Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 259:cb95722a81a1
1.84beta release - 1.85beta start
| author | heinrichsweikamp |
|---|---|
| date | Sun, 10 Apr 2011 15:22:34 +0200 |
| parents | abbf9a2c2c48 |
| children | bde83cac971f |
| 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. |
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74 // 2011/04/10: [jDG] Use timer TMR3 to limit loops in calc_hauptroutine_calc_deco() |
| 116 | 75 // |
| 167 | 76 // TODO: |
| 77 // + Allow to abort MD2 calculation (have to restart next time). | |
| 78 // | |
| 79 // Literature: | |
| 200 | 80 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
| 116 | 81 // 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 |
| 82 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
| 83 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
| 84 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
| 85 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
| 167 | 86 // |
| 87 // | |
| 116 | 88 |
| 89 // ********************* | |
| 90 // ** I N C L U D E S ** | |
| 91 // ********************* | |
| 92 #include <math.h> | |
| 167 | 93 |
| 192 | 94 // *********************************************** |
| 95 // ** V A R I A B L E S D E F I N I T I O N S ** | |
| 96 // *********************************************** | |
| 97 | |
| 98 #include "p2_definitions.h" | |
| 99 #include "shared_definitions.h" | |
| 100 | |
| 200 | 101 // Water vapour partial pressure in the lumb. |
| 233 | 102 #define ppWVapour 0.0627 |
| 200 | 103 |
| 167 | 104 // ************************* |
| 105 // ** P R O T O T Y P E S ** | |
| 106 // ************************* | |
| 107 | |
| 108 static void calc_hauptroutine(void); | |
| 109 static void calc_nullzeit(void); | |
| 110 | |
| 192 | 111 static void calc_tissue(PARAMETER unsigned char period); |
| 258 | 112 static void calc_limit(void); |
| 192 | 113 |
| 167 | 114 static void clear_tissue(void); |
| 115 static void calc_ascenttime(void); | |
| 116 static void update_startvalues(void); | |
|
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117 static void clear_deco_table(void); |
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118 static void update_deco_table(void); |
| 192 | 119 |
| 120 static void backup_sim_pres_tissue(void); | |
| 121 static void restore_sim_pres_tissue(void); | |
| 122 static void sim_tissue(PARAMETER unsigned char period); | |
| 123 static void sim_limit(PARAMETER float GF_current); | |
| 167 | 124 static void calc_gradient_factor(void); |
| 125 static void calc_wo_deco_step_1_min(void); | |
| 126 | |
| 127 static void calc_hauptroutine_data_input(void); | |
| 128 static void calc_hauptroutine_update_tissues(void); | |
| 129 static void calc_hauptroutine_calc_deco(void); | |
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130 static void sim_ascent_to_first_stop(void); |
| 167 | 131 |
| 241 | 132 static unsigned char gas_switch_deepest(void); |
| 133 static void gas_switch_set(void); | |
| 217 | 134 |
| 241 | 135 static unsigned char calc_nextdecodepth(void); |
| 116 | 136 |
| 200 | 137 //---- Bank 4 parameters ----------------------------------------------------- |
| 163 | 138 #pragma udata bank4=0x400 |
| 116 | 139 |
| 140 static float temp_limit; | |
| 141 static float GF_low; | |
| 142 static float GF_high; | |
| 143 static float GF_delta; | |
| 192 | 144 static unsigned char low_depth; // Depth of deepest stop |
| 145 static float locked_GF_step; // GF_delta / low_depth | |
| 146 | |
| 147 static unsigned char temp_depth_limit; | |
| 171 | 148 |
| 192 | 149 // Simulation context: used to predict ascent. |
| 150 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 151 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 116 | 152 |
| 192 | 153 // Real context: what we are doing now. |
| 154 static float calc_lead_tissue_limit; // | |
| 116 | 155 |
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156 static unsigned char internal_deco_time[32]; |
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157 static unsigned char internal_deco_depth[32]; |
| 116 | 158 |
| 159 static float cns_vault; | |
| 160 static float pres_tissue_vault[32]; | |
| 161 | |
| 163 | 162 //---- Bank 5 parameters ----------------------------------------------------- |
| 163 #pragma udata bank5=0x500 | |
| 164 | |
| 167 | 165 static unsigned char ci; |
| 116 | 166 static float pres_respiration; |
| 167 static float pres_surface; | |
| 168 static float temp_deco; | |
| 236 | 169 static float ppN2; |
| 200 | 170 static float ppHe; |
| 116 | 171 static float temp_tissue; |
| 200 | 172 static float N2_ratio; // Breathed gas nitrogen ratio. |
| 173 static float He_ratio; // Breathed gas helium ratio. | |
| 174 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
| 175 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
| 176 static float var_He_a; // Bühlmann a, for current He tissue. | |
| 177 static float var_He_b; // Bühlmann b, for current He tissue. | |
| 178 static float var_N2_e; // Exposition, for current N2 tissue. | |
| 179 static float var_He_e; // Exposition, for current He tissue. | |
| 116 | 180 |
| 164 | 181 static float pres_diluent; // new in v.101 |
| 182 static float const_ppO2; // new in v.101 | |
| 183 static float deco_ppO2_change; // new in v.101 | |
| 184 static float deco_ppO2; // new in v.101 | |
| 116 | 185 |
| 241 | 186 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
| 187 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
| 203 | 188 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
| 189 static unsigned short sim_dive_mins; // Simulated dive time. | |
| 200 | 190 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
| 191 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
| 192 static float CNS_fraction; // new in v.101 | |
| 193 static float float_saturation_multiplier; // new in v.101 | |
| 194 static float float_desaturation_multiplier; // new in v.101 | |
| 167 | 195 static float float_deco_distance; // new in v.101 |
| 196 static char flag_in_divemode; // new in v.108 | |
| 197 | |
| 225 | 198 static unsigned char deco_gas_change[5]; // new in v.109 |
| 167 | 199 |
| 163 | 200 //---- Bank 6 parameters ----------------------------------------------------- |
| 201 #pragma udata bank6=0x600 | |
| 116 | 202 |
| 197 | 203 float pres_tissue[32]; |
| 116 | 204 |
| 163 | 205 //---- Bank 7 parameters ----------------------------------------------------- |
| 206 #pragma udata bank7=0x700 | |
| 207 | |
| 197 | 208 float sim_pres_tissue[32]; // 32 floats = 128 bytes. |
| 116 | 209 static float sim_pres_tissue_backup[32]; |
| 210 | |
| 163 | 211 //---- Bank 8 parameters ----------------------------------------------------- |
| 116 | 212 #pragma udata bank8=0x800 |
| 163 | 213 |
| 116 | 214 static char md_pi_subst[256]; |
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215 #define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
| 116 | 216 |
| 163 | 217 //---- Bank 9 parameters ----------------------------------------------------- |
| 167 | 218 #pragma udata bank9=0x900 |
| 116 | 219 |
| 163 | 220 static char md_state[48]; // DONT MOVE !! // has to be at the beginning of bank 9 for the asm code!!! |
| 116 | 221 |
| 164 | 222 // internal, dbg: |
| 167 | 223 static unsigned char DBG_char_I_deco_model; // new in v.108. |
| 164 | 224 static unsigned char DBG_char_I_depth_last_deco; // new in v.108 |
| 212 | 225 static unsigned char DBG_deco_gas_change; // new in v.108 |
| 224 | 226 static unsigned char DBG_deco_N2_ratio; // new in v.108 |
| 227 static unsigned char DBG_deco_He_ratio; // new in v.108 | |
| 164 | 228 static float DBG_pres_surface; // new in v.108 |
| 229 static float DBG_GF_low; // new in v.108 | |
| 230 static float DBG_GF_high; // new in v.108 | |
| 231 static float DBG_const_ppO2; // new in v.108 | |
| 232 static float DBG_deco_ppO2_change; // new in v.108 | |
| 233 static float DBG_deco_ppO2; // new in v.108 | |
| 234 static float DBG_float_saturation_multiplier; // new in v.108 | |
| 235 static float DBG_float_desaturation_multiplier; // new in v.108 | |
| 236 static float DBG_float_deco_distance; // new in v.108 | |
| 237 static float DBG_N2_ratio; // new in v.108 | |
| 238 static float DBG_He_ratio; // new in v.108 | |
| 239 | |
| 167 | 240 ////////////////////////////////////////////////////////////////////////////// |
| 241 ////////////////////////////////////////////////////////////////////////////// | |
| 242 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 243 ////////////////////////////////////////////////////////////////////////////// | |
| 244 ////////////////////////////////////////////////////////////////////////////// | |
| 245 // | |
| 246 // End of PROM code is 17F00, So push tables on PROM top... | |
| 247 // | |
| 248 #pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. | |
| 249 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) | |
| 116 | 250 |
| 167 | 251 // Magic table to compute the MD2 HASH |
| 252 // | |
| 253 #pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... | |
| 203 | 254 rom const rom unsigned short md_pi[] = |
| 116 | 255 { |
| 256 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 | |
| 257 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA | |
| 258 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 | |
| 259 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A | |
| 260 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 | |
| 261 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 | |
| 262 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 | |
| 263 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 | |
| 264 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 | |
| 265 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F | |
| 266 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 | |
| 267 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 | |
| 268 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A | |
| 269 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 | |
| 270 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A | |
| 271 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 | |
| 272 }; | |
| 273 | |
| 167 | 274 ////////////////////////////////////////////////////////////////////////////// |
| 275 ////////////////////////////////////////////////////////////////////////////// | |
| 276 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 277 ////////////////////////////////////////////////////////////////////////////// | |
| 278 ////////////////////////////////////////////////////////////////////////////// | |
| 279 // | |
| 116 | 280 // all new in v.102 |
| 281 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 282 | |
| 283 #pragma code p2_deco = 0x0C000 | |
| 284 | |
| 167 | 285 ////////////////////////////////////////////////////////////////////////////// |
| 286 // DBS - debug on start of dive | |
| 287 // | |
| 288 static void create_dbs_set_dbg_and_ndl20mtr(void) | |
| 116 | 289 { |
| 167 | 290 overlay char i; // Local loop index. |
| 291 | |
| 292 //---- Reset DEBUG bit fields -------------------------------------------- | |
| 116 | 293 int_O_DBS_bitfield = 0; |
| 294 int_O_DBS2_bitfield = 0; | |
| 295 if(int_O_DBG_pre_bitfield & DBG_RUN) | |
| 296 int_O_DBG_pre_bitfield = DBG_RESTART; | |
| 297 else | |
| 298 int_O_DBG_pre_bitfield = DBG_RUN; | |
| 299 int_O_DBG_post_bitfield = 0; | |
| 167 | 300 |
| 301 //---- Set 20meters ND limit --------------------------------------------- | |
| 116 | 302 char_O_NDL_at_20mtr = 255; |
| 303 | |
| 167 | 304 //---- Copy all dive parameters ------------------------------------------ |
| 116 | 305 DBG_N2_ratio = N2_ratio; |
| 306 DBG_He_ratio = He_ratio; | |
| 307 DBG_char_I_deco_model = char_I_deco_model; | |
| 308 DBG_char_I_depth_last_deco = char_I_depth_last_deco; | |
| 309 DBG_pres_surface = pres_surface; | |
| 310 DBG_GF_low = GF_low; | |
| 311 DBG_GF_high = GF_high; | |
| 312 DBG_const_ppO2 = const_ppO2; | |
| 313 DBG_deco_ppO2_change = deco_ppO2_change; | |
| 314 DBG_deco_ppO2 = deco_ppO2; | |
| 224 | 315 DBG_deco_N2_ratio = char_I_deco_N2_ratio[0]; |
| 316 DBG_deco_He_ratio = char_I_deco_He_ratio[0]; | |
| 225 | 317 DBG_deco_gas_change = deco_gas_change[0]; |
| 116 | 318 DBG_float_saturation_multiplier = float_saturation_multiplier; |
| 319 DBG_float_desaturation_multiplier = float_desaturation_multiplier; | |
| 320 DBG_float_deco_distance = float_deco_distance; | |
| 321 | |
| 167 | 322 //---- Setup some error (?) conditions ----------------------------------- |
| 116 | 323 if(char_I_deco_model) |
| 324 int_O_DBS_bitfield |= DBS_mode; | |
| 325 if(const_ppO2) | |
| 326 int_O_DBS_bitfield |= DBS_ppO2; | |
| 167 | 327 for(i = 16; i < 32; i++) |
| 328 if(pres_tissue[i]) | |
| 116 | 329 int_O_DBS_bitfield |= DBS_HE_sat; |
| 330 if(deco_ppO2_change) | |
| 331 int_O_DBS_bitfield |= DBS_ppO2chg; | |
| 332 if(float_saturation_multiplier < 0.99) | |
| 333 int_O_DBS_bitfield |= DBS_SAT2l; | |
| 334 if(float_saturation_multiplier > 1.3) | |
| 335 int_O_DBS_bitfield |= DBS_SAT2h; | |
| 336 if(GF_low < 0.19) | |
| 337 int_O_DBS_bitfield |= DBS_GFLOW2l; | |
| 338 if(GF_low > 1.01) | |
| 339 int_O_DBS_bitfield |= DBS_GFLOW2h; | |
| 340 if(GF_high < 0.6) | |
| 341 int_O_DBS_bitfield |= DBS_GFHGH2l; | |
| 342 if(GF_high > 1.01) | |
| 343 int_O_DBS_bitfield |= DBS_GFHGH2h; | |
| 344 if((N2_ratio + He_ratio) > 0.95) | |
| 345 int_O_DBS_bitfield |= DBS_GASO22l; | |
| 346 if((N2_ratio + He_ratio) < 0.05) | |
| 347 int_O_DBS_bitfield |= DBS_GASO22h; | |
| 348 if(float_deco_distance > 0.25) | |
| 349 int_O_DBS_bitfield |= DBS_DIST2h; | |
| 350 if(char_I_depth_last_deco > 8) | |
| 351 int_O_DBS_bitfield |= DBS_LAST2h; | |
| 224 | 352 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) > 95)) |
| 116 | 353 int_O_DBS_bitfield |= DBS_DECOO2l; |
| 224 | 354 if(DBG_deco_gas_change && ((char_I_deco_N2_ratio[0] + char_I_deco_He_ratio[0]) < 5)) |
| 116 | 355 int_O_DBS_bitfield |= DBS_DECOO2h; |
| 356 if(pres_respiration > 3.0) | |
| 357 int_O_DBS2_bitfield |= DBS2_PRES2h; | |
| 358 if(pres_surface - pres_respiration > 0.2) | |
| 359 int_O_DBS2_bitfield |= DBS2_PRES2l; | |
| 360 if(pres_surface < 0.75) | |
| 361 int_O_DBS2_bitfield |= DBS2_SURF2l; | |
| 362 if(pres_surface > 1.11) | |
| 363 int_O_DBS2_bitfield |= DBS2_SURF2h; | |
| 364 if(float_desaturation_multiplier < 0.70) | |
| 365 int_O_DBS2_bitfield |= DBS2_DESAT2l; | |
| 366 if(float_desaturation_multiplier > 1.01) | |
| 367 int_O_DBS2_bitfield |= DBS2_DESAT2h; | |
| 368 if(GF_low > GF_high) | |
| 369 int_O_DBS2_bitfield |= DBS2_GFDneg; | |
| 370 } | |
| 371 | |
| 167 | 372 ////////////////////////////////////////////////////////////////////////////// |
| 373 // DBG - set DBG to end_of_dive | |
| 374 // | |
| 375 static void set_dbg_end_of_dive(void) | |
| 116 | 376 { |
| 377 int_O_DBG_pre_bitfield &= (~DBG_RUN); | |
| 378 int_O_DBG_post_bitfield &= (~DBG_RUN); | |
| 379 } | |
| 380 | |
| 167 | 381 ////////////////////////////////////////////////////////////////////////////// |
| 382 // DBG - NDL at first 20 m. hit | |
| 383 // | |
| 384 static void check_ndl(void) | |
| 116 | 385 { |
| 167 | 386 if( char_O_NDL_at_20mtr == 255 // Still in NDL mode ? |
| 387 && int_I_pres_respiration > 3000 // And we hit the 20m limit ? | |
| 388 ) | |
| 116 | 389 { |
| 167 | 390 char_O_NDL_at_20mtr = char_O_nullzeit; // change to max bottom time. |
| 391 if( char_O_NDL_at_20mtr == 255) // and avoid confusion. | |
| 184 | 392 char_O_NDL_at_20mtr = 254; |
| 116 | 393 } |
| 394 } | |
| 395 | |
| 167 | 396 ////////////////////////////////////////////////////////////////////////////// |
| 397 // DBG - multi main during dive | |
| 398 // | |
| 184 | 399 static void check_dbg(PARAMETER char is_post_check) |
| 116 | 400 { |
| 203 | 401 overlay unsigned short temp_DBS = 0; |
| 200 | 402 overlay unsigned char i; // Local loop index. |
| 167 | 403 |
| 116 | 404 if( (DBG_N2_ratio != N2_ratio) || (DBG_He_ratio != He_ratio) ) |
| 405 temp_DBS |= DBG_c_gas; | |
| 406 if(DBG_const_ppO2 != const_ppO2) | |
| 407 temp_DBS |= DBG_c_ppO2; | |
| 167 | 408 if( DBG_float_saturation_multiplier != float_saturation_multiplier |
| 409 || DBG_float_desaturation_multiplier != float_desaturation_multiplier | |
| 410 ) | |
| 116 | 411 temp_DBS |= DBG_CdeSAT; |
| 412 if(DBG_char_I_deco_model != char_I_deco_model) | |
| 413 temp_DBS |= DBG_C_MODE; | |
| 414 if(DBG_pres_surface != pres_surface) | |
| 415 temp_DBS |= DBG_C_SURF; | |
| 167 | 416 |
| 417 if( !DBS_HE_sat && !He_ratio) | |
| 418 for(i = 16; i < 32; i++) | |
| 419 if(pres_tissue[i]) | |
| 116 | 420 temp_DBS |= DBG_HEwoHE; |
| 167 | 421 |
| 116 | 422 if(DBG_deco_ppO2 != deco_ppO2) |
| 423 temp_DBS |= DBG_C_DPPO2; | |
| 167 | 424 |
| 225 | 425 if( DBG_deco_gas_change != deco_gas_change[0] |
| 224 | 426 || DBG_deco_N2_ratio != char_I_deco_N2_ratio[0] |
| 427 || DBG_deco_He_ratio != char_I_deco_He_ratio[0] ) | |
| 116 | 428 temp_DBS |= DBG_C_DGAS; |
| 167 | 429 |
| 116 | 430 if(DBG_float_deco_distance != float_deco_distance) |
| 431 temp_DBS |= DBG_C_DIST; | |
| 432 if(DBG_char_I_depth_last_deco != char_I_depth_last_deco) | |
| 433 temp_DBS |= DBG_C_LAST; | |
| 167 | 434 if( DBG_GF_low != GF_low |
| 435 || DBG_GF_high != GF_high ) | |
| 116 | 436 temp_DBS |= DBG_C_GF; |
| 437 if(pres_respiration > 13.0) | |
| 438 temp_DBS |= DBG_PHIGH; | |
| 439 if(pres_surface - pres_respiration > 0.2) | |
| 440 temp_DBS |= DBG_PLOW; | |
| 441 if(is_post_check) | |
| 442 int_O_DBG_post_bitfield |= temp_DBS; | |
| 443 else | |
| 444 int_O_DBG_pre_bitfield |= temp_DBS; | |
| 445 } | |
| 446 | |
| 167 | 447 ////////////////////////////////////////////////////////////////////////////// |
| 448 // DBG - prior to calc. of dive | |
| 449 // | |
| 450 static void check_pre_dbg(void) | |
| 116 | 451 { |
| 452 check_dbg(0); | |
| 453 } | |
| 454 | |
| 167 | 455 ////////////////////////////////////////////////////////////////////////////// |
| 456 // DBG - after decocalc of dive | |
| 457 // | |
| 458 static void check_post_dbg(void) | |
| 116 | 459 { |
| 460 check_dbg(1); | |
| 461 } | |
| 462 | |
| 165 | 463 ////////////////////////////////////////////////////////////////////////////// |
| 167 | 464 ////////////////////////////////////////////////////////////////////////////// |
| 465 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 466 ////////////////////////////////////////////////////////////////////////////// | |
| 467 ////////////////////////////////////////////////////////////////////////////// | |
| 468 | |
| 235 | 469 ////////////////////////////////////////////////////////////////////////////// |
|
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470 // Bump to blue-screen when an assert is wrong |
| 235 | 471 #ifdef __DEBUG |
| 472 void assert_failed(PARAMETER short int line) | |
| 473 { | |
| 474 extern void PLED_resetdebugger(void); | |
| 475 extern unsigned short temp10; | |
| 476 | |
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477 temp10 = line; // Show source line number as stack depth. |
| 235 | 478 PLED_resetdebugger(); |
| 479 } | |
| 480 #endif | |
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481 |
| 235 | 482 ////////////////////////////////////////////////////////////////////////////// |
| 483 // When calling C code from ASM context, the data stack pointer and | |
| 484 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
| 485 | |
| 486 #ifdef CROSS_COMPILE | |
| 487 # define RESET_C_STACK | |
| 488 #else | |
| 489 # ifdef __DEBUG | |
| 490 # define RESET_C_STACK fillDataStack(); | |
| 491 void fillDataStack(void) | |
| 492 { | |
| 493 _asm | |
| 494 LFSR 1,C_STACK | |
| 495 MOVLW 0xCC | |
| 496 loop: MOVWF POSTINC1,0 | |
| 497 TSTFSZ FSR1L,0 | |
| 498 BRA loop | |
| 499 | |
| 500 LFSR 1,C_STACK | |
| 501 LFSR 2,C_STACK | |
| 502 _endasm | |
| 503 } | |
| 504 # else | |
| 505 # define RESET_C_STACK \ | |
| 506 _asm \ | |
| 507 LFSR 1, C_STACK \ | |
| 508 LFSR 2, C_STACK \ | |
| 509 _endasm | |
| 510 # endif | |
| 511 #endif | |
| 512 | |
| 513 ////////////////////////////////////////////////////////////////////////////// | |
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514 // Read CF values from the C code. |
| 235 | 515 |
| 203 | 516 static short read_custom_function(PARAMETER unsigned char cf) |
| 167 | 517 { |
| 184 | 518 #ifdef CROSS_COMPILE |
| 519 extern unsigned short custom_functions[]; | |
| 520 return custom_functions[cf]; | |
| 521 #else | |
| 167 | 522 extern unsigned char hi, lo; |
| 523 extern void getcustom15(); | |
| 524 _asm | |
| 525 movff cf,WREG | |
| 526 call getcustom15,0 | |
| 527 movff lo,PRODL | |
| 528 movff hi,PRODH | |
| 529 _endasm | |
| 184 | 530 #endif |
| 167 | 531 } |
| 532 | |
| 533 ////////////////////////////////////////////////////////////////////////////// | |
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534 // Fast subroutine to read RTC timer 3. |
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535 // Note: result is in 1/32 of msecs. |
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536 static unsigned short tmr3(void) |
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537 { |
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538 _asm |
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539 movff 0xfb2,PRODL // TMR3L |
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540 movff 0xfb3,PRODH // TMR3H |
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541 _endasm // result in PRODH:PRODL. |
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542 } |
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543 |
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544 ////////////////////////////////////////////////////////////////////////////// |
| 258 | 545 // read buhlmann tables A and B for compatriment ci |
| 546 // | |
| 547 static void read_buhlmann_coefficients(void) | |
| 165 | 548 { |
| 184 | 549 #ifndef CROSS_COMPILE |
| 167 | 550 // Note: we don't use far rom pointer, because the |
| 551 // 24 bits is to complex, hence we have to set | |
| 552 // the UPPER page ourself... | |
| 553 // --> Set zero if tables are moved to lower pages ! | |
| 554 _asm | |
| 555 movlw 1 | |
| 556 movwf TBLPTRU,0 | |
| 557 _endasm | |
| 184 | 558 #endif |
| 258 | 559 |
| 197 | 560 assert( 0 <= ci && ci < 16 ); |
| 165 | 561 var_N2_a = buhlmann_a[ci]; |
| 562 var_N2_b = buhlmann_b[ci]; | |
| 167 | 563 var_He_a = (buhlmann_a+16)[ci]; |
| 564 var_He_b = (buhlmann_b+16)[ci]; | |
| 565 | |
| 165 | 566 // Check reading consistency: |
| 567 if( (var_N2_a < 0.231) | |
| 568 || (var_N2_a > 1.27) | |
| 569 || (var_N2_b < 0.504) | |
| 570 || (var_N2_b > 0.966) | |
| 571 || (var_He_a < 0.510) | |
| 572 || (var_He_a > 1.75) | |
| 573 || (var_He_b < 0.423) | |
| 574 || (var_He_b > 0.927) | |
| 575 ) | |
| 258 | 576 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; |
| 577 } | |
| 578 | |
| 579 ////////////////////////////////////////////////////////////////////////////// | |
| 580 // read buhlmann tables for compatriment ci | |
| 581 // If period == 0 : 2sec interval | |
| 582 // 1 : 1 min interval | |
| 583 // 2 : 10 min interval. | |
| 584 static void read_buhlmann_times(PARAMETER char period) | |
| 585 { | |
| 586 #ifndef CROSS_COMPILE | |
| 587 // Note: we don't use far rom pointer, because the | |
| 588 // 24 bits is to complex, hence we have to set | |
| 589 // the UPPER page ourself... | |
| 590 // --> Set zero if tables are moved to lower pages ! | |
| 591 _asm | |
| 592 movlw 1 | |
| 593 movwf TBLPTRU,0 | |
| 594 _endasm | |
| 595 #endif | |
| 596 assert( 0 <= ci && ci < 16 ); | |
| 597 | |
| 165 | 598 // Integration intervals. |
| 167 | 599 switch(period) |
| 165 | 600 { |
| 601 case 0: //---- 2 sec ----------------------------------------------------- | |
| 602 var_N2_e = e2secs[ci]; | |
| 167 | 603 var_He_e = (e2secs+16)[ci]; |
| 165 | 604 |
| 605 // Check reading consistency: | |
| 606 if( (var_N2_e < 0.0000363) | |
| 607 || (var_N2_e > 0.00577) | |
| 608 || (var_He_e < 0.0000961) | |
| 609 || (var_He_e > 0.150) | |
| 610 ) | |
| 611 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 612 | |
| 613 break; | |
| 614 | |
| 615 case 1: //---- 1 min ----------------------------------------------------- | |
| 616 var_N2_e = e1min[ci]; | |
| 167 | 617 var_He_e = (e1min+16)[ci]; |
| 165 | 618 |
| 619 // Check reading consistency: | |
| 620 if( (var_N2_e < 1.09E-3) | |
| 621 || (var_N2_e > 0.1592) | |
| 622 || (var_He_e < 0.00288) | |
| 623 || (var_He_e > 0.3682) | |
| 624 ) | |
| 625 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 626 | |
| 627 break; | |
| 628 | |
| 629 case 2: //---- 10 min ---------------------------------------------------- | |
| 630 var_N2_e = e10min[ci]; | |
| 167 | 631 var_He_e = (e10min+16)[ci]; |
| 165 | 632 |
| 633 // Check reading consistency: | |
| 634 if( (var_N2_e < 0.01085) | |
| 635 || (var_N2_e > 0.82323) | |
| 636 || (var_He_e < 0.02846) | |
| 637 || (var_He_e > 0.98986) | |
| 638 ) | |
| 639 int_O_DBG_pre_bitfield |= DBG_ZH16ERR; | |
| 640 | |
| 641 break; | |
| 197 | 642 |
| 643 default: | |
| 644 assert(0); // Never go there... | |
| 165 | 645 } |
| 646 } | |
| 647 | |
| 648 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 649 // calc_next_decodepth_GF |
| 165 | 650 // |
| 116 | 651 // new in v.102 |
| 165 | 652 // |
| 116 | 653 // INPUT, changing during dive: |
| 192 | 654 // low_depth |
| 167 | 655 // |
| 116 | 656 // INPUT, fixed during dive: |
| 167 | 657 // pres_surface |
| 658 // GF_delta | |
| 659 // GF_high | |
| 660 // GF_low | |
| 171 | 661 // char_I_depth_last_deco |
| 167 | 662 // float_deco_distance |
| 663 // | |
| 241 | 664 // RETURN TRUE iff a stop is needed. |
| 665 // | |
| 116 | 666 // OUTPUT |
| 171 | 667 // locked_GF_step |
| 167 | 668 // temp_depth_limt |
| 192 | 669 // low_depth |
| 167 | 670 // |
| 241 | 671 static unsigned char calc_nextdecodepth(void) |
| 167 | 672 { |
| 241 | 673 //--- Max ascent speed --------------------------------------------------- |
| 674 // Recompute leading gas limit, at current depth: | |
| 675 overlay float depth = (temp_deco - pres_surface) / 0.09985; | |
| 676 | |
| 677 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 678 overlay float min_depth = depth - 10.0; | |
| 679 | |
| 680 // Do we need to stop at current depth ? | |
| 681 overlay unsigned char need_stop = 0; | |
| 682 | |
| 683 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 684 assert( low_depth < 255 ); | |
| 685 | |
| 212 | 686 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
| 116 | 687 if (char_I_deco_model == 1) |
| 688 { | |
| 241 | 689 if( depth >= low_depth ) |
| 192 | 690 sim_limit( GF_low ); |
| 691 else | |
| 692 sim_limit( GF_high - depth * locked_GF_step ); | |
| 693 | |
| 694 // Stops are needed ? | |
| 695 if( sim_lead_tissue_limit > pres_surface ) | |
| 696 { | |
| 241 | 697 // Deepest stop, in meter (rounded up with a margin of 0.5m) |
| 698 overlay unsigned char first_stop = 3 * (short)(0.83 + (sim_lead_tissue_limit - pres_surface) / 0.29955); | |
| 192 | 699 assert( first_stop < 128 ); |
| 171 | 700 |
| 212 | 701 // Apply correction for the shallowest stop. |
| 192 | 702 if( first_stop == 3 ) // new in v104 |
| 703 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 171 | 704 |
| 192 | 705 // Check all stops until one is higher than tolerated presure |
| 706 while(first_stop > 0) | |
| 707 { | |
| 708 overlay unsigned char next_stop; // Next index (0..30) | |
| 709 overlay float pres_stop; // Next depth (0m..90m) | |
| 171 | 710 |
| 241 | 711 // Check max speed, or reaching surface. |
| 712 if( first_stop <= min_depth ) | |
| 713 break; | |
| 714 | |
| 715 // So, there is indeed a stop needed: | |
| 716 need_stop = 1; | |
| 717 | |
| 192 | 718 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
| 719 next_stop = 0; | |
| 216 | 720 else if( first_stop == 6 ) |
| 721 next_stop = char_I_depth_last_deco; | |
| 192 | 722 else |
| 723 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 167 | 724 |
| 241 | 725 pres_stop = next_stop * 0.09985 // Meters to bar |
| 192 | 726 + pres_surface; |
| 727 | |
| 212 | 728 // Keep GF_low until a first stop depth is found: |
| 729 if( next_stop >= low_depth ) | |
| 730 sim_limit( GF_low ); | |
| 731 else | |
| 732 // current GF is GF_high - alpha (GF_high - GF_low) | |
| 733 // With alpha = currentDepth / maxDepth, hence in [0..1] | |
| 734 sim_limit( GF_high - next_stop * locked_GF_step ); | |
| 171 | 735 |
| 192 | 736 // upper limit (lowest pressure tolerated): |
| 737 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
| 738 break; | |
| 739 | |
| 740 // Else, validate that stop and loop... | |
| 741 first_stop = next_stop; | |
| 742 } | |
| 171 | 743 |
| 212 | 744 // Is it a new deepest first stop ? If yes this is the reference for |
| 745 // the varying gradient factor. So reset that: | |
| 241 | 746 if( first_stop > min_depth && first_stop > low_depth ) |
| 212 | 747 { |
| 748 // Store the deepest stop depth, as reference for GF_low. | |
| 749 low_depth = first_stop; | |
| 750 locked_GF_step = GF_delta / low_depth; | |
| 751 } | |
| 752 | |
| 753 // next stop is the last validated depth found, aka first_stop | |
| 192 | 754 temp_depth_limit = first_stop; // Stop depth, in meter. |
| 755 } | |
| 171 | 756 else |
| 192 | 757 temp_depth_limit = 0; // stop depth, in meter. |
| 116 | 758 } |
| 167 | 759 else //---- ZH-L16 model ------------------------------------------------- |
| 116 | 760 { |
| 192 | 761 overlay float pres_gradient; |
| 762 | |
| 763 // Original model | |
| 116 | 764 // optimized in v.101 |
| 171 | 765 // char_I_depth_last_deco included in v.101 |
| 116 | 766 |
| 192 | 767 // Compute sim_lead_tissue_limit too, but just once. |
| 768 sim_limit(1.0); | |
| 769 | |
| 770 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 167 | 771 if (pres_gradient >= 0) |
| 116 | 772 { |
| 241 | 773 pres_gradient /= 0.29955; // Bar --> stop number; |
| 203 | 774 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> meter : depth for deco |
| 241 | 775 need_stop = 1; // Hit. |
| 776 | |
| 777 // Implement last stop at 4m/5m/6m... | |
| 778 if( temp_depth_limit == 3 ) | |
| 779 temp_depth_limit = char_I_depth_last_deco; | |
| 171 | 780 } |
| 116 | 781 else |
| 241 | 782 temp_depth_limit = 0; |
| 171 | 783 } |
| 212 | 784 |
| 217 | 785 //---- Check gas change -------------------------------------------------- |
| 241 | 786 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
| 787 | |
| 788 return need_stop; | |
| 167 | 789 } |
| 116 | 790 |
| 167 | 791 ////////////////////////////////////////////////////////////////////////////// |
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792 // copy_deco_table |
| 167 | 793 // |
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794 // Buffer the stops, once computed, so we can continue to display them |
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795 // while computing the next set. |
| 167 | 796 // |
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797 static void copy_deco_table(void) |
| 116 | 798 { |
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799 // Copy depth of the first (deepest) stop, because when reversing |
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800 // order, it will be hard to find... |
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801 char_O_first_deco_depth = internal_deco_depth[0]; |
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802 char_O_first_deco_time = internal_deco_time [0]; |
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803 |
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804 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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805 { |
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806 overlay unsigned char x, y; |
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807 |
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808 //---- First: search the first non-null depth |
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809 for(x=31; x != 0; --x) |
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810 if( internal_deco_depth[x] != 0 ) break; |
| 116 | 811 |
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812 //---- Second: copy to output table (in reverse order) |
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813 for(y=0; y<32; y++, --x) |
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814 { |
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815 char_O_deco_depth[y] = internal_deco_depth[x]; |
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816 char_O_deco_time [y] = internal_deco_time [x]; |
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817 |
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818 // Stop only once the last transfer is done. |
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819 if( x == 0 ) break; |
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820 } |
| 116 | 821 |
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822 //---- Third: fill table end with null |
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823 for(y++; y<32; y++) |
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824 { |
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825 char_O_deco_time [y] = 0; |
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826 char_O_deco_depth[y] = 0; |
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827 } |
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828 } |
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829 else //---- Straight copy ------------------------------------------------ |
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830 { |
| 167 | 831 overlay unsigned char x; |
| 832 | |
|
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833 for(x=0; x<32; x++) |
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834 { |
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835 char_O_deco_depth[x] = internal_deco_depth[x]; |
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836 char_O_deco_time [x] = internal_deco_time [x]; |
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837 } |
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838 } |
| 167 | 839 } |
| 116 | 840 |
| 167 | 841 ////////////////////////////////////////////////////////////////////////////// |
| 116 | 842 // temp_tissue_safety // |
| 167 | 843 // |
| 116 | 844 // outsourced in v.102 |
| 167 | 845 // |
| 846 // Apply safety factors for brand ZH-L16 model. | |
| 847 // | |
| 848 static void temp_tissue_safety(void) | |
| 116 | 849 { |
| 197 | 850 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
| 851 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 852 | |
| 167 | 853 if( char_I_deco_model == 0 ) |
| 116 | 854 { |
| 855 if (temp_tissue < 0.0) | |
| 126 | 856 temp_tissue *= float_desaturation_multiplier; |
| 116 | 857 else |
| 126 | 858 temp_tissue *= float_saturation_multiplier; |
| 116 | 859 } |
| 167 | 860 } |
| 116 | 861 |
| 167 | 862 ////////////////////////////////////////////////////////////////////////////// |
| 863 ////////////////////////////////////////////////////////////////////////////// | |
| 116 | 864 // ** THE JUMP-IN CODE ** |
| 865 // ** for the asm code ** | |
| 167 | 866 ////////////////////////////////////////////////////////////////////////////// |
| 867 ////////////////////////////////////////////////////////////////////////////// | |
|
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868 |
| 167 | 869 ////////////////////////////////////////////////////////////////////////////// |
|
169
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870 // Called every 2 seconds during diving. |
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871 // update tissues every time. |
| 184 | 872 // |
|
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873 // Every 6 seconds (or slower when TTS > 16): |
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874 // - update deco table (char_O_deco_time/depth) with new values. |
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875 // - update ascent time, |
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876 // - set status to zero (so we can check there is new results). |
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877 // |
| 116 | 878 void deco_calc_hauptroutine(void) |
| 879 { | |
|
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880 RESET_C_STACK |
| 116 | 881 calc_hauptroutine(); |
| 882 int_O_desaturation_time = 65535; | |
| 883 } | |
| 884 | |
| 167 | 885 ////////////////////////////////////////////////////////////////////////////// |
| 184 | 886 // Reset decompression model: |
| 887 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 888 // + Reset last stop to 0m | |
| 889 // + Reset all model output. | |
| 116 | 890 void deco_clear_tissue(void) |
| 891 { | |
|
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892 RESET_C_STACK |
| 116 | 893 clear_tissue(); |
| 894 } | |
| 895 | |
| 167 | 896 ////////////////////////////////////////////////////////////////////////////// |
| 897 | |
| 116 | 898 void deco_calc_wo_deco_step_1_min(void) |
| 899 { | |
|
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900 RESET_C_STACK |
| 116 | 901 calc_wo_deco_step_1_min(); |
| 902 deco_calc_desaturation_time(); | |
| 903 } | |
| 904 | |
| 167 | 905 ////////////////////////////////////////////////////////////////////////////// |
| 906 | |
| 116 | 907 void deco_debug(void) |
| 908 { | |
|
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909 RESET_C_STACK |
| 116 | 910 } |
| 911 | |
| 241 | 912 |
| 913 ////////////////////////////////////////////////////////////////////////////// | |
| 914 // Find current gas in the list (if any). | |
| 915 // | |
| 916 // Input: char_I_deco_N2_ratio[] and He, to detect breathed gas. | |
| 917 // | |
| 918 // Output: sim_gas_depth_used | |
| 919 // | |
| 920 static void gas_switch_find_current(void) | |
| 921 { | |
|
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922 overlay unsigned char j; |
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923 overlay unsigned char N2 = (unsigned char)(N2_ratio * 100 + 0.5); |
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924 overlay unsigned char He = (unsigned char)(He_ratio * 100 + 0.5); |
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925 |
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926 for(j=0; j<5; ++j) |
| 241 | 927 { |
|
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928 // Make sure to detect if we are already breathing some gas in |
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929 // the current list (happends when first gas do have a depth). |
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930 if( N2 == char_I_deco_N2_ratio[j] |
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931 && He == char_I_deco_He_ratio[j] |
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932 ) |
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933 { |
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934 temp_depth_limit = sim_gas_last_depth = char_I_deco_gas_change[j]; |
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935 sim_gas_last_used = j+1; |
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936 break; |
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937 } |
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938 } |
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939 |
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940 // If there is no gas-switch-delay running ? |
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941 if( sim_gas_delay <= sim_dive_mins) |
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942 { |
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943 // Compute current depth: |
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944 overlay unsigned char depth = (unsigned char)((pres_respiration - pres_surface) / 0.09985); |
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945 assert( depth < 130 ); |
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946 |
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947 // And if I'm above the last decostop (with the 3m margin) ? |
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948 if( (sim_gas_last_depth-3) > depth ) |
| 241 | 949 { |
|
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950 for(j=0; j<5; ++j) |
| 241 | 951 { |
|
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952 // And If I am in the range of a valide stop ? |
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953 // (again, with the same 3m margin) |
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954 if( char_I_deco_gas_change[j] |
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955 && depth <= char_I_deco_gas_change[j] |
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956 && depth >= (char_I_deco_gas_change[j] - 3) |
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957 ) |
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958 { |
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959 // Then start gas-switch timer there, |
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960 sim_gas_delay = sim_dive_mins |
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961 + read_custom_function(55); |
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962 |
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963 // And make sure decostop will be recorded at the right depth. |
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964 temp_depth_limit = char_I_deco_gas_change[j]; |
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965 break; |
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966 } |
| 241 | 967 } |
| 968 } | |
|
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969 else |
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970 // Make clear there is no deay anymore. |
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971 sim_gas_delay = 0; |
| 241 | 972 } |
| 973 } | |
| 974 | |
| 167 | 975 ////////////////////////////////////////////////////////////////////////////// |
| 217 | 976 // Find deepest available gas. |
| 201 | 977 // |
| 241 | 978 // Input: temp_depth_limit, |
| 979 // deco_gas_change[] | |
| 980 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
| 212 | 981 // |
| 241 | 982 // RETURNS TRUE if a stop is needed for gas switch. |
| 983 // | |
| 984 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
| 212 | 985 // |
| 241 | 986 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
| 987 // are null), or during the ascent to make sure we are not passing a | |
| 988 // stop (in which case both can be already set). | |
| 989 // | |
| 990 static unsigned char gas_switch_deepest(void) | |
| 201 | 991 { |
| 241 | 992 overlay unsigned char switch_deco = 0, switch_last = 0; |
| 201 | 993 |
| 994 if (char_I_const_ppO2 == 0) | |
| 995 { | |
| 225 | 996 overlay unsigned char j; |
| 997 | |
| 241 | 998 // Loop over all enabled gas, to find the deepest one, |
| 999 // above las gas, but below temp_depth_limit. | |
| 1000 for(j=0; j<5; ++j) | |
| 225 | 1001 { |
| 241 | 1002 // Gas not (yet) allowed ? Skip ! |
| 1003 if( temp_depth_limit > deco_gas_change[j] ) | |
| 1004 continue; | |
| 1005 | |
| 1006 // Gas deeper than the current/previous one ? Skip ! | |
| 1007 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) | |
| 1008 continue; | |
| 1009 | |
| 1010 // First, or deeper ? | |
|
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1011 if( switch_deco < deco_gas_change[j] ) |
| 241 | 1012 { |
| 1013 switch_deco = deco_gas_change[j]; | |
| 1014 switch_last = j+1; | |
| 1015 } | |
| 225 | 1016 } |
| 201 | 1017 } |
| 1018 | |
| 203 | 1019 // If there is a better gas available |
| 241 | 1020 if( switch_deco ) |
| 201 | 1021 { |
| 241 | 1022 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
| 201 | 1023 |
| 241 | 1024 // Should restart gas-switch delay only when gas do changes... |
| 1025 assert( sim_gas_delay <= sim_dive_mins ); | |
| 217 | 1026 |
| 241 | 1027 sim_gas_last_depth = switch_deco; |
| 1028 sim_gas_last_used = switch_last; | |
| 1029 sim_gas_delay = read_custom_function(55); | |
| 217 | 1030 |
| 241 | 1031 // Apply depth correction ONLY if CF#55 is not null: |
| 1032 if( sim_gas_delay > 0 ) | |
| 225 | 1033 { |
| 241 | 1034 sim_gas_delay += sim_dive_mins; |
| 1035 temp_depth_limit = switch_deco; | |
| 1036 return 1; | |
| 225 | 1037 } |
| 241 | 1038 |
| 1039 return 0; | |
| 217 | 1040 } |
| 1041 | |
| 241 | 1042 sim_gas_delay = 0; |
| 1043 return 0; | |
| 217 | 1044 } |
| 1045 | |
| 1046 ////////////////////////////////////////////////////////////////////////////// | |
| 1047 // Calculate gas switches | |
| 1048 // | |
| 1049 // | |
| 1050 // Input: N2_ratio, He_ratio. | |
| 1051 // sim_gas_last_used | |
| 1052 // | |
| 1053 // Output: calc_N2_ratio, calc_He_ratio | |
| 1054 // | |
| 241 | 1055 static void gas_switch_set(void) |
| 217 | 1056 { |
| 224 | 1057 assert( 0 <= sim_gas_last_used && sim_gas_last_used <= 5 ); |
| 217 | 1058 |
| 224 | 1059 if( sim_gas_last_used == 0 ) |
| 1060 { | |
| 1061 calc_N2_ratio = N2_ratio; | |
| 1062 calc_He_ratio = He_ratio; | |
| 1063 } | |
| 1064 else | |
| 1065 { | |
| 1066 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
| 1067 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
| 217 | 1068 } |
| 201 | 1069 |
| 1070 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
| 1071 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
| 1072 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
| 1073 } | |
| 1074 | |
| 1075 ////////////////////////////////////////////////////////////////////////////// | |
| 1076 // | |
| 212 | 1077 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
| 1078 // temp_deco : simulated respiration pressure + security offset (deco_distance) | |
| 1079 // Water-vapor pressure inside lumbs (ppWVapour). | |
| 1080 // | |
| 236 | 1081 // Output: ppN2, ppHe. |
| 212 | 1082 // |
| 1083 static void sim_alveolar_presures(void) | |
| 201 | 1084 { |
| 212 | 1085 overlay float deco_diluent = temp_deco; // new in v.101 |
| 1086 | |
| 1087 //---- CCR mode : deco gas switch ? -------------------------------------- | |
| 201 | 1088 if (char_I_const_ppO2 != 0) |
| 1089 { | |
| 212 | 1090 // In CCR mode, calc_XX_ratio == XX_ratio. |
| 1091 if( temp_deco > deco_ppO2_change ) | |
| 1092 deco_diluent = ((temp_deco - const_ppO2)/(calc_N2_ratio + calc_He_ratio)); | |
| 201 | 1093 else |
| 212 | 1094 deco_diluent = ((temp_deco - deco_ppO2)/(calc_N2_ratio + calc_He_ratio)); |
| 1095 | |
| 1096 if (deco_diluent > temp_deco) | |
| 1097 deco_diluent = temp_deco; | |
| 201 | 1098 } |
| 1099 | |
| 212 | 1100 // Take deco offset into account, but not at surface. |
| 1101 if( deco_diluent > pres_surface ) | |
| 1102 deco_diluent += float_deco_distance; | |
| 1103 | |
| 1104 if( deco_diluent > ppWVapour ) | |
| 201 | 1105 { |
| 236 | 1106 ppN2 = calc_N2_ratio * (deco_diluent - ppWVapour); |
| 201 | 1107 ppHe = calc_He_ratio * (deco_diluent - ppWVapour); |
| 1108 } | |
| 1109 else | |
| 1110 { | |
| 236 | 1111 ppN2 = 0.0; |
| 201 | 1112 ppHe = 0.0; |
| 1113 } | |
| 236 | 1114 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
| 201 | 1115 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
| 1116 } | |
| 1117 | |
| 1118 ////////////////////////////////////////////////////////////////////////////// | |
| 167 | 1119 // clear_tissue |
| 1120 // | |
| 165 | 1121 // optimized in v.101 (var_N2_a) |
| 167 | 1122 // |
| 1123 // preload tissues with standard pressure for the given ambient pressure. | |
| 1124 // Note: fixed N2_ratio for standard air. | |
| 201 | 1125 // |
| 167 | 1126 static void clear_tissue(void) |
| 116 | 1127 { |
| 1128 flag_in_divemode = 0; | |
| 1129 int_O_DBS_bitfield = 0; | |
| 1130 int_O_DBS2_bitfield = 0; | |
| 1131 int_O_DBG_pre_bitfield = 0; | |
| 1132 int_O_DBG_post_bitfield = 0; | |
| 1133 char_O_NDL_at_20mtr = 255; | |
| 1134 | |
| 167 | 1135 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
| 1136 N2_ratio = 0.7902; | |
| 212 | 1137 pres_respiration = int_I_pres_respiration * 0.001; |
| 164 | 1138 |
| 167 | 1139 for(ci=0; ci<16; ci++) |
| 126 | 1140 { |
| 197 | 1141 // cycle through the 16 Bühlmann tissues |
| 200 | 1142 overlay float p = N2_ratio * (pres_respiration - ppWVapour); |
| 164 | 1143 pres_tissue[ci] = p; |
| 197 | 1144 |
| 1145 // cycle through the 16 Bühlmann tissues for Helium | |
| 167 | 1146 (pres_tissue+16)[ci] = 0.0; |
| 126 | 1147 } // for 0 to 16 |
| 116 | 1148 |
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1149 clear_deco_table(); |
| 126 | 1150 char_O_deco_status = 0; |
| 1151 char_O_nullzeit = 0; | |
| 168 | 1152 int_O_ascenttime = 0; |
| 126 | 1153 char_O_gradient_factor = 0; |
| 1154 char_O_relative_gradient_GF = 0; | |
| 197 | 1155 char_I_depth_last_deco = 0; // for compatibility with v.101pre_no_last_deco |
| 258 | 1156 |
| 1157 calc_lead_tissue_limit = 0.0; | |
| 1158 char_O_gtissue_no = 0; | |
| 167 | 1159 } |
| 116 | 1160 |
| 167 | 1161 ////////////////////////////////////////////////////////////////////////////// |
| 1162 // calc_hauptroutine | |
| 1163 // | |
| 1164 // this is the major code in dive mode calculates: | |
| 116 | 1165 // the tissues, |
| 167 | 1166 // the bottom time, |
| 1167 // and simulates the ascend with all deco stops. | |
| 171 | 1168 // |
| 1169 // The deco_state sequence is : | |
| 1170 // 3 (at surface) | |
| 1171 // +---> 0 : calc nullzeit | |
| 1172 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 1173 // | +-> 1 : simulate up to 16min of stops. | |
| 1174 // | +------< not finished | |
| 1175 // +--------< finish | |
| 1176 // | |
| 167 | 1177 static void calc_hauptroutine(void) |
| 116 | 1178 { |
| 241 | 1179 static unsigned char backup_gas_used = 0; |
| 1180 static unsigned char backup_gas_depth = 0; | |
| 217 | 1181 static unsigned char backup_gas_delay = 0; |
| 186 | 1182 |
| 116 | 1183 calc_hauptroutine_data_input(); |
| 1184 | |
| 1185 if(!flag_in_divemode) | |
| 1186 { | |
| 1187 flag_in_divemode = 1; | |
| 1188 create_dbs_set_dbg_and_ndl20mtr(); | |
| 1189 } | |
| 1190 else | |
| 1191 check_pre_dbg(); | |
| 1192 | |
| 1193 calc_hauptroutine_update_tissues(); | |
| 1194 calc_gradient_factor(); | |
| 1195 | |
| 167 | 1196 // toggle between calculation for nullzeit (bottom time), |
| 1197 // deco stops | |
| 1198 // and more deco stops (continue) | |
| 1199 switch( char_O_deco_status ) | |
| 116 | 1200 { |
| 186 | 1201 case 3: //---- At surface: start a new dive ------------------------------ |
| 1202 clear_deco_table(); | |
| 1203 copy_deco_table(); | |
| 200 | 1204 int_O_ascenttime = 0; // Reset DTR. |
| 1205 char_O_nullzeit = 0; // Reset bottom time. | |
| 1206 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. | |
| 201 | 1207 |
| 217 | 1208 // Values that should be reset just once for the full real dive. |
| 1209 // This is used to record the lowest stop for the whole dive, | |
| 1210 // Including ACCROSS all simulated ascent. | |
| 1211 low_depth = 0; | |
| 1212 | |
| 1213 // Reset gas switch history. | |
| 241 | 1214 backup_gas_used = sim_gas_last_used = 0; |
| 1215 backup_gas_depth = sim_gas_last_depth = 0; | |
| 217 | 1216 backup_gas_delay = sim_gas_delay = 0; |
| 203 | 1217 sim_dive_mins = 0; |
| 1218 break; | |
| 186 | 1219 |
| 167 | 1220 case 0: //---- bottom time ----------------------------------------------- |
| 1221 calc_nullzeit(); | |
| 1222 check_ndl(); | |
| 186 | 1223 char_O_deco_status = 2; // calc ascent next time. |
| 1224 break; | |
| 1225 | |
| 1226 case 2: //---- Simulate ascent to first stop ----------------------------- | |
| 203 | 1227 // Check proposed gas at begin of ascent simulation |
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1228 sim_dive_mins = int_I_divemins; // Init current time. |
| 241 | 1229 |
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1230 gas_switch_find_current(); // Lookup for current gas & time. |
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1231 gas_switch_set(); // setup calc_ratio's |
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1232 |
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1233 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1234 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
| 203 | 1235 backup_gas_delay = sim_gas_delay; |
| 186 | 1236 |
| 1237 sim_ascent_to_first_stop(); | |
| 201 | 1238 |
| 1239 char_O_deco_status = 1; // Calc stops next time (deco or gas switch). | |
| 167 | 1240 break; |
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1241 |
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1242 case 1: //---- Simulate stops -------------------------------------------- |
| 167 | 1243 calc_hauptroutine_calc_deco(); |
| 186 | 1244 |
| 1245 // If simulation is finished, restore the GF low reference, so that | |
| 1246 // next ascent simulation is done from the current depth: | |
| 217 | 1247 if( char_O_deco_status == 0 ) |
| 186 | 1248 { |
| 241 | 1249 sim_gas_last_used = backup_gas_used; |
| 1250 sim_gas_last_depth = backup_gas_depth; | |
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1251 sim_gas_delay = backup_gas_delay; |
| 186 | 1252 } |
| 167 | 1253 break; |
| 116 | 1254 } |
| 167 | 1255 |
| 116 | 1256 check_post_dbg(); |
| 1257 } | |
| 1258 | |
| 167 | 1259 ////////////////////////////////////////////////////////////////////////////// |
| 1260 // calc_hauptroutine_data_input | |
| 1261 // | |
| 1262 // Reset all C-code dive parameters from their ASM-code values. | |
| 1263 // Detect gas change condition. | |
| 1264 // | |
| 116 | 1265 void calc_hauptroutine_data_input(void) |
| 1266 { | |
| 203 | 1267 overlay short int_temp; |
| 126 | 1268 |
| 197 | 1269 pres_respiration = int_I_pres_respiration * 0.001; |
| 1270 pres_surface = int_I_pres_surface * 0.001; | |
| 1271 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1272 He_ratio = char_I_He_ratio * 0.01; | |
| 1273 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
| 116 | 1274 |
| 126 | 1275 // ____________________________________________________ |
| 1276 // | |
| 1277 // _____________ G A S _ C H A N G E S ________________ | |
| 1278 // ____________________________________________________ | |
| 1279 | |
| 212 | 1280 // Keep a margin of 150mbar = 1.50m |
| 1281 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1282 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 126 | 1283 |
| 225 | 1284 deco_gas_change[0] = 0; |
| 1285 deco_gas_change[1] = 0; | |
| 1286 deco_gas_change[2] = 0; | |
| 1287 deco_gas_change[3] = 0; | |
| 1288 deco_gas_change[4] = 0; | |
| 116 | 1289 |
| 203 | 1290 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
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1291 if(char_I_deco_gas_change[0]) |
| 126 | 1292 { |
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1293 if( int_temp > 100 *(short)char_I_deco_gas_change[0] ) |
| 225 | 1294 deco_gas_change[0] = char_I_deco_gas_change[0]; |
| 126 | 1295 } |
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1296 if(char_I_deco_gas_change[1]) |
| 126 | 1297 { |
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1298 if( int_temp > 100 *(short)char_I_deco_gas_change[1] ) |
| 225 | 1299 deco_gas_change[1] = char_I_deco_gas_change[1]; |
| 126 | 1300 } |
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1301 if(char_I_deco_gas_change[2]) |
| 126 | 1302 { |
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1303 if( int_temp > 100 *(short)char_I_deco_gas_change[2] ) |
| 225 | 1304 deco_gas_change[2] = char_I_deco_gas_change[2]; |
| 126 | 1305 } |
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1306 if(char_I_deco_gas_change[3]) |
| 126 | 1307 { |
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1308 if( int_temp > 100 *(short)char_I_deco_gas_change[3] ) |
| 225 | 1309 deco_gas_change[3] = char_I_deco_gas_change[3]; |
| 126 | 1310 } |
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1311 if(char_I_deco_gas_change[4]) |
| 126 | 1312 { |
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1313 if( int_temp > 100 *(short)char_I_deco_gas_change[4] ) |
| 225 | 1314 deco_gas_change[4] = char_I_deco_gas_change[4]; |
| 126 | 1315 } |
| 116 | 1316 |
| 197 | 1317 const_ppO2 = char_I_const_ppO2 * 0.01; |
| 1318 deco_ppO2_change = char_I_deco_ppO2_change / 99.95 | |
| 1319 + pres_surface | |
| 1320 + float_deco_distance; | |
| 1321 deco_ppO2 = char_I_deco_ppO2 * 0.01; | |
| 1322 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1323 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1324 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1325 GF_high = char_I_GF_High_percentage * 0.01; | |
| 126 | 1326 GF_delta = GF_high - GF_low; |
| 116 | 1327 } |
| 1328 | |
| 167 | 1329 ////////////////////////////////////////////////////////////////////////////// |
| 171 | 1330 // |
| 1331 // | |
| 116 | 1332 void calc_hauptroutine_update_tissues(void) |
| 1333 { | |
| 197 | 1334 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
| 1335 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
| 1336 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
| 237 | 1337 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1338 |
| 1339 if (char_I_const_ppO2 == 0) // new in v.101 | |
| 167 | 1340 pres_diluent = pres_respiration; // new in v.101 |
| 186 | 1341 else |
| 1342 { | |
| 167 | 1343 pres_diluent = ((pres_respiration - const_ppO2)/(N2_ratio + He_ratio)); // new in v.101 |
| 186 | 1344 if (pres_diluent > pres_respiration) // new in v.101 |
| 1345 pres_diluent = pres_respiration; // new in v.101 | |
| 1346 } | |
| 200 | 1347 if (pres_diluent > ppWVapour) // new in v.101 |
| 116 | 1348 { |
| 236 | 1349 ppN2 = N2_ratio * (pres_diluent - ppWVapour); // changed in v.101 |
| 200 | 1350 ppHe = He_ratio * (pres_diluent - ppWVapour); // changed in v.101 |
| 116 | 1351 char_O_diluent = (char)(pres_diluent/pres_respiration*100.0); |
| 1352 } | |
| 167 | 1353 else // new in v.101 |
| 116 | 1354 { |
| 236 | 1355 ppN2 = 0.0; // new in v.101 |
| 200 | 1356 ppHe = 0.0; // new in v.101 |
| 116 | 1357 char_O_diluent = 0; |
| 1358 } | |
| 1359 | |
| 1360 if(!char_I_step_is_1min) | |
| 192 | 1361 calc_tissue(0); |
| 116 | 1362 else |
| 192 | 1363 calc_tissue(1); |
| 186 | 1364 |
| 192 | 1365 // Calc limit for surface, ie. GF_high. |
| 258 | 1366 calc_limit(); |
| 186 | 1367 |
| 203 | 1368 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
| 1369 int_O_gtissue_press = (short)((pres_tissue[char_O_gtissue_no] + (pres_tissue+16)[char_O_gtissue_no]) * 1000); | |
| 192 | 1370 |
| 1371 // if guiding tissue can not be exposed to surface pressure immediately | |
| 1372 if( calc_lead_tissue_limit > pres_surface && char_O_deco_status == 0) | |
| 116 | 1373 { |
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1374 char_O_nullzeit = 0; // deco necessary |
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1375 char_O_deco_status = 2; // calculate ascent on next iteration. |
| 116 | 1376 } |
| 171 | 1377 } |
| 1378 | |
| 116 | 1379 |
| 167 | 1380 ////////////////////////////////////////////////////////////////////////////// |
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1381 // Compute stops. |
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1382 // |
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1383 // Note: because this can be very long, break on 16 iterations, and set state |
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1384 // to 0 when finished, or to 1 when needing to continue. |
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1385 // Note: because this might be very long (~ 66 ms by iteration in 1.84beta), |
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1386 // break the loop when total time > 512msec. |
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1387 // |
| 116 | 1388 void calc_hauptroutine_calc_deco(void) |
| 1389 { | |
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1390 overlay unsigned char loop; |
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1391 |
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1392 for(loop = 0; loop < 16; ++loop) |
| 116 | 1393 { |
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1394 // Limit loops to 512ms, using the RTC timer 3: |
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1395 if( tmr3() & (512*32) ) |
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1396 break; |
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1397 |
| 241 | 1398 // Do not ascent while doing a gas switch ? |
| 203 | 1399 if( sim_gas_delay <= sim_dive_mins ) |
| 1400 { | |
| 241 | 1401 if( calc_nextdecodepth() ) |
| 1402 { | |
| 1403 if( temp_depth_limit == 0 ) | |
| 1404 goto Surface; | |
| 116 | 1405 |
| 241 | 1406 //---- We hit a stop at temp_depth_limit --------------------- |
| 1407 temp_deco = temp_depth_limit * 0.09985 // Convert to relative bar, | |
| 1408 + pres_surface; // To absolute. | |
| 1409 update_deco_table(); // Adds a one minute stops. | |
| 1410 } | |
| 1411 else | |
| 1412 { | |
| 1413 //---- No stop ----------------------------------------------- | |
| 1414 temp_deco -= 0.9985; // Ascend 10m, no wait. | |
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1415 |
| 241 | 1416 //---- Finish computations once surface is reached ----------- |
| 1417 if( temp_deco <= pres_surface ) | |
| 1418 { | |
| 1419 Surface: | |
| 1420 copy_deco_table(); | |
| 1421 calc_ascenttime(); | |
| 1422 char_O_deco_status = 0; // calc nullzeit next time. | |
| 1423 return; | |
| 1424 } | |
| 1425 } | |
| 212 | 1426 |
| 1427 } | |
| 1428 else | |
| 241 | 1429 update_deco_table(); // Just pass one minute. |
| 197 | 1430 |
| 241 | 1431 //---- Then update tissue -------------------------------------------- |
| 203 | 1432 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1433 gas_switch_set(); // Apply any simulated gas change, once validated. |
| 212 | 1434 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
| 192 | 1435 sim_tissue(1); // Simulate compartiments for 1 minute. |
| 116 | 1436 } |
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1437 |
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1438 // Surface not reached, need more stops... |
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1439 char_O_deco_status = 1; // calc more stops next time. |
| 116 | 1440 } |
| 1441 | |
| 167 | 1442 ////////////////////////////////////////////////////////////////////////////// |
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1443 // Simulation ascention to first deco stop. |
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1444 // |
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1445 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1446 // there is no need to break on more that 16 iterations |
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1447 // (or we are already in deep shit). |
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1448 // |
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1449 void sim_ascent_to_first_stop(void) |
| 116 | 1450 { |
| 171 | 1451 update_startvalues(); |
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1452 clear_deco_table(); |
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1453 |
| 200 | 1454 temp_deco = pres_respiration; // Starts from current real depth. |
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1455 |
| 212 | 1456 // Do we have a gas switch going on ? |
| 1457 if( sim_gas_delay > sim_dive_mins ) | |
| 1458 return; | |
| 1459 | |
| 241 | 1460 //---- Loop until first stop, gas switch, or surface is reached ---------- |
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1461 for(;;) |
| 116 | 1462 { |
| 241 | 1463 // Try ascending 1 full minute. |
| 1464 temp_deco -= 0.9985; // 1 min, at 10m/min. ~ 1bar. | |
| 203 | 1465 |
| 212 | 1466 // Compute sim_lead_tissue_limit at GF_low (deepest stop). |
| 1467 sim_limit(GF_low); | |
| 1468 | |
| 1469 // Did we reach deepest remaining stop ? | |
| 241 | 1470 if( temp_deco < sim_lead_tissue_limit ) |
| 212 | 1471 { |
| 241 | 1472 temp_deco += 0.9985; // Restore last correct depth, |
| 1473 break; // End fast ascent. | |
| 212 | 1474 } |
| 1475 | |
| 203 | 1476 // Did we reach surface ? |
| 1477 if( temp_deco <= pres_surface ) | |
| 1478 { | |
| 1479 temp_deco = pres_surface; // Yes: finished ! | |
| 1480 break; | |
| 1481 } | |
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1482 |
| 241 | 1483 // Check for gas change below new depth ? |
| 1484 temp_depth_limit = (temp_deco - pres_surface) / 0.09985; | |
| 1485 | |
| 1486 if( gas_switch_deepest() ) | |
| 1487 { | |
| 1488 temp_deco = temp_depth_limit * 0.09985 + pres_surface; | |
| 212 | 1489 break; |
| 241 | 1490 } |
| 171 | 1491 |
| 203 | 1492 sim_dive_mins++; // Advance simulated time by 1 minute. |
| 241 | 1493 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
| 203 | 1494 sim_tissue(1); // and update tissues for 1 min. |
| 1495 } | |
| 167 | 1496 } |
| 116 | 1497 |
| 167 | 1498 ////////////////////////////////////////////////////////////////////////////// |
| 1499 // calc_tissue | |
| 1500 // | |
| 116 | 1501 // optimized in v.101 |
| 167 | 1502 // |
| 184 | 1503 static void calc_tissue(PARAMETER unsigned char period) |
| 116 | 1504 { |
| 251 | 1505 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1506 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1507 |
| 126 | 1508 for (ci=0;ci<16;ci++) |
| 1509 { | |
| 258 | 1510 read_buhlmann_times(period); // 2 sec or 1 min period. |
| 116 | 1511 |
| 126 | 1512 // N2 |
| 236 | 1513 temp_tissue = (ppN2 - pres_tissue[ci]) * var_N2_e; |
| 126 | 1514 temp_tissue_safety(); |
| 167 | 1515 pres_tissue[ci] += temp_tissue; |
| 165 | 1516 |
| 126 | 1517 // He |
| 200 | 1518 temp_tissue = (ppHe - (pres_tissue+16)[ci]) * var_He_e; |
| 126 | 1519 temp_tissue_safety(); |
| 167 | 1520 (pres_tissue+16)[ci] += temp_tissue; |
| 192 | 1521 } |
| 167 | 1522 } |
| 116 | 1523 |
| 167 | 1524 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1525 // calc_limit |
| 167 | 1526 // |
| 192 | 1527 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
| 167 | 1528 // |
| 258 | 1529 static void calc_limit(void) |
| 167 | 1530 { |
| 192 | 1531 char_O_gtissue_no = 255; |
| 1532 calc_lead_tissue_limit = 0.0; | |
| 1533 | |
| 1534 for (ci=0;ci<16;ci++) | |
| 1535 { | |
| 1536 overlay float p = pres_tissue[ci] + (pres_tissue+16)[ci]; | |
| 1537 | |
| 258 | 1538 read_buhlmann_coefficients(); |
| 192 | 1539 var_N2_a = (var_N2_a * pres_tissue[ci] + var_He_a * (pres_tissue+16)[ci]) / p; |
| 1540 var_N2_b = (var_N2_b * pres_tissue[ci] + var_He_b * (pres_tissue+16)[ci]) / p; | |
| 116 | 1541 |
| 192 | 1542 // Apply the Eric Baker's varying gradient factor correction. |
| 1543 // Note: the correction factor depends both on GF and b, | |
| 1544 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1545 // so that can change who is the leading gas... | |
| 1546 // Note: Also depends of the GF. So the calcul is different for | |
| 1547 // GF_low, current GF, or GF_high... | |
| 1548 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1549 // hence what would happend at surface, | |
| 1550 // hence at GF_high. | |
| 1551 if( char_I_deco_model == 1 ) | |
| 258 | 1552 p = ( p - var_N2_a * GF_high) * var_N2_b |
| 1553 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
| 192 | 1554 else |
| 1555 p = (p - var_N2_a) * var_N2_b; | |
| 258 | 1556 if( p < 0.0 ) p = 0.0; |
| 192 | 1557 |
| 1558 if( p > calc_lead_tissue_limit ) | |
| 1559 { | |
| 1560 char_O_gtissue_no = ci; | |
| 1561 calc_lead_tissue_limit = p; | |
| 1562 } | |
| 1563 } | |
| 197 | 1564 |
| 1565 assert( char_O_gtissue_no < 16 ); | |
| 1566 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); | |
| 167 | 1567 } |
| 1568 | |
| 1569 ////////////////////////////////////////////////////////////////////////////// | |
| 1570 // calc_nullzeit | |
| 1571 // | |
| 1572 // calculates the remaining bottom time | |
| 1573 // | |
| 1574 // unchanged in v.101 | |
| 1575 // | |
| 1576 static void calc_nullzeit(void) | |
| 1577 { | |
| 203 | 1578 overlay unsigned char loop; |
| 200 | 1579 update_startvalues(); |
| 167 | 1580 |
| 116 | 1581 char_O_nullzeit = 0; |
| 167 | 1582 for(loop = 1; loop <= 17; loop++) |
| 116 | 1583 { |
| 1584 backup_sim_pres_tissue(); | |
| 197 | 1585 sim_tissue(2); // 10 min. |
| 192 | 1586 sim_limit(GF_high); |
| 167 | 1587 |
| 192 | 1588 if( sim_lead_tissue_limit > pres_surface ) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately |
| 185 | 1589 { |
| 1590 restore_sim_pres_tissue(); | |
| 1591 break; | |
| 1592 } | |
| 1593 // Validate once we know its good. | |
| 1594 char_O_nullzeit += 10; | |
| 167 | 1595 } |
| 1596 | |
| 116 | 1597 if (char_O_nullzeit < 60) |
| 1598 { | |
| 167 | 1599 for(loop=1; loop <= 10; loop++) |
| 116 | 1600 { |
| 197 | 1601 sim_tissue(1); // 1 min |
| 192 | 1602 sim_limit(GF_high); |
| 1603 | |
| 1604 if( sim_lead_tissue_limit > pres_surface) // changed in v.102 , if guiding tissue can not be exposed to surface pressure immediately | |
| 185 | 1605 break; |
| 1606 char_O_nullzeit++; | |
| 167 | 1607 } |
| 185 | 1608 } |
| 1609 } | |
| 116 | 1610 |
| 167 | 1611 ////////////////////////////////////////////////////////////////////////////// |
| 1612 // backup_sim_pres_tissue | |
| 1613 // | |
| 116 | 1614 void backup_sim_pres_tissue(void) |
| 1615 { | |
| 167 | 1616 overlay unsigned char x; |
| 1617 | |
| 1618 for(x = 0; x<32; x++) | |
| 126 | 1619 sim_pres_tissue_backup[x] = sim_pres_tissue[x]; |
| 167 | 1620 } |
| 116 | 1621 |
| 167 | 1622 ////////////////////////////////////////////////////////////////////////////// |
| 1623 // restore_sim_pres_tissue | |
| 1624 // | |
| 116 | 1625 void restore_sim_pres_tissue(void) |
| 1626 { | |
| 167 | 1627 overlay unsigned char x; |
| 1628 | |
| 1629 for(x = 0; x<32; x++) | |
| 126 | 1630 sim_pres_tissue[x] = sim_pres_tissue_backup[x]; |
| 167 | 1631 } |
| 116 | 1632 |
| 167 | 1633 ////////////////////////////////////////////////////////////////////////////// |
| 1634 // calc_ascenttime | |
| 1635 // | |
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1636 static void calc_ascenttime(void) |
| 116 | 1637 { |
| 126 | 1638 if (pres_respiration > pres_surface) |
| 1639 { | |
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1640 overlay unsigned char x; |
| 168 | 1641 |
| 192 | 1642 // + 0.7 to count 1 minute ascent time from 3 meter to surface |
| 1643 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
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1644 if (ascent < 0.0) |
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1645 ascent = 0.0; |
| 203 | 1646 int_O_ascenttime = (unsigned short)(ascent + 0.99); |
| 168 | 1647 |
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1648 for(x=0; x<32 && internal_deco_depth[x]; x++) |
| 203 | 1649 int_O_ascenttime += (unsigned short)internal_deco_time[x]; |
| 126 | 1650 } |
| 1651 else | |
| 168 | 1652 int_O_ascenttime = 0; |
| 167 | 1653 } |
| 116 | 1654 |
| 167 | 1655 ////////////////////////////////////////////////////////////////////////////// |
| 1656 // update_startvalues | |
| 1657 // | |
| 116 | 1658 // updated in v.102 |
| 167 | 1659 // |
| 116 | 1660 void update_startvalues(void) |
| 1661 { | |
| 167 | 1662 overlay unsigned char x; |
| 116 | 1663 |
| 201 | 1664 // Start ascent simulation with current tissue partial pressures. |
| 116 | 1665 for (x = 0;x<16;x++) |
| 1666 { | |
| 1667 sim_pres_tissue[x] = pres_tissue[x]; | |
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1668 (sim_pres_tissue+16)[x] = (pres_tissue+16)[x]; |
| 116 | 1669 } |
| 197 | 1670 |
| 201 | 1671 // No leading tissue (yet) for this ascent simulation. |
| 197 | 1672 sim_lead_tissue_limit = 0.0; |
| 1673 sim_lead_tissue_no = 255; | |
| 167 | 1674 } |
| 116 | 1675 |
| 167 | 1676 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1677 // sim_tissue |
| 167 | 1678 // |
| 116 | 1679 // optimized in v.101 |
| 167 | 1680 // |
| 1681 // Function very simular to calc_tissue, but: | |
| 1682 // + Use a 1min or 10min period. | |
| 1683 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 184 | 1684 static void sim_tissue(PARAMETER unsigned char period) |
| 116 | 1685 { |
| 251 | 1686 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
| 1687 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 236 | 1688 |
| 192 | 1689 for(ci=0; ci<16; ci++) |
| 126 | 1690 { |
| 258 | 1691 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
| 165 | 1692 |
| 126 | 1693 // N2 |
| 236 | 1694 temp_tissue = (ppN2 - sim_pres_tissue[ci]) * var_N2_e; |
| 126 | 1695 temp_tissue_safety(); |
| 167 | 1696 sim_pres_tissue[ci] += temp_tissue; |
| 126 | 1697 |
| 1698 // He | |
| 200 | 1699 temp_tissue = (ppHe - (sim_pres_tissue+16)[ci]) * var_He_e; |
| 126 | 1700 temp_tissue_safety(); |
| 167 | 1701 (sim_pres_tissue+16)[ci] += temp_tissue; |
| 192 | 1702 } |
| 167 | 1703 } |
| 116 | 1704 |
| 167 | 1705 ////////////////////////////////////////////////////////////////////////////// |
| 192 | 1706 // sim_limit() |
| 1707 // | |
| 1708 // New in v.111 | |
| 1709 // | |
| 1710 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1711 // different depth, because it depends on current gradient factor. | |
| 167 | 1712 // |
| 192 | 1713 static void sim_limit(PARAMETER float GF_current) |
| 116 | 1714 { |
| 212 | 1715 assert( 0.0 < GF_current && GF_current <= 1.0f); |
| 1716 | |
| 192 | 1717 sim_lead_tissue_limit = 0.0; |
| 212 | 1718 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
| 192 | 1719 |
| 1720 for(ci=0; ci<16; ci++) | |
| 1721 { | |
| 241 | 1722 overlay float N2 = sim_pres_tissue[ci]; |
| 1723 overlay float He = (sim_pres_tissue+16)[ci]; | |
| 1724 overlay float p = N2 + He; | |
| 192 | 1725 |
| 258 | 1726 read_buhlmann_coefficients(); |
| 241 | 1727 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
| 1728 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 192 | 1729 |
| 1730 // Apply the Eric Baker's varying gradient factor correction. | |
| 1731 // Note: the correction factor depends both on GF and b, | |
| 1732 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1733 // so that can change who is the leading gas... | |
| 1734 // Note: Also depends of the GF_current... | |
| 1735 if( char_I_deco_model == 1 ) | |
| 1736 p = ( p - var_N2_a * GF_current) * var_N2_b | |
| 1737 / (GF_current + var_N2_b * (1.0 - GF_current)); | |
| 1738 else | |
| 1739 p = (p - var_N2_a) * var_N2_b; | |
| 237 | 1740 if( p < 0.0 ) p = 0.0; |
| 192 | 1741 |
| 1742 if( p > sim_lead_tissue_limit ) | |
| 1743 { | |
| 1744 sim_lead_tissue_no = ci; | |
| 1745 sim_lead_tissue_limit = p; | |
| 1746 } | |
| 1747 } // for ci | |
| 197 | 1748 |
| 1749 assert( sim_lead_tissue_no < 16 ); | |
| 237 | 1750 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
| 167 | 1751 } |
| 116 | 1752 |
| 167 | 1753 ////////////////////////////////////////////////////////////////////////////// |
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1754 // clear_deco_table |
| 167 | 1755 // |
| 1756 // unchanged in v.101 | |
| 1757 // | |
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1758 static void clear_deco_table(void) |
| 116 | 1759 { |
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1760 overlay unsigned char x; |
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1761 |
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1762 for(x=0; x<32; ++x) |
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1763 { |
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1764 internal_deco_time [x] = 0; |
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1765 internal_deco_depth[x] = 0; |
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1766 } |
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1767 } |
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1768 |
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1769 ////////////////////////////////////////////////////////////////////////////// |
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1770 // update_deco_table |
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1771 // |
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1772 // Add 1 min to current stop. |
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1773 // |
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1774 // Inputs: |
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1775 // temp_depth_limit = stop's depth, in meters. |
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1776 // In/Out: |
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1777 // internal_deco_depth[] : depth (in meters) of each stops. |
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1778 // internal_deco_time [] : time (in minutes) of each stops. |
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1779 // |
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1780 static void update_deco_table() |
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1781 { |
| 192 | 1782 overlay unsigned char x; |
|
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1783 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1784 assert( temp_depth_limit > 0 ); // No stop at surface... |
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1785 |
| 192 | 1786 for(x=0; x<32; ++x) |
| 1787 { | |
| 212 | 1788 // Make sure deco-stops are recorded in order: |
| 1789 assert( !internal_deco_depth[x] || temp_depth_limit <= internal_deco_depth[x] ); | |
| 1790 | |
| 200 | 1791 if( internal_deco_depth[x] == temp_depth_limit ) |
| 192 | 1792 { |
| 1793 // Do not overflow (max 255') | |
| 1794 if( internal_deco_time[x] < 255 ) | |
| 1795 { | |
| 1796 internal_deco_time[x]++; | |
| 1797 return; | |
| 1798 } | |
| 1799 // But store extra in the next stop... | |
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1800 } |
| 192 | 1801 |
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1802 if( internal_deco_depth[x] == 0 ) |
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1803 { |
| 192 | 1804 internal_deco_depth[x] = temp_depth_limit; |
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1805 internal_deco_time[x] = 1; |
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1806 return; |
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1807 } |
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1808 } |
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1809 |
| 192 | 1810 // Can't store stops at more than 96m. |
| 1811 // Or stops at less that 3m too. | |
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1812 // Just do nothing with that... |
| 167 | 1813 } |
| 116 | 1814 |
| 167 | 1815 ////////////////////////////////////////////////////////////////////////////// |
| 1816 // calc_gradient_factor | |
| 1817 // | |
| 165 | 1818 // optimized in v.101 (var_N2_a) |
| 116 | 1819 // new code in v.102 |
| 167 | 1820 // |
| 1821 static void calc_gradient_factor(void) | |
| 116 | 1822 { |
| 197 | 1823 overlay float gf; |
| 237 | 1824 |
| 197 | 1825 assert( char_O_gtissue_no < 16 ); |
| 237 | 1826 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
| 197 | 1827 |
| 116 | 1828 // tissue > respiration (entsaettigungsvorgang) |
| 1829 // gradient ist wieviel prozent an limit mit basis tissue | |
| 1830 // dh. 0% = respiration == tissue | |
| 1831 // dh. 100% = respiration == limit | |
| 197 | 1832 temp_tissue = pres_tissue[char_O_gtissue_no] + (pres_tissue+16)[char_O_gtissue_no]; |
| 1833 if( temp_tissue < pres_respiration ) | |
| 1834 gf = 0.0; | |
| 1835 else | |
| 1836 { | |
| 1837 gf = (temp_tissue - pres_respiration) | |
| 258 | 1838 / (temp_tissue - calc_lead_tissue_limit) |
| 197 | 1839 * 100.0; |
| 1840 if( gf > 255.0 ) gf = 255.0; | |
| 1841 if( gf < 0.0 ) gf = 0.0; | |
| 1842 } | |
| 1843 char_O_gradient_factor = (unsigned char)gf; | |
| 116 | 1844 |
| 1845 if (char_I_deco_model == 1) // calculate relative gradient factor | |
| 1846 { | |
| 197 | 1847 overlay float rgf; |
| 1848 | |
| 1849 if( low_depth == 0 ) | |
| 1850 rgf = GF_high; | |
| 1851 else | |
| 1852 { | |
| 241 | 1853 overlay float temp1 = low_depth * 0.09985; |
| 197 | 1854 overlay float temp2 = pres_respiration - pres_surface; |
| 186 | 1855 |
| 197 | 1856 if (temp2 <= 0) |
| 1857 rgf = GF_high; | |
| 1858 else if (temp2 >= temp1) | |
| 1859 rgf = GF_low; | |
| 1860 else | |
| 1861 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
| 1862 } | |
| 186 | 1863 |
| 197 | 1864 rgf = gf / rgf; // gf is already in percent |
| 1865 if( rgf < 0.0 ) rgf = 0.0; | |
| 1866 if( rgf > 255.0 ) rgf = 255.0; | |
| 1867 char_O_relative_gradient_GF = (unsigned char)rgf; | |
| 116 | 1868 } // calc relative gradient factor |
| 1869 else | |
| 1870 { | |
| 186 | 1871 char_O_relative_gradient_GF = char_O_gradient_factor; |
| 116 | 1872 } |
| 167 | 1873 } |
| 116 | 1874 |
| 167 | 1875 ////////////////////////////////////////////////////////////////////////////// |
| 1876 // deco_calc_desaturation_time | |
| 1877 // | |
| 116 | 1878 // FIXED N2_ratio |
| 1879 // unchanged in v.101 | |
| 233 | 1880 // Inputs: int_I_pres_surface, ppWVapour, char_I_desaturation_multiplier |
| 1881 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] | |
| 167 | 1882 // |
| 116 | 1883 void deco_calc_desaturation_time(void) |
| 1884 { | |
|
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1885 RESET_C_STACK |
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1886 |
| 233 | 1887 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 1888 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1889 | |
| 237 | 1890 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
| 233 | 1891 pres_surface = int_I_pres_surface * 0.001; |
| 236 | 1892 ppN2 = N2_ratio * (pres_surface - ppWVapour); |
| 126 | 1893 int_O_desaturation_time = 0; |
| 1894 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) | |
| 233 | 1895 |
| 126 | 1896 for (ci=0;ci<16;ci++) |
| 1897 { | |
| 251 | 1898 overlay unsigned short desat_time; // For a particular compartiment, in min. |
| 1899 overlay float temp1; | |
| 1900 overlay float temp2; | |
| 1901 overlay float temp3; | |
| 1902 overlay float temp4; | |
| 1903 | |
| 200 | 1904 overlay float var_N2_halftime = buhlmann_ht[ci]; |
| 1905 overlay float var_He_halftime = (buhlmann_ht+16)[ci]; | |
| 116 | 1906 |
| 126 | 1907 // saturation_time (for flight) and N2_saturation in multiples of halftime |
| 1908 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1909 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1910 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and noFly calculations | |
| 1911 // N2 | |
| 236 | 1912 temp1 = 1.05 * ppN2; |
| 126 | 1913 temp1 = temp1 - pres_tissue[ci]; |
| 236 | 1914 temp2 = ppN2 - pres_tissue[ci]; |
| 126 | 1915 if (temp2 >= 0.0) |
| 1916 { | |
| 233 | 1917 temp1 = 0.0; |
| 1918 temp2 = 0.0; | |
| 126 | 1919 } |
| 1920 else | |
| 1921 temp1 = temp1 / temp2; | |
| 251 | 1922 if( 0.0 < temp1 && temp1 < 1.0 ) |
| 126 | 1923 { |
| 1924 temp1 = log(1.0 - temp1); | |
| 1925 temp1 = temp1 / -0.6931; // temp1 is the multiples of half times necessary. | |
| 1926 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1927 // minus because log is negative | |
| 165 | 1928 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 |
| 252 | 1929 |
| 1930 // HERE ==> This assert fails during simulated dives, and should not.... | |
| 1931 assert( temp2 < 28800.0 ); // 480h !! | |
| 126 | 1932 } |
| 1933 else | |
| 1934 { | |
| 233 | 1935 temp1 = 0.0; |
| 1936 temp2 = 0.0; | |
| 126 | 1937 } |
| 116 | 1938 |
| 126 | 1939 // He |
| 167 | 1940 temp3 = 0.1 - (pres_tissue+16)[ci]; |
| 126 | 1941 if (temp3 >= 0.0) |
| 1942 { | |
| 233 | 1943 temp3 = 0.0; |
| 1944 temp4 = 0.0; | |
| 126 | 1945 } |
| 1946 else | |
| 167 | 1947 temp3 = -1.0 * temp3 / (pres_tissue+16)[ci]; |
| 251 | 1948 if( 0.0 < temp3 && temp3 < 1.0 ) |
| 126 | 1949 { |
| 1950 temp3 = log(1.0 - temp3); | |
| 1951 temp3 = temp3 / -0.6931; // temp1 is the multiples of half times necessary. | |
| 1952 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1953 // minus because log is negative | |
| 165 | 1954 temp4 = var_He_halftime * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
| 126 | 1955 } |
| 1956 else | |
| 1957 { | |
| 233 | 1958 temp3 = 0.0; |
| 1959 temp4 = 0.0; | |
| 126 | 1960 } |
| 116 | 1961 |
| 126 | 1962 // saturation_time (for flight) |
| 1963 if (temp4 > temp2) | |
| 203 | 1964 desat_time = (unsigned short)temp4; |
| 126 | 1965 else |
| 203 | 1966 desat_time = (unsigned short)temp2; |
| 252 | 1967 |
| 251 | 1968 if(desat_time > int_O_desaturation_time) |
| 1969 int_O_desaturation_time = desat_time; | |
| 116 | 1970 |
| 126 | 1971 // N2 saturation in multiples of halftime for display purposes |
| 1972 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1973 temp2 = temp2 + 80.0; // set center | |
| 1974 if (temp2 < 0.0) | |
| 1975 temp2 = 0.0; | |
| 1976 if (temp2 > 255.0) | |
| 1977 temp2 = 255.0; | |
| 1978 char_O_tissue_saturation[ci] = (char)temp2; | |
| 233 | 1979 |
| 126 | 1980 // He saturation in multiples of halftime for display purposes |
| 1981 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1982 temp4 = temp4 + 80.0; // set center | |
| 1983 if (temp4 < 0.0) | |
| 1984 temp4 = 0.0; | |
| 1985 if (temp4 > 255.0) | |
| 1986 temp4 = 255.0; | |
| 167 | 1987 (char_O_tissue_saturation+16)[ci] = (char)temp4; |
| 126 | 1988 } // for |
| 167 | 1989 } |
| 116 | 1990 |
| 167 | 1991 ////////////////////////////////////////////////////////////////////////////// |
| 1992 // calc_wo_deco_step_1_min | |
| 1993 // | |
| 116 | 1994 // FIXED N2 Ratio |
| 1995 // optimized in v.101 (...saturation_multiplier) | |
| 1996 // desaturation slowed down to 70,42% | |
| 167 | 1997 // |
| 1998 static void calc_wo_deco_step_1_min(void) | |
| 116 | 1999 { |
| 251 | 2000 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
| 2001 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
| 2002 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
| 2003 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 2004 | |
| 116 | 2005 if(flag_in_divemode) |
| 2006 { | |
| 2007 flag_in_divemode = 0; | |
| 2008 set_dbg_end_of_dive(); | |
| 2009 } | |
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2010 |
| 126 | 2011 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
| 233 | 2012 pres_respiration = int_I_pres_respiration * 0.001; // assembler code uses different digit system |
| 2013 pres_surface = int_I_pres_surface * 0.001; // the b"uhlmann formula using pres_surface does not use the N2_ratio | |
| 236 | 2014 ppN2 = N2_ratio * (pres_respiration - ppWVapour); // ppWVapour is the extra pressure in the body |
| 200 | 2015 ppHe = 0.0; |
| 126 | 2016 float_desaturation_multiplier = char_I_desaturation_multiplier / 142.0; // new in v.101 (70,42%/100.=142) |
| 197 | 2017 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
| 126 | 2018 |
| 192 | 2019 calc_tissue(1); // update the pressure in the 32 tissues in accordance with the new ambient pressure |
| 167 | 2020 |
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2021 clear_deco_table(); |
| 200 | 2022 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
| 126 | 2023 char_O_nullzeit = 0; |
| 168 | 2024 int_O_ascenttime = 0; |
| 126 | 2025 calc_gradient_factor(); |
| 167 | 2026 } |
| 126 | 2027 |
| 167 | 2028 ////////////////////////////////////////////////////////////////////////////// |
| 2029 ////////////////////////////////////////////////////////////////////////////// | |
| 2030 ////////////////////////////////// deco_hash ///////////////////////////////// | |
| 2031 ////////////////////////////////////////////////////////////////////////////// | |
| 2032 ////////////////////////////////////////////////////////////////////////////// | |
| 126 | 2033 |
| 184 | 2034 #ifndef CROSS_COMPILE |
| 116 | 2035 void deco_hash(void) |
| 2036 { | |
| 167 | 2037 overlay unsigned char md_i, md_j; // Loop index. |
| 2038 overlay unsigned char md_t; | |
| 2039 overlay unsigned char md_buffer[16]; | |
| 2040 overlay unsigned char md_temp; | |
| 203 | 2041 overlay unsigned short md_pointer; |
| 167 | 2042 |
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2043 RESET_C_STACK |
| 126 | 2044 |
| 2045 // init | |
| 164 | 2046 for(md_i=0;md_i<16;md_i++) |
| 126 | 2047 { |
| 2048 md_state[md_i] = 0; | |
| 164 | 2049 char_O_hash[md_i] = 0; |
| 126 | 2050 } // for md_i 16 |
| 116 | 2051 |
| 126 | 2052 _asm |
| 167 | 2053 movlw 0x01 // md_pi address. |
| 2054 movwf TBLPTRU,0 | |
| 2055 movlw 0x7E | |
| 2056 movwf TBLPTRH,0 | |
| 2057 movlw 0x00 | |
| 2058 movwf TBLPTRL,0 | |
| 126 | 2059 _endasm; |
| 165 | 2060 md_i = 0; |
| 2061 do { | |
| 126 | 2062 _asm |
| 2063 TBLRDPOSTINC | |
| 2064 movff TABLAT,md_temp | |
| 2065 _endasm | |
| 165 | 2066 md_pi_subst[md_i++] = md_temp; |
| 2067 } while( md_i != 0 ); | |
| 2068 | |
| 126 | 2069 _asm |
| 167 | 2070 movlw 0x00 |
| 2071 movwf TBLPTRU,0 | |
| 2072 movlw 0x00 | |
| 2073 movwf TBLPTRH,0 | |
| 2074 movlw 0x00 | |
| 2075 movwf TBLPTRL,0 | |
| 126 | 2076 _endasm |
| 167 | 2077 |
| 126 | 2078 // cycle buffers |
| 2079 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
| 2080 { | |
| 2081 md_t = 0; | |
| 2082 for (md_i=0;md_i<16;md_i++) | |
| 2083 { | |
| 2084 if(md_pointer == 9) | |
| 164 | 2085 md_temp = char_O_hash[md_i]; |
| 126 | 2086 else |
| 2087 { | |
| 2088 _asm | |
| 167 | 2089 TBLRDPOSTINC |
| 2090 movff TABLAT,md_temp | |
| 126 | 2091 _endasm |
| 2092 } // else | |
| 167 | 2093 |
| 2094 md_buffer[md_i] = md_temp; | |
| 186 | 2095 md_state[md_i+16] = md_temp; |
| 2096 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
| 126 | 2097 } // for md_i 16 |
| 2098 | |
| 2099 for (md_i=0;md_i<18;md_i++) | |
| 2100 { | |
| 2101 for (md_j=0;md_j<48;md_j++) | |
| 2102 { | |
| 167 | 2103 md_state[md_j] ^= md_pi_subst[md_t]; |
| 126 | 2104 md_t = md_state[md_j]; |
| 2105 } // for md_j 48 | |
| 2106 md_t = (unsigned char)(md_t+1); | |
| 2107 } // for md_i 18 | |
| 164 | 2108 md_t = char_O_hash[15]; |
| 126 | 2109 |
| 2110 for (md_i=0;md_i<16;md_i++) | |
| 2111 { | |
| 167 | 2112 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
| 164 | 2113 md_t = char_O_hash[md_i]; |
| 126 | 2114 } // for md_i 16 |
| 2115 } // for md_pointer | |
| 116 | 2116 } // void deco_hash(void) |
| 184 | 2117 #endif |
| 116 | 2118 |
| 167 | 2119 ////////////////////////////////////////////////////////////////////////////// |
| 2120 // deco_clear_CNS_fraction | |
| 2121 // | |
| 116 | 2122 // new in v.101 |
| 167 | 2123 // |
| 116 | 2124 void deco_clear_CNS_fraction(void) |
| 2125 { | |
|
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2126 RESET_C_STACK |
| 237 | 2127 |
| 126 | 2128 CNS_fraction = 0.0; |
| 2129 char_O_CNS_fraction = 0; | |
| 167 | 2130 } |
| 116 | 2131 |
| 167 | 2132 ////////////////////////////////////////////////////////////////////////////// |
| 2133 // deco_calc_CNS_fraction | |
| 2134 // | |
| 116 | 2135 // new in v.101 |
| 2136 // optimized in v.102 : with new variables char_I_actual_ppO2 and actual_ppO2 | |
| 167 | 2137 // |
| 116 | 2138 // Input: char_I_actual_ppO2 |
| 2139 // Output: char_O_CNS_fraction | |
| 2140 // Uses and Updates: CNS_fraction | |
| 2141 // Uses: acutal_ppO2 | |
| 167 | 2142 // |
| 116 | 2143 void deco_calc_CNS_fraction(void) |
| 2144 { | |
| 167 | 2145 overlay float actual_ppO2; |
| 126 | 2146 RESET_C_STACK |
| 167 | 2147 |
| 237 | 2148 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.5 ); |
| 2149 assert( char_I_actual_ppO2 > 15 ); | |
| 2150 | |
| 126 | 2151 actual_ppO2 = (float)char_I_actual_ppO2 / 100.0; |
| 116 | 2152 |
| 126 | 2153 if (char_I_actual_ppO2 < 50) |
| 2154 CNS_fraction = CNS_fraction;// no changes | |
| 2155 else if (char_I_actual_ppO2 < 60) | |
| 2156 CNS_fraction = 1/(-54000.0 * actual_ppO2 + 54000.0) + CNS_fraction; | |
| 2157 else if (char_I_actual_ppO2 < 70) | |
| 2158 CNS_fraction = 1/(-45000.0 * actual_ppO2 + 48600.0) + CNS_fraction; | |
| 2159 else if (char_I_actual_ppO2 < 80) | |
| 2160 CNS_fraction = 1/(-36000.0 * actual_ppO2 + 42300.0) + CNS_fraction; | |
| 2161 else if (char_I_actual_ppO2 < 90) | |
| 2162 CNS_fraction = 1/(-27000.0 * actual_ppO2 + 35100.0) + CNS_fraction; | |
| 2163 else if (char_I_actual_ppO2 < 110) | |
| 2164 CNS_fraction = 1/(-18000.0 * actual_ppO2 + 27000.0) + CNS_fraction; | |
| 2165 else if (char_I_actual_ppO2 < 150) | |
| 2166 CNS_fraction = 1/(-9000.0 * actual_ppO2 + 17100.0) + CNS_fraction; | |
| 2167 else if (char_I_actual_ppO2 < 160) | |
| 2168 CNS_fraction = 1/(-22500.0 * actual_ppO2 + 37350.0) + CNS_fraction; | |
| 2169 else if (char_I_actual_ppO2 < 165) | |
| 2170 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 | |
| 2171 else if (char_I_actual_ppO2 < 170) | |
| 2172 CNS_fraction = 0.00102 + CNS_fraction; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 | |
| 2173 else if (char_I_actual_ppO2 < 175) | |
| 2174 CNS_fraction = 0.00136 + CNS_fraction; | |
| 2175 else if (char_I_actual_ppO2 < 180) | |
| 2176 CNS_fraction = 0.00180 + CNS_fraction; | |
| 2177 else if (char_I_actual_ppO2 < 185) | |
| 2178 CNS_fraction = 0.00237 + CNS_fraction; | |
| 2179 else if (char_I_actual_ppO2 < 190) | |
| 2180 CNS_fraction = 0.00310 + CNS_fraction; | |
| 2181 else if (char_I_actual_ppO2 < 195) | |
| 2182 CNS_fraction = 0.00401 + CNS_fraction; | |
| 2183 else if (char_I_actual_ppO2 < 200) | |
| 2184 CNS_fraction = 0.00517 + CNS_fraction; | |
| 2185 else if (char_I_actual_ppO2 < 230) | |
| 2186 CNS_fraction = 0.0209 + CNS_fraction; | |
| 2187 else | |
| 2188 CNS_fraction = 0.0482 + CNS_fraction; // value for 2.5 | |
| 116 | 2189 |
| 126 | 2190 if (CNS_fraction > 2.5) |
| 2191 CNS_fraction = 2.5; | |
| 2192 if (CNS_fraction < 0.0) | |
| 2193 CNS_fraction = 0.0; | |
| 2194 | |
| 2195 char_O_CNS_fraction = (char)((CNS_fraction + 0.005)* 100.0); | |
| 167 | 2196 } |
| 116 | 2197 |
| 167 | 2198 ////////////////////////////////////////////////////////////////////////////// |
| 2199 // deco_calc_CNS_decrease_15min | |
| 2200 // | |
| 116 | 2201 // new in v.101 |
| 167 | 2202 // |
| 116 | 2203 // calculates the half time of 90 minutes in 6 steps of 15 min |
| 200 | 2204 // (Used in sleepmode, for low battery mode). |
| 167 | 2205 // |
| 116 | 2206 // Output: char_O_CNS_fraction |
| 2207 // Uses and Updates: CNS_fraction | |
| 167 | 2208 // |
| 116 | 2209 void deco_calc_CNS_decrease_15min(void) |
| 2210 { | |
| 237 | 2211 RESET_C_STACK |
| 2212 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.5 ); | |
| 2213 | |
| 126 | 2214 CNS_fraction = 0.890899 * CNS_fraction; |
| 167 | 2215 char_O_CNS_fraction = (char)(CNS_fraction * 100.0 + 0.5); |
| 2216 } | |
| 116 | 2217 |
| 167 | 2218 ////////////////////////////////////////////////////////////////////////////// |
| 2219 // deco_calc_percentage | |
| 2220 // | |
| 116 | 2221 // new in v.101 |
| 167 | 2222 // |
| 116 | 2223 // calculates int_I_temp * char_I_temp / 100 |
| 2224 // output is int_I_temp | |
| 200 | 2225 // |
| 2226 // Used to compute NoFly remaining time. | |
|
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2227 // |
| 116 | 2228 void deco_calc_percentage(void) |
| 2229 { | |
|
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2230 RESET_C_STACK |
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2231 |
| 237 | 2232 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
| 2233 assert( 0 <= int_I_temp && int_I_temp < 2880 ); // Less than 48h... | |
| 2234 | |
|
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2235 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
| 237 | 2236 |
| 2237 assert( int_I_temp < 1440 ); // Less than 24h... | |
|
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2238 } |
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2239 |
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2240 |
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2241 ////////////////////////////////////////////////////////////////////////////// |
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2242 // deco_gas_volumes |
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2243 // |
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2244 // new in v.111 |
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2245 // |
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2246 // calculates volumes for each gas. |
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2247 // |
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2248 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
|
240
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2249 // Gas list. |
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2250 // char_I_first_gas is the bottom gas. |
|
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2251 // decoplan (char_O_deco_depth, char_O_deco_time). |
|
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2252 // CF#54 == TRUE if shallowest stop first. |
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2253 // CF#56 == bottom deci-liters/minutes (0.5 .. 50.0) |
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2254 // CF#57 == deco deci-liters/minutes (0.5 .. 50.0). |
| 224 | 2255 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
|
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2256 // |
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2257 void deco_gas_volumes(void) |
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2258 { |
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2259 overlay float volumes[5]; |
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2260 overlay float ascent_usage; |
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2261 overlay unsigned char i, deepest_first; |
| 241 | 2262 overlay unsigned char gas; |
|
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2263 RESET_C_STACK |
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2264 |
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2265 //---- initialize with bottom consumption -------------------------------- |
|
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2266 for(i=0; i<5; ++i) // Nothing yet... |
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2267 volumes[i] = 0.0; |
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2268 |
| 241 | 2269 assert(1 <= char_I_first_gas && char_I_first_gas <= 5); |
| 2270 gas = char_I_first_gas - 1; | |
| 2271 | |
| 2272 volumes[gas] | |
|
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2273 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. |
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2274 * char_I_bottom_time // in minutes. |
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2275 * read_custom_function(56) // In deci-liter/minutes. |
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2276 * 0.1; // deci-liters --> liters. |
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2277 |
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2278 //---- Ascent usage ------------------------------------------------------ |
|
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2279 |
|
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2280 deepest_first = read_custom_function(54) == 0; |
|
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2281 ascent_usage = read_custom_function(57) * 0.1; // In liter/minutes. |
|
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2282 |
| 224 | 2283 // Usage up to the first stop: |
| 2284 // - computed at MAX depth (easier, safer), | |
|
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2285 // - with an ascent speed of 10m/min. |
| 224 | 2286 // - with ascent litter / minutes. |
|
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2287 // - still using bottom gas: |
| 241 | 2288 volumes[gas] |
|
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2289 += (char_I_bottom_depth*0.1 + 1.0) // Depth -> bar |
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2290 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 // ascent time (min) |
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2291 * ascent_usage; // Consumption ( xxx / min @ 1 bar) |
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2292 |
|
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2293 for(i=0; i<32; ++i) |
|
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2294 { |
| 241 | 2295 overlay unsigned char j; |
|
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2296 overlay unsigned char depth, time, ascent; |
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2297 |
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2298 // Manage stops in reverse order (CF#54) |
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2299 if( deepest_first ) |
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2300 { |
| 241 | 2301 time = char_O_deco_time[i]; |
|
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2302 if( time == 0 ) break; // End of table: done. |
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2303 |
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2304 ascent = depth = char_O_deco_depth[i]; |
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2305 if( i < 31 ) |
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2306 ascent -= char_O_deco_depth[i+1]; |
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2307 } |
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2308 else |
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2309 { |
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2310 time = char_O_deco_time[31-i]; |
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2311 if( time == 0 ) continue; // not yet: still searh table. |
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2312 |
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2313 ascent = depth = char_O_deco_depth[31-i]; |
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2314 if( i < 31 ) |
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2315 ascent -= char_O_deco_depth[30-i]; |
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2316 } |
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2317 |
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2318 // Gas switch depth ? |
| 241 | 2319 for(j=0; j<5; ++j) |
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2320 { |
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2321 if( depth <= char_I_deco_gas_change[j] ) |
| 241 | 2322 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
| 224 | 2323 gas = j; |
|
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2324 } |
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2325 |
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2326 // usage during stop: |
| 224 | 2327 // Note: because first gas is not in there, increment gas+1 |
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2328 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
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2329 * time // in minutes. |
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2330 * ascent_usage // in xxx / min @ 1bar. |
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2331 // Plus usage during ascent to the next stop, at 10m/min. |
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2332 + (depth*0.1 + 1.0) |
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2333 * ascent*0.1 // meter --> min |
| 225 | 2334 * ascent_usage; |
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2335 } |
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2336 |
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2337 //---- convert results for the ASM interface ----------------------------- |
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2338 for(i=0; i<5; ++i) |
| 224 | 2339 if( volumes[i] > 6553.4 ) |
| 2340 int_O_gas_volumes[i] = 65535; | |
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2341 else |
| 224 | 2342 int_O_gas_volumes[i] = (unsigned short)(volumes[i]*10.0 + 0.5); |
| 116 | 2343 } |
| 2344 | |
| 167 | 2345 ////////////////////////////////////////////////////////////////////////////// |
| 2346 | |
| 116 | 2347 void deco_push_tissues_to_vault(void) |
| 2348 { | |
| 167 | 2349 overlay unsigned char x; |
|
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2350 RESET_C_STACK |
| 167 | 2351 |
| 116 | 2352 cns_vault = CNS_fraction; |
| 167 | 2353 for (x=0;x<32;x++) |
| 2354 pres_tissue_vault[x] = pres_tissue[x]; | |
| 116 | 2355 } |
| 167 | 2356 |
| 116 | 2357 void deco_pull_tissues_from_vault(void) |
| 2358 { | |
| 167 | 2359 overlay unsigned char x; |
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2360 RESET_C_STACK |
| 167 | 2361 |
| 116 | 2362 CNS_fraction = cns_vault; |
| 167 | 2363 for (x=0;x<32;x++) |
| 2364 pres_tissue[x] = pres_tissue_vault[x]; | |
| 116 | 2365 } |
| 2366 | |
| 167 | 2367 ////////////////////////////////////////////////////////////////////////////// |
| 2368 // | |
| 184 | 2369 #ifndef CROSS_COMPILE |
| 2370 void main() {} | |
| 2371 #endif |