Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 307:5bc3467fc421
New live EAD/END in divemode (both OCR and CCR).
| author | JeanDo |
|---|---|
| date | Sun, 01 May 2011 03:35:42 +0200 |
| parents | 36cc8f0c1d73 |
| children | b20fc8c4ac92 |
| 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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75 // 2011/04/10: [jDG] Use timer TMR3 to limit loops in calc_hauptroutine_calc_deco(). |
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76 // 2011/04/15: [jDG] Store low_depth in 32bits (w/o rounding), for a better stability. |
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77 // 2011/04/25: [jDG] Added 1mn mode for CNS calculation, to allow it for decoplanning. |
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78 // 2011/04/27: [jDG] Fixed char_O_gradient_factor calculation when model uses gradient-factor. |
| 116 | 79 // |
| 167 | 80 // TODO: |
| 81 // + Allow to abort MD2 calculation (have to restart next time). | |
| 82 // | |
| 83 // Literature: | |
| 200 | 84 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
| 116 | 85 // 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 |
| 86 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
| 87 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
| 88 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
| 89 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
| 167 | 90 // |
| 91 // | |
| 116 | 92 |
| 93 // ********************* | |
| 94 // ** I N C L U D E S ** | |
| 95 // ********************* | |
| 96 #include <math.h> | |
| 167 | 97 |
| 192 | 98 // *********************************************** |
| 99 // ** V A R I A B L E S D E F I N I T I O N S ** | |
| 100 // *********************************************** | |
| 101 | |
| 102 #include "p2_definitions.h" | |
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103 #define TEST_MAIN |
| 192 | 104 #include "shared_definitions.h" |
| 105 | |
| 200 | 106 // Water vapour partial pressure in the lumb. |
| 233 | 107 #define ppWVapour 0.0627 |
| 200 | 108 |
| 167 | 109 // ************************* |
| 110 // ** P R O T O T Y P E S ** | |
| 111 // ************************* | |
| 112 | |
| 113 static void calc_hauptroutine(void); | |
| 114 static void calc_nullzeit(void); | |
| 115 | |
| 192 | 116 static void calc_tissue(PARAMETER unsigned char period); |
| 258 | 117 static void calc_limit(void); |
| 192 | 118 |
| 167 | 119 static void clear_tissue(void); |
| 120 static void calc_ascenttime(void); | |
| 121 static void update_startvalues(void); | |
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122 static void clear_deco_table(void); |
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123 static void update_deco_table(void); |
| 192 | 124 |
| 125 static void backup_sim_pres_tissue(void); | |
| 126 static void restore_sim_pres_tissue(void); | |
| 127 static void sim_tissue(PARAMETER unsigned char period); | |
| 128 static void sim_limit(PARAMETER float GF_current); | |
| 167 | 129 static void calc_gradient_factor(void); |
| 130 static void calc_wo_deco_step_1_min(void); | |
| 131 | |
| 132 static void calc_hauptroutine_data_input(void); | |
| 133 static void calc_hauptroutine_update_tissues(void); | |
| 134 static void calc_hauptroutine_calc_deco(void); | |
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135 static void sim_ascent_to_first_stop(void); |
| 167 | 136 |
| 241 | 137 static unsigned char gas_switch_deepest(void); |
| 138 static void gas_switch_set(void); | |
| 217 | 139 |
| 241 | 140 static unsigned char calc_nextdecodepth(void); |
| 116 | 141 |
| 200 | 142 //---- Bank 4 parameters ----------------------------------------------------- |
| 163 | 143 #pragma udata bank4=0x400 |
| 116 | 144 |
| 145 static float temp_limit; | |
| 146 static float GF_low; | |
| 147 static float GF_high; | |
| 148 static float GF_delta; | |
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149 static float low_depth; // Depth of deepest stop |
| 192 | 150 static float locked_GF_step; // GF_delta / low_depth |
| 151 | |
| 152 static unsigned char temp_depth_limit; | |
| 171 | 153 |
| 192 | 154 // Simulation context: used to predict ascent. |
| 155 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 156 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 116 | 157 |
| 192 | 158 // Real context: what we are doing now. |
| 159 static float calc_lead_tissue_limit; // | |
| 116 | 160 |
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161 static unsigned char internal_deco_time[32]; |
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162 static unsigned char internal_deco_depth[32]; |
| 116 | 163 |
| 164 static float cns_vault; | |
| 165 static float pres_tissue_vault[32]; | |
| 166 | |
| 163 | 167 //---- Bank 5 parameters ----------------------------------------------------- |
| 168 #pragma udata bank5=0x500 | |
| 169 | |
| 167 | 170 static unsigned char ci; |
| 116 | 171 static float pres_respiration; |
| 172 static float pres_surface; | |
| 173 static float temp_deco; | |
| 236 | 174 static float ppN2; |
| 200 | 175 static float ppHe; |
| 116 | 176 static float temp_tissue; |
| 200 | 177 static float N2_ratio; // Breathed gas nitrogen ratio. |
| 178 static float He_ratio; // Breathed gas helium ratio. | |
| 179 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
| 180 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
| 181 static float var_He_a; // Bühlmann a, for current He tissue. | |
| 182 static float var_He_b; // Bühlmann b, for current He tissue. | |
| 183 static float var_N2_e; // Exposition, for current N2 tissue. | |
| 184 static float var_He_e; // Exposition, for current He tissue. | |
| 116 | 185 |
| 164 | 186 static float pres_diluent; // new in v.101 |
| 187 static float const_ppO2; // new in v.101 | |
| 188 static float deco_ppO2_change; // new in v.101 | |
| 189 static float deco_ppO2; // new in v.101 | |
| 116 | 190 |
| 241 | 191 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
| 192 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
| 203 | 193 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
| 194 static unsigned short sim_dive_mins; // Simulated dive time. | |
| 200 | 195 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
| 196 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
| 197 static float CNS_fraction; // new in v.101 | |
| 198 static float float_saturation_multiplier; // new in v.101 | |
| 199 static float float_desaturation_multiplier; // new in v.101 | |
| 167 | 200 static float float_deco_distance; // new in v.101 |
| 201 static char flag_in_divemode; // new in v.108 | |
| 202 | |
| 225 | 203 static unsigned char deco_gas_change[5]; // new in v.109 |
| 167 | 204 |
| 163 | 205 //---- Bank 6 parameters ----------------------------------------------------- |
| 206 #pragma udata bank6=0x600 | |
| 116 | 207 |
| 197 | 208 float pres_tissue[32]; |
| 116 | 209 |
| 163 | 210 //---- Bank 7 parameters ----------------------------------------------------- |
| 211 #pragma udata bank7=0x700 | |
| 212 | |
| 197 | 213 float sim_pres_tissue[32]; // 32 floats = 128 bytes. |
| 116 | 214 static float sim_pres_tissue_backup[32]; |
| 215 | |
| 163 | 216 //---- Bank 8 parameters ----------------------------------------------------- |
| 116 | 217 #pragma udata bank8=0x800 |
| 163 | 218 |
| 116 | 219 static char md_pi_subst[256]; |
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220 #define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
| 116 | 221 |
| 163 | 222 //---- Bank 9 parameters ----------------------------------------------------- |
| 167 | 223 #pragma udata bank9=0x900 |
| 116 | 224 |
| 163 | 225 static char md_state[48]; // DONT MOVE !! // has to be at the beginning of bank 9 for the asm code!!! |
| 116 | 226 |
| 164 | 227 // internal, dbg: |
| 167 | 228 static unsigned char DBG_char_I_deco_model; // new in v.108. |
| 164 | 229 static unsigned char DBG_char_I_depth_last_deco; // new in v.108 |
| 212 | 230 static unsigned char DBG_deco_gas_change; // new in v.108 |
| 224 | 231 static unsigned char DBG_deco_N2_ratio; // new in v.108 |
| 232 static unsigned char DBG_deco_He_ratio; // new in v.108 | |
| 164 | 233 static float DBG_pres_surface; // new in v.108 |
| 234 static float DBG_GF_low; // new in v.108 | |
| 235 static float DBG_GF_high; // new in v.108 | |
| 236 static float DBG_const_ppO2; // new in v.108 | |
| 237 static float DBG_deco_ppO2_change; // new in v.108 | |
| 238 static float DBG_deco_ppO2; // new in v.108 | |
| 239 static float DBG_float_saturation_multiplier; // new in v.108 | |
| 240 static float DBG_float_desaturation_multiplier; // new in v.108 | |
| 241 static float DBG_float_deco_distance; // new in v.108 | |
| 242 static float DBG_N2_ratio; // new in v.108 | |
| 243 static float DBG_He_ratio; // new in v.108 | |
| 244 | |
| 167 | 245 ////////////////////////////////////////////////////////////////////////////// |
| 246 ////////////////////////////////////////////////////////////////////////////// | |
| 247 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 248 ////////////////////////////////////////////////////////////////////////////// | |
| 249 ////////////////////////////////////////////////////////////////////////////// | |
| 250 // | |
| 251 // End of PROM code is 17F00, So push tables on PROM top... | |
| 252 // | |
| 253 #pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. | |
| 254 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) | |
| 116 | 255 |
| 167 | 256 // Magic table to compute the MD2 HASH |
| 257 // | |
| 258 #pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... | |
| 203 | 259 rom const rom unsigned short md_pi[] = |
| 116 | 260 { |
| 261 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 | |
| 262 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA | |
| 263 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 | |
| 264 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A | |
| 265 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 | |
| 266 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 | |
| 267 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 | |
| 268 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 | |
| 269 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 | |
| 270 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F | |
| 271 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 | |
| 272 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 | |
| 273 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A | |
| 274 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 | |
| 275 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A | |
| 276 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 | |
| 277 }; | |
| 278 | |
| 167 | 279 ////////////////////////////////////////////////////////////////////////////// |
| 280 ////////////////////////////////////////////////////////////////////////////// | |
| 281 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 282 ////////////////////////////////////////////////////////////////////////////// | |
| 283 ////////////////////////////////////////////////////////////////////////////// | |
| 284 // | |
| 116 | 285 // all new in v.102 |
| 286 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 287 | |
| 288 #pragma code p2_deco = 0x0C000 | |
| 289 | |
| 167 | 290 ////////////////////////////////////////////////////////////////////////////// |
| 291 // DBS - debug on start of dive | |
| 292 // | |
| 293 static void create_dbs_set_dbg_and_ndl20mtr(void) | |
| 116 | 294 { |
| 167 | 295 overlay char i; // Local loop index. |
| 296 | |
| 297 //---- Reset DEBUG bit fields -------------------------------------------- | |
| 116 | 298 int_O_DBS_bitfield = 0; |
| 299 int_O_DBS2_bitfield = 0; | |
| 300 if(int_O_DBG_pre_bitfield & DBG_RUN) | |
| 301 int_O_DBG_pre_bitfield = DBG_RESTART; | |
| 302 else | |
| 303 int_O_DBG_pre_bitfield = DBG_RUN; | |
| 304 int_O_DBG_post_bitfield = 0; | |
| 167 | 305 |
| 306 //---- Set 20meters ND limit --------------------------------------------- | |
| 116 | 307 char_O_NDL_at_20mtr = 255; |
| 308 | |
| 167 | 309 //---- Copy all dive parameters ------------------------------------------ |
| 116 | 310 DBG_N2_ratio = N2_ratio; |
| 311 DBG_He_ratio = He_ratio; | |
| 312 DBG_char_I_deco_model = char_I_deco_model; | |
| 313 DBG_char_I_depth_last_deco = char_I_depth_last_deco; | |
| 314 DBG_pres_surface = pres_surface; | |
| 315 DBG_GF_low = GF_low; | |
| 316 DBG_GF_high = GF_high; | |
| 317 DBG_const_ppO2 = const_ppO2; | |
| 318 DBG_deco_ppO2_change = deco_ppO2_change; | |
| 319 DBG_deco_ppO2 = deco_ppO2; | |
| 224 | 320 DBG_deco_N2_ratio = char_I_deco_N2_ratio[0]; |
| 321 DBG_deco_He_ratio = char_I_deco_He_ratio[0]; | |
| 225 | 322 DBG_deco_gas_change = deco_gas_change[0]; |
| 116 | 323 DBG_float_saturation_multiplier = float_saturation_multiplier; |
| 324 DBG_float_desaturation_multiplier = float_desaturation_multiplier; | |
| 325 DBG_float_deco_distance = float_deco_distance; | |
| 326 | |
| 167 | 327 //---- Setup some error (?) conditions ----------------------------------- |
| 116 | 328 if(char_I_deco_model) |
| 329 int_O_DBS_bitfield |= DBS_mode; | |
| 330 if(const_ppO2) | |
| 331 int_O_DBS_bitfield |= DBS_ppO2; | |
| 167 | 332 for(i = 16; i < 32; i++) |
| 333 if(pres_tissue[i]) | |
| 116 | 334 int_O_DBS_bitfield |= DBS_HE_sat; |
| 335 if(deco_ppO2_change) | |
| 336 int_O_DBS_bitfield |= DBS_ppO2chg; | |
| 337 if(float_saturation_multiplier < 0.99) | |
| 338 int_O_DBS_bitfield |= DBS_SAT2l; | |
| 339 if(float_saturation_multiplier > 1.3) | |
| 340 int_O_DBS_bitfield |= DBS_SAT2h; | |
| 341 if(GF_low < 0.19) | |
| 342 int_O_DBS_bitfield |= DBS_GFLOW2l; | |
| 343 if(GF_low > 1.01) | |
| 344 int_O_DBS_bitfield |= DBS_GFLOW2h; | |
| 345 if(GF_high < 0.6) | |
| 346 int_O_DBS_bitfield |= DBS_GFHGH2l; | |
| 347 if(GF_high > 1.01) | |
| 348 int_O_DBS_bitfield |= DBS_GFHGH2h; | |
| 349 if((N2_ratio + He_ratio) > 0.95) | |
| 350 int_O_DBS_bitfield |= DBS_GASO22l; | |
| 351 if((N2_ratio + He_ratio) < 0.05) | |
| 352 int_O_DBS_bitfield |= DBS_GASO22h; | |
| 353 if(float_deco_distance > 0.25) | |
| 354 int_O_DBS_bitfield |= DBS_DIST2h; | |
| 355 if(char_I_depth_last_deco > 8) | |
| 356 int_O_DBS_bitfield |= DBS_LAST2h; | |
| 224 | 357 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) > 95)) |
| 116 | 358 int_O_DBS_bitfield |= DBS_DECOO2l; |
| 224 | 359 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) < 5)) |
| 116 | 360 int_O_DBS_bitfield |= DBS_DECOO2h; |
| 361 if(pres_respiration > 3.0) | |
| 362 int_O_DBS2_bitfield |= DBS2_PRES2h; | |
| 363 if(pres_surface - pres_respiration > 0.2) | |
| 364 int_O_DBS2_bitfield |= DBS2_PRES2l; | |
| 365 if(pres_surface < 0.75) | |
| 366 int_O_DBS2_bitfield |= DBS2_SURF2l; | |
| 367 if(pres_surface > 1.11) | |
| 368 int_O_DBS2_bitfield |= DBS2_SURF2h; | |
| 369 if(float_desaturation_multiplier < 0.70) | |
| 370 int_O_DBS2_bitfield |= DBS2_DESAT2l; | |
| 371 if(float_desaturation_multiplier > 1.01) | |
| 372 int_O_DBS2_bitfield |= DBS2_DESAT2h; | |
| 373 if(GF_low > GF_high) | |
| 374 int_O_DBS2_bitfield |= DBS2_GFDneg; | |
| 375 } | |
| 376 | |
| 167 | 377 ////////////////////////////////////////////////////////////////////////////// |
| 378 // DBG - set DBG to end_of_dive | |
| 379 // | |
| 380 static void set_dbg_end_of_dive(void) | |
| 116 | 381 { |
| 382 int_O_DBG_pre_bitfield &= (~DBG_RUN); | |
| 383 int_O_DBG_post_bitfield &= (~DBG_RUN); | |
| 384 } | |
| 385 | |
| 167 | 386 ////////////////////////////////////////////////////////////////////////////// |
| 387 // DBG - NDL at first 20 m. hit | |
| 388 // | |
| 389 static void check_ndl(void) | |
| 116 | 390 { |
| 167 | 391 if( char_O_NDL_at_20mtr == 255 // Still in NDL mode ? |
| 392 && int_I_pres_respiration > 3000 // And we hit the 20m limit ? | |
| 393 ) | |
| 116 | 394 { |
| 167 | 395 char_O_NDL_at_20mtr = char_O_nullzeit; // change to max bottom time. |
| 396 if( char_O_NDL_at_20mtr == 255) // and avoid confusion. | |
| 184 | 397 char_O_NDL_at_20mtr = 254; |
| 116 | 398 } |
| 399 } | |
| 400 | |
| 167 | 401 ////////////////////////////////////////////////////////////////////////////// |
| 402 // DBG - multi main during dive | |
| 403 // | |
| 184 | 404 static void check_dbg(PARAMETER char is_post_check) |
| 116 | 405 { |
| 203 | 406 overlay unsigned short temp_DBS = 0; |
| 200 | 407 overlay unsigned char i; // Local loop index. |
| 167 | 408 |
| 116 | 409 if( (DBG_N2_ratio != N2_ratio) || (DBG_He_ratio != He_ratio) ) |
| 410 temp_DBS |= DBG_c_gas; | |
| 411 if(DBG_const_ppO2 != const_ppO2) | |
| 412 temp_DBS |= DBG_c_ppO2; | |
| 167 | 413 if( DBG_float_saturation_multiplier != float_saturation_multiplier |
| 414 || DBG_float_desaturation_multiplier != float_desaturation_multiplier | |
| 415 ) | |
| 116 | 416 temp_DBS |= DBG_CdeSAT; |
| 417 if(DBG_char_I_deco_model != char_I_deco_model) | |
| 418 temp_DBS |= DBG_C_MODE; | |
| 419 if(DBG_pres_surface != pres_surface) | |
| 420 temp_DBS |= DBG_C_SURF; | |
| 167 | 421 |
| 422 if( !DBS_HE_sat && !He_ratio) | |
| 423 for(i = 16; i < 32; i++) | |
| 424 if(pres_tissue[i]) | |
| 116 | 425 temp_DBS |= DBG_HEwoHE; |
| 167 | 426 |
| 116 | 427 if(DBG_deco_ppO2 != deco_ppO2) |
| 428 temp_DBS |= DBG_C_DPPO2; | |
| 167 | 429 |
| 225 | 430 if( DBG_deco_gas_change != deco_gas_change[0] |
| 224 | 431 || DBG_deco_N2_ratio != char_I_deco_N2_ratio[0] |
| 432 || DBG_deco_He_ratio != char_I_deco_He_ratio[0] ) | |
| 116 | 433 temp_DBS |= DBG_C_DGAS; |
| 167 | 434 |
| 116 | 435 if(DBG_float_deco_distance != float_deco_distance) |
| 436 temp_DBS |= DBG_C_DIST; | |
| 437 if(DBG_char_I_depth_last_deco != char_I_depth_last_deco) | |
| 438 temp_DBS |= DBG_C_LAST; | |
| 167 | 439 if( DBG_GF_low != GF_low |
| 440 || DBG_GF_high != GF_high ) | |
| 116 | 441 temp_DBS |= DBG_C_GF; |
| 442 if(pres_respiration > 13.0) | |
| 443 temp_DBS |= DBG_PHIGH; | |
| 444 if(pres_surface - pres_respiration > 0.2) | |
| 445 temp_DBS |= DBG_PLOW; | |
| 446 if(is_post_check) | |
| 447 int_O_DBG_post_bitfield |= temp_DBS; | |
| 448 else | |
| 449 int_O_DBG_pre_bitfield |= temp_DBS; | |
| 450 } | |
| 451 | |
| 167 | 452 ////////////////////////////////////////////////////////////////////////////// |
| 453 // DBG - prior to calc. of dive | |
| 454 // | |
| 455 static void check_pre_dbg(void) | |
| 116 | 456 { |
| 457 check_dbg(0); | |
| 458 } | |
| 459 | |
| 167 | 460 ////////////////////////////////////////////////////////////////////////////// |
| 461 // DBG - after decocalc of dive | |
| 462 // | |
| 463 static void check_post_dbg(void) | |
| 116 | 464 { |
| 465 check_dbg(1); | |
| 466 } | |
| 467 | |
| 165 | 468 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 469 ////////////////////////////////////////////////////////////////////////////// |
| 470 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 471 ////////////////////////////////////////////////////////////////////////////// | |
| 472 ////////////////////////////////////////////////////////////////////////////// | |
| 473 | |
| 235 | 474 ////////////////////////////////////////////////////////////////////////////// |
|
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475 // Bump to blue-screen when an assert is wrong |
| 235 | 476 #ifdef __DEBUG |
| 477 void assert_failed(PARAMETER short int line) | |
| 478 { | |
| 479 extern void PLED_resetdebugger(void); | |
| 480 extern unsigned short temp10; | |
| 481 | |
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482 temp10 = line; // Show source line number as stack depth. |
| 235 | 483 PLED_resetdebugger(); |
| 484 } | |
| 485 #endif | |
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486 |
| 235 | 487 ////////////////////////////////////////////////////////////////////////////// |
| 488 // When calling C code from ASM context, the data stack pointer and | |
| 489 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
| 490 | |
| 491 #ifdef CROSS_COMPILE | |
| 492 # define RESET_C_STACK | |
| 493 #else | |
| 494 # ifdef __DEBUG | |
| 495 # define RESET_C_STACK fillDataStack(); | |
| 496 void fillDataStack(void) | |
| 497 { | |
| 498 _asm | |
| 499 LFSR 1,C_STACK | |
| 500 MOVLW 0xCC | |
| 501 loop: MOVWF POSTINC1,0 | |
| 502 TSTFSZ FSR1L,0 | |
| 503 BRA loop | |
| 504 | |
| 505 LFSR 1,C_STACK | |
| 506 LFSR 2,C_STACK | |
| 507 _endasm | |
| 508 } | |
| 509 # else | |
| 510 # define RESET_C_STACK \ | |
| 511 _asm \ | |
| 512 LFSR 1, C_STACK \ | |
| 513 LFSR 2, C_STACK \ | |
| 514 _endasm | |
| 515 # endif | |
| 516 #endif | |
| 517 | |
| 518 ////////////////////////////////////////////////////////////////////////////// | |
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519 // Read CF values from the C code. |
| 235 | 520 |
| 203 | 521 static short read_custom_function(PARAMETER unsigned char cf) |
| 167 | 522 { |
| 184 | 523 #ifdef CROSS_COMPILE |
| 524 extern unsigned short custom_functions[]; | |
| 525 return custom_functions[cf]; | |
| 526 #else | |
| 167 | 527 extern unsigned char hi, lo; |
| 528 extern void getcustom15(); | |
| 529 _asm | |
| 530 movff cf,WREG | |
| 531 call getcustom15,0 | |
| 532 movff lo,PRODL | |
| 533 movff hi,PRODH | |
| 534 _endasm | |
| 184 | 535 #endif |
| 167 | 536 } |
| 537 | |
| 538 ////////////////////////////////////////////////////////////////////////////// | |
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539 // Fast subroutine to read RTC timer 3. |
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540 // Note: result is in 1/32 of msecs. |
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541 static unsigned short tmr3(void) |
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542 { |
| 261 | 543 #ifndef CROSS_COMPILE |
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544 _asm |
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545 movff 0xfb2,PRODL // TMR3L |
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546 movff 0xfb3,PRODH // TMR3H |
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547 _endasm // result in PRODH:PRODL. |
| 261 | 548 #else |
| 549 return 0; | |
| 550 #endif | |
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551 } |
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552 |
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553 ////////////////////////////////////////////////////////////////////////////// |
| 258 | 554 // read buhlmann tables A and B for compatriment ci |
| 555 // | |
| 556 static void read_buhlmann_coefficients(void) | |
| 165 | 557 { |
| 184 | 558 #ifndef CROSS_COMPILE |
| 167 | 559 // Note: we don't use far rom pointer, because the |
| 560 // 24 bits is to complex, hence we have to set | |
| 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 |
| 197 | 569 assert( 0 <= ci && ci < 16 ); |
| 165 | 570 var_N2_a = buhlmann_a[ci]; |
| 571 var_N2_b = buhlmann_b[ci]; | |
| 167 | 572 var_He_a = (buhlmann_a+16)[ci]; |
| 573 var_He_b = (buhlmann_b+16)[ci]; | |
| 574 | |
| 165 | 575 // Check reading consistency: |
| 576 if( (var_N2_a < 0.231) | |
| 577 || (var_N2_a > 1.27) | |
| 578 || (var_N2_b < 0.504) | |
| 579 || (var_N2_b > 0.966) | |
| 580 || (var_He_a < 0.510) | |
| 581 || (var_He_a > 1.75) | |
| 582 || (var_He_b < 0.423) | |
| 583 || (var_He_b > 0.927) | |
| 584 ) | |
| 258 | 585 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; |
| 586 } | |
| 587 | |
| 588 ////////////////////////////////////////////////////////////////////////////// | |
| 589 // read buhlmann tables for compatriment ci | |
| 590 // If period == 0 : 2sec interval | |
| 591 // 1 : 1 min interval | |
| 592 // 2 : 10 min interval. | |
| 593 static void read_buhlmann_times(PARAMETER char period) | |
| 594 { | |
| 595 #ifndef CROSS_COMPILE | |
| 596 // Note: we don't use far rom pointer, because the | |
| 597 // 24 bits is to complex, hence we have to set | |
| 598 // the UPPER page ourself... | |
| 599 // --> Set zero if tables are moved to lower pages ! | |
| 600 _asm | |
| 601 movlw 1 | |
| 602 movwf TBLPTRU,0 | |
| 603 _endasm | |
| 604 #endif | |
| 605 assert( 0 <= ci && ci < 16 ); | |
| 606 | |
| 165 | 607 // Integration intervals. |
| 167 | 608 switch(period) |
| 165 | 609 { |
| 610 case 0: //---- 2 sec ----------------------------------------------------- | |
| 611 var_N2_e = e2secs[ci]; | |
| 167 | 612 var_He_e = (e2secs+16)[ci]; |
| 165 | 613 |
| 614 // Check reading consistency: | |
| 615 if( (var_N2_e < 0.0000363) | |
| 616 || (var_N2_e > 0.00577) | |
| 617 || (var_He_e < 0.0000961) | |
| 618 || (var_He_e > 0.150) | |
| 619 ) | |
| 620 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 621 | |
| 622 break; | |
| 623 | |
| 624 case 1: //---- 1 min ----------------------------------------------------- | |
| 625 var_N2_e = e1min[ci]; | |
| 167 | 626 var_He_e = (e1min+16)[ci]; |
| 165 | 627 |
| 628 // Check reading consistency: | |
| 629 if( (var_N2_e < 1.09E-3) | |
| 630 || (var_N2_e > 0.1592) | |
| 631 || (var_He_e < 0.00288) | |
| 632 || (var_He_e > 0.3682) | |
| 633 ) | |
| 634 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 635 | |
| 636 break; | |
| 637 | |
| 638 case 2: //---- 10 min ---------------------------------------------------- | |
| 639 var_N2_e = e10min[ci]; | |
| 167 | 640 var_He_e = (e10min+16)[ci]; |
| 165 | 641 |
| 642 // Check reading consistency: | |
| 643 if( (var_N2_e < 0.01085) | |
| 644 || (var_N2_e > 0.82323) | |
| 645 || (var_He_e < 0.02846) | |
| 646 || (var_He_e > 0.98986) | |
| 647 ) | |
| 648 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 649 | |
| 650 break; | |
| 197 | 651 |
| 652 default: | |
| 653 assert(0); // Never go there... | |
| 165 | 654 } |
| 655 } | |
| 656 | |
| 657 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 658 // calc_next_decodepth_GF |
| 165 | 659 // |
| 116 | 660 // new in v.102 |
| 165 | 661 // |
| 116 | 662 // INPUT, changing during dive: |
| 192 | 663 // low_depth |
| 167 | 664 // |
| 116 | 665 // INPUT, fixed during dive: |
| 167 | 666 // pres_surface |
| 667 // GF_delta | |
| 668 // GF_high | |
| 669 // GF_low | |
| 171 | 670 // char_I_depth_last_deco |
| 167 | 671 // float_deco_distance |
| 672 // | |
| 241 | 673 // RETURN TRUE iff a stop is needed. |
| 674 // | |
| 116 | 675 // OUTPUT |
| 171 | 676 // locked_GF_step |
| 167 | 677 // temp_depth_limt |
| 192 | 678 // low_depth |
| 167 | 679 // |
| 241 | 680 static unsigned char calc_nextdecodepth(void) |
| 167 | 681 { |
| 241 | 682 //--- Max ascent speed --------------------------------------------------- |
| 683 // Recompute leading gas limit, at current depth: | |
| 684 overlay float depth = (temp_deco - pres_surface) / 0.09985; | |
| 685 | |
| 686 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 302 | 687 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
| 241 | 688 |
| 689 // Do we need to stop at current depth ? | |
| 690 overlay unsigned char need_stop = 0; | |
| 691 | |
| 692 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 693 | |
| 212 | 694 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
| 116 | 695 if (char_I_deco_model == 1) |
| 696 { | |
| 241 | 697 if( depth >= low_depth ) |
| 192 | 698 sim_limit( GF_low ); |
| 699 else | |
| 700 sim_limit( GF_high - depth * locked_GF_step ); | |
| 701 | |
| 702 // Stops are needed ? | |
| 703 if( sim_lead_tissue_limit > pres_surface ) | |
| 704 { | |
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705 // Compute tolerated depth, for the leading tissue [metre]: |
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706 overlay float depth_tol = (sim_lead_tissue_limit - pres_surface) / 0.09985; |
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707 |
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708 // Deepest stop, in multiples of 3 metres. |
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709 overlay unsigned char first_stop = 3 * (short)(0.99999 + depth_tol * 0.33333 ); |
| 192 | 710 assert( first_stop < 128 ); |
| 171 | 711 |
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712 // Is it a new deepest needed stop ? If yes this is the reference for |
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713 // the varying gradient factor. So reset that: |
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714 if( depth_tol > min_depth && depth_tol > low_depth ) |
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715 { |
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716 // Store the deepest stop depth, as reference for GF_low. |
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717 low_depth = depth_tol; |
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718 locked_GF_step = GF_delta / low_depth; |
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719 } |
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720 |
| 264 | 721 #if defined(__DEBUG) || defined(CROSS_COMPILE) |
| 261 | 722 { |
| 723 // Extra testing code to make sure the first_stop formula | |
| 724 // and rounding provides correct depth: | |
| 725 overlay float pres_stop = first_stop * 0.09985 // Meters to bar | |
| 726 + pres_surface; | |
| 727 | |
| 728 // Keep GF_low until a first stop depth is found: | |
| 729 if( first_stop >= low_depth ) | |
| 730 sim_limit( GF_low ); | |
| 731 else | |
| 732 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 733 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 734 sim_limit( GF_high - first_stop * locked_GF_step ); | |
| 735 | |
| 302 | 736 // upper limit (lowest pressure tolerated), + 1mbar for rounding...: |
| 737 assert( sim_lead_tissue_limit < (pres_stop + 0.001) ); | |
| 261 | 738 } |
| 739 #endif | |
| 740 | |
| 212 | 741 // Apply correction for the shallowest stop. |
| 192 | 742 if( first_stop == 3 ) // new in v104 |
| 743 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 171 | 744 |
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745 // Because gradient factor at first_stop might be bigger than at |
| 261 | 746 // current depth, we might ascent a bit more. |
| 747 // Hence, check all stops until one is indeed higher than tolerated presure: | |
| 748 while(first_stop > 0) | |
| 192 | 749 { |
| 750 overlay unsigned char next_stop; // Next index (0..30) | |
| 751 overlay float pres_stop; // Next depth (0m..90m) | |
| 171 | 752 |
| 241 | 753 // Check max speed, or reaching surface. |
| 754 if( first_stop <= min_depth ) | |
| 755 break; | |
| 756 | |
| 757 // So, there is indeed a stop needed: | |
| 758 need_stop = 1; | |
| 759 | |
| 192 | 760 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
| 761 next_stop = 0; | |
| 216 | 762 else if( first_stop == 6 ) |
| 763 next_stop = char_I_depth_last_deco; | |
| 192 | 764 else |
| 765 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 167 | 766 |
| 241 | 767 pres_stop = next_stop * 0.09985 // Meters to bar |
| 192 | 768 + pres_surface; |
| 769 | |
| 212 | 770 // Keep GF_low until a first stop depth is found: |
| 771 if( next_stop >= low_depth ) | |
| 772 sim_limit( GF_low ); | |
| 773 else | |
| 774 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 775 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 776 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 171 | 777 |
| 192 | 778 // upper limit (lowest pressure tolerated): |
| 779 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 780 break; | |
| 781 | |
| 782 // Else, validate that stop and loop... | |
| 783 first_stop = next_stop; | |
| 212 | 784 } |
| 785 | |
| 786 // next stop is the last validated depth found, aka first_stop | |
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787 temp_depth_limit = first_stop; // Stop depth, in metre. |
| 192 | 788 } |
| 171 | 789 else |
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790 temp_depth_limit = 0; // stop depth, in metre. |
| 116 | 791 } |
| 167 | 792 else //---- ZH-L16 model ------------------------------------------------- |
| 116 | 793 { |
| 192 | 794 overlay float pres_gradient; |
| 795 | |
| 796 // Original model | |
| 116 | 797 // optimized in v.101 |
| 171 | 798 // char_I_depth_last_deco included in v.101 |
| 116 | 799 |
| 192 | 800 // Compute sim_lead_tissue_limit too, but just once. |
| 801 sim_limit(1.0); | |
| 802 | |
| 803 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 167 | 804 if (pres_gradient >= 0) |
| 116 | 805 { |
| 241 | 806 pres_gradient /= 0.29955; // Bar --> stop number; |
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807 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
| 241 | 808 need_stop = 1; // Hit. |
| 809 | |
| 810 // Implement last stop at 4m/5m/6m... | |
| 811 if( temp_depth_limit == 3 ) | |
| 812 temp_depth_limit = char_I_depth_last_deco; | |
| 171 | 813 } |
| 116 | 814 else |
| 241 | 815 temp_depth_limit = 0; |
| 171 | 816 } |
| 212 | 817 |
| 217 | 818 //---- Check gas change -------------------------------------------------- |
| 241 | 819 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
| 820 | |
| 821 return need_stop; | |
| 167 | 822 } |
| 116 | 823 |
| 167 | 824 ////////////////////////////////////////////////////////////////////////////// |
|
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825 // copy_deco_table |
| 167 | 826 // |
|
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827 // Buffer the stops, once computed, so we can continue to display them |
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828 // while computing the next set. |
| 167 | 829 // |
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830 static void copy_deco_table(void) |
| 116 | 831 { |
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832 // Copy depth of the first (deepest) stop, because when reversing |
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833 // order, it will be hard to find... |
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834 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
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835 char_O_first_deco_time = internal_deco_time [0]; |
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836 |
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837 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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838 { |
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839 overlay unsigned char x, y; |
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840 |
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841 //---- First: search the first non-null depth |
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842 for(x=31; x != 0; --x) |
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843 if( internal_deco_depth[x] != 0 ) break; |
| 116 | 844 |
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845 //---- Second: copy to output table (in reverse order) |
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846 for(y=0; y<32; y++, --x) |
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847 { |
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848 char_O_deco_depth[y] = internal_deco_depth[x]; |
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849 char_O_deco_time [y] = internal_deco_time [x]; |
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850 |
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851 // Stop only once the last transfer is done. |
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852 if( x == 0 ) break; |
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853 } |
| 116 | 854 |
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855 //---- Third: fill table end with null |
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856 for(y++; y<32; y++) |
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857 { |
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858 char_O_deco_time [y] = 0; |
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859 char_O_deco_depth[y] = 0; |
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860 } |
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861 } |
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862 else //---- Straight copy ------------------------------------------------ |
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863 { |
| 167 | 864 overlay unsigned char x; |
| 865 | |
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866 for(x=0; x<32; x++) |
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867 { |
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868 char_O_deco_depth[x] = internal_deco_depth[x]; |
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869 char_O_deco_time [x] = internal_deco_time [x]; |
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870 } |
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871 } |
| 167 | 872 } |
| 116 | 873 |
| 167 | 874 ////////////////////////////////////////////////////////////////////////////// |
| 116 | 875 // temp_tissue_safety // |
| 167 | 876 // |
| 116 | 877 // outsourced in v.102 |
| 167 | 878 // |
| 879 // Apply safety factors for brand ZH-L16 model. | |
| 880 // | |
| 881 static void temp_tissue_safety(void) | |
| 116 | 882 { |
| 197 | 883 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
| 884 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 885 | |
| 167 | 886 if( char_I_deco_model == 0 ) |
| 116 | 887 { |
| 888 if (temp_tissue < 0.0) | |
| 126 | 889 temp_tissue *= float_desaturation_multiplier; |
| 116 | 890 else |
| 126 | 891 temp_tissue *= float_saturation_multiplier; |
| 116 | 892 } |
| 167 | 893 } |
| 116 | 894 |
| 167 | 895 ////////////////////////////////////////////////////////////////////////////// |
| 896 ////////////////////////////////////////////////////////////////////////////// | |
| 116 | 897 // ** THE JUMP-IN CODE ** |
| 898 // ** for the asm code ** | |
| 167 | 899 ////////////////////////////////////////////////////////////////////////////// |
| 900 ////////////////////////////////////////////////////////////////////////////// | |
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901 |
| 167 | 902 ////////////////////////////////////////////////////////////////////////////// |
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903 // Called every 2 seconds during diving. |
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904 // update tissues every time. |
| 184 | 905 // |
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906 // Every 6 seconds (or slower when TTS > 16): |
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907 // - update deco table (char_O_deco_time/depth) with new values. |
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908 // - update ascent time, |
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909 // - set status to zero (so we can check there is new results). |
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910 // |
| 116 | 911 void deco_calc_hauptroutine(void) |
| 912 { | |
|
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913 RESET_C_STACK |
| 116 | 914 calc_hauptroutine(); |
| 915 int_O_desaturation_time = 65535; | |
| 916 } | |
| 917 | |
| 167 | 918 ////////////////////////////////////////////////////////////////////////////// |
| 184 | 919 // Reset decompression model: |
| 920 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 921 // + Reset last stop to 0m | |
| 922 // + Reset all model output. | |
| 116 | 923 void deco_clear_tissue(void) |
| 924 { | |
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925 RESET_C_STACK |
| 116 | 926 clear_tissue(); |
| 927 } | |
| 928 | |
| 167 | 929 ////////////////////////////////////////////////////////////////////////////// |
| 278 | 930 // Called every 1 min during decoplanning. |
| 931 // Update tissues for 1 min. | |
| 932 // | |
| 933 void deco_calc_tissue(void) | |
| 934 { | |
| 935 RESET_C_STACK | |
| 936 calc_hauptroutine_update_tissues(); | |
| 937 } | |
| 938 | |
| 939 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 940 |
| 116 | 941 void deco_calc_wo_deco_step_1_min(void) |
| 942 { | |
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943 RESET_C_STACK |
| 116 | 944 calc_wo_deco_step_1_min(); |
| 945 deco_calc_desaturation_time(); | |
| 946 } | |
| 947 | |
| 167 | 948 ////////////////////////////////////////////////////////////////////////////// |
| 949 | |
| 116 | 950 void deco_debug(void) |
| 951 { | |
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952 RESET_C_STACK |
| 116 | 953 } |
| 954 | |
| 241 | 955 |
| 956 ////////////////////////////////////////////////////////////////////////////// | |
| 957 // Find current gas in the list (if any). | |
| 958 // | |
| 959 // Input: char_I_deco_N2_ratio[] and He, to detect breathed gas. | |
| 960 // | |
| 961 // Output: sim_gas_depth_used | |
| 962 // | |
| 963 static void gas_switch_find_current(void) | |
| 964 { | |
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965 overlay unsigned char j; |
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966 overlay unsigned char N2 = (unsigned char)(N2_ratio * 100 + 0.5); |
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967 overlay unsigned char He = (unsigned char)(He_ratio * 100 + 0.5); |
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968 |
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969 for(j=0; j<5; ++j) |
| 241 | 970 { |
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971 // Make sure to detect if we are already breathing some gas in |
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972 // the current list (happends when first gas do have a depth). |
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973 if( N2 == char_I_deco_N2_ratio[j] |
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974 && He == char_I_deco_He_ratio[j] |
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975 ) |
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976 { |
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977 if( char_I_deco_gas_change[j] ) |
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978 temp_depth_limit = sim_gas_last_depth = char_I_deco_gas_change[j]; |
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979 sim_gas_last_used = j+1; |
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980 break; |
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981 } |
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982 } |
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983 |
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984 // If there is no gas-switch-delay running ? |
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985 if( sim_gas_delay <= sim_dive_mins) |
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986 { |
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987 // Compute current depth: |
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988 overlay unsigned char depth = (unsigned char)((pres_respiration - pres_surface) / 0.09985); |
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989 assert( depth < 130 ); |
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990 |
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991 // And if I'm above the last decostop (with the 3m margin) ? |
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992 if( (sim_gas_last_depth-3) > depth ) |
| 241 | 993 { |
|
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994 for(j=0; j<5; ++j) |
| 241 | 995 { |
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996 // And If I am in the range of a valide stop ? |
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997 // (again, with the same 3m margin) |
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998 if( char_I_deco_gas_change[j] |
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999 && depth <= char_I_deco_gas_change[j] |
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1000 && depth >= (char_I_deco_gas_change[j] - 3) |
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1001 ) |
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1002 { |
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1003 // Then start gas-switch timer there, |
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1004 sim_gas_delay = sim_dive_mins |
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1005 + read_custom_function(55); |
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1006 |
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1007 // And make sure decostop will be recorded at the right depth. |
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1008 temp_depth_limit = char_I_deco_gas_change[j]; |
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1009 break; |
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1010 } |
| 241 | 1011 } |
| 1012 } | |
|
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1013 else |
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1014 // Make clear there is no deay anymore. |
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1015 sim_gas_delay = 0; |
| 241 | 1016 } |
| 1017 } | |
| 1018 | |
| 167 | 1019 ////////////////////////////////////////////////////////////////////////////// |
| 217 | 1020 // Find deepest available gas. |
| 201 | 1021 // |
| 241 | 1022 // Input: temp_depth_limit, |
| 1023 // deco_gas_change[] | |
| 1024 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
| 212 | 1025 // |
| 241 | 1026 // RETURNS TRUE if a stop is needed for gas switch. |
| 1027 // | |
| 1028 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
| 212 | 1029 // |
| 241 | 1030 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
| 1031 // are null), or during the ascent to make sure we are not passing a | |
| 1032 // stop (in which case both can be already set). | |
| 1033 // | |
| 1034 static unsigned char gas_switch_deepest(void) | |
| 201 | 1035 { |
| 241 | 1036 overlay unsigned char switch_deco = 0, switch_last = 0; |
| 201 | 1037 |
| 1038 if (char_I_const_ppO2 == 0) | |
| 1039 { | |
| 225 | 1040 overlay unsigned char j; |
| 1041 | |
| 241 | 1042 // Loop over all enabled gas, to find the deepest one, |
| 1043 // above las gas, but below temp_depth_limit. | |
| 1044 for(j=0; j<5; ++j) | |
| 225 | 1045 { |
| 241 | 1046 // Gas not (yet) allowed ? Skip ! |
| 1047 if( temp_depth_limit > deco_gas_change[j] ) | |
| 1048 continue; | |
| 1049 | |
| 1050 // Gas deeper than the current/previous one ? Skip ! | |
| 1051 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) | |
| 1052 continue; | |
| 1053 | |
| 1054 // First, or deeper ? | |
|
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1055 if( switch_deco < deco_gas_change[j] ) |
| 241 | 1056 { |
| 1057 switch_deco = deco_gas_change[j]; | |
| 1058 switch_last = j+1; | |
| 1059 } | |
| 225 | 1060 } |
| 201 | 1061 } |
| 1062 | |
| 203 | 1063 // If there is a better gas available |
| 241 | 1064 if( switch_deco ) |
| 201 | 1065 { |
| 241 | 1066 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
| 201 | 1067 |
| 241 | 1068 // Should restart gas-switch delay only when gas do changes... |
| 1069 assert( sim_gas_delay <= sim_dive_mins ); | |
| 217 | 1070 |
| 241 | 1071 sim_gas_last_depth = switch_deco; |
| 1072 sim_gas_last_used = switch_last; | |
| 1073 sim_gas_delay = read_custom_function(55); | |
| 217 | 1074 |
| 241 | 1075 // Apply depth correction ONLY if CF#55 is not null: |
| 1076 if( sim_gas_delay > 0 ) | |
| 225 | 1077 { |
| 241 | 1078 sim_gas_delay += sim_dive_mins; |
| 1079 temp_depth_limit = switch_deco; | |
| 1080 return 1; | |
| 225 | 1081 } |
| 241 | 1082 |
| 1083 return 0; | |
| 217 | 1084 } |
| 1085 | |
| 241 | 1086 sim_gas_delay = 0; |
| 1087 return 0; | |
| 217 | 1088 } |
| 1089 | |
| 1090 ////////////////////////////////////////////////////////////////////////////// | |
| 1091 // Calculate gas switches | |
| 1092 // | |
| 1093 // | |
| 1094 // Input: N2_ratio, He_ratio. | |
| 1095 // sim_gas_last_used | |
| 1096 // | |
| 1097 // Output: calc_N2_ratio, calc_He_ratio | |
| 1098 // | |
| 241 | 1099 static void gas_switch_set(void) |
| 217 | 1100 { |
| 224 | 1101 assert( 0 <= sim_gas_last_used && sim_gas_last_used <= 5 ); |
| 217 | 1102 |
| 224 | 1103 if( sim_gas_last_used == 0 ) |
| 1104 { | |
| 1105 calc_N2_ratio = N2_ratio; | |
| 1106 calc_He_ratio = He_ratio; | |
| 1107 } | |
| 1108 else | |
| 1109 { | |
| 1110 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
| 1111 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
| 217 | 1112 } |
| 201 | 1113 |
| 1114 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
| 1115 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
| 1116 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
| 1117 } | |
| 1118 | |
| 1119 ////////////////////////////////////////////////////////////////////////////// | |
| 1120 // | |
| 212 | 1121 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
| 1122 // temp_deco : simulated respiration pressure + security offset (deco_distance) | |
| 276 | 1123 // float_deco_distance : security factor. |
| 212 | 1124 // Water-vapor pressure inside lumbs (ppWVapour). |
| 1125 // | |
| 236 | 1126 // Output: ppN2, ppHe. |
| 212 | 1127 // |
| 1128 static void sim_alveolar_presures(void) | |
| 201 | 1129 { |
| 212 | 1130 overlay float deco_diluent = temp_deco; // new in v.101 |
| 1131 | |
| 276 | 1132 // Take deco offset into account, but not at surface. |
| 1133 // Note: this should be done on ambiant pressure, hence before | |
| 1134 // computing the diluant partial pressure... | |
| 1135 if( deco_diluent > pres_surface ) | |
| 1136 deco_diluent += float_deco_distance; | |
| 1137 | |
| 212 | 1138 //---- CCR mode : deco gas switch ? -------------------------------------- |
| 276 | 1139 if( char_I_const_ppO2 != 0 ) |
| 201 | 1140 { |
| 276 | 1141 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
| 1142 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
| 1143 // ppWVapour in the equations below: | |
| 212 | 1144 if( temp_deco > deco_ppO2_change ) |
| 276 | 1145 deco_diluent -= const_ppO2; |
| 201 | 1146 else |
| 276 | 1147 deco_diluent -= deco_ppO2; |
| 1148 deco_diluent /= calc_N2_ratio + calc_He_ratio; | |
| 212 | 1149 |
| 1150 if (deco_diluent > temp_deco) | |
| 1151 deco_diluent = temp_deco; | |
| 201 | 1152 } |
| 1153 | |
| 212 | 1154 if( deco_diluent > ppWVapour ) |
| 201 | 1155 { |
| 236 | 1156 ppN2 = calc_N2_ratio * (deco_diluent - ppWVapour); |
| 201 | 1157 ppHe = calc_He_ratio * (deco_diluent - ppWVapour); |
| 1158 } | |
| 1159 else | |
| 1160 { | |
| 236 | 1161 ppN2 = 0.0; |
| 201 | 1162 ppHe = 0.0; |
| 1163 } | |
| 236 | 1164 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
| 201 | 1165 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
| 1166 } | |
| 1167 | |
| 1168 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 1169 // clear_tissue |
| 1170 // | |
| 165 | 1171 // optimized in v.101 (var_N2_a) |
| 167 | 1172 // |
| 1173 // preload tissues with standard pressure for the given ambient pressure. | |
| 1174 // Note: fixed N2_ratio for standard air. | |
| 201 | 1175 // |
| 167 | 1176 static void clear_tissue(void) |
| 116 | 1177 { |
| 1178 flag_in_divemode = 0; | |
| 1179 int_O_DBS_bitfield = 0; | |
| 1180 int_O_DBS2_bitfield = 0; | |
| 1181 int_O_DBG_pre_bitfield = 0; | |
| 1182 int_O_DBG_post_bitfield = 0; | |
| 1183 char_O_NDL_at_20mtr = 255; | |
| 1184 | |
| 167 | 1185 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
| 1186 N2_ratio = 0.7902; | |
| 212 | 1187 pres_respiration = int_I_pres_respiration * 0.001; |
| 164 | 1188 |
| 167 | 1189 for(ci=0; ci<16; ci++) |
| 126 | 1190 { |
| 197 | 1191 // cycle through the 16 Bühlmann tissues |
| 200 | 1192 overlay float p = N2_ratio * (pres_respiration - ppWVapour); |
| 164 | 1193 pres_tissue[ci] = p; |
| 197 | 1194 |
| 1195 // cycle through the 16 Bühlmann tissues for Helium | |
| 167 | 1196 (pres_tissue+16)[ci] = 0.0; |
| 126 | 1197 } // for 0 to 16 |
| 116 | 1198 |
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1199 clear_deco_table(); |
| 126 | 1200 char_O_deco_status = 0; |
| 1201 char_O_nullzeit = 0; | |
| 168 | 1202 int_O_ascenttime = 0; |
| 126 | 1203 char_O_gradient_factor = 0; |
| 1204 char_O_relative_gradient_GF = 0; | |
| 197 | 1205 char_I_depth_last_deco = 0; // for compatibility with v.101pre_no_last_deco |
| 258 | 1206 |
| 1207 calc_lead_tissue_limit = 0.0; | |
| 1208 char_O_gtissue_no = 0; | |
| 167 | 1209 } |
| 116 | 1210 |
| 167 | 1211 ////////////////////////////////////////////////////////////////////////////// |
| 1212 // calc_hauptroutine | |
| 1213 // | |
| 1214 // this is the major code in dive mode calculates: | |
| 116 | 1215 // the tissues, |
| 167 | 1216 // the bottom time, |
| 1217 // and simulates the ascend with all deco stops. | |
| 171 | 1218 // |
| 1219 // The deco_state sequence is : | |
| 1220 // 3 (at surface) | |
| 1221 // +---> 0 : calc nullzeit | |
| 1222 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 1223 // | +-> 1 : simulate up to 16min of stops. | |
| 1224 // | +------< not finished | |
| 1225 // +--------< finish | |
| 1226 // | |
| 167 | 1227 static void calc_hauptroutine(void) |
| 116 | 1228 { |
| 241 | 1229 static unsigned char backup_gas_used = 0; |
| 1230 static unsigned char backup_gas_depth = 0; | |
| 217 | 1231 static unsigned char backup_gas_delay = 0; |
| 186 | 1232 |
| 116 | 1233 calc_hauptroutine_data_input(); |
| 1234 | |
| 1235 if(!flag_in_divemode) | |
| 1236 { | |
| 1237 flag_in_divemode = 1; | |
| 1238 create_dbs_set_dbg_and_ndl20mtr(); | |
| 1239 } | |
| 1240 else | |
| 1241 check_pre_dbg(); | |
| 1242 | |
| 1243 calc_hauptroutine_update_tissues(); | |
| 1244 calc_gradient_factor(); | |
| 1245 | |
| 167 | 1246 // toggle between calculation for nullzeit (bottom time), |
| 1247 // deco stops | |
| 1248 // and more deco stops (continue) | |
| 1249 switch( char_O_deco_status ) | |
| 116 | 1250 { |
| 186 | 1251 case 3: //---- At surface: start a new dive ------------------------------ |
| 1252 clear_deco_table(); | |
| 1253 copy_deco_table(); | |
| 200 | 1254 int_O_ascenttime = 0; // Reset DTR. |
| 1255 char_O_nullzeit = 0; // Reset bottom time. | |
| 278 | 1256 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
| 201 | 1257 |
| 217 | 1258 // Values that should be reset just once for the full real dive. |
| 1259 // This is used to record the lowest stop for the whole dive, | |
| 1260 // Including ACCROSS all simulated ascent. | |
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1261 low_depth = 0.0; |
| 217 | 1262 |
| 1263 // Reset gas switch history. | |
| 241 | 1264 backup_gas_used = sim_gas_last_used = 0; |
| 1265 backup_gas_depth = sim_gas_last_depth = 0; | |
| 217 | 1266 backup_gas_delay = sim_gas_delay = 0; |
| 203 | 1267 sim_dive_mins = 0; |
| 1268 break; | |
| 186 | 1269 |
| 167 | 1270 case 0: //---- bottom time ----------------------------------------------- |
| 1271 calc_nullzeit(); | |
| 1272 check_ndl(); | |
| 186 | 1273 char_O_deco_status = 2; // calc ascent next time. |
| 1274 break; | |
| 1275 | |
| 1276 case 2: //---- Simulate ascent to first stop ----------------------------- | |
| 203 | 1277 // Check proposed gas at begin of ascent simulation |
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1278 sim_dive_mins = int_I_divemins; // Init current time. |
| 241 | 1279 |
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1280 gas_switch_find_current(); // Lookup for current gas & time. |
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1281 gas_switch_set(); // setup calc_ratio's |
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1282 |
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1283 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1284 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
| 203 | 1285 backup_gas_delay = sim_gas_delay; |
| 186 | 1286 |
| 1287 sim_ascent_to_first_stop(); | |
| 201 | 1288 |
| 1289 char_O_deco_status = 1; // Calc stops next time (deco or gas switch). | |
| 167 | 1290 break; |
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1291 |
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1292 case 1: //---- Simulate stops -------------------------------------------- |
| 167 | 1293 calc_hauptroutine_calc_deco(); |
| 186 | 1294 |
| 1295 // If simulation is finished, restore the GF low reference, so that | |
| 1296 // next ascent simulation is done from the current depth: | |
| 217 | 1297 if( char_O_deco_status == 0 ) |
| 186 | 1298 { |
| 241 | 1299 sim_gas_last_used = backup_gas_used; |
| 1300 sim_gas_last_depth = backup_gas_depth; | |
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1301 sim_gas_delay = backup_gas_delay; |
| 186 | 1302 } |
| 167 | 1303 break; |
| 116 | 1304 } |
| 167 | 1305 |
| 116 | 1306 check_post_dbg(); |
| 1307 } | |
| 1308 | |
| 167 | 1309 ////////////////////////////////////////////////////////////////////////////// |
| 1310 // calc_hauptroutine_data_input | |
| 1311 // | |
| 1312 // Reset all C-code dive parameters from their ASM-code values. | |
| 1313 // Detect gas change condition. | |
| 1314 // | |
| 116 | 1315 void calc_hauptroutine_data_input(void) |
| 1316 { | |
| 203 | 1317 overlay short int_temp; |
| 126 | 1318 |
| 197 | 1319 pres_respiration = int_I_pres_respiration * 0.001; |
| 1320 pres_surface = int_I_pres_surface * 0.001; | |
| 1321 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1322 He_ratio = char_I_He_ratio * 0.01; | |
| 1323 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
| 116 | 1324 |
| 126 | 1325 // ____________________________________________________ |
| 1326 // | |
| 1327 // _____________ G A S _ C H A N G E S ________________ | |
| 1328 // ____________________________________________________ | |
| 1329 | |
| 212 | 1330 // Keep a margin of 150mbar = 1.50m |
| 1331 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1332 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 126 | 1333 |
| 225 | 1334 deco_gas_change[0] = 0; |
| 1335 deco_gas_change[1] = 0; | |
| 1336 deco_gas_change[2] = 0; | |
| 1337 deco_gas_change[3] = 0; | |
| 1338 deco_gas_change[4] = 0; | |
| 116 | 1339 |
| 203 | 1340 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
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1341 if(char_I_deco_gas_change[0]) |
| 126 | 1342 { |
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1343 if( int_temp > 100 *(short)char_I_deco_gas_change[0] ) |
| 225 | 1344 deco_gas_change[0] = char_I_deco_gas_change[0]; |
| 126 | 1345 } |
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1346 if(char_I_deco_gas_change[1]) |
| 126 | 1347 { |
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1348 if( int_temp > 100 *(short)char_I_deco_gas_change[1] ) |
| 225 | 1349 deco_gas_change[1] = char_I_deco_gas_change[1]; |
| 126 | 1350 } |
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1351 if(char_I_deco_gas_change[2]) |
| 126 | 1352 { |
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1353 if( int_temp > 100 *(short)char_I_deco_gas_change[2] ) |
| 225 | 1354 deco_gas_change[2] = char_I_deco_gas_change[2]; |
| 126 | 1355 } |
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1356 if(char_I_deco_gas_change[3]) |
| 126 | 1357 { |
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1358 if( int_temp > 100 *(short)char_I_deco_gas_change[3] ) |
| 225 | 1359 deco_gas_change[3] = char_I_deco_gas_change[3]; |
| 126 | 1360 } |
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1361 if(char_I_deco_gas_change[4]) |
| 126 | 1362 { |
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1363 if( int_temp > 100 *(short)char_I_deco_gas_change[4] ) |
| 225 | 1364 deco_gas_change[4] = char_I_deco_gas_change[4]; |
| 126 | 1365 } |
| 116 | 1366 |
| 197 | 1367 const_ppO2 = char_I_const_ppO2 * 0.01; |
| 307 | 1368 deco_ppO2_change = char_I_deco_ppO2_change / 99.85 |
| 197 | 1369 + pres_surface |
| 1370 + float_deco_distance; | |
| 1371 deco_ppO2 = char_I_deco_ppO2 * 0.01; | |
| 1372 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1373 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1374 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1375 GF_high = char_I_GF_High_percentage * 0.01; | |
| 126 | 1376 GF_delta = GF_high - GF_low; |
| 116 | 1377 } |
| 1378 | |
| 167 | 1379 ////////////////////////////////////////////////////////////////////////////// |
| 171 | 1380 // |
| 1381 // | |
| 116 | 1382 void calc_hauptroutine_update_tissues(void) |
| 1383 { | |
| 197 | 1384 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
| 1385 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
| 1386 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
| 237 | 1387 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1388 |
| 276 | 1389 pres_diluent = pres_respiration; |
| 307 | 1390 if( char_I_const_ppO2 != 0 ) // new in v.101 |
| 186 | 1391 { |
| 276 | 1392 pres_diluent -= const_ppO2; // new in v.101 |
| 1393 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
| 1394 if( pres_diluent > pres_respiration ) // new in v.101 | |
| 1395 pres_diluent = pres_respiration; // new in v.101 | |
| 307 | 1396 |
| 1397 char_O_diluent = (char)(pres_diluent/pres_respiration*100.0 + 0.5); | |
| 1398 char_O_diluent_ppO2 = (char)(pres_diluent * (1.0 - N2_ratio - He_ratio) * 100.0 + 0.5); | |
| 186 | 1399 } |
| 307 | 1400 |
| 1401 if( pres_diluent > ppWVapour ) // new in v.101 | |
| 116 | 1402 { |
| 307 | 1403 overlay float EAD, END; |
| 1404 | |
| 276 | 1405 ppN2 = N2_ratio * (pres_diluent - ppWVapour); // changed in v.101 |
| 200 | 1406 ppHe = He_ratio * (pres_diluent - ppWVapour); // changed in v.101 |
| 307 | 1407 |
| 1408 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
| 1409 // with plain air. | |
| 1410 // ppN2 = 79% * (P_EAD - ppWVapour) | |
| 1411 // EAD = (P_EAD - Psurface) * 10 | |
| 1412 // ie: EAD = (ppN2 / 0.7902 + ppWVapour -Psurface) * 10 | |
| 1413 EAD = (ppN2 / 0.7902 + ppWVapour - pres_surface) * 9.985; | |
| 1414 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; | |
| 1415 char_O_EAD = (char)(EAD + 0.5); | |
| 1416 | |
| 1417 // END : Equivalent Narcotic Dive. | |
| 1418 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
| 1419 // 0.23 btw). Hence the formula becomes: | |
| 1420 // END * BarPerMeter * (1.0 - 0.0) - ppWVapour + Psurface == Pambient - ppHe - ppWVapour | |
| 1421 // ie: END = (Pambient - ppHe - Psurface) * 9.985 | |
| 1422 // | |
| 1423 // Source cited: | |
| 1424 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
| 1425 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
| 1426 END = (pres_respiration - ppHe - pres_surface) * 9.985; | |
| 1427 if( END < 0.0 || END > 245.5 ) END = 0.0; | |
| 1428 char_O_END = (char)(END + 0.5); | |
| 116 | 1429 } |
| 167 | 1430 else // new in v.101 |
| 116 | 1431 { |
| 236 | 1432 ppN2 = 0.0; // new in v.101 |
| 200 | 1433 ppHe = 0.0; // new in v.101 |
| 307 | 1434 char_O_EAD = char_O_END = 0; |
| 116 | 1435 } |
| 1436 | |
| 1437 if(!char_I_step_is_1min) | |
| 192 | 1438 calc_tissue(0); |
| 116 | 1439 else |
| 192 | 1440 calc_tissue(1); |
| 186 | 1441 |
| 192 | 1442 // Calc limit for surface, ie. GF_high. |
| 258 | 1443 calc_limit(); |
| 186 | 1444 |
| 203 | 1445 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
| 1446 int_O_gtissue_press = (short)((pres_tissue[char_O_gtissue_no] + (pres_tissue+16)[char_O_gtissue_no]) * 1000); | |
| 192 | 1447 |
| 1448 // if guiding tissue can not be exposed to surface pressure immediately | |
| 1449 if( calc_lead_tissue_limit > pres_surface && char_O_deco_status == 0) | |
| 116 | 1450 { |
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1451 char_O_nullzeit = 0; // deco necessary |
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1452 char_O_deco_status = 2; // calculate ascent on next iteration. |
| 116 | 1453 } |
| 171 | 1454 } |
| 1455 | |
| 116 | 1456 |
| 167 | 1457 ////////////////////////////////////////////////////////////////////////////// |
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1458 // Compute stops. |
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1459 // |
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1460 // Note: because this can be very long, break on 16 iterations, and set state |
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1461 // to 0 when finished, or to 1 when needing to continue. |
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1462 // Note: because this might be very long (~ 66 ms by iteration in 1.84beta), |
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1463 // break the loop when total time > 512msec. |
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1464 // |
| 116 | 1465 void calc_hauptroutine_calc_deco(void) |
| 1466 { | |
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1467 overlay unsigned char loop; |
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1468 |
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1469 for(loop = 0; loop < 16; ++loop) |
| 116 | 1470 { |
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1471 // Limit loops to 512ms, using the RTC timer 3: |
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1472 if( tmr3() & (512*32) ) |
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1473 break; |
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1474 |
| 241 | 1475 // Do not ascent while doing a gas switch ? |
| 203 | 1476 if( sim_gas_delay <= sim_dive_mins ) |
| 1477 { | |
| 241 | 1478 if( calc_nextdecodepth() ) |
| 1479 { | |
| 1480 if( temp_depth_limit == 0 ) | |
| 1481 goto Surface; | |
| 116 | 1482 |
| 241 | 1483 //---- We hit a stop at temp_depth_limit --------------------- |
| 1484 temp_deco = temp_depth_limit * 0.09985 // Convert to relative bar, | |
| 1485 + pres_surface; // To absolute. | |
| 1486 update_deco_table(); // Adds a one minute stops. | |
| 1487 } | |
| 1488 else | |
| 1489 { | |
| 1490 //---- No stop ----------------------------------------------- | |
| 1491 temp_deco -= 0.9985; // Ascend 10m, no wait. | |
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1492 |
| 241 | 1493 //---- Finish computations once surface is reached ----------- |
| 1494 if( temp_deco <= pres_surface ) | |
| 1495 { | |
| 1496 Surface: | |
| 1497 copy_deco_table(); | |
| 1498 calc_ascenttime(); | |
| 1499 char_O_deco_status = 0; // calc nullzeit next time. | |
| 278 | 1500 char_O_deco_last_stop = 0; // Surface reached. |
| 241 | 1501 return; |
| 1502 } | |
| 1503 } | |
| 212 | 1504 } |
| 1505 else | |
| 241 | 1506 update_deco_table(); // Just pass one minute. |
| 197 | 1507 |
| 241 | 1508 //---- Then update tissue -------------------------------------------- |
| 203 | 1509 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1510 gas_switch_set(); // Apply any simulated gas change, once validated. |
| 212 | 1511 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
| 192 | 1512 sim_tissue(1); // Simulate compartiments for 1 minute. |
| 116 | 1513 } |
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1514 |
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1515 // Surface not reached, need more stops... |
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1516 char_O_deco_status = 1; // calc more stops next time. |
| 278 | 1517 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
| 116 | 1518 } |
| 1519 | |
| 167 | 1520 ////////////////////////////////////////////////////////////////////////////// |
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1521 // Simulation ascention to first deco stop. |
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1522 // |
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1523 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1524 // there is no need to break on more that 16 iterations |
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1525 // (or we are already in deep shit). |
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1526 // |
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1527 void sim_ascent_to_first_stop(void) |
| 116 | 1528 { |
| 171 | 1529 update_startvalues(); |
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1530 clear_deco_table(); |
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1531 |
| 200 | 1532 temp_deco = pres_respiration; // Starts from current real depth. |
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1533 |
| 212 | 1534 // Do we have a gas switch going on ? |
| 1535 if( sim_gas_delay > sim_dive_mins ) | |
| 1536 return; | |
| 1537 | |
| 241 | 1538 //---- Loop until first stop, gas switch, or surface is reached ---------- |
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1539 for(;;) |
| 116 | 1540 { |
| 241 | 1541 // Try ascending 1 full minute. |
| 1542 temp_deco -= 0.9985; // 1 min, at 10m/min. ~ 1bar. | |
| 203 | 1543 |
| 212 | 1544 // Compute sim_lead_tissue_limit at GF_low (deepest stop). |
| 1545 sim_limit(GF_low); | |
| 1546 | |
| 1547 // Did we reach deepest remaining stop ? | |
| 241 | 1548 if( temp_deco < sim_lead_tissue_limit ) |
| 212 | 1549 { |
| 241 | 1550 temp_deco += 0.9985; // Restore last correct depth, |
| 1551 break; // End fast ascent. | |
| 212 | 1552 } |
| 1553 | |
| 203 | 1554 // Did we reach surface ? |
| 1555 if( temp_deco <= pres_surface ) | |
| 1556 { | |
| 1557 temp_deco = pres_surface; // Yes: finished ! | |
| 1558 break; | |
| 1559 } | |
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1560 |
| 241 | 1561 // Check for gas change below new depth ? |
| 1562 temp_depth_limit = (temp_deco - pres_surface) / 0.09985; | |
| 1563 | |
| 1564 if( gas_switch_deepest() ) | |
| 1565 { | |
| 1566 temp_deco = temp_depth_limit * 0.09985 + 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 ////////////////////////////////////////////////////////////////////////////// |
| 1577 // calc_tissue | |
| 1578 // | |
| 116 | 1579 // optimized in v.101 |
| 167 | 1580 // |
| 184 | 1581 static void calc_tissue(PARAMETER unsigned char period) |
| 116 | 1582 { |
| 251 | 1583 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1584 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1585 |
| 126 | 1586 for (ci=0;ci<16;ci++) |
| 1587 { | |
| 258 | 1588 read_buhlmann_times(period); // 2 sec or 1 min period. |
| 116 | 1589 |
| 126 | 1590 // N2 |
| 236 | 1591 temp_tissue = (ppN2 - pres_tissue[ci]) * var_N2_e; |
| 126 | 1592 temp_tissue_safety(); |
| 167 | 1593 pres_tissue[ci] += temp_tissue; |
| 165 | 1594 |
| 126 | 1595 // He |
| 200 | 1596 temp_tissue = (ppHe - (pres_tissue+16)[ci]) * var_He_e; |
| 126 | 1597 temp_tissue_safety(); |
| 167 | 1598 (pres_tissue+16)[ci] += temp_tissue; |
| 192 | 1599 } |
| 167 | 1600 } |
| 116 | 1601 |
| 167 | 1602 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1603 // calc_limit |
| 167 | 1604 // |
| 192 | 1605 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
| 167 | 1606 // |
| 258 | 1607 static void calc_limit(void) |
| 167 | 1608 { |
| 192 | 1609 char_O_gtissue_no = 255; |
| 1610 calc_lead_tissue_limit = 0.0; | |
| 1611 | |
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1612 for(ci=0; ci<16;ci++) |
| 192 | 1613 { |
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1614 overlay float N2 = pres_tissue[ci]; |
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1615 overlay float He = (pres_tissue+16)[ci]; |
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1616 overlay float p = N2 + He; |
| 192 | 1617 |
| 258 | 1618 read_buhlmann_coefficients(); |
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1619 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1620 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
| 116 | 1621 |
| 192 | 1622 // Apply the Eric Baker's varying gradient factor correction. |
| 1623 // Note: the correction factor depends both on GF and b, | |
| 1624 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1625 // so that can change who is the leading gas... | |
| 1626 // Note: Also depends of the GF. So the calcul is different for | |
| 1627 // GF_low, current GF, or GF_high... | |
| 1628 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1629 // hence what would happend at surface, | |
| 1630 // hence at GF_high. | |
| 1631 if( char_I_deco_model == 1 ) | |
| 258 | 1632 p = ( p - var_N2_a * GF_high) * var_N2_b |
| 1633 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
| 192 | 1634 else |
| 1635 p = (p - var_N2_a) * var_N2_b; | |
| 258 | 1636 if( p < 0.0 ) p = 0.0; |
| 192 | 1637 |
| 1638 if( p > calc_lead_tissue_limit ) | |
| 1639 { | |
| 1640 char_O_gtissue_no = ci; | |
| 1641 calc_lead_tissue_limit = p; | |
| 1642 } | |
| 1643 } | |
| 197 | 1644 |
| 1645 assert( char_O_gtissue_no < 16 ); | |
| 1646 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); | |
| 167 | 1647 } |
| 1648 | |
| 1649 ////////////////////////////////////////////////////////////////////////////// | |
| 1650 // calc_nullzeit | |
| 1651 // | |
| 1652 // calculates the remaining bottom time | |
| 1653 // | |
| 1654 // unchanged in v.101 | |
| 1655 // | |
| 1656 static void calc_nullzeit(void) | |
| 1657 { | |
| 203 | 1658 overlay unsigned char loop; |
| 200 | 1659 update_startvalues(); |
| 167 | 1660 |
| 116 | 1661 char_O_nullzeit = 0; |
| 167 | 1662 for(loop = 1; loop <= 17; loop++) |
| 116 | 1663 { |
| 1664 backup_sim_pres_tissue(); | |
| 197 | 1665 sim_tissue(2); // 10 min. |
| 192 | 1666 sim_limit(GF_high); |
| 167 | 1667 |
| 192 | 1668 if( sim_lead_tissue_limit > pres_surface ) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately |
| 185 | 1669 { |
| 1670 restore_sim_pres_tissue(); | |
| 1671 break; | |
| 1672 } | |
| 1673 // Validate once we know its good. | |
| 1674 char_O_nullzeit += 10; | |
| 167 | 1675 } |
| 1676 | |
| 116 | 1677 if (char_O_nullzeit < 60) |
| 1678 { | |
| 167 | 1679 for(loop=1; loop <= 10; loop++) |
| 116 | 1680 { |
| 197 | 1681 sim_tissue(1); // 1 min |
| 192 | 1682 sim_limit(GF_high); |
| 1683 | |
| 1684 if( sim_lead_tissue_limit > pres_surface) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately | |
| 185 | 1685 break; |
| 1686 char_O_nullzeit++; | |
| 167 | 1687 } |
| 185 | 1688 } |
| 1689 } | |
| 116 | 1690 |
| 167 | 1691 ////////////////////////////////////////////////////////////////////////////// |
| 1692 // backup_sim_pres_tissue | |
| 1693 // | |
| 116 | 1694 void backup_sim_pres_tissue(void) |
| 1695 { | |
| 167 | 1696 overlay unsigned char x; |
| 1697 | |
| 1698 for(x = 0; x<32; x++) | |
| 126 | 1699 sim_pres_tissue_backup[x] = sim_pres_tissue[x]; |
| 167 | 1700 } |
| 116 | 1701 |
| 167 | 1702 ////////////////////////////////////////////////////////////////////////////// |
| 1703 // restore_sim_pres_tissue | |
| 1704 // | |
| 116 | 1705 void restore_sim_pres_tissue(void) |
| 1706 { | |
| 167 | 1707 overlay unsigned char x; |
| 1708 | |
| 1709 for(x = 0; x<32; x++) | |
| 126 | 1710 sim_pres_tissue[x] = sim_pres_tissue_backup[x]; |
| 167 | 1711 } |
| 116 | 1712 |
| 167 | 1713 ////////////////////////////////////////////////////////////////////////////// |
| 1714 // calc_ascenttime | |
| 1715 // | |
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1716 static void calc_ascenttime(void) |
| 116 | 1717 { |
| 126 | 1718 if (pres_respiration > pres_surface) |
| 1719 { | |
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1720 overlay unsigned char x; |
| 168 | 1721 |
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1722 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
| 192 | 1723 overlay float ascent = pres_respiration - pres_surface + 0.7; |
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1724 if (ascent < 0.0) |
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1725 ascent = 0.0; |
| 203 | 1726 int_O_ascenttime = (unsigned short)(ascent + 0.99); |
| 168 | 1727 |
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1728 for(x=0; x<32 && internal_deco_depth[x]; x++) |
| 203 | 1729 int_O_ascenttime += (unsigned short)internal_deco_time[x]; |
| 126 | 1730 } |
| 1731 else | |
| 168 | 1732 int_O_ascenttime = 0; |
| 167 | 1733 } |
| 116 | 1734 |
| 167 | 1735 ////////////////////////////////////////////////////////////////////////////// |
| 1736 // update_startvalues | |
| 1737 // | |
| 116 | 1738 // updated in v.102 |
| 167 | 1739 // |
| 116 | 1740 void update_startvalues(void) |
| 1741 { | |
| 167 | 1742 overlay unsigned char x; |
| 116 | 1743 |
| 201 | 1744 // Start ascent simulation with current tissue partial pressures. |
| 116 | 1745 for (x = 0;x<16;x++) |
| 1746 { | |
| 1747 sim_pres_tissue[x] = pres_tissue[x]; | |
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1748 (sim_pres_tissue+16)[x] = (pres_tissue+16)[x]; |
| 116 | 1749 } |
| 197 | 1750 |
| 201 | 1751 // No leading tissue (yet) for this ascent simulation. |
| 197 | 1752 sim_lead_tissue_limit = 0.0; |
| 1753 sim_lead_tissue_no = 255; | |
| 167 | 1754 } |
| 116 | 1755 |
| 167 | 1756 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1757 // sim_tissue |
| 167 | 1758 // |
| 116 | 1759 // optimized in v.101 |
| 167 | 1760 // |
| 1761 // Function very simular to calc_tissue, but: | |
| 1762 // + Use a 1min or 10min period. | |
| 1763 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 184 | 1764 static void sim_tissue(PARAMETER unsigned char period) |
| 116 | 1765 { |
| 251 | 1766 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1767 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1768 |
| 192 | 1769 for(ci=0; ci<16; ci++) |
| 126 | 1770 { |
| 258 | 1771 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
| 165 | 1772 |
| 126 | 1773 // N2 |
| 236 | 1774 temp_tissue = (ppN2 - sim_pres_tissue[ci]) * var_N2_e; |
| 126 | 1775 temp_tissue_safety(); |
| 167 | 1776 sim_pres_tissue[ci] += temp_tissue; |
| 126 | 1777 |
| 1778 // He | |
| 200 | 1779 temp_tissue = (ppHe - (sim_pres_tissue+16)[ci]) * var_He_e; |
| 126 | 1780 temp_tissue_safety(); |
| 167 | 1781 (sim_pres_tissue+16)[ci] += temp_tissue; |
| 192 | 1782 } |
| 167 | 1783 } |
| 116 | 1784 |
| 167 | 1785 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1786 // sim_limit() |
| 1787 // | |
| 1788 // New in v.111 | |
| 1789 // | |
| 1790 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1791 // different depth, because it depends on current gradient factor. | |
| 167 | 1792 // |
| 192 | 1793 static void sim_limit(PARAMETER float GF_current) |
| 116 | 1794 { |
| 212 | 1795 assert( 0.0 < GF_current && GF_current <= 1.0f); |
| 1796 | |
| 192 | 1797 sim_lead_tissue_limit = 0.0; |
| 212 | 1798 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
| 192 | 1799 |
| 1800 for(ci=0; ci<16; ci++) | |
| 1801 { | |
| 241 | 1802 overlay float N2 = sim_pres_tissue[ci]; |
| 1803 overlay float He = (sim_pres_tissue+16)[ci]; | |
| 1804 overlay float p = N2 + He; | |
| 192 | 1805 |
| 258 | 1806 read_buhlmann_coefficients(); |
| 241 | 1807 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
| 1808 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 192 | 1809 |
| 1810 // Apply the Eric Baker's varying gradient factor correction. | |
| 1811 // Note: the correction factor depends both on GF and b, | |
| 1812 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1813 // so that can change who is the leading gas... | |
| 1814 // Note: Also depends of the GF_current... | |
| 1815 if( char_I_deco_model == 1 ) | |
| 302 | 1816 p = ( p - var_N2_a * GF_current) |
| 1817 / (GF_current / var_N2_b + 1.0 - GF_current); | |
| 192 | 1818 else |
| 1819 p = (p - var_N2_a) * var_N2_b; | |
| 237 | 1820 if( p < 0.0 ) p = 0.0; |
| 192 | 1821 |
| 1822 if( p > sim_lead_tissue_limit ) | |
| 1823 { | |
| 1824 sim_lead_tissue_no = ci; | |
| 1825 sim_lead_tissue_limit = p; | |
| 1826 } | |
| 1827 } // for ci | |
| 197 | 1828 |
| 1829 assert( sim_lead_tissue_no < 16 ); | |
| 237 | 1830 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
| 167 | 1831 } |
| 116 | 1832 |
| 167 | 1833 ////////////////////////////////////////////////////////////////////////////// |
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1834 // clear_deco_table |
| 167 | 1835 // |
| 1836 // unchanged in v.101 | |
| 1837 // | |
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1838 static void clear_deco_table(void) |
| 116 | 1839 { |
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1840 overlay unsigned char x; |
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1841 |
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1842 for(x=0; x<32; ++x) |
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1843 { |
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1844 internal_deco_time [x] = 0; |
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1845 internal_deco_depth[x] = 0; |
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1846 } |
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1847 } |
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1848 |
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1849 ////////////////////////////////////////////////////////////////////////////// |
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1850 // update_deco_table |
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1851 // |
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1852 // Add 1 min to current stop. |
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1853 // |
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1854 // Inputs: |
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1855 // temp_depth_limit = stop's depth, in meters. |
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1856 // In/Out: |
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1857 // internal_deco_depth[] : depth (in metres) of each stops. |
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1858 // internal_deco_time [] : time (in minutes) of each stops. |
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1859 // |
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1860 static void update_deco_table() |
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1861 { |
| 192 | 1862 overlay unsigned char x; |
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1863 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1864 assert( temp_depth_limit > 0 ); // No stop at surface... |
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1865 |
| 192 | 1866 for(x=0; x<32; ++x) |
| 1867 { | |
| 212 | 1868 // Make sure deco-stops are recorded in order: |
| 1869 assert( !internal_deco_depth[x] || temp_depth_limit <= internal_deco_depth[x] ); | |
| 1870 | |
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1871 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
| 192 | 1872 { |
| 1873 // Do not overflow (max 255') | |
| 1874 if( internal_deco_time[x] < 255 ) | |
| 1875 { | |
| 1876 internal_deco_time[x]++; | |
| 1877 return; | |
| 1878 } | |
| 1879 // But store extra in the next stop... | |
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1880 } |
| 192 | 1881 |
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1882 if( internal_deco_depth[x] == 0 ) |
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1883 { |
| 192 | 1884 internal_deco_depth[x] = temp_depth_limit; |
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1885 if( sim_gas_delay > sim_dive_mins ) |
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1886 internal_deco_depth[x] |= 0x80; |
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1887 |
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1888 internal_deco_time[x] = 1; |
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1889 return; |
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1890 } |
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1891 } |
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1892 |
| 192 | 1893 // Can't store stops at more than 96m. |
| 1894 // Or stops at less that 3m too. | |
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1895 // Just do nothing with that... |
| 167 | 1896 } |
| 116 | 1897 |
| 167 | 1898 ////////////////////////////////////////////////////////////////////////////// |
| 1899 // calc_gradient_factor | |
| 1900 // | |
| 165 | 1901 // optimized in v.101 (var_N2_a) |
| 116 | 1902 // new code in v.102 |
| 167 | 1903 // |
| 1904 static void calc_gradient_factor(void) | |
| 116 | 1905 { |
| 197 | 1906 overlay float gf; |
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1907 overlay float N2 = pres_tissue[char_O_gtissue_no]; |
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1908 overlay float He = (pres_tissue+16)[char_O_gtissue_no]; |
| 237 | 1909 |
| 197 | 1910 assert( char_O_gtissue_no < 16 ); |
| 237 | 1911 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1912 |
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1913 // tissue > respiration (currently off-gasing) |
| 302 | 1914 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
| 1915 // GF = 100% when respiration == limit. | |
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1916 temp_tissue = N2 + He; |
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1917 if( temp_tissue <= pres_respiration ) |
| 197 | 1918 gf = 0.0; |
| 1919 else | |
| 1920 { | |
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1921 overlay float limit = calc_lead_tissue_limit; |
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1922 // NOTE: in GF model, calc_lead_tissue_limit include already the |
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1923 // correction due to gradient factor. To compute the actual |
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1924 // current GF, we need to (re-)compute the raw ambiant-pressure |
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1925 // limit from the Bühlmann model. |
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1926 if( char_I_deco_model == 1 ) |
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1927 { |
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1928 ci = char_O_gtissue_no; |
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1929 read_buhlmann_coefficients(); |
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1930 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1931 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1932 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1933 } |
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1934 |
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1935 gf = (temp_tissue - pres_respiration) |
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1936 / (temp_tissue - limit) |
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1937 * 100.0; |
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1938 if( gf > 254.5 ) gf = 255.0; |
| 197 | 1939 if( gf < 0.0 ) gf = 0.0; |
| 1940 } | |
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1941 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
| 116 | 1942 |
| 1943 if (char_I_deco_model == 1) // calculate relative gradient factor | |
| 1944 { | |
| 197 | 1945 overlay float rgf; |
| 1946 | |
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1947 if( low_depth < 1.5 ) |
| 197 | 1948 rgf = GF_high; |
| 1949 else | |
| 1950 { | |
| 241 | 1951 overlay float temp1 = low_depth * 0.09985; |
| 197 | 1952 overlay float temp2 = pres_respiration - pres_surface; |
| 186 | 1953 |
| 197 | 1954 if (temp2 <= 0) |
| 1955 rgf = GF_high; | |
| 1956 else if (temp2 >= temp1) | |
| 1957 rgf = GF_low; | |
| 1958 else | |
| 1959 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 1960 } | |
| 186 | 1961 |
| 197 | 1962 rgf = gf / rgf; // gf is already in percent |
| 1963 if( rgf < 0.0 ) rgf = 0.0; | |
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1964 if( rgf > 254.5 ) rgf = 255.0; |
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1965 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
| 116 | 1966 } // calc relative gradient factor |
| 1967 else | |
| 1968 { | |
| 186 | 1969 char_O_relative_gradient_GF = char_O_gradient_factor; |
| 116 | 1970 } |
| 167 | 1971 } |
| 116 | 1972 |
| 167 | 1973 ////////////////////////////////////////////////////////////////////////////// |
| 1974 // deco_calc_desaturation_time | |
| 1975 // | |
| 116 | 1976 // FIXED N2_ratio |
| 1977 // unchanged in v.101 | |
| 233 | 1978 // Inputs: int_I_pres_surface, ppWVapour, char_I_desaturation_multiplier |
| 1979 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] | |
| 167 | 1980 // |
| 116 | 1981 void deco_calc_desaturation_time(void) |
| 1982 { | |
|
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1983 RESET_C_STACK |
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1984 |
| 233 | 1985 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 1986 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1987 | |
|
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1988 #ifndef CROSS_COMPILE |
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1989 // Note: we don't use far rom pointer, because the |
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1990 // 24 bits is to complex, hence we have to set |
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1991 // the UPPER page ourself... |
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1992 // --> Set zero if tables are moved to lower pages ! |
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1993 _asm |
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1994 movlw 1 |
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1995 movwf TBLPTRU,0 |
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1996 _endasm |
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1997 #endif |
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1998 |
| 237 | 1999 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
| 233 | 2000 pres_surface = int_I_pres_surface * 0.001; |
| 236 | 2001 ppN2 = N2_ratio * (pres_surface - ppWVapour); |
| 126 | 2002 int_O_desaturation_time = 0; |
| 2003 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) | |
| 233 | 2004 |
| 126 | 2005 for (ci=0;ci<16;ci++) |
| 2006 { | |
| 251 | 2007 overlay unsigned short desat_time; // For a particular compartiment, in min. |
| 2008 overlay float temp1; | |
| 2009 overlay float temp2; | |
| 2010 overlay float temp3; | |
| 2011 overlay float temp4; | |
| 2012 | |
| 126 | 2013 // saturation_time (for flight) and N2_saturation in multiples of halftime |
| 2014 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 2015 // 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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2016 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
| 126 | 2017 // N2 |
|
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2018 temp1 = 1.05 * ppN2 - pres_tissue[ci]; |
| 236 | 2019 temp2 = ppN2 - pres_tissue[ci]; |
| 126 | 2020 if (temp2 >= 0.0) |
| 2021 { | |
| 233 | 2022 temp1 = 0.0; |
| 2023 temp2 = 0.0; | |
| 126 | 2024 } |
| 2025 else | |
| 2026 temp1 = temp1 / temp2; | |
| 251 | 2027 if( 0.0 < temp1 && temp1 < 1.0 ) |
| 126 | 2028 { |
|
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2029 overlay float var_N2_halftime = buhlmann_ht[ci]; |
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2030 assert( 4.0 <= var_N2_halftime && var_N2_halftime <= 635.0 ); |
| 252 | 2031 |
|
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2032 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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2033 // minus because log is negative. |
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2034 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
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2035 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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2036 |
| 126 | 2037 } |
| 2038 else | |
| 2039 { | |
| 233 | 2040 temp1 = 0.0; |
| 2041 temp2 = 0.0; | |
| 126 | 2042 } |
| 116 | 2043 |
| 126 | 2044 // He |
| 167 | 2045 temp3 = 0.1 - (pres_tissue+16)[ci]; |
| 126 | 2046 if (temp3 >= 0.0) |
| 2047 { | |
| 233 | 2048 temp3 = 0.0; |
| 2049 temp4 = 0.0; | |
| 126 | 2050 } |
| 2051 else | |
|
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2052 temp3 = - temp3 / (pres_tissue+16)[ci]; |
| 251 | 2053 if( 0.0 < temp3 && temp3 < 1.0 ) |
| 126 | 2054 { |
|
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2055 overlay float var_He_halftime = (buhlmann_ht+16)[ci]; |
| 261 | 2056 assert( 1.51 <= var_He_halftime && var_He_halftime <= 240.03 ); |
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2057 |
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2058 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
| 126 | 2059 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
| 2060 // minus because log is negative | |
| 165 | 2061 temp4 = var_He_halftime * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
| 126 | 2062 } |
| 2063 else | |
| 2064 { | |
| 233 | 2065 temp3 = 0.0; |
| 2066 temp4 = 0.0; | |
| 126 | 2067 } |
| 116 | 2068 |
| 126 | 2069 // saturation_time (for flight) |
| 2070 if (temp4 > temp2) | |
| 203 | 2071 desat_time = (unsigned short)temp4; |
| 126 | 2072 else |
| 203 | 2073 desat_time = (unsigned short)temp2; |
| 252 | 2074 |
| 251 | 2075 if(desat_time > int_O_desaturation_time) |
| 2076 int_O_desaturation_time = desat_time; | |
| 116 | 2077 |
| 126 | 2078 // N2 saturation in multiples of halftime for display purposes |
| 2079 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 2080 temp2 = temp2 + 80.0; // set center | |
| 2081 if (temp2 < 0.0) | |
| 2082 temp2 = 0.0; | |
| 2083 if (temp2 > 255.0) | |
| 2084 temp2 = 255.0; | |
| 2085 char_O_tissue_saturation[ci] = (char)temp2; | |
| 233 | 2086 |
| 126 | 2087 // He saturation in multiples of halftime for display purposes |
| 2088 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 2089 temp4 = temp4 + 80.0; // set center | |
| 2090 if (temp4 < 0.0) | |
| 2091 temp4 = 0.0; | |
| 2092 if (temp4 > 255.0) | |
| 2093 temp4 = 255.0; | |
| 167 | 2094 (char_O_tissue_saturation+16)[ci] = (char)temp4; |
| 126 | 2095 } // for |
| 167 | 2096 } |
| 116 | 2097 |
| 167 | 2098 ////////////////////////////////////////////////////////////////////////////// |
| 2099 // calc_wo_deco_step_1_min | |
| 2100 // | |
| 116 | 2101 // FIXED N2 Ratio |
| 2102 // optimized in v.101 (...saturation_multiplier) | |
| 2103 // desaturation slowed down to 70,42% | |
| 167 | 2104 // |
| 2105 static void calc_wo_deco_step_1_min(void) | |
| 116 | 2106 { |
| 251 | 2107 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 2108 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
| 2109 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
| 2110 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 2111 | |
| 116 | 2112 if(flag_in_divemode) |
| 2113 { | |
| 2114 flag_in_divemode = 0; | |
| 2115 set_dbg_end_of_dive(); | |
| 2116 } | |
|
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2117 |
| 126 | 2118 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
| 233 | 2119 pres_respiration = int_I_pres_respiration * 0.001; // assembler code uses different digit system |
| 2120 pres_surface = int_I_pres_surface * 0.001; // the b"uhlmann formula using pres_surface does not use the N2_ratio | |
| 236 | 2121 ppN2 = N2_ratio * (pres_respiration - ppWVapour); // ppWVapour is the extra pressure in the body |
| 200 | 2122 ppHe = 0.0; |
| 126 | 2123 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) |
| 197 | 2124 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 126 | 2125 |
| 192 | 2126 calc_tissue(1); // update the pressure in the 32 tissues in accordance with the new ambient pressure |
| 167 | 2127 |
|
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2128 clear_deco_table(); |
| 200 | 2129 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
| 126 | 2130 char_O_nullzeit = 0; |
| 168 | 2131 int_O_ascenttime = 0; |
| 126 | 2132 calc_gradient_factor(); |
| 167 | 2133 } |
| 126 | 2134 |
| 167 | 2135 ////////////////////////////////////////////////////////////////////////////// |
| 2136 ////////////////////////////////////////////////////////////////////////////// | |
| 2137 ////////////////////////////////// deco_hash ///////////////////////////////// | |
| 2138 ////////////////////////////////////////////////////////////////////////////// | |
| 2139 ////////////////////////////////////////////////////////////////////////////// | |
| 126 | 2140 |
| 184 | 2141 #ifndef CROSS_COMPILE |
| 116 | 2142 void deco_hash(void) |
| 2143 { | |
| 167 | 2144 overlay unsigned char md_i, md_j; // Loop index. |
| 2145 overlay unsigned char md_t; | |
| 2146 overlay unsigned char md_buffer[16]; | |
| 2147 overlay unsigned char md_temp; | |
| 203 | 2148 overlay unsigned short md_pointer; |
| 167 | 2149 |
|
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2150 RESET_C_STACK |
| 126 | 2151 |
| 2152 // init | |
| 164 | 2153 for(md_i=0;md_i<16;md_i++) |
| 126 | 2154 { |
| 2155 md_state[md_i] = 0; | |
| 164 | 2156 char_O_hash[md_i] = 0; |
| 126 | 2157 } // for md_i 16 |
| 116 | 2158 |
| 126 | 2159 _asm |
| 167 | 2160 movlw 0x01 // md_pi address. |
| 2161 movwf TBLPTRU,0 | |
| 2162 movlw 0x7E | |
| 2163 movwf TBLPTRH,0 | |
| 2164 movlw 0x00 | |
| 2165 movwf TBLPTRL,0 | |
| 126 | 2166 _endasm; |
| 165 | 2167 md_i = 0; |
| 2168 do { | |
| 126 | 2169 _asm |
| 2170 TBLRDPOSTINC | |
| 2171 movff TABLAT,md_temp | |
| 2172 _endasm | |
| 165 | 2173 md_pi_subst[md_i++] = md_temp; |
| 2174 } while( md_i != 0 ); | |
| 2175 | |
| 126 | 2176 _asm |
| 167 | 2177 movlw 0x00 |
| 2178 movwf TBLPTRU,0 | |
| 2179 movlw 0x00 | |
| 2180 movwf TBLPTRH,0 | |
| 2181 movlw 0x00 | |
| 2182 movwf TBLPTRL,0 | |
| 126 | 2183 _endasm |
| 167 | 2184 |
| 126 | 2185 // cycle buffers |
| 2186 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
| 2187 { | |
| 2188 md_t = 0; | |
| 2189 for (md_i=0;md_i<16;md_i++) | |
| 2190 { | |
| 2191 if(md_pointer == 9) | |
| 164 | 2192 md_temp = char_O_hash[md_i]; |
| 126 | 2193 else |
| 2194 { | |
| 2195 _asm | |
| 167 | 2196 TBLRDPOSTINC |
| 2197 movff TABLAT,md_temp | |
| 126 | 2198 _endasm |
| 2199 } // else | |
| 167 | 2200 |
| 2201 md_buffer[md_i] = md_temp; | |
| 186 | 2202 md_state[md_i+16] = md_temp; |
| 2203 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
| 126 | 2204 } // for md_i 16 |
| 2205 | |
| 2206 for (md_i=0;md_i<18;md_i++) | |
| 2207 { | |
| 2208 for (md_j=0;md_j<48;md_j++) | |
| 2209 { | |
| 167 | 2210 md_state[md_j] ^= md_pi_subst[md_t]; |
| 126 | 2211 md_t = md_state[md_j]; |
| 2212 } // for md_j 48 | |
| 2213 md_t = (unsigned char)(md_t+1); | |
| 2214 } // for md_i 18 | |
| 164 | 2215 md_t = char_O_hash[15]; |
| 126 | 2216 |
| 2217 for (md_i=0;md_i<16;md_i++) | |
| 2218 { | |
| 167 | 2219 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
| 164 | 2220 md_t = char_O_hash[md_i]; |
| 126 | 2221 } // for md_i 16 |
| 2222 } // for md_pointer | |
| 116 | 2223 } // void deco_hash(void) |
| 184 | 2224 #endif |
| 116 | 2225 |
| 167 | 2226 ////////////////////////////////////////////////////////////////////////////// |
| 2227 // deco_clear_CNS_fraction | |
| 2228 // | |
| 116 | 2229 // new in v.101 |
| 167 | 2230 // |
| 116 | 2231 void deco_clear_CNS_fraction(void) |
| 2232 { | |
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2233 RESET_C_STACK |
| 237 | 2234 |
| 126 | 2235 CNS_fraction = 0.0; |
| 2236 char_O_CNS_fraction = 0; | |
| 167 | 2237 } |
| 116 | 2238 |
| 167 | 2239 ////////////////////////////////////////////////////////////////////////////// |
| 2240 // deco_calc_CNS_fraction | |
| 2241 // | |
| 116 | 2242 // new in v.101 |
| 2243 // optimized in v.102 : with new variables char_I_actual_ppO2 and actual_ppO2 | |
| 167 | 2244 // |
| 116 | 2245 // Input: char_I_actual_ppO2 |
| 292 | 2246 // char_I_step_is_1min : use 1min steps instead of 2sec. |
| 116 | 2247 // Output: char_O_CNS_fraction |
| 2248 // Uses and Updates: CNS_fraction | |
| 2249 // Uses: acutal_ppO2 | |
| 167 | 2250 // |
| 116 | 2251 void deco_calc_CNS_fraction(void) |
| 2252 { | |
| 167 | 2253 overlay float actual_ppO2; |
| 292 | 2254 overlay float time_factor = 1.0f; |
| 126 | 2255 RESET_C_STACK |
| 167 | 2256 |
| 237 | 2257 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.5 ); |
| 2258 assert( char_I_actual_ppO2 > 15 ); | |
| 2259 | |
| 126 | 2260 actual_ppO2 = (float)char_I_actual_ppO2 / 100.0; |
| 292 | 2261 if( char_I_step_is_1min ) |
| 2262 time_factor = 30.0f; | |
| 116 | 2263 |
| 126 | 2264 if (char_I_actual_ppO2 < 50) |
| 292 | 2265 ; // no changes |
| 126 | 2266 else if (char_I_actual_ppO2 < 60) |
| 292 | 2267 CNS_fraction += time_factor/(-54000.0 * actual_ppO2 + 54000.0); |
| 126 | 2268 else if (char_I_actual_ppO2 < 70) |
| 292 | 2269 CNS_fraction += time_factor/(-45000.0 * actual_ppO2 + 48600.0); |
| 126 | 2270 else if (char_I_actual_ppO2 < 80) |
| 292 | 2271 CNS_fraction += time_factor/(-36000.0 * actual_ppO2 + 42300.0); |
| 126 | 2272 else if (char_I_actual_ppO2 < 90) |
| 292 | 2273 CNS_fraction += time_factor/(-27000.0 * actual_ppO2 + 35100.0); |
| 126 | 2274 else if (char_I_actual_ppO2 < 110) |
| 292 | 2275 CNS_fraction += time_factor/(-18000.0 * actual_ppO2 + 27000.0); |
| 126 | 2276 else if (char_I_actual_ppO2 < 150) |
| 292 | 2277 CNS_fraction += time_factor/(-9000.0 * actual_ppO2 + 17100.0); |
| 126 | 2278 else if (char_I_actual_ppO2 < 160) |
| 292 | 2279 CNS_fraction += time_factor/(-22500.0 * actual_ppO2 + 37350.0); |
| 126 | 2280 else if (char_I_actual_ppO2 < 165) |
| 292 | 2281 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 | 2282 else if (char_I_actual_ppO2 < 170) |
| 292 | 2283 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
| 126 | 2284 else if (char_I_actual_ppO2 < 175) |
| 292 | 2285 CNS_fraction += time_factor*0.00136; |
| 126 | 2286 else if (char_I_actual_ppO2 < 180) |
| 292 | 2287 CNS_fraction += time_factor*0.00180; |
| 126 | 2288 else if (char_I_actual_ppO2 < 185) |
| 292 | 2289 CNS_fraction += time_factor*0.00237; |
| 126 | 2290 else if (char_I_actual_ppO2 < 190) |
| 292 | 2291 CNS_fraction += time_factor*0.00310; |
| 126 | 2292 else if (char_I_actual_ppO2 < 195) |
| 292 | 2293 CNS_fraction += time_factor*0.00401; |
| 126 | 2294 else if (char_I_actual_ppO2 < 200) |
| 292 | 2295 CNS_fraction += time_factor*0.00517; |
| 126 | 2296 else if (char_I_actual_ppO2 < 230) |
| 292 | 2297 CNS_fraction += time_factor*0.0209; |
| 126 | 2298 else |
| 292 | 2299 CNS_fraction += time_factor*0.0482; // value for 2.5 |
| 116 | 2300 |
| 126 | 2301 if (CNS_fraction > 2.5) |
| 2302 CNS_fraction = 2.5; | |
| 2303 if (CNS_fraction < 0.0) | |
| 2304 CNS_fraction = 0.0; | |
| 2305 | |
| 2306 char_O_CNS_fraction = (char)((CNS_fraction + 0.005)* 100.0); | |
| 167 | 2307 } |
| 116 | 2308 |
| 167 | 2309 ////////////////////////////////////////////////////////////////////////////// |
| 2310 // deco_calc_CNS_decrease_15min | |
| 2311 // | |
| 116 | 2312 // new in v.101 |
| 167 | 2313 // |
| 116 | 2314 // calculates the half time of 90 minutes in 6 steps of 15 min |
| 200 | 2315 // (Used in sleepmode, for low battery mode). |
| 167 | 2316 // |
| 116 | 2317 // Output: char_O_CNS_fraction |
| 2318 // Uses and Updates: CNS_fraction | |
| 167 | 2319 // |
| 116 | 2320 void deco_calc_CNS_decrease_15min(void) |
| 2321 { | |
| 237 | 2322 RESET_C_STACK |
| 2323 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.5 ); | |
| 2324 | |
| 126 | 2325 CNS_fraction = 0.890899 * CNS_fraction; |
| 167 | 2326 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); |
| 2327 } | |
| 116 | 2328 |
| 167 | 2329 ////////////////////////////////////////////////////////////////////////////// |
| 2330 // deco_calc_percentage | |
| 2331 // | |
| 116 | 2332 // new in v.101 |
| 167 | 2333 // |
| 116 | 2334 // calculates int_I_temp * char_I_temp / 100 |
| 2335 // output is int_I_temp | |
| 200 | 2336 // |
| 2337 // Used to compute NoFly remaining time. | |
|
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2338 // |
| 116 | 2339 void deco_calc_percentage(void) |
| 2340 { | |
|
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2341 RESET_C_STACK |
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2342 |
| 237 | 2343 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
| 2344 assert( 0 <= int_I_temp && int_I_temp < 2880 ); // Less than 48h... | |
| 2345 | |
|
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2346 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
| 237 | 2347 |
| 302 | 2348 assert( int_I_temp < 2880 ); // Less than 48h... |
|
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2349 } |
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2350 |
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2351 |
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2352 ////////////////////////////////////////////////////////////////////////////// |
|
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2353 // deco_gas_volumes |
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2354 // |
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2355 // new in v.111 |
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2356 // |
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2357 // calculates volumes for each gas. |
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2358 // |
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2359 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
|
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2360 // Gas list. |
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2361 // char_I_first_gas is the bottom gas. |
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2362 // decoplan (char_O_deco_depth, char_O_deco_time). |
|
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2363 // CF#54 == TRUE if shallowest stop first. |
|
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2364 // CF#56 == bottom deci-liters/minutes (0.5 .. 50.0) or bar/min. |
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2365 // CF#57 == deco deci-liters/minutes (0.5 .. 50.0) or bar/min. |
| 224 | 2366 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
|
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2367 // |
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2368 void deco_gas_volumes(void) |
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2369 { |
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2370 overlay float volumes[5]; |
| 265 | 2371 overlay float bottom_usage, ascent_usage; |
|
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2372 overlay unsigned char i, deepest_first; |
| 241 | 2373 overlay unsigned char gas; |
|
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2374 RESET_C_STACK |
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2375 |
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2376 //---- initialize with bottom consumption -------------------------------- |
|
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2377 for(i=0; i<5; ++i) // Nothing yet... |
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2378 volumes[i] = 0.0; |
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2379 |
| 241 | 2380 assert(1 <= char_I_first_gas && char_I_first_gas <= 5); |
| 2381 gas = char_I_first_gas - 1; | |
| 2382 | |
| 265 | 2383 bottom_usage = read_custom_function(56) * 0.1; |
| 2384 if( bottom_usage > 0.0 ) | |
| 2385 volumes[gas] | |
| 2386 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
| 2387 * char_I_bottom_time // in minutes. | |
| 2388 * bottom_usage; // In liter/minutes. | |
| 2389 else | |
| 2390 volumes[gas] = 65535.0; | |
|
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2391 |
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2392 //---- Ascent usage ------------------------------------------------------ |
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2393 |
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2394 deepest_first = read_custom_function(54) == 0; |
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2395 ascent_usage = read_custom_function(57) * 0.1; // In liter/minutes. |
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2396 |
| 224 | 2397 // Usage up to the first stop: |
| 2398 // - computed at MAX depth (easier, safer), | |
|
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2399 // - with an ascent speed of 10m/min. |
| 224 | 2400 // - with ascent litter / minutes. |
|
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2401 // - still using bottom gas: |
| 265 | 2402 if( ascent_usage > 0.0 ) |
| 2403 volumes[gas] | |
| 2404 += (char_I_bottom_depth*0.1 + 1.0) // Depth -> bar | |
| 2405 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 // ascent time (min) | |
| 2406 * ascent_usage; // Consumption ( xxx / min @ 1 bar) | |
| 2407 else | |
| 2408 volumes[gas] = 65535.0; | |
|
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2409 |
|
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2410 for(i=0; i<32; ++i) |
|
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2411 { |
| 241 | 2412 overlay unsigned char j; |
|
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2413 overlay unsigned char depth, time, ascent; |
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2414 |
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2415 // Manage stops in reverse order (CF#54) |
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2416 if( deepest_first ) |
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2417 { |
| 241 | 2418 time = char_O_deco_time[i]; |
|
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2419 if( time == 0 ) break; // End of table: done. |
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2420 |
|
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2421 ascent = depth = char_O_deco_depth[i] & 0x7F; |
|
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2422 if( i < 31 ) |
|
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2423 ascent -= char_O_deco_depth[i+1] & 0x7F; |
|
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2424 } |
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2425 else |
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2426 { |
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2427 time = char_O_deco_time[31-i]; |
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2428 if( time == 0 ) continue; // not yet: still searh table. |
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2429 |
|
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2430 ascent = depth = char_O_deco_depth[31-i] & 0x7F; |
|
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2431 if( i < 31 ) |
|
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2432 ascent -= char_O_deco_depth[30-i] & 0x7F; |
|
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2433 } |
|
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2434 |
|
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2435 // Gas switch depth ? |
| 241 | 2436 for(j=0; j<5; ++j) |
|
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2437 { |
|
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2438 if( depth <= char_I_deco_gas_change[j] ) |
| 241 | 2439 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
| 224 | 2440 gas = j; |
|
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2441 } |
|
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2442 |
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2443 // usage during stop: |
| 224 | 2444 // Note: because first gas is not in there, increment gas+1 |
| 265 | 2445 if( ascent_usage > 0.0 ) |
| 2446 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. | |
| 2447 * time // in minutes. | |
| 2448 * ascent_usage // in xxx / min @ 1bar. | |
| 2449 // Plus usage during ascent to the next stop, at 10m/min. | |
| 2450 + (depth*0.1 + 1.0) | |
|
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2451 * ascent*0.1 // metre --> min |
| 265 | 2452 * ascent_usage; |
| 2453 else | |
| 2454 volumes[gas] = 65535.0; | |
|
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2455 } |
|
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2456 |
|
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2457 //---- convert results for the ASM interface ----------------------------- |
|
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2458 for(i=0; i<5; ++i) |
| 224 | 2459 if( volumes[i] > 6553.4 ) |
| 2460 int_O_gas_volumes[i] = 65535; | |
|
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2461 else |
| 224 | 2462 int_O_gas_volumes[i] = (unsigned short)(volumes[i]*10.0 + 0.5); |
| 116 | 2463 } |
| 2464 | |
| 167 | 2465 ////////////////////////////////////////////////////////////////////////////// |
| 2466 | |
| 116 | 2467 void deco_push_tissues_to_vault(void) |
| 2468 { | |
| 167 | 2469 overlay unsigned char x; |
|
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2470 RESET_C_STACK |
| 167 | 2471 |
| 116 | 2472 cns_vault = CNS_fraction; |
| 167 | 2473 for (x=0;x<32;x++) |
| 2474 pres_tissue_vault[x] = pres_tissue[x]; | |
| 116 | 2475 } |
| 167 | 2476 |
| 116 | 2477 void deco_pull_tissues_from_vault(void) |
| 2478 { | |
| 167 | 2479 overlay unsigned char x; |
|
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2480 RESET_C_STACK |
| 167 | 2481 |
| 2482 for (x=0;x<32;x++) | |
| 2483 pres_tissue[x] = pres_tissue_vault[x]; | |
| 292 | 2484 |
| 2485 // Restore both CNS variable, too. | |
| 2486 CNS_fraction = cns_vault; | |
| 2487 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); | |
| 116 | 2488 } |
| 2489 | |
| 167 | 2490 ////////////////////////////////////////////////////////////////////////////// |
| 2491 // | |
| 184 | 2492 #ifndef CROSS_COMPILE |
| 2493 void main() {} | |
| 2494 #endif |