Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 248:571626276aaa
Logbook now shows gas changes in depth profile
| author | heinrichsweikamp |
|---|---|
| date | Tue, 29 Mar 2011 21:29:48 +0200 |
| parents | ce869aad7440 |
| children | f0cba9cff25c |
| 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. |
| 233 | 101 #define ppWVapour 0.0627 |
| 200 | 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 |
| 241 | 131 static unsigned char gas_switch_deepest(void); |
| 132 static void gas_switch_set(void); | |
| 217 | 133 |
| 241 | 134 static unsigned char calc_nextdecodepth(void); |
| 116 | 135 |
| 200 | 136 //---- Bank 4 parameters ----------------------------------------------------- |
| 163 | 137 #pragma udata bank4=0x400 |
| 116 | 138 |
| 139 static float temp_limit; | |
| 140 static float GF_low; | |
| 141 static float GF_high; | |
| 142 static float GF_delta; | |
| 192 | 143 static unsigned char low_depth; // Depth of deepest stop |
| 144 static float locked_GF_step; // GF_delta / low_depth | |
| 145 | |
| 146 static unsigned char temp_depth_limit; | |
| 171 | 147 |
| 192 | 148 // Simulation context: used to predict ascent. |
| 149 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 150 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 116 | 151 |
| 192 | 152 // Real context: what we are doing now. |
| 153 static float calc_lead_tissue_limit; // | |
| 116 | 154 |
|
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155 static unsigned char internal_deco_time[32]; |
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156 static unsigned char internal_deco_depth[32]; |
| 116 | 157 |
| 158 static float cns_vault; | |
| 159 static float pres_tissue_vault[32]; | |
| 160 | |
| 163 | 161 //---- Bank 5 parameters ----------------------------------------------------- |
| 162 #pragma udata bank5=0x500 | |
| 163 | |
| 167 | 164 static unsigned char ci; |
| 116 | 165 static float pres_respiration; |
| 166 static float pres_surface; | |
| 167 static float temp_deco; | |
| 236 | 168 static float ppN2; |
| 200 | 169 static float ppHe; |
| 116 | 170 static float temp_tissue; |
| 200 | 171 static float N2_ratio; // Breathed gas nitrogen ratio. |
| 172 static float He_ratio; // Breathed gas helium ratio. | |
| 173 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
| 174 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
| 175 static float var_He_a; // Bühlmann a, for current He tissue. | |
| 176 static float var_He_b; // Bühlmann b, for current He tissue. | |
| 177 static float var_N2_e; // Exposition, for current N2 tissue. | |
| 178 static float var_He_e; // Exposition, for current He tissue. | |
| 116 | 179 |
| 164 | 180 static float pres_diluent; // new in v.101 |
| 181 static float const_ppO2; // new in v.101 | |
| 182 static float deco_ppO2_change; // new in v.101 | |
| 183 static float deco_ppO2; // new in v.101 | |
| 116 | 184 |
| 241 | 185 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
| 186 static unsigned char sim_gas_last_used; // Number of 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 | |
| 225 | 197 static unsigned char deco_gas_change[5]; // new in v.109 |
| 167 | 198 |
| 163 | 199 //---- Bank 6 parameters ----------------------------------------------------- |
| 200 #pragma udata bank6=0x600 | |
| 116 | 201 |
| 197 | 202 float pres_tissue[32]; |
| 203 float pres_tissue_limit[16]; | |
| 204 float sim_pres_tissue_limit[16]; | |
| 116 | 205 |
| 163 | 206 //---- Bank 7 parameters ----------------------------------------------------- |
| 207 #pragma udata bank7=0x700 | |
| 208 | |
| 197 | 209 float sim_pres_tissue[32]; // 32 floats = 128 bytes. |
| 116 | 210 static float sim_pres_tissue_backup[32]; |
| 211 | |
| 163 | 212 //---- Bank 8 parameters ----------------------------------------------------- |
| 116 | 213 #pragma udata bank8=0x800 |
| 163 | 214 |
| 116 | 215 static char md_pi_subst[256]; |
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216 #define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
| 116 | 217 |
| 163 | 218 //---- Bank 9 parameters ----------------------------------------------------- |
| 167 | 219 #pragma udata bank9=0x900 |
| 116 | 220 |
| 163 | 221 static char md_state[48]; // DONT MOVE !! // has to be at the beginning of bank 9 for the asm code!!! |
| 116 | 222 |
| 164 | 223 // internal, dbg: |
| 167 | 224 static unsigned char DBG_char_I_deco_model; // new in v.108. |
| 164 | 225 static unsigned char DBG_char_I_depth_last_deco; // new in v.108 |
| 212 | 226 static unsigned char DBG_deco_gas_change; // new in v.108 |
| 224 | 227 static unsigned char DBG_deco_N2_ratio; // new in v.108 |
| 228 static unsigned char DBG_deco_He_ratio; // new in v.108 | |
| 164 | 229 static float DBG_pres_surface; // new in v.108 |
| 230 static float DBG_GF_low; // new in v.108 | |
| 231 static float DBG_GF_high; // new in v.108 | |
| 232 static float DBG_const_ppO2; // new in v.108 | |
| 233 static float DBG_deco_ppO2_change; // new in v.108 | |
| 234 static float DBG_deco_ppO2; // new in v.108 | |
| 235 static float DBG_float_saturation_multiplier; // new in v.108 | |
| 236 static float DBG_float_desaturation_multiplier; // new in v.108 | |
| 237 static float DBG_float_deco_distance; // new in v.108 | |
| 238 static float DBG_N2_ratio; // new in v.108 | |
| 239 static float DBG_He_ratio; // new in v.108 | |
| 240 | |
| 167 | 241 ////////////////////////////////////////////////////////////////////////////// |
| 242 ////////////////////////////////////////////////////////////////////////////// | |
| 243 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 244 ////////////////////////////////////////////////////////////////////////////// | |
| 245 ////////////////////////////////////////////////////////////////////////////// | |
| 246 // | |
| 247 // End of PROM code is 17F00, So push tables on PROM top... | |
| 248 // | |
| 249 #pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. | |
| 250 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) | |
| 116 | 251 |
| 167 | 252 // Magic table to compute the MD2 HASH |
| 253 // | |
| 254 #pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... | |
| 203 | 255 rom const rom unsigned short md_pi[] = |
| 116 | 256 { |
| 257 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 | |
| 258 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA | |
| 259 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 | |
| 260 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A | |
| 261 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 | |
| 262 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 | |
| 263 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 | |
| 264 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 | |
| 265 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 | |
| 266 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F | |
| 267 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 | |
| 268 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 | |
| 269 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A | |
| 270 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 | |
| 271 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A | |
| 272 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 | |
| 273 }; | |
| 274 | |
| 167 | 275 ////////////////////////////////////////////////////////////////////////////// |
| 276 ////////////////////////////////////////////////////////////////////////////// | |
| 277 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 278 ////////////////////////////////////////////////////////////////////////////// | |
| 279 ////////////////////////////////////////////////////////////////////////////// | |
| 280 // | |
| 116 | 281 // all new in v.102 |
| 282 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 283 | |
| 284 #pragma code p2_deco = 0x0C000 | |
| 285 | |
| 167 | 286 ////////////////////////////////////////////////////////////////////////////// |
| 287 // DBS - debug on start of dive | |
| 288 // | |
| 289 static void create_dbs_set_dbg_and_ndl20mtr(void) | |
| 116 | 290 { |
| 167 | 291 overlay char i; // Local loop index. |
| 292 | |
| 293 //---- Reset DEBUG bit fields -------------------------------------------- | |
| 116 | 294 int_O_DBS_bitfield = 0; |
| 295 int_O_DBS2_bitfield = 0; | |
| 296 if(int_O_DBG_pre_bitfield & DBG_RUN) | |
| 297 int_O_DBG_pre_bitfield = DBG_RESTART; | |
| 298 else | |
| 299 int_O_DBG_pre_bitfield = DBG_RUN; | |
| 300 int_O_DBG_post_bitfield = 0; | |
| 167 | 301 |
| 302 //---- Set 20meters ND limit --------------------------------------------- | |
| 116 | 303 char_O_NDL_at_20mtr = 255; |
| 304 | |
| 167 | 305 //---- Copy all dive parameters ------------------------------------------ |
| 116 | 306 DBG_N2_ratio = N2_ratio; |
| 307 DBG_He_ratio = He_ratio; | |
| 308 DBG_char_I_deco_model = char_I_deco_model; | |
| 309 DBG_char_I_depth_last_deco = char_I_depth_last_deco; | |
| 310 DBG_pres_surface = pres_surface; | |
| 311 DBG_GF_low = GF_low; | |
| 312 DBG_GF_high = GF_high; | |
| 313 DBG_const_ppO2 = const_ppO2; | |
| 314 DBG_deco_ppO2_change = deco_ppO2_change; | |
| 315 DBG_deco_ppO2 = deco_ppO2; | |
| 224 | 316 DBG_deco_N2_ratio = char_I_deco_N2_ratio[0]; |
| 317 DBG_deco_He_ratio = char_I_deco_He_ratio[0]; | |
| 225 | 318 DBG_deco_gas_change = deco_gas_change[0]; |
| 116 | 319 DBG_float_saturation_multiplier = float_saturation_multiplier; |
| 320 DBG_float_desaturation_multiplier = float_desaturation_multiplier; | |
| 321 DBG_float_deco_distance = float_deco_distance; | |
| 322 | |
| 167 | 323 //---- Setup some error (?) conditions ----------------------------------- |
| 116 | 324 if(char_I_deco_model) |
| 325 int_O_DBS_bitfield |= DBS_mode; | |
| 326 if(const_ppO2) | |
| 327 int_O_DBS_bitfield |= DBS_ppO2; | |
| 167 | 328 for(i = 16; i < 32; i++) |
| 329 if(pres_tissue[i]) | |
| 116 | 330 int_O_DBS_bitfield |= DBS_HE_sat; |
| 331 if(deco_ppO2_change) | |
| 332 int_O_DBS_bitfield |= DBS_ppO2chg; | |
| 333 if(float_saturation_multiplier < 0.99) | |
| 334 int_O_DBS_bitfield |= DBS_SAT2l; | |
| 335 if(float_saturation_multiplier > 1.3) | |
| 336 int_O_DBS_bitfield |= DBS_SAT2h; | |
| 337 if(GF_low < 0.19) | |
| 338 int_O_DBS_bitfield |= DBS_GFLOW2l; | |
| 339 if(GF_low > 1.01) | |
| 340 int_O_DBS_bitfield |= DBS_GFLOW2h; | |
| 341 if(GF_high < 0.6) | |
| 342 int_O_DBS_bitfield |= DBS_GFHGH2l; | |
| 343 if(GF_high > 1.01) | |
| 344 int_O_DBS_bitfield |= DBS_GFHGH2h; | |
| 345 if((N2_ratio + He_ratio) > 0.95) | |
| 346 int_O_DBS_bitfield |= DBS_GASO22l; | |
| 347 if((N2_ratio + He_ratio) < 0.05) | |
| 348 int_O_DBS_bitfield |= DBS_GASO22h; | |
| 349 if(float_deco_distance > 0.25) | |
| 350 int_O_DBS_bitfield |= DBS_DIST2h; | |
| 351 if(char_I_depth_last_deco > 8) | |
| 352 int_O_DBS_bitfield |= DBS_LAST2h; | |
| 224 | 353 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) > 95)) |
| 116 | 354 int_O_DBS_bitfield |= DBS_DECOO2l; |
| 224 | 355 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) < 5)) |
| 116 | 356 int_O_DBS_bitfield |= DBS_DECOO2h; |
| 357 if(pres_respiration > 3.0) | |
| 358 int_O_DBS2_bitfield |= DBS2_PRES2h; | |
| 359 if(pres_surface - pres_respiration > 0.2) | |
| 360 int_O_DBS2_bitfield |= DBS2_PRES2l; | |
| 361 if(pres_surface < 0.75) | |
| 362 int_O_DBS2_bitfield |= DBS2_SURF2l; | |
| 363 if(pres_surface > 1.11) | |
| 364 int_O_DBS2_bitfield |= DBS2_SURF2h; | |
| 365 if(float_desaturation_multiplier < 0.70) | |
| 366 int_O_DBS2_bitfield |= DBS2_DESAT2l; | |
| 367 if(float_desaturation_multiplier > 1.01) | |
| 368 int_O_DBS2_bitfield |= DBS2_DESAT2h; | |
| 369 if(GF_low > GF_high) | |
| 370 int_O_DBS2_bitfield |= DBS2_GFDneg; | |
| 371 } | |
| 372 | |
| 167 | 373 ////////////////////////////////////////////////////////////////////////////// |
| 374 // DBG - set DBG to end_of_dive | |
| 375 // | |
| 376 static void set_dbg_end_of_dive(void) | |
| 116 | 377 { |
| 378 int_O_DBG_pre_bitfield &= (~DBG_RUN); | |
| 379 int_O_DBG_post_bitfield &= (~DBG_RUN); | |
| 380 } | |
| 381 | |
| 167 | 382 ////////////////////////////////////////////////////////////////////////////// |
| 383 // DBG - NDL at first 20 m. hit | |
| 384 // | |
| 385 static void check_ndl(void) | |
| 116 | 386 { |
| 167 | 387 if( char_O_NDL_at_20mtr == 255 // Still in NDL mode ? |
| 388 && int_I_pres_respiration > 3000 // And we hit the 20m limit ? | |
| 389 ) | |
| 116 | 390 { |
| 167 | 391 char_O_NDL_at_20mtr = char_O_nullzeit; // change to max bottom time. |
| 392 if( char_O_NDL_at_20mtr == 255) // and avoid confusion. | |
| 184 | 393 char_O_NDL_at_20mtr = 254; |
| 116 | 394 } |
| 395 } | |
| 396 | |
| 167 | 397 ////////////////////////////////////////////////////////////////////////////// |
| 398 // DBG - multi main during dive | |
| 399 // | |
| 184 | 400 static void check_dbg(PARAMETER char is_post_check) |
| 116 | 401 { |
| 203 | 402 overlay unsigned short temp_DBS = 0; |
| 200 | 403 overlay unsigned char i; // Local loop index. |
| 167 | 404 |
| 116 | 405 if( (DBG_N2_ratio != N2_ratio) || (DBG_He_ratio != He_ratio) ) |
| 406 temp_DBS |= DBG_c_gas; | |
| 407 if(DBG_const_ppO2 != const_ppO2) | |
| 408 temp_DBS |= DBG_c_ppO2; | |
| 167 | 409 if( DBG_float_saturation_multiplier != float_saturation_multiplier |
| 410 || DBG_float_desaturation_multiplier != float_desaturation_multiplier | |
| 411 ) | |
| 116 | 412 temp_DBS |= DBG_CdeSAT; |
| 413 if(DBG_char_I_deco_model != char_I_deco_model) | |
| 414 temp_DBS |= DBG_C_MODE; | |
| 415 if(DBG_pres_surface != pres_surface) | |
| 416 temp_DBS |= DBG_C_SURF; | |
| 167 | 417 |
| 418 if( !DBS_HE_sat && !He_ratio) | |
| 419 for(i = 16; i < 32; i++) | |
| 420 if(pres_tissue[i]) | |
| 116 | 421 temp_DBS |= DBG_HEwoHE; |
| 167 | 422 |
| 116 | 423 if(DBG_deco_ppO2 != deco_ppO2) |
| 424 temp_DBS |= DBG_C_DPPO2; | |
| 167 | 425 |
| 225 | 426 if( DBG_deco_gas_change != deco_gas_change[0] |
| 224 | 427 || DBG_deco_N2_ratio != char_I_deco_N2_ratio[0] |
| 428 || DBG_deco_He_ratio != char_I_deco_He_ratio[0] ) | |
| 116 | 429 temp_DBS |= DBG_C_DGAS; |
| 167 | 430 |
| 116 | 431 if(DBG_float_deco_distance != float_deco_distance) |
| 432 temp_DBS |= DBG_C_DIST; | |
| 433 if(DBG_char_I_depth_last_deco != char_I_depth_last_deco) | |
| 434 temp_DBS |= DBG_C_LAST; | |
| 167 | 435 if( DBG_GF_low != GF_low |
| 436 || DBG_GF_high != GF_high ) | |
| 116 | 437 temp_DBS |= DBG_C_GF; |
| 438 if(pres_respiration > 13.0) | |
| 439 temp_DBS |= DBG_PHIGH; | |
| 440 if(pres_surface - pres_respiration > 0.2) | |
| 441 temp_DBS |= DBG_PLOW; | |
| 442 if(is_post_check) | |
| 443 int_O_DBG_post_bitfield |= temp_DBS; | |
| 444 else | |
| 445 int_O_DBG_pre_bitfield |= temp_DBS; | |
| 446 } | |
| 447 | |
| 167 | 448 ////////////////////////////////////////////////////////////////////////////// |
| 449 // DBG - prior to calc. of dive | |
| 450 // | |
| 451 static void check_pre_dbg(void) | |
| 116 | 452 { |
| 453 check_dbg(0); | |
| 454 } | |
| 455 | |
| 167 | 456 ////////////////////////////////////////////////////////////////////////////// |
| 457 // DBG - after decocalc of dive | |
| 458 // | |
| 459 static void check_post_dbg(void) | |
| 116 | 460 { |
| 461 check_dbg(1); | |
| 462 } | |
| 463 | |
| 165 | 464 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 465 ////////////////////////////////////////////////////////////////////////////// |
| 466 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 467 ////////////////////////////////////////////////////////////////////////////// | |
| 468 ////////////////////////////////////////////////////////////////////////////// | |
| 469 | |
| 235 | 470 ////////////////////////////////////////////////////////////////////////////// |
| 471 #ifdef __DEBUG | |
| 472 void assert_failed(PARAMETER short int line) | |
| 473 { | |
| 474 extern void PLED_resetdebugger(void); | |
| 475 extern unsigned short temp10; | |
| 476 | |
| 477 temp10 = line; | |
| 478 PLED_resetdebugger(); | |
| 479 } | |
| 480 #endif | |
| 481 ////////////////////////////////////////////////////////////////////////////// | |
| 482 // When calling C code from ASM context, the data stack pointer and | |
| 483 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
| 484 | |
| 485 #ifdef CROSS_COMPILE | |
| 486 # define RESET_C_STACK | |
| 487 #else | |
| 488 # ifdef __DEBUG | |
| 489 # define RESET_C_STACK fillDataStack(); | |
| 490 void fillDataStack(void) | |
| 491 { | |
| 492 _asm | |
| 493 LFSR 1,C_STACK | |
| 494 MOVLW 0xCC | |
| 495 loop: MOVWF POSTINC1,0 | |
| 496 TSTFSZ FSR1L,0 | |
| 497 BRA loop | |
| 498 | |
| 499 LFSR 1,C_STACK | |
| 500 LFSR 2,C_STACK | |
| 501 _endasm | |
| 502 } | |
| 503 # else | |
| 504 # define RESET_C_STACK \ | |
| 505 _asm \ | |
| 506 LFSR 1, C_STACK \ | |
| 507 LFSR 2, C_STACK \ | |
| 508 _endasm | |
| 509 # endif | |
| 510 #endif | |
| 511 | |
| 512 ////////////////////////////////////////////////////////////////////////////// | |
| 513 | |
| 203 | 514 static short read_custom_function(PARAMETER unsigned char cf) |
| 167 | 515 { |
| 184 | 516 #ifdef CROSS_COMPILE |
| 517 extern unsigned short custom_functions[]; | |
| 518 return custom_functions[cf]; | |
| 519 #else | |
| 167 | 520 extern unsigned char hi, lo; |
| 521 extern void getcustom15(); | |
| 522 _asm | |
| 523 movff cf,WREG | |
| 524 call getcustom15,0 | |
| 525 movff lo,PRODL | |
| 526 movff hi,PRODH | |
| 527 _endasm | |
| 184 | 528 #endif |
| 167 | 529 } |
| 530 | |
| 531 ////////////////////////////////////////////////////////////////////////////// | |
| 165 | 532 // read buhlmann tables for compatriment ci |
| 167 | 533 // If period == 0 : 2sec interval |
| 534 // 1 : 1 min interval | |
| 535 // 2 : 10 min interval. | |
| 184 | 536 static void read_buhlmann_coefficients(PARAMETER char period) |
| 165 | 537 { |
| 184 | 538 #ifndef CROSS_COMPILE |
| 167 | 539 // Note: we don't use far rom pointer, because the |
| 540 // 24 bits is to complex, hence we have to set | |
| 541 // the UPPER page ourself... | |
| 542 // --> Set zero if tables are moved to lower pages ! | |
| 543 _asm | |
| 544 movlw 1 | |
| 545 movwf TBLPTRU,0 | |
| 546 _endasm | |
| 184 | 547 #endif |
| 197 | 548 assert( 0 <= ci && ci < 16 ); |
| 167 | 549 |
| 165 | 550 var_N2_a = buhlmann_a[ci]; |
| 551 var_N2_b = buhlmann_b[ci]; | |
| 167 | 552 var_He_a = (buhlmann_a+16)[ci]; |
| 553 var_He_b = (buhlmann_b+16)[ci]; | |
| 554 | |
| 165 | 555 // Check reading consistency: |
| 556 if( (var_N2_a < 0.231) | |
| 557 || (var_N2_a > 1.27) | |
| 558 || (var_N2_b < 0.504) | |
| 559 || (var_N2_b > 0.966) | |
| 560 || (var_He_a < 0.510) | |
| 561 || (var_He_a > 1.75) | |
| 562 || (var_He_b < 0.423) | |
| 563 || (var_He_b > 0.927) | |
| 564 ) | |
| 565 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 167 | 566 |
| 165 | 567 // Integration intervals. |
| 167 | 568 switch(period) |
| 165 | 569 { |
| 167 | 570 case -1://---- no interval ----------------------------------------------- |
| 571 var_N2_e = var_He_e = 0.0; | |
| 572 break; | |
| 573 | |
| 165 | 574 case 0: //---- 2 sec ----------------------------------------------------- |
| 575 var_N2_e = e2secs[ci]; | |
| 167 | 576 var_He_e = (e2secs+16)[ci]; |
| 165 | 577 |
| 578 // Check reading consistency: | |
| 579 if( (var_N2_e < 0.0000363) | |
| 580 || (var_N2_e > 0.00577) | |
| 581 || (var_He_e < 0.0000961) | |
| 582 || (var_He_e > 0.150) | |
| 583 ) | |
| 584 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 585 | |
| 586 break; | |
| 587 | |
| 588 case 1: //---- 1 min ----------------------------------------------------- | |
| 589 var_N2_e = e1min[ci]; | |
| 167 | 590 var_He_e = (e1min+16)[ci]; |
| 165 | 591 |
| 592 // Check reading consistency: | |
| 593 if( (var_N2_e < 1.09E-3) | |
| 594 || (var_N2_e > 0.1592) | |
| 595 || (var_He_e < 0.00288) | |
| 596 || (var_He_e > 0.3682) | |
| 597 ) | |
| 598 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 599 | |
| 600 break; | |
| 601 | |
| 602 case 2: //---- 10 min ---------------------------------------------------- | |
| 603 var_N2_e = e10min[ci]; | |
| 167 | 604 var_He_e = (e10min+16)[ci]; |
| 165 | 605 |
| 606 // Check reading consistency: | |
| 607 if( (var_N2_e < 0.01085) | |
| 608 || (var_N2_e > 0.82323) | |
| 609 || (var_He_e < 0.02846) | |
| 610 || (var_He_e > 0.98986) | |
| 611 ) | |
| 612 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 613 | |
| 614 break; | |
| 197 | 615 |
| 616 default: | |
| 617 assert(0); // Never go there... | |
| 165 | 618 } |
| 619 } | |
| 620 | |
| 621 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 622 // calc_next_decodepth_GF |
| 165 | 623 // |
| 116 | 624 // new in v.102 |
| 165 | 625 // |
| 116 | 626 // INPUT, changing during dive: |
| 192 | 627 // low_depth |
| 167 | 628 // |
| 116 | 629 // INPUT, fixed during dive: |
| 167 | 630 // pres_surface |
| 631 // GF_delta | |
| 632 // GF_high | |
| 633 // GF_low | |
| 171 | 634 // char_I_depth_last_deco |
| 167 | 635 // float_deco_distance |
| 636 // | |
| 241 | 637 // RETURN TRUE iff a stop is needed. |
| 638 // | |
| 116 | 639 // OUTPUT |
| 171 | 640 // locked_GF_step |
| 167 | 641 // temp_depth_limt |
| 192 | 642 // low_depth |
| 167 | 643 // |
| 241 | 644 static unsigned char calc_nextdecodepth(void) |
| 167 | 645 { |
| 241 | 646 //--- Max ascent speed --------------------------------------------------- |
| 647 // Recompute leading gas limit, at current depth: | |
| 648 overlay float depth = (temp_deco - pres_surface) / 0.09985; | |
| 649 | |
| 650 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 651 overlay float min_depth = depth - 10.0; | |
| 652 | |
| 653 // Do we need to stop at current depth ? | |
| 654 overlay unsigned char need_stop = 0; | |
| 655 | |
| 656 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 657 assert( low_depth < 255 ); | |
| 658 | |
| 212 | 659 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
| 116 | 660 if (char_I_deco_model == 1) |
| 661 { | |
| 241 | 662 if( depth >= low_depth ) |
| 192 | 663 sim_limit( GF_low ); |
| 664 else | |
| 665 sim_limit( GF_high - depth * locked_GF_step ); | |
| 666 | |
| 667 // Stops are needed ? | |
| 668 if( sim_lead_tissue_limit > pres_surface ) | |
| 669 { | |
| 241 | 670 // Deepest stop, in meter (rounded up with a margin of 0.5m) |
| 671 overlay unsigned char first_stop = 3 * (short)(0.83 + (sim_lead_tissue_limit - pres_surface) / 0.29955); | |
| 192 | 672 assert( first_stop < 128 ); |
| 171 | 673 |
| 212 | 674 // Apply correction for the shallowest stop. |
| 192 | 675 if( first_stop == 3 ) // new in v104 |
| 676 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 171 | 677 |
| 192 | 678 // Check all stops until one is higher than tolerated presure |
| 679 while(first_stop > 0) | |
| 680 { | |
| 681 overlay unsigned char next_stop; // Next index (0..30) | |
| 682 overlay float pres_stop; // Next depth (0m..90m) | |
| 171 | 683 |
| 241 | 684 // Check max speed, or reaching surface. |
| 685 if( first_stop <= min_depth ) | |
| 686 break; | |
| 687 | |
| 688 // So, there is indeed a stop needed: | |
| 689 need_stop = 1; | |
| 690 | |
| 192 | 691 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
| 692 next_stop = 0; | |
| 216 | 693 else if( first_stop == 6 ) |
| 694 next_stop = char_I_depth_last_deco; | |
| 192 | 695 else |
| 696 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 167 | 697 |
| 241 | 698 pres_stop = next_stop * 0.09985 // Meters to bar |
| 192 | 699 + pres_surface; |
| 700 | |
| 212 | 701 // Keep GF_low until a first stop depth is found: |
| 702 if( next_stop >= low_depth ) | |
| 703 sim_limit( GF_low ); | |
| 704 else | |
| 705 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 706 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 707 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 171 | 708 |
| 192 | 709 // upper limit (lowest pressure tolerated): |
| 710 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 711 break; | |
| 712 | |
| 713 // Else, validate that stop and loop... | |
| 714 first_stop = next_stop; | |
| 715 } | |
| 171 | 716 |
| 212 | 717 // Is it a new deepest first stop ? If yes this is the reference for |
| 718 // the varying gradient factor. So reset that: | |
| 241 | 719 if( first_stop > min_depth && first_stop > low_depth ) |
| 212 | 720 { |
| 721 // Store the deepest stop depth, as reference for GF_low. | |
| 722 low_depth = first_stop; | |
| 723 locked_GF_step = GF_delta / low_depth; | |
| 724 } | |
| 725 | |
| 726 // next stop is the last validated depth found, aka first_stop | |
| 192 | 727 temp_depth_limit = first_stop; // Stop depth, in meter. |
| 728 } | |
| 171 | 729 else |
| 192 | 730 temp_depth_limit = 0; // stop depth, in meter. |
| 116 | 731 } |
| 167 | 732 else //---- ZH-L16 model ------------------------------------------------- |
| 116 | 733 { |
| 192 | 734 overlay float pres_gradient; |
| 735 | |
| 736 // Original model | |
| 116 | 737 // optimized in v.101 |
| 171 | 738 // char_I_depth_last_deco included in v.101 |
| 116 | 739 |
| 192 | 740 // Compute sim_lead_tissue_limit too, but just once. |
| 741 sim_limit(1.0); | |
| 742 | |
| 743 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 167 | 744 if (pres_gradient >= 0) |
| 116 | 745 { |
| 241 | 746 pres_gradient /= 0.29955; // Bar --> stop number; |
| 203 | 747 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> meter : depth for deco |
| 241 | 748 need_stop = 1; // Hit. |
| 749 | |
| 750 // Implement last stop at 4m/5m/6m... | |
| 751 if( temp_depth_limit == 3 ) | |
| 752 temp_depth_limit = char_I_depth_last_deco; | |
| 171 | 753 } |
| 116 | 754 else |
| 241 | 755 temp_depth_limit = 0; |
| 171 | 756 } |
| 212 | 757 |
| 217 | 758 //---- Check gas change -------------------------------------------------- |
| 241 | 759 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
| 760 | |
| 761 return need_stop; | |
| 167 | 762 } |
| 116 | 763 |
| 167 | 764 ////////////////////////////////////////////////////////////////////////////// |
|
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765 // copy_deco_table |
| 167 | 766 // |
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767 // Buffer the stops, once computed, so we can continue to display them |
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768 // while computing the next set. |
| 167 | 769 // |
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770 static void copy_deco_table(void) |
| 116 | 771 { |
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772 // Copy depth of the first (deepest) stop, because when reversing |
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773 // order, it will be hard to find... |
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774 char_O_first_deco_depth = internal_deco_depth[0]; |
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775 char_O_first_deco_time = internal_deco_time [0]; |
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776 |
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777 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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778 { |
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779 overlay unsigned char x, y; |
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780 |
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781 //---- First: search the first non-null depth |
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782 for(x=31; x != 0; --x) |
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783 if( internal_deco_depth[x] != 0 ) break; |
| 116 | 784 |
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785 //---- Second: copy to output table (in reverse order) |
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786 for(y=0; y<32; y++, --x) |
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787 { |
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788 char_O_deco_depth[y] = internal_deco_depth[x]; |
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789 char_O_deco_time [y] = internal_deco_time [x]; |
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790 |
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791 // Stop only once the last transfer is done. |
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792 if( x == 0 ) break; |
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793 } |
| 116 | 794 |
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795 //---- Third: fill table end with null |
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796 for(y++; y<32; y++) |
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797 { |
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798 char_O_deco_time [y] = 0; |
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799 char_O_deco_depth[y] = 0; |
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800 } |
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801 } |
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802 else //---- Straight copy ------------------------------------------------ |
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803 { |
| 167 | 804 overlay unsigned char x; |
| 805 | |
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806 for(x=0; x<32; x++) |
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807 { |
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808 char_O_deco_depth[x] = internal_deco_depth[x]; |
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809 char_O_deco_time [x] = internal_deco_time [x]; |
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810 } |
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811 } |
| 167 | 812 } |
| 116 | 813 |
| 167 | 814 ////////////////////////////////////////////////////////////////////////////// |
| 116 | 815 // temp_tissue_safety // |
| 167 | 816 // |
| 116 | 817 // outsourced in v.102 |
| 167 | 818 // |
| 819 // Apply safety factors for brand ZH-L16 model. | |
| 820 // | |
| 821 static void temp_tissue_safety(void) | |
| 116 | 822 { |
| 197 | 823 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
| 824 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 825 | |
| 167 | 826 if( char_I_deco_model == 0 ) |
| 116 | 827 { |
| 828 if (temp_tissue < 0.0) | |
| 126 | 829 temp_tissue *= float_desaturation_multiplier; |
| 116 | 830 else |
| 126 | 831 temp_tissue *= float_saturation_multiplier; |
| 116 | 832 } |
| 167 | 833 } |
| 116 | 834 |
| 167 | 835 ////////////////////////////////////////////////////////////////////////////// |
| 836 ////////////////////////////////////////////////////////////////////////////// | |
| 116 | 837 // ** THE JUMP-IN CODE ** |
| 838 // ** for the asm code ** | |
| 167 | 839 ////////////////////////////////////////////////////////////////////////////// |
| 840 ////////////////////////////////////////////////////////////////////////////// | |
|
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841 |
| 167 | 842 ////////////////////////////////////////////////////////////////////////////// |
|
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843 // Called every 2 seconds during diving. |
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844 // update tissues every time. |
| 184 | 845 // |
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846 // Every 6 seconds (or slower when TTS > 16): |
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847 // - update deco table (char_O_deco_time/depth) with new values. |
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848 // - update ascent time, |
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849 // - set status to zero (so we can check there is new results). |
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850 // |
| 116 | 851 void deco_calc_hauptroutine(void) |
| 852 { | |
|
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853 RESET_C_STACK |
| 116 | 854 calc_hauptroutine(); |
| 855 int_O_desaturation_time = 65535; | |
| 856 } | |
| 857 | |
| 167 | 858 ////////////////////////////////////////////////////////////////////////////// |
| 184 | 859 // Reset decompression model: |
| 860 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 861 // + Reset last stop to 0m | |
| 862 // + Reset all model output. | |
| 116 | 863 void deco_clear_tissue(void) |
| 864 { | |
|
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865 RESET_C_STACK |
| 116 | 866 clear_tissue(); |
| 867 } | |
| 868 | |
| 167 | 869 ////////////////////////////////////////////////////////////////////////////// |
| 870 | |
| 116 | 871 void deco_calc_wo_deco_step_1_min(void) |
| 872 { | |
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873 RESET_C_STACK |
| 116 | 874 calc_wo_deco_step_1_min(); |
| 875 deco_calc_desaturation_time(); | |
| 876 } | |
| 877 | |
| 167 | 878 ////////////////////////////////////////////////////////////////////////////// |
| 879 | |
| 116 | 880 void deco_debug(void) |
| 881 { | |
|
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882 RESET_C_STACK |
| 116 | 883 } |
| 884 | |
| 241 | 885 |
| 886 ////////////////////////////////////////////////////////////////////////////// | |
| 887 // Find current gas in the list (if any). | |
| 888 // | |
| 889 // Input: char_I_deco_N2_ratio[] and He, to detect breathed gas. | |
| 890 // | |
| 891 // Output: sim_gas_depth_used | |
| 892 // | |
| 893 static void gas_switch_find_current(void) | |
| 894 { | |
|
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895 overlay unsigned char j; |
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896 overlay unsigned char N2 = (unsigned char)(N2_ratio * 100 + 0.5); |
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897 overlay unsigned char He = (unsigned char)(He_ratio * 100 + 0.5); |
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898 |
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899 for(j=0; j<5; ++j) |
| 241 | 900 { |
|
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901 // Make sure to detect if we are already breathing some gas in |
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902 // the current list (happends when first gas do have a depth). |
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903 if( N2 == char_I_deco_N2_ratio[j] |
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904 && He == char_I_deco_He_ratio[j] |
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905 ) |
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906 { |
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907 temp_depth_limit = sim_gas_last_depth = char_I_deco_gas_change[j]; |
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908 sim_gas_last_used = j+1; |
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909 break; |
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910 } |
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911 } |
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912 |
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913 // If there is no gas-switch-delay running ? |
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914 if( sim_gas_delay <= sim_dive_mins) |
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915 { |
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916 // Compute current depth: |
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917 overlay unsigned char depth = (unsigned char)((pres_respiration - pres_surface) / 0.09985); |
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918 assert( depth < 130 ); |
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919 |
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920 // And if I'm above the last decostop (with the 3m margin) ? |
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921 if( (sim_gas_last_depth-3) > depth ) |
| 241 | 922 { |
|
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923 for(j=0; j<5; ++j) |
| 241 | 924 { |
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925 // And If I am in the range of a valide stop ? |
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926 // (again, with the same 3m margin) |
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927 if( char_I_deco_gas_change[j] |
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928 && depth <= char_I_deco_gas_change[j] |
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929 && depth >= (char_I_deco_gas_change[j] - 3) |
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930 ) |
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931 { |
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932 // Then start gas-switch timer there, |
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933 sim_gas_delay = sim_dive_mins |
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934 + read_custom_function(55); |
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935 |
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936 // And make sure decostop will be recorded at the right depth. |
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937 temp_depth_limit = char_I_deco_gas_change[j]; |
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938 break; |
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939 } |
| 241 | 940 } |
| 941 } | |
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942 else |
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943 // Make clear there is no deay anymore. |
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944 sim_gas_delay = 0; |
| 241 | 945 } |
| 946 } | |
| 947 | |
| 167 | 948 ////////////////////////////////////////////////////////////////////////////// |
| 217 | 949 // Find deepest available gas. |
| 201 | 950 // |
| 241 | 951 // Input: temp_depth_limit, |
| 952 // deco_gas_change[] | |
| 953 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
| 212 | 954 // |
| 241 | 955 // RETURNS TRUE if a stop is needed for gas switch. |
| 956 // | |
| 957 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
| 212 | 958 // |
| 241 | 959 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
| 960 // are null), or during the ascent to make sure we are not passing a | |
| 961 // stop (in which case both can be already set). | |
| 962 // | |
| 963 static unsigned char gas_switch_deepest(void) | |
| 201 | 964 { |
| 241 | 965 overlay unsigned char switch_deco = 0, switch_last = 0; |
| 201 | 966 |
| 967 if (char_I_const_ppO2 == 0) | |
| 968 { | |
| 225 | 969 overlay unsigned char j; |
| 970 | |
| 241 | 971 // Loop over all enabled gas, to find the deepest one, |
| 972 // above las gas, but below temp_depth_limit. | |
| 973 for(j=0; j<5; ++j) | |
| 225 | 974 { |
| 241 | 975 // Gas not (yet) allowed ? Skip ! |
| 976 if( temp_depth_limit > deco_gas_change[j] ) | |
| 977 continue; | |
| 978 | |
| 979 // Gas deeper than the current/previous one ? Skip ! | |
| 980 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) | |
| 981 continue; | |
| 982 | |
| 983 // First, or deeper ? | |
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984 if( switch_deco < deco_gas_change[j] ) |
| 241 | 985 { |
| 986 switch_deco = deco_gas_change[j]; | |
| 987 switch_last = j+1; | |
| 988 } | |
| 225 | 989 } |
| 201 | 990 } |
| 991 | |
| 203 | 992 // If there is a better gas available |
| 241 | 993 if( switch_deco ) |
| 201 | 994 { |
| 241 | 995 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
| 201 | 996 |
| 241 | 997 // Should restart gas-switch delay only when gas do changes... |
| 998 assert( sim_gas_delay <= sim_dive_mins ); | |
| 217 | 999 |
| 241 | 1000 sim_gas_last_depth = switch_deco; |
| 1001 sim_gas_last_used = switch_last; | |
| 1002 sim_gas_delay = read_custom_function(55); | |
| 217 | 1003 |
| 241 | 1004 // Apply depth correction ONLY if CF#55 is not null: |
| 1005 if( sim_gas_delay > 0 ) | |
| 225 | 1006 { |
| 241 | 1007 sim_gas_delay += sim_dive_mins; |
| 1008 temp_depth_limit = switch_deco; | |
| 1009 return 1; | |
| 225 | 1010 } |
| 241 | 1011 |
| 1012 return 0; | |
| 217 | 1013 } |
| 1014 | |
| 241 | 1015 sim_gas_delay = 0; |
| 1016 return 0; | |
| 217 | 1017 } |
| 1018 | |
| 1019 ////////////////////////////////////////////////////////////////////////////// | |
| 1020 // Calculate gas switches | |
| 1021 // | |
| 1022 // | |
| 1023 // Input: N2_ratio, He_ratio. | |
| 1024 // sim_gas_last_used | |
| 1025 // | |
| 1026 // Output: calc_N2_ratio, calc_He_ratio | |
| 1027 // | |
| 241 | 1028 static void gas_switch_set(void) |
| 217 | 1029 { |
| 224 | 1030 assert( 0 <= sim_gas_last_used && sim_gas_last_used <= 5 ); |
| 217 | 1031 |
| 224 | 1032 if( sim_gas_last_used == 0 ) |
| 1033 { | |
| 1034 calc_N2_ratio = N2_ratio; | |
| 1035 calc_He_ratio = He_ratio; | |
| 1036 } | |
| 1037 else | |
| 1038 { | |
| 1039 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
| 1040 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
| 217 | 1041 } |
| 201 | 1042 |
| 1043 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
| 1044 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
| 1045 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
| 1046 } | |
| 1047 | |
| 1048 ////////////////////////////////////////////////////////////////////////////// | |
| 1049 // | |
| 212 | 1050 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
| 1051 // temp_deco : simulated respiration pressure + security offset (deco_distance) | |
| 1052 // Water-vapor pressure inside lumbs (ppWVapour). | |
| 1053 // | |
| 236 | 1054 // Output: ppN2, ppHe. |
| 212 | 1055 // |
| 1056 static void sim_alveolar_presures(void) | |
| 201 | 1057 { |
| 212 | 1058 overlay float deco_diluent = temp_deco; // new in v.101 |
| 1059 | |
| 1060 //---- CCR mode : deco gas switch ? -------------------------------------- | |
| 201 | 1061 if (char_I_const_ppO2 != 0) |
| 1062 { | |
| 212 | 1063 // In CCR mode, calc_XX_ratio == XX_ratio. |
| 1064 if( temp_deco > deco_ppO2_change ) | |
| 1065 deco_diluent = ((temp_deco - const_ppO2)/(calc_N2_ratio + calc_He_ratio)); | |
| 201 | 1066 else |
| 212 | 1067 deco_diluent = ((temp_deco - deco_ppO2)/(calc_N2_ratio + calc_He_ratio)); |
| 1068 | |
| 1069 if (deco_diluent > temp_deco) | |
| 1070 deco_diluent = temp_deco; | |
| 201 | 1071 } |
| 1072 | |
| 212 | 1073 // Take deco offset into account, but not at surface. |
| 1074 if( deco_diluent > pres_surface ) | |
| 1075 deco_diluent += float_deco_distance; | |
| 1076 | |
| 1077 if( deco_diluent > ppWVapour ) | |
| 201 | 1078 { |
| 236 | 1079 ppN2 = calc_N2_ratio * (deco_diluent - ppWVapour); |
| 201 | 1080 ppHe = calc_He_ratio * (deco_diluent - ppWVapour); |
| 1081 } | |
| 1082 else | |
| 1083 { | |
| 236 | 1084 ppN2 = 0.0; |
| 201 | 1085 ppHe = 0.0; |
| 1086 } | |
| 236 | 1087 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
| 201 | 1088 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
| 1089 } | |
| 1090 | |
| 1091 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 1092 // clear_tissue |
| 1093 // | |
| 165 | 1094 // optimized in v.101 (var_N2_a) |
| 167 | 1095 // |
| 1096 // preload tissues with standard pressure for the given ambient pressure. | |
| 1097 // Note: fixed N2_ratio for standard air. | |
| 201 | 1098 // |
| 167 | 1099 static void clear_tissue(void) |
| 116 | 1100 { |
| 1101 flag_in_divemode = 0; | |
| 1102 int_O_DBS_bitfield = 0; | |
| 1103 int_O_DBS2_bitfield = 0; | |
| 1104 int_O_DBG_pre_bitfield = 0; | |
| 1105 int_O_DBG_post_bitfield = 0; | |
| 1106 char_O_NDL_at_20mtr = 255; | |
| 1107 | |
| 167 | 1108 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
| 1109 N2_ratio = 0.7902; | |
| 212 | 1110 pres_respiration = int_I_pres_respiration * 0.001; |
| 164 | 1111 |
| 167 | 1112 for(ci=0; ci<16; ci++) |
| 126 | 1113 { |
| 197 | 1114 // cycle through the 16 Bühlmann tissues |
| 200 | 1115 overlay float p = N2_ratio * (pres_respiration - ppWVapour); |
| 164 | 1116 pres_tissue[ci] = p; |
| 197 | 1117 |
| 184 | 1118 read_buhlmann_coefficients(-1); |
| 165 | 1119 |
| 1120 p = (p - var_N2_a) * var_N2_b ; | |
| 164 | 1121 if( p < 0.0 ) |
| 1122 p = 0.0; | |
| 1123 pres_tissue_limit[ci] = p; | |
| 1124 | |
| 197 | 1125 // cycle through the 16 Bühlmann tissues for Helium |
| 167 | 1126 (pres_tissue+16)[ci] = 0.0; |
| 126 | 1127 } // for 0 to 16 |
| 116 | 1128 |
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1129 clear_deco_table(); |
| 126 | 1130 char_O_deco_status = 0; |
| 1131 char_O_nullzeit = 0; | |
| 168 | 1132 int_O_ascenttime = 0; |
| 126 | 1133 char_O_gradient_factor = 0; |
| 1134 char_O_relative_gradient_GF = 0; | |
| 197 | 1135 char_I_depth_last_deco = 0; // for compatibility with v.101pre_no_last_deco |
| 167 | 1136 } |
| 116 | 1137 |
| 167 | 1138 ////////////////////////////////////////////////////////////////////////////// |
| 1139 // calc_hauptroutine | |
| 1140 // | |
| 1141 // this is the major code in dive mode calculates: | |
| 116 | 1142 // the tissues, |
| 167 | 1143 // the bottom time, |
| 1144 // and simulates the ascend with all deco stops. | |
| 171 | 1145 // |
| 1146 // The deco_state sequence is : | |
| 1147 // 3 (at surface) | |
| 1148 // +---> 0 : calc nullzeit | |
| 1149 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 1150 // | +-> 1 : simulate up to 16min of stops. | |
| 1151 // | +------< not finished | |
| 1152 // +--------< finish | |
| 1153 // | |
| 167 | 1154 static void calc_hauptroutine(void) |
| 116 | 1155 { |
| 241 | 1156 static unsigned char backup_gas_used = 0; |
| 1157 static unsigned char backup_gas_depth = 0; | |
| 217 | 1158 static unsigned char backup_gas_delay = 0; |
| 186 | 1159 |
| 116 | 1160 calc_hauptroutine_data_input(); |
| 1161 | |
| 1162 if(!flag_in_divemode) | |
| 1163 { | |
| 1164 flag_in_divemode = 1; | |
| 1165 create_dbs_set_dbg_and_ndl20mtr(); | |
| 1166 } | |
| 1167 else | |
| 1168 check_pre_dbg(); | |
| 1169 | |
| 1170 calc_hauptroutine_update_tissues(); | |
| 1171 calc_gradient_factor(); | |
| 1172 | |
| 167 | 1173 // toggle between calculation for nullzeit (bottom time), |
| 1174 // deco stops | |
| 1175 // and more deco stops (continue) | |
| 1176 switch( char_O_deco_status ) | |
| 116 | 1177 { |
| 186 | 1178 case 3: //---- At surface: start a new dive ------------------------------ |
| 1179 clear_deco_table(); | |
| 1180 copy_deco_table(); | |
| 200 | 1181 int_O_ascenttime = 0; // Reset DTR. |
| 1182 char_O_nullzeit = 0; // Reset bottom time. | |
| 1183 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. | |
| 201 | 1184 |
| 217 | 1185 // Values that should be reset just once for the full real dive. |
| 1186 // This is used to record the lowest stop for the whole dive, | |
| 1187 // Including ACCROSS all simulated ascent. | |
| 1188 low_depth = 0; | |
| 1189 | |
| 1190 // Reset gas switch history. | |
| 241 | 1191 backup_gas_used = sim_gas_last_used = 0; |
| 1192 backup_gas_depth = sim_gas_last_depth = 0; | |
| 217 | 1193 backup_gas_delay = sim_gas_delay = 0; |
| 203 | 1194 sim_dive_mins = 0; |
| 1195 break; | |
| 186 | 1196 |
| 167 | 1197 case 0: //---- bottom time ----------------------------------------------- |
| 1198 calc_nullzeit(); | |
| 1199 check_ndl(); | |
| 186 | 1200 char_O_deco_status = 2; // calc ascent next time. |
| 1201 break; | |
| 1202 | |
| 1203 case 2: //---- Simulate ascent to first stop ----------------------------- | |
| 203 | 1204 // Check proposed gas at begin of ascent simulation |
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1205 sim_dive_mins = int_I_divemins; // Init current time. |
| 241 | 1206 |
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1207 gas_switch_find_current(); // Lookup for current gas & time. |
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1208 gas_switch_set(); // setup calc_ratio's |
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1209 |
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1210 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1211 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
| 203 | 1212 backup_gas_delay = sim_gas_delay; |
| 186 | 1213 |
| 1214 sim_ascent_to_first_stop(); | |
| 201 | 1215 |
| 1216 char_O_deco_status = 1; // Calc stops next time (deco or gas switch). | |
| 167 | 1217 break; |
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1218 |
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1219 case 1: //---- Simulate stops -------------------------------------------- |
| 167 | 1220 calc_hauptroutine_calc_deco(); |
| 186 | 1221 |
| 1222 // If simulation is finished, restore the GF low reference, so that | |
| 1223 // next ascent simulation is done from the current depth: | |
| 217 | 1224 if( char_O_deco_status == 0 ) |
| 186 | 1225 { |
| 241 | 1226 sim_gas_last_used = backup_gas_used; |
| 1227 sim_gas_last_depth = backup_gas_depth; | |
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1228 sim_gas_delay = backup_gas_delay; |
| 186 | 1229 } |
| 167 | 1230 break; |
| 116 | 1231 } |
| 167 | 1232 |
| 116 | 1233 check_post_dbg(); |
| 1234 } | |
| 1235 | |
| 167 | 1236 ////////////////////////////////////////////////////////////////////////////// |
| 1237 // calc_hauptroutine_data_input | |
| 1238 // | |
| 1239 // Reset all C-code dive parameters from their ASM-code values. | |
| 1240 // Detect gas change condition. | |
| 1241 // | |
| 116 | 1242 void calc_hauptroutine_data_input(void) |
| 1243 { | |
| 203 | 1244 overlay short int_temp; |
| 126 | 1245 |
| 197 | 1246 pres_respiration = int_I_pres_respiration * 0.001; |
| 1247 pres_surface = int_I_pres_surface * 0.001; | |
| 1248 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1249 He_ratio = char_I_He_ratio * 0.01; | |
| 1250 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
| 116 | 1251 |
| 126 | 1252 // ____________________________________________________ |
| 1253 // | |
| 1254 // _____________ G A S _ C H A N G E S ________________ | |
| 1255 // ____________________________________________________ | |
| 1256 | |
| 212 | 1257 // Keep a margin of 150mbar = 1.50m |
| 1258 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1259 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 126 | 1260 |
| 225 | 1261 deco_gas_change[0] = 0; |
| 1262 deco_gas_change[1] = 0; | |
| 1263 deco_gas_change[2] = 0; | |
| 1264 deco_gas_change[3] = 0; | |
| 1265 deco_gas_change[4] = 0; | |
| 116 | 1266 |
| 203 | 1267 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
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1268 if(char_I_deco_gas_change[0]) |
| 126 | 1269 { |
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1270 if( int_temp > 100 *(short)char_I_deco_gas_change[0] ) |
| 225 | 1271 deco_gas_change[0] = char_I_deco_gas_change[0]; |
| 126 | 1272 } |
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1273 if(char_I_deco_gas_change[1]) |
| 126 | 1274 { |
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1275 if( int_temp > 100 *(short)char_I_deco_gas_change[1] ) |
| 225 | 1276 deco_gas_change[1] = char_I_deco_gas_change[1]; |
| 126 | 1277 } |
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1278 if(char_I_deco_gas_change[2]) |
| 126 | 1279 { |
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1280 if( int_temp > 100 *(short)char_I_deco_gas_change[2] ) |
| 225 | 1281 deco_gas_change[2] = char_I_deco_gas_change[2]; |
| 126 | 1282 } |
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1283 if(char_I_deco_gas_change[3]) |
| 126 | 1284 { |
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1285 if( int_temp > 100 *(short)char_I_deco_gas_change[3] ) |
| 225 | 1286 deco_gas_change[3] = char_I_deco_gas_change[3]; |
| 126 | 1287 } |
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1288 if(char_I_deco_gas_change[4]) |
| 126 | 1289 { |
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1290 if( int_temp > 100 *(short)char_I_deco_gas_change[4] ) |
| 225 | 1291 deco_gas_change[4] = char_I_deco_gas_change[4]; |
| 126 | 1292 } |
| 116 | 1293 |
| 197 | 1294 const_ppO2 = char_I_const_ppO2 * 0.01; |
| 1295 deco_ppO2_change = char_I_deco_ppO2_change / 99.95 | |
| 1296 + pres_surface | |
| 1297 + float_deco_distance; | |
| 1298 deco_ppO2 = char_I_deco_ppO2 * 0.01; | |
| 1299 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1300 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1301 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1302 GF_high = char_I_GF_High_percentage * 0.01; | |
| 126 | 1303 GF_delta = GF_high - GF_low; |
| 116 | 1304 } |
| 1305 | |
| 167 | 1306 ////////////////////////////////////////////////////////////////////////////// |
| 171 | 1307 // |
| 1308 // | |
| 116 | 1309 void calc_hauptroutine_update_tissues(void) |
| 1310 { | |
| 197 | 1311 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
| 1312 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
| 1313 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
| 237 | 1314 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1315 |
| 1316 if (char_I_const_ppO2 == 0) // new in v.101 | |
| 167 | 1317 pres_diluent = pres_respiration; // new in v.101 |
| 186 | 1318 else |
| 1319 { | |
| 167 | 1320 pres_diluent = ((pres_respiration - const_ppO2)/(N2_ratio + He_ratio)); // new in v.101 |
| 186 | 1321 if (pres_diluent > pres_respiration) // new in v.101 |
| 1322 pres_diluent = pres_respiration; // new in v.101 | |
| 1323 } | |
| 200 | 1324 if (pres_diluent > ppWVapour) // new in v.101 |
| 116 | 1325 { |
| 236 | 1326 ppN2 = N2_ratio * (pres_diluent - ppWVapour); // changed in v.101 |
| 200 | 1327 ppHe = He_ratio * (pres_diluent - ppWVapour); // changed in v.101 |
| 116 | 1328 char_O_diluent = (char)(pres_diluent/pres_respiration*100.0); |
| 1329 } | |
| 167 | 1330 else // new in v.101 |
| 116 | 1331 { |
| 236 | 1332 ppN2 = 0.0; // new in v.101 |
| 200 | 1333 ppHe = 0.0; // new in v.101 |
| 116 | 1334 char_O_diluent = 0; |
| 1335 } | |
| 1336 | |
| 1337 if(!char_I_step_is_1min) | |
| 192 | 1338 calc_tissue(0); |
| 116 | 1339 else |
| 192 | 1340 calc_tissue(1); |
| 186 | 1341 |
| 192 | 1342 // Calc limit for surface, ie. GF_high. |
| 1343 calc_limit(GF_high); | |
| 186 | 1344 |
| 203 | 1345 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
| 1346 int_O_gtissue_press = (short)((pres_tissue[char_O_gtissue_no] + (pres_tissue+16)[char_O_gtissue_no]) * 1000); | |
| 192 | 1347 |
| 1348 // if guiding tissue can not be exposed to surface pressure immediately | |
| 1349 if( calc_lead_tissue_limit > pres_surface && char_O_deco_status == 0) | |
| 116 | 1350 { |
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1351 char_O_nullzeit = 0; // deco necessary |
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1352 char_O_deco_status = 2; // calculate ascent on next iteration. |
| 116 | 1353 } |
| 171 | 1354 } |
| 1355 | |
| 116 | 1356 |
| 167 | 1357 ////////////////////////////////////////////////////////////////////////////// |
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1358 // Compute stops. |
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1359 // |
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1360 // Note: because this can be very long, break on 16 iterations, and set state |
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1361 // to 0 when finished, or to 1 when needing to continue. |
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1362 // |
| 116 | 1363 void calc_hauptroutine_calc_deco(void) |
| 1364 { | |
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1365 overlay unsigned char loop; |
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1366 |
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1367 for(loop = 0; loop < 16; ++loop) |
| 116 | 1368 { |
| 241 | 1369 // Do not ascent while doing a gas switch ? |
| 203 | 1370 if( sim_gas_delay <= sim_dive_mins ) |
| 1371 { | |
| 241 | 1372 if( calc_nextdecodepth() ) |
| 1373 { | |
| 1374 if( temp_depth_limit == 0 ) | |
| 1375 goto Surface; | |
| 116 | 1376 |
| 241 | 1377 //---- We hit a stop at temp_depth_limit --------------------- |
| 1378 temp_deco = temp_depth_limit * 0.09985 // Convert to relative bar, | |
| 1379 + pres_surface; // To absolute. | |
| 1380 update_deco_table(); // Adds a one minute stops. | |
| 1381 } | |
| 1382 else | |
| 1383 { | |
| 1384 //---- No stop ----------------------------------------------- | |
| 1385 temp_deco -= 0.9985; // Ascend 10m, no wait. | |
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1386 |
| 241 | 1387 //---- Finish computations once surface is reached ----------- |
| 1388 if( temp_deco <= pres_surface ) | |
| 1389 { | |
| 1390 Surface: | |
| 1391 copy_deco_table(); | |
| 1392 calc_ascenttime(); | |
| 1393 char_O_deco_status = 0; // calc nullzeit next time. | |
| 1394 return; | |
| 1395 } | |
| 1396 } | |
| 212 | 1397 |
| 1398 } | |
| 1399 else | |
| 241 | 1400 update_deco_table(); // Just pass one minute. |
| 197 | 1401 |
| 241 | 1402 //---- Then update tissue -------------------------------------------- |
| 203 | 1403 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1404 gas_switch_set(); // Apply any simulated gas change, once validated. |
| 212 | 1405 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
| 192 | 1406 sim_tissue(1); // Simulate compartiments for 1 minute. |
| 116 | 1407 } |
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1408 |
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1409 // Surface not reached, need more stops... |
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1410 char_O_deco_status = 1; // calc more stops next time. |
| 116 | 1411 } |
| 1412 | |
| 167 | 1413 ////////////////////////////////////////////////////////////////////////////// |
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1414 // Simulation ascention to first deco stop. |
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1415 // |
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1416 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1417 // there is no need to break on more that 16 iterations |
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1418 // (or we are already in deep shit). |
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1419 // |
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1420 void sim_ascent_to_first_stop(void) |
| 116 | 1421 { |
| 171 | 1422 update_startvalues(); |
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1423 clear_deco_table(); |
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1424 |
| 200 | 1425 temp_deco = pres_respiration; // Starts from current real depth. |
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1426 |
| 212 | 1427 // Do we have a gas switch going on ? |
| 1428 if( sim_gas_delay > sim_dive_mins ) | |
| 1429 return; | |
| 1430 | |
| 241 | 1431 //---- Loop until first stop, gas switch, or surface is reached ---------- |
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1432 for(;;) |
| 116 | 1433 { |
| 241 | 1434 // Try ascending 1 full minute. |
| 1435 temp_deco -= 0.9985; // 1 min, at 10m/min. ~ 1bar. | |
| 203 | 1436 |
| 212 | 1437 // Compute sim_lead_tissue_limit at GF_low (deepest stop). |
| 1438 sim_limit(GF_low); | |
| 1439 | |
| 1440 // Did we reach deepest remaining stop ? | |
| 241 | 1441 if( temp_deco < sim_lead_tissue_limit ) |
| 212 | 1442 { |
| 241 | 1443 temp_deco += 0.9985; // Restore last correct depth, |
| 1444 break; // End fast ascent. | |
| 212 | 1445 } |
| 1446 | |
| 203 | 1447 // Did we reach surface ? |
| 1448 if( temp_deco <= pres_surface ) | |
| 1449 { | |
| 1450 temp_deco = pres_surface; // Yes: finished ! | |
| 1451 break; | |
| 1452 } | |
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1453 |
| 241 | 1454 // Check for gas change below new depth ? |
| 1455 temp_depth_limit = (temp_deco - pres_surface) / 0.09985; | |
| 1456 | |
| 1457 if( gas_switch_deepest() ) | |
| 1458 { | |
| 1459 temp_deco = temp_depth_limit * 0.09985 + pres_surface; | |
| 212 | 1460 break; |
| 241 | 1461 } |
| 171 | 1462 |
| 203 | 1463 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1464 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
| 203 | 1465 sim_tissue(1); // and update tissues for 1 min. |
| 1466 } | |
| 167 | 1467 } |
| 116 | 1468 |
| 167 | 1469 ////////////////////////////////////////////////////////////////////////////// |
| 1470 // calc_tissue | |
| 1471 // | |
| 116 | 1472 // optimized in v.101 |
| 167 | 1473 // |
| 184 | 1474 static void calc_tissue(PARAMETER unsigned char period) |
| 116 | 1475 { |
| 236 | 1476 assert( 0.00 <= ppN2 && ppN2 < 6.40 ); // 80% N2 at 70m |
| 1477 assert( 0.00 <= ppHe && ppHe < 18.9 ); // 90% He at 200m | |
| 1478 | |
| 126 | 1479 for (ci=0;ci<16;ci++) |
| 1480 { | |
| 184 | 1481 read_buhlmann_coefficients(period); // 2 sec or 1 min period. |
| 116 | 1482 |
| 126 | 1483 // N2 |
| 236 | 1484 temp_tissue = (ppN2 - pres_tissue[ci]) * var_N2_e; |
| 126 | 1485 temp_tissue_safety(); |
| 167 | 1486 pres_tissue[ci] += temp_tissue; |
| 165 | 1487 |
| 126 | 1488 // He |
| 200 | 1489 temp_tissue = (ppHe - (pres_tissue+16)[ci]) * var_He_e; |
| 126 | 1490 temp_tissue_safety(); |
| 167 | 1491 (pres_tissue+16)[ci] += temp_tissue; |
| 192 | 1492 } |
| 167 | 1493 } |
| 116 | 1494 |
| 167 | 1495 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1496 // calc_limit |
| 167 | 1497 // |
| 192 | 1498 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
| 167 | 1499 // |
| 192 | 1500 static void calc_limit(PARAMETER float GF_current) |
| 167 | 1501 { |
| 192 | 1502 char_O_gtissue_no = 255; |
| 1503 calc_lead_tissue_limit = 0.0; | |
| 1504 | |
| 1505 for (ci=0;ci<16;ci++) | |
| 1506 { | |
| 1507 overlay float p = pres_tissue[ci] + (pres_tissue+16)[ci]; | |
| 1508 | |
| 1509 read_buhlmann_coefficients(-1); // 2 sec or 1 min period. | |
| 1510 var_N2_a = (var_N2_a * pres_tissue[ci] + var_He_a * (pres_tissue+16)[ci]) / p; | |
| 1511 var_N2_b = (var_N2_b * pres_tissue[ci] + var_He_b * (pres_tissue+16)[ci]) / p; | |
| 116 | 1512 |
| 192 | 1513 // Apply the Eric Baker's varying gradient factor correction. |
| 1514 // Note: the correction factor depends both on GF and b, | |
| 1515 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1516 // so that can change who is the leading gas... | |
| 1517 // Note: Also depends of the GF. So the calcul is different for | |
| 1518 // GF_low, current GF, or GF_high... | |
| 1519 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1520 // hence what would happend at surface, | |
| 1521 // hence at GF_high. | |
| 1522 if( char_I_deco_model == 1 ) | |
| 1523 p = ( p - var_N2_a * GF_current) * var_N2_b | |
| 1524 / (GF_current + var_N2_b * (1.0 - GF_current)); | |
| 1525 else | |
| 1526 p = (p - var_N2_a) * var_N2_b; | |
| 1527 if( p < 0 ) p = 0; | |
| 1528 | |
| 1529 pres_tissue_limit[ci] = p; | |
| 1530 if( p > calc_lead_tissue_limit ) | |
| 1531 { | |
| 1532 char_O_gtissue_no = ci; | |
| 1533 calc_lead_tissue_limit = p; | |
| 1534 } | |
| 1535 } | |
| 197 | 1536 |
| 1537 assert( char_O_gtissue_no < 16 ); | |
| 1538 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); | |
| 167 | 1539 } |
| 1540 | |
| 1541 ////////////////////////////////////////////////////////////////////////////// | |
| 1542 // calc_nullzeit | |
| 1543 // | |
| 1544 // calculates the remaining bottom time | |
| 1545 // | |
| 1546 // unchanged in v.101 | |
| 1547 // | |
| 1548 static void calc_nullzeit(void) | |
| 1549 { | |
| 203 | 1550 overlay unsigned char loop; |
| 200 | 1551 update_startvalues(); |
| 167 | 1552 |
| 116 | 1553 char_O_nullzeit = 0; |
| 167 | 1554 for(loop = 1; loop <= 17; loop++) |
| 116 | 1555 { |
| 1556 backup_sim_pres_tissue(); | |
| 197 | 1557 sim_tissue(2); // 10 min. |
| 192 | 1558 sim_limit(GF_high); |
| 167 | 1559 |
| 192 | 1560 if( sim_lead_tissue_limit > pres_surface ) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately |
| 185 | 1561 { |
| 1562 restore_sim_pres_tissue(); | |
| 1563 break; | |
| 1564 } | |
| 1565 // Validate once we know its good. | |
| 1566 char_O_nullzeit += 10; | |
| 167 | 1567 } |
| 1568 | |
| 116 | 1569 if (char_O_nullzeit < 60) |
| 1570 { | |
| 167 | 1571 for(loop=1; loop <= 10; loop++) |
| 116 | 1572 { |
| 197 | 1573 sim_tissue(1); // 1 min |
| 192 | 1574 sim_limit(GF_high); |
| 1575 | |
| 1576 if( sim_lead_tissue_limit > pres_surface) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately | |
| 185 | 1577 break; |
| 1578 char_O_nullzeit++; | |
| 167 | 1579 } |
| 185 | 1580 } |
| 1581 } | |
| 116 | 1582 |
| 167 | 1583 ////////////////////////////////////////////////////////////////////////////// |
| 1584 // backup_sim_pres_tissue | |
| 1585 // | |
| 116 | 1586 void backup_sim_pres_tissue(void) |
| 1587 { | |
| 167 | 1588 overlay unsigned char x; |
| 1589 | |
| 1590 for(x = 0; x<32; x++) | |
| 126 | 1591 sim_pres_tissue_backup[x] = sim_pres_tissue[x]; |
| 167 | 1592 } |
| 116 | 1593 |
| 167 | 1594 ////////////////////////////////////////////////////////////////////////////// |
| 1595 // restore_sim_pres_tissue | |
| 1596 // | |
| 116 | 1597 void restore_sim_pres_tissue(void) |
| 1598 { | |
| 167 | 1599 overlay unsigned char x; |
| 1600 | |
| 1601 for(x = 0; x<32; x++) | |
| 126 | 1602 sim_pres_tissue[x] = sim_pres_tissue_backup[x]; |
| 167 | 1603 } |
| 116 | 1604 |
| 167 | 1605 ////////////////////////////////////////////////////////////////////////////// |
| 1606 // calc_ascenttime | |
| 1607 // | |
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1608 static void calc_ascenttime(void) |
| 116 | 1609 { |
| 126 | 1610 if (pres_respiration > pres_surface) |
| 1611 { | |
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1612 overlay unsigned char x; |
| 168 | 1613 |
| 192 | 1614 // + 0.7 to count 1 minute ascent time from 3 meter to surface |
| 1615 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
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1616 if (ascent < 0.0) |
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1617 ascent = 0.0; |
| 203 | 1618 int_O_ascenttime = (unsigned short)(ascent + 0.99); |
| 168 | 1619 |
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1620 for(x=0; x<32 && internal_deco_depth[x]; x++) |
| 203 | 1621 int_O_ascenttime += (unsigned short)internal_deco_time[x]; |
| 126 | 1622 } |
| 1623 else | |
| 168 | 1624 int_O_ascenttime = 0; |
| 167 | 1625 } |
| 116 | 1626 |
| 167 | 1627 ////////////////////////////////////////////////////////////////////////////// |
| 1628 // update_startvalues | |
| 1629 // | |
| 116 | 1630 // updated in v.102 |
| 167 | 1631 // |
| 116 | 1632 void update_startvalues(void) |
| 1633 { | |
| 167 | 1634 overlay unsigned char x; |
| 116 | 1635 |
| 201 | 1636 // Start ascent simulation with current tissue partial pressures. |
| 116 | 1637 for (x = 0;x<16;x++) |
| 1638 { | |
| 1639 sim_pres_tissue[x] = pres_tissue[x]; | |
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1640 (sim_pres_tissue+16)[x] = (pres_tissue+16)[x]; |
| 116 | 1641 } |
| 197 | 1642 |
| 201 | 1643 // No leading tissue (yet) for this ascent simulation. |
| 197 | 1644 sim_lead_tissue_limit = 0.0; |
| 1645 sim_lead_tissue_no = 255; | |
| 167 | 1646 } |
| 116 | 1647 |
| 167 | 1648 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1649 // sim_tissue |
| 167 | 1650 // |
| 116 | 1651 // optimized in v.101 |
| 167 | 1652 // |
| 1653 // Function very simular to calc_tissue, but: | |
| 1654 // + Use a 1min or 10min period. | |
| 1655 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 184 | 1656 static void sim_tissue(PARAMETER unsigned char period) |
| 116 | 1657 { |
| 236 | 1658 assert( 0.00 <= ppN2 && ppN2 < 6.40 ); // 80% N2 at 70m |
| 1659 assert( 0.00 <= ppHe && ppHe < 18.9 ); // 90% He at 200m | |
| 1660 | |
| 192 | 1661 for(ci=0; ci<16; ci++) |
| 126 | 1662 { |
| 184 | 1663 read_buhlmann_coefficients(period); // 1 or 10 minute(s) interval |
| 165 | 1664 |
| 126 | 1665 // N2 |
| 236 | 1666 temp_tissue = (ppN2 - sim_pres_tissue[ci]) * var_N2_e; |
| 126 | 1667 temp_tissue_safety(); |
| 167 | 1668 sim_pres_tissue[ci] += temp_tissue; |
| 126 | 1669 |
| 1670 // He | |
| 200 | 1671 temp_tissue = (ppHe - (sim_pres_tissue+16)[ci]) * var_He_e; |
| 126 | 1672 temp_tissue_safety(); |
| 167 | 1673 (sim_pres_tissue+16)[ci] += temp_tissue; |
| 192 | 1674 } |
| 167 | 1675 } |
| 116 | 1676 |
| 167 | 1677 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1678 // sim_limit() |
| 1679 // | |
| 1680 // New in v.111 | |
| 1681 // | |
| 1682 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1683 // different depth, because it depends on current gradient factor. | |
| 167 | 1684 // |
| 192 | 1685 static void sim_limit(PARAMETER float GF_current) |
| 116 | 1686 { |
| 212 | 1687 assert( 0.0 < GF_current && GF_current <= 1.0f); |
| 1688 | |
| 192 | 1689 sim_lead_tissue_limit = 0.0; |
| 212 | 1690 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
| 192 | 1691 |
| 1692 for(ci=0; ci<16; ci++) | |
| 1693 { | |
| 241 | 1694 overlay float N2 = sim_pres_tissue[ci]; |
| 1695 overlay float He = (sim_pres_tissue+16)[ci]; | |
| 1696 overlay float p = N2 + He; | |
| 192 | 1697 |
| 1698 read_buhlmann_coefficients(-1); | |
| 241 | 1699 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
| 1700 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 192 | 1701 |
| 1702 // Apply the Eric Baker's varying gradient factor correction. | |
| 1703 // Note: the correction factor depends both on GF and b, | |
| 1704 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1705 // so that can change who is the leading gas... | |
| 1706 // Note: Also depends of the GF_current... | |
| 1707 if( char_I_deco_model == 1 ) | |
| 1708 p = ( p - var_N2_a * GF_current) * var_N2_b | |
| 1709 / (GF_current + var_N2_b * (1.0 - GF_current)); | |
| 1710 else | |
| 1711 p = (p - var_N2_a) * var_N2_b; | |
| 237 | 1712 if( p < 0.0 ) p = 0.0; |
| 192 | 1713 |
| 241 | 1714 assert( 0.0 <= p && p <= 14.0 ); |
| 1715 | |
| 192 | 1716 sim_pres_tissue_limit[ci] = p; |
| 1717 if( p > sim_lead_tissue_limit ) | |
| 1718 { | |
| 1719 sim_lead_tissue_no = ci; | |
| 1720 sim_lead_tissue_limit = p; | |
| 1721 } | |
| 1722 } // for ci | |
| 197 | 1723 |
| 1724 assert( sim_lead_tissue_no < 16 ); | |
| 237 | 1725 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
| 167 | 1726 } |
| 116 | 1727 |
| 167 | 1728 ////////////////////////////////////////////////////////////////////////////// |
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1729 // clear_deco_table |
| 167 | 1730 // |
| 1731 // unchanged in v.101 | |
| 1732 // | |
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1733 static void clear_deco_table(void) |
| 116 | 1734 { |
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1735 overlay unsigned char x; |
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1736 |
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1737 for(x=0; x<32; ++x) |
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1738 { |
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1739 internal_deco_time [x] = 0; |
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1740 internal_deco_depth[x] = 0; |
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1741 } |
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1742 } |
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1743 |
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1744 ////////////////////////////////////////////////////////////////////////////// |
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1745 // update_deco_table |
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1746 // |
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1747 // Add 1 min to current stop. |
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1748 // |
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1749 // Inputs: |
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1750 // temp_depth_limit = stop's depth, in meters. |
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1751 // In/Out: |
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1752 // internal_deco_depth[] : depth (in meters) of each stops. |
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1753 // internal_deco_time [] : time (in minutes) of each stops. |
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1754 // |
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1755 static void update_deco_table() |
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1756 { |
| 192 | 1757 overlay unsigned char x; |
|
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1758 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1759 assert( temp_depth_limit > 0 ); // No stop at surface... |
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1760 |
| 192 | 1761 for(x=0; x<32; ++x) |
| 1762 { | |
| 212 | 1763 // Make sure deco-stops are recorded in order: |
| 1764 assert( !internal_deco_depth[x] || temp_depth_limit <= internal_deco_depth[x] ); | |
| 1765 | |
| 200 | 1766 if( internal_deco_depth[x] == temp_depth_limit ) |
| 192 | 1767 { |
| 1768 // Do not overflow (max 255') | |
| 1769 if( internal_deco_time[x] < 255 ) | |
| 1770 { | |
| 1771 internal_deco_time[x]++; | |
| 1772 return; | |
| 1773 } | |
| 1774 // But store extra in the next stop... | |
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1775 } |
| 192 | 1776 |
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1777 if( internal_deco_depth[x] == 0 ) |
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1778 { |
| 192 | 1779 internal_deco_depth[x] = temp_depth_limit; |
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1780 internal_deco_time[x] = 1; |
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1781 return; |
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1782 } |
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1783 } |
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1784 |
| 192 | 1785 // Can't store stops at more than 96m. |
| 1786 // Or stops at less that 3m too. | |
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1787 // Just do nothing with that... |
| 167 | 1788 } |
| 116 | 1789 |
| 167 | 1790 ////////////////////////////////////////////////////////////////////////////// |
| 1791 // calc_gradient_factor | |
| 1792 // | |
| 165 | 1793 // optimized in v.101 (var_N2_a) |
| 116 | 1794 // new code in v.102 |
| 167 | 1795 // |
| 1796 static void calc_gradient_factor(void) | |
| 116 | 1797 { |
| 197 | 1798 overlay float gf; |
| 237 | 1799 |
| 197 | 1800 assert( char_O_gtissue_no < 16 ); |
| 237 | 1801 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1802 |
| 116 | 1803 // tissue > respiration (entsaettigungsvorgang) |
| 1804 // gradient ist wieviel prozent an limit mit basis tissue | |
| 1805 // dh. 0% = respiration == tissue | |
| 1806 // dh. 100% = respiration == limit | |
| 197 | 1807 temp_tissue = pres_tissue[char_O_gtissue_no] + (pres_tissue+16)[char_O_gtissue_no]; |
| 1808 if( temp_tissue < pres_respiration ) | |
| 1809 gf = 0.0; | |
| 1810 else | |
| 1811 { | |
| 1812 gf = (temp_tissue - pres_respiration) | |
| 1813 / (temp_tissue - pres_tissue_limit[char_O_gtissue_no]) | |
| 1814 * 100.0; | |
| 1815 if( gf > 255.0 ) gf = 255.0; | |
| 1816 if( gf < 0.0 ) gf = 0.0; | |
| 1817 } | |
| 1818 char_O_gradient_factor = (unsigned char)gf; | |
| 116 | 1819 |
| 1820 if (char_I_deco_model == 1) // calculate relative gradient factor | |
| 1821 { | |
| 197 | 1822 overlay float rgf; |
| 1823 | |
| 1824 if( low_depth == 0 ) | |
| 1825 rgf = GF_high; | |
| 1826 else | |
| 1827 { | |
| 241 | 1828 overlay float temp1 = low_depth * 0.09985; |
| 197 | 1829 overlay float temp2 = pres_respiration - pres_surface; |
| 186 | 1830 |
| 197 | 1831 if (temp2 <= 0) |
| 1832 rgf = GF_high; | |
| 1833 else if (temp2 >= temp1) | |
| 1834 rgf = GF_low; | |
| 1835 else | |
| 1836 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 1837 } | |
| 186 | 1838 |
| 197 | 1839 rgf = gf / rgf; // gf is already in percent |
| 1840 if( rgf < 0.0 ) rgf = 0.0; | |
| 1841 if( rgf > 255.0 ) rgf = 255.0; | |
| 1842 char_O_relative_gradient_GF = (unsigned char)rgf; | |
| 116 | 1843 } // calc relative gradient factor |
| 1844 else | |
| 1845 { | |
| 186 | 1846 char_O_relative_gradient_GF = char_O_gradient_factor; |
| 116 | 1847 } |
| 167 | 1848 } |
| 116 | 1849 |
| 167 | 1850 ////////////////////////////////////////////////////////////////////////////// |
| 1851 // deco_calc_desaturation_time | |
| 1852 // | |
| 116 | 1853 // FIXED N2_ratio |
| 1854 // unchanged in v.101 | |
| 233 | 1855 // Inputs: int_I_pres_surface, ppWVapour, char_I_desaturation_multiplier |
| 1856 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] | |
| 167 | 1857 // |
| 116 | 1858 void deco_calc_desaturation_time(void) |
| 1859 { | |
| 203 | 1860 overlay unsigned short desat_time; // For a particular compartiment, in min. |
| 200 | 1861 overlay float temp1; |
| 197 | 1862 overlay float temp2; |
| 1863 overlay float temp3; | |
| 1864 overlay float temp4; | |
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1865 RESET_C_STACK |
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1866 |
| 233 | 1867 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 1868 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1869 | |
| 237 | 1870 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
| 233 | 1871 pres_surface = int_I_pres_surface * 0.001; |
| 236 | 1872 ppN2 = N2_ratio * (pres_surface - ppWVapour); |
| 126 | 1873 int_O_desaturation_time = 0; |
| 1874 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) | |
| 233 | 1875 |
| 126 | 1876 for (ci=0;ci<16;ci++) |
| 1877 { | |
| 200 | 1878 overlay float var_N2_halftime = buhlmann_ht[ci]; |
| 1879 overlay float var_He_halftime = (buhlmann_ht+16)[ci]; | |
| 116 | 1880 |
| 126 | 1881 // saturation_time (for flight) and N2_saturation in multiples of halftime |
| 1882 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1883 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1884 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and noFly calculations | |
| 1885 // N2 | |
| 236 | 1886 temp1 = 1.05 * ppN2; |
| 126 | 1887 temp1 = temp1 - pres_tissue[ci]; |
| 236 | 1888 temp2 = ppN2 - pres_tissue[ci]; |
| 126 | 1889 if (temp2 >= 0.0) |
| 1890 { | |
| 233 | 1891 temp1 = 0.0; |
| 1892 temp2 = 0.0; | |
| 126 | 1893 } |
| 1894 else | |
| 1895 temp1 = temp1 / temp2; | |
| 1896 if (temp1 > 0.0) | |
| 1897 { | |
| 1898 temp1 = log(1.0 - temp1); | |
| 1899 temp1 = temp1 / -0.6931; // temp1 is the multiples of half times necessary. | |
| 1900 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1901 // minus because log is negative | |
| 165 | 1902 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 | 1903 } |
| 1904 else | |
| 1905 { | |
| 233 | 1906 temp1 = 0.0; |
| 1907 temp2 = 0.0; | |
| 126 | 1908 } |
| 116 | 1909 |
| 126 | 1910 // He |
| 167 | 1911 temp3 = 0.1 - (pres_tissue+16)[ci]; |
| 126 | 1912 if (temp3 >= 0.0) |
| 1913 { | |
| 233 | 1914 temp3 = 0.0; |
| 1915 temp4 = 0.0; | |
| 126 | 1916 } |
| 1917 else | |
| 167 | 1918 temp3 = -1.0 * temp3 / (pres_tissue+16)[ci]; |
| 126 | 1919 if (temp3 > 0.0) |
| 1920 { | |
| 1921 temp3 = log(1.0 - temp3); | |
| 1922 temp3 = temp3 / -0.6931; // temp1 is the multiples of half times necessary. | |
| 1923 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1924 // minus because log is negative | |
| 165 | 1925 temp4 = var_He_halftime * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
| 126 | 1926 } |
| 1927 else | |
| 1928 { | |
| 233 | 1929 temp3 = 0.0; |
| 1930 temp4 = 0.0; | |
| 126 | 1931 } |
| 116 | 1932 |
| 126 | 1933 // saturation_time (for flight) |
| 1934 if (temp4 > temp2) | |
| 203 | 1935 desat_time = (unsigned short)temp4; |
| 126 | 1936 else |
| 203 | 1937 desat_time = (unsigned short)temp2; |
| 167 | 1938 if(desat_time > int_O_desaturation_time) |
| 1939 int_O_desaturation_time = desat_time; | |
| 116 | 1940 |
| 126 | 1941 // N2 saturation in multiples of halftime for display purposes |
| 1942 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1943 temp2 = temp2 + 80.0; // set center | |
| 1944 if (temp2 < 0.0) | |
| 1945 temp2 = 0.0; | |
| 1946 if (temp2 > 255.0) | |
| 1947 temp2 = 255.0; | |
| 1948 char_O_tissue_saturation[ci] = (char)temp2; | |
| 233 | 1949 |
| 126 | 1950 // He saturation in multiples of halftime for display purposes |
| 1951 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1952 temp4 = temp4 + 80.0; // set center | |
| 1953 if (temp4 < 0.0) | |
| 1954 temp4 = 0.0; | |
| 1955 if (temp4 > 255.0) | |
| 1956 temp4 = 255.0; | |
| 167 | 1957 (char_O_tissue_saturation+16)[ci] = (char)temp4; |
| 126 | 1958 } // for |
| 167 | 1959 } |
| 116 | 1960 |
| 167 | 1961 ////////////////////////////////////////////////////////////////////////////// |
| 1962 // calc_wo_deco_step_1_min | |
| 1963 // | |
| 116 | 1964 // FIXED N2 Ratio |
| 1965 // optimized in v.101 (...saturation_multiplier) | |
| 1966 // desaturation slowed down to 70,42% | |
| 167 | 1967 // |
| 1968 static void calc_wo_deco_step_1_min(void) | |
| 116 | 1969 { |
| 1970 if(flag_in_divemode) | |
| 1971 { | |
| 1972 flag_in_divemode = 0; | |
| 1973 set_dbg_end_of_dive(); | |
| 1974 } | |
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1975 |
| 126 | 1976 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
| 233 | 1977 pres_respiration = int_I_pres_respiration * 0.001; // assembler code uses different digit system |
| 1978 pres_surface = int_I_pres_surface * 0.001; // the b"uhlmann formula using pres_surface does not use the N2_ratio | |
| 236 | 1979 ppN2 = N2_ratio * (pres_respiration - ppWVapour); // ppWVapour is the extra pressure in the body |
| 200 | 1980 ppHe = 0.0; |
| 126 | 1981 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) |
| 197 | 1982 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 126 | 1983 |
| 192 | 1984 calc_tissue(1); // update the pressure in the 32 tissues in accordance with the new ambient pressure |
| 167 | 1985 |
|
169
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1986 clear_deco_table(); |
| 200 | 1987 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
| 126 | 1988 char_O_nullzeit = 0; |
| 168 | 1989 int_O_ascenttime = 0; |
| 126 | 1990 calc_gradient_factor(); |
| 167 | 1991 } |
| 126 | 1992 |
| 167 | 1993 ////////////////////////////////////////////////////////////////////////////// |
| 1994 ////////////////////////////////////////////////////////////////////////////// | |
| 1995 ////////////////////////////////// deco_hash ///////////////////////////////// | |
| 1996 ////////////////////////////////////////////////////////////////////////////// | |
| 1997 ////////////////////////////////////////////////////////////////////////////// | |
| 126 | 1998 |
| 184 | 1999 #ifndef CROSS_COMPILE |
| 116 | 2000 void deco_hash(void) |
| 2001 { | |
| 167 | 2002 overlay unsigned char md_i, md_j; // Loop index. |
| 2003 overlay unsigned char md_t; | |
| 2004 overlay unsigned char md_buffer[16]; | |
| 2005 overlay unsigned char md_temp; | |
| 203 | 2006 overlay unsigned short md_pointer; |
| 167 | 2007 |
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2008 RESET_C_STACK |
| 126 | 2009 |
| 2010 // init | |
| 164 | 2011 for(md_i=0;md_i<16;md_i++) |
| 126 | 2012 { |
| 2013 md_state[md_i] = 0; | |
| 164 | 2014 char_O_hash[md_i] = 0; |
| 126 | 2015 } // for md_i 16 |
| 116 | 2016 |
| 126 | 2017 _asm |
| 167 | 2018 movlw 0x01 // md_pi address. |
| 2019 movwf TBLPTRU,0 | |
| 2020 movlw 0x7E | |
| 2021 movwf TBLPTRH,0 | |
| 2022 movlw 0x00 | |
| 2023 movwf TBLPTRL,0 | |
| 126 | 2024 _endasm; |
| 165 | 2025 md_i = 0; |
| 2026 do { | |
| 126 | 2027 _asm |
| 2028 TBLRDPOSTINC | |
| 2029 movff TABLAT,md_temp | |
| 2030 _endasm | |
| 165 | 2031 md_pi_subst[md_i++] = md_temp; |
| 2032 } while( md_i != 0 ); | |
| 2033 | |
| 126 | 2034 _asm |
| 167 | 2035 movlw 0x00 |
| 2036 movwf TBLPTRU,0 | |
| 2037 movlw 0x00 | |
| 2038 movwf TBLPTRH,0 | |
| 2039 movlw 0x00 | |
| 2040 movwf TBLPTRL,0 | |
| 126 | 2041 _endasm |
| 167 | 2042 |
| 126 | 2043 // cycle buffers |
| 2044 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
| 2045 { | |
| 2046 md_t = 0; | |
| 2047 for (md_i=0;md_i<16;md_i++) | |
| 2048 { | |
| 2049 if(md_pointer == 9) | |
| 164 | 2050 md_temp = char_O_hash[md_i]; |
| 126 | 2051 else |
| 2052 { | |
| 2053 _asm | |
| 167 | 2054 TBLRDPOSTINC |
| 2055 movff TABLAT,md_temp | |
| 126 | 2056 _endasm |
| 2057 } // else | |
| 167 | 2058 |
| 2059 md_buffer[md_i] = md_temp; | |
| 186 | 2060 md_state[md_i+16] = md_temp; |
| 2061 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
| 126 | 2062 } // for md_i 16 |
| 2063 | |
| 2064 for (md_i=0;md_i<18;md_i++) | |
| 2065 { | |
| 2066 for (md_j=0;md_j<48;md_j++) | |
| 2067 { | |
| 167 | 2068 md_state[md_j] ^= md_pi_subst[md_t]; |
| 126 | 2069 md_t = md_state[md_j]; |
| 2070 } // for md_j 48 | |
| 2071 md_t = (unsigned char)(md_t+1); | |
| 2072 } // for md_i 18 | |
| 164 | 2073 md_t = char_O_hash[15]; |
| 126 | 2074 |
| 2075 for (md_i=0;md_i<16;md_i++) | |
| 2076 { | |
| 167 | 2077 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
| 164 | 2078 md_t = char_O_hash[md_i]; |
| 126 | 2079 } // for md_i 16 |
| 2080 } // for md_pointer | |
| 116 | 2081 } // void deco_hash(void) |
| 184 | 2082 #endif |
| 116 | 2083 |
| 167 | 2084 ////////////////////////////////////////////////////////////////////////////// |
| 2085 // deco_clear_CNS_fraction | |
| 2086 // | |
| 116 | 2087 // new in v.101 |
| 167 | 2088 // |
| 116 | 2089 void deco_clear_CNS_fraction(void) |
| 2090 { | |
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2091 RESET_C_STACK |
| 237 | 2092 |
| 126 | 2093 CNS_fraction = 0.0; |
| 2094 char_O_CNS_fraction = 0; | |
| 167 | 2095 } |
| 116 | 2096 |
| 167 | 2097 ////////////////////////////////////////////////////////////////////////////// |
| 2098 // deco_calc_CNS_fraction | |
| 2099 // | |
| 116 | 2100 // new in v.101 |
| 2101 // optimized in v.102 : with new variables char_I_actual_ppO2 and actual_ppO2 | |
| 167 | 2102 // |
| 116 | 2103 // Input: char_I_actual_ppO2 |
| 2104 // Output: char_O_CNS_fraction | |
| 2105 // Uses and Updates: CNS_fraction | |
| 2106 // Uses: acutal_ppO2 | |
| 167 | 2107 // |
| 116 | 2108 void deco_calc_CNS_fraction(void) |
| 2109 { | |
| 167 | 2110 overlay float actual_ppO2; |
| 126 | 2111 RESET_C_STACK |
| 167 | 2112 |
| 237 | 2113 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.5 ); |
| 2114 assert( char_I_actual_ppO2 > 15 ); | |
| 2115 | |
| 126 | 2116 actual_ppO2 = (float)char_I_actual_ppO2 / 100.0; |
| 116 | 2117 |
| 126 | 2118 if (char_I_actual_ppO2 < 50) |
| 2119 CNS_fraction = CNS_fraction;// no changes | |
| 2120 else if (char_I_actual_ppO2 < 60) | |
| 2121 CNS_fraction = 1/(-54000.0 * actual_ppO2 + 54000.0) + CNS_fraction; | |
| 2122 else if (char_I_actual_ppO2 < 70) | |
| 2123 CNS_fraction = 1/(-45000.0 * actual_ppO2 + 48600.0) + CNS_fraction; | |
| 2124 else if (char_I_actual_ppO2 < 80) | |
| 2125 CNS_fraction = 1/(-36000.0 * actual_ppO2 + 42300.0) + CNS_fraction; | |
| 2126 else if (char_I_actual_ppO2 < 90) | |
| 2127 CNS_fraction = 1/(-27000.0 * actual_ppO2 + 35100.0) + CNS_fraction; | |
| 2128 else if (char_I_actual_ppO2 < 110) | |
| 2129 CNS_fraction = 1/(-18000.0 * actual_ppO2 + 27000.0) + CNS_fraction; | |
| 2130 else if (char_I_actual_ppO2 < 150) | |
| 2131 CNS_fraction = 1/(-9000.0 * actual_ppO2 + 17100.0) + CNS_fraction; | |
| 2132 else if (char_I_actual_ppO2 < 160) | |
| 2133 CNS_fraction = 1/(-22500.0 * actual_ppO2 + 37350.0) + CNS_fraction; | |
| 2134 else if (char_I_actual_ppO2 < 165) | |
| 2135 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 | |
| 2136 else if (char_I_actual_ppO2 < 170) | |
| 2137 CNS_fraction = 0.00102 + CNS_fraction; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 | |
| 2138 else if (char_I_actual_ppO2 < 175) | |
| 2139 CNS_fraction = 0.00136 + CNS_fraction; | |
| 2140 else if (char_I_actual_ppO2 < 180) | |
| 2141 CNS_fraction = 0.00180 + CNS_fraction; | |
| 2142 else if (char_I_actual_ppO2 < 185) | |
| 2143 CNS_fraction = 0.00237 + CNS_fraction; | |
| 2144 else if (char_I_actual_ppO2 < 190) | |
| 2145 CNS_fraction = 0.00310 + CNS_fraction; | |
| 2146 else if (char_I_actual_ppO2 < 195) | |
| 2147 CNS_fraction = 0.00401 + CNS_fraction; | |
| 2148 else if (char_I_actual_ppO2 < 200) | |
| 2149 CNS_fraction = 0.00517 + CNS_fraction; | |
| 2150 else if (char_I_actual_ppO2 < 230) | |
| 2151 CNS_fraction = 0.0209 + CNS_fraction; | |
| 2152 else | |
| 2153 CNS_fraction = 0.0482 + CNS_fraction; // value for 2.5 | |
| 116 | 2154 |
| 126 | 2155 if (CNS_fraction > 2.5) |
| 2156 CNS_fraction = 2.5; | |
| 2157 if (CNS_fraction < 0.0) | |
| 2158 CNS_fraction = 0.0; | |
| 2159 | |
| 2160 char_O_CNS_fraction = (char)((CNS_fraction + 0.005)* 100.0); | |
| 167 | 2161 } |
| 116 | 2162 |
| 167 | 2163 ////////////////////////////////////////////////////////////////////////////// |
| 2164 // deco_calc_CNS_decrease_15min | |
| 2165 // | |
| 116 | 2166 // new in v.101 |
| 167 | 2167 // |
| 116 | 2168 // calculates the half time of 90 minutes in 6 steps of 15 min |
| 200 | 2169 // (Used in sleepmode, for low battery mode). |
| 167 | 2170 // |
| 116 | 2171 // Output: char_O_CNS_fraction |
| 2172 // Uses and Updates: CNS_fraction | |
| 167 | 2173 // |
| 116 | 2174 void deco_calc_CNS_decrease_15min(void) |
| 2175 { | |
| 237 | 2176 RESET_C_STACK |
| 2177 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.5 ); | |
| 2178 | |
| 126 | 2179 CNS_fraction = 0.890899 * CNS_fraction; |
| 167 | 2180 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); |
| 2181 } | |
| 116 | 2182 |
| 167 | 2183 ////////////////////////////////////////////////////////////////////////////// |
| 2184 // deco_calc_percentage | |
| 2185 // | |
| 116 | 2186 // new in v.101 |
| 167 | 2187 // |
| 116 | 2188 // calculates int_I_temp * char_I_temp / 100 |
| 2189 // output is int_I_temp | |
| 200 | 2190 // |
| 2191 // Used to compute NoFly remaining time. | |
|
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2192 // |
| 116 | 2193 void deco_calc_percentage(void) |
| 2194 { | |
|
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2195 RESET_C_STACK |
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2196 |
| 237 | 2197 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
| 2198 assert( 0 <= int_I_temp && int_I_temp < 2880 ); // Less than 48h... | |
| 2199 | |
|
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2200 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
| 237 | 2201 |
| 2202 assert( int_I_temp < 1440 ); // Less than 24h... | |
|
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2203 } |
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2204 |
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2205 |
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2206 ////////////////////////////////////////////////////////////////////////////// |
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2207 // deco_gas_volumes |
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2208 // |
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2209 // new in v.111 |
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2210 // |
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2211 // calculates volumes for each gas. |
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2212 // |
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2213 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
|
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2214 // Gas list. |
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2215 // char_I_first_gas is the bottom gas. |
|
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2216 // decoplan (char_O_deco_depth, char_O_deco_time). |
|
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2217 // CF#54 == TRUE if shallowest stop first. |
|
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2218 // CF#56 == bottom deci-liters/minutes (0.5 .. 50.0) |
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2219 // CF#57 == deco deci-liters/minutes (0.5 .. 50.0). |
| 224 | 2220 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
|
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2221 // |
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2222 void deco_gas_volumes(void) |
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2223 { |
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2224 overlay float volumes[5]; |
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2225 overlay float ascent_usage; |
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2226 overlay unsigned char i, deepest_first; |
| 241 | 2227 overlay unsigned char gas; |
|
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2228 RESET_C_STACK |
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2229 |
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2230 //---- initialize with bottom consumption -------------------------------- |
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2231 for(i=0; i<5; ++i) // Nothing yet... |
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2232 volumes[i] = 0.0; |
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2233 |
| 241 | 2234 assert(1 <= char_I_first_gas && char_I_first_gas <= 5); |
| 2235 gas = char_I_first_gas - 1; | |
| 2236 | |
| 2237 volumes[gas] | |
|
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2238 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. |
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2239 * char_I_bottom_time // in minutes. |
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2240 * read_custom_function(56) // In deci-liter/minutes. |
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2241 * 0.1; // deci-liters --> liters. |
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2242 |
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2243 //---- Ascent usage ------------------------------------------------------ |
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2244 |
|
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2245 deepest_first = read_custom_function(54) == 0; |
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2246 ascent_usage = read_custom_function(57) * 0.1; // In liter/minutes. |
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2247 |
| 224 | 2248 // Usage up to the first stop: |
| 2249 // - computed at MAX depth (easier, safer), | |
|
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2250 // - with an ascent speed of 10m/min. |
| 224 | 2251 // - with ascent litter / minutes. |
|
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2252 // - still using bottom gas: |
| 241 | 2253 volumes[gas] |
|
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2254 += (char_I_bottom_depth*0.1 + 1.0) // Depth -> bar |
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2255 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 // ascent time (min) |
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2256 * ascent_usage; // Consumption ( xxx / min @ 1 bar) |
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2257 |
|
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2258 for(i=0; i<32; ++i) |
|
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2259 { |
| 241 | 2260 overlay unsigned char j; |
|
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2261 overlay unsigned char depth, time, ascent; |
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2262 |
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2263 // Manage stops in reverse order (CF#54) |
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2264 if( deepest_first ) |
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2265 { |
| 241 | 2266 time = char_O_deco_time[i]; |
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2267 if( time == 0 ) break; // End of table: done. |
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2268 |
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2269 ascent = depth = char_O_deco_depth[i]; |
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2270 if( i < 31 ) |
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2271 ascent -= char_O_deco_depth[i+1]; |
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2272 } |
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2273 else |
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2274 { |
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2275 time = char_O_deco_time[31-i]; |
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2276 if( time == 0 ) continue; // not yet: still searh table. |
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2277 |
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2278 ascent = depth = char_O_deco_depth[31-i]; |
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2279 if( i < 31 ) |
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2280 ascent -= char_O_deco_depth[30-i]; |
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2281 } |
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2282 |
|
222
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2283 // Gas switch depth ? |
| 241 | 2284 for(j=0; j<5; ++j) |
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2285 { |
|
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2286 if( depth <= char_I_deco_gas_change[j] ) |
| 241 | 2287 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
| 224 | 2288 gas = j; |
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2289 } |
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2290 |
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2291 // usage during stop: |
| 224 | 2292 // Note: because first gas is not in there, increment gas+1 |
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2293 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
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2294 * time // in minutes. |
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2295 * ascent_usage // in xxx / min @ 1bar. |
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2296 // Plus usage during ascent to the next stop, at 10m/min. |
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2297 + (depth*0.1 + 1.0) |
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2298 * ascent*0.1 // meter --> min |
| 225 | 2299 * ascent_usage; |
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2300 } |
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2301 |
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2302 //---- convert results for the ASM interface ----------------------------- |
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2303 for(i=0; i<5; ++i) |
| 224 | 2304 if( volumes[i] > 6553.4 ) |
| 2305 int_O_gas_volumes[i] = 65535; | |
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2306 else |
| 224 | 2307 int_O_gas_volumes[i] = (unsigned short)(volumes[i]*10.0 + 0.5); |
| 116 | 2308 } |
| 2309 | |
| 167 | 2310 ////////////////////////////////////////////////////////////////////////////// |
| 2311 | |
| 116 | 2312 void deco_push_tissues_to_vault(void) |
| 2313 { | |
| 167 | 2314 overlay unsigned char x; |
|
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2315 RESET_C_STACK |
| 167 | 2316 |
| 116 | 2317 cns_vault = CNS_fraction; |
| 167 | 2318 for (x=0;x<32;x++) |
| 2319 pres_tissue_vault[x] = pres_tissue[x]; | |
| 116 | 2320 } |
| 167 | 2321 |
| 116 | 2322 void deco_pull_tissues_from_vault(void) |
| 2323 { | |
| 167 | 2324 overlay unsigned char x; |
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2325 RESET_C_STACK |
| 167 | 2326 |
| 116 | 2327 CNS_fraction = cns_vault; |
| 167 | 2328 for (x=0;x<32;x++) |
| 2329 pres_tissue[x] = pres_tissue_vault[x]; | |
| 116 | 2330 } |
| 2331 | |
| 167 | 2332 ////////////////////////////////////////////////////////////////////////////// |
| 2333 // | |
| 184 | 2334 #ifndef CROSS_COMPILE |
| 2335 void main() {} | |
| 2336 #endif |