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annotate Discovery/Src/buehlmann.c @ 80:cc2bb7bb8456
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| author | heinrichsweikamp |
|---|---|
| date | Sat, 06 Oct 2018 15:02:11 +0200 |
| parents | 8f8ea3a32e82 |
| children | b7689d9e888a |
| rev | line source |
|---|---|
|
51
8f8ea3a32e82
Resolved warnings pointing to possible invalid memory access
Ideenmodellierer
parents:
38
diff
changeset
|
1 /* getrennte Gase f�r die verschiedenen Modi |
|
8f8ea3a32e82
Resolved warnings pointing to possible invalid memory access
Ideenmodellierer
parents:
38
diff
changeset
|
2 um Gaswechsel Eintr�ge zu vereinfachen |
| 38 | 3 das heisst: |
| 4 oc == bailout in cc mode | |
| 5 */ | |
| 6 | |
| 7 /* Konvention: | |
| 8 float extExample_variable_can_be_used_with_extern; | |
| 9 */ | |
| 10 | |
| 11 #include <string.h> | |
| 12 //#include "arm_math.h" | |
| 13 #include <math.h> | |
| 14 #include <stdbool.h> | |
| 15 #include "buehlmann.h" | |
| 16 #include "decom.h" | |
| 17 | |
| 18 | |
| 19 extern const float helium_time_constant[16]; | |
| 20 extern const float nitrogen_time_constant[16]; | |
| 21 | |
| 22 extern const float buehlmann_N2_a[]; | |
| 23 extern const float buehlmann_N2_b[]; | |
| 24 extern const float buehlmann_He_a[]; | |
| 25 extern const float buehlmann_He_b[]; | |
| 26 | |
| 27 | |
| 28 /* | |
| 29 typedef struct | |
| 30 { | |
| 31 float *pointer_array_tissue_nitrogen_bar; | |
| 32 float *pointer_array_tissue_helium_bar; | |
| 33 char gf_value; | |
| 34 | |
| 35 float output_ceiling_ambient_bar_or_input; | |
| 36 _Bool output_ceiling_tolerated_if_ceiling_used_as_input; | |
| 37 } tissue_test_tolerance_struct; | |
| 38 */ | |
| 39 typedef struct | |
| 40 { | |
| 41 float depth; | |
| 42 int id; | |
| 43 } SStop; | |
| 44 | |
| 45 #define DECO_STOPS_MAX_TTS_CALCULATON_IN_SECONDS 59940 // 999 minuten; before: 18000 // 5(h) * 60(min) * 60 sec = 18000 sec | |
| 46 #define DECO_STOPS_MAX_TTS_FOR_EVERY_SECOND_CALC_IN_SECONDS 7200 | |
| 47 #define NINETY_NINE_MINUTES_IN_SECONDS 59940 | |
| 48 | |
| 49 # define PRESSURE_TEN_METER 1.0f | |
| 50 # define PRESSURE_THREE_METER 0.333334f | |
| 51 # define PRESSURE_150_CM 0.15f | |
| 52 # define PRESSURE_HALF_METER 0.05f | |
| 53 /* | |
| 54 # define PRESSURE_150_CM_MBAR 150 | |
| 55 # define PRESSURE_TWO_M_MBAR 200 | |
| 56 # define PRESSURE_FIVE_M_MBAR 500 | |
| 57 # define PRESSURE_TEN_M_MBAR 1000 | |
| 58 # define PRESSURE_120_METER 12.0 | |
| 59 */ | |
| 60 /* | |
| 61 _____________________________________________________________ | |
| 62 */ | |
| 63 | |
| 64 | |
| 65 void buehlmann_backup_and_restore(_Bool backup_restore_otherwise); | |
| 66 float tissue_tolerance(void); | |
| 67 void ambient_bar_to_deco_stop_depth_bar(float ceiling); | |
| 68 int ascend_with_all_gaschanges(float pressure_decrease); | |
| 69 float next_stop_depth_input_is_actual_stop_id(int actual_id); | |
| 70 float get_gf_at_pressure(float pressure); | |
| 71 void buehlmann_calc_ndl(void); | |
| 72 _Bool dive1_check_deco(void); | |
| 73 uint8_t buehlmann_tissue_test_tolerance(float depth_in_bar_absolute); | |
| 74 | |
| 75 /* | |
| 76 _____________________________________________________________ | |
| 77 */ | |
| 78 | |
| 79 SDecoinfo gDecotable; | |
| 80 float gSurface_pressure_bar; | |
| 81 | |
| 82 float gPressure; | |
| 83 int gGas_id; | |
| 84 float gTTS; | |
| 85 float gTissue_nitrogen_bar[16]; | |
| 86 float gTissue_helium_bar[16]; | |
| 87 float gGF_value; | |
| 88 float gCNS; | |
| 89 //float gMax_ceiling_bar = 0; | |
| 90 int gNDL; | |
| 91 | |
| 92 | |
| 93 //SLifeData *pLifeData; | |
| 94 SDiveSettings *pBuDiveSettings; | |
| 95 SDecoinfo* pDecolistBuehlmann; | |
| 96 //signed char gGaschange_decreasing_depth_gas_id[BUEHLMANN_STRUCT_MAX_GASES]; | |
| 97 float gGF_low_depth_bar; | |
| 98 SStop gStop; | |
| 99 | |
| 100 void buehlmann_init(void) | |
| 101 { | |
| 102 //gMax_ceiling_bar = 0; | |
| 103 } | |
| 104 | |
| 105 void buehlmann_backup_and_restore(_Bool backup_restore_otherwise) | |
| 106 { | |
| 107 static float pressure; | |
| 108 static float gas_id; | |
| 109 static float tts; | |
| 110 static float tissue_nitrogen_bar[16]; | |
| 111 static float tissue_helium_bar[16]; | |
| 112 static float gf_value; | |
| 113 static int ndl; | |
| 114 static float cns; | |
| 115 | |
| 116 if(backup_restore_otherwise) | |
| 117 { | |
| 118 pressure = gPressure; | |
| 119 gas_id = gGas_id; | |
| 120 tts = gTTS; | |
| 121 gf_value = gGF_value; | |
| 122 ndl = gNDL; | |
| 123 cns = gCNS; | |
| 124 memcpy(tissue_nitrogen_bar, gTissue_nitrogen_bar, (4*16)); | |
| 125 memcpy(tissue_helium_bar, gTissue_helium_bar, (4*16)); | |
| 126 } | |
| 127 else | |
| 128 { | |
| 129 gPressure = pressure; | |
| 130 gGas_id = gas_id; | |
| 131 gTTS = tts; | |
| 132 gGF_value = gf_value; | |
| 133 gNDL = ndl; | |
| 134 gCNS = cns; | |
| 135 memcpy(gTissue_nitrogen_bar, tissue_nitrogen_bar, (4*16)); | |
| 136 memcpy(gTissue_helium_bar, tissue_helium_bar, (4*16)); | |
| 137 } | |
| 138 | |
| 139 } | |
| 140 /*void buehlmann__test__saturate_tissues(SBuehlmann *pInput, int seconds) | |
| 141 { | |
| 142 pBuehlmann = pInput; | |
| 143 pInput->dive_time_seconds += seconds; | |
| 144 // internal copying | |
| 145 gSurface_pressure_bar = pBuehlmann->pressure_surface_bar; | |
| 146 | |
| 147 gPressure = pBuehlmann->pressure_ambient_bar; | |
| 148 gGas_id = pBuehlmann->actual_gas_id; | |
| 149 memcpy(gTissue_nitrogen_bar, pBuehlmann->tissue_nitrogen_bar, (4*16)); | |
| 150 memcpy(gTissue_helium_bar, pBuehlmann->tissue_helium_bar, (4*16)); | |
| 151 | |
| 152 tissues_exposure_at_gPressure_seconds(seconds); | |
| 153 | |
| 154 memcpy(pBuehlmann->tissue_nitrogen_bar, gTissue_nitrogen_bar, (4*16)); | |
| 155 memcpy(pBuehlmann->tissue_helium_bar, gTissue_helium_bar, (4*16)); | |
| 156 }*/ | |
| 157 | |
| 158 float buehlmann_get_gCNS(void) | |
| 159 { | |
| 160 return gCNS; | |
| 161 } | |
| 162 | |
| 163 void buehlmann_calc_deco(SLifeData* pLifeData, SDiveSettings * pDiveSettings, SDecoinfo * pDecoInfo) | |
| 164 { | |
| 165 float ceiling; | |
| 166 int ascend_time; | |
| 167 int tts_seconds; | |
| 168 float pressure_delta; | |
| 169 float next_depth; | |
| 170 _Bool deco_reached = false; | |
| 171 // tissue_test_tolerance_struct tolerance_data; | |
| 172 unsigned short *stoplist; | |
| 173 int i; | |
| 174 | |
| 175 // decom_CreateGasChangeList(pDiveSettings, pLifeData); | |
| 176 | |
| 177 gCNS = 0; | |
| 178 pDecoInfo->output_time_to_surface_seconds = 0; | |
| 179 pDecoInfo->output_ndl_seconds = 0; | |
| 180 for(int i=0;i<DECOINFO_STRUCT_MAX_STOPS;i++) | |
| 181 { | |
| 182 pDecoInfo->output_stop_length_seconds[i] = 0; | |
| 183 } | |
| 184 /* make input available global*/ | |
| 185 pBuDiveSettings = pDiveSettings; | |
| 186 | |
| 187 pDecolistBuehlmann = pDecoInfo; | |
| 188 /* internal copying */ | |
| 189 gSurface_pressure_bar = pLifeData->pressure_surface_bar; | |
| 190 | |
| 191 gPressure = pLifeData->pressure_ambient_bar; | |
| 192 gGas_id = 0; | |
| 193 memcpy(gTissue_nitrogen_bar, pLifeData->tissue_nitrogen_bar, (4*16)); | |
| 194 memcpy(gTissue_helium_bar, pLifeData->tissue_helium_bar, (4*16)); | |
| 195 gGF_value = ((float)pBuDiveSettings->gf_low) / 100.0f; | |
| 196 | |
| 197 // | |
| 198 memcpy(&gDecotable, pDecolistBuehlmann, sizeof(SDecoinfo)); | |
| 199 stoplist = gDecotable.output_stop_length_seconds; | |
| 200 | |
| 201 | |
| 202 if(pLifeData->dive_time_seconds < 60) | |
| 203 return; | |
| 204 /* coupling */ | |
| 205 | |
| 206 /* functions */ | |
| 207 | |
| 208 // clean stop list | |
| 209 for(i = 0; i < DECOINFO_STRUCT_MAX_STOPS; i++) | |
| 210 stoplist[i] = 0; | |
| 211 gTTS = 0; | |
| 212 gNDL = 0; | |
| 213 | |
| 214 if(pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero >= (gPressure - PRESSURE_150_CM)) | |
| 215 { | |
| 216 deco_reached = true; | |
| 217 } | |
| 218 | |
| 219 | |
| 220 //ascend_with_all_gaschanges(gPressure - gSurface_pressure_bar); | |
| 221 gGF_value = ((float)pBuDiveSettings->gf_high) / 100.0f; | |
| 222 //iling = tissue_tolerance(); | |
| 223 // includes backup for gGF_value | |
| 224 // NDL | |
| 225 buehlmann_backup_and_restore(true); // includes backup for gGF_value | |
| 226 if(!dive1_check_deco() ) | |
| 227 { | |
| 228 buehlmann_backup_and_restore(false); | |
| 229 // no deco | |
| 230 pDecolistBuehlmann->output_time_to_surface_seconds = 0; | |
| 231 for(i = 0; i < DECOINFO_STRUCT_MAX_STOPS; i++) | |
| 232 pDecolistBuehlmann->output_stop_length_seconds[i] = 0; | |
| 233 // calc NDL | |
| 234 buehlmann_calc_ndl(); | |
| 235 pDecolistBuehlmann->output_ndl_seconds = gNDL; | |
| 236 return; | |
| 237 } | |
| 238 buehlmann_backup_and_restore(false); | |
| 239 pDecolistBuehlmann->output_ndl_seconds = 0; | |
| 240 | |
| 241 gGF_value = get_gf_at_pressure(gPressure); | |
| 242 //current ceiling at actual position | |
| 243 ceiling = tissue_tolerance(); | |
| 244 //if(ceiling < pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero) | |
| 245 //ambient_bar_to_deco_stop_depth_bar(pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero); | |
| 246 //else | |
| 247 ambient_bar_to_deco_stop_depth_bar(ceiling); | |
| 248 | |
| 249 // set the base for all upcoming parameters | |
| 250 ceiling = gStop.depth + gSurface_pressure_bar; | |
| 251 tts_seconds = 0; | |
| 252 | |
| 253 // modify parameters if there is ascend or parameter fine adjustment | |
| 254 if(ceiling < (gPressure - PRESSURE_150_CM)) // more than 1.5 meter below ceiling | |
| 255 { | |
| 256 // ascend within 10 mtr to GF_low // speed 12 mtr/min -> 50 sec / 10 mtr; 15 sec / 3 mtr. | |
| 257 if(ceiling < (gPressure - PRESSURE_TEN_METER) ) | |
| 258 { do { | |
| 259 ascend_time = ascend_with_all_gaschanges(PRESSURE_TEN_METER); | |
| 260 tts_seconds += ascend_time; | |
| 261 ceiling = tissue_tolerance(); | |
| 262 if(tts_seconds > DECO_STOPS_MAX_TTS_CALCULATON_IN_SECONDS) | |
| 263 { | |
| 264 /* pInput == pBuehlmann */ | |
| 265 pDecolistBuehlmann->output_time_to_surface_seconds = NINETY_NINE_MINUTES_IN_SECONDS; | |
| 266 return;// NINETY_NINE_MINUTES_IN_SECONDS; | |
| 267 } | |
| 268 } while ((ascend_time > 0 ) && ((gPressure - PRESSURE_TEN_METER ) > gSurface_pressure_bar) && (ceiling < (gPressure - PRESSURE_TEN_METER))); | |
| 269 } | |
| 270 do { | |
| 271 buehlmann_backup_and_restore(true); | |
| 272 ascend_time = ascend_with_all_gaschanges(PRESSURE_THREE_METER); | |
| 273 tts_seconds += ascend_time; | |
| 274 ceiling = tissue_tolerance(); | |
| 275 if(tts_seconds > DECO_STOPS_MAX_TTS_CALCULATON_IN_SECONDS) | |
| 276 { | |
| 277 /* pInput == pBuehlmann */ | |
| 278 pDecolistBuehlmann->output_time_to_surface_seconds = NINETY_NINE_MINUTES_IN_SECONDS; | |
| 279 return;// NINETY_NINE_MINUTES_IN_SECONDS; | |
| 280 } | |
| 281 ambient_bar_to_deco_stop_depth_bar(ceiling); | |
| 282 } while ((ascend_time > 0 ) && ((gStop.depth + gSurface_pressure_bar) < gPressure)); | |
| 283 | |
| 284 if(gStop.depth + gSurface_pressure_bar > gPressure) | |
| 285 { | |
| 286 gPressure += PRESSURE_THREE_METER; | |
| 287 buehlmann_backup_and_restore(false); | |
| 288 tts_seconds -= ascend_time; | |
| 289 } | |
| 290 // calculate first stop based on tissue saturation within 10 meters of stop | |
| 291 //ambient_bar_to_deco_stop_depth_bar(ceiling); | |
| 292 } | |
| 293 else | |
| 294 { | |
| 295 // initial values, upper code might not be executed (is within 150 cm) | |
| 296 } | |
| 297 | |
| 298 | |
| 299 | |
| 300 | |
| 301 if(ceiling > gSurface_pressure_bar) | |
| 302 { | |
| 303 | |
| 304 ceiling = gStop.depth + gSurface_pressure_bar; | |
| 305 // ascend the last meters to first stop (especially consider any gas changes around) | |
| 306 pressure_delta = gPressure - ceiling; | |
| 307 ascend_time = (int)ceil(pressure_delta * 50.0f); | |
| 308 tts_seconds += ascend_with_all_gaschanges(pressure_delta); | |
| 309 } | |
| 310 // NDL check | |
| 311 if(ceiling <= gSurface_pressure_bar) | |
| 312 { | |
| 313 /* pInput == pBuehlmann same pointer*/ | |
| 314 // NDL with GF_low | |
| 315 pDecolistBuehlmann->output_time_to_surface_seconds = 0; | |
| 316 return; | |
| 317 } | |
| 318 if(ceiling >pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero) | |
| 319 pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero = ceiling; | |
| 320 | |
| 321 // calc gf loop | |
| 322 if(deco_reached) | |
| 323 gGF_low_depth_bar = pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero - gSurface_pressure_bar; | |
| 324 else | |
| 325 gGF_low_depth_bar = ceiling - gSurface_pressure_bar; | |
| 326 | |
| 327 while(gStop.depth > 0) | |
| 328 { | |
| 329 do | |
| 330 { | |
| 331 next_depth = next_stop_depth_input_is_actual_stop_id(gStop.id); | |
| 332 gGF_value = get_gf_at_pressure(next_depth + gSurface_pressure_bar); | |
| 333 buehlmann_backup_and_restore(true); | |
| 334 ascend_time = ascend_with_all_gaschanges(gStop.depth - next_depth); | |
| 335 ceiling = tissue_tolerance(); | |
| 336 /* pre check actual limit */ | |
| 337 if(gDecotable.output_stop_length_seconds[gStop.id] >= 999*60) | |
| 338 { | |
| 339 tts_seconds -= 999*60 - gDecotable.output_stop_length_seconds[gStop.id]; | |
| 340 gDecotable.output_stop_length_seconds[gStop.id] = 999*60; | |
| 341 } | |
| 342 else | |
| 343 /* more deco on the actual depth */ | |
| 344 if(ceiling > next_depth + gSurface_pressure_bar) | |
| 345 { | |
| 346 next_depth = -1; | |
| 347 buehlmann_backup_and_restore(false); | |
| 348 decom_tissues_exposure2(10, &pBuDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar); // some seconds at least at each stop | |
| 349 decom_oxygen_calculate_cns_exposure(10, &pBuDiveSettings->decogaslist[gGas_id], gPressure, &gCNS); | |
| 350 gDecotable.output_stop_length_seconds[gStop.id] += 10; | |
| 351 tts_seconds += 10; | |
| 352 } | |
| 353 } while(next_depth == -1); | |
| 354 tts_seconds += ascend_time; | |
| 355 gStop.depth = next_depth; | |
| 356 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++) | |
| 357 { | |
| 358 if(pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0) | |
| 359 break; | |
| 360 float pressureChange = ((float)pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero) / 10; | |
| 361 if(gStop.depth <= pressureChange + 0.00001f) | |
| 362 { | |
| 363 gGas_id = i; | |
| 364 } | |
| 365 else | |
| 366 { | |
| 367 break; | |
| 368 } | |
| 369 } | |
| 370 gStop.id--; | |
| 371 } | |
| 372 | |
| 373 gDecotable.output_time_to_surface_seconds = tts_seconds; | |
| 374 memcpy(pDecolistBuehlmann, &gDecotable, sizeof(SDecoinfo)); | |
| 375 } | |
| 376 | |
| 377 | |
| 378 float tissue_tolerance(void) | |
| 379 { | |
| 380 float tissue_inertgas_saturation; | |
| 381 float inertgas_a; | |
| 382 float inertgas_b; | |
| 383 float ceiling; | |
| 384 float global_ceiling; | |
| 385 int ci; | |
| 386 | |
| 387 global_ceiling = -1; | |
| 388 | |
| 389 for (ci = 0; ci < 16; ci++) | |
| 390 { | |
| 391 if(gTissue_helium_bar[ci] == 0) | |
| 392 { | |
| 393 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci]; | |
| 394 // | |
| 395 inertgas_a = buehlmann_N2_a[ci]; | |
| 396 inertgas_b = buehlmann_N2_b[ci]; | |
| 397 } | |
| 398 else | |
| 399 { | |
| 400 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci]; | |
| 401 // | |
| 402 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 403 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 404 } | |
| 405 // | |
| 406 ceiling = (inertgas_b * ( tissue_inertgas_saturation - gGF_value * inertgas_a ) ) / (gGF_value - (inertgas_b * gGF_value) + inertgas_b); | |
| 407 if(ceiling > global_ceiling) | |
| 408 global_ceiling = ceiling; | |
| 409 } | |
| 410 return global_ceiling; | |
| 411 } | |
| 412 | |
| 413 // hw 161121 for relative gradient | |
| 414 float tissue_tolerance_without_gf_correction(float *tissue_inertgas_saturation_output) | |
| 415 { | |
| 416 float tissue_inertgas_saturation; | |
| 417 float inertgas_a; | |
| 418 float inertgas_b; | |
| 419 float ceiling; | |
| 420 float global_ceiling; | |
| 421 int ci; | |
| 422 | |
| 423 global_ceiling = -1; | |
| 424 | |
| 425 for (ci = 0; ci < 16; ci++) | |
| 426 { | |
| 427 if(gTissue_helium_bar[ci] == 0) | |
| 428 { | |
| 429 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci]; | |
| 430 // | |
| 431 inertgas_a = buehlmann_N2_a[ci]; | |
| 432 inertgas_b = buehlmann_N2_b[ci]; | |
| 433 } | |
| 434 else | |
| 435 { | |
| 436 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci]; | |
| 437 // | |
| 438 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 439 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 440 } | |
| 441 // | |
| 442 ceiling = inertgas_b * ( tissue_inertgas_saturation - inertgas_a ); | |
| 443 if(ceiling > global_ceiling) | |
| 444 { | |
| 445 global_ceiling = ceiling; | |
| 446 if(tissue_inertgas_saturation_output) | |
| 447 { | |
| 448 *tissue_inertgas_saturation_output = tissue_inertgas_saturation; | |
| 449 } | |
| 450 } | |
| 451 } | |
| 452 return global_ceiling; | |
| 453 } | |
| 454 | |
| 455 | |
| 456 uint8_t buehlmann_tissue_test_tolerance(float depth_in_bar_absolute) | |
| 457 { | |
| 458 float tissue_inertgas_saturation; | |
| 459 float inertgas_a; | |
| 460 float inertgas_b; | |
| 461 float inertgas_tolerance; | |
| 462 float gf_minus_1; | |
| 463 | |
| 464 gf_minus_1 = gGF_value - 1.0f; | |
| 465 | |
| 466 for (int ci = 0; ci < 16; ci++) | |
| 467 { | |
| 468 if(gTissue_helium_bar[ci] == 0) | |
| 469 { | |
| 470 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci]; | |
| 471 // | |
| 472 inertgas_a = buehlmann_N2_a[ci]; | |
| 473 inertgas_b = buehlmann_N2_b[ci]; | |
| 474 } | |
| 475 else | |
| 476 { | |
| 477 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci]; | |
| 478 // | |
| 479 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 480 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 481 } | |
| 482 // | |
| 483 inertgas_tolerance = ( (gGF_value / inertgas_b - gf_minus_1) * depth_in_bar_absolute ) + ( gGF_value * inertgas_a ); | |
| 484 // | |
| 485 if(inertgas_tolerance < tissue_inertgas_saturation) | |
| 486 return 0; | |
| 487 } | |
| 488 return 1; | |
| 489 } | |
| 490 | |
| 491 | |
| 492 void ambient_bar_to_deco_stop_depth_bar(float ceiling) | |
| 493 { | |
| 494 int i; | |
| 495 | |
| 496 ceiling -= gSurface_pressure_bar; | |
| 497 | |
| 498 if(ceiling <= 0) | |
| 499 { | |
| 500 gStop.depth = pBuDiveSettings->last_stop_depth_bar; | |
| 501 gStop.id = 0; | |
| 502 return; | |
| 503 } | |
| 504 | |
| 505 | |
| 506 //for(int i = 1; i < 10; i++) | |
| 507 | |
| 508 if((ceiling - pBuDiveSettings->last_stop_depth_bar) <= 0) | |
| 509 { | |
| 510 gStop.depth = pBuDiveSettings->last_stop_depth_bar; | |
| 511 gStop.id = 0; | |
| 512 return; | |
| 513 } | |
| 514 | |
| 515 gStop.depth = pBuDiveSettings->input_second_to_last_stop_depth_bar; | |
| 516 gStop.id = 1; | |
| 517 ceiling -= pBuDiveSettings->input_second_to_last_stop_depth_bar; | |
| 518 | |
| 519 if(ceiling <= 0) | |
| 520 return; | |
| 521 | |
| 522 for(i = 1; i < (DECOINFO_STRUCT_MAX_STOPS - 2); i++) | |
| 523 { | |
| 524 ceiling -= pBuDiveSettings->input_next_stop_increment_depth_bar; | |
| 525 if(ceiling <= 0) | |
| 526 break; | |
| 527 } | |
| 528 gStop.depth += i * pBuDiveSettings->input_next_stop_increment_depth_bar; | |
| 529 gStop.id += i; | |
| 530 return; | |
| 531 } | |
| 532 | |
| 533 float next_stop_depth_input_is_actual_stop_id(int actual_id) | |
| 534 { | |
| 535 if(actual_id == 0) | |
| 536 return 0; | |
| 537 | |
| 538 if(actual_id == 1) | |
| 539 return pBuDiveSettings->last_stop_depth_bar; | |
| 540 | |
| 541 actual_id -= 2; | |
| 542 return pBuDiveSettings->input_second_to_last_stop_depth_bar + (actual_id * pBuDiveSettings->input_next_stop_increment_depth_bar); | |
| 543 } | |
| 544 | |
| 545 int ascend_with_all_gaschanges(float pressure_decrease) | |
| 546 { | |
| 547 float pressureTop, pressureTop_tmp, pressureBottom, pressureChange, ascendrate_in_seconds_for_one_bar, pressure_difference; | |
|
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Resolved warnings pointing to possible invalid memory access
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changeset
|
548 int time_for_ascend = 0; |
| 38 | 549 int seconds; |
| 550 int i; | |
| 551 | |
| 552 ascendrate_in_seconds_for_one_bar = 60 * 10 / pBuDiveSettings->ascentRate_meterperminute; | |
| 553 | |
| 554 if(fabsf(gPressure - gSurface_pressure_bar) < PRESSURE_HALF_METER) | |
| 555 { | |
| 556 gPressure = gSurface_pressure_bar; | |
| 557 return 0; | |
| 558 } | |
| 559 | |
| 560 pressureTop = gPressure - pressure_decrease; | |
| 561 if( gSurface_pressure_bar > pressureTop) | |
| 562 pressureTop = gSurface_pressure_bar; | |
| 563 pressureBottom = gPressure; | |
| 564 seconds = 0; | |
| 565 do{ | |
| 566 pressureTop_tmp = pressureTop; | |
| 567 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++) | |
| 568 { | |
| 569 if(pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0) | |
| 570 break; | |
| 571 pressureChange = gSurface_pressure_bar + ((float)pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero) / 10; | |
| 572 if(pressureBottom <= pressureChange) | |
| 573 { | |
| 574 gGas_id = i; | |
| 575 } | |
| 576 else | |
| 577 { | |
| 578 break; | |
| 579 } | |
| 580 | |
| 581 } | |
| 582 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++) | |
| 583 { | |
| 584 if(pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0) | |
| 585 break; | |
| 586 pressureChange = gSurface_pressure_bar + ((float)pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero)/ 10; | |
| 587 if((pressureChange < pressureBottom) && (pressureChange > pressureTop)) | |
| 588 { | |
| 589 pressureTop_tmp = pressureChange; | |
| 590 } | |
| 591 } | |
| 592 pressure_difference = pressureBottom - pressureTop_tmp; | |
| 593 if(pressure_difference > 0.0001f) | |
| 594 { | |
| 595 time_for_ascend = (int)ceilf(pressure_difference * ascendrate_in_seconds_for_one_bar); | |
| 596 decom_tissues_exposure_stage_schreiner(time_for_ascend, &pBuDiveSettings->decogaslist[gGas_id], | |
| 597 pressureBottom, pressureTop_tmp, gTissue_nitrogen_bar, gTissue_helium_bar); | |
| 598 decom_oxygen_calculate_cns_stage_SchreinerStyle(time_for_ascend,&pBuDiveSettings->decogaslist[gGas_id], | |
| 599 pressureBottom, pressureTop_tmp, &gCNS); | |
| 600 } | |
| 601 pressureBottom = pressureTop_tmp; | |
| 602 seconds += time_for_ascend; | |
| 603 }while(pressureTop_tmp > pressureTop); | |
| 604 gPressure = pressureTop; | |
| 605 return seconds; | |
| 606 } | |
| 607 | |
| 608 | |
| 609 float get_gf_at_pressure(float pressure) | |
| 610 { | |
| 611 float gfSteigung = 0.0f; | |
| 612 | |
| 613 if(gGF_low_depth_bar < 0) | |
| 614 gGF_low_depth_bar = PRESSURE_THREE_METER; // just to prevent erratic behaviour if variable is not set | |
| 615 | |
| 616 gfSteigung = ((float)(pBuDiveSettings->gf_high - pBuDiveSettings->gf_low))/ gGF_low_depth_bar; | |
| 617 | |
| 618 | |
| 619 if((pressure - gSurface_pressure_bar) <= PRESSURE_HALF_METER) | |
| 620 return ((float)pBuDiveSettings->gf_high) / 100.0f; | |
| 621 | |
| 622 if(pressure >= gSurface_pressure_bar + gGF_low_depth_bar) | |
| 623 return ((float)pBuDiveSettings->gf_low) / 100.0f; | |
| 624 | |
| 625 return (pBuDiveSettings->gf_high - gfSteigung * (pressure - gSurface_pressure_bar) )/ 100.0f; | |
| 626 } | |
| 627 | |
| 628 | |
| 629 void buehlmann_calc_ndl(void) | |
| 630 { | |
| 631 float local_tissue_nitrogen_bar[16]; | |
| 632 float local_tissue_helium_bar[16]; | |
| 633 int i; | |
| 634 | |
| 635 gNDL = 0; | |
| 636 //Check ndl always use gHigh | |
| 637 gGF_value = ((float)pBuDiveSettings->gf_high) / 100.0f; | |
| 638 //10 minutes steps | |
| 639 while(gNDL < (300 * 60)) | |
| 640 { | |
| 641 memcpy(local_tissue_nitrogen_bar, gTissue_nitrogen_bar, (4*16)); | |
| 642 memcpy(local_tissue_helium_bar, gTissue_helium_bar, (4*16)); | |
| 643 // | |
| 644 gNDL += 600; | |
| 645 decom_tissues_exposure2(600, &pBuDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar); | |
| 646 decom_oxygen_calculate_cns_exposure(600,&pBuDiveSettings->decogaslist[gGas_id],gPressure,&gCNS); | |
| 647 //tissues_exposure_at_gPressure_seconds(600); | |
| 648 buehlmann_backup_and_restore(true); | |
| 649 if(dive1_check_deco() == true) | |
| 650 { | |
| 651 buehlmann_backup_and_restore(false); | |
| 652 break; | |
| 653 } | |
| 654 buehlmann_backup_and_restore(false); | |
| 655 } | |
| 656 | |
| 657 if(gNDL < (300 * 60)) | |
| 658 gNDL -= 600; | |
| 659 | |
| 660 if(gNDL > (150 * 60)) | |
| 661 return; | |
| 662 | |
| 663 // refine | |
| 664 memcpy(gTissue_nitrogen_bar, local_tissue_nitrogen_bar, (4*16)); | |
| 665 memcpy(gTissue_helium_bar, local_tissue_helium_bar, (4*16)); | |
| 666 | |
| 667 //One minutes step | |
| 668 for(i = 0; i < 20; i++) | |
| 669 { | |
| 670 gNDL += 60; | |
| 671 //tissues_exposure_at_gPressure_seconds(60); | |
| 672 decom_tissues_exposure2(60, &pBuDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar); | |
| 673 decom_oxygen_calculate_cns_exposure(60,&pBuDiveSettings->decogaslist[gGas_id],gPressure,&gCNS); | |
| 674 buehlmann_backup_and_restore(true); | |
| 675 if(dive1_check_deco() == true) | |
| 676 break; | |
| 677 buehlmann_backup_and_restore(false); | |
| 678 } | |
| 679 //gNDL -= 60; | |
| 680 return; | |
| 681 } | |
| 682 | |
| 683 | |
| 684 // =============================================================================== | |
| 685 // dive1_check_deco | |
| 686 /// @brief for NDL calculations | |
| 687 /// 160614 using ceilingOther and not ceiling | |
| 688 // =============================================================================== | |
| 689 _Bool dive1_check_deco(void) | |
| 690 { | |
| 691 // gGF_value is set in call routine; | |
| 692 // internes Backup! | |
| 693 | |
| 694 // calc like in deco | |
| 695 float ceiling; | |
| 696 float ceilingOther; // new hw 160614 | |
| 697 | |
| 698 ceiling = tissue_tolerance(); | |
| 699 ambient_bar_to_deco_stop_depth_bar(ceiling); // this will set gStop.depth :-) (and gStop.id) | |
| 700 | |
| 701 // set the base for all upcoming parameters | |
| 702 ceilingOther = gStop.depth + gSurface_pressure_bar; | |
| 703 | |
| 704 // modify parameters if there is ascend or parameter fine adjustment | |
| 705 if(ceilingOther < (gPressure - PRESSURE_150_CM)) // more than 1.5 meter below ceiling | |
| 706 { | |
| 707 // ascend within 10 mtr to GF_low // speed 12 mtr/min -> 50 sec / 10 mtr; 15 sec / 3 mtr. | |
| 708 while(((gPressure - PRESSURE_TEN_METER ) > gSurface_pressure_bar) && (ceiling < (gPressure - PRESSURE_TEN_METER))) | |
| 709 { | |
| 710 ascend_with_all_gaschanges(PRESSURE_TEN_METER); | |
| 711 ceiling = tissue_tolerance(); | |
| 712 } | |
| 713 while(((gPressure - PRESSURE_THREE_METER )> gSurface_pressure_bar) && (ceiling < gPressure)) | |
| 714 { | |
| 715 ascend_with_all_gaschanges(PRESSURE_THREE_METER); | |
| 716 ceiling = tissue_tolerance(); | |
| 717 } | |
| 718 } | |
| 719 if(ceiling <= gSurface_pressure_bar) | |
| 720 return false; | |
| 721 else | |
| 722 return true; | |
| 723 } | |
| 724 | |
| 725 | |
| 726 void buehlmann_ceiling_calculator(SLifeData* pLifeData, SDiveSettings * pDiveSettings, SDecoinfo * pDecoInfo) | |
| 727 { | |
| 728 float gf_low; | |
| 729 float gf_high; | |
| 730 float gf_delta; | |
| 731 int dv_gf_low_stop_meter; | |
| 732 _Bool test_result; | |
| 733 float next_gf_value; | |
| 734 float next_pressure_absolute; | |
| 735 int depth_in_meter; | |
| 736 | |
| 737 gf_low = pDiveSettings->gf_low; | |
| 738 gf_high = pDiveSettings->gf_high; | |
| 739 | |
| 740 // | |
| 741 dv_gf_low_stop_meter = (int)((pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero - pLifeData->pressure_surface_bar) * 10); | |
| 742 // | |
| 743 if(dv_gf_low_stop_meter < 1) | |
| 744 { | |
| 745 next_gf_value = gf_high; // fix hw 161024 | |
| 746 gf_delta = 0; | |
| 747 } | |
| 748 else | |
| 749 { | |
| 750 next_gf_value = gf_high; | |
| 751 gf_delta = gf_high - gf_low; | |
| 752 gf_delta /= dv_gf_low_stop_meter; // gf_delta is delta for each meter now!! | |
| 753 } | |
| 754 // | |
| 755 depth_in_meter = 0; | |
| 756 next_pressure_absolute = pLifeData->pressure_surface_bar; | |
| 757 | |
| 758 memcpy(gTissue_nitrogen_bar, pLifeData->tissue_nitrogen_bar, (4*16)); | |
| 759 memcpy(gTissue_helium_bar, pLifeData->tissue_helium_bar, (4*16)); | |
| 760 gGF_value = next_gf_value / 100.0f; | |
| 761 // | |
| 762 test_result = buehlmann_tissue_test_tolerance(next_pressure_absolute); | |
| 763 // | |
| 764 while(!test_result && depth_in_meter < 200) | |
| 765 { | |
| 766 depth_in_meter += 1; | |
| 767 next_gf_value = fmaxf(gf_low, next_gf_value - gf_delta); | |
| 768 gGF_value = next_gf_value / 100.0f; | |
| 769 next_pressure_absolute += 0.1f; // 1 meter down | |
| 770 test_result = buehlmann_tissue_test_tolerance(next_pressure_absolute); | |
| 771 } | |
| 772 // | |
| 773 if(test_result) | |
| 774 { | |
| 775 // old direct paste | |
| 776 pDecoInfo->output_ceiling_meter = depth_in_meter; | |
| 777 // new sub-meter hw 160331 | |
| 778 if(depth_in_meter >= 1) | |
| 779 { | |
| 780 for(int i = 0; i < 10; i++) | |
| 781 { | |
| 782 next_gf_value += gf_delta/10.0f; | |
| 783 gGF_value = next_gf_value / 100.0f; | |
| 784 next_pressure_absolute -= 0.01f; // 0.1 meter up | |
| 785 if(!buehlmann_tissue_test_tolerance(next_pressure_absolute)) | |
| 786 { | |
| 787 pDecoInfo->output_ceiling_meter -= ((float)i)/10.0f; | |
| 788 break; | |
| 789 } | |
| 790 } | |
| 791 } | |
| 792 } | |
| 793 else | |
| 794 { | |
| 795 pDecoInfo->output_ceiling_meter = 999; | |
| 796 } | |
| 797 } | |
| 798 | |
| 799 | |
| 800 void buehlmann_relative_gradient_calculator(SLifeData* pLifeData, SDiveSettings * pDiveSettings, SDecoinfo * pDecoInfo) | |
| 801 { | |
| 802 float gf_low; | |
| 803 float gf_high; | |
| 804 float gf_delta; | |
| 805 int dv_gf_low_stop_meter; | |
| 806 | |
| 807 float rgf; // relative gradient factor by hwOS p2_deco.c | |
| 808 float temp_tissue; | |
| 809 float limit; | |
| 810 float pres_respiration; | |
| 811 float gf; | |
| 812 | |
| 813 gf_low = pDiveSettings->gf_low; | |
| 814 gf_high = pDiveSettings->gf_high; | |
| 815 | |
| 816 dv_gf_low_stop_meter = (int)((pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero - pLifeData->pressure_surface_bar) * 10); | |
| 817 | |
| 818 if(dv_gf_low_stop_meter < 1) | |
| 819 { | |
| 820 gf_delta = 0; | |
| 821 } | |
| 822 else | |
| 823 { | |
| 824 gf_delta = gf_high - gf_low; | |
| 825 gf_delta /= dv_gf_low_stop_meter; // gf_delta is delta for each meter now!! | |
| 826 } | |
| 827 | |
| 828 | |
| 829 limit = tissue_tolerance_without_gf_correction(&temp_tissue); | |
| 830 pres_respiration = pLifeData->pressure_ambient_bar; | |
| 831 | |
| 832 if( temp_tissue <= pres_respiration ) | |
| 833 { | |
| 834 gf = 0.0; | |
| 835 } | |
| 836 else | |
| 837 { | |
| 838 gf = (temp_tissue - pres_respiration) | |
| 839 / (temp_tissue - limit) | |
| 840 * 100.0f; | |
| 841 } | |
| 842 | |
| 843 if(dv_gf_low_stop_meter < 1) | |
| 844 { | |
| 845 rgf = gf_high; | |
| 846 } | |
| 847 else | |
| 848 { | |
| 849 float temp1 = dv_gf_low_stop_meter; | |
| 850 float temp2 = pLifeData->depth_meter; | |
| 851 | |
| 852 if (temp2 <= 0) | |
| 853 rgf = gf_high; | |
| 854 else if (temp2 >= temp1) | |
| 855 rgf = gf_low; | |
| 856 else | |
| 857 rgf = gf_low + (temp1 - temp2)*gf_delta; | |
| 858 } | |
| 859 | |
| 860 rgf = gf / rgf; | |
| 861 | |
| 862 // avoid discussions about values > 100 below next deco stop | |
| 863 if((rgf > 1.0f) && (pLifeData->depth_meter >= pDecoInfo->output_ceiling_meter)) | |
| 864 rgf = 1.0f; | |
| 865 | |
| 866 pDecoInfo->output_relative_gradient = rgf; | |
| 867 } |