Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 699:8b8c0dd0fa62
2.61beta release
author | heinrichsweikamp |
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date | Thu, 07 Mar 2013 11:04:04 +0100 |
parents | 1a5804e21d3f |
children | d36f060e8203 |
rev | line source |
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116 | 1 // ************************************************************** |
2 // p2_deco.c | |
3 // | |
4 // Created on: 12.05.2009 | |
5 // Author: chsw | |
6 // | |
7 // ************************************************************** | |
8 | |
9 ////////////////////////////////////////////////////////////////////////////// | |
10 // OSTC - diving computer code | |
532 | 11 // Copyright (C) 2011 HeinrichsWeikamp GbR |
116 | 12 // |
13 // This program is free software: you can redistribute it and/or modify | |
14 // it under the terms of the GNU General Public License as published by | |
15 // the Free Software Foundation, either version 3 of the License, or | |
16 // (at your option) any later version. | |
17 // | |
18 // This program is distributed in the hope that it will be useful, | |
19 // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 // GNU General Public License for more details. | |
22 // | |
23 // You should have received a copy of the GNU General Public License | |
24 // along with this program. If not, see <http://www.gnu.org/licenses/>. | |
25 // | |
26 ////////////////////////////////////////////////////////////////////////////// | |
27 | |
28 // ***************************** | |
29 // ** I N T R O D U C T I O N ** | |
30 // ***************************** | |
31 // | |
32 // OSTC | |
33 // | |
34 // code: | |
35 // p2_deco_main_c_v101.c | |
36 // part2 of the OSTC code | |
37 // code with constant O2 partial pressure routines | |
38 // under construction !! | |
39 // | |
40 // summary: | |
41 // decompression routines | |
42 // for the OSTC experimental project | |
43 // written by Christian Weikamp | |
44 // last revision __________ | |
45 // comments added _________ | |
46 // | |
47 // additional files: | |
48 // p2_tables_v100.romdata (other files) | |
49 // 18f4685_ostc_v100.lkr (linker script) | |
50 // | |
51 // history: | |
52 // 01/03/08 v100: first release candidate | |
53 // 03/13/08 v101: start of programming ppO2 code | |
54 // 03/13/25 v101a: backup of interrim version with ppO2 calculation | |
55 // 03/13/25 v101: open circuit gas change during deco | |
56 // 03/13/25 v101: CNS_fraction calculation | |
57 // 03/13/26 v101: optimization of tissue calc routines | |
58 // 07/xx/08 v102a: debug of bottom time routine | |
59 // 09/xx/08 v102d: Gradient Factor Model implemenation | |
60 // 10/10/08 v104: renamed to build v103 for v118 stable | |
171 | 61 // 10/14/08 v104: integration of char_I_depth_last_deco for Gradient Model |
116 | 62 // 03/31/09 v107: integration of FONT Incon24 |
63 // 05/23/10 v109: 5 gas changes & 1 min timer | |
64 // 07/13/10 v110: cns vault added | |
65 // 12/25/10 v110: split in three files (deco.c, main.c, definitions.h) | |
163 | 66 // 2011/01/20: [jDG] Create a common file included in ASM and C code. |
167 | 67 // 2011/01/23: [jDG] Added read_custom_function(). |
203 | 68 // 2011/01/24: [jDG] Make ascenttime an short. No more overflow! |
169
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69 // 2011/01/25: [jDG] Fusion deco array for both models. |
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70 // 2011/01/25: [jDG] Use CF(54) to reverse deco order. |
193 | 71 // 2011/02/11: [jDG] Reworked gradient-factor implementation. |
197 | 72 // 2011/02/13: [jDG] CF55 for additional gas switch delay in decoplan. |
275
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73 // 2011/02/15: [jDG] Fixed inconsistencies introduced by gas switch delays. |
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74 // 2011/03/21: [jDG] Added gas consumption (CF56 & CF57) evaluation for OCR mode. |
293
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75 // 2011/04/10: [jDG] Use timer TMR3 to limit loops in calc_hauptroutine_calc_deco(). |
275
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76 // 2011/04/15: [jDG] Store low_depth in 32bits (w/o rounding), for a better stability. |
293
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77 // 2011/04/25: [jDG] Added 1mn mode for CNS calculation, to allow it for decoplanning. |
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78 // 2011/04/27: [jDG] Fixed char_O_gradient_factor calculation when model uses gradient-factor. |
334
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79 // 2011/05/02: [jDG] Added "Future TTS" function (CF58). |
338 | 80 // 2011/05/17: [jDG] Various cleanups. |
511
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81 // 2011/08/08: [jDG] Computes CNS during deco planning ascent. |
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82 // 2011/11/24: [jDG] Slightly faster and better NDL computation. |
562 | 83 // 2011/12/17: [mH] Remove of the useless debug stuff |
561 | 84 // 2012/02/24: [jDG] Remove missed stop bug. |
562 | 85 // 2012/02/25: [jDG] Looking for a more stable LOW grad factor reference. |
646 | 86 // 2012/09/10: [mH] Fill char_O_deco_time_for_log for logbook write |
87 // 2012/10/05: [jDG] Better deco_gas_volumes accuracy (average depth, switch between stop). | |
697 | 88 // 2013/03/05: [jDG] Should vault low_depth too. |
698 | 89 // 2013/03/05: [jDG] Wrobell remark: ascent_to_first_stop works better with finer steps (2sec). |
116 | 90 // |
167 | 91 // TODO: |
92 // + Allow to abort MD2 calculation (have to restart next time). | |
93 // | |
94 // Literature: | |
200 | 95 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
116 | 96 // 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 |
97 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
98 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
99 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
100 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
167 | 101 // |
102 // | |
116 | 103 |
104 // ********************* | |
105 // ** I N C L U D E S ** | |
106 // ********************* | |
107 #include <math.h> | |
167 | 108 |
192 | 109 // *********************************************** |
110 // ** V A R I A B L E S D E F I N I T I O N S ** | |
111 // *********************************************** | |
112 | |
113 #include "p2_definitions.h" | |
275
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114 #define TEST_MAIN |
509 | 115 #include "../OSTC_code_asm_part1/shared_definitions.h" |
192 | 116 |
200 | 117 // Water vapour partial pressure in the lumb. |
527 | 118 #define ppWater 0.0627 |
317 | 119 #define METER_TO_BAR 0.09985 |
120 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
200 | 121 |
491
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122 // Surface security factor |
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123 #define SURFACE_DESAT_FACTOR 0.7042 |
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124 |
167 | 125 // ************************* |
126 // ** P R O T O T Y P E S ** | |
127 // ************************* | |
128 | |
129 static void calc_hauptroutine(void); | |
130 static void calc_nullzeit(void); | |
131 | |
192 | 132 static void calc_tissue(PARAMETER unsigned char period); |
258 | 133 static void calc_limit(void); |
192 | 134 |
167 | 135 static void clear_tissue(void); |
136 static void calc_ascenttime(void); | |
137 static void update_startvalues(void); | |
169
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138 static void clear_deco_table(void); |
471 | 139 static unsigned char update_deco_table(void); |
192 | 140 |
141 static void sim_tissue(PARAMETER unsigned char period); | |
142 static void sim_limit(PARAMETER float GF_current); | |
312
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143 static void sim_extra_time(void); |
368 | 144 static void calc_dive_interval(void); |
312
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145 |
167 | 146 static void calc_gradient_factor(void); |
147 static void calc_wo_deco_step_1_min(void); | |
148 | |
149 static void calc_hauptroutine_data_input(void); | |
150 static void calc_hauptroutine_update_tissues(void); | |
151 static void calc_hauptroutine_calc_deco(void); | |
169
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152 static void sim_ascent_to_first_stop(void); |
167 | 153 |
241 | 154 static unsigned char gas_switch_deepest(void); |
155 static void gas_switch_set(void); | |
217 | 156 |
241 | 157 static unsigned char calc_nextdecodepth(void); |
116 | 158 |
200 | 159 //---- Bank 4 parameters ----------------------------------------------------- |
601
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160 #ifndef UNIX |
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161 # pragma udata bank4=0x400 |
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162 #endif |
116 | 163 |
164 static float GF_low; | |
165 static float GF_high; | |
166 static float GF_delta; | |
192 | 167 static float locked_GF_step; // GF_delta / low_depth |
168 | |
169 static unsigned char temp_depth_limit; | |
695 | 170 float low_depth; // Depth of deepest stop |
171 | 171 |
192 | 172 // Simulation context: used to predict ascent. |
695 | 173 unsigned char sim_lead_tissue_no; // Leading compatiment number. |
174 float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
116 | 175 |
192 | 176 // Real context: what we are doing now. |
177 static float calc_lead_tissue_limit; // | |
116 | 178 |
338 | 179 static unsigned char internal_deco_time[NUM_STOPS]; |
180 static unsigned char internal_deco_depth[NUM_STOPS]; | |
116 | 181 |
182 static float cns_vault; | |
697 | 183 static float low_depth_vault; |
339 | 184 static float pres_tissue_N2_vault[NUM_COMP]; |
185 static float pres_tissue_He_vault[NUM_COMP]; | |
116 | 186 |
163 | 187 //---- Bank 5 parameters ----------------------------------------------------- |
601
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188 #ifndef UNIX |
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189 # pragma udata bank5=0x500 |
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190 #endif |
163 | 191 |
167 | 192 static unsigned char ci; |
116 | 193 static float pres_respiration; |
194 static float pres_surface; | |
195 static float temp_deco; | |
236 | 196 static float ppN2; |
200 | 197 static float ppHe; |
116 | 198 static float temp_tissue; |
200 | 199 static float N2_ratio; // Breathed gas nitrogen ratio. |
200 static float He_ratio; // Breathed gas helium ratio. | |
201 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
202 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
203 static float var_He_a; // Bühlmann a, for current He tissue. | |
204 static float var_He_b; // Bühlmann b, for current He tissue. | |
205 static float var_N2_e; // Exposition, for current N2 tissue. | |
206 static float var_He_e; // Exposition, for current He tissue. | |
509 | 207 static float var_N2_ht; // Half-time for current N2 tissue. |
208 static float var_He_ht; // Half-time for current N2 tissue. | |
116 | 209 |
338 | 210 static float pres_diluent; // new in v.101 |
211 static float const_ppO2; // new in v.101 | |
116 | 212 |
241 | 213 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
214 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
203 | 215 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
216 static unsigned short sim_dive_mins; // Simulated dive time. | |
200 | 217 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
218 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
219 static float CNS_fraction; // new in v.101 | |
220 static float float_saturation_multiplier; // new in v.101 | |
221 static float float_desaturation_multiplier; // new in v.101 | |
338 | 222 static float float_deco_distance; // new in v.101 |
223 static char flag_in_divemode; // new in v.108 | |
167 | 224 |
338 | 225 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
167 | 226 |
163 | 227 //---- Bank 6 parameters ----------------------------------------------------- |
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228 #ifndef UNIX |
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229 # pragma udata bank6=0x600 |
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230 #endif |
116 | 231 |
339 | 232 float pres_tissue_N2[NUM_COMP]; |
233 float pres_tissue_He[NUM_COMP]; | |
509 | 234 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. |
235 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
116 | 236 |
163 | 237 //---- Bank 7 parameters ----------------------------------------------------- |
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238 #ifndef UNIX |
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239 # pragma udata bank7=0x700 |
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240 #endif |
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241 |
509 | 242 // EMPTY ... |
116 | 243 |
163 | 244 //---- Bank 8 parameters ----------------------------------------------------- |
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245 #ifndef UNIX |
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246 # pragma udata bank8=0x800 |
163 | 247 |
601
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248 static char md_pi_subst[256]; |
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249 # define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
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250 |
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251 #endif |
116 | 252 |
163 | 253 //---- Bank 9 parameters ----------------------------------------------------- |
601
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254 #ifndef UNIX |
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255 # pragma udata bank9=0x900 |
116 | 256 |
601
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257 static char md_state[48]; // DONT MOVE : has to be at the beginning of bank 9 for the asm code!!! |
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258 #endif |
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259 |
116 | 260 |
167 | 261 ////////////////////////////////////////////////////////////////////////////// |
262 ////////////////////////////////////////////////////////////////////////////// | |
263 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
264 ////////////////////////////////////////////////////////////////////////////// | |
265 ////////////////////////////////////////////////////////////////////////////// | |
266 // | |
267 // End of PROM code is 17F00, So push tables on PROM top... | |
268 // | |
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269 #ifndef UNIX |
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270 # pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. |
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271 #endif |
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272 |
167 | 273 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) |
116 | 274 |
167 | 275 // Magic table to compute the MD2 HASH |
276 // | |
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277 #ifndef UNIX |
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278 # pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... |
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279 rom const rom unsigned short md_pi[] = |
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280 { |
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281 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 |
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282 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA |
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283 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 |
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284 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A |
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285 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 |
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286 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 |
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287 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 |
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288 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 |
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289 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 |
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290 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F |
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291 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 |
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292 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 |
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293 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A |
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294 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 |
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295 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A |
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296 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 |
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297 }; |
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298 #endif |
116 | 299 |
167 | 300 ////////////////////////////////////////////////////////////////////////////// |
301 ////////////////////////////////////////////////////////////////////////////// | |
302 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
303 ////////////////////////////////////////////////////////////////////////////// | |
304 ////////////////////////////////////////////////////////////////////////////// | |
305 // | |
116 | 306 // all new in v.102 |
307 // moved from 0x0D000 to 0x0C000 in v.108 | |
601
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308 #ifndef UNIX |
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309 # pragma code p2_deco = 0x0C000 |
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310 #endif |
116 | 311 |
167 | 312 ////////////////////////////////////////////////////////////////////////////// |
313 ////////////////////////////////////////////////////////////////////////////// | |
314 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
315 ////////////////////////////////////////////////////////////////////////////// | |
316 ////////////////////////////////////////////////////////////////////////////// | |
317 | |
235 | 318 ////////////////////////////////////////////////////////////////////////////// |
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319 // Bump to blue-screen when an assert is wrong |
235 | 320 #ifdef __DEBUG |
321 void assert_failed(PARAMETER short int line) | |
322 { | |
681 | 323 extern void DISP_resetdebugger(void); |
235 | 324 extern unsigned short temp10; |
325 | |
257
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326 temp10 = line; // Show source line number as stack depth. |
681 | 327 DISP_resetdebugger(); |
235 | 328 } |
329 #endif | |
257
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330 |
235 | 331 ////////////////////////////////////////////////////////////////////////////// |
332 // When calling C code from ASM context, the data stack pointer and | |
333 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
334 | |
335 #ifdef CROSS_COMPILE | |
336 # define RESET_C_STACK | |
337 #else | |
338 # ifdef __DEBUG | |
339 # define RESET_C_STACK fillDataStack(); | |
340 void fillDataStack(void) | |
341 { | |
342 _asm | |
343 LFSR 1,C_STACK | |
344 MOVLW 0xCC | |
345 loop: MOVWF POSTINC1,0 | |
346 TSTFSZ FSR1L,0 | |
347 BRA loop | |
348 | |
349 LFSR 1,C_STACK | |
350 LFSR 2,C_STACK | |
351 _endasm | |
352 } | |
353 # else | |
354 # define RESET_C_STACK \ | |
355 _asm \ | |
356 LFSR 1, C_STACK \ | |
357 LFSR 2, C_STACK \ | |
358 _endasm | |
359 # endif | |
360 #endif | |
361 | |
362 ////////////////////////////////////////////////////////////////////////////// | |
257
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363 // Read CF values from the C code. |
235 | 364 |
488 | 365 #ifdef CROSS_COMPILE |
366 // Full description of the OSTC EEPROM map, including CF values. | |
367 # include "OSTC_eeprom.h" | |
368 #endif | |
369 | |
203 | 370 static short read_custom_function(PARAMETER unsigned char cf) |
167 | 371 { |
184 | 372 #ifdef CROSS_COMPILE |
564 | 373 return (cf & 32) ? eeprom.bank1_CF[cf-32].value.lo |
374 : eeprom.bank0_CF[cf ].value.lo; | |
184 | 375 #else |
167 | 376 extern unsigned char hi, lo; |
377 extern void getcustom15(); | |
378 _asm | |
379 movff cf,WREG | |
380 call getcustom15,0 | |
381 movff lo,PRODL | |
382 movff hi,PRODH | |
383 _endasm | |
184 | 384 #endif |
167 | 385 } |
386 | |
387 ////////////////////////////////////////////////////////////////////////////// | |
257
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388 // Fast subroutine to read RTC timer 3. |
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389 // Note: result is in 1/32 of msecs. |
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390 static unsigned short tmr3(void) |
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391 { |
261 | 392 #ifndef CROSS_COMPILE |
257
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393 _asm |
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394 movff 0xfb2,PRODL // TMR3L |
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395 movff 0xfb3,PRODH // TMR3H |
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396 _endasm // result in PRODH:PRODL. |
261 | 397 #else |
398 return 0; | |
399 #endif | |
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400 } |
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401 |
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402 ////////////////////////////////////////////////////////////////////////////// |
258 | 403 // read buhlmann tables A and B for compatriment ci |
404 // | |
405 static void read_buhlmann_coefficients(void) | |
165 | 406 { |
184 | 407 #ifndef CROSS_COMPILE |
167 | 408 // Note: we don't use far rom pointer, because the |
338 | 409 // 24 bits is too complex, hence we have to set |
167 | 410 // the UPPER page ourself... |
411 // --> Set zero if tables are moved to lower pages ! | |
412 _asm | |
413 movlw 1 | |
414 movwf TBLPTRU,0 | |
415 _endasm | |
184 | 416 #endif |
258 | 417 |
564 | 418 assert( ci < NUM_COMP ); |
338 | 419 |
420 // Use an interleaved array (AoS) to access coefficients with a | |
421 // single addressing. | |
422 { | |
423 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
424 var_N2_a = *ptr++; | |
425 var_N2_b = *ptr++; | |
426 var_He_a = *ptr++; | |
427 var_He_b = *ptr++; | |
428 } | |
258 | 429 } |
430 | |
431 ////////////////////////////////////////////////////////////////////////////// | |
432 // read buhlmann tables for compatriment ci | |
433 // If period == 0 : 2sec interval | |
434 // 1 : 1 min interval | |
435 // 2 : 10 min interval. | |
436 static void read_buhlmann_times(PARAMETER char period) | |
437 { | |
438 #ifndef CROSS_COMPILE | |
439 // Note: we don't use far rom pointer, because the | |
440 // 24 bits is to complex, hence we have to set | |
441 // the UPPER page ourself... | |
442 // --> Set zero if tables are moved to lower pages ! | |
443 _asm | |
444 movlw 1 | |
445 movwf TBLPTRU,0 | |
446 _endasm | |
447 #endif | |
338 | 448 |
564 | 449 assert( ci < NUM_COMP ); |
258 | 450 |
165 | 451 // Integration intervals. |
167 | 452 switch(period) |
165 | 453 { |
454 case 0: //---- 2 sec ----------------------------------------------------- | |
338 | 455 { |
456 overlay rom const float* ptr = &e2secs[2*ci]; | |
457 var_N2_e = *ptr++; | |
458 var_He_e = *ptr++; | |
459 } | |
165 | 460 break; |
461 | |
462 case 1: //---- 1 min ----------------------------------------------------- | |
338 | 463 { |
464 overlay rom const float* ptr = &e1min[2*ci]; | |
465 var_N2_e = *ptr++; | |
466 var_He_e = *ptr++; | |
467 } | |
165 | 468 break; |
469 | |
470 case 2: //---- 10 min ---------------------------------------------------- | |
338 | 471 { |
472 overlay rom const float* ptr = &e10min[2*ci]; | |
473 var_N2_e = *ptr++; | |
474 var_He_e = *ptr++; | |
475 } | |
165 | 476 break; |
197 | 477 |
478 default: | |
527 | 479 assert(0); // Never go there... |
165 | 480 } |
481 } | |
482 | |
483 ////////////////////////////////////////////////////////////////////////////// | |
509 | 484 // read buhlmann tables for compatriment ci |
485 // | |
486 static void read_buhlmann_ht(void) | |
487 { | |
488 | |
489 #ifndef CROSS_COMPILE | |
490 // Note: we don't use far rom pointer, because the | |
491 // 24 bits is to complex, hence we have to set | |
492 // the UPPER page ourself... | |
493 // --> Set zero if tables are moved to lower pages ! | |
494 _asm | |
495 movlw 1 | |
496 movwf TBLPTRU,0 | |
497 _endasm | |
498 #endif | |
499 | |
564 | 500 assert( ci < NUM_COMP ); |
509 | 501 { |
502 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
503 var_N2_ht = *ptr++; | |
504 var_He_ht = *ptr++; | |
505 } | |
506 | |
507 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
508 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
509 } | |
510 | |
511 ////////////////////////////////////////////////////////////////////////////// | |
340
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512 // calc_nextdecodepth |
165 | 513 // |
116 | 514 // new in v.102 |
165 | 515 // |
116 | 516 // INPUT, changing during dive: |
509 | 517 // temp_deco |
192 | 518 // low_depth |
167 | 519 // |
116 | 520 // INPUT, fixed during dive: |
167 | 521 // pres_surface |
522 // GF_delta | |
523 // GF_high | |
524 // GF_low | |
171 | 525 // char_I_depth_last_deco |
167 | 526 // float_deco_distance |
527 // | |
241 | 528 // RETURN TRUE iff a stop is needed. |
529 // | |
116 | 530 // OUTPUT |
171 | 531 // locked_GF_step |
167 | 532 // temp_depth_limt |
192 | 533 // low_depth |
167 | 534 // |
241 | 535 static unsigned char calc_nextdecodepth(void) |
167 | 536 { |
241 | 537 //--- Max ascent speed --------------------------------------------------- |
538 // Recompute leading gas limit, at current depth: | |
317 | 539 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
241 | 540 |
541 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
302 | 542 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
241 | 543 |
544 // Do we need to stop at current depth ? | |
545 overlay unsigned char need_stop = 0; | |
546 | |
547 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
548 | |
212 | 549 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
509 | 550 if( char_I_deco_model != 0 ) |
116 | 551 { |
562 | 552 overlay unsigned char first_stop = 0; |
553 overlay float p; | |
554 | |
567 | 555 sim_limit( GF_low ); |
562 | 556 p = sim_lead_tissue_limit - pres_surface; |
695 | 557 p *= BAR_TO_METER; |
562 | 558 if( p <= 0.0f ) |
559 goto no_deco_stop; // We can surface directly... | |
512
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560 |
695 | 561 // Store the deepest point needing a deco stop as the LOW reference for GF. |
562 // NOTE: following stops will be validated using this LOW-HIGH gf scale, | |
563 // so if we want to keep coherency, we should not validate this stop | |
564 // yet, but apply the search to it, as for all the following stops afterward. | |
565 if( p > low_depth ) | |
566 { | |
567 low_depth = p; | |
568 locked_GF_step = GF_delta / low_depth; | |
569 } | |
570 | |
562 | 571 if( p < min_depth ) |
572 goto no_deco_stop; // First stop is higher than 1' ascent. | |
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573 |
695 | 574 // Round to multiple of 3m. |
575 first_stop = 3 * (short)(0.9995f + p*0.333333f); | |
562 | 576 assert( first_stop < 128 ); |
577 | |
578 // Apply correction for the shallowest stop. | |
579 if( first_stop == 3 ) // new in v104 | |
580 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
171 | 581 |
562 | 582 // We have a stop candidate. |
583 // But maybe ascending to the next stop will diminish the constraint, | |
584 // because the GF might decrease more than the preassure gradient... | |
585 while(first_stop > 0) | |
586 { | |
587 overlay unsigned char next_stop; // Next depth (0..90m) | |
171 | 588 |
562 | 589 // Check max speed, or reaching surface. |
590 if( first_stop <= min_depth ) | |
591 goto no_deco_stop; | |
171 | 592 |
562 | 593 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
594 next_stop = 0; | |
595 else if( first_stop == 6 ) | |
596 next_stop = char_I_depth_last_deco; | |
597 else | |
598 next_stop = first_stop - 3; // Index of next (upper) stop. | |
599 | |
600 // Total preassure at the new stop candidate: | |
695 | 601 p = next_stop * METER_TO_BAR |
602 + pres_surface; | |
167 | 603 |
695 | 604 // Recompute limit for this new stop: |
605 if( !low_depth || next_stop > low_depth ) | |
606 sim_limit( GF_low ); | |
607 else | |
608 sim_limit( GF_high - next_stop * locked_GF_step ); | |
192 | 609 |
695 | 610 // Check upper limit (lowest ambiant pressure tolerated): |
611 if( sim_lead_tissue_limit >= p ) | |
612 goto deco_stop_found; // Ascent to next_stop forbiden. | |
562 | 613 |
614 // Else, validate that stop and loop... | |
615 first_stop = next_stop; | |
616 } | |
171 | 617 |
562 | 618 no_deco_stop: |
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619 temp_depth_limit = min_depth; |
562 | 620 goto done; |
212 | 621 |
695 | 622 deco_stop_found: |
562 | 623 // next stop is the last validated depth found, aka first_stop |
624 need_stop = 1; // Hit. | |
625 temp_depth_limit = first_stop; // Stop depth, in meter. | |
626 | |
627 done: | |
628 ; | |
116 | 629 } |
167 | 630 else //---- ZH-L16 model ------------------------------------------------- |
116 | 631 { |
192 | 632 overlay float pres_gradient; |
633 | |
634 // Original model | |
116 | 635 // optimized in v.101 |
171 | 636 // char_I_depth_last_deco included in v.101 |
116 | 637 |
192 | 638 // Compute sim_lead_tissue_limit too, but just once. |
639 sim_limit(1.0); | |
640 | |
641 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
167 | 642 if (pres_gradient >= 0) |
116 | 643 { |
317 | 644 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
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645 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
241 | 646 need_stop = 1; // Hit. |
647 | |
648 // Implement last stop at 4m/5m/6m... | |
649 if( temp_depth_limit == 3 ) | |
650 temp_depth_limit = char_I_depth_last_deco; | |
171 | 651 } |
116 | 652 else |
241 | 653 temp_depth_limit = 0; |
171 | 654 } |
212 | 655 |
217 | 656 //---- Check gas change -------------------------------------------------- |
241 | 657 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
658 | |
659 return need_stop; | |
167 | 660 } |
116 | 661 |
167 | 662 ////////////////////////////////////////////////////////////////////////////// |
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663 // copy_deco_table |
167 | 664 // |
169
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665 // Buffer the stops, once computed, so we can continue to display them |
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666 // while computing the next set. |
167 | 667 // |
169
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668 static void copy_deco_table(void) |
116 | 669 { |
169
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670 // Copy depth of the first (deepest) stop, because when reversing |
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671 // order, it will be hard to find... |
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672 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
169
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673 char_O_first_deco_time = internal_deco_time [0]; |
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674 |
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675 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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676 { |
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677 overlay unsigned char x, y; |
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678 |
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679 //---- First: search the first non-null depth |
339 | 680 for(x=(NUM_STOPS-1); x != 0; --x) |
169
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681 if( internal_deco_depth[x] != 0 ) break; |
116 | 682 |
169
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683 //---- Second: copy to output table (in reverse order) |
338 | 684 for(y=0; y<NUM_STOPS; y++, --x) |
169
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685 { |
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686 char_O_deco_depth[y] = internal_deco_depth[x]; |
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687 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
169
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688 char_O_deco_time [y] = internal_deco_time [x]; |
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689 |
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690 // Stop only once the last transfer is done. |
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691 if( x == 0 ) break; |
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692 } |
116 | 693 |
169
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694 //---- Third: fill table end with null |
339 | 695 for(y++; y<NUM_STOPS; y++) |
169
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696 { |
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697 char_O_deco_time [y] = 0; |
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698 char_O_deco_depth[y] = 0; |
630
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699 char_O_deco_time_for_log[y] = 0; |
169
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700 } |
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701 } |
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702 else //---- Straight copy ------------------------------------------------ |
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703 { |
630
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704 overlay unsigned char x, y; |
167 | 705 |
339 | 706 for(x=0; x<NUM_STOPS; x++) |
169
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707 { |
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708 char_O_deco_depth[x] = internal_deco_depth[x]; |
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709 char_O_deco_time [x] = internal_deco_time [x]; |
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710 } |
630
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711 |
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712 //Now fill the char_O_deco_time_for_log array |
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713 //---- First: search the first non-null depth |
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714 for(x=(NUM_STOPS-1); x != 0; --x) |
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715 if( internal_deco_depth[x] != 0 ) break; |
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716 |
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717 //---- Second: copy to output table (in reverse order) |
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718 for(y=0; y<NUM_STOPS; y++, --x) |
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719 { |
633
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720 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
630
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721 |
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722 // Stop only once the last transfer is done. |
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723 if( x == 0 ) break; |
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724 } |
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725 |
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726 //---- Third: fill table end with null |
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727 for(y++; y<NUM_STOPS; y++) |
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728 { |
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729 char_O_deco_time_for_log [y] = 0; |
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730 } |
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731 |
169
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732 } |
167 | 733 } |
116 | 734 |
167 | 735 ////////////////////////////////////////////////////////////////////////////// |
116 | 736 // temp_tissue_safety // |
167 | 737 // |
116 | 738 // outsourced in v.102 |
167 | 739 // |
740 // Apply safety factors for brand ZH-L16 model. | |
741 // | |
742 static void temp_tissue_safety(void) | |
116 | 743 { |
197 | 744 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
745 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
746 | |
167 | 747 if( char_I_deco_model == 0 ) |
116 | 748 { |
491
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749 if( temp_tissue < 0.0 ) |
126 | 750 temp_tissue *= float_desaturation_multiplier; |
116 | 751 else |
126 | 752 temp_tissue *= float_saturation_multiplier; |
116 | 753 } |
167 | 754 } |
116 | 755 |
167 | 756 ////////////////////////////////////////////////////////////////////////////// |
757 ////////////////////////////////////////////////////////////////////////////// | |
116 | 758 // ** THE JUMP-IN CODE ** |
759 // ** for the asm code ** | |
167 | 760 ////////////////////////////////////////////////////////////////////////////// |
761 ////////////////////////////////////////////////////////////////////////////// | |
122
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762 |
167 | 763 ////////////////////////////////////////////////////////////////////////////// |
169
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764 // Called every 2 seconds during diving. |
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765 // update tissues every time. |
184 | 766 // |
169
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767 // Every 6 seconds (or slower when TTS > 16): |
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768 // - update deco table (char_O_deco_time/depth) with new values. |
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769 // - update ascent time, |
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770 // - set status to zero (so we can check there is new results). |
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771 // |
116 | 772 void deco_calc_hauptroutine(void) |
773 { | |
122
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774 RESET_C_STACK |
116 | 775 calc_hauptroutine(); |
776 int_O_desaturation_time = 65535; | |
777 } | |
778 | |
167 | 779 ////////////////////////////////////////////////////////////////////////////// |
184 | 780 // Reset decompression model: |
781 // + Set all tissues to equilibrium with Air at ambient pressure. | |
782 // + Reset last stop to 0m | |
783 // + Reset all model output. | |
116 | 784 void deco_clear_tissue(void) |
785 { | |
122
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786 RESET_C_STACK |
116 | 787 clear_tissue(); |
788 } | |
789 | |
167 | 790 ////////////////////////////////////////////////////////////////////////////// |
278 | 791 // Called every 1 min during decoplanning. |
792 // Update tissues for 1 min. | |
793 // | |
794 void deco_calc_tissue(void) | |
795 { | |
796 RESET_C_STACK | |
797 calc_hauptroutine_update_tissues(); | |
798 } | |
799 | |
800 ////////////////////////////////////////////////////////////////////////////// | |
167 | 801 |
116 | 802 void deco_calc_wo_deco_step_1_min(void) |
803 { | |
122
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804 RESET_C_STACK |
116 | 805 calc_wo_deco_step_1_min(); |
806 deco_calc_desaturation_time(); | |
807 } | |
808 | |
167 | 809 ////////////////////////////////////////////////////////////////////////////// |
810 | |
368 | 811 void deco_calc_dive_interval(void) |
812 { | |
813 RESET_C_STACK | |
814 calc_dive_interval(); | |
815 } | |
816 | |
241 | 817 ////////////////////////////////////////////////////////////////////////////// |
818 // Find current gas in the list (if any). | |
819 // | |
513 | 820 // Input: char_I_current_gas = 1..6 |
241 | 821 // |
513 | 822 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. |
241 | 823 // |
824 static void gas_switch_find_current(void) | |
825 { | |
513 | 826 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
247
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827 |
388 | 828 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 |
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829 { |
388 | 830 sim_gas_last_used = char_I_current_gas; |
831 | |
832 // Note: if current is first gas, we must find it, but not set | |
833 // last depth change to surface. | |
834 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
835 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
241 | 836 } |
388 | 837 else |
838 sim_gas_last_used = 0; // Gas 6 = manual set | |
241 | 839 } |
840 | |
167 | 841 ////////////////////////////////////////////////////////////////////////////// |
217 | 842 // Find deepest available gas. |
201 | 843 // |
241 | 844 // Input: temp_depth_limit, |
845 // deco_gas_change[] | |
846 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
212 | 847 // |
241 | 848 // RETURNS TRUE if a stop is needed for gas switch. |
849 // | |
850 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
212 | 851 // |
241 | 852 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
853 // are null), or during the ascent to make sure we are not passing a | |
854 // stop (in which case both can be already set). | |
855 // | |
856 static unsigned char gas_switch_deepest(void) | |
201 | 857 { |
241 | 858 overlay unsigned char switch_deco = 0, switch_last = 0; |
201 | 859 |
860 if (char_I_const_ppO2 == 0) | |
861 { | |
225 | 862 overlay unsigned char j; |
863 | |
241 | 864 // Loop over all enabled gas, to find the deepest one, |
340
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865 // above last used gas, but below temp_depth_limit. |
338 | 866 for(j=0; j<NUM_GAS; ++j) |
225 | 867 { |
241 | 868 // Gas not (yet) allowed ? Skip ! |
869 if( temp_depth_limit > deco_gas_change[j] ) | |
870 continue; | |
871 | |
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872 // Gas deeper (or equal) than the current one ? Skip ! |
241 | 873 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
874 continue; | |
875 | |
876 // First, or deeper ? | |
247
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877 if( switch_deco < deco_gas_change[j] ) |
241 | 878 { |
879 switch_deco = deco_gas_change[j]; | |
388 | 880 switch_last = j+1; // 1..5 |
241 | 881 } |
225 | 882 } |
201 | 883 } |
884 | |
203 | 885 // If there is a better gas available |
241 | 886 if( switch_deco ) |
201 | 887 { |
646 | 888 unsigned char delay; |
889 delay = read_custom_function(55); | |
555
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890 |
241 | 891 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
201 | 892 |
241 | 893 // Should restart gas-switch delay only when gas do changes... |
894 assert( sim_gas_delay <= sim_dive_mins ); | |
217 | 895 |
241 | 896 sim_gas_last_depth = switch_deco; |
897 sim_gas_last_used = switch_last; | |
555
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898 sim_gas_delay = delay |
540
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899 + sim_dive_mins; |
217 | 900 |
555
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901 if( delay ) |
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902 { |
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903 temp_depth_limit = switch_deco; |
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904 return 1; |
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905 } |
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906 else |
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907 return 0; |
217 | 908 } |
909 | |
241 | 910 sim_gas_delay = 0; |
911 return 0; | |
217 | 912 } |
913 | |
914 ////////////////////////////////////////////////////////////////////////////// | |
915 // Calculate gas switches | |
916 // | |
917 // | |
918 // Input: N2_ratio, He_ratio. | |
919 // sim_gas_last_used | |
920 // | |
921 // Output: calc_N2_ratio, calc_He_ratio | |
922 // | |
241 | 923 static void gas_switch_set(void) |
217 | 924 { |
564 | 925 assert( sim_gas_last_used <= NUM_GAS ); |
217 | 926 |
388 | 927 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. |
224 | 928 { |
929 calc_N2_ratio = N2_ratio; | |
930 calc_He_ratio = He_ratio; | |
931 } | |
932 else | |
933 { | |
934 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
935 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
217 | 936 } |
201 | 937 |
938 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
939 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
940 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
941 } | |
942 | |
943 ////////////////////////////////////////////////////////////////////////////// | |
944 // | |
212 | 945 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
509 | 946 // temp_deco : simulated respiration pressure |
276 | 947 // float_deco_distance : security factor. |
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948 // Water-vapor pressure inside limbs (ppWater). |
212 | 949 // |
236 | 950 // Output: ppN2, ppHe. |
212 | 951 // |
952 static void sim_alveolar_presures(void) | |
201 | 953 { |
212 | 954 overlay float deco_diluent = temp_deco; // new in v.101 |
955 | |
276 | 956 // Take deco offset into account, but not at surface. |
957 // Note: this should be done on ambiant pressure, hence before | |
958 // computing the diluant partial pressure... | |
959 if( deco_diluent > pres_surface ) | |
960 deco_diluent += float_deco_distance; | |
961 | |
212 | 962 //---- CCR mode : deco gas switch ? -------------------------------------- |
276 | 963 if( char_I_const_ppO2 != 0 ) |
201 | 964 { |
276 | 965 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
966 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
310
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967 // ppWater in the equations below: |
321 | 968 deco_diluent -= const_ppO2; |
276 | 969 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
212 | 970 |
971 if (deco_diluent > temp_deco) | |
972 deco_diluent = temp_deco; | |
201 | 973 } |
974 | |
310
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975 if( deco_diluent > ppWater ) |
201 | 976 { |
310
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977 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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978 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
201 | 979 } |
980 else | |
981 { | |
236 | 982 ppN2 = 0.0; |
201 | 983 ppHe = 0.0; |
984 } | |
236 | 985 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
201 | 986 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
987 } | |
988 | |
989 ////////////////////////////////////////////////////////////////////////////// | |
167 | 990 // clear_tissue |
991 // | |
165 | 992 // optimized in v.101 (var_N2_a) |
167 | 993 // |
994 // preload tissues with standard pressure for the given ambient pressure. | |
995 // Note: fixed N2_ratio for standard air. | |
201 | 996 // |
167 | 997 static void clear_tissue(void) |
116 | 998 { |
511
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999 overlay float p; |
116 | 1000 flag_in_divemode = 0; |
1001 | |
167 | 1002 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
1003 N2_ratio = 0.7902; | |
212 | 1004 pres_respiration = int_I_pres_respiration * 0.001; |
164 | 1005 |
511
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1006 p = N2_ratio * (pres_respiration - ppWater); |
338 | 1007 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1008 { |
511
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1009 // cycle through the 16 Bühlmann N2 tissues |
339 | 1010 pres_tissue_N2[ci] = p; |
197 | 1011 |
1012 // cycle through the 16 Bühlmann tissues for Helium | |
339 | 1013 pres_tissue_He[ci] = 0.0; |
511
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1014 } |
116 | 1015 |
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1016 clear_deco_table(); |
126 | 1017 char_O_deco_status = 0; |
1018 char_O_nullzeit = 0; | |
168 | 1019 int_O_ascenttime = 0; |
126 | 1020 char_O_gradient_factor = 0; |
1021 char_O_relative_gradient_GF = 0; | |
258 | 1022 |
1023 calc_lead_tissue_limit = 0.0; | |
1024 char_O_gtissue_no = 0; | |
167 | 1025 } |
116 | 1026 |
167 | 1027 ////////////////////////////////////////////////////////////////////////////// |
1028 // calc_hauptroutine | |
1029 // | |
1030 // this is the major code in dive mode calculates: | |
116 | 1031 // the tissues, |
167 | 1032 // the bottom time, |
1033 // and simulates the ascend with all deco stops. | |
171 | 1034 // |
1035 // The deco_state sequence is : | |
1036 // 3 (at surface) | |
1037 // +---> 0 : calc nullzeit | |
1038 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
1039 // | +-> 1 : simulate up to 16min of stops. | |
1040 // | +------< not finished | |
1041 // +--------< finish | |
1042 // | |
312
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1043 // Added steps 6,5 for @+5 calculation: |
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1044 // 6 = ascent to first stop (same as 2), except continue to 7 |
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1045 // 7 = same as 1, except loop to 7. |
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1046 // |
167 | 1047 static void calc_hauptroutine(void) |
116 | 1048 { |
241 | 1049 static unsigned char backup_gas_used = 0; |
1050 static unsigned char backup_gas_depth = 0; | |
217 | 1051 static unsigned char backup_gas_delay = 0; |
186 | 1052 |
116 | 1053 calc_hauptroutine_data_input(); |
1054 | |
1055 calc_hauptroutine_update_tissues(); | |
1056 calc_gradient_factor(); | |
1057 | |
167 | 1058 // toggle between calculation for nullzeit (bottom time), |
1059 // deco stops | |
1060 // and more deco stops (continue) | |
697 | 1061 switch( char_O_deco_status ) |
116 | 1062 { |
186 | 1063 case 3: //---- At surface: start a new dive ------------------------------ |
1064 clear_deco_table(); | |
1065 copy_deco_table(); | |
200 | 1066 int_O_ascenttime = 0; // Reset DTR. |
323 | 1067 int_O_extra_ascenttime = 0; |
200 | 1068 char_O_nullzeit = 0; // Reset bottom time. |
278 | 1069 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
201 | 1070 |
217 | 1071 // Values that should be reset just once for the full real dive. |
1072 // This is used to record the lowest stop for the whole dive, | |
1073 // Including ACCROSS all simulated ascent. | |
695 | 1074 low_depth = 0.0; |
567 | 1075 locked_GF_step = 0.0; |
217 | 1076 |
1077 // Reset gas switch history. | |
241 | 1078 backup_gas_used = sim_gas_last_used = 0; |
1079 backup_gas_depth = sim_gas_last_depth = 0; | |
217 | 1080 backup_gas_delay = sim_gas_delay = 0; |
203 | 1081 sim_dive_mins = 0; |
1082 break; | |
186 | 1083 |
167 | 1084 case 0: //---- bottom time ----------------------------------------------- |
312
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1085 default: |
509 | 1086 gas_switch_find_current(); // Lookup for current gas & time. |
1087 gas_switch_set(); // setup calc_ratio's | |
1088 | |
167 | 1089 calc_nullzeit(); |
534
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1090 if( char_O_nullzeit > 0 ) // Some NDL time left ? |
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1091 { |
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1092 char_O_deco_status = 0; // YES: recalc ndl next time. |
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1093 clear_deco_table(); // Also clear stops ! |
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1094 copy_deco_table(); |
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1095 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) |
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1096 } |
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1097 else |
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1098 char_O_deco_status = 2; // NO: calc ascent next time. |
186 | 1099 break; |
1100 | |
1101 case 2: //---- Simulate ascent to first stop ----------------------------- | |
312
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1102 case 6: // @+5min variation |
203 | 1103 // Check proposed gas at begin of ascent simulation |
247
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1104 sim_dive_mins = int_I_divemins; // Init current time. |
241 | 1105 |
532 | 1106 gas_switch_find_current(); // Lookup for current gas & time. |
1107 gas_switch_set(); // setup calc_ratio's | |
1108 | |
247
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1109 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1110 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
203 | 1111 backup_gas_delay = sim_gas_delay; |
186 | 1112 |
1113 sim_ascent_to_first_stop(); | |
201 | 1114 |
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1115 // Calc stops next time (deco or gas switch). |
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1116 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
167 | 1117 break; |
169
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1118 |
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1119 case 1: //---- Simulate stops -------------------------------------------- |
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1120 case 5: // @+5 variation. |
167 | 1121 calc_hauptroutine_calc_deco(); |
186 | 1122 |
1123 // If simulation is finished, restore the GF low reference, so that | |
1124 // next ascent simulation is done from the current depth: | |
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1125 if( (char_O_deco_status & 3) == 0 ) |
186 | 1126 { |
241 | 1127 sim_gas_last_used = backup_gas_used; |
1128 sim_gas_last_depth = backup_gas_depth; | |
247
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1129 sim_gas_delay = backup_gas_delay; |
186 | 1130 } |
167 | 1131 break; |
116 | 1132 } |
167 | 1133 |
116 | 1134 } |
1135 | |
167 | 1136 ////////////////////////////////////////////////////////////////////////////// |
1137 // calc_hauptroutine_data_input | |
1138 // | |
1139 // Reset all C-code dive parameters from their ASM-code values. | |
1140 // Detect gas change condition. | |
1141 // | |
116 | 1142 void calc_hauptroutine_data_input(void) |
1143 { | |
203 | 1144 overlay short int_temp; |
511
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1145 overlay unsigned char g; |
126 | 1146 |
197 | 1147 pres_respiration = int_I_pres_respiration * 0.001; |
1148 pres_surface = int_I_pres_surface * 0.001; | |
1149 N2_ratio = char_I_N2_ratio * 0.01; | |
1150 He_ratio = char_I_He_ratio * 0.01; | |
1151 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
116 | 1152 |
126 | 1153 // ____________________________________________________ |
1154 // | |
1155 // _____________ G A S _ C H A N G E S ________________ | |
1156 // ____________________________________________________ | |
1157 | |
212 | 1158 // Keep a margin of 150mbar = 1.50m |
1159 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
1160 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
126 | 1161 |
203 | 1162 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
511
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1163 for(g=0; g < NUM_GAS; ++g) |
126 | 1164 { |
511
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1165 deco_gas_change[g] = 0; |
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1166 if(char_I_deco_gas_change[g]) |
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1167 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) |
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1168 deco_gas_change[g] = char_I_deco_gas_change[g]; |
126 | 1169 } |
116 | 1170 |
197 | 1171 const_ppO2 = char_I_const_ppO2 * 0.01; |
1172 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
1173 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
1174 GF_low = char_I_GF_Low_percentage * 0.01; | |
1175 GF_high = char_I_GF_High_percentage * 0.01; | |
126 | 1176 GF_delta = GF_high - GF_low; |
116 | 1177 } |
1178 | |
167 | 1179 ////////////////////////////////////////////////////////////////////////////// |
171 | 1180 // |
1181 // | |
116 | 1182 void calc_hauptroutine_update_tissues(void) |
1183 { | |
197 | 1184 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
1185 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
1186 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
237 | 1187 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
197 | 1188 |
276 | 1189 pres_diluent = pres_respiration; |
307 | 1190 if( char_I_const_ppO2 != 0 ) // new in v.101 |
186 | 1191 { |
322 | 1192 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
1193 | |
276 | 1194 pres_diluent -= const_ppO2; // new in v.101 |
1195 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
321 | 1196 if( pres_diluent < 0.0 ) |
1197 pres_diluent = 0.0; | |
276 | 1198 if( pres_diluent > pres_respiration ) // new in v.101 |
1199 pres_diluent = pres_respiration; // new in v.101 | |
307 | 1200 |
321 | 1201 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
322 | 1202 |
326 | 1203 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
322 | 1204 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
1205 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
186 | 1206 } |
307 | 1207 |
310
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1208 if( pres_diluent > ppWater ) // new in v.101 |
116 | 1209 { |
307 | 1210 overlay float EAD, END; |
1211 | |
310
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1212 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1213 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
307 | 1214 |
1215 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
1216 // with plain air. | |
310
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1217 // ppN2 = 79% * (P_EAD - ppWater) |
307 | 1218 // EAD = (P_EAD - Psurface) * 10 |
310
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1219 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
317 | 1220 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
307 | 1221 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
317 | 1222 char_O_EAD = (unsigned char)(EAD + 0.5); |
307 | 1223 |
1224 // END : Equivalent Narcotic Dive. | |
1225 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
1226 // 0.23 btw). Hence the formula becomes: | |
310
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1227 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
317 | 1228 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
307 | 1229 // |
1230 // Source cited: | |
1231 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
1232 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
317 | 1233 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
307 | 1234 if( END < 0.0 || END > 245.5 ) END = 0.0; |
317 | 1235 char_O_END = (unsigned char)(END + 0.5); |
116 | 1236 } |
167 | 1237 else // new in v.101 |
116 | 1238 { |
236 | 1239 ppN2 = 0.0; // new in v.101 |
200 | 1240 ppHe = 0.0; // new in v.101 |
307 | 1241 char_O_EAD = char_O_END = 0; |
116 | 1242 } |
1243 | |
1244 if(!char_I_step_is_1min) | |
192 | 1245 calc_tissue(0); |
116 | 1246 else |
192 | 1247 calc_tissue(1); |
186 | 1248 |
192 | 1249 // Calc limit for surface, ie. GF_high. |
258 | 1250 calc_limit(); |
186 | 1251 |
203 | 1252 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
339 | 1253 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
171 | 1254 } |
1255 | |
116 | 1256 |
167 | 1257 ////////////////////////////////////////////////////////////////////////////// |
169
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1258 // Compute stops. |
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1259 // |
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1260 // Note: because this can be very long, break on 16 iterations, and set state |
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1261 // to 0 when finished, or to 1 when needing to continue. |
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1262 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
257
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1263 // break the loop when total time > 512msec. |
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1264 // |
116 | 1265 void calc_hauptroutine_calc_deco(void) |
1266 { | |
169
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1267 overlay unsigned char loop; |
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1268 |
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1269 for(loop = 0; loop < 16; ++loop) |
116 | 1270 { |
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1271 // Limit loops to 512ms, using the RTC timer 3: |
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1272 if( tmr3() & (512*32) ) |
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1273 break; |
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1274 |
241 | 1275 // Do not ascent while doing a gas switch ? |
203 | 1276 if( sim_gas_delay <= sim_dive_mins ) |
1277 { | |
241 | 1278 if( calc_nextdecodepth() ) |
1279 { | |
1280 if( temp_depth_limit == 0 ) | |
1281 goto Surface; | |
116 | 1282 |
241 | 1283 //---- We hit a stop at temp_depth_limit --------------------- |
317 | 1284 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
241 | 1285 + pres_surface; // To absolute. |
471 | 1286 if( !update_deco_table() ) // Adds a one minute stops. |
1287 goto Surface; // Deco table full: abort... | |
241 | 1288 } |
1289 else | |
1290 { | |
1291 //---- No stop ----------------------------------------------- | |
317 | 1292 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
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1293 |
241 | 1294 //---- Finish computations once surface is reached ----------- |
1295 if( temp_deco <= pres_surface ) | |
1296 { | |
1297 Surface: | |
471 | 1298 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
312
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1299 copy_deco_table(); |
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1300 |
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1301 calc_ascenttime(); |
471 | 1302 char_O_deco_status = 0; // calc nullzeit next time. |
1303 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
241 | 1304 return; |
1305 } | |
1306 } | |
212 | 1307 } |
1308 else | |
334
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1309 { |
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1310 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1311 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
471 | 1312 if( !update_deco_table() ) // Just pass one minute. |
1313 goto Surface; // Deco table full: abort... | |
334
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1314 } |
197 | 1315 |
241 | 1316 //---- Then update tissue -------------------------------------------- |
203 | 1317 sim_dive_mins++; // Advance simulated time by 1 minute. |
241 | 1318 gas_switch_set(); // Apply any simulated gas change, once validated. |
212 | 1319 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
192 | 1320 sim_tissue(1); // Simulate compartiments for 1 minute. |
116 | 1321 } |
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1322 |
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1323 // Surface not reached, need more stops... for menu animation. |
278 | 1324 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
116 | 1325 } |
1326 | |
167 | 1327 ////////////////////////////////////////////////////////////////////////////// |
169
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1328 // Simulation ascention to first deco stop. |
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1329 // |
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1330 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1331 // there is no need to break on more that 16 iterations |
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1332 // (or we are already in deep shit). |
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1333 // |
334
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1334 // Input: pres_respiration |
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1335 // Output: temp_deco |
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1336 // |
312
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1337 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1338 // before ascent. |
169
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1339 void sim_ascent_to_first_stop(void) |
116 | 1340 { |
698 | 1341 overlay unsigned char fast = 1; // 1min or 2sec steps. |
1342 | |
171 | 1343 update_startvalues(); |
169
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1344 clear_deco_table(); |
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1345 |
200 | 1346 temp_deco = pres_respiration; // Starts from current real depth. |
169
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1347 |
312
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1348 // Are we doing the special @+5min variation ? |
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1349 if(char_O_deco_status & 4) |
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1350 sim_extra_time(); |
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1351 |
212 | 1352 // Do we have a gas switch going on ? |
1353 if( sim_gas_delay > sim_dive_mins ) | |
1354 return; | |
1355 | |
241 | 1356 //---- Loop until first stop, gas switch, or surface is reached ---------- |
169
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1357 for(;;) |
116 | 1358 { |
461 | 1359 overlay float old_deco = temp_deco; // Pamb backup (bars) |
460 | 1360 |
698 | 1361 // Try ascending 1 full minute (fast) or 2sec (!fast): |
1362 if( fast ) | |
1363 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. | |
1364 else | |
1365 temp_deco -= (10.0/30.0)*METER_TO_BAR; // 2sec at 10m/min. | |
1366 | |
461 | 1367 if( temp_deco < pres_surface ) // But don't go over surface. |
1368 temp_deco = pres_surface; | |
203 | 1369 |
461 | 1370 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because |
1371 // one minute passed. | |
212 | 1372 sim_limit(GF_low); |
1373 | |
1374 // Did we reach deepest remaining stop ? | |
241 | 1375 if( temp_deco < sim_lead_tissue_limit ) |
212 | 1376 { |
461 | 1377 temp_deco = old_deco; // Restore last correct depth, |
698 | 1378 |
1379 if( fast ) | |
1380 { | |
1381 fast = 0; // Retry with 2sec steps. | |
1382 continue; | |
1383 } | |
1384 else | |
1385 break; // Done... | |
212 | 1386 } |
1387 | |
203 | 1388 // Did we reach surface ? |
460 | 1389 // NOTE: we should round BEFORE checking surface is reached. |
461 | 1390 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
1391 if( temp_depth_limit == 0 ) | |
203 | 1392 { |
1393 temp_deco = pres_surface; // Yes: finished ! | |
1394 break; | |
1395 } | |
169
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1396 |
241 | 1397 // Check for gas change below new depth ? |
1398 if( gas_switch_deepest() ) | |
1399 { | |
334
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1400 assert( temp_depth_limit > 0); |
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1401 |
317 | 1402 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
212 | 1403 break; |
241 | 1404 } |
171 | 1405 |
698 | 1406 if( fast ) |
1407 sim_dive_mins++; // Advance simulated time by 1 minute. | |
241 | 1408 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
698 | 1409 sim_tissue(fast); // and update tissues for 1 min. |
203 | 1410 } |
167 | 1411 } |
116 | 1412 |
167 | 1413 ////////////////////////////////////////////////////////////////////////////// |
312
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1414 // Simulation extra time at the current depth. |
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1415 // |
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1416 // This routine is used for @+5min feature. |
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1417 void sim_extra_time(void) |
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1418 { |
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1419 overlay unsigned char extra = read_custom_function(58); |
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1420 do { |
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1421 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1422 sim_tissue(1); // and update tissues for 1 min. |
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1423 } while( --extra != 0 ); |
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1424 } |
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1425 |
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1426 ////////////////////////////////////////////////////////////////////////////// |
167 | 1427 // calc_tissue |
1428 // | |
116 | 1429 // optimized in v.101 |
167 | 1430 // |
184 | 1431 static void calc_tissue(PARAMETER unsigned char period) |
116 | 1432 { |
251 | 1433 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1434 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1435 |
338 | 1436 for (ci=0;ci<NUM_COMP;ci++) |
126 | 1437 { |
258 | 1438 read_buhlmann_times(period); // 2 sec or 1 min period. |
116 | 1439 |
126 | 1440 // N2 |
339 | 1441 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
126 | 1442 temp_tissue_safety(); |
339 | 1443 pres_tissue_N2[ci] += temp_tissue; |
165 | 1444 |
126 | 1445 // He |
339 | 1446 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
126 | 1447 temp_tissue_safety(); |
339 | 1448 pres_tissue_He[ci] += temp_tissue; |
192 | 1449 } |
167 | 1450 } |
116 | 1451 |
167 | 1452 ////////////////////////////////////////////////////////////////////////////// |
192 | 1453 // calc_limit |
167 | 1454 // |
192 | 1455 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
167 | 1456 // |
258 | 1457 static void calc_limit(void) |
167 | 1458 { |
192 | 1459 char_O_gtissue_no = 255; |
1460 calc_lead_tissue_limit = 0.0; | |
1461 | |
338 | 1462 for(ci=0; ci<NUM_COMP;ci++) |
192 | 1463 { |
339 | 1464 overlay float N2 = pres_tissue_N2[ci]; |
1465 overlay float He = pres_tissue_He[ci]; | |
293
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1466 overlay float p = N2 + He; |
192 | 1467 |
258 | 1468 read_buhlmann_coefficients(); |
293
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1469 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1470 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
116 | 1471 |
192 | 1472 // Apply the Eric Baker's varying gradient factor correction. |
1473 // Note: the correction factor depends both on GF and b, | |
1474 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1475 // so that can change who is the leading gas... | |
1476 // Note: Also depends of the GF. So the calcul is different for | |
1477 // GF_low, current GF, or GF_high... | |
1478 // *BUT* calc_tissue() is used to compute bottom time, | |
1479 // hence what would happend at surface, | |
1480 // hence at GF_high. | |
509 | 1481 if( char_I_deco_model != 0 ) |
258 | 1482 p = ( p - var_N2_a * GF_high) * var_N2_b |
1483 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
192 | 1484 else |
1485 p = (p - var_N2_a) * var_N2_b; | |
258 | 1486 if( p < 0.0 ) p = 0.0; |
192 | 1487 |
1488 if( p > calc_lead_tissue_limit ) | |
1489 { | |
1490 char_O_gtissue_no = ci; | |
1491 calc_lead_tissue_limit = p; | |
1492 } | |
1493 } | |
197 | 1494 |
338 | 1495 assert( char_O_gtissue_no < NUM_COMP ); |
197 | 1496 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
167 | 1497 } |
1498 | |
1499 ////////////////////////////////////////////////////////////////////////////// | |
1500 // calc_nullzeit | |
1501 // | |
1502 // calculates the remaining bottom time | |
1503 // | |
511
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1504 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second |
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1505 // exponential term to the M-value equation, making it impossible to |
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1506 // invert... So we have to make a fast-simu until we find a better way. |
509 | 1507 // |
1508 // Input: pres_respiration | |
1509 // Output: char_O_nullzeit | |
167 | 1510 // |
1511 static void calc_nullzeit(void) | |
1512 { | |
511
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1513 //---- Compute ppN2 and ppHe --------------------------------------------- |
509 | 1514 temp_deco = pres_respiration; |
1515 sim_alveolar_presures(); | |
167 | 1516 |
509 | 1517 char_O_nullzeit = 240; |
1518 for(ci=0; ci<NUM_COMP; ci++) | |
1519 { | |
511
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1520 //---- Read A/B values and loading factor for N2 and He -------------- |
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1521 overlay float tN2 = pres_tissue_N2[ci]; |
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1522 overlay float tHe = pres_tissue_He[ci]; |
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1523 overlay float t = tN2 + tHe; |
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1524 overlay unsigned char ndl; |
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1525 overlay unsigned char period = 10; |
192 | 1526 |
509 | 1527 read_buhlmann_coefficients(); |
511
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1528 read_buhlmann_times(2); // Starts with a 10min period. |
509 | 1529 |
511
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1530 //---- Simulate for that tissue -------------------------------------- |
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1531 // NOTE: No need to simulate for longuer than the already found NDL. |
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1532 for(ndl=0; ndl<char_O_nullzeit;) |
509 | 1533 { |
511
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1534 //---- Compute updated mix M-value at surface |
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1535 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; |
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1536 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; |
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1537 overlay float M0 = (a + pres_surface/b); |
116 | 1538 |
511
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1539 //---- Add 10min/1min to N2/He tissues |
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1540 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; |
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1541 overlay float dTHe = (ppHe - tHe) * var_He_e; |
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1542 |
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1543 //---- Apply security margin when using the non-GF model |
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1544 if( char_I_deco_model == 0 ) |
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1545 { |
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1546 dTN2 *= float_saturation_multiplier; |
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1547 dTHe *= float_saturation_multiplier; |
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1548 } |
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1549 else // Or GF-based model |
509 | 1550 M0 = GF_high * (M0 - pres_surface) + pres_surface; |
167 | 1551 |
511
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1552 //---- Simulate off-gasing while going to surface |
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1553 // TODO ! |
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1554 // dTN2 -= exp( ... ascent time ... ppN2...) |
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1555 // dTHe -= exp( ... ascent time ... ppHe...) |
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1556 |
534
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1557 //---- Ok now, and still ok to surface after 1 or 10 minutes ? |
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1558 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) |
509 | 1559 { |
511
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1560 tN2 += dTN2; // YES: apply gas loadings, |
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1561 tHe += dTHe; |
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1562 t = tN2 + tHe; |
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1563 ndl += period; // increment NDL, |
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1564 continue; // and loop. |
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1565 } |
116 | 1566 |
511
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1567 //---- Should we retry with smaller steps ? |
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1568 if( period == 10 ) |
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1569 { |
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1570 read_buhlmann_times(1); // 1min coefs. |
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1571 period = 1; |
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1572 continue; |
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1573 } |
167 | 1574 |
511
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1575 //---- ELSE make a linear approx for the last minute |
524 | 1576 // Usefull to have a meaningfull rounding of NDL. |
1577 // But ONLY it positive (negativ casted to unsigned is bad). | |
1578 if( M0 > t ) | |
1579 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
511
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1580 break; |
509 | 1581 } |
511
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1582 |
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1583 // Keep the shortest NDL found |
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1584 if( ndl < char_O_nullzeit ) |
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1585 char_O_nullzeit = ndl; |
339 | 1586 } |
167 | 1587 } |
116 | 1588 |
167 | 1589 ////////////////////////////////////////////////////////////////////////////// |
1590 // calc_ascenttime | |
1591 // | |
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1592 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1593 // and all stops. |
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1594 // |
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1595 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
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1596 static void calc_ascenttime(void) |
116 | 1597 { |
323 | 1598 overlay unsigned char x; |
1599 overlay unsigned short sum; | |
168 | 1600 |
323 | 1601 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
1602 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
1603 if (ascent < 0.0) | |
1604 ascent = 0.0; | |
1605 sum = (unsigned short)(ascent + 0.99); | |
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1606 |
338 | 1607 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
323 | 1608 sum += (unsigned short)internal_deco_time[x]; |
1609 | |
1610 if( char_O_deco_status == 1 ) | |
1611 int_O_ascenttime = sum; | |
126 | 1612 else |
323 | 1613 int_O_extra_ascenttime = sum; |
167 | 1614 } |
116 | 1615 |
167 | 1616 ////////////////////////////////////////////////////////////////////////////// |
1617 // update_startvalues | |
1618 // | |
116 | 1619 // updated in v.102 |
167 | 1620 // |
116 | 1621 void update_startvalues(void) |
1622 { | |
167 | 1623 overlay unsigned char x; |
116 | 1624 |
201 | 1625 // Start ascent simulation with current tissue partial pressures. |
339 | 1626 for(x=0; x<NUM_COMP; x++) |
116 | 1627 { |
339 | 1628 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
1629 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
116 | 1630 } |
197 | 1631 |
201 | 1632 // No leading tissue (yet) for this ascent simulation. |
197 | 1633 sim_lead_tissue_limit = 0.0; |
1634 sim_lead_tissue_no = 255; | |
167 | 1635 } |
116 | 1636 |
167 | 1637 ////////////////////////////////////////////////////////////////////////////// |
192 | 1638 // sim_tissue |
167 | 1639 // |
116 | 1640 // optimized in v.101 |
167 | 1641 // |
1642 // Function very simular to calc_tissue, but: | |
1643 // + Use a 1min or 10min period. | |
1644 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
184 | 1645 static void sim_tissue(PARAMETER unsigned char period) |
116 | 1646 { |
251 | 1647 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1648 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1649 |
338 | 1650 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1651 { |
258 | 1652 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
165 | 1653 |
126 | 1654 // N2 |
339 | 1655 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
126 | 1656 temp_tissue_safety(); |
339 | 1657 sim_pres_tissue_N2[ci] += temp_tissue; |
126 | 1658 |
1659 // He | |
339 | 1660 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
126 | 1661 temp_tissue_safety(); |
339 | 1662 sim_pres_tissue_He[ci] += temp_tissue; |
192 | 1663 } |
167 | 1664 } |
116 | 1665 |
167 | 1666 ////////////////////////////////////////////////////////////////////////////// |
192 | 1667 // sim_limit() |
1668 // | |
1669 // New in v.111 | |
1670 // | |
1671 // Function separated from sim_tissue() to allow recomputing limit on | |
1672 // different depth, because it depends on current gradient factor. | |
167 | 1673 // |
192 | 1674 static void sim_limit(PARAMETER float GF_current) |
116 | 1675 { |
212 | 1676 assert( 0.0 < GF_current && GF_current <= 1.0f); |
1677 | |
192 | 1678 sim_lead_tissue_limit = 0.0; |
212 | 1679 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
192 | 1680 |
338 | 1681 for(ci=0; ci<NUM_COMP; ci++) |
192 | 1682 { |
339 | 1683 overlay float N2 = sim_pres_tissue_N2[ci]; |
1684 overlay float He = sim_pres_tissue_He[ci]; | |
241 | 1685 overlay float p = N2 + He; |
192 | 1686 |
258 | 1687 read_buhlmann_coefficients(); |
241 | 1688 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
1689 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
192 | 1690 |
1691 // Apply the Eric Baker's varying gradient factor correction. | |
1692 // Note: the correction factor depends both on GF and b, | |
1693 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1694 // so that can change who is the leading gas... | |
1695 // Note: Also depends of the GF_current... | |
509 | 1696 if( char_I_deco_model != 0 ) |
302 | 1697 p = ( p - var_N2_a * GF_current) |
1698 / (GF_current / var_N2_b + 1.0 - GF_current); | |
192 | 1699 else |
1700 p = (p - var_N2_a) * var_N2_b; | |
1701 | |
1702 if( p > sim_lead_tissue_limit ) | |
1703 { | |
1704 sim_lead_tissue_no = ci; | |
1705 sim_lead_tissue_limit = p; | |
1706 } | |
1707 } // for ci | |
197 | 1708 |
338 | 1709 assert( sim_lead_tissue_no < NUM_COMP ); |
237 | 1710 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
167 | 1711 } |
116 | 1712 |
167 | 1713 ////////////////////////////////////////////////////////////////////////////// |
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1714 // clear_deco_table |
167 | 1715 // |
1716 // unchanged in v.101 | |
1717 // | |
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1718 static void clear_deco_table(void) |
116 | 1719 { |
169
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1720 overlay unsigned char x; |
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1721 |
338 | 1722 for(x=0; x<NUM_STOPS; ++x) |
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1723 { |
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1724 internal_deco_time [x] = 0; |
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1725 internal_deco_depth[x] = 0; |
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1726 } |
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1727 } |
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1728 |
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1729 ////////////////////////////////////////////////////////////////////////////// |
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1730 // update_deco_table |
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1731 // |
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1732 // Add 1 min to current stop. |
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1733 // |
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1734 // Inputs: |
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1735 // temp_depth_limit = stop's depth, in meters. |
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1736 // In/Out: |
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1737 // internal_deco_depth[] : depth (in metres) of each stops. |
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1738 // internal_deco_time [] : time (in minutes) of each stops. |
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1739 // |
471 | 1740 static unsigned char update_deco_table() |
169
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1741 { |
192 | 1742 overlay unsigned char x; |
247
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1743 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1744 assert( temp_depth_limit > 0 ); // No stop at surface... |
169
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1745 |
338 | 1746 for(x=0; x<NUM_STOPS; ++x) |
192 | 1747 { |
212 | 1748 // Make sure deco-stops are recorded in order: |
334
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1749 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
212 | 1750 |
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1751 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
192 | 1752 { |
1753 // Do not overflow (max 255') | |
1754 if( internal_deco_time[x] < 255 ) | |
1755 { | |
1756 internal_deco_time[x]++; | |
471 | 1757 return 1; |
192 | 1758 } |
1759 // But store extra in the next stop... | |
169
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1760 } |
192 | 1761 |
169
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1762 if( internal_deco_depth[x] == 0 ) |
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1763 { |
192 | 1764 internal_deco_depth[x] = temp_depth_limit; |
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1765 if( sim_gas_delay >= sim_dive_mins ) |
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1766 internal_deco_depth[x] |= 0x80; |
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1767 |
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1768 internal_deco_time[x] = 1; |
471 | 1769 return 1; |
169
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1770 } |
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1771 } |
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1772 |
192 | 1773 // Can't store stops at more than 96m. |
1774 // Or stops at less that 3m too. | |
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1775 // Just do nothing with that... |
471 | 1776 return 0; |
167 | 1777 } |
116 | 1778 |
167 | 1779 ////////////////////////////////////////////////////////////////////////////// |
1780 // calc_gradient_factor | |
1781 // | |
165 | 1782 // optimized in v.101 (var_N2_a) |
116 | 1783 // new code in v.102 |
167 | 1784 // |
1785 static void calc_gradient_factor(void) | |
116 | 1786 { |
197 | 1787 overlay float gf; |
339 | 1788 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
1789 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
237 | 1790 |
338 | 1791 assert( char_O_gtissue_no < NUM_COMP ); |
237 | 1792 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
197 | 1793 |
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1794 // tissue > respiration (currently off-gasing) |
302 | 1795 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
1796 // GF = 100% when respiration == limit. | |
293
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1797 temp_tissue = N2 + He; |
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1798 if( temp_tissue <= pres_respiration ) |
197 | 1799 gf = 0.0; |
1800 else | |
1801 { | |
293
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1802 overlay float limit = calc_lead_tissue_limit; |
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1803 // NOTE: in GF model, calc_lead_tissue_limit include already the |
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1804 // correction due to gradient factor. To compute the actual |
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1805 // current GF, we need to (re-)compute the raw ambiant-pressure |
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1806 // limit from the Bühlmann model. |
509 | 1807 if( char_I_deco_model != 0 ) |
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1808 { |
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1809 ci = char_O_gtissue_no; |
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1810 read_buhlmann_coefficients(); |
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1811 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1812 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1813 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1814 } |
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1815 |
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1816 gf = (temp_tissue - pres_respiration) |
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1817 / (temp_tissue - limit) |
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1818 * 100.0; |
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1819 if( gf > 254.5 ) gf = 255.0; |
197 | 1820 if( gf < 0.0 ) gf = 0.0; |
1821 } | |
293
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1822 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
116 | 1823 |
509 | 1824 if( char_I_deco_model != 0 ) // calculate relative gradient factor |
116 | 1825 { |
197 | 1826 overlay float rgf; |
1827 | |
562 | 1828 if( low_depth < 3 ) |
197 | 1829 rgf = GF_high; |
1830 else | |
1831 { | |
317 | 1832 overlay float temp1 = low_depth * METER_TO_BAR; |
197 | 1833 overlay float temp2 = pres_respiration - pres_surface; |
186 | 1834 |
197 | 1835 if (temp2 <= 0) |
1836 rgf = GF_high; | |
1837 else if (temp2 >= temp1) | |
1838 rgf = GF_low; | |
1839 else | |
1840 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
1841 } | |
186 | 1842 |
197 | 1843 rgf = gf / rgf; // gf is already in percent |
1844 if( rgf < 0.0 ) rgf = 0.0; | |
293
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1845 if( rgf > 254.5 ) rgf = 255.0; |
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1846 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
116 | 1847 } // calc relative gradient factor |
1848 else | |
1849 { | |
186 | 1850 char_O_relative_gradient_GF = char_O_gradient_factor; |
116 | 1851 } |
167 | 1852 } |
116 | 1853 |
167 | 1854 ////////////////////////////////////////////////////////////////////////////// |
1855 // deco_calc_desaturation_time | |
1856 // | |
116 | 1857 // FIXED N2_ratio |
1858 // unchanged in v.101 | |
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1859 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
233 | 1860 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
167 | 1861 // |
116 | 1862 void deco_calc_desaturation_time(void) |
1863 { | |
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1864 RESET_C_STACK |
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1865 |
233 | 1866 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1867 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1868 | |
237 | 1869 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
233 | 1870 pres_surface = int_I_pres_surface * 0.001; |
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1871 ppN2 = N2_ratio * (pres_surface - ppWater); |
126 | 1872 int_O_desaturation_time = 0; |
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1873 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
233 | 1874 |
339 | 1875 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1876 { |
251 | 1877 overlay unsigned short desat_time; // For a particular compartiment, in min. |
1878 overlay float temp1; | |
1879 overlay float temp2; | |
1880 overlay float temp3; | |
1881 overlay float temp4; | |
338 | 1882 |
509 | 1883 read_buhlmann_ht(); |
338 | 1884 |
126 | 1885 // saturation_time (for flight) and N2_saturation in multiples of halftime |
1886 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
1887 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
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1888 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
126 | 1889 // N2 |
339 | 1890 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
1891 temp2 = ppN2 - pres_tissue_N2[ci]; | |
126 | 1892 if (temp2 >= 0.0) |
233 | 1893 temp1 = 0.0; |
126 | 1894 else |
1895 temp1 = temp1 / temp2; | |
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1896 |
251 | 1897 if( 0.0 < temp1 && temp1 < 1.0 ) |
126 | 1898 { |
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1899 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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1900 // minus because log is negative. |
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1901 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
509 | 1902 temp2 = var_N2_ht * temp1 / float_desaturation_multiplier; // time necessary (in minutes ) for complete desaturation (see comment about 5 percent) , new in v.101: float_desaturation_multiplier |
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1903 |
126 | 1904 } |
1905 else | |
1906 { | |
233 | 1907 temp1 = 0.0; |
1908 temp2 = 0.0; | |
126 | 1909 } |
116 | 1910 |
126 | 1911 // He |
339 | 1912 temp3 = 0.1 - pres_tissue_He[ci]; |
126 | 1913 if (temp3 >= 0.0) |
233 | 1914 temp3 = 0.0; |
126 | 1915 else |
339 | 1916 temp3 = - temp3 / pres_tissue_He[ci]; |
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1917 |
251 | 1918 if( 0.0 < temp3 && temp3 < 1.0 ) |
126 | 1919 { |
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1920 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
126 | 1921 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
1922 // minus because log is negative | |
509 | 1923 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
126 | 1924 } |
1925 else | |
1926 { | |
233 | 1927 temp3 = 0.0; |
1928 temp4 = 0.0; | |
126 | 1929 } |
116 | 1930 |
126 | 1931 // saturation_time (for flight) |
1932 if (temp4 > temp2) | |
203 | 1933 desat_time = (unsigned short)temp4; |
126 | 1934 else |
203 | 1935 desat_time = (unsigned short)temp2; |
252 | 1936 |
251 | 1937 if(desat_time > int_O_desaturation_time) |
1938 int_O_desaturation_time = desat_time; | |
116 | 1939 |
126 | 1940 // N2 saturation in multiples of halftime for display purposes |
339 | 1941 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1942 temp2 = temp2 + 80.0; // set center | |
126 | 1943 if (temp2 < 0.0) |
1944 temp2 = 0.0; | |
1945 if (temp2 > 255.0) | |
1946 temp2 = 255.0; | |
339 | 1947 char_O_tissue_N2_saturation[ci] = (char)temp2; |
233 | 1948 |
126 | 1949 // He saturation in multiples of halftime for display purposes |
339 | 1950 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1951 temp4 = temp4 + 80.0; // set center | |
126 | 1952 if (temp4 < 0.0) |
1953 temp4 = 0.0; | |
1954 if (temp4 > 255.0) | |
1955 temp4 = 255.0; | |
339 | 1956 char_O_tissue_He_saturation[ci] = (char)temp4; |
126 | 1957 } // for |
167 | 1958 } |
116 | 1959 |
167 | 1960 ////////////////////////////////////////////////////////////////////////////// |
1961 // calc_wo_deco_step_1_min | |
1962 // | |
116 | 1963 // FIXED N2 Ratio |
1964 // optimized in v.101 (...saturation_multiplier) | |
1965 // desaturation slowed down to 70,42% | |
167 | 1966 // |
1967 static void calc_wo_deco_step_1_min(void) | |
116 | 1968 { |
251 | 1969 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1970 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
1971 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
1972 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1973 | |
126 | 1974 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
368 | 1975 pres_respiration = pres_surface = int_I_pres_surface * 0.001; |
1976 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
200 | 1977 ppHe = 0.0; |
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1978 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
197 | 1979 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
126 | 1980 |
339 | 1981 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
167 | 1982 |
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1983 clear_deco_table(); |
200 | 1984 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
126 | 1985 char_O_nullzeit = 0; |
168 | 1986 int_O_ascenttime = 0; |
323 | 1987 int_O_extra_ascenttime = 0; |
126 | 1988 calc_gradient_factor(); |
167 | 1989 } |
126 | 1990 |
167 | 1991 ////////////////////////////////////////////////////////////////////////////// |
368 | 1992 // calc_dive_interval |
1993 // | |
1994 // Prepare tissue for delay before the next dive simulation. | |
1995 // | |
1996 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
1997 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
1998 // | |
1999 // Should be protected by deco_push_tissues_to_vault(), | |
2000 // deco_pull_tissues_from_vault() | |
2001 // | |
2002 // desaturation slowed down to 70,42%. | |
2003 // | |
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2004 static void calc_dive_interval(void) |
368 | 2005 { |
2006 overlay unsigned char t; | |
491
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2007 overlay unsigned char backup_model; |
368 | 2008 |
2009 //---- Initialize simulation parameters ---------------------------------- | |
2010 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
2011 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
2012 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
2013 ppHe = 0.0; | |
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2014 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
368 | 2015 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
2016 | |
568 | 2017 // Make sure SURFACE_DESAT_FACTOR is applied: |
491
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2018 backup_model = char_I_deco_model; |
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2019 char_I_deco_model = 0; |
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2020 |
368 | 2021 //---- Perform simulation ------------------------------------------------ |
2022 for(t=0; t<char_I_dive_interval; ++t) | |
2023 { | |
2024 calc_tissue(2); // period = 10min. | |
2025 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
2026 } | |
514 | 2027 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
2028 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); | |
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2029 |
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2030 //---- Restore model ----------------------------------------------------- |
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2031 char_I_deco_model = backup_model; |
368 | 2032 } |
2033 | |
2034 ////////////////////////////////////////////////////////////////////////////// | |
167 | 2035 ////////////////////////////////////////////////////////////////////////////// |
2036 ////////////////////////////////// deco_hash ///////////////////////////////// | |
2037 ////////////////////////////////////////////////////////////////////////////// | |
2038 ////////////////////////////////////////////////////////////////////////////// | |
126 | 2039 |
184 | 2040 #ifndef CROSS_COMPILE |
116 | 2041 void deco_hash(void) |
2042 { | |
167 | 2043 overlay unsigned char md_i, md_j; // Loop index. |
2044 overlay unsigned char md_t; | |
2045 overlay unsigned char md_buffer[16]; | |
2046 overlay unsigned char md_temp; | |
203 | 2047 overlay unsigned short md_pointer; |
167 | 2048 |
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2049 RESET_C_STACK |
126 | 2050 |
2051 // init | |
164 | 2052 for(md_i=0;md_i<16;md_i++) |
126 | 2053 { |
2054 md_state[md_i] = 0; | |
164 | 2055 char_O_hash[md_i] = 0; |
126 | 2056 } // for md_i 16 |
116 | 2057 |
126 | 2058 _asm |
167 | 2059 movlw 0x01 // md_pi address. |
2060 movwf TBLPTRU,0 | |
2061 movlw 0x7E | |
2062 movwf TBLPTRH,0 | |
2063 movlw 0x00 | |
2064 movwf TBLPTRL,0 | |
126 | 2065 _endasm; |
165 | 2066 md_i = 0; |
2067 do { | |
126 | 2068 _asm |
2069 TBLRDPOSTINC | |
2070 movff TABLAT,md_temp | |
2071 _endasm | |
165 | 2072 md_pi_subst[md_i++] = md_temp; |
2073 } while( md_i != 0 ); | |
2074 | |
126 | 2075 _asm |
167 | 2076 movlw 0x00 |
2077 movwf TBLPTRU,0 | |
2078 movlw 0x00 | |
2079 movwf TBLPTRH,0 | |
2080 movlw 0x00 | |
2081 movwf TBLPTRL,0 | |
126 | 2082 _endasm |
167 | 2083 |
126 | 2084 // cycle buffers |
2085 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
2086 { | |
2087 md_t = 0; | |
2088 for (md_i=0;md_i<16;md_i++) | |
2089 { | |
2090 if(md_pointer == 9) | |
164 | 2091 md_temp = char_O_hash[md_i]; |
126 | 2092 else |
2093 { | |
2094 _asm | |
167 | 2095 TBLRDPOSTINC |
2096 movff TABLAT,md_temp | |
126 | 2097 _endasm |
2098 } // else | |
167 | 2099 |
2100 md_buffer[md_i] = md_temp; | |
186 | 2101 md_state[md_i+16] = md_temp; |
2102 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
126 | 2103 } // for md_i 16 |
2104 | |
2105 for (md_i=0;md_i<18;md_i++) | |
2106 { | |
2107 for (md_j=0;md_j<48;md_j++) | |
2108 { | |
167 | 2109 md_state[md_j] ^= md_pi_subst[md_t]; |
126 | 2110 md_t = md_state[md_j]; |
2111 } // for md_j 48 | |
2112 md_t = (unsigned char)(md_t+1); | |
2113 } // for md_i 18 | |
164 | 2114 md_t = char_O_hash[15]; |
126 | 2115 |
2116 for (md_i=0;md_i<16;md_i++) | |
2117 { | |
167 | 2118 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
164 | 2119 md_t = char_O_hash[md_i]; |
126 | 2120 } // for md_i 16 |
2121 } // for md_pointer | |
116 | 2122 } // void deco_hash(void) |
184 | 2123 #endif |
116 | 2124 |
167 | 2125 ////////////////////////////////////////////////////////////////////////////// |
2126 // deco_clear_CNS_fraction | |
2127 // | |
116 | 2128 // new in v.101 |
167 | 2129 // |
116 | 2130 void deco_clear_CNS_fraction(void) |
2131 { | |
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2132 RESET_C_STACK |
237 | 2133 |
126 | 2134 CNS_fraction = 0.0; |
2135 char_O_CNS_fraction = 0; | |
167 | 2136 } |
116 | 2137 |
167 | 2138 ////////////////////////////////////////////////////////////////////////////// |
2139 // deco_calc_CNS_fraction | |
2140 // | |
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2141 // Input: char_I_actual_ppO2 : Current condition (in decibars). |
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2142 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. |
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2143 // CNS_fraction : velue before period. |
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2144 // Output: CNS_fraction, char_O_CNS_fraction |
167 | 2145 // |
116 | 2146 void deco_calc_CNS_fraction(void) |
2147 { | |
292 | 2148 overlay float time_factor = 1.0f; |
126 | 2149 RESET_C_STACK |
167 | 2150 |
471 | 2151 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2152 assert( char_I_actual_ppO2 > 15 ); |
2153 | |
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2154 if( char_I_step_is_1min == 1 ) |
292 | 2155 time_factor = 30.0f; |
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2156 else if( char_I_step_is_1min == 2 ) |
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2157 time_factor = 300.0f; |
116 | 2158 |
126 | 2159 if (char_I_actual_ppO2 < 50) |
292 | 2160 ; // no changes |
126 | 2161 else if (char_I_actual_ppO2 < 60) |
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2162 CNS_fraction += time_factor/(-540.0 * char_I_actual_ppO2 + 54000.0); |
126 | 2163 else if (char_I_actual_ppO2 < 70) |
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2164 CNS_fraction += time_factor/(-450.0 * char_I_actual_ppO2 + 48600.0); |
126 | 2165 else if (char_I_actual_ppO2 < 80) |
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2166 CNS_fraction += time_factor/(-360.0 * char_I_actual_ppO2 + 42300.0); |
126 | 2167 else if (char_I_actual_ppO2 < 90) |
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2168 CNS_fraction += time_factor/(-270.0 * char_I_actual_ppO2 + 35100.0); |
126 | 2169 else if (char_I_actual_ppO2 < 110) |
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2170 CNS_fraction += time_factor/(-180.0 * char_I_actual_ppO2 + 27000.0); |
126 | 2171 else if (char_I_actual_ppO2 < 150) |
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2172 CNS_fraction += time_factor/( -90.0 * char_I_actual_ppO2 + 17100.0); |
126 | 2173 else if (char_I_actual_ppO2 < 160) |
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2174 CNS_fraction += time_factor/(-225.0 * char_I_actual_ppO2 + 37350.0); |
126 | 2175 else if (char_I_actual_ppO2 < 165) |
292 | 2176 CNS_fraction += time_factor*0.000755; // Arieli et all.(2002): Modeling pulmonary and CNS O2 toxicity... Formula (A1) based on value for 1.55 and c=20 |
126 | 2177 else if (char_I_actual_ppO2 < 170) |
292 | 2178 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
126 | 2179 else if (char_I_actual_ppO2 < 175) |
292 | 2180 CNS_fraction += time_factor*0.00136; |
126 | 2181 else if (char_I_actual_ppO2 < 180) |
292 | 2182 CNS_fraction += time_factor*0.00180; |
126 | 2183 else if (char_I_actual_ppO2 < 185) |
292 | 2184 CNS_fraction += time_factor*0.00237; |
126 | 2185 else if (char_I_actual_ppO2 < 190) |
292 | 2186 CNS_fraction += time_factor*0.00310; |
126 | 2187 else if (char_I_actual_ppO2 < 195) |
292 | 2188 CNS_fraction += time_factor*0.00401; |
126 | 2189 else if (char_I_actual_ppO2 < 200) |
292 | 2190 CNS_fraction += time_factor*0.00517; |
126 | 2191 else if (char_I_actual_ppO2 < 230) |
292 | 2192 CNS_fraction += time_factor*0.0209; |
126 | 2193 else |
292 | 2194 CNS_fraction += time_factor*0.0482; // value for 2.5 |
116 | 2195 |
514 | 2196 if( CNS_fraction > 2.5 ) |
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2197 CNS_fraction = 2.55; |
514 | 2198 if( CNS_fraction < 0.0 ) |
126 | 2199 CNS_fraction = 0.0; |
2200 | |
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2201 char_O_CNS_fraction = (unsigned char)(100.0 * CNS_fraction + 0.5); |
167 | 2202 } |
116 | 2203 |
167 | 2204 ////////////////////////////////////////////////////////////////////////////// |
439
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2205 // deco_calc_CNS_planning |
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2206 // |
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2207 // Compute CNS during predicted ascent. |
488 | 2208 // |
2209 // Note: Needs a call to deco_push_tissues_to_vault(), | |
2210 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
2211 // | |
2212 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
2213 // Output: CNS_fraction, char_O_CNS_fraction | |
2214 // | |
439
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2215 void deco_calc_CNS_planning(void) |
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2216 { |
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2217 overlay unsigned char backup_gas_last_depth; |
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2218 overlay unsigned char backup_gas_last_used; |
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2219 overlay unsigned short backup_gas_delay; |
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2220 overlay unsigned short backup_dive_mins; |
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2221 overlay unsigned char backup_actual_ppO2; |
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2222 |
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2223 RESET_C_STACK |
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2224 |
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2225 // Backup state machine |
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2226 backup_gas_last_depth = sim_gas_last_depth; |
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2227 backup_gas_last_used = sim_gas_last_used; |
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2228 backup_gas_delay = sim_gas_delay; |
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2229 backup_dive_mins = sim_dive_mins; |
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2230 backup_actual_ppO2 = char_I_actual_ppO2; |
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2231 |
439
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2232 // Uses 1min CNS period: |
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2233 char_I_step_is_1min = 1; |
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2234 |
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2235 //---- Retrieve bottom Gas used, and set variables. |
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2236 sim_gas_last_used = char_I_first_gas; |
443
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2237 sim_gas_last_depth = 0; // Surface gas marker. |
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2238 gas_switch_set(); // Sets initial calc_N2/He_ratio |
439
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2239 |
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2240 //---- CCR mode : do the full TTS at once -------------------------------- |
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2241 if( char_I_const_ppO2 != 0 ) |
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2242 { |
443
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2243 overlay unsigned short t; // Needs 16bits here ! |
439
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2244 char_I_actual_ppO2 = char_I_const_ppO2; |
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2245 for(t=0; t<int_O_ascenttime; ++t) |
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2246 deco_calc_CNS_fraction(); |
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2247 } |
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2248 else //---- OC mode : have to follow all gas switches... ----------------- |
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2249 { |
443
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2250 overlay unsigned char i = 0; // Decostop loop counter |
439
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2251 overlay float actual_ppO2; |
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2252 overlay unsigned char time, t; |
563 | 2253 overlay unsigned char deepest_first = (read_custom_function(54) == 0); |
439
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2254 |
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2255 //---- Ascent to surface delay |
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2256 // NOTE: count as if time is spent with bottom pressure, |
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2257 // AND the bottom gas |
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2258 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) |
439
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2259 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2260 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2261 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2262 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2263 |
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|
2264 // Ascent time (rounded up): |
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|
2265 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); |
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2266 |
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2267 for(t=0; t<time; ++t) |
490
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2268 { |
439
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2269 deco_calc_CNS_fraction(); |
490
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|
2270 sim_dive_mins++; |
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2271 } |
439
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2272 |
563 | 2273 //---- Do all further stops ------------------------------------------ |
439
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2274 for(i=0; i<NUM_STOPS; ++i) |
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2275 { |
563 | 2276 overlay unsigned char switch_gas; |
2277 | |
2278 //---- Get next stop, possibly in reverse order ------------------ | |
2279 if( deepest_first ) | |
2280 { | |
2281 time = char_O_deco_time[i]; | |
2282 temp_depth_limit = char_O_deco_depth[i]; | |
2283 } | |
2284 else | |
2285 { | |
2286 time = char_O_deco_time[(NUM_STOPS-1)-i]; | |
2287 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i]; | |
2288 } | |
2289 if( time == 0 ) continue; | |
439
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2290 |
563 | 2291 //---- Gas Switch ? ---------------------------------------------- |
2292 switch_gas = temp_depth_limit & 0x80; // Switch flag. | |
2293 temp_depth_limit &= 0x7F; // True stop depth. | |
2294 | |
2295 if( switch_gas ) | |
2296 { | |
2297 gas_switch_deepest(); | |
2298 gas_switch_set(); | |
2299 } | |
2300 | |
2301 //---- Convert Depth and N2_ratio to ppO2 ------------------------ | |
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2302 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) |
439
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2303 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2304 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2305 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2306 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2307 |
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2308 //---- Apply the stop |
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2309 for(t=0; t<time; ++t) |
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2310 { |
439
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2311 deco_calc_CNS_fraction(); |
490
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2312 sim_dive_mins++; |
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2313 } |
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2314 } |
488 | 2315 } |
2316 | |
563 | 2317 //---- Back to normal mode... -------------------------------------------- |
488 | 2318 char_I_step_is_1min = 0; |
490
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2319 sim_gas_last_depth = backup_gas_last_depth; |
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2320 sim_gas_last_used = backup_gas_last_used; |
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2321 sim_gas_delay = backup_gas_delay; |
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2322 sim_dive_mins = backup_dive_mins; |
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|
2323 char_I_actual_ppO2 = backup_actual_ppO2; |
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2324 } |
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2325 |
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2326 ////////////////////////////////////////////////////////////////////////////// |
167 | 2327 // deco_calc_CNS_decrease_15min |
2328 // | |
116 | 2329 // new in v.101 |
167 | 2330 // |
116 | 2331 // calculates the half time of 90 minutes in 6 steps of 15 min |
200 | 2332 // (Used in sleepmode, for low battery mode). |
167 | 2333 // |
116 | 2334 // Output: char_O_CNS_fraction |
2335 // Uses and Updates: CNS_fraction | |
167 | 2336 // |
116 | 2337 void deco_calc_CNS_decrease_15min(void) |
2338 { | |
237 | 2339 RESET_C_STACK |
514 | 2340 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2341 |
126 | 2342 CNS_fraction = 0.890899 * CNS_fraction; |
514 | 2343 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
167 | 2344 } |
116 | 2345 |
167 | 2346 ////////////////////////////////////////////////////////////////////////////// |
2347 // deco_calc_percentage | |
2348 // | |
116 | 2349 // new in v.101 |
167 | 2350 // |
116 | 2351 // calculates int_I_temp * char_I_temp / 100 |
2352 // output is int_I_temp | |
200 | 2353 // |
2354 // Used to compute NoFly remaining time. | |
222
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2355 // |
116 | 2356 void deco_calc_percentage(void) |
2357 { | |
122
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2358 RESET_C_STACK |
222
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2359 |
237 | 2360 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
564 | 2361 assert( int_I_temp < 5760 ); // Less than 4 days = 96h... |
237 | 2362 |
222
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2363 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
237 | 2364 |
554
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2365 assert( int_I_temp < 5760 ); // Less than 96h too... |
222
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2366 } |
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2367 |
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2368 |
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2369 ////////////////////////////////////////////////////////////////////////////// |
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2370 // deco_gas_volumes |
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2371 // |
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2372 // new in v.111 |
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2373 // |
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2374 // calculates volumes for each gas. |
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2375 // |
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2376 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
240
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2377 // Gas list. |
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2378 // char_I_first_gas is the bottom gas. |
222
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2379 // decoplan (char_O_deco_depth, char_O_deco_time). |
234
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2380 // CF#54 == TRUE if shallowest stop first. |
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2381 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min. |
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2382 // CF#57 == deco liters/minutes (5 .. 50) or bar/min. |
224 | 2383 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
222
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2384 // |
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2385 void deco_gas_volumes(void) |
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2386 { |
338 | 2387 overlay float volumes[NUM_GAS]; |
478
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2388 overlay float bottom_usage, deco_usage; |
234
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2389 overlay unsigned char i, deepest_first; |
646 | 2390 overlay unsigned char gas, depth; |
222
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2391 RESET_C_STACK |
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2392 |
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2393 //---- initialize with bottom consumption -------------------------------- |
338 | 2394 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
240
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2395 volumes[i] = 0.0; |
222
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2396 |
338 | 2397 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
241 | 2398 gas = char_I_first_gas - 1; |
2399 | |
478
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2400 bottom_usage = (float) read_custom_function(56); |
580
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BUGFIX: GasVolume should not count bottom time/depth in CCR mode.
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|
2401 if( char_I_const_ppO2 == 0 && bottom_usage > 0.0 ) |
265 | 2402 volumes[gas] |
2403 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
2404 * char_I_bottom_time // in minutes. | |
2405 * bottom_usage; // In liter/minutes. | |
579
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BUGFIX: GasVolumes should check for a gas switch before the first stop.
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2406 |
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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2407 //---- Ascent usage ------------------------------------------------------ |
234
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BUGFIX Gas Usage when stops are shallowest first: CF54 (bug BB24).
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2408 deepest_first = read_custom_function(54) == 0; |
511
2a6293641d51
NEW NDL NDL faster/more precise simu (but no closed formula for trimix).
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2409 deco_usage = (float) read_custom_function(57); // In liter/minutes. |
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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2410 |
646 | 2411 depth = char_I_bottom_depth; |
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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diff
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2412 |
338 | 2413 for(i=0; i<NUM_STOPS; ++i) |
222
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2414 { |
658
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2415 overlay unsigned char newDepth, time; |
234
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2416 |
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2417 // Manage stops in reverse order (CF#54) |
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2418 if( deepest_first ) |
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2419 { |
241 | 2420 time = char_O_deco_time[i]; |
234
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2421 if( time == 0 ) break; // End of table: done. |
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2422 |
658
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2423 newDepth = char_O_deco_depth[i] & 0x7F; |
234
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2424 } |
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2425 else |
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2426 { |
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2427 time = char_O_deco_time[31-i]; |
658
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2428 if( time == 0 ) continue; // not yet: still search table. |
234
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2429 |
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2430 newDepth = char_O_deco_depth[31-i] & 0x7F; |
234
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2431 } |
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2432 |
658
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2433 //---- Gas switch during this step ----------------------------------- |
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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2434 { |
658
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2435 overlay unsigned char newGas = 0; |
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2436 overlay unsigned char newStop = 0; // NO CHANGE yet |
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2437 overlay unsigned char j; |
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2438 |
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2439 for(j=0; j<NUM_GAS; ++j) |
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2440 { |
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2441 // Skip gas without changing depth: |
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2442 if( ! char_I_deco_gas_change[j] ) |
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2443 continue; |
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2444 // Select gas changed between [newDepth .. depth] |
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2445 if( newDepth <= char_I_deco_gas_change[j] |
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2446 && char_I_deco_gas_change[j] <= depth ) |
646 | 2447 { |
658
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2448 // Keep the DEEPEST gas in that range: |
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2449 // Note: that = means changing gas at BEGINNING of this stop. |
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2450 if( char_I_deco_gas_change[j] >= newStop ) |
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2451 { |
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2452 newGas = j; |
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2453 newStop = char_I_deco_gas_change[j]; |
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2454 } |
646 | 2455 } |
658
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2456 } |
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2457 |
658
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|
2458 if( newStop ) // Did we find something ? |
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diff
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|
2459 { |
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2460 // usage BEFORE gas switch (if any), at 10m/min : |
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diff
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2461 if( deco_usage > 0.0 && depth > newStop ) |
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diff
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|
2462 // Plus usage during ascent to the next stop, at 10m/min. |
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diff
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|
2463 volumes[gas] += ((depth+newStop)*0.05 + 1.0) // average depth --> bar. |
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2464 * (depth-newStop)*0.1 // metre --> min |
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diff
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|
2465 * deco_usage; |
646 | 2466 |
658
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diff
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|
2467 // Do gas switch: |
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diff
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|
2468 gas = newGas; |
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diff
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|
2469 depth = newStop; |
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diff
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|
2470 } |
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diff
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|
2471 } |
646 | 2472 |
2473 // usage AFTER gas switch (if any), at 10m/min : | |
2474 if( depth > newDepth ) | |
2475 volumes[gas] += ((depth+newDepth)*0.05 + 1.0) // average depth --> bar. | |
2476 * (depth-newDepth)*0.1 // metre --> min | |
2477 * deco_usage; | |
2478 | |
2479 // Do stop: | |
2480 depth = newDepth; | |
2481 | |
2482 // Usage at stop: | |
478
fd8266b511cc
New SAC (CF56/CF57) in 5..50 l/min range (no more decimal).
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diff
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|
2483 if( deco_usage > 0.0 ) |
265 | 2484 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
2485 * time // in minutes. | |
646 | 2486 * deco_usage; // in xxx / min @ 1bar. |
265 | 2487 else |
2488 volumes[gas] = 65535.0; | |
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|
2489 } |
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2490 |
646 | 2491 // From last stop to surface |
2492 if( deco_usage > 0.0 ) | |
2493 volumes[gas] += (depth*0.05 + 1.0) // avg depth --> bar. | |
2494 * depth * 0.1 // time to surface, in minutes. | |
2495 * deco_usage; // in xxx / min @ 1bar. | |
2496 | |
222
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2497 //---- convert results for the ASM interface ----------------------------- |
338 | 2498 for(i=0; i<NUM_GAS; ++i) |
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|
2499 if( volumes[i] > 65534.0 ) |
224 | 2500 int_O_gas_volumes[i] = 65535; |
222
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|
2501 else |
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|
2502 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); |
116 | 2503 } |
2504 | |
167 | 2505 ////////////////////////////////////////////////////////////////////////////// |
2506 | |
116 | 2507 void deco_push_tissues_to_vault(void) |
2508 { | |
167 | 2509 overlay unsigned char x; |
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diff
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|
2510 RESET_C_STACK |
167 | 2511 |
116 | 2512 cns_vault = CNS_fraction; |
697 | 2513 low_depth_vault = low_depth; |
2514 | |
339 | 2515 for (x=0;x<NUM_COMP;x++) |
2516 { | |
2517 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
2518 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
2519 } | |
116 | 2520 } |
167 | 2521 |
116 | 2522 void deco_pull_tissues_from_vault(void) |
2523 { | |
167 | 2524 overlay unsigned char x; |
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diff
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|
2525 RESET_C_STACK |
167 | 2526 |
339 | 2527 for (x=0; x<NUM_COMP; x++) |
2528 { | |
2529 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
2530 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
2531 } | |
292 | 2532 |
2533 // Restore both CNS variable, too. | |
2534 CNS_fraction = cns_vault; | |
514 | 2535 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
697 | 2536 |
2537 // GF history too: | |
2538 low_depth = low_depth_vault; | |
2539 locked_GF_step = GF_delta / low_depth; | |
116 | 2540 } |
2541 | |
167 | 2542 ////////////////////////////////////////////////////////////////////////////// |
2543 // | |
184 | 2544 #ifndef CROSS_COMPILE |
2545 void main() {} | |
2546 #endif |