Mercurial > public > hwos_code
annotate src/p2_deco.c @ 521:06e9370c6d75
CHANGE: Apply safety margin parameters to both models (GF and non-GF)
Put B?hlmann constants in code for readability
Fix unused gas warning (Do not warn)
| author | heinrichsweikamp |
|---|---|
| date | Fri, 04 Aug 2017 16:01:28 +0200 |
| parents | ff1e6adf55ad |
| children | 4d70a93b18cb |
| rev | line source |
|---|---|
| 0 | 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) 2011 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 | |
| 61 // 10/14/08 v104: integration of char_I_depth_last_deco for Gradient Model | |
| 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) | |
| 66 // 2011/01/20: [jDG] Create a common file included in ASM and C code. | |
| 67 // 2011/01/24: [jDG] Make ascenttime an short. No more overflow! | |
| 68 // 2011/01/25: [jDG] Fusion deco array for both models. | |
| 69 // 2011/01/25: [jDG] Use CF(54) to reverse deco order. | |
| 70 // 2011/02/11: [jDG] Reworked gradient-factor implementation. | |
| 71 // 2011/02/15: [jDG] Fixed inconsistencies introduced by gas switch delays. | |
| 72 // 2011/03/21: [jDG] Added gas consumption (CF56 & CF57) evaluation for OCR mode. | |
| 73 // 2011/04/15: [jDG] Store low_depth in 32bits (w/o rounding), for a better stability. | |
| 74 // 2011/04/25: [jDG] Added 1mn mode for CNS calculation, to allow it for decoplanning. | |
| 75 // 2011/04/27: [jDG] Fixed char_O_gradient_factor calculation when model uses gradient-factor. | |
| 76 // 2011/05/02: [jDG] Added "Future TTS" function (CF58). | |
| 77 // 2011/05/17: [jDG] Various cleanups. | |
| 78 // 2011/08/08: [jDG] Computes CNS during deco planning ascent. | |
| 79 // 2011/11/24: [jDG] Slightly faster and better NDL computation. | |
| 80 // 2011/12/17: [mH] Remove of the useless debug stuff | |
| 81 // 2012/02/24: [jDG] Remove missed stop bug. | |
| 82 // 2012/02/25: [jDG] Looking for a more stable LOW grad factor reference. | |
| 83 // 2012/09/10: [mH] Fill char_O_deco_time_for_log for logbook write | |
| 84 // 2012/10/05: [jDG] Better deco_gas_volumes accuracy (average depth, switch between stop). | |
| 85 // 2013/03/05: [jDG] Should vault low_depth too. | |
| 86 // 2013/03/05: [jDG] Wrobell remark: ascent_to_first_stop works better with finer steps (2sec). | |
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87 // 2013/05/08: [jDG] A. Salm remark: NOAA tables for CNS are in ATA, not bar. |
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88 // 2013/12/21: [jDG] Fix CNS calculation in decoplan w/o marked gas switch |
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89 // 2014/06/16: [jDG] Fix Helium diluant. Fix volumes with many travel mix. |
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90 // 2014/06/29: [mH] Compute int_O_ceiling |
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91 // 2015/06/12: [jDG] Fix NDL prediction while desaturating with the Buhlmann model. |
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92 // 2017/08/04: [mH] Switch to absolute GF everywhere and apply safety margin parameters to both models (GF and non-GF), fixes from Ralph Lembcke |
| 0 | 93 // |
| 94 // TODO: | |
| 95 // | |
| 96 // Literature: | |
| 313 | 97 // Buhlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
| 0 | 98 // 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 |
| 99 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
| 100 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
| 101 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
| 102 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
| 103 // | |
| 104 // | |
| 105 | |
| 106 // ********************* | |
| 107 // ** I N C L U D E S ** | |
| 108 // ********************* | |
| 109 #include <math.h> | |
| 110 | |
| 111 // *********************************************** | |
| 112 // ** V A R I A B L E S D E F I N I T I O N S ** | |
| 113 // *********************************************** | |
| 114 | |
| 115 #include "p2_definitions.h" | |
| 116 #define TEST_MAIN | |
| 117 #include "shared_definitions.h" | |
| 118 | |
| 519 | 119 // Water vapour partial pressure in the lungs |
| 0 | 120 #define ppWater 0.0627 |
| 121 #define METER_TO_BAR 0.09985 | |
| 122 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
| 123 | |
| 124 // Surface security factor | |
| 125 #define SURFACE_DESAT_FACTOR 0.7042 | |
| 126 | |
| 127 // ************************* | |
| 128 // ** P R O T O T Y P E S ** | |
| 129 // ************************* | |
| 130 | |
| 131 static void calc_hauptroutine(void); | |
| 132 static void calc_nullzeit(void); | |
| 133 | |
| 134 static void calc_tissue(PARAMETER unsigned char period); | |
| 135 static void calc_limit(void); | |
| 136 | |
| 137 static void clear_tissue(void); | |
| 138 static void calc_ascenttime(void); | |
| 139 static void update_startvalues(void); | |
| 140 static void clear_deco_table(void); | |
| 141 static unsigned char update_deco_table(void); | |
| 142 | |
| 143 static void sim_tissue(PARAMETER unsigned char period); | |
| 144 static void sim_limit(PARAMETER float GF_current); | |
| 145 static void sim_extra_time(void); | |
| 146 static void calc_dive_interval(void); | |
| 147 | |
| 148 static void calc_gradient_factor(void); | |
| 149 static void calc_wo_deco_step_1_min(void); | |
| 150 | |
| 151 static void calc_hauptroutine_data_input(void); | |
| 152 static void calc_hauptroutine_update_tissues(void); | |
| 153 static void calc_hauptroutine_calc_deco(void); | |
| 154 static void sim_ascent_to_first_stop(void); | |
| 155 | |
| 156 static unsigned char gas_switch_deepest(void); | |
| 157 static void gas_switch_set(void); | |
| 158 | |
| 159 static unsigned char calc_nextdecodepth(void); | |
| 160 | |
| 161 //---- Bank 5 parameters ----------------------------------------------------- | |
| 162 #ifndef UNIX | |
| 163 # pragma udata bank5=0x500 | |
| 164 #endif | |
| 165 | |
| 166 static float GF_low; | |
| 167 static float GF_high; | |
| 168 static float GF_delta; | |
| 169 static float locked_GF_step; // GF_delta / low_depth | |
| 170 | |
| 171 static unsigned char temp_depth_limit; | |
|
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172 float low_depth; // Depth of deepest stop |
| 0 | 173 |
| 174 // Simulation context: used to predict ascent. | |
| 175 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
| 176 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
| 177 | |
| 178 // Real context: what we are doing now. | |
| 179 static float calc_lead_tissue_limit; // | |
| 180 | |
| 181 static unsigned char internal_deco_time[NUM_STOPS]; | |
| 182 static unsigned char internal_deco_depth[NUM_STOPS]; | |
| 183 | |
| 184 static float cns_vault; | |
| 185 static float low_depth_vault; | |
| 186 static float pres_tissue_N2_vault[NUM_COMP]; | |
| 187 static float pres_tissue_He_vault[NUM_COMP]; | |
| 188 | |
| 189 //---- Bank 6 parameters ----------------------------------------------------- | |
| 190 #ifndef UNIX | |
| 191 # pragma udata bank6=0x600 | |
| 192 #endif | |
| 193 | |
| 194 static unsigned char ci; | |
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195 static float pres_respiration; |
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196 static float pres_surface; |
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197 static float temp_deco; |
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198 static float ppN2; |
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199 static float ppHe; |
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200 static float temp_tissue; |
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201 static float N2_ratio; // Breathed gas nitrogen ratio. |
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202 static float He_ratio; // Breathed gas helium ratio. |
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203 static float var_N2_a; // Buhlmann a, for current N2 tissue. |
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204 static float var_N2_b; // Buhlmann b, for current N2 tissue. |
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205 static float var_He_a; // Buhlmann a, for current He tissue. |
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206 static float var_He_b; // Buhlmann b, for current He tissue. |
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207 static float var_N2_e; // Exposition, for current N2 tissue. |
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208 static float var_He_e; // Exposition, for current He tissue. |
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209 static float var_N2_ht; // Half-time for current N2 tissue. |
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210 static float var_He_ht; // Half-time for current N2 tissue. |
| 0 | 211 |
| 212 static float pres_diluent; // new in v.101 | |
| 213 static float const_ppO2; // new in v.101 | |
| 214 | |
| 215 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. | |
| 216 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
| 217 static unsigned short sim_dive_mins; // Simulated dive time. | |
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218 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
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219 static float calc_He_ratio; // Simulated (switched) helium ratio. |
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220 static float CNS_fraction; // new in v.101 |
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221 static float float_saturation_multiplier; // new in v.101 |
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222 static float float_desaturation_multiplier; // new in v.101 |
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223 static float float_deco_distance; // new in v.101 |
| 0 | 224 |
| 225 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 | |
| 111 | 226 static unsigned char internal_deco_gas [NUM_STOPS]; |
| 0 | 227 |
| 228 //---- Bank 7 parameters ----------------------------------------------------- | |
| 229 #ifndef UNIX | |
| 230 # pragma udata bank7=0x700 | |
| 231 #endif | |
|
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232 // Keep order of 0x700 variables |
| 0 | 233 float pres_tissue_N2[NUM_COMP]; |
| 234 float pres_tissue_He[NUM_COMP]; | |
| 235 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. | |
| 236 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
| 237 | |
| 238 //---- Bank 8 parameters ----------------------------------------------------- | |
| 239 #ifndef UNIX | |
| 240 # pragma udata overlay bank8=0x800 | |
| 241 static char md_pi_subst[256]; | |
| 242 # define C_STACK md_pi_subst // Overlay C-code data stack here, too. | |
| 243 #endif | |
| 244 | |
| 245 // Back to bank6 for further tmp data | |
| 246 #ifndef UNIX | |
| 247 # pragma udata bank6 | |
| 248 #endif | |
| 249 | |
| 250 ////////////////////////////////////////////////////////////////////////////// | |
| 251 ////////////////////////////////////////////////////////////////////////////// | |
| 252 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
| 253 ////////////////////////////////////////////////////////////////////////////// | |
| 254 ////////////////////////////////////////////////////////////////////////////// | |
| 255 // | |
| 256 // End of PROM code is 17F00, So push tables on PROM top... | |
| 257 // | |
| 258 #ifndef UNIX | |
| 259 # pragma romdata buhlmann_tables = 0x1DD00 // Needs to be in UPPER bank. | |
| 260 #endif | |
| 261 | |
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262 rom const float buhlmann_ab[4*16] = { |
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263 // Data ZH-L16C, from Bühlmann Tauchmedizin 2002, option 1a (4mn) |
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264 // a for N2 b for N2 a of He b for He |
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265 1.2599, 0.5050, 1.7424, 0.4245, |
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266 1.0000, 0.6514, 1.3830, 0.5747, |
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267 0.8618, 0.7222, 1.1919, 0.6527, |
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268 0.7562, 0.7825, 1.0458, 0.7223, |
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269 0.6200, 0.8126, 0.9220, 0.7582, |
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270 0.5043, 0.8434, 0.8205, 0.7957, |
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271 0.4410, 0.8693, 0.7305, 0.8279, |
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272 0.4000, 0.8910, 0.6502, 0.8553, |
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273 0.3750, 0.9092, 0.5950, 0.8757, |
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274 0.3500, 0.9222, 0.5545, 0.8903, |
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275 0.3295, 0.9319, 0.5333, 0.8997, |
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276 0.3065, 0.9403, 0.5189, 0.9073, |
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277 0.2835, 0.9477, 0.5181, 0.9122, |
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278 0.2610, 0.9544, 0.5176, 0.9171, |
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279 0.2480, 0.9602, 0.5172, 0.9217, |
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280 0.2327, 0.9653, 0.5119, 0.9267 |
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281 }; |
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282 |
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283 rom const float buhlmann_ht[2*16] = { |
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284 // Compartiment half-life, in minute |
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285 //-- N2 ---- He --------------------------------------------------------------------- |
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286 4.0, 1.51, |
|
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287 8.0, 3.02, |
|
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288 12.5, 4.72, |
|
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289 18.5, 6.99, |
|
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|
290 27.0, 10.21, |
|
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291 38.3, 14.48, |
|
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292 54.3, 20.53, |
|
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293 77.0, 29.11, |
|
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294 109.0, 41.20, |
|
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|
295 146.0, 55.19, |
|
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296 187.0, 70.69, |
|
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|
297 239.0, 90.34, |
|
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|
298 305.0, 115.29, |
|
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299 390.0, 147.42, |
|
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|
300 498.0, 188.24, |
|
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|
301 635.0, 240.03 |
|
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|
302 }; |
|
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|
303 |
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304 rom const float e2secs[2*16] = { |
|
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305 // result of 1 - 2^(-1/(30sec*HT)) |
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306 //---- N2 ------------- He ------------ |
|
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307 5.75958E-03, 1.51848E-02, |
|
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|
308 2.88395E-03, 7.62144E-03, |
|
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|
309 1.84669E-03, 4.88315E-03, |
|
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|
310 1.24813E-03, 3.29997E-03, |
|
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|
311 8.55371E-04, 2.26041E-03, |
|
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|
312 6.03079E-04, 1.59437E-03, |
|
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|
313 4.25414E-04, 1.12479E-03, |
|
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|
314 3.00019E-04, 7.93395E-04, |
|
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|
315 2.11949E-04, 5.60641E-04, |
|
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heinrichsweikamp
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519
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|
316 1.58240E-04, 4.18555E-04, |
|
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|
317 1.23548E-04, 3.26795E-04, |
|
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519
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|
318 9.66686E-05, 2.55722E-04, |
|
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519
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|
319 7.57509E-05, 2.00387E-04, |
|
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heinrichsweikamp
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519
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|
320 5.92416E-05, 1.56716E-04, |
|
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519
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|
321 4.63943E-05, 1.22734E-04, |
|
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|
322 3.63850E-05, 9.62538E-05 |
|
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323 //------------------------------------- |
|
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324 }; |
|
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325 |
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326 rom const float e1min[2*16] = { |
|
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327 // Integration constant for 1 minute, |
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328 // Ie. 1- 2^(-1/HT) |
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329 //----- N2 --------- e 1min He -------- |
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330 1.59104E-01, 3.68109E-01, |
|
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519
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|
331 8.29960E-02, 2.05084E-01, |
|
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519
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|
332 5.39424E-02, 1.36579E-01, |
|
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|
333 3.67742E-02, 9.44046E-02, |
|
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519
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|
334 2.53454E-02, 6.56359E-02, |
|
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heinrichsweikamp
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519
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|
335 1.79351E-02, 4.67416E-02, |
|
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|
336 1.26840E-02, 3.31991E-02, |
|
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|
337 8.96152E-03, 2.35301E-02, |
|
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|
338 6.33897E-03, 1.66832E-02, |
|
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|
339 4.73633E-03, 1.24808E-02, |
|
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|
340 3.69981E-03, 9.75753E-03, |
|
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|
341 2.89600E-03, 7.64329E-03, |
|
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|
342 2.27003E-03, 5.99417E-03, |
|
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|
343 1.77572E-03, 4.69082E-03, |
|
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|
344 1.39089E-03, 3.67548E-03, |
|
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|
345 1.09097E-03, 2.88359E-03 |
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|
346 //------------------------------------- |
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347 }; |
|
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348 |
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|
349 rom const float e10min[2*16] = { |
|
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350 // The 10 min Value in float notation: |
|
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351 // result of 1 - 2^(-10/ht) |
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352 //---- N2 -------------- He ----------- |
|
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|
353 8.23223E-01, 9.89851E-01, |
|
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heinrichsweikamp
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|
354 5.79552E-01, 8.99258E-01, |
|
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heinrichsweikamp
parents:
519
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|
355 4.25651E-01, 7.69737E-01, |
|
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heinrichsweikamp
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|
356 3.12487E-01, 6.29027E-01, |
|
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heinrichsweikamp
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|
357 2.26416E-01, 4.92821E-01, |
|
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changeset
|
358 1.65547E-01, 3.80407E-01, |
|
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heinrichsweikamp
parents:
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changeset
|
359 1.19840E-01, 2.86538E-01, |
|
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heinrichsweikamp
parents:
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changeset
|
360 8.60863E-02, 2.11886E-01, |
|
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heinrichsweikamp
parents:
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changeset
|
361 6.16117E-02, 1.54849E-01, |
|
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|
362 4.63665E-02, 1.18026E-01, |
|
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|
363 3.63881E-02, 9.34005E-02, |
|
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|
364 2.85855E-02, 7.38569E-02, |
|
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|
365 2.24698E-02, 5.83504E-02, |
|
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heinrichsweikamp
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|
366 1.76160E-02, 4.59303E-02, |
|
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heinrichsweikamp
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|
367 1.38222E-02, 3.61528E-02, |
|
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|
368 1.08563E-02, 2.84646E-02 |
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|
369 //------------------------------------- |
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370 }; |
| 0 | 371 |
| 372 ////////////////////////////////////////////////////////////////////////////// | |
| 373 ////////////////////////////////////////////////////////////////////////////// | |
| 374 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
| 375 ////////////////////////////////////////////////////////////////////////////// | |
| 376 ////////////////////////////////////////////////////////////////////////////// | |
| 377 // | |
| 378 // all new in v.102 | |
| 379 // moved from 0x0D000 to 0x0C000 in v.108 | |
| 380 #ifndef UNIX | |
| 381 # pragma code p2_deco = 0x0C000 | |
| 382 #endif | |
| 383 | |
| 384 ////////////////////////////////////////////////////////////////////////////// | |
| 385 ////////////////////////////////////////////////////////////////////////////// | |
| 386 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
| 387 ////////////////////////////////////////////////////////////////////////////// | |
| 388 ////////////////////////////////////////////////////////////////////////////// | |
| 389 | |
| 390 ////////////////////////////////////////////////////////////////////////////// | |
| 391 // Bump to blue-screen when an assert is wrong | |
| 392 #ifdef __DEBUG | |
| 393 void assert_failed(PARAMETER short int line) | |
| 394 { | |
| 395 } | |
| 396 #endif | |
| 397 | |
| 398 ////////////////////////////////////////////////////////////////////////////// | |
| 399 // When calling C code from ASM context, the data stack pointer and | |
| 400 // frames should be reset. Bank8 is used by stack | |
| 401 | |
| 402 #ifdef CROSS_COMPILE | |
| 403 # define RESET_C_STACK | |
| 404 #else | |
| 405 # ifdef __DEBUG | |
| 406 # define RESET_C_STACK fillDataStack(); | |
| 407 void fillDataStack(void) | |
| 408 { | |
| 409 _asm | |
| 410 LFSR 1,C_STACK | |
| 411 MOVLW 0xCC | |
| 412 loop: MOVWF POSTINC1,0 | |
| 413 TSTFSZ FSR1L,0 | |
| 414 BRA loop | |
| 415 | |
| 416 LFSR 1,C_STACK | |
| 417 LFSR 2,C_STACK | |
| 418 _endasm | |
| 419 } | |
| 420 # else | |
| 421 # define RESET_C_STACK \ | |
| 422 _asm \ | |
| 423 LFSR 1, C_STACK \ | |
| 424 LFSR 2, C_STACK \ | |
| 425 _endasm | |
| 426 # endif | |
| 427 #endif | |
| 428 | |
| 429 ////////////////////////////////////////////////////////////////////////////// | |
| 430 // Fast subroutine to read timer 5. | |
| 313 | 431 // Note: result is in 1/32 of msecs (30,51757813 us/bit to be precise) |
| 0 | 432 static unsigned short tmr5(void) |
| 433 { | |
| 434 #ifndef CROSS_COMPILE | |
| 435 _asm | |
| 436 movff 0xf7c,PRODL // TMR5L | |
| 437 movff 0xf7d,PRODH // TMR5H | |
| 438 _endasm // result in PRODH:PRODL. | |
| 439 #else | |
| 440 return 0; | |
| 441 #endif | |
| 442 } | |
| 443 | |
| 444 | |
| 445 ////////////////////////////////////////////////////////////////////////////// | |
| 446 // read buhlmann tables A and B for compatriment ci | |
| 447 // | |
| 448 static void read_buhlmann_coefficients(void) | |
| 449 { | |
| 450 #ifndef CROSS_COMPILE | |
| 451 // Note: we don't use far rom pointer, because the | |
| 452 // 24 bits is too complex, hence we have to set | |
| 453 // the UPPER page ourself... | |
| 454 // --> Set zero if tables are moved to lower pages ! | |
| 455 _asm | |
| 456 movlw 1 | |
| 457 movwf TBLPTRU,0 | |
| 458 _endasm | |
| 459 #endif | |
| 460 | |
| 461 assert( ci < NUM_COMP ); | |
| 462 | |
| 463 // Use an interleaved array (AoS) to access coefficients with a | |
| 464 // single addressing. | |
| 465 { | |
| 466 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
| 467 var_N2_a = *ptr++; | |
| 468 var_N2_b = *ptr++; | |
| 469 var_He_a = *ptr++; | |
| 470 var_He_b = *ptr++; | |
| 471 } | |
| 472 } | |
| 473 | |
| 474 ////////////////////////////////////////////////////////////////////////////// | |
| 475 // read buhlmann tables for compatriment ci | |
| 476 // If period == 0 : 2sec interval | |
| 477 // 1 : 1 min interval | |
| 478 // 2 : 10 min interval. | |
| 479 static void read_buhlmann_times(PARAMETER char period) | |
| 480 { | |
| 481 #ifndef CROSS_COMPILE | |
| 482 // Note: we don't use far rom pointer, because the | |
| 483 // 24 bits is to complex, hence we have to set | |
| 484 // the UPPER page ourself... | |
| 485 // --> Set zero if tables are moved to lower pages ! | |
| 486 _asm | |
| 487 movlw 1 | |
| 488 movwf TBLPTRU,0 | |
| 489 _endasm | |
| 490 #endif | |
| 491 | |
| 492 assert( ci < NUM_COMP ); | |
| 493 | |
| 494 // Integration intervals. | |
| 495 switch(period) | |
| 496 { | |
| 497 case 0: //---- 2 sec ----------------------------------------------------- | |
| 498 { | |
| 499 overlay rom const float* ptr = &e2secs[2*ci]; | |
| 500 var_N2_e = *ptr++; | |
| 501 var_He_e = *ptr++; | |
| 502 } | |
| 503 break; | |
| 504 | |
| 505 case 1: //---- 1 min ----------------------------------------------------- | |
| 506 { | |
| 507 overlay rom const float* ptr = &e1min[2*ci]; | |
| 508 var_N2_e = *ptr++; | |
| 509 var_He_e = *ptr++; | |
| 510 } | |
| 511 break; | |
| 512 | |
| 513 case 2: //---- 10 min ---------------------------------------------------- | |
| 514 { | |
| 515 overlay rom const float* ptr = &e10min[2*ci]; | |
| 516 var_N2_e = *ptr++; | |
| 517 var_He_e = *ptr++; | |
| 518 } | |
| 519 break; | |
| 520 | |
| 521 default: | |
| 522 assert(0); // Never go there... | |
| 523 } | |
| 524 } | |
| 525 | |
| 526 ////////////////////////////////////////////////////////////////////////////// | |
| 527 // read buhlmann tables for compatriment ci | |
| 528 // | |
| 529 static void read_buhlmann_ht(void) | |
| 530 { | |
| 531 | |
| 532 #ifndef CROSS_COMPILE | |
| 533 // Note: we don't use far rom pointer, because the | |
| 534 // 24 bits is to complex, hence we have to set | |
| 535 // the UPPER page ourself... | |
| 536 // --> Set zero if tables are moved to lower pages ! | |
| 537 _asm | |
| 538 movlw 1 | |
| 539 movwf TBLPTRU,0 | |
| 540 _endasm | |
| 541 #endif | |
| 542 | |
| 543 assert( ci < NUM_COMP ); | |
| 544 { | |
| 545 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
| 546 var_N2_ht = *ptr++; | |
| 547 var_He_ht = *ptr++; | |
| 548 } | |
| 549 | |
| 550 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
| 551 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
| 552 } | |
| 553 | |
| 554 ////////////////////////////////////////////////////////////////////////////// | |
| 555 // calc_nextdecodepth | |
| 556 // | |
| 557 // new in v.102 | |
| 558 // | |
| 559 // INPUT, changing during dive: | |
| 560 // temp_deco | |
| 561 // low_depth | |
| 562 // | |
| 563 // INPUT, fixed during dive: | |
| 564 // pres_surface | |
| 565 // GF_delta | |
| 566 // GF_high | |
| 567 // GF_low | |
| 568 // char_I_depth_last_deco | |
| 569 // float_deco_distance | |
| 570 // | |
| 571 // RETURN TRUE iff a stop is needed. | |
| 572 // | |
| 573 // OUTPUT | |
| 574 // locked_GF_step | |
| 575 // temp_depth_limt | |
| 576 // low_depth | |
| 577 // | |
| 578 static unsigned char calc_nextdecodepth(void) | |
| 579 { | |
| 580 //--- Max ascent speed --------------------------------------------------- | |
| 581 // Recompute leading gas limit, at current depth: | |
| 582 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; | |
| 583 | |
| 584 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
| 585 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; | |
| 586 | |
| 587 // Do we need to stop at current depth ? | |
| 588 overlay unsigned char need_stop = 0; | |
| 589 | |
| 590 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
| 591 | |
| 592 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ | |
|
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593 if( char_I_deco_model != 0 ) |
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594 { |
| 0 | 595 overlay unsigned char first_stop = 0; |
| 596 overlay float p; | |
| 597 | |
| 598 sim_limit( GF_low ); | |
| 599 p = sim_lead_tissue_limit - pres_surface; | |
| 600 if( p <= 0.0f ) | |
| 601 goto no_deco_stop; // We can surface directly... | |
| 602 | |
| 603 p *= BAR_TO_METER; | |
|
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604 |
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605 // Store the deepest point needing a deco stop as the LOW reference for GF. |
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606 // NOTE: following stops will be validated using this LOW-HIGH gf scale, |
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607 // so if we want to keep coherency, we should not validate this stop |
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608 // yet, but apply the search to it, as for all the following stops afterward. |
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609 if( p > low_depth ) |
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610 { |
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611 low_depth = p; |
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612 locked_GF_step = GF_delta / low_depth; |
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613 } |
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614 |
| 0 | 615 if( p < min_depth ) |
| 616 goto no_deco_stop; // First stop is higher than 1' ascent. | |
| 617 | |
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618 // Round to multiple of 3m. |
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619 first_stop = 3 * (short)(0.9995f + p*0.333333f); |
| 0 | 620 assert( first_stop < 128 ); |
| 621 | |
| 622 // Apply correction for the shallowest stop. | |
| 623 if( first_stop == 3 ) // new in v104 | |
| 624 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
| 625 | |
| 626 // We have a stop candidate. | |
| 627 // But maybe ascending to the next stop will diminish the constraint, | |
| 628 // because the GF might decrease more than the preassure gradient... | |
| 629 while(first_stop > 0) | |
| 630 { | |
| 631 overlay unsigned char next_stop; // Next depth (0..90m) | |
| 632 | |
| 633 // Check max speed, or reaching surface. | |
| 634 if( first_stop <= min_depth ) | |
| 635 goto no_deco_stop; | |
| 636 | |
| 637 if( first_stop <= char_I_depth_last_deco ) // new in v104 | |
| 638 next_stop = 0; | |
| 639 else if( first_stop == 6 ) | |
| 640 next_stop = char_I_depth_last_deco; | |
| 641 else | |
| 642 next_stop = first_stop - 3; // Index of next (upper) stop. | |
| 643 | |
| 644 // Total preassure at the new stop candidate: | |
|
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645 p = next_stop * METER_TO_BAR |
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646 + pres_surface; |
| 0 | 647 |
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648 // Recompute limit for this new stop: |
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649 if( !low_depth || next_stop > low_depth ) |
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650 sim_limit( GF_low ); |
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651 else |
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652 sim_limit( GF_high - next_stop * locked_GF_step ); |
| 0 | 653 |
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654 // Check upper limit (lowest ambiant pressure tolerated): |
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655 if( sim_lead_tissue_limit >= p ) |
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656 goto deco_stop_found; // Ascent to next_stop forbiden. |
| 0 | 657 |
| 658 // Else, validate that stop and loop... | |
| 659 first_stop = next_stop; | |
| 660 } | |
| 661 | |
| 662 no_deco_stop: | |
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663 temp_depth_limit = min_depth; |
| 0 | 664 goto done; |
| 665 | |
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666 deco_stop_found: |
| 0 | 667 // next stop is the last validated depth found, aka first_stop |
| 668 need_stop = 1; // Hit. | |
| 669 temp_depth_limit = first_stop; // Stop depth, in meter. | |
| 670 | |
| 671 done: | |
| 672 ; | |
| 673 } | |
| 674 else //---- ZH-L16 model ------------------------------------------------- | |
| 675 { | |
| 676 overlay float pres_gradient; | |
| 677 | |
| 678 // Original model | |
| 679 // optimized in v.101 | |
| 680 // char_I_depth_last_deco included in v.101 | |
| 681 | |
| 682 // Compute sim_lead_tissue_limit too, but just once. | |
| 683 sim_limit(1.0); | |
| 684 | |
| 685 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
| 686 if (pres_gradient >= 0) | |
| 687 { | |
| 379 | 688 pres_gradient *= BAR_TO_METER/3; // bar --> stop number; |
| 0 | 689 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
| 690 need_stop = 1; // Hit. | |
| 691 | |
| 692 // Implement last stop at 4m/5m/6m... | |
| 693 if( temp_depth_limit == 3 ) | |
| 694 temp_depth_limit = char_I_depth_last_deco; | |
| 695 } | |
| 696 else | |
| 697 temp_depth_limit = 0; | |
| 698 } | |
| 699 | |
| 700 //---- Check gas change -------------------------------------------------- | |
| 701 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, | |
| 702 | |
| 703 return need_stop; | |
| 704 } | |
| 705 | |
| 706 ////////////////////////////////////////////////////////////////////////////// | |
| 707 // copy_deco_table | |
| 708 // | |
| 709 // Buffer the stops, once computed, so we can continue to display them | |
| 710 // while computing the next set. | |
| 711 // | |
| 712 static void copy_deco_table(void) | |
| 713 { | |
| 714 // Copy depth of the first (deepest) stop, because when reversing | |
| 715 // order, it will be hard to find... | |
| 111 | 716 char_O_first_deco_depth = internal_deco_depth[0]; |
| 0 | 717 char_O_first_deco_time = internal_deco_time [0]; |
| 718 | |
| 719 { | |
| 720 overlay unsigned char x, y; | |
| 721 | |
| 722 for(x=0; x<NUM_STOPS; x++) | |
| 723 { | |
| 724 char_O_deco_depth[x] = internal_deco_depth[x]; | |
| 725 char_O_deco_time [x] = internal_deco_time [x]; | |
| 111 | 726 char_O_deco_gas [x] = internal_deco_gas [x]; |
| 0 | 727 } |
| 728 | |
| 729 //Now fill the char_O_deco_time_for_log array | |
| 730 //---- First: search the first non-null depth | |
| 731 for(x=(NUM_STOPS-1); x != 0; --x) | |
| 732 if( internal_deco_depth[x] != 0 ) break; | |
| 733 | |
| 734 //---- Second: copy to output table (in reverse order) | |
| 735 for(y=0; y<NUM_STOPS; y++, --x) | |
| 736 { | |
| 737 char_O_deco_time_for_log[y] = internal_deco_time [x]; | |
| 738 | |
| 739 // Stop only once the last transfer is done. | |
| 740 if( x == 0 ) break; | |
| 741 } | |
| 742 | |
| 743 //---- Third: fill table end with null | |
| 744 for(y++; y<NUM_STOPS; y++) | |
| 745 { | |
| 746 char_O_deco_time_for_log [y] = 0; | |
| 747 } | |
| 748 } | |
| 749 } | |
| 750 | |
| 751 ////////////////////////////////////////////////////////////////////////////// | |
| 752 // temp_tissue_safety // | |
| 753 // | |
| 754 // outsourced in v.102 | |
| 755 // | |
|
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756 // Apply safety factors for both ZH-L16 models. |
| 0 | 757 // |
| 758 static void temp_tissue_safety(void) | |
| 759 { | |
| 760 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); | |
| 761 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
| 762 | |
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763 if( temp_tissue < 0.0 ) |
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764 temp_tissue *= float_desaturation_multiplier; |
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765 else |
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766 temp_tissue *= float_saturation_multiplier; |
| 0 | 767 } |
| 768 | |
| 769 ////////////////////////////////////////////////////////////////////////////// | |
| 770 ////////////////////////////////////////////////////////////////////////////// | |
| 771 // ** THE JUMP-IN CODE ** | |
| 772 // ** for the asm code ** | |
| 773 ////////////////////////////////////////////////////////////////////////////// | |
| 774 ////////////////////////////////////////////////////////////////////////////// | |
| 775 | |
| 776 ////////////////////////////////////////////////////////////////////////////// | |
| 777 // Called every 2 seconds during diving. | |
| 778 // update tissues every time. | |
| 779 // | |
| 780 // Every 6 seconds (or slower when TTS > 16): | |
| 781 // - update deco table (char_O_deco_time/depth) with new values. | |
| 782 // - update ascent time, | |
| 783 // - set status to zero (so we can check there is new results). | |
| 784 // | |
| 785 void deco_calc_hauptroutine(void) | |
| 786 { | |
| 787 RESET_C_STACK | |
| 788 calc_hauptroutine(); | |
| 789 int_O_desaturation_time = 65535; | |
| 790 } | |
| 791 | |
| 792 ////////////////////////////////////////////////////////////////////////////// | |
| 793 // Reset decompression model: | |
| 794 // + Set all tissues to equilibrium with Air at ambient pressure. | |
| 795 // + Reset last stop to 0m | |
| 796 // + Reset all model output. | |
| 797 void deco_clear_tissue(void) | |
| 798 { | |
| 799 RESET_C_STACK | |
| 800 clear_tissue(); | |
| 801 } | |
| 802 | |
| 803 ////////////////////////////////////////////////////////////////////////////// | |
| 804 // Called every 1 min during decoplanning. | |
| 805 // Update tissues for 1 min. | |
| 806 // | |
| 807 void deco_calc_tissue(void) | |
| 808 { | |
| 809 RESET_C_STACK | |
| 810 calc_hauptroutine_update_tissues(); | |
| 811 } | |
| 812 | |
| 813 ////////////////////////////////////////////////////////////////////////////// | |
| 814 | |
| 815 void deco_calc_wo_deco_step_1_min(void) | |
| 816 { | |
| 817 RESET_C_STACK | |
| 818 calc_wo_deco_step_1_min(); | |
| 819 deco_calc_desaturation_time(); | |
| 820 } | |
| 821 | |
| 822 ////////////////////////////////////////////////////////////////////////////// | |
| 823 | |
| 824 void deco_calc_dive_interval(void) | |
| 825 { | |
| 826 RESET_C_STACK | |
| 827 calc_dive_interval(); | |
| 828 } | |
| 829 | |
| 830 ////////////////////////////////////////////////////////////////////////////// | |
| 831 // Find current gas in the list (if any). | |
| 832 // | |
| 833 // Input: char_I_current_gas = 1..6 | |
| 834 // | |
| 835 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. | |
| 836 // | |
| 837 static void gas_switch_find_current(void) | |
| 838 { | |
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839 assert( 0 < char_I_current_gas && char_I_current_gas <= (2*NUM_GAS) ); |
| 0 | 840 |
| 841 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 | |
| 842 { | |
| 843 sim_gas_last_used = char_I_current_gas; | |
| 844 | |
| 845 // Note: if current is first gas, we must find it, but not set | |
| 846 // last depth change to surface. | |
| 847 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
| 848 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
| 849 } | |
| 850 else | |
| 851 sim_gas_last_used = 0; // Gas 6 = manual set | |
| 852 } | |
| 853 | |
| 854 ////////////////////////////////////////////////////////////////////////////// | |
| 855 // Find deepest available gas. | |
| 856 // | |
| 857 // Input: temp_depth_limit, | |
| 858 // deco_gas_change[] | |
| 859 // sim_gas_depth_used, sim_dive_mins. | |
| 860 // | |
| 861 // RETURNS TRUE if a stop is needed for gas switch. | |
| 862 // | |
| 863 // Output: temp_depth_limit, sim_gas_depth_used IFF the is a switch. | |
| 864 // | |
| 865 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used | |
| 866 // are null), or during the ascent to make sure we are not passing a | |
| 867 // stop (in which case both can be already set). | |
| 868 // | |
| 869 static unsigned char gas_switch_deepest(void) | |
| 870 { | |
| 871 overlay unsigned char switch_deco = 0, switch_last = 0; | |
| 872 | |
| 873 if (char_I_const_ppO2 == 0) | |
| 874 { | |
| 875 overlay unsigned char j; | |
| 876 | |
| 877 // Loop over all enabled gas, to find the deepest one, | |
| 878 // above last used gas, but below temp_depth_limit. | |
| 879 for(j=0; j<NUM_GAS; ++j) | |
| 880 { | |
| 881 // Gas not (yet) allowed ? Skip ! | |
| 882 if( temp_depth_limit > deco_gas_change[j] ) | |
| 883 continue; | |
| 884 | |
| 885 // Gas deeper (or equal) than the current one ? Skip ! | |
| 886 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) | |
| 887 continue; | |
| 888 | |
| 889 // First, or deeper ? | |
| 890 if( switch_deco < deco_gas_change[j] ) | |
| 891 { | |
| 892 switch_deco = deco_gas_change[j]; | |
| 893 switch_last = j+1; // 1..5 | |
| 894 } | |
| 895 } | |
| 896 } | |
| 897 | |
| 898 // If there is a better gas available | |
| 899 if( switch_deco ) | |
| 900 { | |
| 901 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); | |
| 902 | |
| 903 sim_gas_last_depth = switch_deco; | |
| 904 sim_gas_last_used = switch_last; | |
| 905 } | |
| 906 return 0; | |
| 907 } | |
| 908 | |
| 909 ////////////////////////////////////////////////////////////////////////////// | |
| 910 // Calculate gas switches | |
| 911 // | |
| 912 // | |
| 913 // Input: N2_ratio, He_ratio. | |
| 914 // sim_gas_last_used | |
| 915 // | |
| 916 // Output: calc_N2_ratio, calc_He_ratio | |
| 917 // | |
| 918 static void gas_switch_set(void) | |
| 919 { | |
| 920 assert( sim_gas_last_used <= NUM_GAS ); | |
| 921 | |
| 922 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. | |
| 923 { | |
| 924 calc_N2_ratio = N2_ratio; | |
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925 calc_He_ratio = He_ratio; |
| 0 | 926 } |
| 927 else | |
| 928 { | |
| 929 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
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930 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; |
| 0 | 931 } |
| 932 | |
| 933 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
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934 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 1.00 ); |
| 0 | 935 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); |
| 936 } | |
| 937 | |
| 938 ////////////////////////////////////////////////////////////////////////////// | |
| 939 // | |
| 940 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. | |
| 941 // temp_deco : simulated respiration pressure | |
| 942 // float_deco_distance : security factor. | |
| 943 // Water-vapor pressure inside limbs (ppWater). | |
| 944 // | |
| 945 // Output: ppN2, ppHe. | |
| 946 // | |
| 947 static void sim_alveolar_presures(void) | |
| 948 { | |
| 949 overlay float deco_diluent = temp_deco; // new in v.101 | |
| 950 | |
| 951 // Take deco offset into account, but not at surface. | |
| 952 // Note: this should be done on ambiant pressure, hence before | |
| 953 // computing the diluant partial pressure... | |
| 954 if( deco_diluent > pres_surface ) | |
| 955 deco_diluent += float_deco_distance; | |
| 956 | |
| 957 //---- CCR mode : deco gas switch ? -------------------------------------- | |
| 958 if( char_I_const_ppO2 != 0 ) | |
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959 { |
| 0 | 960 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
| 961 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
| 962 // ppWater in the equations below: | |
| 963 deco_diluent -= const_ppO2; | |
| 964 deco_diluent /= calc_N2_ratio + calc_He_ratio; | |
| 965 | |
| 966 if (deco_diluent > temp_deco) | |
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967 deco_diluent = temp_deco; |
|
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968 } |
| 0 | 969 |
| 970 if( deco_diluent > ppWater ) | |
| 971 { | |
| 972 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); | |
| 973 ppHe = calc_He_ratio * (deco_diluent - ppWater); | |
| 974 } | |
| 975 else | |
| 976 { | |
| 977 ppN2 = 0.0; | |
| 978 ppHe = 0.0; | |
| 979 } | |
| 980 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); | |
| 981 assert( 0.0 <= ppHe && ppHe < 14.0 ); | |
| 982 } | |
| 983 | |
| 984 ////////////////////////////////////////////////////////////////////////////// | |
| 985 // clear_tissue | |
| 986 // | |
| 987 // optimized in v.101 (var_N2_a) | |
| 988 // | |
| 989 // preload tissues with standard pressure for the given ambient pressure. | |
| 990 // Note: fixed N2_ratio for standard air. | |
| 991 // | |
| 992 static void clear_tissue(void) | |
| 993 { | |
| 994 overlay float p; | |
| 995 | |
| 996 // Kludge: the 0.0002 of 0.7902 are missing with standard air. | |
| 997 N2_ratio = 0.7902; | |
| 998 pres_respiration = int_I_pres_respiration * 0.001; | |
| 999 | |
| 1000 p = N2_ratio * (pres_respiration - ppWater); | |
| 1001 for(ci=0; ci<NUM_COMP; ci++) | |
| 1002 { | |
| 313 | 1003 // cycle through the 16 Buhlmann N2 tissues |
| 0 | 1004 pres_tissue_N2[ci] = p; |
| 1005 | |
| 313 | 1006 // cycle through the 16 Buhlmann tissues for Helium |
| 0 | 1007 pres_tissue_He[ci] = 0.0; |
| 1008 } | |
| 1009 | |
| 1010 clear_deco_table(); | |
| 1011 char_O_deco_status = 0; | |
| 1012 char_O_nullzeit = 0; | |
| 1013 int_O_ascenttime = 0; | |
| 1014 char_O_gradient_factor = 0; | |
| 1015 | |
| 1016 calc_lead_tissue_limit = 0.0; | |
| 1017 char_O_gtissue_no = 0; | |
| 1018 } | |
| 1019 | |
| 1020 ////////////////////////////////////////////////////////////////////////////// | |
| 1021 // calc_hauptroutine | |
| 1022 // | |
| 1023 // this is the major code in dive mode calculates: | |
| 1024 // the tissues, | |
| 1025 // the bottom time, | |
| 1026 // and simulates the ascend with all deco stops. | |
| 1027 // | |
| 1028 // The deco_state sequence is : | |
| 1029 // 3 (at surface) | |
| 1030 // +---> 0 : calc nullzeit | |
| 1031 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
| 1032 // | +-> 1 : simulate up to 16min of stops. | |
| 1033 // | +------< not finished | |
| 1034 // +--------< finish | |
| 1035 // | |
| 1036 // Added steps 6,5 for @+5 calculation: | |
| 1037 // 6 = ascent to first stop (same as 2), except continue to 7 | |
| 1038 // 7 = same as 1, except loop to 7. | |
| 1039 // | |
| 1040 static void calc_hauptroutine(void) | |
| 1041 { | |
|
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1042 static unsigned char backup_gas_used = 0; |
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1043 static unsigned char backup_gas_depth = 0; |
| 0 | 1044 |
| 1045 calc_hauptroutine_data_input(); | |
| 1046 | |
| 1047 calc_hauptroutine_update_tissues(); | |
| 1048 calc_gradient_factor(); | |
| 1049 | |
| 1050 // toggle between calculation for nullzeit (bottom time), | |
| 1051 // deco stops | |
| 1052 // and more deco stops (continue) | |
| 1053 switch( char_O_deco_status ) | |
| 1054 { | |
| 1055 case 3: //---- At surface: start a new dive ------------------------------ | |
|
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1056 clear_deco_table(); |
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1057 copy_deco_table(); |
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1058 int_O_ascenttime = 0; // Reset DTR. |
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1059 int_O_extra_ascenttime = 0; |
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1060 char_O_nullzeit = 0; // Reset bottom time. |
| 0 | 1061 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
| 1062 | |
| 1063 // Values that should be reset just once for the full real dive. | |
| 1064 // This is used to record the lowest stop for the whole dive, | |
| 1065 // Including ACCROSS all simulated ascent. | |
|
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1066 low_depth = 0.0; |
| 0 | 1067 locked_GF_step = 0.0; |
| 1068 | |
| 1069 // Reset gas switch history. | |
| 1070 backup_gas_used = sim_gas_last_used = 0; | |
| 1071 backup_gas_depth = sim_gas_last_depth = 0; | |
| 1072 sim_dive_mins = 0; | |
| 1073 break; | |
| 1074 | |
| 1075 case 0: //---- bottom time ----------------------------------------------- | |
| 1076 default: | |
| 1077 gas_switch_find_current(); // Lookup for current gas & time. | |
| 1078 gas_switch_set(); // setup calc_ratio's | |
| 1079 | |
|
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1080 calc_nullzeit(); |
| 0 | 1081 if( char_O_nullzeit > 0 ) // Some NDL time left ? |
| 1082 { | |
| 1083 char_O_deco_status = 0; // YES: recalc ndl next time. | |
| 1084 clear_deco_table(); // Also clear stops ! | |
| 1085 copy_deco_table(); | |
| 1086 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) | |
| 1087 } | |
| 1088 else | |
| 1089 char_O_deco_status = 2; // NO: calc ascent next time. | |
|
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1090 break; |
| 0 | 1091 |
| 1092 case 2: //---- Simulate ascent to first stop ----------------------------- | |
| 1093 case 6: // @+5min variation | |
| 1094 // Check proposed gas at begin of ascent simulation | |
| 1095 sim_dive_mins = int_I_divemins; // Init current time. | |
| 1096 | |
|
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1097 gas_switch_find_current(); // Lookup for current gas & time. |
| 0 | 1098 gas_switch_set(); // setup calc_ratio's |
| 1099 | |
| 1100 backup_gas_used = sim_gas_last_used; // And save for later simu steps. | |
| 1101 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. | |
| 1102 | |
|
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1103 sim_ascent_to_first_stop(); |
| 0 | 1104 |
| 1105 // Calc stops next time (deco or gas switch). | |
| 1106 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); | |
|
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1107 break; |
| 0 | 1108 |
| 1109 case 1: //---- Simulate stops -------------------------------------------- | |
| 1110 case 5: // @+5 variation. | |
|
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1111 calc_hauptroutine_calc_deco(); |
| 0 | 1112 |
| 1113 // If simulation is finished, restore the GF low reference, so that | |
| 1114 // next ascent simulation is done from the current depth: | |
|
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1115 if( (char_O_deco_status & 3) == 0 ) |
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1116 { |
| 0 | 1117 sim_gas_last_used = backup_gas_used; |
| 1118 sim_gas_last_depth = backup_gas_depth; | |
| 1119 } | |
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1120 break; |
| 0 | 1121 } |
| 1122 } | |
| 1123 | |
| 1124 ////////////////////////////////////////////////////////////////////////////// | |
| 1125 // calc_hauptroutine_data_input | |
| 1126 // | |
| 1127 // Reset all C-code dive parameters from their ASM-code values. | |
| 1128 // Detect gas change condition. | |
| 1129 // | |
| 1130 void calc_hauptroutine_data_input(void) | |
| 1131 { | |
| 1132 overlay short int_temp; | |
| 1133 overlay unsigned char g; | |
| 1134 | |
| 1135 pres_respiration = int_I_pres_respiration * 0.001; | |
| 1136 pres_surface = int_I_pres_surface * 0.001; | |
| 1137 N2_ratio = char_I_N2_ratio * 0.01; | |
| 1138 He_ratio = char_I_He_ratio * 0.01; | |
| 379 | 1139 float_deco_distance = char_I_deco_distance * 0.01; // Get offset in mbar |
| 0 | 1140 |
| 1141 // ____________________________________________________ | |
| 1142 // | |
| 1143 // _____________ G A S _ C H A N G E S ________________ | |
| 1144 // ____________________________________________________ | |
| 1145 | |
| 1146 // Keep a margin of 150mbar = 1.50m | |
| 1147 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
| 1148 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
| 1149 | |
| 1150 // Gas are selectable if we did not pass the change depth by more than 1.50m: | |
| 1151 for(g=0; g < NUM_GAS; ++g) | |
| 1152 { | |
| 1153 deco_gas_change[g] = 0; | |
| 1154 if(char_I_deco_gas_change[g]) | |
| 1155 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) | |
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1156 deco_gas_change[g] = char_I_deco_gas_change[g]; |
| 0 | 1157 } |
| 1158 | |
| 1159 const_ppO2 = char_I_const_ppO2 * 0.01; | |
| 1160 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
| 1161 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1162 GF_low = char_I_GF_Low_percentage * 0.01; | |
| 1163 GF_high = char_I_GF_High_percentage * 0.01; | |
| 1164 GF_delta = GF_high - GF_low; | |
| 1165 } | |
| 1166 | |
| 1167 ////////////////////////////////////////////////////////////////////////////// | |
| 1168 // | |
| 1169 // | |
| 1170 void calc_hauptroutine_update_tissues(void) | |
| 1171 { | |
| 1172 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); | |
| 1173 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
|
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|
1174 assert( (N2_ratio + He_ratio) <= 1.00 ); |
| 0 | 1175 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
| 1176 | |
| 1177 pres_diluent = pres_respiration; | |
| 1178 if( char_I_const_ppO2 != 0 ) | |
| 1179 { | |
| 1180 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); | |
| 1181 | |
| 1182 pres_diluent -= const_ppO2; | |
| 1183 pres_diluent /= N2_ratio + He_ratio; | |
| 1184 if( pres_diluent < 0.0 ) | |
| 1185 pres_diluent = 0.0; | |
| 1186 if( pres_diluent > pres_respiration ) | |
| 1187 pres_diluent = pres_respiration; | |
| 1188 | |
| 1189 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); | |
| 1190 | |
| 1191 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; | |
| 1192 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; | |
| 1193 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
| 1194 } | |
| 1195 | |
| 1196 if( pres_diluent > ppWater ) | |
| 1197 { | |
|
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1198 overlay float EAD, END; |
| 0 | 1199 |
|
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1200 ppN2 = N2_ratio * (pres_diluent - ppWater); |
| 0 | 1201 ppHe = He_ratio * (pres_diluent - ppWater); |
| 1202 | |
| 1203 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
| 1204 // with plain air. | |
| 1205 // ppN2 = 79% * (P_EAD - ppWater) | |
| 1206 // EAD = (P_EAD - Psurface) * 10 | |
| 1207 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 | |
| 1208 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; | |
| 1209 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; | |
| 1210 char_O_EAD = (unsigned char)(EAD + 0.5); | |
| 1211 | |
| 1212 // END : Equivalent Narcotic Dive. | |
| 1213 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
| 1214 // 0.23 btw). Hence the formula becomes: | |
| 1215 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater | |
| 1216 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER | |
| 1217 // | |
| 1218 // Source cited: | |
| 1219 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
| 1220 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
| 1221 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; | |
| 1222 if( END < 0.0 || END > 245.5 ) END = 0.0; | |
| 1223 char_O_END = (unsigned char)(END + 0.5); | |
| 1224 } | |
| 1225 else // new in v.101 | |
| 1226 { | |
| 1227 ppN2 = 0.0; | |
| 1228 ppHe = 0.0; | |
| 1229 char_O_EAD = char_O_END = 0; | |
| 1230 } | |
| 1231 | |
| 1232 if(!char_I_step_is_1min) | |
| 1233 calc_tissue(0); | |
| 1234 else | |
| 1235 calc_tissue(1); | |
| 1236 | |
| 1237 // Calc limit for surface, ie. GF_high. | |
| 1238 calc_limit(); | |
| 1239 | |
| 126 | 1240 // Fill int_O_ceiling if ceiling is below the surface |
| 1241 if ((calc_lead_tissue_limit-pres_surface)>0) | |
| 1242 int_O_ceiling = (short)((calc_lead_tissue_limit-pres_surface)*1000); | |
| 1243 else | |
| 1244 int_O_ceiling = 0; | |
| 1245 | |
| 0 | 1246 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
| 1247 } | |
| 1248 | |
| 1249 | |
| 1250 ////////////////////////////////////////////////////////////////////////////// | |
| 1251 // Compute stops. | |
| 1252 // | |
| 1253 // Note: because this can be very long, break on 16 iterations, and set state | |
| 1254 // to 0 when finished, or to 1 when needing to continue. | |
| 1255 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), | |
| 1256 // break the loop when total time > 512msec. | |
| 1257 // | |
| 1258 void calc_hauptroutine_calc_deco(void) | |
| 1259 { | |
| 1260 overlay unsigned char loop; | |
| 1261 | |
| 34 | 1262 for(loop = 0; loop < 16; ++loop) |
| 0 | 1263 { |
| 1264 // Limit loops to 512ms, using timer 5: | |
|
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1265 if( tmr5() & (512*32) ) |
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1266 break; |
| 34 | 1267 |
| 0 | 1268 if( calc_nextdecodepth() ) |
| 1269 { | |
| 1270 if( temp_depth_limit == 0 ) | |
| 1271 goto Surface; | |
| 1272 | |
| 1273 //---- We hit a stop at temp_depth_limit --------------------- | |
| 1274 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, | |
|
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1275 + pres_surface; // To absolute. |
| 0 | 1276 if( !update_deco_table() ) // Adds a one minute stops. |
| 1277 goto Surface; // Deco table full: abort... | |
| 1278 } | |
| 1279 else | |
| 1280 { | |
| 1281 //---- No stop ----------------------------------------------- | |
| 1282 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. | |
| 1283 | |
| 1284 //---- Finish computations once surface is reached ----------- | |
| 1285 if( temp_deco <= pres_surface ) | |
| 1286 { | |
| 1287 Surface: | |
| 1288 if( char_O_deco_status == 1 ) // Don't in @+5min variant. | |
| 1289 copy_deco_table(); | |
| 1290 | |
| 1291 calc_ascenttime(); | |
| 1292 char_O_deco_status = 0; // calc nullzeit next time. | |
| 1293 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
|
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1294 return; |
| 0 | 1295 } |
| 1296 } | |
| 1297 //---- Then update tissue -------------------------------------------- | |
| 1298 sim_dive_mins++; // Advance simulated time by 1 minute. | |
| 1299 gas_switch_set(); // Apply any simulated gas change, once validated. | |
| 1300 sim_alveolar_presures(); // Updates ppN2 and ppHe. | |
| 1301 sim_tissue(1); // Simulate compartiments for 1 minute. | |
| 1302 } | |
| 1303 | |
| 1304 // Surface not reached, need more stops... for menu animation. | |
| 1305 char_O_deco_last_stop = temp_depth_limit; // Reached depth. | |
| 1306 } | |
| 1307 | |
| 1308 | |
| 1309 ////////////////////////////////////////////////////////////////////////////// | |
| 1310 // Simulation ascention to first deco stop. | |
| 1311 // | |
| 1312 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), | |
| 1313 // there is no need to break on more that 16 iterations | |
| 1314 // (or we are already in deep shit). | |
| 1315 // | |
| 1316 // Input: pres_respiration | |
| 1317 // Output: temp_deco | |
| 1318 // | |
| 1319 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, | |
| 1320 // before ascent. | |
| 1321 void sim_ascent_to_first_stop(void) | |
| 1322 { | |
| 1323 overlay unsigned char fast = 1; // 1min or 2sec steps. | |
| 1324 | |
| 1325 update_startvalues(); | |
| 1326 clear_deco_table(); | |
| 1327 | |
| 1328 temp_deco = pres_respiration; // Starts from current real depth. | |
| 1329 | |
| 1330 // Are we doing the special @+5min variation ? | |
| 1331 if(char_O_deco_status & 4) | |
| 1332 sim_extra_time(); | |
| 1333 | |
| 1334 //---- Loop until first stop, gas switch, or surface is reached ---------- | |
| 1335 for(;;) | |
| 1336 { | |
| 1337 overlay float old_deco = temp_deco; // Pamb backup (bars) | |
| 1338 | |
| 1339 // Try ascending 1 full minute (fast) or 2sec (!fast): | |
| 1340 if( fast ) | |
| 1341 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. | |
| 1342 else | |
| 1343 temp_deco -= (10.0/30.0)*METER_TO_BAR; // 2sec at 10m/min. | |
| 1344 | |
| 1345 if( temp_deco < pres_surface ) // But don't go over surface. | |
| 1346 temp_deco = pres_surface; | |
| 1347 | |
| 1348 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because | |
| 1349 // one minute passed. | |
| 1350 sim_limit(GF_low); | |
| 1351 | |
| 1352 // Did we reach deepest remaining stop ? | |
| 1353 if( temp_deco < sim_lead_tissue_limit ) | |
| 1354 { | |
| 1355 temp_deco = old_deco; // Restore last correct depth, | |
| 1356 | |
| 1357 if( fast ) | |
| 1358 { | |
| 1359 fast = 0; // Retry with 2sec steps. | |
| 1360 continue; | |
| 1361 } | |
| 1362 else | |
| 1363 break; // Done... | |
| 1364 } | |
| 1365 | |
| 1366 // Did we reach surface ? | |
| 1367 // NOTE: we should round BEFORE checking surface is reached. | |
| 1368 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); | |
| 1369 if( temp_depth_limit == 0 ) | |
| 1370 { | |
| 1371 temp_deco = pres_surface; // Yes: finished ! | |
| 1372 break; | |
| 1373 } | |
| 1374 | |
| 1375 // Check for gas change below new depth ? | |
| 1376 if( gas_switch_deepest() ) | |
| 1377 { | |
| 1378 assert( temp_depth_limit > 0); | |
| 1379 | |
| 1380 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; | |
| 1381 break; | |
| 1382 } | |
| 1383 | |
| 1384 if( fast ) | |
| 1385 sim_dive_mins++; // Advance simulated time by 1 minute. | |
| 1386 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe | |
| 1387 sim_tissue(fast); // and update tissues for 1 min. | |
| 1388 } | |
| 1389 } | |
| 1390 | |
| 1391 ////////////////////////////////////////////////////////////////////////////// | |
| 1392 // Simulation extra time at the current depth. | |
| 1393 // | |
| 1394 // This routine is used for @+5min feature. | |
| 1395 void sim_extra_time(void) | |
| 1396 { | |
| 1397 overlay unsigned char extra = char_I_extra_time; | |
| 1398 do { | |
| 1399 sim_dive_mins++; // Advance simulated time by 1 minute. | |
| 1400 sim_tissue(1); // and update tissues for 1 min. | |
| 1401 } while( --extra != 0 ); | |
| 1402 } | |
| 1403 | |
| 1404 ////////////////////////////////////////////////////////////////////////////// | |
| 1405 // calc_tissue | |
| 1406 // | |
| 1407 // optimized in v.101 | |
| 1408 // | |
| 1409 static void calc_tissue(PARAMETER unsigned char period) | |
| 1410 { | |
| 1411 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m | |
| 1412 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 1413 | |
| 1414 for (ci=0;ci<NUM_COMP;ci++) | |
| 1415 { | |
| 1416 read_buhlmann_times(period); // 2 sec or 1 min period. | |
| 1417 | |
| 1418 // N2 | |
| 1419 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; | |
| 1420 temp_tissue_safety(); | |
| 1421 pres_tissue_N2[ci] += temp_tissue; | |
| 1422 | |
| 1423 // He | |
| 1424 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; | |
| 1425 temp_tissue_safety(); | |
| 1426 pres_tissue_He[ci] += temp_tissue; | |
| 1427 } | |
| 1428 } | |
| 1429 | |
| 1430 ////////////////////////////////////////////////////////////////////////////// | |
| 1431 // calc_limit | |
| 1432 // | |
| 1433 // New in v.111 : separated from calc_tissue(), and depends on GF value. | |
| 1434 // | |
| 1435 static void calc_limit(void) | |
| 1436 { | |
| 1437 char_O_gtissue_no = 255; | |
| 1438 calc_lead_tissue_limit = 0.0; | |
| 1439 | |
| 1440 for(ci=0; ci<NUM_COMP;ci++) | |
| 1441 { | |
| 1442 overlay float N2 = pres_tissue_N2[ci]; | |
| 1443 overlay float He = pres_tissue_He[ci]; | |
| 1444 overlay float p = N2 + He; | |
| 1445 | |
| 1446 read_buhlmann_coefficients(); | |
| 1447 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; | |
| 1448 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 1449 | |
| 1450 // Apply the Eric Baker's varying gradient factor correction. | |
| 1451 // Note: the correction factor depends both on GF and b, | |
| 1452 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1453 // so that can change who is the leading gas... | |
| 1454 // Note: Also depends of the GF. So the calcul is different for | |
| 1455 // GF_low, current GF, or GF_high... | |
| 1456 // *BUT* calc_tissue() is used to compute bottom time, | |
| 1457 // hence what would happend at surface, | |
| 1458 // hence at GF_high. | |
| 1459 if( char_I_deco_model != 0 ) | |
| 1460 p = ( p - var_N2_a * GF_high) * var_N2_b | |
| 1461 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
| 1462 else | |
| 1463 p = (p - var_N2_a) * var_N2_b; | |
| 1464 if( p < 0.0 ) p = 0.0; | |
| 1465 | |
| 1466 if( p > calc_lead_tissue_limit ) | |
| 1467 { | |
| 1468 char_O_gtissue_no = ci; | |
| 1469 calc_lead_tissue_limit = p; | |
| 1470 } | |
| 1471 } | |
| 1472 | |
| 1473 assert( char_O_gtissue_no < NUM_COMP ); | |
| 1474 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); | |
| 1475 } | |
| 1476 | |
| 1477 ////////////////////////////////////////////////////////////////////////////// | |
| 1478 // calc_nullzeit | |
| 1479 // | |
| 1480 // calculates the remaining bottom time | |
| 1481 // | |
| 1482 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second | |
| 1483 // exponential term to the M-value equation, making it impossible to | |
| 1484 // invert... So we have to make a fast-simu until we find a better way. | |
| 1485 // | |
| 1486 // Input: pres_respiration | |
| 1487 // Output: char_O_nullzeit | |
| 1488 // | |
| 1489 static void calc_nullzeit(void) | |
| 1490 { | |
| 1491 //---- Compute ppN2 and ppHe --------------------------------------------- | |
| 1492 temp_deco = pres_respiration; | |
| 1493 sim_alveolar_presures(); | |
| 1494 | |
| 1495 char_O_nullzeit = 240; | |
| 1496 for(ci=0; ci<NUM_COMP; ci++) | |
| 1497 { | |
| 1498 //---- Read A/B values and loading factor for N2 and He -------------- | |
| 1499 overlay float tN2 = pres_tissue_N2[ci]; | |
| 1500 overlay float tHe = pres_tissue_He[ci]; | |
| 1501 overlay float t = tN2 + tHe; | |
| 1502 overlay unsigned char ndl; | |
| 1503 overlay unsigned char period = 10; | |
| 1504 | |
| 1505 read_buhlmann_coefficients(); | |
| 1506 read_buhlmann_times(2); // Starts with a 10min period. | |
| 1507 | |
| 1508 //---- Simulate for that tissue -------------------------------------- | |
| 1509 // NOTE: No need to simulate for longuer than the already found NDL. | |
| 1510 for(ndl=0; ndl<char_O_nullzeit;) | |
| 1511 { | |
| 1512 //---- Compute updated mix M-value at surface | |
| 1513 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; | |
| 1514 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; | |
| 1515 overlay float M0 = (a + pres_surface/b); | |
| 1516 | |
| 1517 //---- Add 10min/1min to N2/He tissues | |
| 1518 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; | |
| 1519 overlay float dTHe = (ppHe - tHe) * var_He_e; | |
| 1520 | |
|
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1521 //---- Apply security margin for both models |
|
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1522 // NDL can be computed while ascending... SO we have |
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1523 // to check wether we are saturating or desaturating. |
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1524 if( dTN2 > 0.0 ) dTN2 *= float_saturation_multiplier; |
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1525 else dTN2 *= float_desaturation_multiplier; |
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1526 |
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1527 if( dTHe > 0.0 ) dTHe *= float_saturation_multiplier; |
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1528 else dTHe *= float_saturation_multiplier; |
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1529 |
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|
1530 if (char_I_deco_model != 0 ) |
| 0 | 1531 M0 = GF_high * (M0 - pres_surface) + pres_surface; |
| 1532 | |
| 1533 //---- Simulate off-gasing while going to surface | |
| 1534 // TODO ! | |
| 1535 // dTN2 -= exp( ... ascent time ... ppN2...) | |
| 1536 // dTHe -= exp( ... ascent time ... ppHe...) | |
| 1537 | |
| 1538 //---- Ok now, and still ok to surface after 1 or 10 minutes ? | |
| 1539 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) | |
| 1540 { | |
| 1541 tN2 += dTN2; // YES: apply gas loadings, | |
| 1542 tHe += dTHe; | |
| 1543 t = tN2 + tHe; | |
| 1544 ndl += period; // increment NDL, | |
| 1545 continue; // and loop. | |
| 1546 } | |
| 1547 | |
| 1548 //---- Should we retry with smaller steps ? | |
| 1549 if( period == 10 ) | |
| 1550 { | |
| 1551 read_buhlmann_times(1); // 1min coefs. | |
| 1552 period = 1; | |
| 1553 continue; | |
| 1554 } | |
| 1555 | |
| 1556 //---- ELSE make a linear approx for the last minute | |
| 1557 // Usefull to have a meaningfull rounding of NDL. | |
| 1558 // But ONLY it positive (negativ casted to unsigned is bad). | |
| 1559 if( M0 > t ) | |
| 1560 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
| 1561 break; | |
| 1562 } | |
| 1563 | |
| 1564 // Keep the shortest NDL found | |
| 1565 if( ndl < char_O_nullzeit ) | |
| 1566 char_O_nullzeit = ndl; | |
| 1567 } | |
| 1568 } | |
| 1569 | |
| 1570 ////////////////////////////////////////////////////////////////////////////// | |
| 1571 // calc_ascenttime | |
| 1572 // | |
| 1573 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, | |
| 1574 // and all stops. | |
| 1575 // | |
| 1576 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. | |
| 1577 static void calc_ascenttime(void) | |
| 1578 { | |
| 1579 overlay unsigned char x; | |
| 1580 overlay unsigned short sum; | |
| 1581 | |
| 1582 // + 0.7 to count 1 minute ascent time from 3 metre to surface | |
| 1583 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
| 1584 if (ascent < 0.0) | |
| 1585 ascent = 0.0; | |
| 1586 sum = (unsigned short)(ascent + 0.99); | |
| 1587 | |
| 1588 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) | |
| 1589 sum += (unsigned short)internal_deco_time[x]; | |
| 1590 | |
| 1591 if( char_O_deco_status == 1 ) | |
| 1592 int_O_ascenttime = sum; | |
| 1593 else | |
| 1594 int_O_extra_ascenttime = sum; | |
| 1595 | |
| 1596 } | |
| 1597 | |
| 1598 ////////////////////////////////////////////////////////////////////////////// | |
| 1599 // update_startvalues | |
| 1600 // | |
| 1601 // updated in v.102 | |
| 1602 // | |
| 1603 void update_startvalues(void) | |
| 1604 { | |
| 1605 overlay unsigned char x; | |
| 1606 | |
| 1607 // Start ascent simulation with current tissue partial pressures. | |
| 1608 for(x=0; x<NUM_COMP; x++) | |
| 1609 { | |
| 1610 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; | |
| 1611 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
| 1612 } | |
| 1613 | |
| 1614 // No leading tissue (yet) for this ascent simulation. | |
| 1615 sim_lead_tissue_limit = 0.0; | |
| 1616 sim_lead_tissue_no = 255; | |
| 1617 } | |
| 1618 | |
| 1619 ////////////////////////////////////////////////////////////////////////////// | |
| 1620 // sim_tissue | |
| 1621 // | |
| 1622 // optimized in v.101 | |
| 1623 // | |
| 1624 // Function very simular to calc_tissue, but: | |
| 1625 // + Use a 1min or 10min period. | |
| 1626 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
| 1627 static void sim_tissue(PARAMETER unsigned char period) | |
| 1628 { | |
| 1629 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m | |
| 1630 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
| 1631 | |
| 1632 for(ci=0; ci<NUM_COMP; ci++) | |
| 1633 { | |
| 1634 read_buhlmann_times(period); // 1 or 10 minute(s) interval | |
| 1635 | |
| 1636 // N2 | |
| 1637 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; | |
| 1638 temp_tissue_safety(); | |
| 1639 sim_pres_tissue_N2[ci] += temp_tissue; | |
| 1640 | |
| 1641 // He | |
| 1642 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; | |
| 1643 temp_tissue_safety(); | |
| 1644 sim_pres_tissue_He[ci] += temp_tissue; | |
| 1645 } | |
| 1646 } | |
| 1647 | |
| 1648 ////////////////////////////////////////////////////////////////////////////// | |
| 1649 // sim_limit() | |
| 1650 // | |
| 1651 // New in v.111 | |
| 1652 // | |
| 1653 // Function separated from sim_tissue() to allow recomputing limit on | |
| 1654 // different depth, because it depends on current gradient factor. | |
| 1655 // | |
| 1656 static void sim_limit(PARAMETER float GF_current) | |
| 1657 { | |
| 1658 assert( 0.0 < GF_current && GF_current <= 1.0f); | |
| 1659 | |
| 1660 sim_lead_tissue_limit = 0.0; | |
| 1661 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. | |
| 1662 | |
| 1663 for(ci=0; ci<NUM_COMP; ci++) | |
| 1664 { | |
| 1665 overlay float N2 = sim_pres_tissue_N2[ci]; | |
| 1666 overlay float He = sim_pres_tissue_He[ci]; | |
| 1667 overlay float p = N2 + He; | |
| 1668 | |
| 1669 read_buhlmann_coefficients(); | |
| 1670 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; | |
| 1671 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
| 1672 | |
| 1673 // Apply the Eric Baker's varying gradient factor correction. | |
| 1674 // Note: the correction factor depends both on GF and b, | |
| 1675 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
| 1676 // so that can change who is the leading gas... | |
| 1677 // Note: Also depends of the GF_current... | |
| 1678 if( char_I_deco_model != 0 ) | |
| 1679 p = ( p - var_N2_a * GF_current) | |
| 1680 / (GF_current / var_N2_b + 1.0 - GF_current); | |
| 1681 else | |
| 1682 p = (p - var_N2_a) * var_N2_b; | |
| 1683 | |
| 1684 if( p > sim_lead_tissue_limit ) | |
| 1685 { | |
| 1686 sim_lead_tissue_no = ci; | |
| 1687 sim_lead_tissue_limit = p; | |
| 1688 } | |
| 1689 } // for ci | |
| 1690 | |
| 1691 assert( sim_lead_tissue_no < NUM_COMP ); | |
| 1692 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); | |
| 1693 } | |
| 1694 | |
| 1695 ////////////////////////////////////////////////////////////////////////////// | |
| 1696 // clear_deco_table | |
| 1697 // | |
| 1698 // unchanged in v.101 | |
| 1699 // | |
| 1700 static void clear_deco_table(void) | |
| 1701 { | |
| 1702 overlay unsigned char x; | |
| 1703 | |
| 1704 for(x=0; x<NUM_STOPS; ++x) | |
| 1705 { | |
| 1706 internal_deco_time [x] = 0; | |
| 1707 internal_deco_depth[x] = 0; | |
| 1708 } | |
| 1709 } | |
| 1710 | |
| 1711 ////////////////////////////////////////////////////////////////////////////// | |
| 1712 // update_deco_table | |
| 1713 // | |
| 1714 // Add 1 min to current stop. | |
| 1715 // | |
| 1716 // Inputs: | |
| 1717 // temp_depth_limit = stop's depth, in meters. | |
| 1718 // In/Out: | |
| 1719 // internal_deco_depth[] : depth (in metres) of each stops. | |
| 1720 // internal_deco_time [] : time (in minutes) of each stops. | |
| 1721 // | |
| 1722 static unsigned char update_deco_table() | |
| 1723 { | |
| 1724 overlay unsigned char x; | |
| 1725 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). | |
| 1726 assert( temp_depth_limit > 0 ); // No stop at surface... | |
| 1727 | |
| 1728 for(x=0; x<NUM_STOPS; ++x) | |
| 1729 { | |
| 1730 // Make sure deco-stops are recorded in order: | |
| 111 | 1731 assert( !internal_deco_depth[x] || temp_depth_limit <= internal_deco_depth[x] ); |
| 0 | 1732 |
| 111 | 1733 if( internal_deco_depth[x]== temp_depth_limit ) |
| 0 | 1734 { |
| 1735 // Do not overflow (max 255') | |
| 1736 if( internal_deco_time[x] < 255 ) | |
| 1737 { | |
| 1738 internal_deco_time[x]++; | |
| 1739 return 1; | |
| 1740 } | |
| 1741 // But store extra in the next stop... | |
| 1742 } | |
| 1743 | |
| 1744 if( internal_deco_depth[x] == 0 ) | |
| 1745 { | |
| 1746 internal_deco_depth[x] = temp_depth_limit; | |
| 1747 | |
| 1748 internal_deco_time[x] = 1; | |
| 111 | 1749 internal_deco_gas[x] = sim_gas_last_used; |
| 0 | 1750 return 1; |
| 1751 } | |
| 1752 } | |
| 1753 | |
| 1754 // Can't store stops at more than 96m. | |
| 1755 // Or stops at less that 3m too. | |
| 1756 // Just do nothing with that... | |
| 1757 return 0; | |
| 1758 } | |
| 1759 | |
| 1760 ////////////////////////////////////////////////////////////////////////////// | |
| 1761 // calc_gradient_factor | |
| 1762 // | |
| 1763 // optimized in v.101 (var_N2_a) | |
| 1764 // new code in v.102 | |
| 1765 // | |
| 1766 static void calc_gradient_factor(void) | |
| 1767 { | |
| 1768 overlay float gf; | |
| 1769 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; | |
| 1770 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
| 1771 | |
| 1772 assert( char_O_gtissue_no < NUM_COMP ); | |
| 1773 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); | |
| 1774 | |
| 1775 // tissue > respiration (currently off-gasing) | |
| 1776 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. | |
| 1777 // GF = 100% when respiration == limit. | |
| 1778 temp_tissue = N2 + He; | |
| 1779 if( temp_tissue <= pres_respiration ) | |
| 1780 gf = 0.0; | |
| 1781 else | |
| 1782 { | |
| 1783 overlay float limit = calc_lead_tissue_limit; | |
| 1784 // NOTE: in GF model, calc_lead_tissue_limit include already the | |
| 1785 // correction due to gradient factor. To compute the actual | |
| 1786 // current GF, we need to (re-)compute the raw ambiant-pressure | |
| 313 | 1787 // limit from the Buhlmann model. |
| 0 | 1788 if( char_I_deco_model != 0 ) |
| 1789 { | |
| 1790 ci = char_O_gtissue_no; | |
| 1791 read_buhlmann_coefficients(); | |
| 1792 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; | |
| 1793 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; | |
| 1794 limit = (temp_tissue - var_N2_a) * var_N2_b; | |
| 1795 } | |
| 1796 | |
| 1797 gf = (temp_tissue - pres_respiration) | |
| 1798 / (temp_tissue - limit) | |
| 1799 * 100.0; | |
| 1800 if( gf > 254.5 ) gf = 255.0; | |
| 1801 if( gf < 0.0 ) gf = 0.0; | |
| 1802 } | |
| 1803 char_O_gradient_factor = (unsigned char)(gf+0.5f); | |
| 1804 | |
| 1805 } | |
| 1806 | |
| 1807 ////////////////////////////////////////////////////////////////////////////// | |
| 1808 // deco_calc_desaturation_time | |
| 1809 // | |
| 1810 // FIXED N2_ratio | |
| 1811 // unchanged in v.101 | |
| 1812 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier | |
| 1813 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] | |
| 1814 // | |
| 1815 void deco_calc_desaturation_time(void) | |
| 1816 { | |
| 1817 RESET_C_STACK | |
| 1818 | |
| 1819 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); | |
| 1820 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1821 | |
| 313 | 1822 N2_ratio = 0.7902; // FIXED sum as stated in buhlmann |
| 0 | 1823 pres_surface = int_I_pres_surface * 0.001; |
| 1824 ppN2 = N2_ratio * (pres_surface - ppWater); | |
| 1825 int_O_desaturation_time = 0; | |
| 1826 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); | |
| 1827 | |
| 1828 for(ci=0; ci<NUM_COMP; ci++) | |
| 1829 { | |
| 1830 overlay unsigned short desat_time; // For a particular compartiment, in min. | |
| 1831 overlay float temp1; | |
| 1832 overlay float temp2; | |
| 1833 overlay float temp3; | |
| 1834 overlay float temp4; | |
| 1835 | |
| 1836 read_buhlmann_ht(); | |
| 1837 | |
| 1838 // saturation_time (for flight) and N2_saturation in multiples of halftime | |
| 1839 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1840 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
| 1841 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations | |
| 1842 // N2 | |
| 1843 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; | |
| 1844 temp2 = ppN2 - pres_tissue_N2[ci]; | |
| 1845 if (temp2 >= 0.0) | |
| 1846 temp1 = 0.0; | |
| 1847 else | |
| 1848 temp1 = temp1 / temp2; | |
| 1849 | |
| 1850 if( 0.0 < temp1 && temp1 < 1.0 ) | |
| 1851 { | |
| 1852 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1853 // minus because log is negative. | |
| 1854 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. | |
| 1855 temp2 = var_N2_ht * temp1 / float_desaturation_multiplier; // time necessary (in minutes ) for complete desaturation (see comment about 5 percent) | |
| 1856 } | |
| 1857 else | |
| 1858 { | |
| 1859 temp1 = 0.0; | |
| 1860 temp2 = 0.0; | |
| 1861 } | |
| 1862 | |
| 1863 // He | |
| 1864 temp3 = 0.1 - pres_tissue_He[ci]; | |
| 1865 if (temp3 >= 0.0) | |
| 1866 temp3 = 0.0; | |
| 1867 else | |
| 1868 temp3 = - temp3 / pres_tissue_He[ci]; | |
| 1869 | |
| 1870 if( 0.0 < temp3 && temp3 < 1.0 ) | |
|
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1871 { |
| 0 | 1872 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
| 1873 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. | |
| 1874 // minus because log is negative | |
| 1875 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier | |
|
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1876 } |
| 0 | 1877 else |
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1878 { |
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1879 temp3 = 0.0; |
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1880 temp4 = 0.0; |
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1881 } |
| 0 | 1882 |
| 1883 // saturation_time (for flight) | |
| 1884 if (temp4 > temp2) | |
| 1885 desat_time = (unsigned short)temp4; | |
| 1886 else | |
| 1887 desat_time = (unsigned short)temp2; | |
| 1888 | |
| 1889 if(desat_time > int_O_desaturation_time) | |
| 1890 int_O_desaturation_time = desat_time; | |
| 1891 | |
| 1892 // N2 saturation in multiples of halftime for display purposes | |
| 1893 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1894 temp2 = temp2 + 80.0; // set center | |
| 1895 if (temp2 < 0.0) | |
| 1896 temp2 = 0.0; | |
| 1897 if (temp2 > 255.0) | |
| 1898 temp2 = 255.0; | |
| 1899 char_O_tissue_N2_saturation[ci] = (char)temp2; | |
| 1900 | |
| 1901 // He saturation in multiples of halftime for display purposes | |
| 1902 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 | |
| 1903 temp4 = temp4 + 80.0; // set center | |
| 1904 if (temp4 < 0.0) | |
| 1905 temp4 = 0.0; | |
| 1906 if (temp4 > 255.0) | |
| 1907 temp4 = 255.0; | |
| 1908 char_O_tissue_He_saturation[ci] = (char)temp4; | |
| 1909 } // for | |
| 1910 } | |
| 1911 | |
| 1912 ////////////////////////////////////////////////////////////////////////////// | |
| 1913 // calc_wo_deco_step_1_min | |
| 1914 // | |
| 1915 // FIXED N2 Ratio | |
| 1916 // optimized in v.101 (...saturation_multiplier) | |
| 1917 // desaturation slowed down to 70,42% | |
| 1918 // | |
| 1919 static void calc_wo_deco_step_1_min(void) | |
| 1920 { | |
| 1921 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); | |
| 1922 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
| 1923 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
| 1924 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
| 1925 | |
| 1926 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
| 1927 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
| 1928 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 1929 ppHe = 0.0; | |
| 1930 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); | |
| 1931 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1932 | |
| 1933 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure | |
| 1934 | |
| 1935 clear_deco_table(); | |
| 1936 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. | |
| 1937 char_O_nullzeit = 0; | |
| 1938 int_O_ascenttime = 0; | |
| 1939 int_O_extra_ascenttime = 0; | |
| 1940 calc_gradient_factor(); | |
| 1941 } | |
| 1942 | |
| 1943 ////////////////////////////////////////////////////////////////////////////// | |
| 1944 // calc_dive_interval | |
| 1945 // | |
| 1946 // Prepare tissue for delay before the next dive simulation. | |
| 1947 // | |
| 1948 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
| 1949 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
| 1950 // | |
| 1951 // Should be protected by deco_push_tissues_to_vault(), | |
| 1952 // deco_pull_tissues_from_vault() | |
| 1953 // | |
| 1954 // desaturation slowed down to 70,42%. | |
| 1955 // | |
| 1956 static void calc_dive_interval(void) | |
| 1957 { | |
| 1958 overlay unsigned char t; | |
|
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1959 |
| 0 | 1960 //---- Initialize simulation parameters ---------------------------------- |
| 1961 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
| 1962 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
| 1963 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
| 1964 ppHe = 0.0; | |
| 1965 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); | |
| 1966 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
| 1967 | |
| 1968 //---- Perform simulation ------------------------------------------------ | |
| 1969 for(t=0; t<char_I_dive_interval; ++t) | |
| 1970 { | |
| 1971 calc_tissue(2); // period = 10min. | |
| 1972 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
| 1973 } | |
| 322 | 1974 assert( 0.0 <= CNS_fraction && CNS_fraction <= 9.99 ); // 999 % |
| 1975 int_O_CNS_fraction = (unsigned short)(CNS_fraction * 100.0 + 0.5); | |
| 0 | 1976 |
| 1977 } | |
| 1978 | |
| 1979 ////////////////////////////////////////////////////////////////////////////// | |
| 1980 // deco_clear_CNS_fraction | |
| 1981 // | |
| 1982 // new in v.101 | |
| 1983 // | |
| 1984 void deco_clear_CNS_fraction(void) | |
| 1985 { | |
| 1986 RESET_C_STACK | |
| 1987 | |
| 1988 CNS_fraction = 0.0; | |
| 1989 int_O_CNS_fraction = 0; | |
| 1990 } | |
| 1991 | |
| 1992 ////////////////////////////////////////////////////////////////////////////// | |
| 1993 // deco_calc_CNS_fraction | |
| 1994 // | |
| 1995 // Input: char_I_actual_ppO2 : Current condition (in decibars). | |
| 1996 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. | |
| 1997 // CNS_fraction : velue before period. | |
| 1998 // Output: CNS_fraction, int_O_CNS_fraction | |
| 1999 // | |
| 2000 void deco_calc_CNS_fraction(void) | |
| 2001 { | |
| 2002 overlay float time_factor = 1.0f; | |
| 2003 RESET_C_STACK | |
| 2004 | |
| 322 | 2005 assert( 0.0 <= CNS_fraction && CNS_fraction <= 9.99 ); |
| 0 | 2006 assert( char_I_actual_ppO2 > 15 ); |
| 2007 | |
| 2008 if( char_I_step_is_1min == 1 ) | |
| 2009 time_factor = 30.0f; | |
| 2010 else if( char_I_step_is_1min == 2 ) | |
| 2011 time_factor = 300.0f; | |
|
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2012 //------------------------------------------------------------------------ |
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2013 // Don't increase CNS below 0.5 bar, but keep it steady. |
| 0 | 2014 if (char_I_actual_ppO2 < 50) |
| 2015 ; // no changes | |
|
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2016 //------------------------------------------------------------------------ |
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2017 // Below (and including) 1.60 bar |
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2018 else if (char_I_actual_ppO2 < 61) |
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2019 CNS_fraction += time_factor/(-533.07 * char_I_actual_ppO2 + 54000.0); |
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2020 else if (char_I_actual_ppO2 < 71) |
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2021 CNS_fraction += time_factor/(-444.22 * char_I_actual_ppO2 + 48600.0); |
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2022 else if (char_I_actual_ppO2 < 81) |
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2023 CNS_fraction += time_factor/(-355.38 * char_I_actual_ppO2 + 42300.0); |
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2024 else if (char_I_actual_ppO2 < 91) |
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2025 CNS_fraction += time_factor/(-266.53 * char_I_actual_ppO2 + 35100.0); |
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2026 else if (char_I_actual_ppO2 < 111) |
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2027 CNS_fraction += time_factor/(-177.69 * char_I_actual_ppO2 + 27000.0); |
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2028 else if (char_I_actual_ppO2 < 152) |
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2029 CNS_fraction += time_factor/( -88.84 * char_I_actual_ppO2 + 17100.0); |
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2030 else if (char_I_actual_ppO2 < 167) |
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2031 CNS_fraction += time_factor/(-222.11 * char_I_actual_ppO2 + 37350.0); |
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2032 //------------------------------------------------------------------------ |
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2033 // Arieli et all.(2002): Modeling pulmonary and CNS O2 toxicity: |
| 322 | 2034 // J Appl Physiol 92: 248--256, 2002, doi:10.1152/japplphysiol.00434.2001 |
|
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2035 // Formula (A1) based on value for 1.55 and c=20 |
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2036 // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
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2037 else if (char_I_actual_ppO2 < 172) |
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2038 CNS_fraction += time_factor*0.00102; |
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2039 else if (char_I_actual_ppO2 < 177) |
| 0 | 2040 CNS_fraction += time_factor*0.00136; |
|
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2041 else if (char_I_actual_ppO2 < 182) |
| 0 | 2042 CNS_fraction += time_factor*0.00180; |
|
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2043 else if (char_I_actual_ppO2 < 187) |
| 0 | 2044 CNS_fraction += time_factor*0.00237; |
|
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2045 else if (char_I_actual_ppO2 < 192) |
| 0 | 2046 CNS_fraction += time_factor*0.00310; |
|
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2047 else if (char_I_actual_ppO2 < 198) |
| 0 | 2048 CNS_fraction += time_factor*0.00401; |
|
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2049 else if (char_I_actual_ppO2 < 203) |
| 0 | 2050 CNS_fraction += time_factor*0.00517; |
|
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2051 else if (char_I_actual_ppO2 < 233) |
| 0 | 2052 CNS_fraction += time_factor*0.0209; |
| 2053 else | |
| 2054 CNS_fraction += time_factor*0.0482; // value for 2.5 | |
| 2055 | |
| 322 | 2056 if( CNS_fraction > 9.99) // Limit display to 999% |
| 0 | 2057 CNS_fraction = 9.99; |
| 2058 if( CNS_fraction < 0.0 ) | |
| 2059 CNS_fraction = 0.0; | |
| 2060 | |
| 322 | 2061 int_O_CNS_fraction = (unsigned short)(100.0 * CNS_fraction + 0.5); |
| 0 | 2062 } |
| 2063 | |
| 2064 ////////////////////////////////////////////////////////////////////////////// | |
| 2065 // deco_calc_CNS_planning | |
| 2066 // | |
| 2067 // Compute CNS during predicted ascent. | |
| 2068 // | |
| 2069 // Note: Needs a call to deco_push_tissues_to_vault(), | |
| 2070 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
| 2071 // | |
| 2072 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
| 2073 // Output: CNS_fraction, int_O_CNS_fraction | |
| 2074 // | |
| 2075 void deco_calc_CNS_planning(void) | |
| 2076 { | |
| 2077 overlay unsigned char backup_gas_last_depth; | |
| 2078 overlay unsigned char backup_gas_last_used; | |
| 2079 overlay unsigned short backup_dive_mins; | |
| 2080 overlay unsigned char backup_actual_ppO2; | |
| 2081 | |
| 2082 RESET_C_STACK | |
| 2083 | |
| 2084 // Backup state machine | |
| 2085 backup_gas_last_depth = sim_gas_last_depth; | |
| 2086 backup_gas_last_used = sim_gas_last_used; | |
| 2087 backup_dive_mins = sim_dive_mins; | |
| 2088 backup_actual_ppO2 = char_I_actual_ppO2; | |
| 2089 | |
| 2090 // Uses 1min CNS period: | |
| 2091 char_I_step_is_1min = 1; | |
| 2092 | |
| 2093 //---- Retrieve bottom Gas used, and set variables. | |
| 2094 sim_gas_last_used = char_I_first_gas; | |
| 2095 sim_gas_last_depth = 0; // Surface gas marker. | |
| 2096 gas_switch_set(); // Sets initial calc_N2/He_ratio | |
| 2097 | |
| 2098 //---- CCR mode : do the full TTS at once -------------------------------- | |
| 2099 if( char_I_const_ppO2 != 0 ) | |
| 2100 { | |
| 2101 overlay unsigned short t; // Needs 16bits here ! | |
| 2102 char_I_actual_ppO2 = char_I_const_ppO2; | |
| 2103 for(t=0; t<int_O_ascenttime; ++t) | |
| 2104 deco_calc_CNS_fraction(); | |
| 2105 } | |
| 2106 else //---- OC mode : have to follow all gas switches... ----------------- | |
| 2107 { | |
| 2108 overlay unsigned char i = 0; // Decostop loop counter | |
| 2109 overlay float actual_ppO2; | |
| 2110 overlay unsigned char time, t; | |
| 2111 | |
| 2112 //---- Ascent to surface delay | |
| 2113 // NOTE: count as if time is spent with bottom pressure, | |
| 2114 // AND the bottom gas | |
| 2115 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) | |
| 2116 * (1.0 - calc_N2_ratio - calc_He_ratio); | |
| 2117 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; | |
| 2118 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; | |
| 2119 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); | |
| 2120 | |
| 2121 // Ascent time (rounded up): | |
| 2122 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); | |
| 2123 | |
| 2124 for(t=0; t<time; ++t) | |
| 2125 { | |
| 2126 deco_calc_CNS_fraction(); | |
| 2127 sim_dive_mins++; | |
| 2128 } | |
| 2129 | |
| 2130 //---- Do all further stops ------------------------------------------ | |
| 2131 for(i=0; i<NUM_STOPS; ++i) | |
| 2132 { | |
| 111 | 2133 overlay unsigned char stop_gas; |
| 0 | 2134 |
|
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2135 //---- Get next stop --------------------------------------------- |
| 0 | 2136 { |
| 2137 time = char_O_deco_time[(NUM_STOPS-1)-i]; | |
| 2138 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i]; | |
| 111 | 2139 stop_gas = char_O_deco_gas[(NUM_STOPS-1)-i]; |
| 0 | 2140 } |
| 2141 if( time == 0 ) continue; | |
| 2142 | |
| 2143 //---- Gas Switch ? ---------------------------------------------- | |
| 111 | 2144 if( stop_gas != sim_gas_last_used ) |
| 0 | 2145 { |
| 111 | 2146 sim_gas_last_depth = deco_gas_change[stop_gas-1]; |
| 2147 sim_gas_last_used = stop_gas; | |
| 0 | 2148 gas_switch_set(); |
| 2149 } | |
| 2150 | |
| 2151 //---- Convert Depth and N2_ratio to ppO2 ------------------------ | |
| 2152 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) | |
| 2153 * (1.0 - calc_N2_ratio - calc_He_ratio); | |
| 2154 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; | |
| 2155 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; | |
| 2156 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); | |
| 2157 | |
| 2158 //---- Apply the stop | |
| 2159 for(t=0; t<time; ++t) | |
| 2160 { | |
| 2161 deco_calc_CNS_fraction(); | |
| 2162 sim_dive_mins++; | |
| 2163 } | |
| 2164 } | |
| 2165 } | |
| 2166 | |
| 2167 //---- Back to normal mode... -------------------------------------------- | |
| 2168 char_I_step_is_1min = 0; | |
| 2169 sim_gas_last_depth = backup_gas_last_depth; | |
| 2170 sim_gas_last_used = backup_gas_last_used; | |
| 2171 sim_dive_mins = backup_dive_mins; | |
| 2172 char_I_actual_ppO2 = backup_actual_ppO2; | |
| 2173 } | |
| 2174 | |
| 2175 ////////////////////////////////////////////////////////////////////////////// | |
| 2176 // deco_calc_CNS_decrease_15min | |
| 2177 // | |
| 2178 // new in v.101 | |
| 2179 // | |
| 2180 // calculates the half time of 90 minutes in 6 steps of 15 min | |
| 2181 // (Used in sleepmode, for low battery mode). | |
| 2182 // | |
| 2183 // Output: int_O_CNS_fraction | |
| 2184 // Uses and Updates: CNS_fraction | |
| 2185 // | |
| 2186 void deco_calc_CNS_decrease_15min(void) | |
| 2187 { | |
| 2188 RESET_C_STACK | |
| 322 | 2189 assert( 0.0 <= CNS_fraction && CNS_fraction <= 9.99 ); |
| 0 | 2190 |
| 2191 CNS_fraction = 0.890899 * CNS_fraction; | |
| 322 | 2192 int_O_CNS_fraction = (unsigned short)(CNS_fraction * 100.0 + 0.5); |
| 0 | 2193 } |
| 2194 | |
| 2195 ////////////////////////////////////////////////////////////////////////////// | |
| 2196 // deco_calc_percentage | |
| 2197 // | |
| 2198 // new in v.101 | |
| 2199 // | |
| 2200 // calculates int_I_temp * char_I_temp / 100 | |
| 2201 // output is int_I_temp | |
| 2202 // | |
| 2203 // Used to compute NoFly remaining time. | |
| 2204 // | |
| 2205 void deco_calc_percentage(void) | |
| 2206 { | |
| 2207 RESET_C_STACK | |
| 2208 | |
| 2209 assert( 60 <= char_I_temp && char_I_temp <= 100 ); | |
| 2210 assert( int_I_temp < 5760 ); // Less than 4 days = 96h... | |
| 2211 | |
| 2212 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); | |
| 2213 | |
| 2214 assert( int_I_temp < 5760 ); // Less than 96h too... | |
| 2215 } | |
| 2216 | |
| 2217 ////////////////////////////////////////////////////////////////////////////// | |
| 2218 // deco_gas_volumes | |
| 2219 // | |
| 2220 // new in v.111 | |
| 2221 // | |
| 2222 // calculates volumes for each gas. | |
| 2223 // | |
| 2224 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. | |
| 2225 // Gas list. | |
| 2226 // char_I_first_gas is the bottom gas. | |
| 2227 // decoplan (char_O_deco_depth, char_O_deco_time). | |
|
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2228 // char_I_bottom_usage is bottom liters/minutes (5 .. 50) or bar/min. |
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2229 // char_I_deco_usage is deco liters/minutes (5 .. 50) or bar/min. |
| 0 | 2230 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
| 2231 // | |
| 2232 void deco_gas_volumes(void) | |
| 2233 { | |
| 2234 overlay float volumes[NUM_GAS]; | |
| 2235 overlay float bottom_usage, deco_usage; | |
| 135 | 2236 overlay unsigned char i; |
| 0 | 2237 overlay unsigned char gas, depth; |
| 348 | 2238 overlay unsigned char lastGasStop; |
| 0 | 2239 RESET_C_STACK |
| 2240 | |
| 289 | 2241 //---- initialize -------------------------------------------------------- |
| 0 | 2242 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
| 2243 volumes[i] = 0.0; | |
| 2244 | |
|
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2245 bottom_usage = char_I_bottom_usage; // In liter/minutes. |
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2246 deco_usage = char_I_deco_usage; // In liter/minutes. |
| 289 | 2247 |
| 2248 // Early return if not defined: | |
| 2249 if( deco_usage <= 0.0 || bottom_usage <= 0.0 ) | |
| 2250 goto done; | |
| 2251 | |
| 2252 //---- Bottom usage ----------------------------------------------------- | |
| 0 | 2253 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
| 2254 gas = char_I_first_gas - 1; | |
| 2255 | |
| 289 | 2256 if( char_I_const_ppO2 == 0 ) |
| 0 | 2257 volumes[gas] |
| 2258 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
| 2259 * char_I_bottom_time // in minutes. | |
| 2260 * bottom_usage; // In liter/minutes. | |
| 2261 | |
| 2262 //---- Ascent usage ------------------------------------------------------ | |
|
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2263 depth = char_I_bottom_depth; |
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2264 lastGasStop = 255; // Allow deco gas at or below bottom depth |
| 0 | 2265 |
| 2266 for(i=0; i<NUM_STOPS; ++i) | |
| 2267 { | |
| 348 | 2268 overlay unsigned char newDepth, time; |
| 0 | 2269 |
| 348 | 2270 time = char_O_deco_time [i]; |
| 2271 if( time == 0 ) break; // End of table: done. | |
| 0 | 2272 |
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2273 newDepth = char_O_deco_depth[i]; |
| 348 | 2274 assert(0 < newDepth && newDepth <= depth); |
| 2275 | |
| 2276 //---- Any gas switch before this stop ------------------------------- | |
| 2277 for(;;) | |
| 2278 { | |
| 2279 overlay unsigned char newGas = 0; | |
|
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2280 overlay unsigned char newStop = 0; // Mark as NO CHANGE yet |
| 348 | 2281 overlay unsigned char j; |
|
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2282 |
| 348 | 2283 for(j=0; j<NUM_GAS; ++j) |
| 2284 { | |
| 2285 // Skip gas without changing depth: | |
| 2286 if( ! char_I_deco_gas_change[j] ) | |
| 2287 continue; | |
| 2288 // Select gas changed between [newDepth .. lastGasStop[ | |
| 2289 // Note that <= means changing gas at BEGINNING of this stop. | |
| 2290 // Note that < means we cant use the same gas twice | |
| 2291 if( newDepth <= char_I_deco_gas_change[j] | |
| 2292 && char_I_deco_gas_change[j] < lastGasStop ) | |
| 2293 { | |
| 2294 // Keep the DEEPEST gas in that range: | |
| 2295 if( char_I_deco_gas_change[j] >= newStop ) | |
| 2296 { | |
| 2297 newGas = j; | |
| 2298 newStop = char_I_deco_gas_change[j]; | |
| 2299 } | |
| 2300 } | |
| 2301 } | |
| 0 | 2302 |
| 348 | 2303 // Did we find something ? |
| 2304 if( !newStop ) | |
| 2305 break; | |
| 2306 | |
| 2307 //---- usage BEFORE gas switch (if any), at 10m/min : | |
| 2308 if( depth > newStop ) | |
| 2309 // Plus usage during ascent to the next stop, at 10m/min. | |
| 2310 volumes[gas] += ((depth+newStop)*0.05 + 1.0) // average depth --> bar. | |
| 2311 * (depth-newStop)*0.1 // metre --> min | |
| 2312 * deco_usage; | |
| 2313 | |
| 2314 //---- Do gas switch: | |
| 2315 gas = newGas; | |
| 0 | 2316 |
| 348 | 2317 lastGasStop = newStop; // Mark last used gas |
| 2318 if( newStop < depth ) // ascent to gas switch, | |
| 2319 depth = newStop; | |
| 2320 } | |
| 2321 | |
| 2322 // Are we back to gas from the deco list (just in case): | |
| 2323 assert(gas == char_O_deco_gas[i]-1); | |
| 2324 | |
| 2325 //---- usage AFTER gas switch (if any), at 10m/min : | |
| 2326 if( depth > newDepth ) | |
| 2327 volumes[gas] += ((depth+newDepth)*0.05 + 1.0) // average depth --> bar. | |
| 2328 * (depth-newDepth)*0.1 // metre --> min | |
| 2329 * deco_usage; | |
| 2330 | |
| 2331 //---- Do stop: | |
| 0 | 2332 depth = newDepth; |
| 2333 | |
| 289 | 2334 //---- Usage at stop: |
| 2335 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. | |
| 2336 * time // in minutes. | |
| 2337 * deco_usage; // in xxx / min @ 1bar. | |
| 0 | 2338 } |
| 2339 | |
| 2340 // From last stop to surface | |
| 289 | 2341 volumes[gas] += (depth*0.05 + 1.0) // avg depth --> bar. |
| 2342 * depth * 0.1 // time to surface, in minutes. | |
| 2343 * deco_usage; // in xxx / min @ 1bar. | |
| 0 | 2344 |
| 2345 //---- convert results for the ASM interface ----------------------------- | |
| 289 | 2346 done: |
| 0 | 2347 for(i=0; i<NUM_GAS; ++i) |
| 2348 if( volumes[i] > 65534.0 ) | |
| 2349 int_O_gas_volumes[i] = 65535; | |
| 2350 else | |
| 2351 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); | |
| 2352 } | |
| 2353 | |
| 2354 ////////////////////////////////////////////////////////////////////////////// | |
| 2355 | |
| 2356 void deco_push_tissues_to_vault(void) | |
| 2357 { | |
| 2358 overlay unsigned char x; | |
| 2359 RESET_C_STACK | |
| 2360 | |
| 2361 cns_vault = CNS_fraction; | |
| 2362 low_depth_vault = low_depth; | |
| 2363 | |
| 2364 for (x=0;x<NUM_COMP;x++) | |
| 2365 { | |
| 2366 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
| 2367 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
| 2368 } | |
| 2369 } | |
| 2370 | |
| 2371 void deco_pull_tissues_from_vault(void) | |
| 2372 { | |
| 2373 overlay unsigned char x; | |
| 2374 RESET_C_STACK | |
| 2375 | |
| 2376 for (x=0; x<NUM_COMP; x++) | |
| 2377 { | |
| 2378 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
| 2379 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
| 2380 } | |
| 2381 | |
| 2382 // Restore both CNS variable, too. | |
| 2383 CNS_fraction = cns_vault; | |
| 322 | 2384 int_O_CNS_fraction = (unsigned short)(CNS_fraction * 100.0 + 0.5); |
| 0 | 2385 |
| 2386 // GF history too: | |
| 2387 low_depth = low_depth_vault; | |
| 2388 locked_GF_step = GF_delta / low_depth; | |
| 2389 } | |
| 2390 | |
| 2391 ////////////////////////////////////////////////////////////////////////////// | |
| 2392 // | |
| 2393 #ifndef CROSS_COMPILE | |
| 2394 void main() {} | |
| 2395 #endif |