Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 695:5bf4f526f552
... minor cleanups ...
author | JeanDo |
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date | Wed, 13 Feb 2013 10:36:28 +0100 |
parents | 6e456a6398e0 |
children | 53e41fa1e3f0 fdeb01351f23 |
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). | |
116 | 88 // |
167 | 89 // TODO: |
90 // + Allow to abort MD2 calculation (have to restart next time). | |
91 // | |
92 // Literature: | |
200 | 93 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
116 | 94 // 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 |
95 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
96 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
97 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
98 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
167 | 99 // |
100 // | |
116 | 101 |
102 // ********************* | |
103 // ** I N C L U D E S ** | |
104 // ********************* | |
105 #include <math.h> | |
167 | 106 |
192 | 107 // *********************************************** |
108 // ** V A R I A B L E S D E F I N I T I O N S ** | |
109 // *********************************************** | |
110 | |
111 #include "p2_definitions.h" | |
275
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112 #define TEST_MAIN |
509 | 113 #include "../OSTC_code_asm_part1/shared_definitions.h" |
192 | 114 |
200 | 115 // Water vapour partial pressure in the lumb. |
527 | 116 #define ppWater 0.0627 |
317 | 117 #define METER_TO_BAR 0.09985 |
118 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
200 | 119 |
491
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120 // Surface security factor |
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121 #define SURFACE_DESAT_FACTOR 0.7042 |
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122 |
167 | 123 // ************************* |
124 // ** P R O T O T Y P E S ** | |
125 // ************************* | |
126 | |
127 static void calc_hauptroutine(void); | |
128 static void calc_nullzeit(void); | |
129 | |
192 | 130 static void calc_tissue(PARAMETER unsigned char period); |
258 | 131 static void calc_limit(void); |
192 | 132 |
167 | 133 static void clear_tissue(void); |
134 static void calc_ascenttime(void); | |
135 static void update_startvalues(void); | |
169
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136 static void clear_deco_table(void); |
471 | 137 static unsigned char update_deco_table(void); |
192 | 138 |
139 static void sim_tissue(PARAMETER unsigned char period); | |
140 static void sim_limit(PARAMETER float GF_current); | |
312
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141 static void sim_extra_time(void); |
368 | 142 static void calc_dive_interval(void); |
312
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143 |
167 | 144 static void calc_gradient_factor(void); |
145 static void calc_wo_deco_step_1_min(void); | |
146 | |
147 static void calc_hauptroutine_data_input(void); | |
148 static void calc_hauptroutine_update_tissues(void); | |
149 static void calc_hauptroutine_calc_deco(void); | |
169
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150 static void sim_ascent_to_first_stop(void); |
167 | 151 |
241 | 152 static unsigned char gas_switch_deepest(void); |
153 static void gas_switch_set(void); | |
217 | 154 |
241 | 155 static unsigned char calc_nextdecodepth(void); |
116 | 156 |
200 | 157 //---- Bank 4 parameters ----------------------------------------------------- |
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158 #ifndef UNIX |
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159 # pragma udata bank4=0x400 |
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160 #endif |
116 | 161 |
162 static float GF_low; | |
163 static float GF_high; | |
164 static float GF_delta; | |
192 | 165 static float locked_GF_step; // GF_delta / low_depth |
166 | |
167 static unsigned char temp_depth_limit; | |
695 | 168 float low_depth; // Depth of deepest stop |
171 | 169 |
192 | 170 // Simulation context: used to predict ascent. |
695 | 171 unsigned char sim_lead_tissue_no; // Leading compatiment number. |
172 float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
116 | 173 |
192 | 174 // Real context: what we are doing now. |
175 static float calc_lead_tissue_limit; // | |
116 | 176 |
338 | 177 static unsigned char internal_deco_time[NUM_STOPS]; |
178 static unsigned char internal_deco_depth[NUM_STOPS]; | |
116 | 179 |
180 static float cns_vault; | |
339 | 181 static float pres_tissue_N2_vault[NUM_COMP]; |
182 static float pres_tissue_He_vault[NUM_COMP]; | |
116 | 183 |
163 | 184 //---- Bank 5 parameters ----------------------------------------------------- |
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185 #ifndef UNIX |
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186 # pragma udata bank5=0x500 |
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187 #endif |
163 | 188 |
167 | 189 static unsigned char ci; |
116 | 190 static float pres_respiration; |
191 static float pres_surface; | |
192 static float temp_deco; | |
236 | 193 static float ppN2; |
200 | 194 static float ppHe; |
116 | 195 static float temp_tissue; |
200 | 196 static float N2_ratio; // Breathed gas nitrogen ratio. |
197 static float He_ratio; // Breathed gas helium ratio. | |
198 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
199 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
200 static float var_He_a; // Bühlmann a, for current He tissue. | |
201 static float var_He_b; // Bühlmann b, for current He tissue. | |
202 static float var_N2_e; // Exposition, for current N2 tissue. | |
203 static float var_He_e; // Exposition, for current He tissue. | |
509 | 204 static float var_N2_ht; // Half-time for current N2 tissue. |
205 static float var_He_ht; // Half-time for current N2 tissue. | |
116 | 206 |
338 | 207 static float pres_diluent; // new in v.101 |
208 static float const_ppO2; // new in v.101 | |
116 | 209 |
241 | 210 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
211 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
203 | 212 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
213 static unsigned short sim_dive_mins; // Simulated dive time. | |
200 | 214 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
215 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
216 static float CNS_fraction; // new in v.101 | |
217 static float float_saturation_multiplier; // new in v.101 | |
218 static float float_desaturation_multiplier; // new in v.101 | |
338 | 219 static float float_deco_distance; // new in v.101 |
220 static char flag_in_divemode; // new in v.108 | |
167 | 221 |
338 | 222 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
167 | 223 |
163 | 224 //---- Bank 6 parameters ----------------------------------------------------- |
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225 #ifndef UNIX |
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226 # pragma udata bank6=0x600 |
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227 #endif |
116 | 228 |
339 | 229 float pres_tissue_N2[NUM_COMP]; |
230 float pres_tissue_He[NUM_COMP]; | |
509 | 231 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. |
232 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
116 | 233 |
163 | 234 //---- Bank 7 parameters ----------------------------------------------------- |
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235 #ifndef UNIX |
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236 # pragma udata bank7=0x700 |
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237 #endif |
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238 |
509 | 239 // EMPTY ... |
116 | 240 |
163 | 241 //---- Bank 8 parameters ----------------------------------------------------- |
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242 #ifndef UNIX |
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243 # pragma udata bank8=0x800 |
163 | 244 |
601
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245 static char md_pi_subst[256]; |
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246 # define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
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247 |
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248 #endif |
116 | 249 |
163 | 250 //---- Bank 9 parameters ----------------------------------------------------- |
601
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251 #ifndef UNIX |
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252 # pragma udata bank9=0x900 |
116 | 253 |
601
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254 static char md_state[48]; // DONT MOVE : has to be at the beginning of bank 9 for the asm code!!! |
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255 #endif |
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256 |
116 | 257 |
167 | 258 ////////////////////////////////////////////////////////////////////////////// |
259 ////////////////////////////////////////////////////////////////////////////// | |
260 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
261 ////////////////////////////////////////////////////////////////////////////// | |
262 ////////////////////////////////////////////////////////////////////////////// | |
263 // | |
264 // End of PROM code is 17F00, So push tables on PROM top... | |
265 // | |
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266 #ifndef UNIX |
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267 # pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. |
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268 #endif |
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269 |
167 | 270 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) |
116 | 271 |
167 | 272 // Magic table to compute the MD2 HASH |
273 // | |
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274 #ifndef UNIX |
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275 # pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... |
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276 rom const rom unsigned short md_pi[] = |
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277 { |
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278 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 |
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279 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA |
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280 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 |
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281 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A |
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282 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 |
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283 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 |
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284 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 |
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285 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 |
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286 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 |
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287 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F |
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288 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 |
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289 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 |
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290 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A |
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291 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 |
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292 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A |
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293 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 |
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294 }; |
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295 #endif |
116 | 296 |
167 | 297 ////////////////////////////////////////////////////////////////////////////// |
298 ////////////////////////////////////////////////////////////////////////////// | |
299 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
300 ////////////////////////////////////////////////////////////////////////////// | |
301 ////////////////////////////////////////////////////////////////////////////// | |
302 // | |
116 | 303 // all new in v.102 |
304 // moved from 0x0D000 to 0x0C000 in v.108 | |
601
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305 #ifndef UNIX |
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306 # pragma code p2_deco = 0x0C000 |
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307 #endif |
116 | 308 |
167 | 309 ////////////////////////////////////////////////////////////////////////////// |
310 ////////////////////////////////////////////////////////////////////////////// | |
311 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
312 ////////////////////////////////////////////////////////////////////////////// | |
313 ////////////////////////////////////////////////////////////////////////////// | |
314 | |
235 | 315 ////////////////////////////////////////////////////////////////////////////// |
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316 // Bump to blue-screen when an assert is wrong |
235 | 317 #ifdef __DEBUG |
318 void assert_failed(PARAMETER short int line) | |
319 { | |
681 | 320 extern void DISP_resetdebugger(void); |
235 | 321 extern unsigned short temp10; |
322 | |
257
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323 temp10 = line; // Show source line number as stack depth. |
681 | 324 DISP_resetdebugger(); |
235 | 325 } |
326 #endif | |
257
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327 |
235 | 328 ////////////////////////////////////////////////////////////////////////////// |
329 // When calling C code from ASM context, the data stack pointer and | |
330 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
331 | |
332 #ifdef CROSS_COMPILE | |
333 # define RESET_C_STACK | |
334 #else | |
335 # ifdef __DEBUG | |
336 # define RESET_C_STACK fillDataStack(); | |
337 void fillDataStack(void) | |
338 { | |
339 _asm | |
340 LFSR 1,C_STACK | |
341 MOVLW 0xCC | |
342 loop: MOVWF POSTINC1,0 | |
343 TSTFSZ FSR1L,0 | |
344 BRA loop | |
345 | |
346 LFSR 1,C_STACK | |
347 LFSR 2,C_STACK | |
348 _endasm | |
349 } | |
350 # else | |
351 # define RESET_C_STACK \ | |
352 _asm \ | |
353 LFSR 1, C_STACK \ | |
354 LFSR 2, C_STACK \ | |
355 _endasm | |
356 # endif | |
357 #endif | |
358 | |
359 ////////////////////////////////////////////////////////////////////////////// | |
257
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360 // Read CF values from the C code. |
235 | 361 |
488 | 362 #ifdef CROSS_COMPILE |
363 // Full description of the OSTC EEPROM map, including CF values. | |
364 # include "OSTC_eeprom.h" | |
365 #endif | |
366 | |
203 | 367 static short read_custom_function(PARAMETER unsigned char cf) |
167 | 368 { |
184 | 369 #ifdef CROSS_COMPILE |
564 | 370 return (cf & 32) ? eeprom.bank1_CF[cf-32].value.lo |
371 : eeprom.bank0_CF[cf ].value.lo; | |
184 | 372 #else |
167 | 373 extern unsigned char hi, lo; |
374 extern void getcustom15(); | |
375 _asm | |
376 movff cf,WREG | |
377 call getcustom15,0 | |
378 movff lo,PRODL | |
379 movff hi,PRODH | |
380 _endasm | |
184 | 381 #endif |
167 | 382 } |
383 | |
384 ////////////////////////////////////////////////////////////////////////////// | |
257
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385 // Fast subroutine to read RTC timer 3. |
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386 // Note: result is in 1/32 of msecs. |
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387 static unsigned short tmr3(void) |
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388 { |
261 | 389 #ifndef CROSS_COMPILE |
257
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390 _asm |
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391 movff 0xfb2,PRODL // TMR3L |
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392 movff 0xfb3,PRODH // TMR3H |
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393 _endasm // result in PRODH:PRODL. |
261 | 394 #else |
395 return 0; | |
396 #endif | |
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397 } |
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398 |
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399 ////////////////////////////////////////////////////////////////////////////// |
258 | 400 // read buhlmann tables A and B for compatriment ci |
401 // | |
402 static void read_buhlmann_coefficients(void) | |
165 | 403 { |
184 | 404 #ifndef CROSS_COMPILE |
167 | 405 // Note: we don't use far rom pointer, because the |
338 | 406 // 24 bits is too complex, hence we have to set |
167 | 407 // the UPPER page ourself... |
408 // --> Set zero if tables are moved to lower pages ! | |
409 _asm | |
410 movlw 1 | |
411 movwf TBLPTRU,0 | |
412 _endasm | |
184 | 413 #endif |
258 | 414 |
564 | 415 assert( ci < NUM_COMP ); |
338 | 416 |
417 // Use an interleaved array (AoS) to access coefficients with a | |
418 // single addressing. | |
419 { | |
420 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
421 var_N2_a = *ptr++; | |
422 var_N2_b = *ptr++; | |
423 var_He_a = *ptr++; | |
424 var_He_b = *ptr++; | |
425 } | |
258 | 426 } |
427 | |
428 ////////////////////////////////////////////////////////////////////////////// | |
429 // read buhlmann tables for compatriment ci | |
430 // If period == 0 : 2sec interval | |
431 // 1 : 1 min interval | |
432 // 2 : 10 min interval. | |
433 static void read_buhlmann_times(PARAMETER char period) | |
434 { | |
435 #ifndef CROSS_COMPILE | |
436 // Note: we don't use far rom pointer, because the | |
437 // 24 bits is to complex, hence we have to set | |
438 // the UPPER page ourself... | |
439 // --> Set zero if tables are moved to lower pages ! | |
440 _asm | |
441 movlw 1 | |
442 movwf TBLPTRU,0 | |
443 _endasm | |
444 #endif | |
338 | 445 |
564 | 446 assert( ci < NUM_COMP ); |
258 | 447 |
165 | 448 // Integration intervals. |
167 | 449 switch(period) |
165 | 450 { |
451 case 0: //---- 2 sec ----------------------------------------------------- | |
338 | 452 { |
453 overlay rom const float* ptr = &e2secs[2*ci]; | |
454 var_N2_e = *ptr++; | |
455 var_He_e = *ptr++; | |
456 } | |
165 | 457 break; |
458 | |
459 case 1: //---- 1 min ----------------------------------------------------- | |
338 | 460 { |
461 overlay rom const float* ptr = &e1min[2*ci]; | |
462 var_N2_e = *ptr++; | |
463 var_He_e = *ptr++; | |
464 } | |
165 | 465 break; |
466 | |
467 case 2: //---- 10 min ---------------------------------------------------- | |
338 | 468 { |
469 overlay rom const float* ptr = &e10min[2*ci]; | |
470 var_N2_e = *ptr++; | |
471 var_He_e = *ptr++; | |
472 } | |
165 | 473 break; |
197 | 474 |
475 default: | |
527 | 476 assert(0); // Never go there... |
165 | 477 } |
478 } | |
479 | |
480 ////////////////////////////////////////////////////////////////////////////// | |
509 | 481 // read buhlmann tables for compatriment ci |
482 // | |
483 static void read_buhlmann_ht(void) | |
484 { | |
485 | |
486 #ifndef CROSS_COMPILE | |
487 // Note: we don't use far rom pointer, because the | |
488 // 24 bits is to complex, hence we have to set | |
489 // the UPPER page ourself... | |
490 // --> Set zero if tables are moved to lower pages ! | |
491 _asm | |
492 movlw 1 | |
493 movwf TBLPTRU,0 | |
494 _endasm | |
495 #endif | |
496 | |
564 | 497 assert( ci < NUM_COMP ); |
509 | 498 { |
499 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
500 var_N2_ht = *ptr++; | |
501 var_He_ht = *ptr++; | |
502 } | |
503 | |
504 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
505 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
506 } | |
507 | |
508 ////////////////////////////////////////////////////////////////////////////// | |
340
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509 // calc_nextdecodepth |
165 | 510 // |
116 | 511 // new in v.102 |
165 | 512 // |
116 | 513 // INPUT, changing during dive: |
509 | 514 // temp_deco |
192 | 515 // low_depth |
167 | 516 // |
116 | 517 // INPUT, fixed during dive: |
167 | 518 // pres_surface |
519 // GF_delta | |
520 // GF_high | |
521 // GF_low | |
171 | 522 // char_I_depth_last_deco |
167 | 523 // float_deco_distance |
524 // | |
241 | 525 // RETURN TRUE iff a stop is needed. |
526 // | |
116 | 527 // OUTPUT |
171 | 528 // locked_GF_step |
167 | 529 // temp_depth_limt |
192 | 530 // low_depth |
167 | 531 // |
241 | 532 static unsigned char calc_nextdecodepth(void) |
167 | 533 { |
241 | 534 //--- Max ascent speed --------------------------------------------------- |
535 // Recompute leading gas limit, at current depth: | |
317 | 536 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
241 | 537 |
538 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
302 | 539 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
241 | 540 |
541 // Do we need to stop at current depth ? | |
542 overlay unsigned char need_stop = 0; | |
543 | |
544 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
545 | |
212 | 546 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
509 | 547 if( char_I_deco_model != 0 ) |
116 | 548 { |
562 | 549 overlay unsigned char first_stop = 0; |
550 overlay float p; | |
551 | |
567 | 552 sim_limit( GF_low ); |
562 | 553 p = sim_lead_tissue_limit - pres_surface; |
695 | 554 p *= BAR_TO_METER; |
562 | 555 if( p <= 0.0f ) |
556 goto no_deco_stop; // We can surface directly... | |
512
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557 |
695 | 558 // Store the deepest point needing a deco stop as the LOW reference for GF. |
559 // NOTE: following stops will be validated using this LOW-HIGH gf scale, | |
560 // so if we want to keep coherency, we should not validate this stop | |
561 // yet, but apply the search to it, as for all the following stops afterward. | |
562 if( p > low_depth ) | |
563 { | |
564 low_depth = p; | |
565 locked_GF_step = GF_delta / low_depth; | |
566 } | |
567 | |
562 | 568 if( p < min_depth ) |
569 goto no_deco_stop; // First stop is higher than 1' ascent. | |
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570 |
695 | 571 // Round to multiple of 3m. |
572 first_stop = 3 * (short)(0.9995f + p*0.333333f); | |
562 | 573 assert( first_stop < 128 ); |
574 | |
575 // Apply correction for the shallowest stop. | |
576 if( first_stop == 3 ) // new in v104 | |
577 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
171 | 578 |
562 | 579 // We have a stop candidate. |
580 // But maybe ascending to the next stop will diminish the constraint, | |
581 // because the GF might decrease more than the preassure gradient... | |
582 while(first_stop > 0) | |
583 { | |
584 overlay unsigned char next_stop; // Next depth (0..90m) | |
171 | 585 |
562 | 586 // Check max speed, or reaching surface. |
587 if( first_stop <= min_depth ) | |
588 goto no_deco_stop; | |
171 | 589 |
562 | 590 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
591 next_stop = 0; | |
592 else if( first_stop == 6 ) | |
593 next_stop = char_I_depth_last_deco; | |
594 else | |
595 next_stop = first_stop - 3; // Index of next (upper) stop. | |
596 | |
597 // Total preassure at the new stop candidate: | |
695 | 598 p = next_stop * METER_TO_BAR |
599 + pres_surface; | |
167 | 600 |
695 | 601 // Recompute limit for this new stop: |
602 if( !low_depth || next_stop > low_depth ) | |
603 sim_limit( GF_low ); | |
604 else | |
605 sim_limit( GF_high - next_stop * locked_GF_step ); | |
192 | 606 |
695 | 607 // Check upper limit (lowest ambiant pressure tolerated): |
608 if( sim_lead_tissue_limit >= p ) | |
609 goto deco_stop_found; // Ascent to next_stop forbiden. | |
562 | 610 |
611 // Else, validate that stop and loop... | |
612 first_stop = next_stop; | |
613 } | |
171 | 614 |
562 | 615 no_deco_stop: |
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616 temp_depth_limit = min_depth; |
562 | 617 goto done; |
212 | 618 |
695 | 619 deco_stop_found: |
562 | 620 // next stop is the last validated depth found, aka first_stop |
621 need_stop = 1; // Hit. | |
622 temp_depth_limit = first_stop; // Stop depth, in meter. | |
623 | |
624 done: | |
625 ; | |
116 | 626 } |
167 | 627 else //---- ZH-L16 model ------------------------------------------------- |
116 | 628 { |
192 | 629 overlay float pres_gradient; |
630 | |
631 // Original model | |
116 | 632 // optimized in v.101 |
171 | 633 // char_I_depth_last_deco included in v.101 |
116 | 634 |
192 | 635 // Compute sim_lead_tissue_limit too, but just once. |
636 sim_limit(1.0); | |
637 | |
638 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
167 | 639 if (pres_gradient >= 0) |
116 | 640 { |
317 | 641 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
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642 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
241 | 643 need_stop = 1; // Hit. |
644 | |
645 // Implement last stop at 4m/5m/6m... | |
646 if( temp_depth_limit == 3 ) | |
647 temp_depth_limit = char_I_depth_last_deco; | |
171 | 648 } |
116 | 649 else |
241 | 650 temp_depth_limit = 0; |
171 | 651 } |
212 | 652 |
217 | 653 //---- Check gas change -------------------------------------------------- |
241 | 654 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
655 | |
656 return need_stop; | |
167 | 657 } |
116 | 658 |
167 | 659 ////////////////////////////////////////////////////////////////////////////// |
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660 // copy_deco_table |
167 | 661 // |
169
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662 // Buffer the stops, once computed, so we can continue to display them |
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663 // while computing the next set. |
167 | 664 // |
169
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665 static void copy_deco_table(void) |
116 | 666 { |
169
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667 // Copy depth of the first (deepest) stop, because when reversing |
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668 // order, it will be hard to find... |
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669 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
169
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670 char_O_first_deco_time = internal_deco_time [0]; |
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671 |
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672 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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673 { |
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674 overlay unsigned char x, y; |
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675 |
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676 //---- First: search the first non-null depth |
339 | 677 for(x=(NUM_STOPS-1); x != 0; --x) |
169
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678 if( internal_deco_depth[x] != 0 ) break; |
116 | 679 |
169
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680 //---- Second: copy to output table (in reverse order) |
338 | 681 for(y=0; y<NUM_STOPS; y++, --x) |
169
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682 { |
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683 char_O_deco_depth[y] = internal_deco_depth[x]; |
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684 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
169
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685 char_O_deco_time [y] = internal_deco_time [x]; |
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686 |
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687 // Stop only once the last transfer is done. |
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688 if( x == 0 ) break; |
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689 } |
116 | 690 |
169
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691 //---- Third: fill table end with null |
339 | 692 for(y++; y<NUM_STOPS; y++) |
169
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693 { |
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694 char_O_deco_time [y] = 0; |
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695 char_O_deco_depth[y] = 0; |
630
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696 char_O_deco_time_for_log[y] = 0; |
169
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697 } |
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698 } |
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699 else //---- Straight copy ------------------------------------------------ |
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700 { |
630
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701 overlay unsigned char x, y; |
167 | 702 |
339 | 703 for(x=0; x<NUM_STOPS; x++) |
169
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704 { |
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705 char_O_deco_depth[x] = internal_deco_depth[x]; |
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706 char_O_deco_time [x] = internal_deco_time [x]; |
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707 } |
630
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708 |
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709 //Now fill the char_O_deco_time_for_log array |
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710 //---- First: search the first non-null depth |
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711 for(x=(NUM_STOPS-1); x != 0; --x) |
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712 if( internal_deco_depth[x] != 0 ) break; |
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713 |
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714 //---- Second: copy to output table (in reverse order) |
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715 for(y=0; y<NUM_STOPS; y++, --x) |
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716 { |
633
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717 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
630
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718 |
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719 // Stop only once the last transfer is done. |
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720 if( x == 0 ) break; |
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721 } |
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722 |
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723 //---- Third: fill table end with null |
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724 for(y++; y<NUM_STOPS; y++) |
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725 { |
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726 char_O_deco_time_for_log [y] = 0; |
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727 } |
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728 |
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729 } |
167 | 730 } |
116 | 731 |
167 | 732 ////////////////////////////////////////////////////////////////////////////// |
116 | 733 // temp_tissue_safety // |
167 | 734 // |
116 | 735 // outsourced in v.102 |
167 | 736 // |
737 // Apply safety factors for brand ZH-L16 model. | |
738 // | |
739 static void temp_tissue_safety(void) | |
116 | 740 { |
197 | 741 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
742 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
743 | |
167 | 744 if( char_I_deco_model == 0 ) |
116 | 745 { |
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746 if( temp_tissue < 0.0 ) |
126 | 747 temp_tissue *= float_desaturation_multiplier; |
116 | 748 else |
126 | 749 temp_tissue *= float_saturation_multiplier; |
116 | 750 } |
167 | 751 } |
116 | 752 |
167 | 753 ////////////////////////////////////////////////////////////////////////////// |
754 ////////////////////////////////////////////////////////////////////////////// | |
116 | 755 // ** THE JUMP-IN CODE ** |
756 // ** for the asm code ** | |
167 | 757 ////////////////////////////////////////////////////////////////////////////// |
758 ////////////////////////////////////////////////////////////////////////////// | |
122
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759 |
167 | 760 ////////////////////////////////////////////////////////////////////////////// |
169
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761 // Called every 2 seconds during diving. |
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762 // update tissues every time. |
184 | 763 // |
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764 // Every 6 seconds (or slower when TTS > 16): |
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765 // - update deco table (char_O_deco_time/depth) with new values. |
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766 // - update ascent time, |
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767 // - set status to zero (so we can check there is new results). |
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768 // |
116 | 769 void deco_calc_hauptroutine(void) |
770 { | |
122
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771 RESET_C_STACK |
116 | 772 calc_hauptroutine(); |
773 int_O_desaturation_time = 65535; | |
774 } | |
775 | |
167 | 776 ////////////////////////////////////////////////////////////////////////////// |
184 | 777 // Reset decompression model: |
778 // + Set all tissues to equilibrium with Air at ambient pressure. | |
779 // + Reset last stop to 0m | |
780 // + Reset all model output. | |
116 | 781 void deco_clear_tissue(void) |
782 { | |
122
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783 RESET_C_STACK |
116 | 784 clear_tissue(); |
785 } | |
786 | |
167 | 787 ////////////////////////////////////////////////////////////////////////////// |
278 | 788 // Called every 1 min during decoplanning. |
789 // Update tissues for 1 min. | |
790 // | |
791 void deco_calc_tissue(void) | |
792 { | |
793 RESET_C_STACK | |
794 calc_hauptroutine_update_tissues(); | |
795 } | |
796 | |
797 ////////////////////////////////////////////////////////////////////////////// | |
167 | 798 |
116 | 799 void deco_calc_wo_deco_step_1_min(void) |
800 { | |
122
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801 RESET_C_STACK |
116 | 802 calc_wo_deco_step_1_min(); |
803 deco_calc_desaturation_time(); | |
804 } | |
805 | |
167 | 806 ////////////////////////////////////////////////////////////////////////////// |
807 | |
368 | 808 void deco_calc_dive_interval(void) |
809 { | |
810 RESET_C_STACK | |
811 calc_dive_interval(); | |
812 } | |
813 | |
241 | 814 ////////////////////////////////////////////////////////////////////////////// |
815 // Find current gas in the list (if any). | |
816 // | |
513 | 817 // Input: char_I_current_gas = 1..6 |
241 | 818 // |
513 | 819 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. |
241 | 820 // |
821 static void gas_switch_find_current(void) | |
822 { | |
513 | 823 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
247
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824 |
388 | 825 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 |
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826 { |
388 | 827 sim_gas_last_used = char_I_current_gas; |
828 | |
829 // Note: if current is first gas, we must find it, but not set | |
830 // last depth change to surface. | |
831 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
832 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
241 | 833 } |
388 | 834 else |
835 sim_gas_last_used = 0; // Gas 6 = manual set | |
241 | 836 } |
837 | |
167 | 838 ////////////////////////////////////////////////////////////////////////////// |
217 | 839 // Find deepest available gas. |
201 | 840 // |
241 | 841 // Input: temp_depth_limit, |
842 // deco_gas_change[] | |
843 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
212 | 844 // |
241 | 845 // RETURNS TRUE if a stop is needed for gas switch. |
846 // | |
847 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
212 | 848 // |
241 | 849 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
850 // are null), or during the ascent to make sure we are not passing a | |
851 // stop (in which case both can be already set). | |
852 // | |
853 static unsigned char gas_switch_deepest(void) | |
201 | 854 { |
241 | 855 overlay unsigned char switch_deco = 0, switch_last = 0; |
201 | 856 |
857 if (char_I_const_ppO2 == 0) | |
858 { | |
225 | 859 overlay unsigned char j; |
860 | |
241 | 861 // Loop over all enabled gas, to find the deepest one, |
340
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862 // above last used gas, but below temp_depth_limit. |
338 | 863 for(j=0; j<NUM_GAS; ++j) |
225 | 864 { |
241 | 865 // Gas not (yet) allowed ? Skip ! |
866 if( temp_depth_limit > deco_gas_change[j] ) | |
867 continue; | |
868 | |
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869 // Gas deeper (or equal) than the current one ? Skip ! |
241 | 870 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
871 continue; | |
872 | |
873 // First, or deeper ? | |
247
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874 if( switch_deco < deco_gas_change[j] ) |
241 | 875 { |
876 switch_deco = deco_gas_change[j]; | |
388 | 877 switch_last = j+1; // 1..5 |
241 | 878 } |
225 | 879 } |
201 | 880 } |
881 | |
203 | 882 // If there is a better gas available |
241 | 883 if( switch_deco ) |
201 | 884 { |
646 | 885 unsigned char delay; |
886 delay = read_custom_function(55); | |
555
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887 |
241 | 888 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
201 | 889 |
241 | 890 // Should restart gas-switch delay only when gas do changes... |
891 assert( sim_gas_delay <= sim_dive_mins ); | |
217 | 892 |
241 | 893 sim_gas_last_depth = switch_deco; |
894 sim_gas_last_used = switch_last; | |
555
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895 sim_gas_delay = delay |
540
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896 + sim_dive_mins; |
217 | 897 |
555
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898 if( delay ) |
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899 { |
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900 temp_depth_limit = switch_deco; |
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901 return 1; |
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902 } |
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903 else |
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904 return 0; |
217 | 905 } |
906 | |
241 | 907 sim_gas_delay = 0; |
908 return 0; | |
217 | 909 } |
910 | |
911 ////////////////////////////////////////////////////////////////////////////// | |
912 // Calculate gas switches | |
913 // | |
914 // | |
915 // Input: N2_ratio, He_ratio. | |
916 // sim_gas_last_used | |
917 // | |
918 // Output: calc_N2_ratio, calc_He_ratio | |
919 // | |
241 | 920 static void gas_switch_set(void) |
217 | 921 { |
564 | 922 assert( sim_gas_last_used <= NUM_GAS ); |
217 | 923 |
388 | 924 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. |
224 | 925 { |
926 calc_N2_ratio = N2_ratio; | |
927 calc_He_ratio = He_ratio; | |
928 } | |
929 else | |
930 { | |
931 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
932 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
217 | 933 } |
201 | 934 |
935 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
936 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
937 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
938 } | |
939 | |
940 ////////////////////////////////////////////////////////////////////////////// | |
941 // | |
212 | 942 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
509 | 943 // temp_deco : simulated respiration pressure |
276 | 944 // float_deco_distance : security factor. |
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945 // Water-vapor pressure inside limbs (ppWater). |
212 | 946 // |
236 | 947 // Output: ppN2, ppHe. |
212 | 948 // |
949 static void sim_alveolar_presures(void) | |
201 | 950 { |
212 | 951 overlay float deco_diluent = temp_deco; // new in v.101 |
952 | |
276 | 953 // Take deco offset into account, but not at surface. |
954 // Note: this should be done on ambiant pressure, hence before | |
955 // computing the diluant partial pressure... | |
956 if( deco_diluent > pres_surface ) | |
957 deco_diluent += float_deco_distance; | |
958 | |
212 | 959 //---- CCR mode : deco gas switch ? -------------------------------------- |
276 | 960 if( char_I_const_ppO2 != 0 ) |
201 | 961 { |
276 | 962 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
963 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
310
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964 // ppWater in the equations below: |
321 | 965 deco_diluent -= const_ppO2; |
276 | 966 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
212 | 967 |
968 if (deco_diluent > temp_deco) | |
969 deco_diluent = temp_deco; | |
201 | 970 } |
971 | |
310
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972 if( deco_diluent > ppWater ) |
201 | 973 { |
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974 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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975 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
201 | 976 } |
977 else | |
978 { | |
236 | 979 ppN2 = 0.0; |
201 | 980 ppHe = 0.0; |
981 } | |
236 | 982 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
201 | 983 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
984 } | |
985 | |
986 ////////////////////////////////////////////////////////////////////////////// | |
167 | 987 // clear_tissue |
988 // | |
165 | 989 // optimized in v.101 (var_N2_a) |
167 | 990 // |
991 // preload tissues with standard pressure for the given ambient pressure. | |
992 // Note: fixed N2_ratio for standard air. | |
201 | 993 // |
167 | 994 static void clear_tissue(void) |
116 | 995 { |
511
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996 overlay float p; |
116 | 997 flag_in_divemode = 0; |
998 | |
167 | 999 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
1000 N2_ratio = 0.7902; | |
212 | 1001 pres_respiration = int_I_pres_respiration * 0.001; |
164 | 1002 |
511
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1003 p = N2_ratio * (pres_respiration - ppWater); |
338 | 1004 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1005 { |
511
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1006 // cycle through the 16 Bühlmann N2 tissues |
339 | 1007 pres_tissue_N2[ci] = p; |
197 | 1008 |
1009 // cycle through the 16 Bühlmann tissues for Helium | |
339 | 1010 pres_tissue_He[ci] = 0.0; |
511
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1011 } |
116 | 1012 |
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1013 clear_deco_table(); |
126 | 1014 char_O_deco_status = 0; |
1015 char_O_nullzeit = 0; | |
168 | 1016 int_O_ascenttime = 0; |
126 | 1017 char_O_gradient_factor = 0; |
1018 char_O_relative_gradient_GF = 0; | |
258 | 1019 |
1020 calc_lead_tissue_limit = 0.0; | |
1021 char_O_gtissue_no = 0; | |
167 | 1022 } |
116 | 1023 |
167 | 1024 ////////////////////////////////////////////////////////////////////////////// |
1025 // calc_hauptroutine | |
1026 // | |
1027 // this is the major code in dive mode calculates: | |
116 | 1028 // the tissues, |
167 | 1029 // the bottom time, |
1030 // and simulates the ascend with all deco stops. | |
171 | 1031 // |
1032 // The deco_state sequence is : | |
1033 // 3 (at surface) | |
1034 // +---> 0 : calc nullzeit | |
1035 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
1036 // | +-> 1 : simulate up to 16min of stops. | |
1037 // | +------< not finished | |
1038 // +--------< finish | |
1039 // | |
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1040 // Added steps 6,5 for @+5 calculation: |
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1041 // 6 = ascent to first stop (same as 2), except continue to 7 |
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1042 // 7 = same as 1, except loop to 7. |
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1043 // |
167 | 1044 static void calc_hauptroutine(void) |
116 | 1045 { |
241 | 1046 static unsigned char backup_gas_used = 0; |
1047 static unsigned char backup_gas_depth = 0; | |
217 | 1048 static unsigned char backup_gas_delay = 0; |
186 | 1049 |
116 | 1050 calc_hauptroutine_data_input(); |
1051 | |
1052 calc_hauptroutine_update_tissues(); | |
1053 calc_gradient_factor(); | |
1054 | |
167 | 1055 // toggle between calculation for nullzeit (bottom time), |
1056 // deco stops | |
1057 // and more deco stops (continue) | |
1058 switch( char_O_deco_status ) | |
116 | 1059 { |
186 | 1060 case 3: //---- At surface: start a new dive ------------------------------ |
1061 clear_deco_table(); | |
1062 copy_deco_table(); | |
200 | 1063 int_O_ascenttime = 0; // Reset DTR. |
323 | 1064 int_O_extra_ascenttime = 0; |
200 | 1065 char_O_nullzeit = 0; // Reset bottom time. |
278 | 1066 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
201 | 1067 |
217 | 1068 // Values that should be reset just once for the full real dive. |
1069 // This is used to record the lowest stop for the whole dive, | |
1070 // Including ACCROSS all simulated ascent. | |
695 | 1071 low_depth = 0.0; |
567 | 1072 locked_GF_step = 0.0; |
217 | 1073 |
1074 // Reset gas switch history. | |
241 | 1075 backup_gas_used = sim_gas_last_used = 0; |
1076 backup_gas_depth = sim_gas_last_depth = 0; | |
217 | 1077 backup_gas_delay = sim_gas_delay = 0; |
203 | 1078 sim_dive_mins = 0; |
1079 break; | |
186 | 1080 |
167 | 1081 case 0: //---- bottom time ----------------------------------------------- |
312
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1082 default: |
509 | 1083 gas_switch_find_current(); // Lookup for current gas & time. |
1084 gas_switch_set(); // setup calc_ratio's | |
1085 | |
167 | 1086 calc_nullzeit(); |
534
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1087 if( char_O_nullzeit > 0 ) // Some NDL time left ? |
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1088 { |
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1089 char_O_deco_status = 0; // YES: recalc ndl next time. |
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1090 clear_deco_table(); // Also clear stops ! |
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1091 copy_deco_table(); |
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1092 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) |
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1093 } |
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1094 else |
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1095 char_O_deco_status = 2; // NO: calc ascent next time. |
186 | 1096 break; |
1097 | |
1098 case 2: //---- Simulate ascent to first stop ----------------------------- | |
312
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1099 case 6: // @+5min variation |
203 | 1100 // Check proposed gas at begin of ascent simulation |
247
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1101 sim_dive_mins = int_I_divemins; // Init current time. |
241 | 1102 |
532 | 1103 gas_switch_find_current(); // Lookup for current gas & time. |
1104 gas_switch_set(); // setup calc_ratio's | |
1105 | |
247
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1106 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1107 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
203 | 1108 backup_gas_delay = sim_gas_delay; |
186 | 1109 |
1110 sim_ascent_to_first_stop(); | |
201 | 1111 |
312
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1112 // Calc stops next time (deco or gas switch). |
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1113 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
167 | 1114 break; |
169
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1115 |
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1116 case 1: //---- Simulate stops -------------------------------------------- |
312
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1117 case 5: // @+5 variation. |
167 | 1118 calc_hauptroutine_calc_deco(); |
186 | 1119 |
1120 // If simulation is finished, restore the GF low reference, so that | |
1121 // next ascent simulation is done from the current depth: | |
312
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1122 if( (char_O_deco_status & 3) == 0 ) |
186 | 1123 { |
241 | 1124 sim_gas_last_used = backup_gas_used; |
1125 sim_gas_last_depth = backup_gas_depth; | |
247
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1126 sim_gas_delay = backup_gas_delay; |
186 | 1127 } |
167 | 1128 break; |
116 | 1129 } |
167 | 1130 |
116 | 1131 } |
1132 | |
167 | 1133 ////////////////////////////////////////////////////////////////////////////// |
1134 // calc_hauptroutine_data_input | |
1135 // | |
1136 // Reset all C-code dive parameters from their ASM-code values. | |
1137 // Detect gas change condition. | |
1138 // | |
116 | 1139 void calc_hauptroutine_data_input(void) |
1140 { | |
203 | 1141 overlay short int_temp; |
511
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1142 overlay unsigned char g; |
126 | 1143 |
197 | 1144 pres_respiration = int_I_pres_respiration * 0.001; |
1145 pres_surface = int_I_pres_surface * 0.001; | |
1146 N2_ratio = char_I_N2_ratio * 0.01; | |
1147 He_ratio = char_I_He_ratio * 0.01; | |
1148 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
116 | 1149 |
126 | 1150 // ____________________________________________________ |
1151 // | |
1152 // _____________ G A S _ C H A N G E S ________________ | |
1153 // ____________________________________________________ | |
1154 | |
212 | 1155 // Keep a margin of 150mbar = 1.50m |
1156 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
1157 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
126 | 1158 |
203 | 1159 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
511
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1160 for(g=0; g < NUM_GAS; ++g) |
126 | 1161 { |
511
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1162 deco_gas_change[g] = 0; |
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1163 if(char_I_deco_gas_change[g]) |
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1164 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) |
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1165 deco_gas_change[g] = char_I_deco_gas_change[g]; |
126 | 1166 } |
116 | 1167 |
197 | 1168 const_ppO2 = char_I_const_ppO2 * 0.01; |
1169 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
1170 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
1171 GF_low = char_I_GF_Low_percentage * 0.01; | |
1172 GF_high = char_I_GF_High_percentage * 0.01; | |
126 | 1173 GF_delta = GF_high - GF_low; |
116 | 1174 } |
1175 | |
167 | 1176 ////////////////////////////////////////////////////////////////////////////// |
171 | 1177 // |
1178 // | |
116 | 1179 void calc_hauptroutine_update_tissues(void) |
1180 { | |
197 | 1181 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
1182 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
1183 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
237 | 1184 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
197 | 1185 |
276 | 1186 pres_diluent = pres_respiration; |
307 | 1187 if( char_I_const_ppO2 != 0 ) // new in v.101 |
186 | 1188 { |
322 | 1189 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
1190 | |
276 | 1191 pres_diluent -= const_ppO2; // new in v.101 |
1192 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
321 | 1193 if( pres_diluent < 0.0 ) |
1194 pres_diluent = 0.0; | |
276 | 1195 if( pres_diluent > pres_respiration ) // new in v.101 |
1196 pres_diluent = pres_respiration; // new in v.101 | |
307 | 1197 |
321 | 1198 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
322 | 1199 |
326 | 1200 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
322 | 1201 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
1202 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
186 | 1203 } |
307 | 1204 |
310
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1205 if( pres_diluent > ppWater ) // new in v.101 |
116 | 1206 { |
307 | 1207 overlay float EAD, END; |
1208 | |
310
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1209 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1210 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
307 | 1211 |
1212 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
1213 // with plain air. | |
310
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1214 // ppN2 = 79% * (P_EAD - ppWater) |
307 | 1215 // EAD = (P_EAD - Psurface) * 10 |
310
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1216 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
317 | 1217 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
307 | 1218 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
317 | 1219 char_O_EAD = (unsigned char)(EAD + 0.5); |
307 | 1220 |
1221 // END : Equivalent Narcotic Dive. | |
1222 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
1223 // 0.23 btw). Hence the formula becomes: | |
310
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1224 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
317 | 1225 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
307 | 1226 // |
1227 // Source cited: | |
1228 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
1229 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
317 | 1230 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
307 | 1231 if( END < 0.0 || END > 245.5 ) END = 0.0; |
317 | 1232 char_O_END = (unsigned char)(END + 0.5); |
116 | 1233 } |
167 | 1234 else // new in v.101 |
116 | 1235 { |
236 | 1236 ppN2 = 0.0; // new in v.101 |
200 | 1237 ppHe = 0.0; // new in v.101 |
307 | 1238 char_O_EAD = char_O_END = 0; |
116 | 1239 } |
1240 | |
1241 if(!char_I_step_is_1min) | |
192 | 1242 calc_tissue(0); |
116 | 1243 else |
192 | 1244 calc_tissue(1); |
186 | 1245 |
192 | 1246 // Calc limit for surface, ie. GF_high. |
258 | 1247 calc_limit(); |
186 | 1248 |
203 | 1249 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
339 | 1250 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
171 | 1251 } |
1252 | |
116 | 1253 |
167 | 1254 ////////////////////////////////////////////////////////////////////////////// |
169
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1255 // Compute stops. |
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1256 // |
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1257 // Note: because this can be very long, break on 16 iterations, and set state |
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1258 // to 0 when finished, or to 1 when needing to continue. |
334
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1259 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
257
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1260 // break the loop when total time > 512msec. |
169
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1261 // |
116 | 1262 void calc_hauptroutine_calc_deco(void) |
1263 { | |
169
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1264 overlay unsigned char loop; |
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1265 |
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1266 for(loop = 0; loop < 16; ++loop) |
116 | 1267 { |
257
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1268 // Limit loops to 512ms, using the RTC timer 3: |
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1269 if( tmr3() & (512*32) ) |
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1270 break; |
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1271 |
241 | 1272 // Do not ascent while doing a gas switch ? |
203 | 1273 if( sim_gas_delay <= sim_dive_mins ) |
1274 { | |
241 | 1275 if( calc_nextdecodepth() ) |
1276 { | |
1277 if( temp_depth_limit == 0 ) | |
1278 goto Surface; | |
116 | 1279 |
241 | 1280 //---- We hit a stop at temp_depth_limit --------------------- |
317 | 1281 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
241 | 1282 + pres_surface; // To absolute. |
471 | 1283 if( !update_deco_table() ) // Adds a one minute stops. |
1284 goto Surface; // Deco table full: abort... | |
241 | 1285 } |
1286 else | |
1287 { | |
1288 //---- No stop ----------------------------------------------- | |
317 | 1289 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
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1290 |
241 | 1291 //---- Finish computations once surface is reached ----------- |
1292 if( temp_deco <= pres_surface ) | |
1293 { | |
1294 Surface: | |
471 | 1295 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
312
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1296 copy_deco_table(); |
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1297 |
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1298 calc_ascenttime(); |
471 | 1299 char_O_deco_status = 0; // calc nullzeit next time. |
1300 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
241 | 1301 return; |
1302 } | |
1303 } | |
212 | 1304 } |
1305 else | |
334
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1306 { |
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1307 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1308 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
471 | 1309 if( !update_deco_table() ) // Just pass one minute. |
1310 goto Surface; // Deco table full: abort... | |
334
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1311 } |
197 | 1312 |
241 | 1313 //---- Then update tissue -------------------------------------------- |
203 | 1314 sim_dive_mins++; // Advance simulated time by 1 minute. |
241 | 1315 gas_switch_set(); // Apply any simulated gas change, once validated. |
212 | 1316 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
192 | 1317 sim_tissue(1); // Simulate compartiments for 1 minute. |
116 | 1318 } |
169
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1319 |
534
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1320 // Surface not reached, need more stops... for menu animation. |
278 | 1321 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
116 | 1322 } |
1323 | |
167 | 1324 ////////////////////////////////////////////////////////////////////////////// |
169
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1325 // Simulation ascention to first deco stop. |
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1326 // |
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1327 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1328 // there is no need to break on more that 16 iterations |
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1329 // (or we are already in deep shit). |
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1330 // |
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1331 // Input: pres_respiration |
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1332 // Output: temp_deco |
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1333 // |
312
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1334 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1335 // before ascent. |
169
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1336 void sim_ascent_to_first_stop(void) |
116 | 1337 { |
171 | 1338 update_startvalues(); |
169
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1339 clear_deco_table(); |
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1340 |
200 | 1341 temp_deco = pres_respiration; // Starts from current real depth. |
169
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1342 |
312
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1343 // Are we doing the special @+5min variation ? |
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1344 if(char_O_deco_status & 4) |
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1345 sim_extra_time(); |
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1346 |
212 | 1347 // Do we have a gas switch going on ? |
1348 if( sim_gas_delay > sim_dive_mins ) | |
1349 return; | |
1350 | |
241 | 1351 //---- Loop until first stop, gas switch, or surface is reached ---------- |
169
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1352 for(;;) |
116 | 1353 { |
461 | 1354 overlay float old_deco = temp_deco; // Pamb backup (bars) |
460 | 1355 |
241 | 1356 // Try ascending 1 full minute. |
461 | 1357 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. |
1358 if( temp_deco < pres_surface ) // But don't go over surface. | |
1359 temp_deco = pres_surface; | |
203 | 1360 |
461 | 1361 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because |
1362 // one minute passed. | |
212 | 1363 sim_limit(GF_low); |
1364 | |
1365 // Did we reach deepest remaining stop ? | |
241 | 1366 if( temp_deco < sim_lead_tissue_limit ) |
212 | 1367 { |
461 | 1368 temp_deco = old_deco; // Restore last correct depth, |
1369 break; // Do no spend a minute more. | |
212 | 1370 } |
1371 | |
203 | 1372 // Did we reach surface ? |
460 | 1373 // NOTE: we should round BEFORE checking surface is reached. |
461 | 1374 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
1375 if( temp_depth_limit == 0 ) | |
203 | 1376 { |
1377 temp_deco = pres_surface; // Yes: finished ! | |
1378 break; | |
1379 } | |
169
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1380 |
241 | 1381 // Check for gas change below new depth ? |
1382 if( gas_switch_deepest() ) | |
1383 { | |
334
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1384 assert( temp_depth_limit > 0); |
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1385 |
317 | 1386 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
212 | 1387 break; |
241 | 1388 } |
171 | 1389 |
203 | 1390 sim_dive_mins++; // Advance simulated time by 1 minute. |
241 | 1391 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
203 | 1392 sim_tissue(1); // and update tissues for 1 min. |
1393 } | |
167 | 1394 } |
116 | 1395 |
167 | 1396 ////////////////////////////////////////////////////////////////////////////// |
312
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1397 // Simulation extra time at the current depth. |
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1398 // |
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1399 // This routine is used for @+5min feature. |
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1400 void sim_extra_time(void) |
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1401 { |
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1402 overlay unsigned char extra = read_custom_function(58); |
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1403 do { |
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1404 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1405 sim_tissue(1); // and update tissues for 1 min. |
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1406 } while( --extra != 0 ); |
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1407 } |
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1408 |
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1409 ////////////////////////////////////////////////////////////////////////////// |
167 | 1410 // calc_tissue |
1411 // | |
116 | 1412 // optimized in v.101 |
167 | 1413 // |
184 | 1414 static void calc_tissue(PARAMETER unsigned char period) |
116 | 1415 { |
251 | 1416 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1417 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1418 |
338 | 1419 for (ci=0;ci<NUM_COMP;ci++) |
126 | 1420 { |
258 | 1421 read_buhlmann_times(period); // 2 sec or 1 min period. |
116 | 1422 |
126 | 1423 // N2 |
339 | 1424 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
126 | 1425 temp_tissue_safety(); |
339 | 1426 pres_tissue_N2[ci] += temp_tissue; |
165 | 1427 |
126 | 1428 // He |
339 | 1429 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
126 | 1430 temp_tissue_safety(); |
339 | 1431 pres_tissue_He[ci] += temp_tissue; |
192 | 1432 } |
167 | 1433 } |
116 | 1434 |
167 | 1435 ////////////////////////////////////////////////////////////////////////////// |
192 | 1436 // calc_limit |
167 | 1437 // |
192 | 1438 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
167 | 1439 // |
258 | 1440 static void calc_limit(void) |
167 | 1441 { |
192 | 1442 char_O_gtissue_no = 255; |
1443 calc_lead_tissue_limit = 0.0; | |
1444 | |
338 | 1445 for(ci=0; ci<NUM_COMP;ci++) |
192 | 1446 { |
339 | 1447 overlay float N2 = pres_tissue_N2[ci]; |
1448 overlay float He = pres_tissue_He[ci]; | |
293
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1449 overlay float p = N2 + He; |
192 | 1450 |
258 | 1451 read_buhlmann_coefficients(); |
293
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1452 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1453 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
116 | 1454 |
192 | 1455 // Apply the Eric Baker's varying gradient factor correction. |
1456 // Note: the correction factor depends both on GF and b, | |
1457 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1458 // so that can change who is the leading gas... | |
1459 // Note: Also depends of the GF. So the calcul is different for | |
1460 // GF_low, current GF, or GF_high... | |
1461 // *BUT* calc_tissue() is used to compute bottom time, | |
1462 // hence what would happend at surface, | |
1463 // hence at GF_high. | |
509 | 1464 if( char_I_deco_model != 0 ) |
258 | 1465 p = ( p - var_N2_a * GF_high) * var_N2_b |
1466 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
192 | 1467 else |
1468 p = (p - var_N2_a) * var_N2_b; | |
258 | 1469 if( p < 0.0 ) p = 0.0; |
192 | 1470 |
1471 if( p > calc_lead_tissue_limit ) | |
1472 { | |
1473 char_O_gtissue_no = ci; | |
1474 calc_lead_tissue_limit = p; | |
1475 } | |
1476 } | |
197 | 1477 |
338 | 1478 assert( char_O_gtissue_no < NUM_COMP ); |
197 | 1479 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
167 | 1480 } |
1481 | |
1482 ////////////////////////////////////////////////////////////////////////////// | |
1483 // calc_nullzeit | |
1484 // | |
1485 // calculates the remaining bottom time | |
1486 // | |
511
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1487 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second |
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1488 // exponential term to the M-value equation, making it impossible to |
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1489 // invert... So we have to make a fast-simu until we find a better way. |
509 | 1490 // |
1491 // Input: pres_respiration | |
1492 // Output: char_O_nullzeit | |
167 | 1493 // |
1494 static void calc_nullzeit(void) | |
1495 { | |
511
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1496 //---- Compute ppN2 and ppHe --------------------------------------------- |
509 | 1497 temp_deco = pres_respiration; |
1498 sim_alveolar_presures(); | |
167 | 1499 |
509 | 1500 char_O_nullzeit = 240; |
1501 for(ci=0; ci<NUM_COMP; ci++) | |
1502 { | |
511
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1503 //---- Read A/B values and loading factor for N2 and He -------------- |
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1504 overlay float tN2 = pres_tissue_N2[ci]; |
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1505 overlay float tHe = pres_tissue_He[ci]; |
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1506 overlay float t = tN2 + tHe; |
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1507 overlay unsigned char ndl; |
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1508 overlay unsigned char period = 10; |
192 | 1509 |
509 | 1510 read_buhlmann_coefficients(); |
511
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1511 read_buhlmann_times(2); // Starts with a 10min period. |
509 | 1512 |
511
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1513 //---- Simulate for that tissue -------------------------------------- |
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1514 // NOTE: No need to simulate for longuer than the already found NDL. |
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1515 for(ndl=0; ndl<char_O_nullzeit;) |
509 | 1516 { |
511
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1517 //---- Compute updated mix M-value at surface |
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1518 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; |
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1519 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; |
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1520 overlay float M0 = (a + pres_surface/b); |
116 | 1521 |
511
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1522 //---- Add 10min/1min to N2/He tissues |
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1523 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; |
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1524 overlay float dTHe = (ppHe - tHe) * var_He_e; |
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1525 |
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1526 //---- Apply security margin when using the non-GF model |
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1527 if( char_I_deco_model == 0 ) |
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1528 { |
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1529 dTN2 *= float_saturation_multiplier; |
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1530 dTHe *= float_saturation_multiplier; |
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1531 } |
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1532 else // Or GF-based model |
509 | 1533 M0 = GF_high * (M0 - pres_surface) + pres_surface; |
167 | 1534 |
511
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1535 //---- Simulate off-gasing while going to surface |
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1536 // TODO ! |
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1537 // dTN2 -= exp( ... ascent time ... ppN2...) |
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1538 // dTHe -= exp( ... ascent time ... ppHe...) |
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1539 |
534
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1540 //---- Ok now, and still ok to surface after 1 or 10 minutes ? |
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1541 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) |
509 | 1542 { |
511
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1543 tN2 += dTN2; // YES: apply gas loadings, |
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1544 tHe += dTHe; |
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1545 t = tN2 + tHe; |
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1546 ndl += period; // increment NDL, |
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1547 continue; // and loop. |
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1548 } |
116 | 1549 |
511
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1550 //---- Should we retry with smaller steps ? |
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1551 if( period == 10 ) |
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1552 { |
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1553 read_buhlmann_times(1); // 1min coefs. |
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1554 period = 1; |
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1555 continue; |
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1556 } |
167 | 1557 |
511
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1558 //---- ELSE make a linear approx for the last minute |
524 | 1559 // Usefull to have a meaningfull rounding of NDL. |
1560 // But ONLY it positive (negativ casted to unsigned is bad). | |
1561 if( M0 > t ) | |
1562 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
511
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1563 break; |
509 | 1564 } |
511
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1565 |
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1566 // Keep the shortest NDL found |
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1567 if( ndl < char_O_nullzeit ) |
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1568 char_O_nullzeit = ndl; |
339 | 1569 } |
167 | 1570 } |
116 | 1571 |
167 | 1572 ////////////////////////////////////////////////////////////////////////////// |
1573 // calc_ascenttime | |
1574 // | |
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1575 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1576 // and all stops. |
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1577 // |
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1578 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
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1579 static void calc_ascenttime(void) |
116 | 1580 { |
323 | 1581 overlay unsigned char x; |
1582 overlay unsigned short sum; | |
168 | 1583 |
323 | 1584 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
1585 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
1586 if (ascent < 0.0) | |
1587 ascent = 0.0; | |
1588 sum = (unsigned short)(ascent + 0.99); | |
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1589 |
338 | 1590 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
323 | 1591 sum += (unsigned short)internal_deco_time[x]; |
1592 | |
1593 if( char_O_deco_status == 1 ) | |
1594 int_O_ascenttime = sum; | |
126 | 1595 else |
323 | 1596 int_O_extra_ascenttime = sum; |
167 | 1597 } |
116 | 1598 |
167 | 1599 ////////////////////////////////////////////////////////////////////////////// |
1600 // update_startvalues | |
1601 // | |
116 | 1602 // updated in v.102 |
167 | 1603 // |
116 | 1604 void update_startvalues(void) |
1605 { | |
167 | 1606 overlay unsigned char x; |
116 | 1607 |
201 | 1608 // Start ascent simulation with current tissue partial pressures. |
339 | 1609 for(x=0; x<NUM_COMP; x++) |
116 | 1610 { |
339 | 1611 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
1612 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
116 | 1613 } |
197 | 1614 |
201 | 1615 // No leading tissue (yet) for this ascent simulation. |
197 | 1616 sim_lead_tissue_limit = 0.0; |
1617 sim_lead_tissue_no = 255; | |
167 | 1618 } |
116 | 1619 |
167 | 1620 ////////////////////////////////////////////////////////////////////////////// |
192 | 1621 // sim_tissue |
167 | 1622 // |
116 | 1623 // optimized in v.101 |
167 | 1624 // |
1625 // Function very simular to calc_tissue, but: | |
1626 // + Use a 1min or 10min period. | |
1627 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
184 | 1628 static void sim_tissue(PARAMETER unsigned char period) |
116 | 1629 { |
251 | 1630 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1631 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1632 |
338 | 1633 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1634 { |
258 | 1635 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
165 | 1636 |
126 | 1637 // N2 |
339 | 1638 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
126 | 1639 temp_tissue_safety(); |
339 | 1640 sim_pres_tissue_N2[ci] += temp_tissue; |
126 | 1641 |
1642 // He | |
339 | 1643 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
126 | 1644 temp_tissue_safety(); |
339 | 1645 sim_pres_tissue_He[ci] += temp_tissue; |
192 | 1646 } |
167 | 1647 } |
116 | 1648 |
167 | 1649 ////////////////////////////////////////////////////////////////////////////// |
192 | 1650 // sim_limit() |
1651 // | |
1652 // New in v.111 | |
1653 // | |
1654 // Function separated from sim_tissue() to allow recomputing limit on | |
1655 // different depth, because it depends on current gradient factor. | |
167 | 1656 // |
192 | 1657 static void sim_limit(PARAMETER float GF_current) |
116 | 1658 { |
212 | 1659 assert( 0.0 < GF_current && GF_current <= 1.0f); |
1660 | |
192 | 1661 sim_lead_tissue_limit = 0.0; |
212 | 1662 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
192 | 1663 |
338 | 1664 for(ci=0; ci<NUM_COMP; ci++) |
192 | 1665 { |
339 | 1666 overlay float N2 = sim_pres_tissue_N2[ci]; |
1667 overlay float He = sim_pres_tissue_He[ci]; | |
241 | 1668 overlay float p = N2 + He; |
192 | 1669 |
258 | 1670 read_buhlmann_coefficients(); |
241 | 1671 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
1672 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
192 | 1673 |
1674 // Apply the Eric Baker's varying gradient factor correction. | |
1675 // Note: the correction factor depends both on GF and b, | |
1676 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1677 // so that can change who is the leading gas... | |
1678 // Note: Also depends of the GF_current... | |
509 | 1679 if( char_I_deco_model != 0 ) |
302 | 1680 p = ( p - var_N2_a * GF_current) |
1681 / (GF_current / var_N2_b + 1.0 - GF_current); | |
192 | 1682 else |
1683 p = (p - var_N2_a) * var_N2_b; | |
1684 | |
1685 if( p > sim_lead_tissue_limit ) | |
1686 { | |
1687 sim_lead_tissue_no = ci; | |
1688 sim_lead_tissue_limit = p; | |
1689 } | |
1690 } // for ci | |
197 | 1691 |
338 | 1692 assert( sim_lead_tissue_no < NUM_COMP ); |
237 | 1693 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
167 | 1694 } |
116 | 1695 |
167 | 1696 ////////////////////////////////////////////////////////////////////////////// |
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1697 // clear_deco_table |
167 | 1698 // |
1699 // unchanged in v.101 | |
1700 // | |
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1701 static void clear_deco_table(void) |
116 | 1702 { |
169
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1703 overlay unsigned char x; |
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1704 |
338 | 1705 for(x=0; x<NUM_STOPS; ++x) |
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1706 { |
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1707 internal_deco_time [x] = 0; |
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1708 internal_deco_depth[x] = 0; |
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1709 } |
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1710 } |
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1711 |
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1712 ////////////////////////////////////////////////////////////////////////////// |
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1713 // update_deco_table |
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1714 // |
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1715 // Add 1 min to current stop. |
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1716 // |
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1717 // Inputs: |
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1718 // temp_depth_limit = stop's depth, in meters. |
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1719 // In/Out: |
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1720 // internal_deco_depth[] : depth (in metres) of each stops. |
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1721 // internal_deco_time [] : time (in minutes) of each stops. |
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1722 // |
471 | 1723 static unsigned char update_deco_table() |
169
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1724 { |
192 | 1725 overlay unsigned char x; |
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1726 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1727 assert( temp_depth_limit > 0 ); // No stop at surface... |
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1728 |
338 | 1729 for(x=0; x<NUM_STOPS; ++x) |
192 | 1730 { |
212 | 1731 // Make sure deco-stops are recorded in order: |
334
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1732 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
212 | 1733 |
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1734 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
192 | 1735 { |
1736 // Do not overflow (max 255') | |
1737 if( internal_deco_time[x] < 255 ) | |
1738 { | |
1739 internal_deco_time[x]++; | |
471 | 1740 return 1; |
192 | 1741 } |
1742 // But store extra in the next stop... | |
169
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1743 } |
192 | 1744 |
169
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1745 if( internal_deco_depth[x] == 0 ) |
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1746 { |
192 | 1747 internal_deco_depth[x] = temp_depth_limit; |
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1748 if( sim_gas_delay >= sim_dive_mins ) |
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1749 internal_deco_depth[x] |= 0x80; |
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1750 |
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1751 internal_deco_time[x] = 1; |
471 | 1752 return 1; |
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1753 } |
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1754 } |
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1755 |
192 | 1756 // Can't store stops at more than 96m. |
1757 // Or stops at less that 3m too. | |
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1758 // Just do nothing with that... |
471 | 1759 return 0; |
167 | 1760 } |
116 | 1761 |
167 | 1762 ////////////////////////////////////////////////////////////////////////////// |
1763 // calc_gradient_factor | |
1764 // | |
165 | 1765 // optimized in v.101 (var_N2_a) |
116 | 1766 // new code in v.102 |
167 | 1767 // |
1768 static void calc_gradient_factor(void) | |
116 | 1769 { |
197 | 1770 overlay float gf; |
339 | 1771 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
1772 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
237 | 1773 |
338 | 1774 assert( char_O_gtissue_no < NUM_COMP ); |
237 | 1775 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
197 | 1776 |
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1777 // tissue > respiration (currently off-gasing) |
302 | 1778 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
1779 // GF = 100% when respiration == limit. | |
293
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1780 temp_tissue = N2 + He; |
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1781 if( temp_tissue <= pres_respiration ) |
197 | 1782 gf = 0.0; |
1783 else | |
1784 { | |
293
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1785 overlay float limit = calc_lead_tissue_limit; |
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1786 // NOTE: in GF model, calc_lead_tissue_limit include already the |
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1787 // correction due to gradient factor. To compute the actual |
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1788 // current GF, we need to (re-)compute the raw ambiant-pressure |
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1789 // limit from the Bühlmann model. |
509 | 1790 if( char_I_deco_model != 0 ) |
293
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1791 { |
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1792 ci = char_O_gtissue_no; |
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1793 read_buhlmann_coefficients(); |
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1794 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1795 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1796 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1797 } |
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1798 |
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1799 gf = (temp_tissue - pres_respiration) |
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1800 / (temp_tissue - limit) |
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1801 * 100.0; |
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1802 if( gf > 254.5 ) gf = 255.0; |
197 | 1803 if( gf < 0.0 ) gf = 0.0; |
1804 } | |
293
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1805 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
116 | 1806 |
509 | 1807 if( char_I_deco_model != 0 ) // calculate relative gradient factor |
116 | 1808 { |
197 | 1809 overlay float rgf; |
1810 | |
562 | 1811 if( low_depth < 3 ) |
197 | 1812 rgf = GF_high; |
1813 else | |
1814 { | |
317 | 1815 overlay float temp1 = low_depth * METER_TO_BAR; |
197 | 1816 overlay float temp2 = pres_respiration - pres_surface; |
186 | 1817 |
197 | 1818 if (temp2 <= 0) |
1819 rgf = GF_high; | |
1820 else if (temp2 >= temp1) | |
1821 rgf = GF_low; | |
1822 else | |
1823 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
1824 } | |
186 | 1825 |
197 | 1826 rgf = gf / rgf; // gf is already in percent |
1827 if( rgf < 0.0 ) rgf = 0.0; | |
293
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1828 if( rgf > 254.5 ) rgf = 255.0; |
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1829 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
116 | 1830 } // calc relative gradient factor |
1831 else | |
1832 { | |
186 | 1833 char_O_relative_gradient_GF = char_O_gradient_factor; |
116 | 1834 } |
167 | 1835 } |
116 | 1836 |
167 | 1837 ////////////////////////////////////////////////////////////////////////////// |
1838 // deco_calc_desaturation_time | |
1839 // | |
116 | 1840 // FIXED N2_ratio |
1841 // unchanged in v.101 | |
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1842 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
233 | 1843 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
167 | 1844 // |
116 | 1845 void deco_calc_desaturation_time(void) |
1846 { | |
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1847 RESET_C_STACK |
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1848 |
233 | 1849 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1850 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1851 | |
237 | 1852 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
233 | 1853 pres_surface = int_I_pres_surface * 0.001; |
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1854 ppN2 = N2_ratio * (pres_surface - ppWater); |
126 | 1855 int_O_desaturation_time = 0; |
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1856 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
233 | 1857 |
339 | 1858 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1859 { |
251 | 1860 overlay unsigned short desat_time; // For a particular compartiment, in min. |
1861 overlay float temp1; | |
1862 overlay float temp2; | |
1863 overlay float temp3; | |
1864 overlay float temp4; | |
338 | 1865 |
509 | 1866 read_buhlmann_ht(); |
338 | 1867 |
126 | 1868 // saturation_time (for flight) and N2_saturation in multiples of halftime |
1869 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
1870 // 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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1871 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
126 | 1872 // N2 |
339 | 1873 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
1874 temp2 = ppN2 - pres_tissue_N2[ci]; | |
126 | 1875 if (temp2 >= 0.0) |
233 | 1876 temp1 = 0.0; |
126 | 1877 else |
1878 temp1 = temp1 / temp2; | |
601
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1879 |
251 | 1880 if( 0.0 < temp1 && temp1 < 1.0 ) |
126 | 1881 { |
260
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1882 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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1883 // minus because log is negative. |
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1884 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
509 | 1885 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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1886 |
126 | 1887 } |
1888 else | |
1889 { | |
233 | 1890 temp1 = 0.0; |
1891 temp2 = 0.0; | |
126 | 1892 } |
116 | 1893 |
126 | 1894 // He |
339 | 1895 temp3 = 0.1 - pres_tissue_He[ci]; |
126 | 1896 if (temp3 >= 0.0) |
233 | 1897 temp3 = 0.0; |
126 | 1898 else |
339 | 1899 temp3 = - temp3 / pres_tissue_He[ci]; |
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1900 |
251 | 1901 if( 0.0 < temp3 && temp3 < 1.0 ) |
126 | 1902 { |
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1903 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
126 | 1904 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
1905 // minus because log is negative | |
509 | 1906 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
126 | 1907 } |
1908 else | |
1909 { | |
233 | 1910 temp3 = 0.0; |
1911 temp4 = 0.0; | |
126 | 1912 } |
116 | 1913 |
126 | 1914 // saturation_time (for flight) |
1915 if (temp4 > temp2) | |
203 | 1916 desat_time = (unsigned short)temp4; |
126 | 1917 else |
203 | 1918 desat_time = (unsigned short)temp2; |
252 | 1919 |
251 | 1920 if(desat_time > int_O_desaturation_time) |
1921 int_O_desaturation_time = desat_time; | |
116 | 1922 |
126 | 1923 // N2 saturation in multiples of halftime for display purposes |
339 | 1924 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1925 temp2 = temp2 + 80.0; // set center | |
126 | 1926 if (temp2 < 0.0) |
1927 temp2 = 0.0; | |
1928 if (temp2 > 255.0) | |
1929 temp2 = 255.0; | |
339 | 1930 char_O_tissue_N2_saturation[ci] = (char)temp2; |
233 | 1931 |
126 | 1932 // He saturation in multiples of halftime for display purposes |
339 | 1933 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1934 temp4 = temp4 + 80.0; // set center | |
126 | 1935 if (temp4 < 0.0) |
1936 temp4 = 0.0; | |
1937 if (temp4 > 255.0) | |
1938 temp4 = 255.0; | |
339 | 1939 char_O_tissue_He_saturation[ci] = (char)temp4; |
126 | 1940 } // for |
167 | 1941 } |
116 | 1942 |
167 | 1943 ////////////////////////////////////////////////////////////////////////////// |
1944 // calc_wo_deco_step_1_min | |
1945 // | |
116 | 1946 // FIXED N2 Ratio |
1947 // optimized in v.101 (...saturation_multiplier) | |
1948 // desaturation slowed down to 70,42% | |
167 | 1949 // |
1950 static void calc_wo_deco_step_1_min(void) | |
116 | 1951 { |
251 | 1952 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1953 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
1954 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
1955 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1956 | |
126 | 1957 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
368 | 1958 pres_respiration = pres_surface = int_I_pres_surface * 0.001; |
1959 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
200 | 1960 ppHe = 0.0; |
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1961 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
197 | 1962 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
126 | 1963 |
339 | 1964 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
167 | 1965 |
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1966 clear_deco_table(); |
200 | 1967 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
126 | 1968 char_O_nullzeit = 0; |
168 | 1969 int_O_ascenttime = 0; |
323 | 1970 int_O_extra_ascenttime = 0; |
126 | 1971 calc_gradient_factor(); |
167 | 1972 } |
126 | 1973 |
167 | 1974 ////////////////////////////////////////////////////////////////////////////// |
368 | 1975 // calc_dive_interval |
1976 // | |
1977 // Prepare tissue for delay before the next dive simulation. | |
1978 // | |
1979 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
1980 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
1981 // | |
1982 // Should be protected by deco_push_tissues_to_vault(), | |
1983 // deco_pull_tissues_from_vault() | |
1984 // | |
1985 // desaturation slowed down to 70,42%. | |
1986 // | |
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1987 static void calc_dive_interval(void) |
368 | 1988 { |
1989 overlay unsigned char t; | |
491
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1990 overlay unsigned char backup_model; |
368 | 1991 |
1992 //---- Initialize simulation parameters ---------------------------------- | |
1993 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
1994 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
1995 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
1996 ppHe = 0.0; | |
491
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1997 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
368 | 1998 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
1999 | |
568 | 2000 // Make sure SURFACE_DESAT_FACTOR is applied: |
491
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2001 backup_model = char_I_deco_model; |
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2002 char_I_deco_model = 0; |
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2003 |
368 | 2004 //---- Perform simulation ------------------------------------------------ |
2005 for(t=0; t<char_I_dive_interval; ++t) | |
2006 { | |
2007 calc_tissue(2); // period = 10min. | |
2008 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
2009 } | |
514 | 2010 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
2011 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); | |
491
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2012 |
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2013 //---- Restore model ----------------------------------------------------- |
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2014 char_I_deco_model = backup_model; |
368 | 2015 } |
2016 | |
2017 ////////////////////////////////////////////////////////////////////////////// | |
167 | 2018 ////////////////////////////////////////////////////////////////////////////// |
2019 ////////////////////////////////// deco_hash ///////////////////////////////// | |
2020 ////////////////////////////////////////////////////////////////////////////// | |
2021 ////////////////////////////////////////////////////////////////////////////// | |
126 | 2022 |
184 | 2023 #ifndef CROSS_COMPILE |
116 | 2024 void deco_hash(void) |
2025 { | |
167 | 2026 overlay unsigned char md_i, md_j; // Loop index. |
2027 overlay unsigned char md_t; | |
2028 overlay unsigned char md_buffer[16]; | |
2029 overlay unsigned char md_temp; | |
203 | 2030 overlay unsigned short md_pointer; |
167 | 2031 |
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2032 RESET_C_STACK |
126 | 2033 |
2034 // init | |
164 | 2035 for(md_i=0;md_i<16;md_i++) |
126 | 2036 { |
2037 md_state[md_i] = 0; | |
164 | 2038 char_O_hash[md_i] = 0; |
126 | 2039 } // for md_i 16 |
116 | 2040 |
126 | 2041 _asm |
167 | 2042 movlw 0x01 // md_pi address. |
2043 movwf TBLPTRU,0 | |
2044 movlw 0x7E | |
2045 movwf TBLPTRH,0 | |
2046 movlw 0x00 | |
2047 movwf TBLPTRL,0 | |
126 | 2048 _endasm; |
165 | 2049 md_i = 0; |
2050 do { | |
126 | 2051 _asm |
2052 TBLRDPOSTINC | |
2053 movff TABLAT,md_temp | |
2054 _endasm | |
165 | 2055 md_pi_subst[md_i++] = md_temp; |
2056 } while( md_i != 0 ); | |
2057 | |
126 | 2058 _asm |
167 | 2059 movlw 0x00 |
2060 movwf TBLPTRU,0 | |
2061 movlw 0x00 | |
2062 movwf TBLPTRH,0 | |
2063 movlw 0x00 | |
2064 movwf TBLPTRL,0 | |
126 | 2065 _endasm |
167 | 2066 |
126 | 2067 // cycle buffers |
2068 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
2069 { | |
2070 md_t = 0; | |
2071 for (md_i=0;md_i<16;md_i++) | |
2072 { | |
2073 if(md_pointer == 9) | |
164 | 2074 md_temp = char_O_hash[md_i]; |
126 | 2075 else |
2076 { | |
2077 _asm | |
167 | 2078 TBLRDPOSTINC |
2079 movff TABLAT,md_temp | |
126 | 2080 _endasm |
2081 } // else | |
167 | 2082 |
2083 md_buffer[md_i] = md_temp; | |
186 | 2084 md_state[md_i+16] = md_temp; |
2085 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
126 | 2086 } // for md_i 16 |
2087 | |
2088 for (md_i=0;md_i<18;md_i++) | |
2089 { | |
2090 for (md_j=0;md_j<48;md_j++) | |
2091 { | |
167 | 2092 md_state[md_j] ^= md_pi_subst[md_t]; |
126 | 2093 md_t = md_state[md_j]; |
2094 } // for md_j 48 | |
2095 md_t = (unsigned char)(md_t+1); | |
2096 } // for md_i 18 | |
164 | 2097 md_t = char_O_hash[15]; |
126 | 2098 |
2099 for (md_i=0;md_i<16;md_i++) | |
2100 { | |
167 | 2101 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
164 | 2102 md_t = char_O_hash[md_i]; |
126 | 2103 } // for md_i 16 |
2104 } // for md_pointer | |
116 | 2105 } // void deco_hash(void) |
184 | 2106 #endif |
116 | 2107 |
167 | 2108 ////////////////////////////////////////////////////////////////////////////// |
2109 // deco_clear_CNS_fraction | |
2110 // | |
116 | 2111 // new in v.101 |
167 | 2112 // |
116 | 2113 void deco_clear_CNS_fraction(void) |
2114 { | |
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2115 RESET_C_STACK |
237 | 2116 |
126 | 2117 CNS_fraction = 0.0; |
2118 char_O_CNS_fraction = 0; | |
167 | 2119 } |
116 | 2120 |
167 | 2121 ////////////////////////////////////////////////////////////////////////////// |
2122 // deco_calc_CNS_fraction | |
2123 // | |
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2124 // Input: char_I_actual_ppO2 : Current condition (in decibars). |
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2125 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. |
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2126 // CNS_fraction : velue before period. |
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2127 // Output: CNS_fraction, char_O_CNS_fraction |
167 | 2128 // |
116 | 2129 void deco_calc_CNS_fraction(void) |
2130 { | |
292 | 2131 overlay float time_factor = 1.0f; |
126 | 2132 RESET_C_STACK |
167 | 2133 |
471 | 2134 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2135 assert( char_I_actual_ppO2 > 15 ); |
2136 | |
439
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2137 if( char_I_step_is_1min == 1 ) |
292 | 2138 time_factor = 30.0f; |
439
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2139 else if( char_I_step_is_1min == 2 ) |
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2140 time_factor = 300.0f; |
116 | 2141 |
126 | 2142 if (char_I_actual_ppO2 < 50) |
292 | 2143 ; // no changes |
126 | 2144 else if (char_I_actual_ppO2 < 60) |
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2145 CNS_fraction += time_factor/(-540.0 * char_I_actual_ppO2 + 54000.0); |
126 | 2146 else if (char_I_actual_ppO2 < 70) |
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2147 CNS_fraction += time_factor/(-450.0 * char_I_actual_ppO2 + 48600.0); |
126 | 2148 else if (char_I_actual_ppO2 < 80) |
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2149 CNS_fraction += time_factor/(-360.0 * char_I_actual_ppO2 + 42300.0); |
126 | 2150 else if (char_I_actual_ppO2 < 90) |
439
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2151 CNS_fraction += time_factor/(-270.0 * char_I_actual_ppO2 + 35100.0); |
126 | 2152 else if (char_I_actual_ppO2 < 110) |
439
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2153 CNS_fraction += time_factor/(-180.0 * char_I_actual_ppO2 + 27000.0); |
126 | 2154 else if (char_I_actual_ppO2 < 150) |
439
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2155 CNS_fraction += time_factor/( -90.0 * char_I_actual_ppO2 + 17100.0); |
126 | 2156 else if (char_I_actual_ppO2 < 160) |
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2157 CNS_fraction += time_factor/(-225.0 * char_I_actual_ppO2 + 37350.0); |
126 | 2158 else if (char_I_actual_ppO2 < 165) |
292 | 2159 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 | 2160 else if (char_I_actual_ppO2 < 170) |
292 | 2161 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
126 | 2162 else if (char_I_actual_ppO2 < 175) |
292 | 2163 CNS_fraction += time_factor*0.00136; |
126 | 2164 else if (char_I_actual_ppO2 < 180) |
292 | 2165 CNS_fraction += time_factor*0.00180; |
126 | 2166 else if (char_I_actual_ppO2 < 185) |
292 | 2167 CNS_fraction += time_factor*0.00237; |
126 | 2168 else if (char_I_actual_ppO2 < 190) |
292 | 2169 CNS_fraction += time_factor*0.00310; |
126 | 2170 else if (char_I_actual_ppO2 < 195) |
292 | 2171 CNS_fraction += time_factor*0.00401; |
126 | 2172 else if (char_I_actual_ppO2 < 200) |
292 | 2173 CNS_fraction += time_factor*0.00517; |
126 | 2174 else if (char_I_actual_ppO2 < 230) |
292 | 2175 CNS_fraction += time_factor*0.0209; |
126 | 2176 else |
292 | 2177 CNS_fraction += time_factor*0.0482; // value for 2.5 |
116 | 2178 |
514 | 2179 if( CNS_fraction > 2.5 ) |
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2180 CNS_fraction = 2.55; |
514 | 2181 if( CNS_fraction < 0.0 ) |
126 | 2182 CNS_fraction = 0.0; |
2183 | |
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2184 char_O_CNS_fraction = (unsigned char)(100.0 * CNS_fraction + 0.5); |
167 | 2185 } |
116 | 2186 |
167 | 2187 ////////////////////////////////////////////////////////////////////////////// |
439
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2188 // deco_calc_CNS_planning |
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2189 // |
511
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2190 // Compute CNS during predicted ascent. |
488 | 2191 // |
2192 // Note: Needs a call to deco_push_tissues_to_vault(), | |
2193 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
2194 // | |
2195 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
2196 // Output: CNS_fraction, char_O_CNS_fraction | |
2197 // | |
439
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2198 void deco_calc_CNS_planning(void) |
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2199 { |
490
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2200 overlay unsigned char backup_gas_last_depth; |
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2201 overlay unsigned char backup_gas_last_used; |
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2202 overlay unsigned short backup_gas_delay; |
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2203 overlay unsigned short backup_dive_mins; |
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2204 overlay unsigned char backup_actual_ppO2; |
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2205 |
439
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2206 RESET_C_STACK |
490
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2207 |
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2208 // Backup state machine |
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2209 backup_gas_last_depth = sim_gas_last_depth; |
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2210 backup_gas_last_used = sim_gas_last_used; |
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2211 backup_gas_delay = sim_gas_delay; |
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2212 backup_dive_mins = sim_dive_mins; |
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2213 backup_actual_ppO2 = char_I_actual_ppO2; |
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2214 |
439
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2215 // Uses 1min CNS period: |
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2216 char_I_step_is_1min = 1; |
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2217 |
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2218 //---- Retrieve bottom Gas used, and set variables. |
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2219 sim_gas_last_used = char_I_first_gas; |
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2220 sim_gas_last_depth = 0; // Surface gas marker. |
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2221 gas_switch_set(); // Sets initial calc_N2/He_ratio |
439
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2222 |
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2223 //---- CCR mode : do the full TTS at once -------------------------------- |
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2224 if( char_I_const_ppO2 != 0 ) |
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2225 { |
443
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2226 overlay unsigned short t; // Needs 16bits here ! |
439
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2227 char_I_actual_ppO2 = char_I_const_ppO2; |
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2228 for(t=0; t<int_O_ascenttime; ++t) |
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2229 deco_calc_CNS_fraction(); |
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2230 } |
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2231 else //---- OC mode : have to follow all gas switches... ----------------- |
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2232 { |
443
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2233 overlay unsigned char i = 0; // Decostop loop counter |
439
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2234 overlay float actual_ppO2; |
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2235 overlay unsigned char time, t; |
563 | 2236 overlay unsigned char deepest_first = (read_custom_function(54) == 0); |
439
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2237 |
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2238 //---- Ascent to surface delay |
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2239 // NOTE: count as if time is spent with bottom pressure, |
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2240 // AND the bottom gas |
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2241 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) |
439
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2242 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2243 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2244 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2245 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2246 |
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2247 // Ascent time (rounded up): |
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2248 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); |
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2249 |
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2250 for(t=0; t<time; ++t) |
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2251 { |
439
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2252 deco_calc_CNS_fraction(); |
490
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2253 sim_dive_mins++; |
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2254 } |
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2255 |
563 | 2256 //---- Do all further stops ------------------------------------------ |
439
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2257 for(i=0; i<NUM_STOPS; ++i) |
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2258 { |
563 | 2259 overlay unsigned char switch_gas; |
2260 | |
2261 //---- Get next stop, possibly in reverse order ------------------ | |
2262 if( deepest_first ) | |
2263 { | |
2264 time = char_O_deco_time[i]; | |
2265 temp_depth_limit = char_O_deco_depth[i]; | |
2266 } | |
2267 else | |
2268 { | |
2269 time = char_O_deco_time[(NUM_STOPS-1)-i]; | |
2270 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i]; | |
2271 } | |
2272 if( time == 0 ) continue; | |
439
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2273 |
563 | 2274 //---- Gas Switch ? ---------------------------------------------- |
2275 switch_gas = temp_depth_limit & 0x80; // Switch flag. | |
2276 temp_depth_limit &= 0x7F; // True stop depth. | |
2277 | |
2278 if( switch_gas ) | |
2279 { | |
2280 gas_switch_deepest(); | |
2281 gas_switch_set(); | |
2282 } | |
2283 | |
2284 //---- Convert Depth and N2_ratio to ppO2 ------------------------ | |
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2285 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) |
439
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2286 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2287 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2288 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2289 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2290 |
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2291 //---- Apply the stop |
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2292 for(t=0; t<time; ++t) |
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2293 { |
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2294 deco_calc_CNS_fraction(); |
490
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2295 sim_dive_mins++; |
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2296 } |
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2297 } |
488 | 2298 } |
2299 | |
563 | 2300 //---- Back to normal mode... -------------------------------------------- |
488 | 2301 char_I_step_is_1min = 0; |
490
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2302 sim_gas_last_depth = backup_gas_last_depth; |
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2303 sim_gas_last_used = backup_gas_last_used; |
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2304 sim_gas_delay = backup_gas_delay; |
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2305 sim_dive_mins = backup_dive_mins; |
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2306 char_I_actual_ppO2 = backup_actual_ppO2; |
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2307 } |
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2308 |
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2309 ////////////////////////////////////////////////////////////////////////////// |
167 | 2310 // deco_calc_CNS_decrease_15min |
2311 // | |
116 | 2312 // new in v.101 |
167 | 2313 // |
116 | 2314 // calculates the half time of 90 minutes in 6 steps of 15 min |
200 | 2315 // (Used in sleepmode, for low battery mode). |
167 | 2316 // |
116 | 2317 // Output: char_O_CNS_fraction |
2318 // Uses and Updates: CNS_fraction | |
167 | 2319 // |
116 | 2320 void deco_calc_CNS_decrease_15min(void) |
2321 { | |
237 | 2322 RESET_C_STACK |
514 | 2323 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2324 |
126 | 2325 CNS_fraction = 0.890899 * CNS_fraction; |
514 | 2326 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
167 | 2327 } |
116 | 2328 |
167 | 2329 ////////////////////////////////////////////////////////////////////////////// |
2330 // deco_calc_percentage | |
2331 // | |
116 | 2332 // new in v.101 |
167 | 2333 // |
116 | 2334 // calculates int_I_temp * char_I_temp / 100 |
2335 // output is int_I_temp | |
200 | 2336 // |
2337 // Used to compute NoFly remaining time. | |
222
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2338 // |
116 | 2339 void deco_calc_percentage(void) |
2340 { | |
122
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2341 RESET_C_STACK |
222
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2342 |
237 | 2343 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
564 | 2344 assert( int_I_temp < 5760 ); // Less than 4 days = 96h... |
237 | 2345 |
222
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2346 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
237 | 2347 |
554
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2348 assert( int_I_temp < 5760 ); // Less than 96h too... |
222
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2349 } |
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2350 |
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2351 |
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2352 ////////////////////////////////////////////////////////////////////////////// |
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2353 // deco_gas_volumes |
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2354 // |
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2355 // new in v.111 |
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2356 // |
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2357 // calculates volumes for each gas. |
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2358 // |
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2359 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
240
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2360 // Gas list. |
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2361 // char_I_first_gas is the bottom gas. |
222
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2362 // decoplan (char_O_deco_depth, char_O_deco_time). |
234
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2363 // CF#54 == TRUE if shallowest stop first. |
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2364 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min. |
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2365 // CF#57 == deco liters/minutes (5 .. 50) or bar/min. |
224 | 2366 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
222
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2367 // |
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2368 void deco_gas_volumes(void) |
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2369 { |
338 | 2370 overlay float volumes[NUM_GAS]; |
478
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2371 overlay float bottom_usage, deco_usage; |
234
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2372 overlay unsigned char i, deepest_first; |
646 | 2373 overlay unsigned char gas, depth; |
222
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2374 RESET_C_STACK |
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2375 |
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2376 //---- initialize with bottom consumption -------------------------------- |
338 | 2377 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
240
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2378 volumes[i] = 0.0; |
222
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2379 |
338 | 2380 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
241 | 2381 gas = char_I_first_gas - 1; |
2382 | |
478
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2383 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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|
2384 if( char_I_const_ppO2 == 0 && bottom_usage > 0.0 ) |
265 | 2385 volumes[gas] |
2386 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
2387 * char_I_bottom_time // in minutes. | |
2388 * bottom_usage; // In liter/minutes. | |
579
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2389 |
222
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2390 //---- Ascent usage ------------------------------------------------------ |
234
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2391 deepest_first = read_custom_function(54) == 0; |
511
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2392 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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2393 |
646 | 2394 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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2395 |
338 | 2396 for(i=0; i<NUM_STOPS; ++i) |
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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2397 { |
658
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2398 overlay unsigned char newDepth, time; |
234
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2399 |
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2400 // Manage stops in reverse order (CF#54) |
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2401 if( deepest_first ) |
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2402 { |
241 | 2403 time = char_O_deco_time[i]; |
234
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2404 if( time == 0 ) break; // End of table: done. |
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2405 |
658
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2406 newDepth = char_O_deco_depth[i] & 0x7F; |
234
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2407 } |
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2408 else |
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2409 { |
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2410 time = char_O_deco_time[31-i]; |
658
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2411 if( time == 0 ) continue; // not yet: still search table. |
234
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2412 |
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2413 newDepth = char_O_deco_depth[31-i] & 0x7F; |
234
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2414 } |
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2415 |
658
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2416 //---- Gas switch during this step ----------------------------------- |
222
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2417 { |
658
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2418 overlay unsigned char newGas = 0; |
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2419 overlay unsigned char newStop = 0; // NO CHANGE yet |
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2420 overlay unsigned char j; |
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2421 |
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2422 for(j=0; j<NUM_GAS; ++j) |
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2423 { |
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2424 // Skip gas without changing depth: |
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2425 if( ! char_I_deco_gas_change[j] ) |
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2426 continue; |
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2427 // Select gas changed between [newDepth .. depth] |
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2428 if( newDepth <= char_I_deco_gas_change[j] |
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2429 && char_I_deco_gas_change[j] <= depth ) |
646 | 2430 { |
658
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2431 // Keep the DEEPEST gas in that range: |
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2432 // Note: that = means changing gas at BEGINNING of this stop. |
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2433 if( char_I_deco_gas_change[j] >= newStop ) |
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2434 { |
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|
2435 newGas = j; |
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2436 newStop = char_I_deco_gas_change[j]; |
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2437 } |
646 | 2438 } |
658
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2439 } |
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2440 |
658
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2441 if( newStop ) // Did we find something ? |
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2442 { |
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2443 // usage BEFORE gas switch (if any), at 10m/min : |
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2444 if( deco_usage > 0.0 && depth > newStop ) |
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2445 // Plus usage during ascent to the next stop, at 10m/min. |
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2446 volumes[gas] += ((depth+newStop)*0.05 + 1.0) // average depth --> bar. |
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2447 * (depth-newStop)*0.1 // metre --> min |
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2448 * deco_usage; |
646 | 2449 |
658
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2450 // Do gas switch: |
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|
2451 gas = newGas; |
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|
2452 depth = newStop; |
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|
2453 } |
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2454 } |
646 | 2455 |
2456 // usage AFTER gas switch (if any), at 10m/min : | |
2457 if( depth > newDepth ) | |
2458 volumes[gas] += ((depth+newDepth)*0.05 + 1.0) // average depth --> bar. | |
2459 * (depth-newDepth)*0.1 // metre --> min | |
2460 * deco_usage; | |
2461 | |
2462 // Do stop: | |
2463 depth = newDepth; | |
2464 | |
2465 // Usage at stop: | |
478
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2466 if( deco_usage > 0.0 ) |
265 | 2467 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
2468 * time // in minutes. | |
646 | 2469 * deco_usage; // in xxx / min @ 1bar. |
265 | 2470 else |
2471 volumes[gas] = 65535.0; | |
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2472 } |
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2473 |
646 | 2474 // From last stop to surface |
2475 if( deco_usage > 0.0 ) | |
2476 volumes[gas] += (depth*0.05 + 1.0) // avg depth --> bar. | |
2477 * depth * 0.1 // time to surface, in minutes. | |
2478 * deco_usage; // in xxx / min @ 1bar. | |
2479 | |
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2480 //---- convert results for the ASM interface ----------------------------- |
338 | 2481 for(i=0; i<NUM_GAS; ++i) |
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2482 if( volumes[i] > 65534.0 ) |
224 | 2483 int_O_gas_volumes[i] = 65535; |
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2484 else |
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2485 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); |
116 | 2486 } |
2487 | |
167 | 2488 ////////////////////////////////////////////////////////////////////////////// |
2489 | |
116 | 2490 void deco_push_tissues_to_vault(void) |
2491 { | |
167 | 2492 overlay unsigned char x; |
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diff
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|
2493 RESET_C_STACK |
167 | 2494 |
116 | 2495 cns_vault = CNS_fraction; |
339 | 2496 for (x=0;x<NUM_COMP;x++) |
2497 { | |
2498 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
2499 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
2500 } | |
116 | 2501 } |
167 | 2502 |
116 | 2503 void deco_pull_tissues_from_vault(void) |
2504 { | |
167 | 2505 overlay unsigned char x; |
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|
2506 RESET_C_STACK |
167 | 2507 |
339 | 2508 for (x=0; x<NUM_COMP; x++) |
2509 { | |
2510 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
2511 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
2512 } | |
292 | 2513 |
2514 // Restore both CNS variable, too. | |
2515 CNS_fraction = cns_vault; | |
514 | 2516 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
116 | 2517 } |
2518 | |
167 | 2519 ////////////////////////////////////////////////////////////////////////////// |
2520 // | |
184 | 2521 #ifndef CROSS_COMPILE |
2522 void main() {} | |
2523 #endif |