Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 224:49c90c5d9603
Gas usage
+ Show after last page of decoplan.
+ Units in 0.1 litters (or bars), hence 16bits.
+ Define CF#56 and CF#57, defaults to 20.0 l/min.
+ Go RED if volume > 6553.5 (saturated).
+ Calculate gas usage at bottom of ascent (safe bet).
+ Fix when first gas is not Gas1.
+ BUGFIX gas usage: first gas is not in the sorted gaslist (in general).
KNOWN BUG: wrong result if the gaslist is not sorted, or first gas do have a depth > 0.
| author | JeanDo |
|---|---|
| date | Thu, 03 Mar 2011 15:16:23 +0100 |
| parents | 638f8e17bd51 |
| children | 2dc4a7340510 |
| 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. |
| 217 | 73 // 2011/02/24: [jDG] Fixed inconsistencies introduced by gas switch delays. |
| 116 | 74 // |
| 167 | 75 // TODO: |
| 76 // + Allow to abort MD2 calculation (have to restart next time). | |
| 77 // | |
| 78 // Literature: | |
| 200 | 79 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
| 116 | 80 // 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 |
| 81 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
| 82 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
| 83 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
| 84 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
| 167 | 85 // |
| 86 // | |
| 116 | 87 |
| 88 // ********************* | |
| 89 // ** I N C L U D E S ** | |
| 90 // ********************* | |
| 91 #include <math.h> | |
| 167 | 92 |
| 192 | 93 // *********************************************** |
| 94 // ** V A R I A B L E S D E F I N I T I O N S ** | |
| 95 // *********************************************** | |
| 96 | |
| 97 #include "p2_definitions.h" | |
| 98 #include "shared_definitions.h" | |
| 99 | |
| 200 | 100 // Water vapour partial pressure in the lumb. |
| 101 static const float ppWVapour = 0.0627; | |
| 102 | |
| 167 | 103 // ************************* |
| 104 // ** P R O T O T Y P E S ** | |
| 105 // ************************* | |
| 106 | |
| 107 static void calc_hauptroutine(void); | |
| 108 static void calc_nullzeit(void); | |
| 109 | |
| 192 | 110 static void calc_tissue(PARAMETER unsigned char period); |
| 111 static void calc_limit(PARAMETER float GF_current); | |
| 112 | |
| 167 | 113 static void clear_tissue(void); |
| 114 static void calc_ascenttime(void); | |
| 115 static void update_startvalues(void); | |
|
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116 static void clear_deco_table(void); |
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117 static void update_deco_table(void); |
| 192 | 118 |
| 119 static void backup_sim_pres_tissue(void); | |
| 120 static void restore_sim_pres_tissue(void); | |
| 121 static void sim_tissue(PARAMETER unsigned char period); | |
| 122 static void sim_limit(PARAMETER float GF_current); | |
| 167 | 123 static void calc_gradient_factor(void); |
| 124 static void calc_wo_deco_step_1_min(void); | |
| 125 | |
| 126 static void calc_hauptroutine_data_input(void); | |
| 127 static void calc_hauptroutine_update_tissues(void); | |
| 128 static void calc_hauptroutine_calc_deco(void); | |
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129 static void sim_ascent_to_first_stop(void); |
| 167 | 130 |
| 217 | 131 static void deepest_gas_switch(void); |
| 132 static void best_gas_switch(void); | |
| 133 static void set_gas(void); | |
| 134 | |
| 171 | 135 static void calc_nextdecodepth(void); |
| 116 | 136 |
| 200 | 137 //---- Bank 4 parameters ----------------------------------------------------- |
| 163 | 138 #pragma udata bank4=0x400 |
| 116 | 139 |
| 140 static float temp_limit; | |
| 141 static float GF_low; | |
| 142 static float GF_high; | |
| 143 static float GF_delta; | |
| 192 | 144 static unsigned char low_depth; // Depth of deepest stop |
| 145 static float locked_GF_step; // GF_delta / low_depth | |
| 146 | |
| 147 static unsigned char temp_depth_limit; | |
| 171 | 148 |
| 192 | 149 // Simulation context: used to predict ascent. |
| 150 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 151 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 116 | 152 |
| 192 | 153 // Real context: what we are doing now. |
| 154 static float calc_lead_tissue_limit; // | |
| 116 | 155 |
|
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156 static unsigned char internal_deco_time[32]; |
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157 static unsigned char internal_deco_depth[32]; |
| 116 | 158 |
| 159 static float cns_vault; | |
| 160 static float pres_tissue_vault[32]; | |
| 161 | |
| 163 | 162 //---- Bank 5 parameters ----------------------------------------------------- |
| 163 #pragma udata bank5=0x500 | |
| 164 | |
| 167 | 165 static unsigned char ci; |
| 116 | 166 static float pres_respiration; |
| 167 static float pres_surface; | |
| 168 static float temp_deco; | |
| 200 | 169 static float ppO2; |
| 170 static float ppHe; | |
| 116 | 171 static float temp_tissue; |
| 200 | 172 static float N2_ratio; // Breathed gas nitrogen ratio. |
| 173 static float He_ratio; // Breathed gas helium ratio. | |
| 174 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
| 175 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
| 176 static float var_He_a; // Bühlmann a, for current He tissue. | |
| 177 static float var_He_b; // Bühlmann b, for current He tissue. | |
| 178 static float var_N2_e; // Exposition, for current N2 tissue. | |
| 179 static float var_He_e; // Exposition, for current He tissue. | |
| 116 | 180 |
| 164 | 181 static float pres_diluent; // new in v.101 |
| 182 static float const_ppO2; // new in v.101 | |
| 183 static float deco_ppO2_change; // new in v.101 | |
| 184 static float deco_ppO2; // new in v.101 | |
| 116 | 185 |
| 200 | 186 static unsigned char sim_gas_last_used; // Last used gas, to detected a gas switch. |
| 203 | 187 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
| 188 static unsigned short sim_dive_mins; // Simulated dive time. | |
| 200 | 189 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
| 190 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
| 191 static float CNS_fraction; // new in v.101 | |
| 192 static float float_saturation_multiplier; // new in v.101 | |
| 193 static float float_desaturation_multiplier; // new in v.101 | |
| 167 | 194 static float float_deco_distance; // new in v.101 |
| 195 static char flag_in_divemode; // new in v.108 | |
| 196 | |
| 212 | 197 static unsigned char deco_gas_change1; // new in v.101 |
| 198 static unsigned char deco_gas_change2; // new in v.109 | |
| 199 static unsigned char deco_gas_change3; // new in v.109 | |
| 200 static unsigned char deco_gas_change4; // new in v.109 | |
| 201 static unsigned char deco_gas_change5; // new in v.109 | |
| 167 | 202 |
| 163 | 203 //---- Bank 6 parameters ----------------------------------------------------- |
| 204 #pragma udata bank6=0x600 | |
| 116 | 205 |
| 197 | 206 float pres_tissue[32]; |
| 207 float pres_tissue_limit[16]; | |
| 208 float sim_pres_tissue_limit[16]; | |
| 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]; | |
| 167 | 322 DBG_deco_gas_change = deco_gas_change1; |
| 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 |
| 430 if( DBG_deco_gas_change != deco_gas_change1 | |
| 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 | |
| 203 | 474 static short read_custom_function(PARAMETER unsigned char cf) |
| 167 | 475 { |
| 184 | 476 #ifdef CROSS_COMPILE |
| 477 extern unsigned short custom_functions[]; | |
| 478 return custom_functions[cf]; | |
| 479 #else | |
| 167 | 480 extern unsigned char hi, lo; |
| 481 extern void getcustom15(); | |
| 482 _asm | |
| 483 movff cf,WREG | |
| 484 call getcustom15,0 | |
| 485 movff lo,PRODL | |
| 486 movff hi,PRODH | |
| 487 _endasm | |
| 184 | 488 #endif |
| 167 | 489 } |
| 490 | |
| 491 ////////////////////////////////////////////////////////////////////////////// | |
| 165 | 492 // read buhlmann tables for compatriment ci |
| 167 | 493 // If period == 0 : 2sec interval |
| 494 // 1 : 1 min interval | |
| 495 // 2 : 10 min interval. | |
| 184 | 496 static void read_buhlmann_coefficients(PARAMETER char period) |
| 165 | 497 { |
| 184 | 498 #ifndef CROSS_COMPILE |
| 167 | 499 // Note: we don't use far rom pointer, because the |
| 500 // 24 bits is to complex, hence we have to set | |
| 501 // the UPPER page ourself... | |
| 502 // --> Set zero if tables are moved to lower pages ! | |
| 503 _asm | |
| 504 movlw 1 | |
| 505 movwf TBLPTRU,0 | |
| 506 _endasm | |
| 184 | 507 #endif |
| 197 | 508 assert( 0 <= ci && ci < 16 ); |
| 167 | 509 |
| 165 | 510 var_N2_a = buhlmann_a[ci]; |
| 511 var_N2_b = buhlmann_b[ci]; | |
| 167 | 512 var_He_a = (buhlmann_a+16)[ci]; |
| 513 var_He_b = (buhlmann_b+16)[ci]; | |
| 514 | |
| 165 | 515 // Check reading consistency: |
| 516 if( (var_N2_a < 0.231) | |
| 517 || (var_N2_a > 1.27) | |
| 518 || (var_N2_b < 0.504) | |
| 519 || (var_N2_b > 0.966) | |
| 520 || (var_He_a < 0.510) | |
| 521 || (var_He_a > 1.75) | |
| 522 || (var_He_b < 0.423) | |
| 523 || (var_He_b > 0.927) | |
| 524 ) | |
| 525 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 167 | 526 |
| 165 | 527 // Integration intervals. |
| 167 | 528 switch(period) |
| 165 | 529 { |
| 167 | 530 case -1://---- no interval ----------------------------------------------- |
| 531 var_N2_e = var_He_e = 0.0; | |
| 532 break; | |
| 533 | |
| 165 | 534 case 0: //---- 2 sec ----------------------------------------------------- |
| 535 var_N2_e = e2secs[ci]; | |
| 167 | 536 var_He_e = (e2secs+16)[ci]; |
| 165 | 537 |
| 538 // Check reading consistency: | |
| 539 if( (var_N2_e < 0.0000363) | |
| 540 || (var_N2_e > 0.00577) | |
| 541 || (var_He_e < 0.0000961) | |
| 542 || (var_He_e > 0.150) | |
| 543 ) | |
| 544 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 545 | |
| 546 break; | |
| 547 | |
| 548 case 1: //---- 1 min ----------------------------------------------------- | |
| 549 var_N2_e = e1min[ci]; | |
| 167 | 550 var_He_e = (e1min+16)[ci]; |
| 165 | 551 |
| 552 // Check reading consistency: | |
| 553 if( (var_N2_e < 1.09E-3) | |
| 554 || (var_N2_e > 0.1592) | |
| 555 || (var_He_e < 0.00288) | |
| 556 || (var_He_e > 0.3682) | |
| 557 ) | |
| 558 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 559 | |
| 560 break; | |
| 561 | |
| 562 case 2: //---- 10 min ---------------------------------------------------- | |
| 563 var_N2_e = e10min[ci]; | |
| 167 | 564 var_He_e = (e10min+16)[ci]; |
| 165 | 565 |
| 566 // Check reading consistency: | |
| 567 if( (var_N2_e < 0.01085) | |
| 568 || (var_N2_e > 0.82323) | |
| 569 || (var_He_e < 0.02846) | |
| 570 || (var_He_e > 0.98986) | |
| 571 ) | |
| 572 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 573 | |
| 574 break; | |
| 197 | 575 |
| 576 default: | |
| 577 assert(0); // Never go there... | |
| 165 | 578 } |
| 579 } | |
| 580 | |
| 581 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 582 // calc_next_decodepth_GF |
| 165 | 583 // |
| 116 | 584 // new in v.102 |
| 165 | 585 // |
| 116 | 586 // INPUT, changing during dive: |
| 192 | 587 // low_depth |
| 167 | 588 // |
| 116 | 589 // INPUT, fixed during dive: |
| 167 | 590 // pres_surface |
| 591 // GF_delta | |
| 592 // GF_high | |
| 593 // GF_low | |
| 171 | 594 // char_I_depth_last_deco |
| 167 | 595 // float_deco_distance |
| 596 // | |
| 116 | 597 // OUTPUT |
| 171 | 598 // locked_GF_step |
| 167 | 599 // temp_depth_limt |
| 192 | 600 // low_depth |
| 167 | 601 // |
| 171 | 602 static void calc_nextdecodepth(void) |
| 167 | 603 { |
| 212 | 604 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
| 116 | 605 if (char_I_deco_model == 1) |
| 606 { | |
| 192 | 607 // Recompute leading gas limit, at current depth: |
| 608 overlay float depth = (temp_deco - pres_surface) / 0.09995; | |
| 609 assert( depth >= 0.0 ); | |
| 203 | 610 assert( low_depth < 255 ); |
| 167 | 611 |
| 192 | 612 if( depth > low_depth ) |
| 613 sim_limit( GF_low ); | |
| 614 else | |
| 615 sim_limit( GF_high - depth * locked_GF_step ); | |
| 616 | |
| 617 // Stops are needed ? | |
| 618 if( sim_lead_tissue_limit > pres_surface ) | |
| 619 { | |
| 620 // Deepest stop, in meter. | |
| 203 | 621 overlay unsigned char first_stop = 3 * (short)(0.99 + (sim_lead_tissue_limit - pres_surface) / 0.29985); |
| 192 | 622 assert( first_stop < 128 ); |
| 171 | 623 |
| 212 | 624 // Apply correction for the shallowest stop. |
| 192 | 625 if( first_stop == 3 ) // new in v104 |
| 626 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 171 | 627 |
| 192 | 628 // Check all stops until one is higher than tolerated presure |
| 629 while(first_stop > 0) | |
| 630 { | |
| 631 overlay unsigned char next_stop; // Next index (0..30) | |
| 632 overlay float pres_stop; // Next depth (0m..90m) | |
| 171 | 633 |
| 192 | 634 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
| 635 next_stop = 0; | |
| 216 | 636 else if( first_stop == 6 ) |
| 637 next_stop = char_I_depth_last_deco; | |
| 192 | 638 else |
| 639 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 167 | 640 |
| 192 | 641 pres_stop = next_stop * 0.09995 // Meters to bar |
| 642 + pres_surface; | |
| 643 | |
| 212 | 644 // Keep GF_low until a first stop depth is found: |
| 645 if( next_stop >= low_depth ) | |
| 646 sim_limit( GF_low ); | |
| 647 else | |
| 648 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 649 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 650 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 171 | 651 |
| 192 | 652 // upper limit (lowest pressure tolerated): |
| 653 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 654 break; | |
| 655 | |
| 656 // Else, validate that stop and loop... | |
| 657 first_stop = next_stop; | |
| 658 } | |
| 171 | 659 |
| 212 | 660 // Is it a new deepest first stop ? If yes this is the reference for |
| 661 // the varying gradient factor. So reset that: | |
| 662 if( first_stop > low_depth ) | |
| 663 { | |
| 664 // Store the deepest stop depth, as reference for GF_low. | |
| 665 low_depth = first_stop; | |
| 666 locked_GF_step = GF_delta / low_depth; | |
| 667 } | |
| 668 | |
| 669 // next stop is the last validated depth found, aka first_stop | |
| 192 | 670 temp_depth_limit = first_stop; // Stop depth, in meter. |
| 671 } | |
| 171 | 672 else |
| 192 | 673 temp_depth_limit = 0; // stop depth, in meter. |
| 116 | 674 } |
| 167 | 675 else //---- ZH-L16 model ------------------------------------------------- |
| 116 | 676 { |
| 192 | 677 overlay float pres_gradient; |
| 678 | |
| 679 // Original model | |
| 116 | 680 // optimized in v.101 |
| 171 | 681 // char_I_depth_last_deco included in v.101 |
| 116 | 682 |
| 192 | 683 // Compute sim_lead_tissue_limit too, but just once. |
| 684 sim_limit(1.0); | |
| 685 | |
| 686 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 167 | 687 if (pres_gradient >= 0) |
| 116 | 688 { |
| 192 | 689 pres_gradient /= 0.29985; // Bar --> stop number; |
| 203 | 690 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> meter : depth for deco |
| 212 | 691 if (temp_depth_limit != 0) // At surface ? |
| 116 | 692 { |
| 171 | 693 if (temp_depth_limit < char_I_depth_last_deco) // Implement last stop at 4m/5m/6m... |
| 694 temp_depth_limit = char_I_depth_last_deco; | |
| 695 } | |
| 696 } | |
| 116 | 697 else |
| 192 | 698 temp_depth_limit = 0; // stop depth, in meter. |
| 171 | 699 } |
| 212 | 700 |
| 217 | 701 //---- Check gas change -------------------------------------------------- |
| 702 best_gas_switch(); // Update temp_depth_limit if there is a change, | |
| 212 | 703 // Calculate N2_ratio and He_ratio too. |
| 167 | 704 } |
| 116 | 705 |
| 167 | 706 ////////////////////////////////////////////////////////////////////////////// |
|
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707 // copy_deco_table |
| 167 | 708 // |
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709 // Buffer the stops, once computed, so we can continue to display them |
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710 // while computing the next set. |
| 167 | 711 // |
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712 static void copy_deco_table(void) |
| 116 | 713 { |
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714 // Copy depth of the first (deepest) stop, because when reversing |
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715 // order, it will be hard to find... |
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716 char_O_first_deco_depth = internal_deco_depth[0]; |
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717 char_O_first_deco_time = internal_deco_time [0]; |
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718 |
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719 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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720 { |
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721 overlay unsigned char x, y; |
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722 |
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723 //---- First: search the first non-null depth |
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724 for(x=31; x != 0; --x) |
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725 if( internal_deco_depth[x] != 0 ) break; |
| 116 | 726 |
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727 //---- Second: copy to output table (in reverse order) |
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728 for(y=0; y<32; y++, --x) |
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729 { |
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730 char_O_deco_depth[y] = internal_deco_depth[x]; |
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731 char_O_deco_time [y] = internal_deco_time [x]; |
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732 |
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733 // Stop only once the last transfer is done. |
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734 if( x == 0 ) break; |
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735 } |
| 116 | 736 |
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737 //---- Third: fill table end with null |
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738 for(y++; y<32; y++) |
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739 { |
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740 char_O_deco_time [y] = 0; |
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741 char_O_deco_depth[y] = 0; |
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742 } |
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743 } |
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744 else //---- Straight copy ------------------------------------------------ |
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745 { |
| 167 | 746 overlay unsigned char x; |
| 747 | |
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748 for(x=0; x<32; x++) |
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749 { |
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750 char_O_deco_depth[x] = internal_deco_depth[x]; |
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751 char_O_deco_time [x] = internal_deco_time [x]; |
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752 } |
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753 } |
| 167 | 754 } |
| 116 | 755 |
| 167 | 756 ////////////////////////////////////////////////////////////////////////////// |
| 116 | 757 // temp_tissue_safety // |
| 167 | 758 // |
| 116 | 759 // outsourced in v.102 |
| 167 | 760 // |
| 761 // Apply safety factors for brand ZH-L16 model. | |
| 762 // | |
| 763 static void temp_tissue_safety(void) | |
| 116 | 764 { |
| 197 | 765 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
| 766 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 767 | |
| 167 | 768 if( char_I_deco_model == 0 ) |
| 116 | 769 { |
| 770 if (temp_tissue < 0.0) | |
| 126 | 771 temp_tissue *= float_desaturation_multiplier; |
| 116 | 772 else |
| 126 | 773 temp_tissue *= float_saturation_multiplier; |
| 116 | 774 } |
| 167 | 775 } |
| 116 | 776 |
| 167 | 777 ////////////////////////////////////////////////////////////////////////////// |
| 778 ////////////////////////////////////////////////////////////////////////////// | |
| 116 | 779 // ** THE JUMP-IN CODE ** |
| 780 // ** for the asm code ** | |
| 167 | 781 ////////////////////////////////////////////////////////////////////////////// |
| 782 ////////////////////////////////////////////////////////////////////////////// | |
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783 |
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784 void fillDataStack(void) |
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785 { |
| 184 | 786 #ifndef CROSS_COMPILE |
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787 _asm |
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788 LFSR 1,C_STACK |
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789 MOVLW 0xCC |
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790 loop: MOVWF POSTINC1,0 |
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791 TSTFSZ FSR1L,0 |
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792 BRA loop |
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793 |
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794 LFSR 1,C_STACK |
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795 LFSR 2,C_STACK |
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796 _endasm |
| 184 | 797 #endif |
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798 } |
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799 |
| 167 | 800 ////////////////////////////////////////////////////////////////////////////// |
|
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801 // When calling C code from ASM context, the data stack pointer and |
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802 // frames should be reset. Bank3 is dedicated to the stack (see the |
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803 // .lkr script). |
| 184 | 804 #ifdef CROSS_COMPILE |
| 805 # define RESET_C_STACK | |
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806 #else |
| 184 | 807 # ifdef __DEBUG |
| 808 # define RESET_C_STACK fillDataStack(); | |
| 809 # else | |
| 810 # define RESET_C_STACK \ | |
| 811 _asm \ | |
| 812 LFSR 1, C_STACK \ | |
| 813 LFSR 2, C_STACK \ | |
| 814 _endasm | |
| 815 # endif | |
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816 #endif |
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817 |
| 167 | 818 ////////////////////////////////////////////////////////////////////////////// |
|
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819 // Called every 2 seconds during diving. |
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820 // update tissues every time. |
| 184 | 821 // |
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822 // Every 6 seconds (or slower when TTS > 16): |
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823 // - update deco table (char_O_deco_time/depth) with new values. |
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824 // - update ascent time, |
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825 // - set status to zero (so we can check there is new results). |
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826 // |
| 116 | 827 void deco_calc_hauptroutine(void) |
| 828 { | |
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829 RESET_C_STACK |
| 116 | 830 calc_hauptroutine(); |
| 831 int_O_desaturation_time = 65535; | |
| 832 } | |
| 833 | |
| 167 | 834 ////////////////////////////////////////////////////////////////////////////// |
| 184 | 835 // Reset decompression model: |
| 836 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 837 // + Reset last stop to 0m | |
| 838 // + Reset all model output. | |
| 116 | 839 void deco_clear_tissue(void) |
| 840 { | |
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841 RESET_C_STACK |
| 116 | 842 clear_tissue(); |
| 843 } | |
| 844 | |
| 167 | 845 ////////////////////////////////////////////////////////////////////////////// |
| 846 | |
| 116 | 847 void deco_calc_wo_deco_step_1_min(void) |
| 848 { | |
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849 RESET_C_STACK |
| 116 | 850 calc_wo_deco_step_1_min(); |
| 851 deco_calc_desaturation_time(); | |
| 852 } | |
| 853 | |
| 167 | 854 ////////////////////////////////////////////////////////////////////////////// |
| 855 | |
| 116 | 856 void deco_debug(void) |
| 857 { | |
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858 RESET_C_STACK |
| 116 | 859 } |
| 860 | |
| 167 | 861 ////////////////////////////////////////////////////////////////////////////// |
| 217 | 862 // Find deepest available gas. |
| 201 | 863 // |
| 217 | 864 // Input: deco_gas_change* |
| 212 | 865 // sim_gas_delay, sim_gas_last_used, sim_dive_mins. |
| 866 // | |
| 217 | 867 // Output: temp_depth_limit, sim_gas_delay, sim_gas_last_used IFF the is a switch. |
| 212 | 868 // |
| 217 | 869 static void deepest_gas_switch(void) |
| 201 | 870 { |
| 203 | 871 overlay unsigned char temp_gas_switch = 0; |
| 212 | 872 overlay unsigned char switch_deco = 0; |
| 201 | 873 |
| 874 if (char_I_const_ppO2 == 0) | |
| 875 { | |
| 876 // Keep selecting the best gas during the ascent simulation. | |
| 212 | 877 // Add a one meter margin in depth comparaison. |
| 878 if( deco_gas_change1 && ((temp_depth_limit-1) <= deco_gas_change1)) | |
| 201 | 879 { |
| 880 temp_gas_switch = 1; | |
| 881 switch_deco = deco_gas_change1; | |
| 217 | 882 } |
| 883 else if(deco_gas_change2 && ((temp_depth_limit-1) <= deco_gas_change2)) | |
| 201 | 884 { |
| 885 temp_gas_switch = 2; | |
| 886 switch_deco = deco_gas_change2; | |
| 217 | 887 } |
| 888 else if(deco_gas_change3 && ((temp_depth_limit-1) <= deco_gas_change3)) | |
| 201 | 889 { |
| 890 temp_gas_switch = 3; | |
| 891 switch_deco = deco_gas_change3; | |
| 892 } | |
| 217 | 893 else if(deco_gas_change4 && ((temp_depth_limit-1) <= deco_gas_change4)) |
| 201 | 894 { |
| 895 temp_gas_switch = 4; | |
| 896 switch_deco = deco_gas_change4; | |
| 897 } | |
| 217 | 898 else if(deco_gas_change5 && ((temp_depth_limit-1) <= deco_gas_change5)) |
| 201 | 899 { |
| 900 temp_gas_switch = 5; | |
| 901 switch_deco = deco_gas_change5; | |
| 902 } | |
| 903 } | |
| 904 | |
| 203 | 905 // If there is a better gas available |
| 906 if( temp_gas_switch ) | |
| 201 | 907 { |
| 212 | 908 // Should restart gas-switch delay only when gas do changes... |
| 203 | 909 // sim_gas_last_used: used to detect just once in each ascent simu. |
| 910 // N2_ratio : used to detect when already breathing that gas. | |
| 217 | 911 if( temp_depth_limit != switch_deco |
| 912 && sim_gas_last_used < temp_gas_switch | |
| 913 && sim_gas_delay <= sim_dive_mins ) | |
| 203 | 914 { |
| 915 sim_gas_last_used = temp_gas_switch; | |
| 916 sim_gas_delay = read_custom_function(55); | |
| 201 | 917 |
| 203 | 918 // Apply depth correction ONLY if CF#55 is not null: |
| 919 if( sim_gas_delay > 0 ) | |
| 920 { | |
| 921 sim_gas_delay += sim_dive_mins; | |
| 212 | 922 temp_depth_limit = switch_deco; |
| 203 | 923 } |
| 201 | 924 } |
| 925 } | |
| 203 | 926 else |
| 927 sim_gas_delay = 0; | |
| 217 | 928 } |
| 929 | |
| 930 ////////////////////////////////////////////////////////////////////////////// | |
| 931 // Find best (shallowest) available gas. | |
| 932 // | |
| 933 // Input: deco_gas_change* | |
| 934 // sim_gas_delay, sim_gas_last_used, sim_dive_mins. | |
| 935 // | |
| 936 // Output: temp_depth_limit, sim_gas_delay, sim_gas_last_used IFF the is a switch. | |
| 937 // | |
| 938 static void best_gas_switch(void) | |
| 939 { | |
| 940 overlay unsigned char temp_gas_switch = 0; | |
| 941 overlay unsigned char switch_deco = 0; | |
| 942 | |
| 943 if (char_I_const_ppO2 == 0) | |
| 944 { | |
| 945 // Keep selecting the best gas during the ascent simulation. | |
| 946 // Add a one meter margin in depth comparaison. | |
| 947 if( deco_gas_change5 && ((temp_depth_limit-1) <= deco_gas_change5)) | |
| 948 { | |
| 949 temp_gas_switch = 5; | |
| 950 switch_deco = deco_gas_change5; | |
| 951 } | |
| 952 else if(deco_gas_change4 && ((temp_depth_limit-1) <= deco_gas_change4)) | |
| 953 { | |
| 954 temp_gas_switch = 4; | |
| 955 switch_deco = deco_gas_change4; | |
| 956 } | |
| 957 else if(deco_gas_change3 && ((temp_depth_limit-1) <= deco_gas_change3)) | |
| 958 { | |
| 959 temp_gas_switch = 3; | |
| 960 switch_deco = deco_gas_change3; | |
| 961 } | |
| 962 else if(deco_gas_change2 && ((temp_depth_limit-1) <= deco_gas_change2)) | |
| 963 { | |
| 964 temp_gas_switch = 2; | |
| 965 switch_deco = deco_gas_change2; | |
| 966 } | |
| 967 else if(deco_gas_change1 && ((temp_depth_limit-1) <= deco_gas_change1)) | |
| 968 { | |
| 969 temp_gas_switch = 1; | |
| 970 switch_deco = deco_gas_change1; | |
| 971 } | |
| 972 } | |
| 973 | |
| 974 // If there is a better gas available | |
| 975 if( temp_gas_switch ) | |
| 976 { | |
| 977 // Should restart gas-switch delay only when gas do changes... | |
| 978 // sim_gas_last_used: used to detect just once in each ascent simu. | |
| 979 // N2_ratio : used to detect when already breathing that gas. | |
| 980 if( sim_gas_last_used < temp_gas_switch | |
| 981 && sim_gas_delay <= sim_dive_mins ) | |
| 982 { | |
| 983 sim_gas_last_used = temp_gas_switch; | |
| 984 sim_gas_delay = read_custom_function(55); | |
| 985 | |
| 986 // Apply depth correction ONLY if CF#55 is not null: | |
| 987 if( sim_gas_delay > 0 ) | |
| 988 { | |
| 989 sim_gas_delay += sim_dive_mins; | |
| 990 temp_depth_limit = switch_deco; | |
| 991 } | |
| 992 } | |
| 993 } | |
| 994 else | |
| 995 sim_gas_delay = 0; | |
| 996 } | |
| 997 | |
| 998 ////////////////////////////////////////////////////////////////////////////// | |
| 999 // Calculate gas switches | |
| 1000 // | |
| 1001 // | |
| 1002 // Input: N2_ratio, He_ratio. | |
| 1003 // sim_gas_last_used | |
| 1004 // | |
| 1005 // Output: calc_N2_ratio, calc_He_ratio | |
| 1006 // | |
| 1007 static void set_gas(void) | |
| 1008 { | |
| 224 | 1009 assert( 0 <= sim_gas_last_used && sim_gas_last_used <= 5 ); |
| 217 | 1010 |
| 224 | 1011 if( sim_gas_last_used == 0 ) |
| 1012 { | |
| 1013 calc_N2_ratio = N2_ratio; | |
| 1014 calc_He_ratio = He_ratio; | |
| 1015 } | |
| 1016 else | |
| 1017 { | |
| 1018 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
| 1019 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
| 217 | 1020 } |
| 201 | 1021 |
| 1022 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
| 1023 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
| 1024 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
| 1025 } | |
| 1026 | |
| 1027 ////////////////////////////////////////////////////////////////////////////// | |
| 1028 // | |
| 212 | 1029 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
| 1030 // temp_deco : simulated respiration pressure + security offset (deco_distance) | |
| 1031 // Water-vapor pressure inside lumbs (ppWVapour). | |
| 1032 // | |
| 1033 // Output: ppO2, ppHe. | |
| 1034 // | |
| 1035 static void sim_alveolar_presures(void) | |
| 201 | 1036 { |
| 212 | 1037 overlay float deco_diluent = temp_deco; // new in v.101 |
| 1038 | |
| 1039 //---- CCR mode : deco gas switch ? -------------------------------------- | |
| 201 | 1040 if (char_I_const_ppO2 != 0) |
| 1041 { | |
| 212 | 1042 // In CCR mode, calc_XX_ratio == XX_ratio. |
| 1043 if( temp_deco > deco_ppO2_change ) | |
| 1044 deco_diluent = ((temp_deco - const_ppO2)/(calc_N2_ratio + calc_He_ratio)); | |
| 201 | 1045 else |
| 212 | 1046 deco_diluent = ((temp_deco - deco_ppO2)/(calc_N2_ratio + calc_He_ratio)); |
| 1047 | |
| 1048 if (deco_diluent > temp_deco) | |
| 1049 deco_diluent = temp_deco; | |
| 201 | 1050 } |
| 1051 | |
| 212 | 1052 // Take deco offset into account, but not at surface. |
| 1053 if( deco_diluent > pres_surface ) | |
| 1054 deco_diluent += float_deco_distance; | |
| 1055 | |
| 1056 if( deco_diluent > ppWVapour ) | |
| 201 | 1057 { |
| 1058 ppO2 = calc_N2_ratio * (deco_diluent - ppWVapour); | |
| 1059 ppHe = calc_He_ratio * (deco_diluent - ppWVapour); | |
| 1060 } | |
| 1061 else | |
| 1062 { | |
| 1063 ppO2 = 0.0; | |
| 1064 ppHe = 0.0; | |
| 1065 } | |
| 1066 assert( 0.0 <= ppO2 && ppO2 < 14.0 ); | |
| 1067 assert( 0.0 <= ppHe && ppHe < 14.0 ); | |
| 1068 } | |
| 1069 | |
| 1070 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 1071 // clear_tissue |
| 1072 // | |
| 165 | 1073 // optimized in v.101 (var_N2_a) |
| 167 | 1074 // |
| 1075 // preload tissues with standard pressure for the given ambient pressure. | |
| 1076 // Note: fixed N2_ratio for standard air. | |
| 201 | 1077 // |
| 167 | 1078 static void clear_tissue(void) |
| 116 | 1079 { |
| 1080 flag_in_divemode = 0; | |
| 1081 int_O_DBS_bitfield = 0; | |
| 1082 int_O_DBS2_bitfield = 0; | |
| 1083 int_O_DBG_pre_bitfield = 0; | |
| 1084 int_O_DBG_post_bitfield = 0; | |
| 1085 char_O_NDL_at_20mtr = 255; | |
| 1086 | |
| 167 | 1087 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
| 1088 N2_ratio = 0.7902; | |
| 212 | 1089 pres_respiration = int_I_pres_respiration * 0.001; |
| 164 | 1090 |
| 167 | 1091 for(ci=0; ci<16; ci++) |
| 126 | 1092 { |
| 197 | 1093 // cycle through the 16 Bühlmann tissues |
| 200 | 1094 overlay float p = N2_ratio * (pres_respiration - ppWVapour); |
| 164 | 1095 pres_tissue[ci] = p; |
| 197 | 1096 |
| 184 | 1097 read_buhlmann_coefficients(-1); |
| 165 | 1098 |
| 1099 p = (p - var_N2_a) * var_N2_b ; | |
| 164 | 1100 if( p < 0.0 ) |
| 1101 p = 0.0; | |
| 1102 pres_tissue_limit[ci] = p; | |
| 1103 | |
| 197 | 1104 // cycle through the 16 Bühlmann tissues for Helium |
| 167 | 1105 (pres_tissue+16)[ci] = 0.0; |
| 126 | 1106 } // for 0 to 16 |
| 116 | 1107 |
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1108 clear_deco_table(); |
| 126 | 1109 char_O_deco_status = 0; |
| 1110 char_O_nullzeit = 0; | |
| 168 | 1111 int_O_ascenttime = 0; |
| 126 | 1112 char_O_gradient_factor = 0; |
| 1113 char_O_relative_gradient_GF = 0; | |
| 197 | 1114 char_I_depth_last_deco = 0; // for compatibility with v.101pre_no_last_deco |
| 167 | 1115 } |
| 116 | 1116 |
| 167 | 1117 ////////////////////////////////////////////////////////////////////////////// |
| 1118 // calc_hauptroutine | |
| 1119 // | |
| 1120 // this is the major code in dive mode calculates: | |
| 116 | 1121 // the tissues, |
| 167 | 1122 // the bottom time, |
| 1123 // and simulates the ascend with all deco stops. | |
| 171 | 1124 // |
| 1125 // The deco_state sequence is : | |
| 1126 // 3 (at surface) | |
| 1127 // +---> 0 : calc nullzeit | |
| 1128 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 1129 // | +-> 1 : simulate up to 16min of stops. | |
| 1130 // | +------< not finished | |
| 1131 // +--------< finish | |
| 1132 // | |
| 167 | 1133 static void calc_hauptroutine(void) |
| 116 | 1134 { |
| 217 | 1135 static unsigned char backup_gas_used = 0; |
| 1136 static unsigned char backup_gas_delay = 0; | |
| 186 | 1137 |
| 116 | 1138 calc_hauptroutine_data_input(); |
| 1139 | |
| 1140 if(!flag_in_divemode) | |
| 1141 { | |
| 1142 flag_in_divemode = 1; | |
| 1143 create_dbs_set_dbg_and_ndl20mtr(); | |
| 1144 } | |
| 1145 else | |
| 1146 check_pre_dbg(); | |
| 1147 | |
| 1148 calc_hauptroutine_update_tissues(); | |
| 1149 calc_gradient_factor(); | |
| 1150 | |
| 167 | 1151 // toggle between calculation for nullzeit (bottom time), |
| 1152 // deco stops | |
| 1153 // and more deco stops (continue) | |
| 1154 switch( char_O_deco_status ) | |
| 116 | 1155 { |
| 186 | 1156 case 3: //---- At surface: start a new dive ------------------------------ |
| 1157 clear_deco_table(); | |
| 1158 copy_deco_table(); | |
| 200 | 1159 int_O_ascenttime = 0; // Reset DTR. |
| 1160 char_O_nullzeit = 0; // Reset bottom time. | |
| 1161 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. | |
| 201 | 1162 |
| 217 | 1163 // Values that should be reset just once for the full real dive. |
| 1164 // This is used to record the lowest stop for the whole dive, | |
| 1165 // Including ACCROSS all simulated ascent. | |
| 1166 low_depth = 0; | |
| 1167 | |
| 1168 // Reset gas switch history. | |
| 1169 backup_gas_used = sim_gas_last_used = 0; | |
| 1170 backup_gas_delay = sim_gas_delay = 0; | |
| 203 | 1171 sim_dive_mins = 0; |
| 1172 break; | |
| 186 | 1173 |
| 167 | 1174 case 0: //---- bottom time ----------------------------------------------- |
| 1175 calc_nullzeit(); | |
| 1176 check_ndl(); | |
| 186 | 1177 char_O_deco_status = 2; // calc ascent next time. |
| 1178 break; | |
| 1179 | |
| 1180 case 2: //---- Simulate ascent to first stop ----------------------------- | |
| 203 | 1181 // Check proposed gas at begin of ascent simulation |
| 1182 sim_dive_mins = int_I_divemins; // and time. | |
| 212 | 1183 temp_depth_limit = (int)(0.95 + (pres_respiration - pres_surface) / 0.09985) ; // Starts from current real depth. |
| 217 | 1184 best_gas_switch(); |
| 1185 set_gas(); | |
| 203 | 1186 |
| 1187 backup_gas_used = sim_gas_last_used;// And save for later simu steps. | |
| 1188 backup_gas_delay = sim_gas_delay; | |
| 186 | 1189 |
| 1190 sim_ascent_to_first_stop(); | |
| 201 | 1191 |
| 1192 char_O_deco_status = 1; // Calc stops next time (deco or gas switch). | |
| 167 | 1193 break; |
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1194 |
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1195 case 1: //---- Simulate stops -------------------------------------------- |
| 167 | 1196 calc_hauptroutine_calc_deco(); |
| 186 | 1197 |
| 1198 // If simulation is finished, restore the GF low reference, so that | |
| 1199 // next ascent simulation is done from the current depth: | |
| 217 | 1200 if( char_O_deco_status == 0 ) |
| 186 | 1201 { |
| 201 | 1202 sim_gas_last_used = backup_gas_used; |
| 203 | 1203 sim_gas_delay = backup_gas_delay; |
| 186 | 1204 } |
| 167 | 1205 break; |
| 116 | 1206 } |
| 167 | 1207 |
| 116 | 1208 check_post_dbg(); |
| 1209 } | |
| 1210 | |
| 167 | 1211 ////////////////////////////////////////////////////////////////////////////// |
| 1212 // calc_hauptroutine_data_input | |
| 1213 // | |
| 1214 // Reset all C-code dive parameters from their ASM-code values. | |
| 1215 // Detect gas change condition. | |
| 1216 // | |
| 116 | 1217 void calc_hauptroutine_data_input(void) |
| 1218 { | |
| 203 | 1219 overlay short int_temp; |
| 126 | 1220 |
| 197 | 1221 pres_respiration = int_I_pres_respiration * 0.001; |
| 1222 pres_surface = int_I_pres_surface * 0.001; | |
| 1223 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1224 He_ratio = char_I_He_ratio * 0.01; | |
| 1225 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
| 116 | 1226 |
| 126 | 1227 // ____________________________________________________ |
| 1228 // | |
| 1229 // _____________ G A S _ C H A N G E S ________________ | |
| 1230 // ____________________________________________________ | |
| 1231 | |
| 212 | 1232 // Keep a margin of 150mbar = 1.50m |
| 1233 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1234 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 126 | 1235 |
| 212 | 1236 deco_gas_change1 = 0; |
| 1237 deco_gas_change2 = 0; | |
| 1238 deco_gas_change3 = 0; | |
| 1239 deco_gas_change4 = 0; | |
| 1240 deco_gas_change5 = 0; | |
| 116 | 1241 |
| 203 | 1242 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
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1243 if(char_I_deco_gas_change[0]) |
| 126 | 1244 { |
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1245 if( int_temp > 100 *(short)char_I_deco_gas_change[0] ) |
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1246 deco_gas_change1 = char_I_deco_gas_change[0]; |
| 126 | 1247 } |
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1248 if(char_I_deco_gas_change[1]) |
| 126 | 1249 { |
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1250 if( int_temp > 100 *(short)char_I_deco_gas_change[1] ) |
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1251 deco_gas_change2 = char_I_deco_gas_change[1]; |
| 126 | 1252 } |
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1253 if(char_I_deco_gas_change[2]) |
| 126 | 1254 { |
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1255 if( int_temp > 100 *(short)char_I_deco_gas_change[2] ) |
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1256 deco_gas_change3 = char_I_deco_gas_change[2]; |
| 126 | 1257 } |
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1258 if(char_I_deco_gas_change[3]) |
| 126 | 1259 { |
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1260 if( int_temp > 100 *(short)char_I_deco_gas_change[3] ) |
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1261 deco_gas_change4 = char_I_deco_gas_change[3]; |
| 126 | 1262 } |
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1263 if(char_I_deco_gas_change[4]) |
| 126 | 1264 { |
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1265 if( int_temp > 100 *(short)char_I_deco_gas_change[4] ) |
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1266 deco_gas_change5 = char_I_deco_gas_change[4]; |
| 126 | 1267 } |
| 116 | 1268 |
| 197 | 1269 const_ppO2 = char_I_const_ppO2 * 0.01; |
| 1270 deco_ppO2_change = char_I_deco_ppO2_change / 99.95 | |
| 1271 + pres_surface | |
| 1272 + float_deco_distance; | |
| 1273 deco_ppO2 = char_I_deco_ppO2 * 0.01; | |
| 1274 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1275 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1276 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1277 GF_high = char_I_GF_High_percentage * 0.01; | |
| 126 | 1278 GF_delta = GF_high - GF_low; |
| 116 | 1279 } |
| 1280 | |
| 167 | 1281 ////////////////////////////////////////////////////////////////////////////// |
| 171 | 1282 // |
| 1283 // | |
| 116 | 1284 void calc_hauptroutine_update_tissues(void) |
| 1285 { | |
| 197 | 1286 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
| 1287 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
| 1288 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
| 1289 | |
| 1290 if (char_I_const_ppO2 == 0) // new in v.101 | |
| 167 | 1291 pres_diluent = pres_respiration; // new in v.101 |
| 186 | 1292 else |
| 1293 { | |
| 167 | 1294 pres_diluent = ((pres_respiration - const_ppO2)/(N2_ratio + He_ratio)); // new in v.101 |
| 186 | 1295 if (pres_diluent > pres_respiration) // new in v.101 |
| 1296 pres_diluent = pres_respiration; // new in v.101 | |
| 1297 } | |
| 200 | 1298 if (pres_diluent > ppWVapour) // new in v.101 |
| 116 | 1299 { |
| 200 | 1300 ppO2 = N2_ratio * (pres_diluent - ppWVapour); // changed in v.101 |
| 1301 ppHe = He_ratio * (pres_diluent - ppWVapour); // changed in v.101 | |
| 116 | 1302 char_O_diluent = (char)(pres_diluent/pres_respiration*100.0); |
| 1303 } | |
| 167 | 1304 else // new in v.101 |
| 116 | 1305 { |
| 200 | 1306 ppO2 = 0.0; // new in v.101 |
| 1307 ppHe = 0.0; // new in v.101 | |
| 116 | 1308 char_O_diluent = 0; |
| 1309 } | |
| 1310 | |
| 1311 if(!char_I_step_is_1min) | |
| 192 | 1312 calc_tissue(0); |
| 116 | 1313 else |
| 192 | 1314 calc_tissue(1); |
| 186 | 1315 |
| 192 | 1316 // Calc limit for surface, ie. GF_high. |
| 1317 calc_limit(GF_high); | |
| 186 | 1318 |
| 203 | 1319 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
| 1320 int_O_gtissue_press = (short)((pres_tissue[char_O_gtissue_no] + (pres_tissue+16)[char_O_gtissue_no]) * 1000); | |
| 192 | 1321 |
| 1322 // if guiding tissue can not be exposed to surface pressure immediately | |
| 1323 if( calc_lead_tissue_limit > pres_surface && char_O_deco_status == 0) | |
| 116 | 1324 { |
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1325 char_O_nullzeit = 0; // deco necessary |
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1326 char_O_deco_status = 2; // calculate ascent on next iteration. |
| 116 | 1327 } |
| 171 | 1328 } |
| 1329 | |
| 116 | 1330 |
| 167 | 1331 ////////////////////////////////////////////////////////////////////////////// |
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1332 // Compute stops. |
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1333 // |
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1334 // Note: because this can be very long, break on 16 iterations, and set state |
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1335 // to 0 when finished, or to 1 when needing to continue. |
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1336 // |
| 116 | 1337 void calc_hauptroutine_calc_deco(void) |
| 1338 { | |
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1339 overlay unsigned char loop; |
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1340 |
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1341 for(loop = 0; loop < 16; ++loop) |
| 116 | 1342 { |
| 212 | 1343 overlay float new_presure; |
| 1344 overlay unsigned char backup_gas_last_used; | |
| 1345 | |
| 197 | 1346 // Do not ascent while doing a gas switch. |
| 203 | 1347 if( sim_gas_delay <= sim_dive_mins ) |
| 1348 { | |
| 212 | 1349 backup_gas_last_used = sim_gas_last_used; |
| 197 | 1350 calc_nextdecodepth(); |
| 116 | 1351 |
| 203 | 1352 //---- Finish computations once surface is reached --------------- |
| 1353 if( temp_depth_limit == 0 ) | |
| 1354 { | |
| 1355 copy_deco_table(); | |
| 1356 calc_ascenttime(); | |
| 1357 char_O_deco_status = 0; // calc nullzeit next time. | |
| 1358 return; | |
| 1359 } | |
| 212 | 1360 } |
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1361 |
| 212 | 1362 //---- Can we ascent to that stop at once, or is it just ascenting ? |
| 1363 new_presure = temp_depth_limit * 0.09985 // Convert to relative bar, | |
| 1364 + pres_surface; // To absolute, | |
| 1365 | |
| 1366 if( (temp_deco - new_presure) > 1.0 ) // More than 10m/mn ? | |
| 1367 { | |
| 1368 temp_deco -= 1.0; // Just keep ascending. | |
| 1369 sim_gas_delay = 0; // Reset gas delay, | |
| 1370 sim_gas_last_used = backup_gas_last_used; // and usage history. | |
| 1371 } | |
| 1372 else | |
| 1373 { | |
| 1374 temp_deco = new_presure; | |
| 1375 update_deco_table(); // This is a one minute stops. | |
| 203 | 1376 } |
| 197 | 1377 |
| 203 | 1378 //---- Then update tissue and decoplan ------------------------------- |
| 1379 sim_dive_mins++; // Advance simulated time by 1 minute. | |
| 217 | 1380 set_gas(); // Apply any simulated gas change, once validated. |
| 212 | 1381 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
| 192 | 1382 sim_tissue(1); // Simulate compartiments for 1 minute. |
| 116 | 1383 } |
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1384 |
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1385 // Surface not reached, need more stops... |
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1386 char_O_deco_status = 1; // calc more stops next time. |
| 116 | 1387 } |
| 1388 | |
| 167 | 1389 ////////////////////////////////////////////////////////////////////////////// |
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1390 // Simulation ascention to first deco stop. |
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1391 // |
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1392 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1393 // there is no need to break on more that 16 iterations |
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1394 // (or we are already in deep shit). |
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1395 // |
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1396 void sim_ascent_to_first_stop(void) |
| 116 | 1397 { |
| 171 | 1398 update_startvalues(); |
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1399 clear_deco_table(); |
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1400 |
| 200 | 1401 temp_deco = pres_respiration; // Starts from current real depth. |
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1402 |
| 212 | 1403 // Do we have a gas switch going on ? |
| 1404 if( sim_gas_delay > sim_dive_mins ) | |
| 1405 return; | |
| 1406 | |
| 203 | 1407 // Loop until first stop, gas switch, or surface is reached. |
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1408 for(;;) |
| 116 | 1409 { |
| 203 | 1410 // No: try ascending 1 full minute. |
| 1411 temp_deco -= 1.0; // Ascent 1 min, at 10m/min. == 1bar/min. | |
| 1412 | |
| 212 | 1413 // Compute sim_lead_tissue_limit at GF_low (deepest stop). |
| 1414 sim_limit(GF_low); | |
| 1415 | |
| 1416 // Did we reach deepest remaining stop ? | |
| 1417 if( temp_deco <= sim_lead_tissue_limit ) | |
| 1418 { | |
| 1419 temp_deco += 1.0; // Restore last correct depth. | |
| 1420 break; // Return stop found ! | |
| 1421 } | |
| 1422 | |
| 203 | 1423 // Did we reach surface ? |
| 1424 if( temp_deco <= pres_surface ) | |
| 1425 { | |
| 1426 temp_deco = pres_surface; // Yes: finished ! | |
| 1427 break; | |
| 1428 } | |
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1429 |
| 212 | 1430 // Check gas change 5 meter below new depth. |
| 1431 temp_depth_limit = (temp_deco + 0.5 - pres_surface) / 0.09985; | |
| 217 | 1432 deepest_gas_switch(); |
| 212 | 1433 if( sim_gas_delay > sim_dive_mins ) |
| 1434 break; | |
| 171 | 1435 |
| 203 | 1436 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 212 | 1437 sim_alveolar_presures(); // Still uses temp_deco. |
| 203 | 1438 sim_tissue(1); // and update tissues for 1 min. |
| 1439 } | |
| 167 | 1440 } |
| 116 | 1441 |
| 167 | 1442 ////////////////////////////////////////////////////////////////////////////// |
| 1443 // calc_tissue | |
| 1444 // | |
| 116 | 1445 // optimized in v.101 |
| 167 | 1446 // |
| 184 | 1447 static void calc_tissue(PARAMETER unsigned char period) |
| 116 | 1448 { |
| 126 | 1449 for (ci=0;ci<16;ci++) |
| 1450 { | |
| 184 | 1451 read_buhlmann_coefficients(period); // 2 sec or 1 min period. |
| 116 | 1452 |
| 126 | 1453 // N2 |
| 200 | 1454 temp_tissue = (ppO2 - pres_tissue[ci]) * var_N2_e; |
| 126 | 1455 temp_tissue_safety(); |
| 167 | 1456 pres_tissue[ci] += temp_tissue; |
| 165 | 1457 |
| 126 | 1458 // He |
| 200 | 1459 temp_tissue = (ppHe - (pres_tissue+16)[ci]) * var_He_e; |
| 126 | 1460 temp_tissue_safety(); |
| 167 | 1461 (pres_tissue+16)[ci] += temp_tissue; |
| 192 | 1462 } |
| 167 | 1463 } |
| 116 | 1464 |
| 167 | 1465 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1466 // calc_limit |
| 167 | 1467 // |
| 192 | 1468 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
| 167 | 1469 // |
| 192 | 1470 static void calc_limit(PARAMETER float GF_current) |
| 167 | 1471 { |
| 192 | 1472 char_O_gtissue_no = 255; |
| 1473 calc_lead_tissue_limit = 0.0; | |
| 1474 | |
| 1475 for (ci=0;ci<16;ci++) | |
| 1476 { | |
| 1477 overlay float p = pres_tissue[ci] + (pres_tissue+16)[ci]; | |
| 1478 | |
| 1479 read_buhlmann_coefficients(-1); // 2 sec or 1 min period. | |
| 1480 var_N2_a = (var_N2_a * pres_tissue[ci] + var_He_a * (pres_tissue+16)[ci]) / p; | |
| 1481 var_N2_b = (var_N2_b * pres_tissue[ci] + var_He_b * (pres_tissue+16)[ci]) / p; | |
| 116 | 1482 |
| 192 | 1483 // Apply the Eric Baker's varying gradient factor correction. |
| 1484 // Note: the correction factor depends both on GF and b, | |
| 1485 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1486 // so that can change who is the leading gas... | |
| 1487 // Note: Also depends of the GF. So the calcul is different for | |
| 1488 // GF_low, current GF, or GF_high... | |
| 1489 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1490 // hence what would happend at surface, | |
| 1491 // hence at GF_high. | |
| 1492 if( char_I_deco_model == 1 ) | |
| 1493 p = ( p - var_N2_a * GF_current) * var_N2_b | |
| 1494 / (GF_current + var_N2_b * (1.0 - GF_current)); | |
| 1495 else | |
| 1496 p = (p - var_N2_a) * var_N2_b; | |
| 1497 if( p < 0 ) p = 0; | |
| 1498 | |
| 1499 pres_tissue_limit[ci] = p; | |
| 1500 if( p > calc_lead_tissue_limit ) | |
| 1501 { | |
| 1502 char_O_gtissue_no = ci; | |
| 1503 calc_lead_tissue_limit = p; | |
| 1504 } | |
| 1505 } | |
| 197 | 1506 |
| 1507 assert( char_O_gtissue_no < 16 ); | |
| 1508 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); | |
| 167 | 1509 } |
| 1510 | |
| 1511 ////////////////////////////////////////////////////////////////////////////// | |
| 1512 // calc_nullzeit | |
| 1513 // | |
| 1514 // calculates the remaining bottom time | |
| 1515 // | |
| 1516 // unchanged in v.101 | |
| 1517 // | |
| 1518 static void calc_nullzeit(void) | |
| 1519 { | |
| 203 | 1520 overlay unsigned char loop; |
| 200 | 1521 update_startvalues(); |
| 167 | 1522 |
| 116 | 1523 char_O_nullzeit = 0; |
| 167 | 1524 for(loop = 1; loop <= 17; loop++) |
| 116 | 1525 { |
| 1526 backup_sim_pres_tissue(); | |
| 197 | 1527 sim_tissue(2); // 10 min. |
| 192 | 1528 sim_limit(GF_high); |
| 167 | 1529 |
| 192 | 1530 if( sim_lead_tissue_limit > pres_surface ) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately |
| 185 | 1531 { |
| 1532 restore_sim_pres_tissue(); | |
| 1533 break; | |
| 1534 } | |
| 1535 // Validate once we know its good. | |
| 1536 char_O_nullzeit += 10; | |
| 167 | 1537 } |
| 1538 | |
| 116 | 1539 if (char_O_nullzeit < 60) |
| 1540 { | |
| 167 | 1541 for(loop=1; loop <= 10; loop++) |
| 116 | 1542 { |
| 197 | 1543 sim_tissue(1); // 1 min |
| 192 | 1544 sim_limit(GF_high); |
| 1545 | |
| 1546 if( sim_lead_tissue_limit > pres_surface) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately | |
| 185 | 1547 break; |
| 1548 char_O_nullzeit++; | |
| 167 | 1549 } |
| 185 | 1550 } |
| 1551 } | |
| 116 | 1552 |
| 167 | 1553 ////////////////////////////////////////////////////////////////////////////// |
| 1554 // backup_sim_pres_tissue | |
| 1555 // | |
| 116 | 1556 void backup_sim_pres_tissue(void) |
| 1557 { | |
| 167 | 1558 overlay unsigned char x; |
| 1559 | |
| 1560 for(x = 0; x<32; x++) | |
| 126 | 1561 sim_pres_tissue_backup[x] = sim_pres_tissue[x]; |
| 167 | 1562 } |
| 116 | 1563 |
| 167 | 1564 ////////////////////////////////////////////////////////////////////////////// |
| 1565 // restore_sim_pres_tissue | |
| 1566 // | |
| 116 | 1567 void restore_sim_pres_tissue(void) |
| 1568 { | |
| 167 | 1569 overlay unsigned char x; |
| 1570 | |
| 1571 for(x = 0; x<32; x++) | |
| 126 | 1572 sim_pres_tissue[x] = sim_pres_tissue_backup[x]; |
| 167 | 1573 } |
| 116 | 1574 |
| 167 | 1575 ////////////////////////////////////////////////////////////////////////////// |
| 1576 // calc_ascenttime | |
| 1577 // | |
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1578 static void calc_ascenttime(void) |
| 116 | 1579 { |
| 126 | 1580 if (pres_respiration > pres_surface) |
| 1581 { | |
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1582 overlay unsigned char x; |
| 168 | 1583 |
| 192 | 1584 // + 0.7 to count 1 minute ascent time from 3 meter to surface |
| 1585 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
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1586 if (ascent < 0.0) |
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1587 ascent = 0.0; |
| 203 | 1588 int_O_ascenttime = (unsigned short)(ascent + 0.99); |
| 168 | 1589 |
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1590 for(x=0; x<32 && internal_deco_depth[x]; x++) |
| 203 | 1591 int_O_ascenttime += (unsigned short)internal_deco_time[x]; |
| 126 | 1592 } |
| 1593 else | |
| 168 | 1594 int_O_ascenttime = 0; |
| 167 | 1595 } |
| 116 | 1596 |
| 167 | 1597 ////////////////////////////////////////////////////////////////////////////// |
| 1598 // update_startvalues | |
| 1599 // | |
| 116 | 1600 // updated in v.102 |
| 167 | 1601 // |
| 116 | 1602 void update_startvalues(void) |
| 1603 { | |
| 167 | 1604 overlay unsigned char x; |
| 116 | 1605 |
| 201 | 1606 // Start ascent simulation with current tissue partial pressures. |
| 116 | 1607 for (x = 0;x<16;x++) |
| 1608 { | |
| 1609 sim_pres_tissue[x] = pres_tissue[x]; | |
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1610 (sim_pres_tissue+16)[x] = (pres_tissue+16)[x]; |
| 116 | 1611 sim_pres_tissue_limit[x] = pres_tissue_limit[x]; |
| 1612 } | |
| 197 | 1613 |
| 201 | 1614 // No leading tissue (yet) for this ascent simulation. |
| 197 | 1615 sim_lead_tissue_limit = 0.0; |
| 1616 sim_lead_tissue_no = 255; | |
| 167 | 1617 } |
| 116 | 1618 |
| 167 | 1619 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1620 // sim_tissue |
| 167 | 1621 // |
| 116 | 1622 // optimized in v.101 |
| 167 | 1623 // |
| 1624 // Function very simular to calc_tissue, but: | |
| 1625 // + Use a 1min or 10min period. | |
| 1626 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 184 | 1627 static void sim_tissue(PARAMETER unsigned char period) |
| 116 | 1628 { |
| 192 | 1629 for(ci=0; ci<16; ci++) |
| 126 | 1630 { |
| 184 | 1631 read_buhlmann_coefficients(period); // 1 or 10 minute(s) interval |
| 165 | 1632 |
| 126 | 1633 // N2 |
| 200 | 1634 temp_tissue = (ppO2 - sim_pres_tissue[ci]) * var_N2_e; |
| 126 | 1635 temp_tissue_safety(); |
| 167 | 1636 sim_pres_tissue[ci] += temp_tissue; |
| 126 | 1637 |
| 1638 // He | |
| 200 | 1639 temp_tissue = (ppHe - (sim_pres_tissue+16)[ci]) * var_He_e; |
| 126 | 1640 temp_tissue_safety(); |
| 167 | 1641 (sim_pres_tissue+16)[ci] += temp_tissue; |
| 192 | 1642 } |
| 167 | 1643 } |
| 116 | 1644 |
| 167 | 1645 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1646 // sim_limit() |
| 1647 // | |
| 1648 // New in v.111 | |
| 1649 // | |
| 1650 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1651 // different depth, because it depends on current gradient factor. | |
| 167 | 1652 // |
| 192 | 1653 static void sim_limit(PARAMETER float GF_current) |
| 116 | 1654 { |
| 212 | 1655 assert( 0.0 < GF_current && GF_current <= 1.0f); |
| 1656 | |
| 192 | 1657 sim_lead_tissue_limit = 0.0; |
| 212 | 1658 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
| 192 | 1659 |
| 1660 for(ci=0; ci<16; ci++) | |
| 1661 { | |
| 1662 overlay float p = sim_pres_tissue[ci] + (sim_pres_tissue+16)[ci]; | |
| 1663 | |
| 1664 read_buhlmann_coefficients(-1); | |
| 1665 var_N2_a = (var_N2_a * sim_pres_tissue[ci] + var_He_a * (sim_pres_tissue+16)[ci]) / p; | |
| 1666 var_N2_b = (var_N2_b * sim_pres_tissue[ci] + var_He_b * (sim_pres_tissue+16)[ci]) / p; | |
| 1667 | |
| 1668 // Apply the Eric Baker's varying gradient factor correction. | |
| 1669 // Note: the correction factor depends both on GF and b, | |
| 1670 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1671 // so that can change who is the leading gas... | |
| 1672 // Note: Also depends of the GF_current... | |
| 1673 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1674 // hence what would happend at surface, | |
| 1675 // hence at GF_high. | |
| 1676 if( char_I_deco_model == 1 ) | |
| 1677 p = ( p - var_N2_a * GF_current) * var_N2_b | |
| 1678 / (GF_current + var_N2_b * (1.0 - GF_current)); | |
| 1679 else | |
| 1680 p = (p - var_N2_a) * var_N2_b; | |
| 1681 if( p < 0 ) p = 0; | |
| 1682 | |
| 1683 sim_pres_tissue_limit[ci] = p; | |
| 1684 if( p > sim_lead_tissue_limit ) | |
| 1685 { | |
| 1686 sim_lead_tissue_no = ci; | |
| 1687 sim_lead_tissue_limit = p; | |
| 1688 } | |
| 1689 } // for ci | |
| 197 | 1690 |
| 1691 assert( sim_lead_tissue_no < 16 ); | |
| 1692 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0); | |
| 167 | 1693 } |
| 116 | 1694 |
| 167 | 1695 ////////////////////////////////////////////////////////////////////////////// |
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1696 // clear_deco_table |
| 167 | 1697 // |
| 1698 // unchanged in v.101 | |
| 1699 // | |
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1700 static void clear_deco_table(void) |
| 116 | 1701 { |
|
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1702 overlay unsigned char x; |
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1703 |
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1704 for(x=0; x<32; ++x) |
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1705 { |
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1706 internal_deco_time [x] = 0; |
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1707 internal_deco_depth[x] = 0; |
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1708 } |
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1709 } |
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1710 |
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1711 ////////////////////////////////////////////////////////////////////////////// |
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1712 // update_deco_table |
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1713 // |
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1714 // Add 1 min to current stop. |
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1715 // |
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1716 // Inputs: |
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1717 // temp_depth_limit = stop's depth, in meters. |
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1718 // In/Out: |
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1719 // internal_deco_depth[] : depth (in meters) of each stops. |
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1720 // internal_deco_time [] : time (in minutes) of each stops. |
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1721 // |
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1722 static void update_deco_table() |
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1723 { |
| 192 | 1724 overlay unsigned char x; |
| 200 | 1725 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1726 |
| 192 | 1727 for(x=0; x<32; ++x) |
| 1728 { | |
| 212 | 1729 // Make sure deco-stops are recorded in order: |
| 1730 assert( !internal_deco_depth[x] || temp_depth_limit <= internal_deco_depth[x] ); | |
| 1731 | |
| 200 | 1732 if( internal_deco_depth[x] == temp_depth_limit ) |
| 192 | 1733 { |
| 1734 // Do not overflow (max 255') | |
| 1735 if( internal_deco_time[x] < 255 ) | |
| 1736 { | |
| 1737 internal_deco_time[x]++; | |
| 1738 return; | |
| 1739 } | |
| 1740 // But store extra in the next stop... | |
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1741 } |
| 192 | 1742 |
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1743 if( internal_deco_depth[x] == 0 ) |
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1744 { |
| 192 | 1745 internal_deco_depth[x] = temp_depth_limit; |
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1746 internal_deco_time[x] = 1; |
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1747 return; |
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1748 } |
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1749 } |
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1750 |
| 192 | 1751 // Can't store stops at more than 96m. |
| 1752 // Or stops at less that 3m too. | |
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1753 // Just do nothing with that... |
| 167 | 1754 } |
| 116 | 1755 |
| 167 | 1756 ////////////////////////////////////////////////////////////////////////////// |
| 1757 // calc_gradient_factor | |
| 1758 // | |
| 165 | 1759 // optimized in v.101 (var_N2_a) |
| 116 | 1760 // new code in v.102 |
| 167 | 1761 // |
| 1762 static void calc_gradient_factor(void) | |
| 116 | 1763 { |
| 197 | 1764 overlay float gf; |
| 1765 assert( char_O_gtissue_no < 16 ); | |
| 1766 | |
| 116 | 1767 // tissue > respiration (entsaettigungsvorgang) |
| 1768 // gradient ist wieviel prozent an limit mit basis tissue | |
| 1769 // dh. 0% = respiration == tissue | |
| 1770 // dh. 100% = respiration == limit | |
| 197 | 1771 temp_tissue = pres_tissue[char_O_gtissue_no] + (pres_tissue+16)[char_O_gtissue_no]; |
| 1772 if( temp_tissue < pres_respiration ) | |
| 1773 gf = 0.0; | |
| 1774 else | |
| 1775 { | |
| 1776 gf = (temp_tissue - pres_respiration) | |
| 1777 / (temp_tissue - pres_tissue_limit[char_O_gtissue_no]) | |
| 1778 * 100.0; | |
| 1779 if( gf > 255.0 ) gf = 255.0; | |
| 1780 if( gf < 0.0 ) gf = 0.0; | |
| 1781 } | |
| 1782 char_O_gradient_factor = (unsigned char)gf; | |
| 116 | 1783 |
| 1784 if (char_I_deco_model == 1) // calculate relative gradient factor | |
| 1785 { | |
| 197 | 1786 overlay float rgf; |
| 1787 | |
| 1788 if( low_depth == 0 ) | |
| 1789 rgf = GF_high; | |
| 1790 else | |
| 1791 { | |
| 1792 overlay float temp1 = low_depth * 0.09995; | |
| 1793 overlay float temp2 = pres_respiration - pres_surface; | |
| 186 | 1794 |
| 197 | 1795 if (temp2 <= 0) |
| 1796 rgf = GF_high; | |
| 1797 else if (temp2 >= temp1) | |
| 1798 rgf = GF_low; | |
| 1799 else | |
| 1800 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 1801 } | |
| 186 | 1802 |
| 197 | 1803 rgf = gf / rgf; // gf is already in percent |
| 1804 if( rgf < 0.0 ) rgf = 0.0; | |
| 1805 if( rgf > 255.0 ) rgf = 255.0; | |
| 1806 char_O_relative_gradient_GF = (unsigned char)rgf; | |
| 116 | 1807 } // calc relative gradient factor |
| 1808 else | |
| 1809 { | |
| 186 | 1810 char_O_relative_gradient_GF = char_O_gradient_factor; |
| 116 | 1811 } |
| 167 | 1812 } |
| 116 | 1813 |
| 167 | 1814 ////////////////////////////////////////////////////////////////////////////// |
| 1815 // deco_calc_desaturation_time | |
| 1816 // | |
| 116 | 1817 // FIXED N2_ratio |
| 1818 // unchanged in v.101 | |
| 167 | 1819 // |
| 116 | 1820 void deco_calc_desaturation_time(void) |
| 1821 { | |
| 203 | 1822 overlay unsigned short desat_time; // For a particular compartiment, in min. |
| 200 | 1823 overlay float temp1; |
| 197 | 1824 overlay float temp2; |
| 1825 overlay float temp3; | |
| 1826 overlay float temp4; | |
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1827 RESET_C_STACK |
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1828 |
| 126 | 1829 N2_ratio = 0.7902; // FIXED sum as stated in b"uhlmann |
| 1830 pres_surface = (float)int_I_pres_surface / 1000.0; | |
| 200 | 1831 ppO2 = N2_ratio * (pres_surface - ppWVapour); |
| 126 | 1832 int_O_desaturation_time = 0; |
| 1833 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) | |
| 1834 | |
| 1835 for (ci=0;ci<16;ci++) | |
| 1836 { | |
| 200 | 1837 overlay float var_N2_halftime = buhlmann_ht[ci]; |
| 1838 overlay float var_He_halftime = (buhlmann_ht+16)[ci]; | |
| 116 | 1839 |
| 126 | 1840 // saturation_time (for flight) and N2_saturation in multiples of halftime |
| 1841 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1842 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1843 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and noFly calculations | |
| 1844 // N2 | |
| 200 | 1845 temp1 = 1.05 * ppO2; |
| 126 | 1846 temp1 = temp1 - pres_tissue[ci]; |
| 200 | 1847 temp2 = ppO2 - pres_tissue[ci]; |
| 126 | 1848 if (temp2 >= 0.0) |
| 1849 { | |
| 1850 temp1 = 0; | |
| 1851 temp2 = 0; | |
| 1852 } | |
| 1853 else | |
| 1854 temp1 = temp1 / temp2; | |
| 1855 if (temp1 > 0.0) | |
| 1856 { | |
| 1857 temp1 = log(1.0 - temp1); | |
| 1858 temp1 = temp1 / -0.6931; // temp1 is the multiples of half times necessary. | |
| 1859 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1860 // minus because log is negative | |
| 165 | 1861 temp2 = var_N2_halftime * temp1 / float_desaturation_multiplier; // time necessary (in minutes ) for complete desaturation (see comment about 10 percent) , new in v.101: float_desaturation_multiplier |
| 126 | 1862 } |
| 1863 else | |
| 1864 { | |
| 1865 temp1 = 0; | |
| 1866 temp2 = 0; | |
| 1867 } | |
| 116 | 1868 |
| 126 | 1869 // He |
| 167 | 1870 temp3 = 0.1 - (pres_tissue+16)[ci]; |
| 126 | 1871 if (temp3 >= 0.0) |
| 1872 { | |
| 1873 temp3 = 0; | |
| 1874 temp4 = 0; | |
| 1875 } | |
| 1876 else | |
| 167 | 1877 temp3 = -1.0 * temp3 / (pres_tissue+16)[ci]; |
| 126 | 1878 if (temp3 > 0.0) |
| 1879 { | |
| 1880 temp3 = log(1.0 - temp3); | |
| 1881 temp3 = temp3 / -0.6931; // temp1 is the multiples of half times necessary. | |
| 1882 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1883 // minus because log is negative | |
| 165 | 1884 temp4 = var_He_halftime * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
| 126 | 1885 } |
| 1886 else | |
| 1887 { | |
| 1888 temp3 = 0; | |
| 1889 temp4 = 0; | |
| 1890 } | |
| 116 | 1891 |
| 126 | 1892 // saturation_time (for flight) |
| 1893 if (temp4 > temp2) | |
| 203 | 1894 desat_time = (unsigned short)temp4; |
| 126 | 1895 else |
| 203 | 1896 desat_time = (unsigned short)temp2; |
| 167 | 1897 if(desat_time > int_O_desaturation_time) |
| 1898 int_O_desaturation_time = desat_time; | |
| 116 | 1899 |
| 126 | 1900 // N2 saturation in multiples of halftime for display purposes |
| 1901 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1902 temp2 = temp2 + 80.0; // set center | |
| 1903 if (temp2 < 0.0) | |
| 1904 temp2 = 0.0; | |
| 1905 if (temp2 > 255.0) | |
| 1906 temp2 = 255.0; | |
| 1907 char_O_tissue_saturation[ci] = (char)temp2; | |
| 1908 // He saturation in multiples of halftime for display purposes | |
| 1909 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1910 temp4 = temp4 + 80.0; // set center | |
| 1911 if (temp4 < 0.0) | |
| 1912 temp4 = 0.0; | |
| 1913 if (temp4 > 255.0) | |
| 1914 temp4 = 255.0; | |
| 167 | 1915 (char_O_tissue_saturation+16)[ci] = (char)temp4; |
| 126 | 1916 } // for |
| 167 | 1917 } |
| 116 | 1918 |
| 167 | 1919 ////////////////////////////////////////////////////////////////////////////// |
| 1920 // calc_wo_deco_step_1_min | |
| 1921 // | |
| 116 | 1922 // FIXED N2 Ratio |
| 1923 // optimized in v.101 (...saturation_multiplier) | |
| 1924 // desaturation slowed down to 70,42% | |
| 167 | 1925 // |
| 1926 static void calc_wo_deco_step_1_min(void) | |
| 116 | 1927 { |
| 1928 if(flag_in_divemode) | |
| 1929 { | |
| 1930 flag_in_divemode = 0; | |
| 1931 set_dbg_end_of_dive(); | |
| 1932 } | |
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1933 |
| 126 | 1934 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
| 212 | 1935 pres_respiration = int_I_pres_respiration * 0.001; // assembler code uses different digit system |
| 1936 pres_surface = int_I_pres_surface * 0.001; // the b"uhlmann formula using pres_surface does not use the N2_ratio | |
| 200 | 1937 ppO2 = N2_ratio * (pres_respiration - ppWVapour); // ppWVapour is the extra pressure in the body |
| 1938 ppHe = 0.0; | |
| 126 | 1939 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) |
| 197 | 1940 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 126 | 1941 |
| 192 | 1942 calc_tissue(1); // update the pressure in the 32 tissues in accordance with the new ambient pressure |
| 167 | 1943 |
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1944 clear_deco_table(); |
| 200 | 1945 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
| 126 | 1946 char_O_nullzeit = 0; |
| 168 | 1947 int_O_ascenttime = 0; |
| 126 | 1948 calc_gradient_factor(); |
| 167 | 1949 } |
| 126 | 1950 |
| 167 | 1951 ////////////////////////////////////////////////////////////////////////////// |
| 1952 ////////////////////////////////////////////////////////////////////////////// | |
| 1953 ////////////////////////////////// deco_hash ///////////////////////////////// | |
| 1954 ////////////////////////////////////////////////////////////////////////////// | |
| 1955 ////////////////////////////////////////////////////////////////////////////// | |
| 126 | 1956 |
| 184 | 1957 #ifndef CROSS_COMPILE |
| 116 | 1958 void deco_hash(void) |
| 1959 { | |
| 167 | 1960 overlay unsigned char md_i, md_j; // Loop index. |
| 1961 overlay unsigned char md_t; | |
| 1962 overlay unsigned char md_buffer[16]; | |
| 1963 overlay unsigned char md_temp; | |
| 203 | 1964 overlay unsigned short md_pointer; |
| 167 | 1965 |
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1966 RESET_C_STACK |
| 126 | 1967 |
| 1968 // init | |
| 164 | 1969 for(md_i=0;md_i<16;md_i++) |
| 126 | 1970 { |
| 1971 md_state[md_i] = 0; | |
| 164 | 1972 char_O_hash[md_i] = 0; |
| 126 | 1973 } // for md_i 16 |
| 116 | 1974 |
| 126 | 1975 _asm |
| 167 | 1976 movlw 0x01 // md_pi address. |
| 1977 movwf TBLPTRU,0 | |
| 1978 movlw 0x7E | |
| 1979 movwf TBLPTRH,0 | |
| 1980 movlw 0x00 | |
| 1981 movwf TBLPTRL,0 | |
| 126 | 1982 _endasm; |
| 165 | 1983 md_i = 0; |
| 1984 do { | |
| 126 | 1985 _asm |
| 1986 TBLRDPOSTINC | |
| 1987 movff TABLAT,md_temp | |
| 1988 _endasm | |
| 165 | 1989 md_pi_subst[md_i++] = md_temp; |
| 1990 } while( md_i != 0 ); | |
| 1991 | |
| 126 | 1992 _asm |
| 167 | 1993 movlw 0x00 |
| 1994 movwf TBLPTRU,0 | |
| 1995 movlw 0x00 | |
| 1996 movwf TBLPTRH,0 | |
| 1997 movlw 0x00 | |
| 1998 movwf TBLPTRL,0 | |
| 126 | 1999 _endasm |
| 167 | 2000 |
| 126 | 2001 // cycle buffers |
| 2002 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
| 2003 { | |
| 2004 md_t = 0; | |
| 2005 for (md_i=0;md_i<16;md_i++) | |
| 2006 { | |
| 2007 if(md_pointer == 9) | |
| 164 | 2008 md_temp = char_O_hash[md_i]; |
| 126 | 2009 else |
| 2010 { | |
| 2011 _asm | |
| 167 | 2012 TBLRDPOSTINC |
| 2013 movff TABLAT,md_temp | |
| 126 | 2014 _endasm |
| 2015 } // else | |
| 167 | 2016 |
| 2017 md_buffer[md_i] = md_temp; | |
| 186 | 2018 md_state[md_i+16] = md_temp; |
| 2019 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
| 126 | 2020 } // for md_i 16 |
| 2021 | |
| 2022 for (md_i=0;md_i<18;md_i++) | |
| 2023 { | |
| 2024 for (md_j=0;md_j<48;md_j++) | |
| 2025 { | |
| 167 | 2026 md_state[md_j] ^= md_pi_subst[md_t]; |
| 126 | 2027 md_t = md_state[md_j]; |
| 2028 } // for md_j 48 | |
| 2029 md_t = (unsigned char)(md_t+1); | |
| 2030 } // for md_i 18 | |
| 164 | 2031 md_t = char_O_hash[15]; |
| 126 | 2032 |
| 2033 for (md_i=0;md_i<16;md_i++) | |
| 2034 { | |
| 167 | 2035 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
| 164 | 2036 md_t = char_O_hash[md_i]; |
| 126 | 2037 } // for md_i 16 |
| 2038 } // for md_pointer | |
| 116 | 2039 } // void deco_hash(void) |
| 184 | 2040 #endif |
| 116 | 2041 |
| 167 | 2042 ////////////////////////////////////////////////////////////////////////////// |
| 2043 // deco_clear_CNS_fraction | |
| 2044 // | |
| 116 | 2045 // new in v.101 |
| 167 | 2046 // |
| 116 | 2047 void deco_clear_CNS_fraction(void) |
| 2048 { | |
|
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2049 RESET_C_STACK |
| 126 | 2050 CNS_fraction = 0.0; |
| 2051 char_O_CNS_fraction = 0; | |
| 167 | 2052 } |
| 116 | 2053 |
| 167 | 2054 ////////////////////////////////////////////////////////////////////////////// |
| 2055 // deco_calc_CNS_fraction | |
| 2056 // | |
| 116 | 2057 // new in v.101 |
| 2058 // optimized in v.102 : with new variables char_I_actual_ppO2 and actual_ppO2 | |
| 167 | 2059 // |
| 116 | 2060 // Input: char_I_actual_ppO2 |
| 2061 // Output: char_O_CNS_fraction | |
| 2062 // Uses and Updates: CNS_fraction | |
| 2063 // Uses: acutal_ppO2 | |
| 167 | 2064 // |
| 116 | 2065 void deco_calc_CNS_fraction(void) |
| 2066 { | |
| 167 | 2067 overlay float actual_ppO2; |
| 126 | 2068 RESET_C_STACK |
| 167 | 2069 |
| 126 | 2070 actual_ppO2 = (float)char_I_actual_ppO2 / 100.0; |
| 116 | 2071 |
| 126 | 2072 if (char_I_actual_ppO2 < 50) |
| 2073 CNS_fraction = CNS_fraction;// no changes | |
| 2074 else if (char_I_actual_ppO2 < 60) | |
| 2075 CNS_fraction = 1/(-54000.0 * actual_ppO2 + 54000.0) + CNS_fraction; | |
| 2076 else if (char_I_actual_ppO2 < 70) | |
| 2077 CNS_fraction = 1/(-45000.0 * actual_ppO2 + 48600.0) + CNS_fraction; | |
| 2078 else if (char_I_actual_ppO2 < 80) | |
| 2079 CNS_fraction = 1/(-36000.0 * actual_ppO2 + 42300.0) + CNS_fraction; | |
| 2080 else if (char_I_actual_ppO2 < 90) | |
| 2081 CNS_fraction = 1/(-27000.0 * actual_ppO2 + 35100.0) + CNS_fraction; | |
| 2082 else if (char_I_actual_ppO2 < 110) | |
| 2083 CNS_fraction = 1/(-18000.0 * actual_ppO2 + 27000.0) + CNS_fraction; | |
| 2084 else if (char_I_actual_ppO2 < 150) | |
| 2085 CNS_fraction = 1/(-9000.0 * actual_ppO2 + 17100.0) + CNS_fraction; | |
| 2086 else if (char_I_actual_ppO2 < 160) | |
| 2087 CNS_fraction = 1/(-22500.0 * actual_ppO2 + 37350.0) + CNS_fraction; | |
| 2088 else if (char_I_actual_ppO2 < 165) | |
| 2089 CNS_fraction = 0.000755 + CNS_fraction; // Arieli et all.(2002): Modeling pulmonary and CNS O2 toxicity... Formula (A1) based on value for 1.55 and c=20 | |
| 2090 else if (char_I_actual_ppO2 < 170) | |
| 2091 CNS_fraction = 0.00102 + CNS_fraction; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 | |
| 2092 else if (char_I_actual_ppO2 < 175) | |
| 2093 CNS_fraction = 0.00136 + CNS_fraction; | |
| 2094 else if (char_I_actual_ppO2 < 180) | |
| 2095 CNS_fraction = 0.00180 + CNS_fraction; | |
| 2096 else if (char_I_actual_ppO2 < 185) | |
| 2097 CNS_fraction = 0.00237 + CNS_fraction; | |
| 2098 else if (char_I_actual_ppO2 < 190) | |
| 2099 CNS_fraction = 0.00310 + CNS_fraction; | |
| 2100 else if (char_I_actual_ppO2 < 195) | |
| 2101 CNS_fraction = 0.00401 + CNS_fraction; | |
| 2102 else if (char_I_actual_ppO2 < 200) | |
| 2103 CNS_fraction = 0.00517 + CNS_fraction; | |
| 2104 else if (char_I_actual_ppO2 < 230) | |
| 2105 CNS_fraction = 0.0209 + CNS_fraction; | |
| 2106 else | |
| 2107 CNS_fraction = 0.0482 + CNS_fraction; // value for 2.5 | |
| 116 | 2108 |
| 126 | 2109 if (CNS_fraction > 2.5) |
| 2110 CNS_fraction = 2.5; | |
| 2111 if (CNS_fraction < 0.0) | |
| 2112 CNS_fraction = 0.0; | |
| 2113 | |
| 2114 char_O_CNS_fraction = (char)((CNS_fraction + 0.005)* 100.0); | |
| 167 | 2115 } |
| 116 | 2116 |
| 167 | 2117 ////////////////////////////////////////////////////////////////////////////// |
| 2118 // deco_calc_CNS_decrease_15min | |
| 2119 // | |
| 116 | 2120 // new in v.101 |
| 167 | 2121 // |
| 116 | 2122 // calculates the half time of 90 minutes in 6 steps of 15 min |
| 200 | 2123 // (Used in sleepmode, for low battery mode). |
| 167 | 2124 // |
| 116 | 2125 // Output: char_O_CNS_fraction |
| 2126 // Uses and Updates: CNS_fraction | |
| 167 | 2127 // |
| 116 | 2128 void deco_calc_CNS_decrease_15min(void) |
| 2129 { | |
|
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2130 RESET_C_STACK |
| 126 | 2131 CNS_fraction = 0.890899 * CNS_fraction; |
| 167 | 2132 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); |
| 2133 } | |
| 116 | 2134 |
| 167 | 2135 ////////////////////////////////////////////////////////////////////////////// |
| 2136 // deco_calc_percentage | |
| 2137 // | |
| 116 | 2138 // new in v.101 |
| 167 | 2139 // |
| 116 | 2140 // calculates int_I_temp * char_I_temp / 100 |
| 2141 // output is int_I_temp | |
| 200 | 2142 // |
| 2143 // Used to compute NoFly remaining time. | |
|
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2144 // |
| 116 | 2145 void deco_calc_percentage(void) |
| 2146 { | |
|
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2147 RESET_C_STACK |
|
222
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2148 |
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2149 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
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2150 } |
|
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2151 |
|
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2152 |
|
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2153 ////////////////////////////////////////////////////////////////////////////// |
|
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2154 // deco_gas_volumes |
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2155 // |
|
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2156 // new in v.111 |
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2157 // |
|
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2158 // calculates volumes for each gas. |
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2159 // |
|
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2160 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
|
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2161 /// Gas list. First gas is the bottom gas. |
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2162 // decoplan (char_O_deco_depth, char_O_deco_time). |
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2163 // CF#56 == bottom deci-liters/minutes (0.5 .. 50.0) |
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2164 // CF#57 == deco deci-liters/minutes (0.5 .. 50.0). |
| 224 | 2165 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
|
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2166 // |
|
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2167 void deco_gas_volumes(void) |
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2168 { |
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2169 overlay float volumes[5]; |
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2170 overlay float ascent_usage; |
| 224 | 2171 overlay unsigned char i; |
|
222
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2172 RESET_C_STACK |
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2173 |
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2174 //---- initialize with bottom consumption -------------------------------- |
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2175 volumes[0] = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. |
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2176 * char_I_bottom_time // in minutes. |
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2177 * read_custom_function(56) // In deci-liter/minutes. |
|
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2178 * 0.1; // deci-liters --> liters. |
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2179 |
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2180 for(i=1; i<5; ++i) // Nothing yet... |
|
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2181 volumes[i] = 0.0; |
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2182 |
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2183 //---- Ascent usage ------------------------------------------------------ |
|
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2184 |
| 224 | 2185 ascent_usage = read_custom_function(57) * 0.1; // In litter/minutes. |
|
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2186 |
| 224 | 2187 // Usage up to the first stop: |
| 2188 // - computed at MAX depth (easier, safer), | |
|
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2189 // - with an ascent speed of 10m/min. |
| 224 | 2190 // - with ascent litter / minutes. |
|
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2191 // - still using bottom gas: |
| 224 | 2192 volumes[0] += (char_I_bottom_depth* 0.1 + 1.0) |
|
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2193 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 |
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2194 * ascent_usage; |
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2195 |
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2196 for(i=0; i<32 && char_O_deco_depth[i] > 0; ++i) |
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2197 { |
| 224 | 2198 overlay unsigned char j, gas; |
|
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2199 // Gas switch depth ? |
| 224 | 2200 for(gas=j=0; j<4; ++j) |
|
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2201 { |
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2202 if( char_O_deco_depth[i] <= char_I_deco_gas_change[j] ) |
| 224 | 2203 if( (gas == 0) || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
| 2204 gas = j; | |
|
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2205 } |
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2206 |
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2207 // usage during stop: |
| 224 | 2208 // Note: because first gas is not in there, increment gas+1 |
| 2209 volumes[gas+1] += (char_O_deco_depth[i]*0.1 + 1.0)// Use Psurface = 1.0 bar. | |
| 2210 * char_O_deco_time[i] // in minutes. | |
| 2211 * ascent_usage | |
|
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2212 // Plus usage during ascent to the next stop, at 10m/min. |
| 224 | 2213 + (char_O_deco_depth[i]*0.1 + 1.0) |
| 2214 * (char_O_deco_depth[i] - char_O_deco_depth[i+1]) * 0.1 | |
| 2215 * ascent_usage; | |
|
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2216 } |
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2217 |
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2218 //---- convert results for the ASM interface ----------------------------- |
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2219 for(i=0; i<5; ++i) |
| 224 | 2220 if( volumes[i] > 6553.4 ) |
| 2221 int_O_gas_volumes[i] = 65535; | |
|
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2222 else |
| 224 | 2223 int_O_gas_volumes[i] = (unsigned short)(volumes[i]*10.0 + 0.5); |
| 116 | 2224 } |
| 2225 | |
| 167 | 2226 ////////////////////////////////////////////////////////////////////////////// |
| 2227 | |
| 116 | 2228 void deco_push_tissues_to_vault(void) |
| 2229 { | |
| 167 | 2230 overlay unsigned char x; |
|
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2231 RESET_C_STACK |
| 167 | 2232 |
| 116 | 2233 cns_vault = CNS_fraction; |
| 167 | 2234 for (x=0;x<32;x++) |
| 2235 pres_tissue_vault[x] = pres_tissue[x]; | |
| 116 | 2236 } |
| 167 | 2237 |
| 116 | 2238 void deco_pull_tissues_from_vault(void) |
| 2239 { | |
| 167 | 2240 overlay unsigned char x; |
|
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2241 RESET_C_STACK |
| 167 | 2242 |
| 116 | 2243 CNS_fraction = cns_vault; |
| 167 | 2244 for (x=0;x<32;x++) |
| 2245 pres_tissue[x] = pres_tissue_vault[x]; | |
| 116 | 2246 } |
| 2247 | |
| 167 | 2248 ////////////////////////////////////////////////////////////////////////////// |
| 2249 // | |
| 184 | 2250 #ifndef CROSS_COMPILE |
| 2251 void main() {} | |
| 2252 #endif |