GF_current) |
| 116 | 1818 { |
| 212 | 1819 assert( 0.0 < GF_current && GF_current <= 1.0f); |
| 1820 | |
| 192 | 1821 sim_lead_tissue_limit = 0.0; |
| 212 | 1822 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
| 192 | 1823 |
| 338 | 1824 for(ci=0; ci<NUM_COMP; ci++) |
| 192 | 1825 { |
| 339 | 1826 overlay float N2 = sim_pres_tissue_N2[ci]; |
| 1827 overlay float He = sim_pres_tissue_He[ci]; | |
| 241 | 1828 overlay float p = N2 + He; |
| 192 | 1829 |
| 258 | 1830 read_buhlmann_coefficients(); |
| 241 | 1831 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
| 1832 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 192 | 1833 |
| 1834 // Apply the Eric Baker's varying gradient factor correction. | |
| 1835 // Note: the correction factor depends both on GF and b, | |
| 1836 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1837 // so that can change who is the leading gas... | |
| 1838 // Note: Also depends of the GF_current... | |
| 1839 if( char_I_deco_model == 1 ) | |
| 302 | 1840 p = ( p - var_N2_a * GF_current) |
| 1841 / (GF_current / var_N2_b + 1.0 - GF_current); | |
| 192 | 1842 else |
| 1843 p = (p - var_N2_a) * var_N2_b; | |
| 237 | 1844 if( p < 0.0 ) p = 0.0; |
| 192 | 1845 |
| 1846 if( p > sim_lead_tissue_limit ) | |
| 1847 { | |
| 1848 sim_lead_tissue_no = ci; | |
| 1849 sim_lead_tissue_limit = p; | |
| 1850 } | |
| 1851 } // for ci | |
| 197 | 1852 |
| 338 | 1853 assert( sim_lead_tissue_no < NUM_COMP ); |
| 237 | 1854 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
| 167 | 1855 } |
| 116 | 1856 |
| 167 | 1857 ////////////////////////////////////////////////////////////////////////////// |
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1858 // clear_deco_table |
| 167 | 1859 // |
| 1860 // unchanged in v.101 | |
| 1861 // | |
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1862 static void clear_deco_table(void) |
| 116 | 1863 { |
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1864 overlay unsigned char x; |
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1865 |
| 338 | 1866 for(x=0; x<NUM_STOPS; ++x) |
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1867 { |
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1868 internal_deco_time [x] = 0; |
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1869 internal_deco_depth[x] = 0; |
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1870 } |
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1871 } |
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1872 |
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1873 ////////////////////////////////////////////////////////////////////////////// |
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1874 // update_deco_table |
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1875 // |
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1876 // Add 1 min to current stop. |
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1877 // |
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1878 // Inputs: |
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1879 // temp_depth_limit = stop's depth, in meters. |
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1880 // In/Out: |
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1881 // internal_deco_depth[] : depth (in metres) of each stops. |
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1882 // internal_deco_time [] : time (in minutes) of each stops. |
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1883 // |
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1884 static void update_deco_table() |
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1885 { |
| 192 | 1886 overlay unsigned char x; |
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1887 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1888 assert( temp_depth_limit > 0 ); // No stop at surface... |
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1889 |
| 338 | 1890 for(x=0; x<NUM_STOPS; ++x) |
| 192 | 1891 { |
| 212 | 1892 // Make sure deco-stops are recorded in order: |
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1893 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
| 212 | 1894 |
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1895 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
| 192 | 1896 { |
| 1897 // Do not overflow (max 255') | |
| 1898 if( internal_deco_time[x] < 255 ) | |
| 1899 { | |
| 1900 internal_deco_time[x]++; | |
| 1901 return; | |
| 1902 } | |
| 1903 // But store extra in the next stop... | |
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1904 } |
| 192 | 1905 |
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1906 if( internal_deco_depth[x] == 0 ) |
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1907 { |
| 192 | 1908 internal_deco_depth[x] = temp_depth_limit; |
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1909 if( sim_gas_delay > sim_dive_mins ) |
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1910 internal_deco_depth[x] |= 0x80; |
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1911 |
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1912 internal_deco_time[x] = 1; |
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1913 return; |
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1914 } |
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1915 } |
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1916 |
| 192 | 1917 // Can't store stops at more than 96m. |
| 1918 // Or stops at less that 3m too. | |
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1919 // Just do nothing with that... |
| 167 | 1920 } |
| 116 | 1921 |
| 167 | 1922 ////////////////////////////////////////////////////////////////////////////// |
| 1923 // calc_gradient_factor | |
| 1924 // | |
| 165 | 1925 // optimized in v.101 (var_N2_a) |
| 116 | 1926 // new code in v.102 |
| 167 | 1927 // |
| 1928 static void calc_gradient_factor(void) | |
| 116 | 1929 { |
| 197 | 1930 overlay float gf; |
| 339 | 1931 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
| 1932 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
| 237 | 1933 |
| 338 | 1934 assert( char_O_gtissue_no < NUM_COMP ); |
| 237 | 1935 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1936 |
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1937 // tissue > respiration (currently off-gasing) |
| 302 | 1938 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
| 1939 // GF = 100% when respiration == limit. | |
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1940 temp_tissue = N2 + He; |
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1941 if( temp_tissue <= pres_respiration ) |
| 197 | 1942 gf = 0.0; |
| 1943 else | |
| 1944 { | |
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1945 overlay float limit = calc_lead_tissue_limit; |
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1946 // NOTE: in GF model, calc_lead_tissue_limit include already the |
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1947 // correction due to gradient factor. To compute the actual |
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1948 // current GF, we need to (re-)compute the raw ambiant-pressure |
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1949 // limit from the Bühlmann model. |
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1950 if( char_I_deco_model == 1 ) |
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1951 { |
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1952 ci = char_O_gtissue_no; |
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1953 read_buhlmann_coefficients(); |
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1954 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1955 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1956 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1957 } |
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1958 |
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1959 gf = (temp_tissue - pres_respiration) |
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1960 / (temp_tissue - limit) |
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1961 * 100.0; |
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1962 if( gf > 254.5 ) gf = 255.0; |
| 197 | 1963 if( gf < 0.0 ) gf = 0.0; |
| 1964 } | |
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1965 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
| 116 | 1966 |
| 1967 if (char_I_deco_model == 1) // calculate relative gradient factor | |
| 1968 { | |
| 197 | 1969 overlay float rgf; |
| 1970 | |
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1971 if( low_depth < 1.5 ) |
| 197 | 1972 rgf = GF_high; |
| 1973 else | |
| 1974 { | |
| 317 | 1975 overlay float temp1 = low_depth * METER_TO_BAR; |
| 197 | 1976 overlay float temp2 = pres_respiration - pres_surface; |
| 186 | 1977 |
| 197 | 1978 if (temp2 <= 0) |
| 1979 rgf = GF_high; | |
| 1980 else if (temp2 >= temp1) | |
| 1981 rgf = GF_low; | |
| 1982 else | |
| 1983 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 1984 } | |
| 186 | 1985 |
| 197 | 1986 rgf = gf / rgf; // gf is already in percent |
| 1987 if( rgf < 0.0 ) rgf = 0.0; | |
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1988 if( rgf > 254.5 ) rgf = 255.0; |
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1989 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
| 116 | 1990 } // calc relative gradient factor |
| 1991 else | |
| 1992 { | |
| 186 | 1993 char_O_relative_gradient_GF = char_O_gradient_factor; |
| 116 | 1994 } |
| 167 | 1995 } |
| 116 | 1996 |
| 167 | 1997 ////////////////////////////////////////////////////////////////////////////// |
| 1998 // deco_calc_desaturation_time | |
| 1999 // | |
| 116 | 2000 // FIXED N2_ratio |
| 2001 // unchanged in v.101 | |
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2002 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
| 233 | 2003 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
| 167 | 2004 // |
| 116 | 2005 void deco_calc_desaturation_time(void) |
| 2006 { | |
| 338 | 2007 overlay rom const float *ptr; |
| 2008 | |
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2009 RESET_C_STACK |
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2010 |
| 233 | 2011 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 2012 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 2013 | |
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2014 #ifndef CROSS_COMPILE |
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2015 // Note: we don't use far rom pointer, because the |
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2016 // 24 bits is to complex, hence we have to set |
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2017 // the UPPER page ourself... |
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2018 // --> Set zero if tables are moved to lower pages ! |
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2019 _asm |
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2020 movlw 1 |
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2021 movwf TBLPTRU,0 |
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2022 _endasm |
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2023 #endif |
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2024 |
| 237 | 2025 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
| 233 | 2026 pres_surface = int_I_pres_surface * 0.001; |
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2027 ppN2 = N2_ratio * (pres_surface - ppWater); |
| 126 | 2028 int_O_desaturation_time = 0; |
| 2029 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) | |
| 233 | 2030 |
| 338 | 2031 ptr = &buhlmann_ht[0]; |
| 339 | 2032 for(ci=0; ci<NUM_COMP; ci++) |
| 126 | 2033 { |
| 338 | 2034 overlay float var_N2_halftime = *ptr++; |
| 2035 overlay float var_He_halftime = *ptr++; | |
| 251 | 2036 overlay unsigned short desat_time; // For a particular compartiment, in min. |
| 2037 overlay float temp1; | |
| 2038 overlay float temp2; | |
| 2039 overlay float temp3; | |
| 2040 overlay float temp4; | |
| 338 | 2041 |
| 2042 assert( 4.0 <= var_N2_halftime && var_N2_halftime <= 635.0 ); | |
| 2043 assert( 1.5099 <= var_He_halftime && var_He_halftime <= 240.03 ); | |
| 2044 | |
| 126 | 2045 // saturation_time (for flight) and N2_saturation in multiples of halftime |
| 2046 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 2047 // 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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2048 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
| 126 | 2049 // N2 |
| 339 | 2050 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
| 2051 temp2 = ppN2 - pres_tissue_N2[ci]; | |
| 126 | 2052 if (temp2 >= 0.0) |
| 2053 { | |
| 233 | 2054 temp1 = 0.0; |
| 2055 temp2 = 0.0; | |
| 126 | 2056 } |
| 2057 else | |
| 2058 temp1 = temp1 / temp2; | |
| 251 | 2059 if( 0.0 < temp1 && temp1 < 1.0 ) |
| 126 | 2060 { |
|
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2061 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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2062 // minus because log is negative. |
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2063 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
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2064 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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2065 |
| 126 | 2066 } |
| 2067 else | |
| 2068 { | |
| 233 | 2069 temp1 = 0.0; |
| 2070 temp2 = 0.0; | |
| 126 | 2071 } |
| 116 | 2072 |
| 126 | 2073 // He |
| 339 | 2074 temp3 = 0.1 - pres_tissue_He[ci]; |
| 126 | 2075 if (temp3 >= 0.0) |
| 2076 { | |
| 233 | 2077 temp3 = 0.0; |
| 2078 temp4 = 0.0; | |
| 126 | 2079 } |
| 2080 else | |
| 339 | 2081 temp3 = - temp3 / pres_tissue_He[ci]; |
| 251 | 2082 if( 0.0 < temp3 && temp3 < 1.0 ) |
| 126 | 2083 { |
|
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2084 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
| 126 | 2085 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
| 2086 // minus because log is negative | |
| 165 | 2087 temp4 = var_He_halftime * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
| 126 | 2088 } |
| 2089 else | |
| 2090 { | |
| 233 | 2091 temp3 = 0.0; |
| 2092 temp4 = 0.0; | |
| 126 | 2093 } |
| 116 | 2094 |
| 126 | 2095 // saturation_time (for flight) |
| 2096 if (temp4 > temp2) | |
| 203 | 2097 desat_time = (unsigned short)temp4; |
| 126 | 2098 else |
| 203 | 2099 desat_time = (unsigned short)temp2; |
| 252 | 2100 |
| 251 | 2101 if(desat_time > int_O_desaturation_time) |
| 2102 int_O_desaturation_time = desat_time; | |
| 116 | 2103 |
| 126 | 2104 // N2 saturation in multiples of halftime for display purposes |
| 339 | 2105 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 2106 temp2 = temp2 + 80.0; // set center | |
| 126 | 2107 if (temp2 < 0.0) |
| 2108 temp2 = 0.0; | |
| 2109 if (temp2 > 255.0) | |
| 2110 temp2 = 255.0; | |
| 339 | 2111 char_O_tissue_N2_saturation[ci] = (char)temp2; |
| 233 | 2112 |
| 126 | 2113 // He saturation in multiples of halftime for display purposes |
| 339 | 2114 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
| 2115 temp4 = temp4 + 80.0; // set center | |
| 126 | 2116 if (temp4 < 0.0) |
| 2117 temp4 = 0.0; | |
| 2118 if (temp4 > 255.0) | |
| 2119 temp4 = 255.0; | |
| 339 | 2120 char_O_tissue_He_saturation[ci] = (char)temp4; |
| 126 | 2121 } // for |
| 167 | 2122 } |
| 116 | 2123 |
| 167 | 2124 ////////////////////////////////////////////////////////////////////////////// |
| 2125 // calc_wo_deco_step_1_min | |
| 2126 // | |
| 116 | 2127 // FIXED N2 Ratio |
| 2128 // optimized in v.101 (...saturation_multiplier) | |
| 2129 // desaturation slowed down to 70,42% | |
| 167 | 2130 // |
| 2131 static void calc_wo_deco_step_1_min(void) | |
| 116 | 2132 { |
| 251 | 2133 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 2134 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
| 2135 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
| 2136 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 2137 | |
| 116 | 2138 if(flag_in_divemode) |
| 2139 { | |
| 2140 flag_in_divemode = 0; | |
| 2141 set_dbg_end_of_dive(); | |
| 2142 } | |
|
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2143 |
| 126 | 2144 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
| 233 | 2145 pres_respiration = int_I_pres_respiration * 0.001; // assembler code uses different digit system |
| 2146 pres_surface = int_I_pres_surface * 0.001; // the b"uhlmann formula using pres_surface does not use the N2_ratio | |
|
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2147 ppN2 = N2_ratio * (pres_respiration - ppWater); // ppWater is the extra pressure in the body |
| 200 | 2148 ppHe = 0.0; |
| 126 | 2149 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) |
| 197 | 2150 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 126 | 2151 |
| 339 | 2152 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
| 167 | 2153 |
|
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2154 clear_deco_table(); |
| 200 | 2155 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
| 126 | 2156 char_O_nullzeit = 0; |
| 168 | 2157 int_O_ascenttime = 0; |
| 323 | 2158 int_O_extra_ascenttime = 0; |
| 126 | 2159 calc_gradient_factor(); |
| 167 | 2160 } |
| 126 | 2161 |
| 167 | 2162 ////////////////////////////////////////////////////////////////////////////// |
| 2163 ////////////////////////////////////////////////////////////////////////////// | |
| 2164 ////////////////////////////////// deco_hash ///////////////////////////////// | |
| 2165 ////////////////////////////////////////////////////////////////////////////// | |
| 2166 ////////////////////////////////////////////////////////////////////////////// | |
| 126 | 2167 |
| 184 | 2168 #ifndef CROSS_COMPILE |
| 116 | 2169 void deco_hash(void) |
| 2170 { | |
| 167 | 2171 overlay unsigned char md_i, md_j; // Loop index. |
| 2172 overlay unsigned char md_t; | |
| 2173 overlay unsigned char md_buffer[16]; | |
| 2174 overlay unsigned char md_temp; | |
| 203 | 2175 overlay unsigned short md_pointer; |
| 167 | 2176 |
|
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2177 RESET_C_STACK |
| 126 | 2178 |
| 2179 // init | |
| 164 | 2180 for(md_i=0;md_i<16;md_i++) |
| 126 | 2181 { |
| 2182 md_state[md_i] = 0; | |
| 164 | 2183 char_O_hash[md_i] = 0; |
| 126 | 2184 } // for md_i 16 |
| 116 | 2185 |
| 126 | 2186 _asm |
| 167 | 2187 movlw 0x01 // md_pi address. |
| 2188 movwf TBLPTRU,0 | |
| 2189 movlw 0x7E | |
| 2190 movwf TBLPTRH,0 | |
| 2191 movlw 0x00 | |
| 2192 movwf TBLPTRL,0 | |
| 126 | 2193 _endasm; |
| 165 | 2194 md_i = 0; |
| 2195 do { | |
| 126 | 2196 _asm |
| 2197 TBLRDPOSTINC | |
| 2198 movff TABLAT,md_temp | |
| 2199 _endasm | |
| 165 | 2200 md_pi_subst[md_i++] = md_temp; |
| 2201 } while( md_i != 0 ); | |
| 2202 | |
| 126 | 2203 _asm |
| 167 | 2204 movlw 0x00 |
| 2205 movwf TBLPTRU,0 | |
| 2206 movlw 0x00 | |
| 2207 movwf TBLPTRH,0 | |
| 2208 movlw 0x00 | |
| 2209 movwf TBLPTRL,0 | |
| 126 | 2210 _endasm |
| 167 | 2211 |
| 126 | 2212 // cycle buffers |
| 2213 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
| 2214 { | |
| 2215 md_t = 0; | |
| 2216 for (md_i=0;md_i<16;md_i++) | |
| 2217 { | |
| 2218 if(md_pointer == 9) | |
| 164 | 2219 md_temp = char_O_hash[md_i]; |
| 126 | 2220 else |
| 2221 { | |
| 2222 _asm | |
| 167 | 2223 TBLRDPOSTINC |
| 2224 movff TABLAT,md_temp | |
| 126 | 2225 _endasm |
| 2226 } // else | |
| 167 | 2227 |
| 2228 md_buffer[md_i] = md_temp; | |
| 186 | 2229 md_state[md_i+16] = md_temp; |
| 2230 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
| 126 | 2231 } // for md_i 16 |
| 2232 | |
| 2233 for (md_i=0;md_i<18;md_i++) | |
| 2234 { | |
| 2235 for (md_j=0;md_j<48;md_j++) | |
| 2236 { | |
| 167 | 2237 md_state[md_j] ^= md_pi_subst[md_t]; |
| 126 | 2238 md_t = md_state[md_j]; |
| 2239 } // for md_j 48 | |
| 2240 md_t = (unsigned char)(md_t+1); | |
| 2241 } // for md_i 18 | |
| 164 | 2242 md_t = char_O_hash[15]; |
| 126 | 2243 |
| 2244 for (md_i=0;md_i<16;md_i++) | |
| 2245 { | |
| 167 | 2246 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
| 164 | 2247 md_t = char_O_hash[md_i]; |
| 126 | 2248 } // for md_i 16 |
| 2249 } // for md_pointer | |
| 116 | 2250 } // void deco_hash(void) |
| 184 | 2251 #endif |
| 116 | 2252 |
| 167 | 2253 ////////////////////////////////////////////////////////////////////////////// |
| 2254 // deco_clear_CNS_fraction | |
| 2255 // | |
| 116 | 2256 // new in v.101 |
| 167 | 2257 // |
| 116 | 2258 void deco_clear_CNS_fraction(void) |
| 2259 { | |
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2260 RESET_C_STACK |
| 237 | 2261 |
| 126 | 2262 CNS_fraction = 0.0; |
| 2263 char_O_CNS_fraction = 0; | |
| 167 | 2264 } |
| 116 | 2265 |
| 167 | 2266 ////////////////////////////////////////////////////////////////////////////// |
| 2267 // deco_calc_CNS_fraction | |
| 2268 // | |
| 116 | 2269 // new in v.101 |
| 2270 // optimized in v.102 : with new variables char_I_actual_ppO2 and actual_ppO2 | |
| 167 | 2271 // |
| 116 | 2272 // Input: char_I_actual_ppO2 |
| 292 | 2273 // char_I_step_is_1min : use 1min steps instead of 2sec. |
| 116 | 2274 // Output: char_O_CNS_fraction |
| 2275 // Uses and Updates: CNS_fraction | |
| 2276 // Uses: acutal_ppO2 | |
| 167 | 2277 // |
| 116 | 2278 void deco_calc_CNS_fraction(void) |
| 2279 { | |
| 167 | 2280 overlay float actual_ppO2; |
| 292 | 2281 overlay float time_factor = 1.0f; |
| 126 | 2282 RESET_C_STACK |
| 167 | 2283 |
| 237 | 2284 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.5 ); |
| 2285 assert( char_I_actual_ppO2 > 15 ); | |
| 2286 | |
| 126 | 2287 actual_ppO2 = (float)char_I_actual_ppO2 / 100.0; |
| 292 | 2288 if( char_I_step_is_1min ) |
| 2289 time_factor = 30.0f; | |
| 116 | 2290 |
| 126 | 2291 if (char_I_actual_ppO2 < 50) |
| 292 | 2292 ; // no changes |
| 126 | 2293 else if (char_I_actual_ppO2 < 60) |
| 292 | 2294 CNS_fraction += time_factor/(-54000.0 * actual_ppO2 + 54000.0); |
| 126 | 2295 else if (char_I_actual_ppO2 < 70) |
| 292 | 2296 CNS_fraction += time_factor/(-45000.0 * actual_ppO2 + 48600.0); |
| 126 | 2297 else if (char_I_actual_ppO2 < 80) |
| 292 | 2298 CNS_fraction += time_factor/(-36000.0 * actual_ppO2 + 42300.0); |
| 126 | 2299 else if (char_I_actual_ppO2 < 90) |
| 292 | 2300 CNS_fraction += time_factor/(-27000.0 * actual_ppO2 + 35100.0); |
| 126 | 2301 else if (char_I_actual_ppO2 < 110) |
| 292 | 2302 CNS_fraction += time_factor/(-18000.0 * actual_ppO2 + 27000.0); |
| 126 | 2303 else if (char_I_actual_ppO2 < 150) |
| 292 | 2304 CNS_fraction += time_factor/(-9000.0 * actual_ppO2 + 17100.0); |
| 126 | 2305 else if (char_I_actual_ppO2 < 160) |
| 292 | 2306 CNS_fraction += time_factor/(-22500.0 * actual_ppO2 + 37350.0); |
| 126 | 2307 else if (char_I_actual_ppO2 < 165) |
| 292 | 2308 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 | 2309 else if (char_I_actual_ppO2 < 170) |
| 292 | 2310 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
| 126 | 2311 else if (char_I_actual_ppO2 < 175) |
| 292 | 2312 CNS_fraction += time_factor*0.00136; |
| 126 | 2313 else if (char_I_actual_ppO2 < 180) |
| 292 | 2314 CNS_fraction += time_factor*0.00180; |
| 126 | 2315 else if (char_I_actual_ppO2 < 185) |
| 292 | 2316 CNS_fraction += time_factor*0.00237; |
| 126 | 2317 else if (char_I_actual_ppO2 < 190) |
| 292 | 2318 CNS_fraction += time_factor*0.00310; |
| 126 | 2319 else if (char_I_actual_ppO2 < 195) |
| 292 | 2320 CNS_fraction += time_factor*0.00401; |
| 126 | 2321 else if (char_I_actual_ppO2 < 200) |
| 292 | 2322 CNS_fraction += time_factor*0.00517; |
| 126 | 2323 else if (char_I_actual_ppO2 < 230) |
| 292 | 2324 CNS_fraction += time_factor*0.0209; |
| 126 | 2325 else |
| 292 | 2326 CNS_fraction += time_factor*0.0482; // value for 2.5 |
| 116 | 2327 |
| 126 | 2328 if (CNS_fraction > 2.5) |
| 2329 CNS_fraction = 2.5; | |
| 2330 if (CNS_fraction < 0.0) | |
| 2331 CNS_fraction = 0.0; | |
| 2332 | |
| 2333 char_O_CNS_fraction = (char)((CNS_fraction + 0.005)* 100.0); | |
| 167 | 2334 } |
| 116 | 2335 |
| 167 | 2336 ////////////////////////////////////////////////////////////////////////////// |
| 2337 // deco_calc_CNS_decrease_15min | |
| 2338 // | |
| 116 | 2339 // new in v.101 |
| 167 | 2340 // |
| 116 | 2341 // calculates the half time of 90 minutes in 6 steps of 15 min |
| 200 | 2342 // (Used in sleepmode, for low battery mode). |
| 167 | 2343 // |
| 116 | 2344 // Output: char_O_CNS_fraction |
| 2345 // Uses and Updates: CNS_fraction | |
| 167 | 2346 // |
| 116 | 2347 void deco_calc_CNS_decrease_15min(void) |
| 2348 { | |
| 237 | 2349 RESET_C_STACK |
| 2350 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.5 ); | |
| 2351 | |
| 126 | 2352 CNS_fraction = 0.890899 * CNS_fraction; |
| 167 | 2353 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); |
| 2354 } | |
| 116 | 2355 |
| 167 | 2356 ////////////////////////////////////////////////////////////////////////////// |
| 2357 // deco_calc_percentage | |
| 2358 // | |
| 116 | 2359 // new in v.101 |
| 167 | 2360 // |
| 116 | 2361 // calculates int_I_temp * char_I_temp / 100 |
| 2362 // output is int_I_temp | |
| 200 | 2363 // |
| 2364 // Used to compute NoFly remaining time. | |
|
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2365 // |
| 116 | 2366 void deco_calc_percentage(void) |
| 2367 { | |
|
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2368 RESET_C_STACK |
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2369 |
| 237 | 2370 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
| 2371 assert( 0 <= int_I_temp && int_I_temp < 2880 ); // Less than 48h... | |
| 2372 | |
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2373 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
| 237 | 2374 |
| 302 | 2375 assert( int_I_temp < 2880 ); // Less than 48h... |
|
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2376 } |
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2377 |
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2378 |
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2379 ////////////////////////////////////////////////////////////////////////////// |
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2380 // deco_gas_volumes |
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2381 // |
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2382 // new in v.111 |
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2383 // |
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2384 // calculates volumes for each gas. |
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2385 // |
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2386 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
|
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2387 // Gas list. |
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2388 // char_I_first_gas is the bottom gas. |
|
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2389 // decoplan (char_O_deco_depth, char_O_deco_time). |
|
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2390 // CF#54 == TRUE if shallowest stop first. |
|
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2391 // CF#56 == bottom deci-liters/minutes (0.5 .. 50.0) or bar/min. |
|
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2392 // CF#57 == deco deci-liters/minutes (0.5 .. 50.0) or bar/min. |
| 224 | 2393 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
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2394 // |
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2395 void deco_gas_volumes(void) |
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2396 { |
| 338 | 2397 overlay float volumes[NUM_GAS]; |
| 265 | 2398 overlay float bottom_usage, ascent_usage; |
|
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2399 overlay unsigned char i, deepest_first; |
| 241 | 2400 overlay unsigned char gas; |
|
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2401 RESET_C_STACK |
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2402 |
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2403 //---- initialize with bottom consumption -------------------------------- |
| 338 | 2404 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
|
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2405 volumes[i] = 0.0; |
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2406 |
| 338 | 2407 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
| 241 | 2408 gas = char_I_first_gas - 1; |
| 2409 | |
| 265 | 2410 bottom_usage = read_custom_function(56) * 0.1; |
| 2411 if( bottom_usage > 0.0 ) | |
| 2412 volumes[gas] | |
| 2413 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
| 2414 * char_I_bottom_time // in minutes. | |
| 2415 * bottom_usage; // In liter/minutes. | |
| 2416 else | |
| 2417 volumes[gas] = 65535.0; | |
|
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2418 |
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2419 //---- Ascent usage ------------------------------------------------------ |
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2420 |
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2421 deepest_first = read_custom_function(54) == 0; |
|
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2422 ascent_usage = read_custom_function(57) * 0.1; // In liter/minutes. |
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2423 |
| 224 | 2424 // Usage up to the first stop: |
| 2425 // - computed at MAX depth (easier, safer), | |
|
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2426 // - with an ascent speed of 10m/min. |
| 224 | 2427 // - with ascent litter / minutes. |
|
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2428 // - still using bottom gas: |
| 265 | 2429 if( ascent_usage > 0.0 ) |
| 2430 volumes[gas] | |
| 2431 += (char_I_bottom_depth*0.1 + 1.0) // Depth -> bar | |
| 2432 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 // ascent time (min) | |
| 2433 * ascent_usage; // Consumption ( xxx / min @ 1 bar) | |
| 2434 else | |
| 2435 volumes[gas] = 65535.0; | |
|
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2436 |
| 338 | 2437 for(i=0; i<NUM_STOPS; ++i) |
|
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2438 { |
| 241 | 2439 overlay unsigned char j; |
|
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2440 overlay unsigned char depth, time, ascent; |
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2441 |
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2442 // Manage stops in reverse order (CF#54) |
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2443 if( deepest_first ) |
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2444 { |
| 241 | 2445 time = char_O_deco_time[i]; |
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2446 if( time == 0 ) break; // End of table: done. |
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2447 |
|
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2448 ascent = depth = char_O_deco_depth[i] & 0x7F; |
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2449 if( i < 31 ) |
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2450 ascent -= char_O_deco_depth[i+1] & 0x7F; |
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2451 } |
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2452 else |
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2453 { |
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2454 time = char_O_deco_time[31-i]; |
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2455 if( time == 0 ) continue; // not yet: still searh table. |
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2456 |
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2457 ascent = depth = char_O_deco_depth[31-i] & 0x7F; |
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2458 if( i < 31 ) |
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2459 ascent -= char_O_deco_depth[30-i] & 0x7F; |
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2460 } |
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2461 |
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2462 // Gas switch depth ? |
| 338 | 2463 for(j=0; j<NUM_GAS; ++j) |
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2464 { |
|
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2465 if( depth <= char_I_deco_gas_change[j] ) |
| 241 | 2466 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
| 224 | 2467 gas = j; |
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2468 } |
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2469 |
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2470 // usage during stop: |
| 224 | 2471 // Note: because first gas is not in there, increment gas+1 |
| 265 | 2472 if( ascent_usage > 0.0 ) |
| 2473 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. | |
| 2474 * time // in minutes. | |
| 2475 * ascent_usage // in xxx / min @ 1bar. | |
| 2476 // Plus usage during ascent to the next stop, at 10m/min. | |
| 2477 + (depth*0.1 + 1.0) | |
|
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2478 * ascent*0.1 // metre --> min |
| 265 | 2479 * ascent_usage; |
| 2480 else | |
| 2481 volumes[gas] = 65535.0; | |
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2482 } |
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2483 |
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2484 //---- convert results for the ASM interface ----------------------------- |
| 338 | 2485 for(i=0; i<NUM_GAS; ++i) |
| 224 | 2486 if( volumes[i] > 6553.4 ) |
| 2487 int_O_gas_volumes[i] = 65535; | |
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2488 else |
| 224 | 2489 int_O_gas_volumes[i] = (unsigned short)(volumes[i]*10.0 + 0.5); |
| 116 | 2490 } |
| 2491 | |
| 167 | 2492 ////////////////////////////////////////////////////////////////////////////// |
| 2493 | |
| 116 | 2494 void deco_push_tissues_to_vault(void) |
| 2495 { | |
| 167 | 2496 overlay unsigned char x; |
|
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2497 RESET_C_STACK |
| 167 | 2498 |
| 116 | 2499 cns_vault = CNS_fraction; |
| 339 | 2500 for (x=0;x<NUM_COMP;x++) |
| 2501 { | |
| 2502 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
| 2503 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
| 2504 } | |
| 116 | 2505 } |
| 167 | 2506 |
| 116 | 2507 void deco_pull_tissues_from_vault(void) |
| 2508 { | |
| 167 | 2509 overlay unsigned char x; |
|
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2510 RESET_C_STACK |
| 167 | 2511 |
| 339 | 2512 for (x=0; x<NUM_COMP; x++) |
| 2513 { | |
| 2514 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
| 2515 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
| 2516 } | |
| 292 | 2517 |
| 2518 // Restore both CNS variable, too. | |
| 2519 CNS_fraction = cns_vault; | |
| 2520 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); | |
| 116 | 2521 } |
| 2522 | |
| 167 | 2523 ////////////////////////////////////////////////////////////////////////////// |
| 2524 // | |
| 184 | 2525 #ifndef CROSS_COMPILE |
| 2526 void main() {} | |
| 2527 #endif |