Mercurial > public > ostc4
annotate Discovery/Src/buehlmann.c @ 223:5f535ef6a3db div-fixes-3
Bugfix, minor: properly alternate VPM/Buhlmann in deco loop
The idea of the counter in this commit is to compute the opposite
deco algorithm in 1:10 calls. So, when Buhlmann is selected,
also compute VPM with 1:10 sample rate (and vise versa).
The idea is good, but this never worked as the counter was local on
the stack, so was 0 for every call here. So, when switching between
deco algorithm, it took some refresh cycles as the computations
where not in sync.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
| author | Jan Mulder <jlmulder@xs4all.nl> |
|---|---|
| date | Sun, 31 Mar 2019 15:14:06 +0200 |
| parents | b7689d9e888a |
| children | ceecabfddb57 |
| rev | line source |
|---|---|
|
51
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Resolved warnings pointing to possible invalid memory access
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1 /* getrennte Gase f�r die verschiedenen Modi |
|
8f8ea3a32e82
Resolved warnings pointing to possible invalid memory access
Ideenmodellierer
parents:
38
diff
changeset
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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 float gPressure; | |
| 82 int gGas_id; | |
| 83 float gTTS; | |
| 84 float gTissue_nitrogen_bar[16]; | |
| 85 float gTissue_helium_bar[16]; | |
|
130
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86 float gGF_value; |
| 38 | 87 float gCNS; |
| 88 //float gMax_ceiling_bar = 0; | |
| 89 int gNDL; | |
| 90 | |
| 91 | |
| 92 //SLifeData *pLifeData; | |
| 93 SDiveSettings *pBuDiveSettings; | |
| 94 SDecoinfo* pDecolistBuehlmann; | |
| 95 //signed char gGaschange_decreasing_depth_gas_id[BUEHLMANN_STRUCT_MAX_GASES]; | |
| 96 float gGF_low_depth_bar; | |
| 97 SStop gStop; | |
| 98 | |
| 99 void buehlmann_init(void) | |
| 100 { | |
| 101 //gMax_ceiling_bar = 0; | |
| 102 } | |
| 103 | |
| 104 void buehlmann_backup_and_restore(_Bool backup_restore_otherwise) | |
| 105 { | |
| 106 static float pressure; | |
| 107 static float gas_id; | |
| 108 static float tts; | |
| 109 static float tissue_nitrogen_bar[16]; | |
| 110 static float tissue_helium_bar[16]; | |
| 111 static float gf_value; | |
| 112 static int ndl; | |
| 113 static float cns; | |
| 114 | |
| 115 if(backup_restore_otherwise) | |
| 116 { | |
| 117 pressure = gPressure; | |
| 118 gas_id = gGas_id; | |
| 119 tts = gTTS; | |
| 120 gf_value = gGF_value; | |
| 121 ndl = gNDL; | |
| 122 cns = gCNS; | |
| 123 memcpy(tissue_nitrogen_bar, gTissue_nitrogen_bar, (4*16)); | |
| 124 memcpy(tissue_helium_bar, gTissue_helium_bar, (4*16)); | |
| 125 } | |
| 126 else | |
| 127 { | |
| 128 gPressure = pressure; | |
| 129 gGas_id = gas_id; | |
| 130 gTTS = tts; | |
| 131 gGF_value = gf_value; | |
| 132 gNDL = ndl; | |
| 133 gCNS = cns; | |
| 134 memcpy(gTissue_nitrogen_bar, tissue_nitrogen_bar, (4*16)); | |
| 135 memcpy(gTissue_helium_bar, tissue_helium_bar, (4*16)); | |
| 136 } | |
| 137 | |
| 138 } | |
| 139 /*void buehlmann__test__saturate_tissues(SBuehlmann *pInput, int seconds) | |
| 140 { | |
| 141 pBuehlmann = pInput; | |
| 142 pInput->dive_time_seconds += seconds; | |
| 143 // internal copying | |
| 144 gSurface_pressure_bar = pBuehlmann->pressure_surface_bar; | |
| 145 | |
| 146 gPressure = pBuehlmann->pressure_ambient_bar; | |
| 147 gGas_id = pBuehlmann->actual_gas_id; | |
| 148 memcpy(gTissue_nitrogen_bar, pBuehlmann->tissue_nitrogen_bar, (4*16)); | |
| 149 memcpy(gTissue_helium_bar, pBuehlmann->tissue_helium_bar, (4*16)); | |
| 150 | |
| 151 tissues_exposure_at_gPressure_seconds(seconds); | |
| 152 | |
| 153 memcpy(pBuehlmann->tissue_nitrogen_bar, gTissue_nitrogen_bar, (4*16)); | |
| 154 memcpy(pBuehlmann->tissue_helium_bar, gTissue_helium_bar, (4*16)); | |
| 155 }*/ | |
| 156 | |
| 157 float buehlmann_get_gCNS(void) | |
| 158 { | |
| 159 return gCNS; | |
| 160 } | |
| 161 | |
| 162 void buehlmann_calc_deco(SLifeData* pLifeData, SDiveSettings * pDiveSettings, SDecoinfo * pDecoInfo) | |
| 163 { | |
| 164 float ceiling; | |
| 165 int ascend_time; | |
| 166 int tts_seconds; | |
| 167 float pressure_delta; | |
| 168 float next_depth; | |
| 169 _Bool deco_reached = false; | |
| 170 // tissue_test_tolerance_struct tolerance_data; | |
| 171 unsigned short *stoplist; | |
| 172 int i; | |
| 173 | |
| 174 // decom_CreateGasChangeList(pDiveSettings, pLifeData); | |
| 175 | |
| 176 gCNS = 0; | |
| 177 pDecoInfo->output_time_to_surface_seconds = 0; | |
| 178 pDecoInfo->output_ndl_seconds = 0; | |
| 179 for(int i=0;i<DECOINFO_STRUCT_MAX_STOPS;i++) | |
| 180 { | |
| 181 pDecoInfo->output_stop_length_seconds[i] = 0; | |
| 182 } | |
| 183 /* make input available global*/ | |
| 184 pBuDiveSettings = pDiveSettings; | |
| 185 | |
| 186 pDecolistBuehlmann = pDecoInfo; | |
| 187 /* internal copying */ | |
| 188 gSurface_pressure_bar = pLifeData->pressure_surface_bar; | |
| 189 | |
| 190 gPressure = pLifeData->pressure_ambient_bar; | |
| 191 gGas_id = 0; | |
| 192 memcpy(gTissue_nitrogen_bar, pLifeData->tissue_nitrogen_bar, (4*16)); | |
| 193 memcpy(gTissue_helium_bar, pLifeData->tissue_helium_bar, (4*16)); | |
| 194 gGF_value = ((float)pBuDiveSettings->gf_low) / 100.0f; | |
| 195 | |
| 196 // | |
| 197 memcpy(&gDecotable, pDecolistBuehlmann, sizeof(SDecoinfo)); | |
| 198 stoplist = gDecotable.output_stop_length_seconds; | |
| 199 | |
| 200 | |
| 201 if(pLifeData->dive_time_seconds < 60) | |
| 202 return; | |
| 203 /* coupling */ | |
| 204 | |
| 205 /* functions */ | |
| 206 | |
| 207 // clean stop list | |
| 208 for(i = 0; i < DECOINFO_STRUCT_MAX_STOPS; i++) | |
| 209 stoplist[i] = 0; | |
| 210 gTTS = 0; | |
| 211 gNDL = 0; | |
| 212 | |
| 213 if(pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero >= (gPressure - PRESSURE_150_CM)) | |
| 214 { | |
| 215 deco_reached = true; | |
| 216 } | |
| 217 | |
| 218 | |
| 219 //ascend_with_all_gaschanges(gPressure - gSurface_pressure_bar); | |
| 220 gGF_value = ((float)pBuDiveSettings->gf_high) / 100.0f; | |
| 221 //iling = tissue_tolerance(); | |
| 222 // includes backup for gGF_value | |
| 223 // NDL | |
| 224 buehlmann_backup_and_restore(true); // includes backup for gGF_value | |
| 225 if(!dive1_check_deco() ) | |
| 226 { | |
| 227 buehlmann_backup_and_restore(false); | |
| 228 // no deco | |
| 229 pDecolistBuehlmann->output_time_to_surface_seconds = 0; | |
| 230 for(i = 0; i < DECOINFO_STRUCT_MAX_STOPS; i++) | |
| 231 pDecolistBuehlmann->output_stop_length_seconds[i] = 0; | |
| 232 // calc NDL | |
| 233 buehlmann_calc_ndl(); | |
| 234 pDecolistBuehlmann->output_ndl_seconds = gNDL; | |
| 235 return; | |
| 236 } | |
| 237 buehlmann_backup_and_restore(false); | |
| 238 pDecolistBuehlmann->output_ndl_seconds = 0; | |
| 239 | |
| 240 gGF_value = get_gf_at_pressure(gPressure); | |
| 241 //current ceiling at actual position | |
| 242 ceiling = tissue_tolerance(); | |
| 243 //if(ceiling < pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero) | |
| 244 //ambient_bar_to_deco_stop_depth_bar(pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero); | |
| 245 //else | |
| 246 ambient_bar_to_deco_stop_depth_bar(ceiling); | |
| 247 | |
| 248 // set the base for all upcoming parameters | |
| 249 ceiling = gStop.depth + gSurface_pressure_bar; | |
| 250 tts_seconds = 0; | |
| 251 | |
| 252 // modify parameters if there is ascend or parameter fine adjustment | |
| 253 if(ceiling < (gPressure - PRESSURE_150_CM)) // more than 1.5 meter below ceiling | |
| 254 { | |
| 255 // ascend within 10 mtr to GF_low // speed 12 mtr/min -> 50 sec / 10 mtr; 15 sec / 3 mtr. | |
| 256 if(ceiling < (gPressure - PRESSURE_TEN_METER) ) | |
| 257 { do { | |
| 258 ascend_time = ascend_with_all_gaschanges(PRESSURE_TEN_METER); | |
| 259 tts_seconds += ascend_time; | |
| 260 ceiling = tissue_tolerance(); | |
| 261 if(tts_seconds > DECO_STOPS_MAX_TTS_CALCULATON_IN_SECONDS) | |
| 262 { | |
| 263 /* pInput == pBuehlmann */ | |
| 264 pDecolistBuehlmann->output_time_to_surface_seconds = NINETY_NINE_MINUTES_IN_SECONDS; | |
| 265 return;// NINETY_NINE_MINUTES_IN_SECONDS; | |
| 266 } | |
| 267 } while ((ascend_time > 0 ) && ((gPressure - PRESSURE_TEN_METER ) > gSurface_pressure_bar) && (ceiling < (gPressure - PRESSURE_TEN_METER))); | |
| 268 } | |
| 269 do { | |
| 270 buehlmann_backup_and_restore(true); | |
| 271 ascend_time = ascend_with_all_gaschanges(PRESSURE_THREE_METER); | |
| 272 tts_seconds += ascend_time; | |
| 273 ceiling = tissue_tolerance(); | |
| 274 if(tts_seconds > DECO_STOPS_MAX_TTS_CALCULATON_IN_SECONDS) | |
| 275 { | |
| 276 /* pInput == pBuehlmann */ | |
| 277 pDecolistBuehlmann->output_time_to_surface_seconds = NINETY_NINE_MINUTES_IN_SECONDS; | |
| 278 return;// NINETY_NINE_MINUTES_IN_SECONDS; | |
| 279 } | |
| 280 ambient_bar_to_deco_stop_depth_bar(ceiling); | |
| 281 } while ((ascend_time > 0 ) && ((gStop.depth + gSurface_pressure_bar) < gPressure)); | |
| 282 | |
| 283 if(gStop.depth + gSurface_pressure_bar > gPressure) | |
| 284 { | |
| 285 gPressure += PRESSURE_THREE_METER; | |
| 286 buehlmann_backup_and_restore(false); | |
| 287 tts_seconds -= ascend_time; | |
| 288 } | |
| 289 // calculate first stop based on tissue saturation within 10 meters of stop | |
| 290 //ambient_bar_to_deco_stop_depth_bar(ceiling); | |
| 291 } | |
| 292 else | |
| 293 { | |
| 294 // initial values, upper code might not be executed (is within 150 cm) | |
| 295 } | |
| 296 | |
| 297 | |
| 298 | |
| 299 | |
| 300 if(ceiling > gSurface_pressure_bar) | |
| 301 { | |
| 302 | |
| 303 ceiling = gStop.depth + gSurface_pressure_bar; | |
| 304 // ascend the last meters to first stop (especially consider any gas changes around) | |
| 305 pressure_delta = gPressure - ceiling; | |
| 306 ascend_time = (int)ceil(pressure_delta * 50.0f); | |
| 307 tts_seconds += ascend_with_all_gaschanges(pressure_delta); | |
| 308 } | |
| 309 // NDL check | |
| 310 if(ceiling <= gSurface_pressure_bar) | |
| 311 { | |
| 312 /* pInput == pBuehlmann same pointer*/ | |
| 313 // NDL with GF_low | |
| 314 pDecolistBuehlmann->output_time_to_surface_seconds = 0; | |
| 315 return; | |
| 316 } | |
| 317 if(ceiling >pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero) | |
| 318 pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero = ceiling; | |
| 319 | |
| 320 // calc gf loop | |
| 321 if(deco_reached) | |
| 322 gGF_low_depth_bar = pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero - gSurface_pressure_bar; | |
| 323 else | |
| 324 gGF_low_depth_bar = ceiling - gSurface_pressure_bar; | |
| 325 | |
| 326 while(gStop.depth > 0) | |
| 327 { | |
| 328 do | |
| 329 { | |
| 330 next_depth = next_stop_depth_input_is_actual_stop_id(gStop.id); | |
| 331 gGF_value = get_gf_at_pressure(next_depth + gSurface_pressure_bar); | |
| 332 buehlmann_backup_and_restore(true); | |
| 333 ascend_time = ascend_with_all_gaschanges(gStop.depth - next_depth); | |
| 334 ceiling = tissue_tolerance(); | |
| 335 /* pre check actual limit */ | |
| 336 if(gDecotable.output_stop_length_seconds[gStop.id] >= 999*60) | |
| 337 { | |
| 338 tts_seconds -= 999*60 - gDecotable.output_stop_length_seconds[gStop.id]; | |
| 339 gDecotable.output_stop_length_seconds[gStop.id] = 999*60; | |
| 340 } | |
| 341 else | |
| 342 /* more deco on the actual depth */ | |
| 343 if(ceiling > next_depth + gSurface_pressure_bar) | |
| 344 { | |
| 345 next_depth = -1; | |
| 346 buehlmann_backup_and_restore(false); | |
| 347 decom_tissues_exposure2(10, &pBuDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar); // some seconds at least at each stop | |
| 348 decom_oxygen_calculate_cns_exposure(10, &pBuDiveSettings->decogaslist[gGas_id], gPressure, &gCNS); | |
| 349 gDecotable.output_stop_length_seconds[gStop.id] += 10; | |
| 350 tts_seconds += 10; | |
| 351 } | |
| 352 } while(next_depth == -1); | |
| 353 tts_seconds += ascend_time; | |
| 354 gStop.depth = next_depth; | |
| 355 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++) | |
| 356 { | |
| 357 if(pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0) | |
| 358 break; | |
| 359 float pressureChange = ((float)pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero) / 10; | |
| 360 if(gStop.depth <= pressureChange + 0.00001f) | |
| 361 { | |
| 362 gGas_id = i; | |
| 363 } | |
| 364 else | |
| 365 { | |
| 366 break; | |
| 367 } | |
| 368 } | |
| 369 gStop.id--; | |
| 370 } | |
| 371 | |
| 372 gDecotable.output_time_to_surface_seconds = tts_seconds; | |
| 373 memcpy(pDecolistBuehlmann, &gDecotable, sizeof(SDecoinfo)); | |
| 374 } | |
| 375 | |
| 376 | |
| 377 float tissue_tolerance(void) | |
| 378 { | |
| 379 float tissue_inertgas_saturation; | |
| 380 float inertgas_a; | |
| 381 float inertgas_b; | |
| 382 float ceiling; | |
| 383 float global_ceiling; | |
| 384 int ci; | |
| 385 | |
| 386 global_ceiling = -1; | |
| 387 | |
| 388 for (ci = 0; ci < 16; ci++) | |
| 389 { | |
| 390 if(gTissue_helium_bar[ci] == 0) | |
| 391 { | |
| 392 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci]; | |
| 393 // | |
| 394 inertgas_a = buehlmann_N2_a[ci]; | |
| 395 inertgas_b = buehlmann_N2_b[ci]; | |
| 396 } | |
| 397 else | |
| 398 { | |
| 399 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci]; | |
| 400 // | |
| 401 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 402 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 403 } | |
| 404 // | |
| 405 ceiling = (inertgas_b * ( tissue_inertgas_saturation - gGF_value * inertgas_a ) ) / (gGF_value - (inertgas_b * gGF_value) + inertgas_b); | |
| 406 if(ceiling > global_ceiling) | |
| 407 global_ceiling = ceiling; | |
| 408 } | |
| 409 return global_ceiling; | |
| 410 } | |
| 411 | |
| 412 // hw 161121 for relative gradient | |
| 413 float tissue_tolerance_without_gf_correction(float *tissue_inertgas_saturation_output) | |
| 414 { | |
| 415 float tissue_inertgas_saturation; | |
| 416 float inertgas_a; | |
| 417 float inertgas_b; | |
| 418 float ceiling; | |
| 419 float global_ceiling; | |
| 420 int ci; | |
| 421 | |
| 422 global_ceiling = -1; | |
| 423 | |
| 424 for (ci = 0; ci < 16; ci++) | |
| 425 { | |
| 426 if(gTissue_helium_bar[ci] == 0) | |
| 427 { | |
| 428 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci]; | |
| 429 // | |
| 430 inertgas_a = buehlmann_N2_a[ci]; | |
| 431 inertgas_b = buehlmann_N2_b[ci]; | |
| 432 } | |
| 433 else | |
| 434 { | |
| 435 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci]; | |
| 436 // | |
| 437 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 438 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 439 } | |
| 440 // | |
| 441 ceiling = inertgas_b * ( tissue_inertgas_saturation - inertgas_a ); | |
| 442 if(ceiling > global_ceiling) | |
| 443 { | |
| 444 global_ceiling = ceiling; | |
| 445 if(tissue_inertgas_saturation_output) | |
| 446 { | |
| 447 *tissue_inertgas_saturation_output = tissue_inertgas_saturation; | |
| 448 } | |
| 449 } | |
| 450 } | |
| 451 return global_ceiling; | |
| 452 } | |
| 453 | |
| 454 | |
| 455 uint8_t buehlmann_tissue_test_tolerance(float depth_in_bar_absolute) | |
| 456 { | |
| 457 float tissue_inertgas_saturation; | |
| 458 float inertgas_a; | |
| 459 float inertgas_b; | |
| 460 float inertgas_tolerance; | |
| 461 float gf_minus_1; | |
| 462 | |
| 463 gf_minus_1 = gGF_value - 1.0f; | |
| 464 | |
| 465 for (int ci = 0; ci < 16; ci++) | |
| 466 { | |
| 467 if(gTissue_helium_bar[ci] == 0) | |
| 468 { | |
| 469 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci]; | |
| 470 // | |
| 471 inertgas_a = buehlmann_N2_a[ci]; | |
| 472 inertgas_b = buehlmann_N2_b[ci]; | |
| 473 } | |
| 474 else | |
| 475 { | |
| 476 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci]; | |
| 477 // | |
| 478 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 479 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 480 } | |
| 481 // | |
| 482 inertgas_tolerance = ( (gGF_value / inertgas_b - gf_minus_1) * depth_in_bar_absolute ) + ( gGF_value * inertgas_a ); | |
| 483 // | |
| 484 if(inertgas_tolerance < tissue_inertgas_saturation) | |
| 485 return 0; | |
| 486 } | |
| 487 return 1; | |
| 488 } | |
| 489 | |
| 490 | |
| 491 void ambient_bar_to_deco_stop_depth_bar(float ceiling) | |
| 492 { | |
| 493 int i; | |
| 494 | |
| 495 ceiling -= gSurface_pressure_bar; | |
| 496 | |
| 497 if(ceiling <= 0) | |
| 498 { | |
| 499 gStop.depth = pBuDiveSettings->last_stop_depth_bar; | |
| 500 gStop.id = 0; | |
| 501 return; | |
| 502 } | |
| 503 | |
| 504 | |
| 505 //for(int i = 1; i < 10; i++) | |
| 506 | |
| 507 if((ceiling - pBuDiveSettings->last_stop_depth_bar) <= 0) | |
| 508 { | |
| 509 gStop.depth = pBuDiveSettings->last_stop_depth_bar; | |
| 510 gStop.id = 0; | |
| 511 return; | |
| 512 } | |
| 513 | |
| 514 gStop.depth = pBuDiveSettings->input_second_to_last_stop_depth_bar; | |
| 515 gStop.id = 1; | |
| 516 ceiling -= pBuDiveSettings->input_second_to_last_stop_depth_bar; | |
| 517 | |
| 518 if(ceiling <= 0) | |
| 519 return; | |
| 520 | |
| 521 for(i = 1; i < (DECOINFO_STRUCT_MAX_STOPS - 2); i++) | |
| 522 { | |
| 523 ceiling -= pBuDiveSettings->input_next_stop_increment_depth_bar; | |
| 524 if(ceiling <= 0) | |
| 525 break; | |
| 526 } | |
| 527 gStop.depth += i * pBuDiveSettings->input_next_stop_increment_depth_bar; | |
| 528 gStop.id += i; | |
| 529 return; | |
| 530 } | |
| 531 | |
| 532 float next_stop_depth_input_is_actual_stop_id(int actual_id) | |
| 533 { | |
| 534 if(actual_id == 0) | |
| 535 return 0; | |
| 536 | |
| 537 if(actual_id == 1) | |
| 538 return pBuDiveSettings->last_stop_depth_bar; | |
| 539 | |
| 540 actual_id -= 2; | |
| 541 return pBuDiveSettings->input_second_to_last_stop_depth_bar + (actual_id * pBuDiveSettings->input_next_stop_increment_depth_bar); | |
| 542 } | |
| 543 | |
| 544 int ascend_with_all_gaschanges(float pressure_decrease) | |
| 545 { | |
| 546 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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547 int time_for_ascend = 0; |
| 38 | 548 int seconds; |
| 549 int i; | |
| 550 | |
| 551 ascendrate_in_seconds_for_one_bar = 60 * 10 / pBuDiveSettings->ascentRate_meterperminute; | |
| 552 | |
| 553 if(fabsf(gPressure - gSurface_pressure_bar) < PRESSURE_HALF_METER) | |
| 554 { | |
| 555 gPressure = gSurface_pressure_bar; | |
| 556 return 0; | |
| 557 } | |
| 558 | |
| 559 pressureTop = gPressure - pressure_decrease; | |
| 560 if( gSurface_pressure_bar > pressureTop) | |
| 561 pressureTop = gSurface_pressure_bar; | |
| 562 pressureBottom = gPressure; | |
| 563 seconds = 0; | |
| 564 do{ | |
| 565 pressureTop_tmp = pressureTop; | |
| 566 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++) | |
| 567 { | |
| 568 if(pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0) | |
| 569 break; | |
| 570 pressureChange = gSurface_pressure_bar + ((float)pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero) / 10; | |
| 571 if(pressureBottom <= pressureChange) | |
| 572 { | |
| 573 gGas_id = i; | |
| 574 } | |
| 575 else | |
| 576 { | |
| 577 break; | |
| 578 } | |
| 579 | |
| 580 } | |
| 581 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++) | |
| 582 { | |
| 583 if(pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0) | |
| 584 break; | |
| 585 pressureChange = gSurface_pressure_bar + ((float)pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero)/ 10; | |
| 586 if((pressureChange < pressureBottom) && (pressureChange > pressureTop)) | |
| 587 { | |
| 588 pressureTop_tmp = pressureChange; | |
| 589 } | |
| 590 } | |
| 591 pressure_difference = pressureBottom - pressureTop_tmp; | |
| 592 if(pressure_difference > 0.0001f) | |
| 593 { | |
| 594 time_for_ascend = (int)ceilf(pressure_difference * ascendrate_in_seconds_for_one_bar); | |
| 595 decom_tissues_exposure_stage_schreiner(time_for_ascend, &pBuDiveSettings->decogaslist[gGas_id], | |
| 596 pressureBottom, pressureTop_tmp, gTissue_nitrogen_bar, gTissue_helium_bar); | |
| 597 decom_oxygen_calculate_cns_stage_SchreinerStyle(time_for_ascend,&pBuDiveSettings->decogaslist[gGas_id], | |
| 598 pressureBottom, pressureTop_tmp, &gCNS); | |
| 599 } | |
| 600 pressureBottom = pressureTop_tmp; | |
| 601 seconds += time_for_ascend; | |
| 602 }while(pressureTop_tmp > pressureTop); | |
| 603 gPressure = pressureTop; | |
| 604 return seconds; | |
| 605 } | |
| 606 | |
| 607 | |
| 608 float get_gf_at_pressure(float pressure) | |
| 609 { | |
| 610 float gfSteigung = 0.0f; | |
| 611 | |
| 612 if(gGF_low_depth_bar < 0) | |
| 613 gGF_low_depth_bar = PRESSURE_THREE_METER; // just to prevent erratic behaviour if variable is not set | |
| 614 | |
| 615 gfSteigung = ((float)(pBuDiveSettings->gf_high - pBuDiveSettings->gf_low))/ gGF_low_depth_bar; | |
| 616 | |
| 617 | |
| 618 if((pressure - gSurface_pressure_bar) <= PRESSURE_HALF_METER) | |
| 619 return ((float)pBuDiveSettings->gf_high) / 100.0f; | |
| 620 | |
| 621 if(pressure >= gSurface_pressure_bar + gGF_low_depth_bar) | |
| 622 return ((float)pBuDiveSettings->gf_low) / 100.0f; | |
| 623 | |
| 624 return (pBuDiveSettings->gf_high - gfSteigung * (pressure - gSurface_pressure_bar) )/ 100.0f; | |
| 625 } | |
| 626 | |
| 627 | |
| 628 void buehlmann_calc_ndl(void) | |
| 629 { | |
| 630 float local_tissue_nitrogen_bar[16]; | |
| 631 float local_tissue_helium_bar[16]; | |
| 632 int i; | |
| 633 | |
| 634 gNDL = 0; | |
| 635 //Check ndl always use gHigh | |
| 636 gGF_value = ((float)pBuDiveSettings->gf_high) / 100.0f; | |
| 637 //10 minutes steps | |
| 638 while(gNDL < (300 * 60)) | |
| 639 { | |
| 640 memcpy(local_tissue_nitrogen_bar, gTissue_nitrogen_bar, (4*16)); | |
| 641 memcpy(local_tissue_helium_bar, gTissue_helium_bar, (4*16)); | |
| 642 // | |
| 643 gNDL += 600; | |
| 644 decom_tissues_exposure2(600, &pBuDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar); | |
| 645 decom_oxygen_calculate_cns_exposure(600,&pBuDiveSettings->decogaslist[gGas_id],gPressure,&gCNS); | |
| 646 //tissues_exposure_at_gPressure_seconds(600); | |
| 647 buehlmann_backup_and_restore(true); | |
| 648 if(dive1_check_deco() == true) | |
| 649 { | |
| 650 buehlmann_backup_and_restore(false); | |
| 651 break; | |
| 652 } | |
| 653 buehlmann_backup_and_restore(false); | |
| 654 } | |
| 655 | |
| 656 if(gNDL < (300 * 60)) | |
| 657 gNDL -= 600; | |
| 658 | |
| 659 if(gNDL > (150 * 60)) | |
| 660 return; | |
| 661 | |
| 662 // refine | |
| 663 memcpy(gTissue_nitrogen_bar, local_tissue_nitrogen_bar, (4*16)); | |
| 664 memcpy(gTissue_helium_bar, local_tissue_helium_bar, (4*16)); | |
| 665 | |
| 666 //One minutes step | |
| 667 for(i = 0; i < 20; i++) | |
| 668 { | |
| 669 gNDL += 60; | |
| 670 //tissues_exposure_at_gPressure_seconds(60); | |
| 671 decom_tissues_exposure2(60, &pBuDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar); | |
| 672 decom_oxygen_calculate_cns_exposure(60,&pBuDiveSettings->decogaslist[gGas_id],gPressure,&gCNS); | |
| 673 buehlmann_backup_and_restore(true); | |
| 674 if(dive1_check_deco() == true) | |
| 675 break; | |
| 676 buehlmann_backup_and_restore(false); | |
| 677 } | |
| 678 //gNDL -= 60; | |
| 679 return; | |
| 680 } | |
| 681 | |
| 682 | |
| 683 // =============================================================================== | |
| 684 // dive1_check_deco | |
| 685 /// @brief for NDL calculations | |
| 686 /// 160614 using ceilingOther and not ceiling | |
| 687 // =============================================================================== | |
| 688 _Bool dive1_check_deco(void) | |
| 689 { | |
| 690 // gGF_value is set in call routine; | |
| 691 // internes Backup! | |
| 692 | |
| 693 // calc like in deco | |
| 694 float ceiling; | |
| 695 float ceilingOther; // new hw 160614 | |
| 696 | |
| 697 ceiling = tissue_tolerance(); | |
| 698 ambient_bar_to_deco_stop_depth_bar(ceiling); // this will set gStop.depth :-) (and gStop.id) | |
| 699 | |
| 700 // set the base for all upcoming parameters | |
| 701 ceilingOther = gStop.depth + gSurface_pressure_bar; | |
| 702 | |
| 703 // modify parameters if there is ascend or parameter fine adjustment | |
| 704 if(ceilingOther < (gPressure - PRESSURE_150_CM)) // more than 1.5 meter below ceiling | |
| 705 { | |
| 706 // ascend within 10 mtr to GF_low // speed 12 mtr/min -> 50 sec / 10 mtr; 15 sec / 3 mtr. | |
| 707 while(((gPressure - PRESSURE_TEN_METER ) > gSurface_pressure_bar) && (ceiling < (gPressure - PRESSURE_TEN_METER))) | |
| 708 { | |
| 709 ascend_with_all_gaschanges(PRESSURE_TEN_METER); | |
| 710 ceiling = tissue_tolerance(); | |
| 711 } | |
| 712 while(((gPressure - PRESSURE_THREE_METER )> gSurface_pressure_bar) && (ceiling < gPressure)) | |
| 713 { | |
| 714 ascend_with_all_gaschanges(PRESSURE_THREE_METER); | |
| 715 ceiling = tissue_tolerance(); | |
| 716 } | |
| 717 } | |
| 718 if(ceiling <= gSurface_pressure_bar) | |
| 719 return false; | |
| 720 else | |
| 721 return true; | |
| 722 } | |
| 723 | |
| 724 | |
| 725 void buehlmann_ceiling_calculator(SLifeData* pLifeData, SDiveSettings * pDiveSettings, SDecoinfo * pDecoInfo) | |
| 726 { | |
| 727 float gf_low; | |
| 728 float gf_high; | |
| 729 float gf_delta; | |
| 730 int dv_gf_low_stop_meter; | |
| 731 _Bool test_result; | |
| 732 float next_gf_value; | |
| 733 float next_pressure_absolute; | |
| 734 int depth_in_meter; | |
| 735 | |
| 736 gf_low = pDiveSettings->gf_low; | |
| 737 gf_high = pDiveSettings->gf_high; | |
| 738 | |
| 739 // | |
| 740 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); | |
| 741 // | |
| 742 if(dv_gf_low_stop_meter < 1) | |
| 743 { | |
| 744 next_gf_value = gf_high; // fix hw 161024 | |
| 745 gf_delta = 0; | |
| 746 } | |
| 747 else | |
| 748 { | |
| 749 next_gf_value = gf_high; | |
| 750 gf_delta = gf_high - gf_low; | |
| 751 gf_delta /= dv_gf_low_stop_meter; // gf_delta is delta for each meter now!! | |
| 752 } | |
| 753 // | |
| 754 depth_in_meter = 0; | |
| 755 next_pressure_absolute = pLifeData->pressure_surface_bar; | |
| 756 | |
| 757 memcpy(gTissue_nitrogen_bar, pLifeData->tissue_nitrogen_bar, (4*16)); | |
| 758 memcpy(gTissue_helium_bar, pLifeData->tissue_helium_bar, (4*16)); | |
| 759 gGF_value = next_gf_value / 100.0f; | |
| 760 // | |
| 761 test_result = buehlmann_tissue_test_tolerance(next_pressure_absolute); | |
| 762 // | |
| 763 while(!test_result && depth_in_meter < 200) | |
| 764 { | |
| 765 depth_in_meter += 1; | |
| 766 next_gf_value = fmaxf(gf_low, next_gf_value - gf_delta); | |
| 767 gGF_value = next_gf_value / 100.0f; | |
| 768 next_pressure_absolute += 0.1f; // 1 meter down | |
| 769 test_result = buehlmann_tissue_test_tolerance(next_pressure_absolute); | |
| 770 } | |
| 771 // | |
| 772 if(test_result) | |
| 773 { | |
| 774 // old direct paste | |
| 775 pDecoInfo->output_ceiling_meter = depth_in_meter; | |
| 776 // new sub-meter hw 160331 | |
| 777 if(depth_in_meter >= 1) | |
| 778 { | |
| 779 for(int i = 0; i < 10; i++) | |
| 780 { | |
| 781 next_gf_value += gf_delta/10.0f; | |
| 782 gGF_value = next_gf_value / 100.0f; | |
| 783 next_pressure_absolute -= 0.01f; // 0.1 meter up | |
| 784 if(!buehlmann_tissue_test_tolerance(next_pressure_absolute)) | |
| 785 { | |
| 786 pDecoInfo->output_ceiling_meter -= ((float)i)/10.0f; | |
| 787 break; | |
| 788 } | |
| 789 } | |
| 790 } | |
| 791 } | |
| 792 else | |
| 793 { | |
| 794 pDecoInfo->output_ceiling_meter = 999; | |
| 795 } | |
| 796 } | |
| 797 | |
| 798 | |
| 799 void buehlmann_relative_gradient_calculator(SLifeData* pLifeData, SDiveSettings * pDiveSettings, SDecoinfo * pDecoInfo) | |
| 800 { | |
| 801 float gf_low; | |
| 802 float gf_high; | |
| 803 float gf_delta; | |
| 804 int dv_gf_low_stop_meter; | |
| 805 | |
| 806 float rgf; // relative gradient factor by hwOS p2_deco.c | |
| 807 float temp_tissue; | |
| 808 float limit; | |
| 809 float pres_respiration; | |
| 810 float gf; | |
| 811 | |
| 812 gf_low = pDiveSettings->gf_low; | |
| 813 gf_high = pDiveSettings->gf_high; | |
| 814 | |
| 815 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); | |
| 816 | |
| 817 if(dv_gf_low_stop_meter < 1) | |
| 818 { | |
| 819 gf_delta = 0; | |
| 820 } | |
| 821 else | |
| 822 { | |
| 823 gf_delta = gf_high - gf_low; | |
| 824 gf_delta /= dv_gf_low_stop_meter; // gf_delta is delta for each meter now!! | |
| 825 } | |
| 826 | |
| 827 | |
| 828 limit = tissue_tolerance_without_gf_correction(&temp_tissue); | |
| 829 pres_respiration = pLifeData->pressure_ambient_bar; | |
| 830 | |
| 831 if( temp_tissue <= pres_respiration ) | |
| 832 { | |
| 833 gf = 0.0; | |
| 834 } | |
| 835 else | |
| 836 { | |
| 837 gf = (temp_tissue - pres_respiration) | |
| 838 / (temp_tissue - limit) | |
| 839 * 100.0f; | |
| 840 } | |
| 841 | |
| 842 if(dv_gf_low_stop_meter < 1) | |
| 843 { | |
| 844 rgf = gf_high; | |
| 845 } | |
| 846 else | |
| 847 { | |
| 848 float temp1 = dv_gf_low_stop_meter; | |
| 849 float temp2 = pLifeData->depth_meter; | |
| 850 | |
| 851 if (temp2 <= 0) | |
| 852 rgf = gf_high; | |
| 853 else if (temp2 >= temp1) | |
| 854 rgf = gf_low; | |
| 855 else | |
| 856 rgf = gf_low + (temp1 - temp2)*gf_delta; | |
| 857 } | |
| 858 | |
| 859 rgf = gf / rgf; | |
| 860 | |
| 861 // avoid discussions about values > 100 below next deco stop | |
| 862 if((rgf > 1.0f) && (pLifeData->depth_meter >= pDecoInfo->output_ceiling_meter)) | |
| 863 rgf = 1.0f; | |
| 864 | |
| 865 pDecoInfo->output_relative_gradient = rgf; | |
| 866 } |