Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 697:53e41fa1e3f0
BUGFIX Vault low_depth too.
author | JeanDo |
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date | Wed, 06 Mar 2013 14:21:48 +0100 |
parents | 5bf4f526f552 |
children | 1a5804e21d3f |
rev | line source |
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116 | 1 // ************************************************************** |
2 // p2_deco.c | |
3 // | |
4 // Created on: 12.05.2009 | |
5 // Author: chsw | |
6 // | |
7 // ************************************************************** | |
8 | |
9 ////////////////////////////////////////////////////////////////////////////// | |
10 // OSTC - diving computer code | |
532 | 11 // Copyright (C) 2011 HeinrichsWeikamp GbR |
116 | 12 // |
13 // This program is free software: you can redistribute it and/or modify | |
14 // it under the terms of the GNU General Public License as published by | |
15 // the Free Software Foundation, either version 3 of the License, or | |
16 // (at your option) any later version. | |
17 // | |
18 // This program is distributed in the hope that it will be useful, | |
19 // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 // GNU General Public License for more details. | |
22 // | |
23 // You should have received a copy of the GNU General Public License | |
24 // along with this program. If not, see <http://www.gnu.org/licenses/>. | |
25 // | |
26 ////////////////////////////////////////////////////////////////////////////// | |
27 | |
28 // ***************************** | |
29 // ** I N T R O D U C T I O N ** | |
30 // ***************************** | |
31 // | |
32 // OSTC | |
33 // | |
34 // code: | |
35 // p2_deco_main_c_v101.c | |
36 // part2 of the OSTC code | |
37 // code with constant O2 partial pressure routines | |
38 // under construction !! | |
39 // | |
40 // summary: | |
41 // decompression routines | |
42 // for the OSTC experimental project | |
43 // written by Christian Weikamp | |
44 // last revision __________ | |
45 // comments added _________ | |
46 // | |
47 // additional files: | |
48 // p2_tables_v100.romdata (other files) | |
49 // 18f4685_ostc_v100.lkr (linker script) | |
50 // | |
51 // history: | |
52 // 01/03/08 v100: first release candidate | |
53 // 03/13/08 v101: start of programming ppO2 code | |
54 // 03/13/25 v101a: backup of interrim version with ppO2 calculation | |
55 // 03/13/25 v101: open circuit gas change during deco | |
56 // 03/13/25 v101: CNS_fraction calculation | |
57 // 03/13/26 v101: optimization of tissue calc routines | |
58 // 07/xx/08 v102a: debug of bottom time routine | |
59 // 09/xx/08 v102d: Gradient Factor Model implemenation | |
60 // 10/10/08 v104: renamed to build v103 for v118 stable | |
171 | 61 // 10/14/08 v104: integration of char_I_depth_last_deco for Gradient Model |
116 | 62 // 03/31/09 v107: integration of FONT Incon24 |
63 // 05/23/10 v109: 5 gas changes & 1 min timer | |
64 // 07/13/10 v110: cns vault added | |
65 // 12/25/10 v110: split in three files (deco.c, main.c, definitions.h) | |
163 | 66 // 2011/01/20: [jDG] Create a common file included in ASM and C code. |
167 | 67 // 2011/01/23: [jDG] Added read_custom_function(). |
203 | 68 // 2011/01/24: [jDG] Make ascenttime an short. No more overflow! |
169
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69 // 2011/01/25: [jDG] Fusion deco array for both models. |
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70 // 2011/01/25: [jDG] Use CF(54) to reverse deco order. |
193 | 71 // 2011/02/11: [jDG] Reworked gradient-factor implementation. |
197 | 72 // 2011/02/13: [jDG] CF55 for additional gas switch delay in decoplan. |
275
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73 // 2011/02/15: [jDG] Fixed inconsistencies introduced by gas switch delays. |
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74 // 2011/03/21: [jDG] Added gas consumption (CF56 & CF57) evaluation for OCR mode. |
293
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75 // 2011/04/10: [jDG] Use timer TMR3 to limit loops in calc_hauptroutine_calc_deco(). |
275
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76 // 2011/04/15: [jDG] Store low_depth in 32bits (w/o rounding), for a better stability. |
293
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77 // 2011/04/25: [jDG] Added 1mn mode for CNS calculation, to allow it for decoplanning. |
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78 // 2011/04/27: [jDG] Fixed char_O_gradient_factor calculation when model uses gradient-factor. |
334
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79 // 2011/05/02: [jDG] Added "Future TTS" function (CF58). |
338 | 80 // 2011/05/17: [jDG] Various cleanups. |
511
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81 // 2011/08/08: [jDG] Computes CNS during deco planning ascent. |
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82 // 2011/11/24: [jDG] Slightly faster and better NDL computation. |
562 | 83 // 2011/12/17: [mH] Remove of the useless debug stuff |
561 | 84 // 2012/02/24: [jDG] Remove missed stop bug. |
562 | 85 // 2012/02/25: [jDG] Looking for a more stable LOW grad factor reference. |
646 | 86 // 2012/09/10: [mH] Fill char_O_deco_time_for_log for logbook write |
87 // 2012/10/05: [jDG] Better deco_gas_volumes accuracy (average depth, switch between stop). | |
697 | 88 // 2013/03/05: [jDG] Should vault low_depth too. |
116 | 89 // |
167 | 90 // TODO: |
91 // + Allow to abort MD2 calculation (have to restart next time). | |
92 // | |
93 // Literature: | |
200 | 94 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
116 | 95 // 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 |
96 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
97 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
98 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
99 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
167 | 100 // |
101 // | |
116 | 102 |
103 // ********************* | |
104 // ** I N C L U D E S ** | |
105 // ********************* | |
106 #include <math.h> | |
167 | 107 |
192 | 108 // *********************************************** |
109 // ** V A R I A B L E S D E F I N I T I O N S ** | |
110 // *********************************************** | |
111 | |
112 #include "p2_definitions.h" | |
275
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113 #define TEST_MAIN |
509 | 114 #include "../OSTC_code_asm_part1/shared_definitions.h" |
192 | 115 |
200 | 116 // Water vapour partial pressure in the lumb. |
527 | 117 #define ppWater 0.0627 |
317 | 118 #define METER_TO_BAR 0.09985 |
119 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
200 | 120 |
491
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121 // Surface security factor |
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122 #define SURFACE_DESAT_FACTOR 0.7042 |
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123 |
167 | 124 // ************************* |
125 // ** P R O T O T Y P E S ** | |
126 // ************************* | |
127 | |
128 static void calc_hauptroutine(void); | |
129 static void calc_nullzeit(void); | |
130 | |
192 | 131 static void calc_tissue(PARAMETER unsigned char period); |
258 | 132 static void calc_limit(void); |
192 | 133 |
167 | 134 static void clear_tissue(void); |
135 static void calc_ascenttime(void); | |
136 static void update_startvalues(void); | |
169
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137 static void clear_deco_table(void); |
471 | 138 static unsigned char update_deco_table(void); |
192 | 139 |
140 static void sim_tissue(PARAMETER unsigned char period); | |
141 static void sim_limit(PARAMETER float GF_current); | |
312
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142 static void sim_extra_time(void); |
368 | 143 static void calc_dive_interval(void); |
312
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144 |
167 | 145 static void calc_gradient_factor(void); |
146 static void calc_wo_deco_step_1_min(void); | |
147 | |
148 static void calc_hauptroutine_data_input(void); | |
149 static void calc_hauptroutine_update_tissues(void); | |
150 static void calc_hauptroutine_calc_deco(void); | |
169
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151 static void sim_ascent_to_first_stop(void); |
167 | 152 |
241 | 153 static unsigned char gas_switch_deepest(void); |
154 static void gas_switch_set(void); | |
217 | 155 |
241 | 156 static unsigned char calc_nextdecodepth(void); |
116 | 157 |
200 | 158 //---- Bank 4 parameters ----------------------------------------------------- |
601
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159 #ifndef UNIX |
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160 # pragma udata bank4=0x400 |
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161 #endif |
116 | 162 |
163 static float GF_low; | |
164 static float GF_high; | |
165 static float GF_delta; | |
192 | 166 static float locked_GF_step; // GF_delta / low_depth |
167 | |
168 static unsigned char temp_depth_limit; | |
695 | 169 float low_depth; // Depth of deepest stop |
171 | 170 |
192 | 171 // Simulation context: used to predict ascent. |
695 | 172 unsigned char sim_lead_tissue_no; // Leading compatiment number. |
173 float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
116 | 174 |
192 | 175 // Real context: what we are doing now. |
176 static float calc_lead_tissue_limit; // | |
116 | 177 |
338 | 178 static unsigned char internal_deco_time[NUM_STOPS]; |
179 static unsigned char internal_deco_depth[NUM_STOPS]; | |
116 | 180 |
181 static float cns_vault; | |
697 | 182 static float low_depth_vault; |
339 | 183 static float pres_tissue_N2_vault[NUM_COMP]; |
184 static float pres_tissue_He_vault[NUM_COMP]; | |
116 | 185 |
163 | 186 //---- Bank 5 parameters ----------------------------------------------------- |
601
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187 #ifndef UNIX |
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188 # pragma udata bank5=0x500 |
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189 #endif |
163 | 190 |
167 | 191 static unsigned char ci; |
116 | 192 static float pres_respiration; |
193 static float pres_surface; | |
194 static float temp_deco; | |
236 | 195 static float ppN2; |
200 | 196 static float ppHe; |
116 | 197 static float temp_tissue; |
200 | 198 static float N2_ratio; // Breathed gas nitrogen ratio. |
199 static float He_ratio; // Breathed gas helium ratio. | |
200 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
201 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
202 static float var_He_a; // Bühlmann a, for current He tissue. | |
203 static float var_He_b; // Bühlmann b, for current He tissue. | |
204 static float var_N2_e; // Exposition, for current N2 tissue. | |
205 static float var_He_e; // Exposition, for current He tissue. | |
509 | 206 static float var_N2_ht; // Half-time for current N2 tissue. |
207 static float var_He_ht; // Half-time for current N2 tissue. | |
116 | 208 |
338 | 209 static float pres_diluent; // new in v.101 |
210 static float const_ppO2; // new in v.101 | |
116 | 211 |
241 | 212 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
213 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
203 | 214 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
215 static unsigned short sim_dive_mins; // Simulated dive time. | |
200 | 216 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
217 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
218 static float CNS_fraction; // new in v.101 | |
219 static float float_saturation_multiplier; // new in v.101 | |
220 static float float_desaturation_multiplier; // new in v.101 | |
338 | 221 static float float_deco_distance; // new in v.101 |
222 static char flag_in_divemode; // new in v.108 | |
167 | 223 |
338 | 224 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
167 | 225 |
163 | 226 //---- Bank 6 parameters ----------------------------------------------------- |
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227 #ifndef UNIX |
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228 # pragma udata bank6=0x600 |
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229 #endif |
116 | 230 |
339 | 231 float pres_tissue_N2[NUM_COMP]; |
232 float pres_tissue_He[NUM_COMP]; | |
509 | 233 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. |
234 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
116 | 235 |
163 | 236 //---- Bank 7 parameters ----------------------------------------------------- |
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237 #ifndef UNIX |
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238 # pragma udata bank7=0x700 |
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239 #endif |
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240 |
509 | 241 // EMPTY ... |
116 | 242 |
163 | 243 //---- Bank 8 parameters ----------------------------------------------------- |
601
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244 #ifndef UNIX |
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245 # pragma udata bank8=0x800 |
163 | 246 |
601
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247 static char md_pi_subst[256]; |
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248 # define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
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249 |
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250 #endif |
116 | 251 |
163 | 252 //---- Bank 9 parameters ----------------------------------------------------- |
601
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253 #ifndef UNIX |
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254 # pragma udata bank9=0x900 |
116 | 255 |
601
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256 static char md_state[48]; // DONT MOVE : has to be at the beginning of bank 9 for the asm code!!! |
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257 #endif |
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258 |
116 | 259 |
167 | 260 ////////////////////////////////////////////////////////////////////////////// |
261 ////////////////////////////////////////////////////////////////////////////// | |
262 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
263 ////////////////////////////////////////////////////////////////////////////// | |
264 ////////////////////////////////////////////////////////////////////////////// | |
265 // | |
266 // End of PROM code is 17F00, So push tables on PROM top... | |
267 // | |
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268 #ifndef UNIX |
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269 # pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. |
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270 #endif |
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271 |
167 | 272 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) |
116 | 273 |
167 | 274 // Magic table to compute the MD2 HASH |
275 // | |
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276 #ifndef UNIX |
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277 # pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... |
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278 rom const rom unsigned short md_pi[] = |
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279 { |
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280 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 |
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281 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA |
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282 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 |
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283 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A |
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284 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 |
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285 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 |
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286 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 |
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287 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 |
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288 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 |
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290 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 |
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291 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 |
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292 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A |
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293 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 |
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294 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A |
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295 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 |
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296 }; |
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297 #endif |
116 | 298 |
167 | 299 ////////////////////////////////////////////////////////////////////////////// |
300 ////////////////////////////////////////////////////////////////////////////// | |
301 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
302 ////////////////////////////////////////////////////////////////////////////// | |
303 ////////////////////////////////////////////////////////////////////////////// | |
304 // | |
116 | 305 // all new in v.102 |
306 // moved from 0x0D000 to 0x0C000 in v.108 | |
601
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307 #ifndef UNIX |
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308 # pragma code p2_deco = 0x0C000 |
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309 #endif |
116 | 310 |
167 | 311 ////////////////////////////////////////////////////////////////////////////// |
312 ////////////////////////////////////////////////////////////////////////////// | |
313 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
314 ////////////////////////////////////////////////////////////////////////////// | |
315 ////////////////////////////////////////////////////////////////////////////// | |
316 | |
235 | 317 ////////////////////////////////////////////////////////////////////////////// |
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318 // Bump to blue-screen when an assert is wrong |
235 | 319 #ifdef __DEBUG |
320 void assert_failed(PARAMETER short int line) | |
321 { | |
681 | 322 extern void DISP_resetdebugger(void); |
235 | 323 extern unsigned short temp10; |
324 | |
257
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325 temp10 = line; // Show source line number as stack depth. |
681 | 326 DISP_resetdebugger(); |
235 | 327 } |
328 #endif | |
257
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329 |
235 | 330 ////////////////////////////////////////////////////////////////////////////// |
331 // When calling C code from ASM context, the data stack pointer and | |
332 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
333 | |
334 #ifdef CROSS_COMPILE | |
335 # define RESET_C_STACK | |
336 #else | |
337 # ifdef __DEBUG | |
338 # define RESET_C_STACK fillDataStack(); | |
339 void fillDataStack(void) | |
340 { | |
341 _asm | |
342 LFSR 1,C_STACK | |
343 MOVLW 0xCC | |
344 loop: MOVWF POSTINC1,0 | |
345 TSTFSZ FSR1L,0 | |
346 BRA loop | |
347 | |
348 LFSR 1,C_STACK | |
349 LFSR 2,C_STACK | |
350 _endasm | |
351 } | |
352 # else | |
353 # define RESET_C_STACK \ | |
354 _asm \ | |
355 LFSR 1, C_STACK \ | |
356 LFSR 2, C_STACK \ | |
357 _endasm | |
358 # endif | |
359 #endif | |
360 | |
361 ////////////////////////////////////////////////////////////////////////////// | |
257
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362 // Read CF values from the C code. |
235 | 363 |
488 | 364 #ifdef CROSS_COMPILE |
365 // Full description of the OSTC EEPROM map, including CF values. | |
366 # include "OSTC_eeprom.h" | |
367 #endif | |
368 | |
203 | 369 static short read_custom_function(PARAMETER unsigned char cf) |
167 | 370 { |
184 | 371 #ifdef CROSS_COMPILE |
564 | 372 return (cf & 32) ? eeprom.bank1_CF[cf-32].value.lo |
373 : eeprom.bank0_CF[cf ].value.lo; | |
184 | 374 #else |
167 | 375 extern unsigned char hi, lo; |
376 extern void getcustom15(); | |
377 _asm | |
378 movff cf,WREG | |
379 call getcustom15,0 | |
380 movff lo,PRODL | |
381 movff hi,PRODH | |
382 _endasm | |
184 | 383 #endif |
167 | 384 } |
385 | |
386 ////////////////////////////////////////////////////////////////////////////// | |
257
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387 // Fast subroutine to read RTC timer 3. |
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388 // Note: result is in 1/32 of msecs. |
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389 static unsigned short tmr3(void) |
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390 { |
261 | 391 #ifndef CROSS_COMPILE |
257
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392 _asm |
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393 movff 0xfb2,PRODL // TMR3L |
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394 movff 0xfb3,PRODH // TMR3H |
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395 _endasm // result in PRODH:PRODL. |
261 | 396 #else |
397 return 0; | |
398 #endif | |
257
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399 } |
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400 |
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401 ////////////////////////////////////////////////////////////////////////////// |
258 | 402 // read buhlmann tables A and B for compatriment ci |
403 // | |
404 static void read_buhlmann_coefficients(void) | |
165 | 405 { |
184 | 406 #ifndef CROSS_COMPILE |
167 | 407 // Note: we don't use far rom pointer, because the |
338 | 408 // 24 bits is too complex, hence we have to set |
167 | 409 // the UPPER page ourself... |
410 // --> Set zero if tables are moved to lower pages ! | |
411 _asm | |
412 movlw 1 | |
413 movwf TBLPTRU,0 | |
414 _endasm | |
184 | 415 #endif |
258 | 416 |
564 | 417 assert( ci < NUM_COMP ); |
338 | 418 |
419 // Use an interleaved array (AoS) to access coefficients with a | |
420 // single addressing. | |
421 { | |
422 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
423 var_N2_a = *ptr++; | |
424 var_N2_b = *ptr++; | |
425 var_He_a = *ptr++; | |
426 var_He_b = *ptr++; | |
427 } | |
258 | 428 } |
429 | |
430 ////////////////////////////////////////////////////////////////////////////// | |
431 // read buhlmann tables for compatriment ci | |
432 // If period == 0 : 2sec interval | |
433 // 1 : 1 min interval | |
434 // 2 : 10 min interval. | |
435 static void read_buhlmann_times(PARAMETER char period) | |
436 { | |
437 #ifndef CROSS_COMPILE | |
438 // Note: we don't use far rom pointer, because the | |
439 // 24 bits is to complex, hence we have to set | |
440 // the UPPER page ourself... | |
441 // --> Set zero if tables are moved to lower pages ! | |
442 _asm | |
443 movlw 1 | |
444 movwf TBLPTRU,0 | |
445 _endasm | |
446 #endif | |
338 | 447 |
564 | 448 assert( ci < NUM_COMP ); |
258 | 449 |
165 | 450 // Integration intervals. |
167 | 451 switch(period) |
165 | 452 { |
453 case 0: //---- 2 sec ----------------------------------------------------- | |
338 | 454 { |
455 overlay rom const float* ptr = &e2secs[2*ci]; | |
456 var_N2_e = *ptr++; | |
457 var_He_e = *ptr++; | |
458 } | |
165 | 459 break; |
460 | |
461 case 1: //---- 1 min ----------------------------------------------------- | |
338 | 462 { |
463 overlay rom const float* ptr = &e1min[2*ci]; | |
464 var_N2_e = *ptr++; | |
465 var_He_e = *ptr++; | |
466 } | |
165 | 467 break; |
468 | |
469 case 2: //---- 10 min ---------------------------------------------------- | |
338 | 470 { |
471 overlay rom const float* ptr = &e10min[2*ci]; | |
472 var_N2_e = *ptr++; | |
473 var_He_e = *ptr++; | |
474 } | |
165 | 475 break; |
197 | 476 |
477 default: | |
527 | 478 assert(0); // Never go there... |
165 | 479 } |
480 } | |
481 | |
482 ////////////////////////////////////////////////////////////////////////////// | |
509 | 483 // read buhlmann tables for compatriment ci |
484 // | |
485 static void read_buhlmann_ht(void) | |
486 { | |
487 | |
488 #ifndef CROSS_COMPILE | |
489 // Note: we don't use far rom pointer, because the | |
490 // 24 bits is to complex, hence we have to set | |
491 // the UPPER page ourself... | |
492 // --> Set zero if tables are moved to lower pages ! | |
493 _asm | |
494 movlw 1 | |
495 movwf TBLPTRU,0 | |
496 _endasm | |
497 #endif | |
498 | |
564 | 499 assert( ci < NUM_COMP ); |
509 | 500 { |
501 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
502 var_N2_ht = *ptr++; | |
503 var_He_ht = *ptr++; | |
504 } | |
505 | |
506 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
507 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
508 } | |
509 | |
510 ////////////////////////////////////////////////////////////////////////////// | |
340
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511 // calc_nextdecodepth |
165 | 512 // |
116 | 513 // new in v.102 |
165 | 514 // |
116 | 515 // INPUT, changing during dive: |
509 | 516 // temp_deco |
192 | 517 // low_depth |
167 | 518 // |
116 | 519 // INPUT, fixed during dive: |
167 | 520 // pres_surface |
521 // GF_delta | |
522 // GF_high | |
523 // GF_low | |
171 | 524 // char_I_depth_last_deco |
167 | 525 // float_deco_distance |
526 // | |
241 | 527 // RETURN TRUE iff a stop is needed. |
528 // | |
116 | 529 // OUTPUT |
171 | 530 // locked_GF_step |
167 | 531 // temp_depth_limt |
192 | 532 // low_depth |
167 | 533 // |
241 | 534 static unsigned char calc_nextdecodepth(void) |
167 | 535 { |
241 | 536 //--- Max ascent speed --------------------------------------------------- |
537 // Recompute leading gas limit, at current depth: | |
317 | 538 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
241 | 539 |
540 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
302 | 541 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
241 | 542 |
543 // Do we need to stop at current depth ? | |
544 overlay unsigned char need_stop = 0; | |
545 | |
546 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
547 | |
212 | 548 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
509 | 549 if( char_I_deco_model != 0 ) |
116 | 550 { |
562 | 551 overlay unsigned char first_stop = 0; |
552 overlay float p; | |
553 | |
567 | 554 sim_limit( GF_low ); |
562 | 555 p = sim_lead_tissue_limit - pres_surface; |
695 | 556 p *= BAR_TO_METER; |
562 | 557 if( p <= 0.0f ) |
558 goto no_deco_stop; // We can surface directly... | |
512
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559 |
695 | 560 // Store the deepest point needing a deco stop as the LOW reference for GF. |
561 // NOTE: following stops will be validated using this LOW-HIGH gf scale, | |
562 // so if we want to keep coherency, we should not validate this stop | |
563 // yet, but apply the search to it, as for all the following stops afterward. | |
564 if( p > low_depth ) | |
565 { | |
566 low_depth = p; | |
567 locked_GF_step = GF_delta / low_depth; | |
568 } | |
569 | |
562 | 570 if( p < min_depth ) |
571 goto no_deco_stop; // First stop is higher than 1' ascent. | |
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572 |
695 | 573 // Round to multiple of 3m. |
574 first_stop = 3 * (short)(0.9995f + p*0.333333f); | |
562 | 575 assert( first_stop < 128 ); |
576 | |
577 // Apply correction for the shallowest stop. | |
578 if( first_stop == 3 ) // new in v104 | |
579 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
171 | 580 |
562 | 581 // We have a stop candidate. |
582 // But maybe ascending to the next stop will diminish the constraint, | |
583 // because the GF might decrease more than the preassure gradient... | |
584 while(first_stop > 0) | |
585 { | |
586 overlay unsigned char next_stop; // Next depth (0..90m) | |
171 | 587 |
562 | 588 // Check max speed, or reaching surface. |
589 if( first_stop <= min_depth ) | |
590 goto no_deco_stop; | |
171 | 591 |
562 | 592 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
593 next_stop = 0; | |
594 else if( first_stop == 6 ) | |
595 next_stop = char_I_depth_last_deco; | |
596 else | |
597 next_stop = first_stop - 3; // Index of next (upper) stop. | |
598 | |
599 // Total preassure at the new stop candidate: | |
695 | 600 p = next_stop * METER_TO_BAR |
601 + pres_surface; | |
167 | 602 |
695 | 603 // Recompute limit for this new stop: |
604 if( !low_depth || next_stop > low_depth ) | |
605 sim_limit( GF_low ); | |
606 else | |
607 sim_limit( GF_high - next_stop * locked_GF_step ); | |
192 | 608 |
695 | 609 // Check upper limit (lowest ambiant pressure tolerated): |
610 if( sim_lead_tissue_limit >= p ) | |
611 goto deco_stop_found; // Ascent to next_stop forbiden. | |
562 | 612 |
613 // Else, validate that stop and loop... | |
614 first_stop = next_stop; | |
615 } | |
171 | 616 |
562 | 617 no_deco_stop: |
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618 temp_depth_limit = min_depth; |
562 | 619 goto done; |
212 | 620 |
695 | 621 deco_stop_found: |
562 | 622 // next stop is the last validated depth found, aka first_stop |
623 need_stop = 1; // Hit. | |
624 temp_depth_limit = first_stop; // Stop depth, in meter. | |
625 | |
626 done: | |
627 ; | |
116 | 628 } |
167 | 629 else //---- ZH-L16 model ------------------------------------------------- |
116 | 630 { |
192 | 631 overlay float pres_gradient; |
632 | |
633 // Original model | |
116 | 634 // optimized in v.101 |
171 | 635 // char_I_depth_last_deco included in v.101 |
116 | 636 |
192 | 637 // Compute sim_lead_tissue_limit too, but just once. |
638 sim_limit(1.0); | |
639 | |
640 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
167 | 641 if (pres_gradient >= 0) |
116 | 642 { |
317 | 643 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
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644 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
241 | 645 need_stop = 1; // Hit. |
646 | |
647 // Implement last stop at 4m/5m/6m... | |
648 if( temp_depth_limit == 3 ) | |
649 temp_depth_limit = char_I_depth_last_deco; | |
171 | 650 } |
116 | 651 else |
241 | 652 temp_depth_limit = 0; |
171 | 653 } |
212 | 654 |
217 | 655 //---- Check gas change -------------------------------------------------- |
241 | 656 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
657 | |
658 return need_stop; | |
167 | 659 } |
116 | 660 |
167 | 661 ////////////////////////////////////////////////////////////////////////////// |
169
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662 // copy_deco_table |
167 | 663 // |
169
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664 // Buffer the stops, once computed, so we can continue to display them |
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665 // while computing the next set. |
167 | 666 // |
169
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667 static void copy_deco_table(void) |
116 | 668 { |
169
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669 // Copy depth of the first (deepest) stop, because when reversing |
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670 // order, it will be hard to find... |
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671 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
169
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672 char_O_first_deco_time = internal_deco_time [0]; |
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673 |
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674 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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675 { |
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676 overlay unsigned char x, y; |
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677 |
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678 //---- First: search the first non-null depth |
339 | 679 for(x=(NUM_STOPS-1); x != 0; --x) |
169
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680 if( internal_deco_depth[x] != 0 ) break; |
116 | 681 |
169
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682 //---- Second: copy to output table (in reverse order) |
338 | 683 for(y=0; y<NUM_STOPS; y++, --x) |
169
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684 { |
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685 char_O_deco_depth[y] = internal_deco_depth[x]; |
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686 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
169
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687 char_O_deco_time [y] = internal_deco_time [x]; |
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688 |
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689 // Stop only once the last transfer is done. |
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690 if( x == 0 ) break; |
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691 } |
116 | 692 |
169
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693 //---- Third: fill table end with null |
339 | 694 for(y++; y<NUM_STOPS; y++) |
169
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695 { |
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696 char_O_deco_time [y] = 0; |
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697 char_O_deco_depth[y] = 0; |
630
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698 char_O_deco_time_for_log[y] = 0; |
169
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699 } |
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700 } |
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701 else //---- Straight copy ------------------------------------------------ |
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702 { |
630
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703 overlay unsigned char x, y; |
167 | 704 |
339 | 705 for(x=0; x<NUM_STOPS; x++) |
169
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706 { |
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707 char_O_deco_depth[x] = internal_deco_depth[x]; |
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708 char_O_deco_time [x] = internal_deco_time [x]; |
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709 } |
630
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710 |
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711 //Now fill the char_O_deco_time_for_log array |
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712 //---- First: search the first non-null depth |
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713 for(x=(NUM_STOPS-1); x != 0; --x) |
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714 if( internal_deco_depth[x] != 0 ) break; |
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715 |
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716 //---- Second: copy to output table (in reverse order) |
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717 for(y=0; y<NUM_STOPS; y++, --x) |
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718 { |
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719 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
630
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720 |
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721 // Stop only once the last transfer is done. |
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722 if( x == 0 ) break; |
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723 } |
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724 |
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725 //---- Third: fill table end with null |
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726 for(y++; y<NUM_STOPS; y++) |
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727 { |
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728 char_O_deco_time_for_log [y] = 0; |
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729 } |
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730 |
169
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731 } |
167 | 732 } |
116 | 733 |
167 | 734 ////////////////////////////////////////////////////////////////////////////// |
116 | 735 // temp_tissue_safety // |
167 | 736 // |
116 | 737 // outsourced in v.102 |
167 | 738 // |
739 // Apply safety factors for brand ZH-L16 model. | |
740 // | |
741 static void temp_tissue_safety(void) | |
116 | 742 { |
197 | 743 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
744 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
745 | |
167 | 746 if( char_I_deco_model == 0 ) |
116 | 747 { |
491
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748 if( temp_tissue < 0.0 ) |
126 | 749 temp_tissue *= float_desaturation_multiplier; |
116 | 750 else |
126 | 751 temp_tissue *= float_saturation_multiplier; |
116 | 752 } |
167 | 753 } |
116 | 754 |
167 | 755 ////////////////////////////////////////////////////////////////////////////// |
756 ////////////////////////////////////////////////////////////////////////////// | |
116 | 757 // ** THE JUMP-IN CODE ** |
758 // ** for the asm code ** | |
167 | 759 ////////////////////////////////////////////////////////////////////////////// |
760 ////////////////////////////////////////////////////////////////////////////// | |
122
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761 |
167 | 762 ////////////////////////////////////////////////////////////////////////////// |
169
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763 // Called every 2 seconds during diving. |
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764 // update tissues every time. |
184 | 765 // |
169
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766 // Every 6 seconds (or slower when TTS > 16): |
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767 // - update deco table (char_O_deco_time/depth) with new values. |
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768 // - update ascent time, |
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769 // - set status to zero (so we can check there is new results). |
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770 // |
116 | 771 void deco_calc_hauptroutine(void) |
772 { | |
122
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773 RESET_C_STACK |
116 | 774 calc_hauptroutine(); |
775 int_O_desaturation_time = 65535; | |
776 } | |
777 | |
167 | 778 ////////////////////////////////////////////////////////////////////////////// |
184 | 779 // Reset decompression model: |
780 // + Set all tissues to equilibrium with Air at ambient pressure. | |
781 // + Reset last stop to 0m | |
782 // + Reset all model output. | |
116 | 783 void deco_clear_tissue(void) |
784 { | |
122
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785 RESET_C_STACK |
116 | 786 clear_tissue(); |
787 } | |
788 | |
167 | 789 ////////////////////////////////////////////////////////////////////////////// |
278 | 790 // Called every 1 min during decoplanning. |
791 // Update tissues for 1 min. | |
792 // | |
793 void deco_calc_tissue(void) | |
794 { | |
795 RESET_C_STACK | |
796 calc_hauptroutine_update_tissues(); | |
797 } | |
798 | |
799 ////////////////////////////////////////////////////////////////////////////// | |
167 | 800 |
116 | 801 void deco_calc_wo_deco_step_1_min(void) |
802 { | |
122
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803 RESET_C_STACK |
116 | 804 calc_wo_deco_step_1_min(); |
805 deco_calc_desaturation_time(); | |
806 } | |
807 | |
167 | 808 ////////////////////////////////////////////////////////////////////////////// |
809 | |
368 | 810 void deco_calc_dive_interval(void) |
811 { | |
812 RESET_C_STACK | |
813 calc_dive_interval(); | |
814 } | |
815 | |
241 | 816 ////////////////////////////////////////////////////////////////////////////// |
817 // Find current gas in the list (if any). | |
818 // | |
513 | 819 // Input: char_I_current_gas = 1..6 |
241 | 820 // |
513 | 821 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. |
241 | 822 // |
823 static void gas_switch_find_current(void) | |
824 { | |
513 | 825 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
247
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826 |
388 | 827 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 |
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828 { |
388 | 829 sim_gas_last_used = char_I_current_gas; |
830 | |
831 // Note: if current is first gas, we must find it, but not set | |
832 // last depth change to surface. | |
833 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
834 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
241 | 835 } |
388 | 836 else |
837 sim_gas_last_used = 0; // Gas 6 = manual set | |
241 | 838 } |
839 | |
167 | 840 ////////////////////////////////////////////////////////////////////////////// |
217 | 841 // Find deepest available gas. |
201 | 842 // |
241 | 843 // Input: temp_depth_limit, |
844 // deco_gas_change[] | |
845 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
212 | 846 // |
241 | 847 // RETURNS TRUE if a stop is needed for gas switch. |
848 // | |
849 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
212 | 850 // |
241 | 851 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
852 // are null), or during the ascent to make sure we are not passing a | |
853 // stop (in which case both can be already set). | |
854 // | |
855 static unsigned char gas_switch_deepest(void) | |
201 | 856 { |
241 | 857 overlay unsigned char switch_deco = 0, switch_last = 0; |
201 | 858 |
859 if (char_I_const_ppO2 == 0) | |
860 { | |
225 | 861 overlay unsigned char j; |
862 | |
241 | 863 // Loop over all enabled gas, to find the deepest one, |
340
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864 // above last used gas, but below temp_depth_limit. |
338 | 865 for(j=0; j<NUM_GAS; ++j) |
225 | 866 { |
241 | 867 // Gas not (yet) allowed ? Skip ! |
868 if( temp_depth_limit > deco_gas_change[j] ) | |
869 continue; | |
870 | |
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871 // Gas deeper (or equal) than the current one ? Skip ! |
241 | 872 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
873 continue; | |
874 | |
875 // First, or deeper ? | |
247
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876 if( switch_deco < deco_gas_change[j] ) |
241 | 877 { |
878 switch_deco = deco_gas_change[j]; | |
388 | 879 switch_last = j+1; // 1..5 |
241 | 880 } |
225 | 881 } |
201 | 882 } |
883 | |
203 | 884 // If there is a better gas available |
241 | 885 if( switch_deco ) |
201 | 886 { |
646 | 887 unsigned char delay; |
888 delay = read_custom_function(55); | |
555
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889 |
241 | 890 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
201 | 891 |
241 | 892 // Should restart gas-switch delay only when gas do changes... |
893 assert( sim_gas_delay <= sim_dive_mins ); | |
217 | 894 |
241 | 895 sim_gas_last_depth = switch_deco; |
896 sim_gas_last_used = switch_last; | |
555
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897 sim_gas_delay = delay |
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898 + sim_dive_mins; |
217 | 899 |
555
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900 if( delay ) |
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901 { |
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902 temp_depth_limit = switch_deco; |
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903 return 1; |
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904 } |
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905 else |
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906 return 0; |
217 | 907 } |
908 | |
241 | 909 sim_gas_delay = 0; |
910 return 0; | |
217 | 911 } |
912 | |
913 ////////////////////////////////////////////////////////////////////////////// | |
914 // Calculate gas switches | |
915 // | |
916 // | |
917 // Input: N2_ratio, He_ratio. | |
918 // sim_gas_last_used | |
919 // | |
920 // Output: calc_N2_ratio, calc_He_ratio | |
921 // | |
241 | 922 static void gas_switch_set(void) |
217 | 923 { |
564 | 924 assert( sim_gas_last_used <= NUM_GAS ); |
217 | 925 |
388 | 926 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. |
224 | 927 { |
928 calc_N2_ratio = N2_ratio; | |
929 calc_He_ratio = He_ratio; | |
930 } | |
931 else | |
932 { | |
933 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
934 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
217 | 935 } |
201 | 936 |
937 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
938 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
939 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
940 } | |
941 | |
942 ////////////////////////////////////////////////////////////////////////////// | |
943 // | |
212 | 944 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
509 | 945 // temp_deco : simulated respiration pressure |
276 | 946 // float_deco_distance : security factor. |
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947 // Water-vapor pressure inside limbs (ppWater). |
212 | 948 // |
236 | 949 // Output: ppN2, ppHe. |
212 | 950 // |
951 static void sim_alveolar_presures(void) | |
201 | 952 { |
212 | 953 overlay float deco_diluent = temp_deco; // new in v.101 |
954 | |
276 | 955 // Take deco offset into account, but not at surface. |
956 // Note: this should be done on ambiant pressure, hence before | |
957 // computing the diluant partial pressure... | |
958 if( deco_diluent > pres_surface ) | |
959 deco_diluent += float_deco_distance; | |
960 | |
212 | 961 //---- CCR mode : deco gas switch ? -------------------------------------- |
276 | 962 if( char_I_const_ppO2 != 0 ) |
201 | 963 { |
276 | 964 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
965 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
310
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966 // ppWater in the equations below: |
321 | 967 deco_diluent -= const_ppO2; |
276 | 968 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
212 | 969 |
970 if (deco_diluent > temp_deco) | |
971 deco_diluent = temp_deco; | |
201 | 972 } |
973 | |
310
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974 if( deco_diluent > ppWater ) |
201 | 975 { |
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976 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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977 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
201 | 978 } |
979 else | |
980 { | |
236 | 981 ppN2 = 0.0; |
201 | 982 ppHe = 0.0; |
983 } | |
236 | 984 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
201 | 985 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
986 } | |
987 | |
988 ////////////////////////////////////////////////////////////////////////////// | |
167 | 989 // clear_tissue |
990 // | |
165 | 991 // optimized in v.101 (var_N2_a) |
167 | 992 // |
993 // preload tissues with standard pressure for the given ambient pressure. | |
994 // Note: fixed N2_ratio for standard air. | |
201 | 995 // |
167 | 996 static void clear_tissue(void) |
116 | 997 { |
511
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998 overlay float p; |
116 | 999 flag_in_divemode = 0; |
1000 | |
167 | 1001 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
1002 N2_ratio = 0.7902; | |
212 | 1003 pres_respiration = int_I_pres_respiration * 0.001; |
164 | 1004 |
511
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1005 p = N2_ratio * (pres_respiration - ppWater); |
338 | 1006 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1007 { |
511
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1008 // cycle through the 16 Bühlmann N2 tissues |
339 | 1009 pres_tissue_N2[ci] = p; |
197 | 1010 |
1011 // cycle through the 16 Bühlmann tissues for Helium | |
339 | 1012 pres_tissue_He[ci] = 0.0; |
511
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1013 } |
116 | 1014 |
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1015 clear_deco_table(); |
126 | 1016 char_O_deco_status = 0; |
1017 char_O_nullzeit = 0; | |
168 | 1018 int_O_ascenttime = 0; |
126 | 1019 char_O_gradient_factor = 0; |
1020 char_O_relative_gradient_GF = 0; | |
258 | 1021 |
1022 calc_lead_tissue_limit = 0.0; | |
1023 char_O_gtissue_no = 0; | |
167 | 1024 } |
116 | 1025 |
167 | 1026 ////////////////////////////////////////////////////////////////////////////// |
1027 // calc_hauptroutine | |
1028 // | |
1029 // this is the major code in dive mode calculates: | |
116 | 1030 // the tissues, |
167 | 1031 // the bottom time, |
1032 // and simulates the ascend with all deco stops. | |
171 | 1033 // |
1034 // The deco_state sequence is : | |
1035 // 3 (at surface) | |
1036 // +---> 0 : calc nullzeit | |
1037 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
1038 // | +-> 1 : simulate up to 16min of stops. | |
1039 // | +------< not finished | |
1040 // +--------< finish | |
1041 // | |
312
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1042 // Added steps 6,5 for @+5 calculation: |
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1043 // 6 = ascent to first stop (same as 2), except continue to 7 |
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1044 // 7 = same as 1, except loop to 7. |
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1045 // |
167 | 1046 static void calc_hauptroutine(void) |
116 | 1047 { |
241 | 1048 static unsigned char backup_gas_used = 0; |
1049 static unsigned char backup_gas_depth = 0; | |
217 | 1050 static unsigned char backup_gas_delay = 0; |
186 | 1051 |
116 | 1052 calc_hauptroutine_data_input(); |
1053 | |
1054 calc_hauptroutine_update_tissues(); | |
1055 calc_gradient_factor(); | |
1056 | |
167 | 1057 // toggle between calculation for nullzeit (bottom time), |
1058 // deco stops | |
1059 // and more deco stops (continue) | |
697 | 1060 switch( char_O_deco_status ) |
116 | 1061 { |
186 | 1062 case 3: //---- At surface: start a new dive ------------------------------ |
1063 clear_deco_table(); | |
1064 copy_deco_table(); | |
200 | 1065 int_O_ascenttime = 0; // Reset DTR. |
323 | 1066 int_O_extra_ascenttime = 0; |
200 | 1067 char_O_nullzeit = 0; // Reset bottom time. |
278 | 1068 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
201 | 1069 |
217 | 1070 // Values that should be reset just once for the full real dive. |
1071 // This is used to record the lowest stop for the whole dive, | |
1072 // Including ACCROSS all simulated ascent. | |
695 | 1073 low_depth = 0.0; |
567 | 1074 locked_GF_step = 0.0; |
217 | 1075 |
1076 // Reset gas switch history. | |
241 | 1077 backup_gas_used = sim_gas_last_used = 0; |
1078 backup_gas_depth = sim_gas_last_depth = 0; | |
217 | 1079 backup_gas_delay = sim_gas_delay = 0; |
203 | 1080 sim_dive_mins = 0; |
1081 break; | |
186 | 1082 |
167 | 1083 case 0: //---- bottom time ----------------------------------------------- |
312
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1084 default: |
509 | 1085 gas_switch_find_current(); // Lookup for current gas & time. |
1086 gas_switch_set(); // setup calc_ratio's | |
1087 | |
167 | 1088 calc_nullzeit(); |
534
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1089 if( char_O_nullzeit > 0 ) // Some NDL time left ? |
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1090 { |
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1091 char_O_deco_status = 0; // YES: recalc ndl next time. |
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1092 clear_deco_table(); // Also clear stops ! |
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1093 copy_deco_table(); |
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1094 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) |
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1095 } |
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1096 else |
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1097 char_O_deco_status = 2; // NO: calc ascent next time. |
186 | 1098 break; |
1099 | |
1100 case 2: //---- Simulate ascent to first stop ----------------------------- | |
312
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1101 case 6: // @+5min variation |
203 | 1102 // Check proposed gas at begin of ascent simulation |
247
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1103 sim_dive_mins = int_I_divemins; // Init current time. |
241 | 1104 |
532 | 1105 gas_switch_find_current(); // Lookup for current gas & time. |
1106 gas_switch_set(); // setup calc_ratio's | |
1107 | |
247
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1108 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1109 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
203 | 1110 backup_gas_delay = sim_gas_delay; |
186 | 1111 |
1112 sim_ascent_to_first_stop(); | |
201 | 1113 |
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1114 // Calc stops next time (deco or gas switch). |
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1115 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
167 | 1116 break; |
169
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1117 |
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1118 case 1: //---- Simulate stops -------------------------------------------- |
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1119 case 5: // @+5 variation. |
167 | 1120 calc_hauptroutine_calc_deco(); |
186 | 1121 |
1122 // If simulation is finished, restore the GF low reference, so that | |
1123 // next ascent simulation is done from the current depth: | |
312
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1124 if( (char_O_deco_status & 3) == 0 ) |
186 | 1125 { |
241 | 1126 sim_gas_last_used = backup_gas_used; |
1127 sim_gas_last_depth = backup_gas_depth; | |
247
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1128 sim_gas_delay = backup_gas_delay; |
186 | 1129 } |
167 | 1130 break; |
116 | 1131 } |
167 | 1132 |
116 | 1133 } |
1134 | |
167 | 1135 ////////////////////////////////////////////////////////////////////////////// |
1136 // calc_hauptroutine_data_input | |
1137 // | |
1138 // Reset all C-code dive parameters from their ASM-code values. | |
1139 // Detect gas change condition. | |
1140 // | |
116 | 1141 void calc_hauptroutine_data_input(void) |
1142 { | |
203 | 1143 overlay short int_temp; |
511
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1144 overlay unsigned char g; |
126 | 1145 |
197 | 1146 pres_respiration = int_I_pres_respiration * 0.001; |
1147 pres_surface = int_I_pres_surface * 0.001; | |
1148 N2_ratio = char_I_N2_ratio * 0.01; | |
1149 He_ratio = char_I_He_ratio * 0.01; | |
1150 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
116 | 1151 |
126 | 1152 // ____________________________________________________ |
1153 // | |
1154 // _____________ G A S _ C H A N G E S ________________ | |
1155 // ____________________________________________________ | |
1156 | |
212 | 1157 // Keep a margin of 150mbar = 1.50m |
1158 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
1159 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
126 | 1160 |
203 | 1161 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
511
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1162 for(g=0; g < NUM_GAS; ++g) |
126 | 1163 { |
511
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1164 deco_gas_change[g] = 0; |
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1165 if(char_I_deco_gas_change[g]) |
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1166 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) |
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1167 deco_gas_change[g] = char_I_deco_gas_change[g]; |
126 | 1168 } |
116 | 1169 |
197 | 1170 const_ppO2 = char_I_const_ppO2 * 0.01; |
1171 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
1172 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
1173 GF_low = char_I_GF_Low_percentage * 0.01; | |
1174 GF_high = char_I_GF_High_percentage * 0.01; | |
126 | 1175 GF_delta = GF_high - GF_low; |
116 | 1176 } |
1177 | |
167 | 1178 ////////////////////////////////////////////////////////////////////////////// |
171 | 1179 // |
1180 // | |
116 | 1181 void calc_hauptroutine_update_tissues(void) |
1182 { | |
197 | 1183 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
1184 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
1185 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
237 | 1186 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
197 | 1187 |
276 | 1188 pres_diluent = pres_respiration; |
307 | 1189 if( char_I_const_ppO2 != 0 ) // new in v.101 |
186 | 1190 { |
322 | 1191 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
1192 | |
276 | 1193 pres_diluent -= const_ppO2; // new in v.101 |
1194 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
321 | 1195 if( pres_diluent < 0.0 ) |
1196 pres_diluent = 0.0; | |
276 | 1197 if( pres_diluent > pres_respiration ) // new in v.101 |
1198 pres_diluent = pres_respiration; // new in v.101 | |
307 | 1199 |
321 | 1200 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
322 | 1201 |
326 | 1202 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
322 | 1203 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
1204 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
186 | 1205 } |
307 | 1206 |
310
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1207 if( pres_diluent > ppWater ) // new in v.101 |
116 | 1208 { |
307 | 1209 overlay float EAD, END; |
1210 | |
310
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1211 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1212 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
307 | 1213 |
1214 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
1215 // with plain air. | |
310
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1216 // ppN2 = 79% * (P_EAD - ppWater) |
307 | 1217 // EAD = (P_EAD - Psurface) * 10 |
310
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1218 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
317 | 1219 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
307 | 1220 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
317 | 1221 char_O_EAD = (unsigned char)(EAD + 0.5); |
307 | 1222 |
1223 // END : Equivalent Narcotic Dive. | |
1224 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
1225 // 0.23 btw). Hence the formula becomes: | |
310
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1226 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
317 | 1227 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
307 | 1228 // |
1229 // Source cited: | |
1230 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
1231 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
317 | 1232 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
307 | 1233 if( END < 0.0 || END > 245.5 ) END = 0.0; |
317 | 1234 char_O_END = (unsigned char)(END + 0.5); |
116 | 1235 } |
167 | 1236 else // new in v.101 |
116 | 1237 { |
236 | 1238 ppN2 = 0.0; // new in v.101 |
200 | 1239 ppHe = 0.0; // new in v.101 |
307 | 1240 char_O_EAD = char_O_END = 0; |
116 | 1241 } |
1242 | |
1243 if(!char_I_step_is_1min) | |
192 | 1244 calc_tissue(0); |
116 | 1245 else |
192 | 1246 calc_tissue(1); |
186 | 1247 |
192 | 1248 // Calc limit for surface, ie. GF_high. |
258 | 1249 calc_limit(); |
186 | 1250 |
203 | 1251 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
339 | 1252 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
171 | 1253 } |
1254 | |
116 | 1255 |
167 | 1256 ////////////////////////////////////////////////////////////////////////////// |
169
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1257 // Compute stops. |
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1258 // |
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1259 // Note: because this can be very long, break on 16 iterations, and set state |
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1260 // to 0 when finished, or to 1 when needing to continue. |
334
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1261 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
257
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1262 // break the loop when total time > 512msec. |
169
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1263 // |
116 | 1264 void calc_hauptroutine_calc_deco(void) |
1265 { | |
169
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1266 overlay unsigned char loop; |
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1267 |
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1268 for(loop = 0; loop < 16; ++loop) |
116 | 1269 { |
257
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1270 // Limit loops to 512ms, using the RTC timer 3: |
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1271 if( tmr3() & (512*32) ) |
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1272 break; |
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1273 |
241 | 1274 // Do not ascent while doing a gas switch ? |
203 | 1275 if( sim_gas_delay <= sim_dive_mins ) |
1276 { | |
241 | 1277 if( calc_nextdecodepth() ) |
1278 { | |
1279 if( temp_depth_limit == 0 ) | |
1280 goto Surface; | |
116 | 1281 |
241 | 1282 //---- We hit a stop at temp_depth_limit --------------------- |
317 | 1283 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
241 | 1284 + pres_surface; // To absolute. |
471 | 1285 if( !update_deco_table() ) // Adds a one minute stops. |
1286 goto Surface; // Deco table full: abort... | |
241 | 1287 } |
1288 else | |
1289 { | |
1290 //---- No stop ----------------------------------------------- | |
317 | 1291 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
169
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1292 |
241 | 1293 //---- Finish computations once surface is reached ----------- |
1294 if( temp_deco <= pres_surface ) | |
1295 { | |
1296 Surface: | |
471 | 1297 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
312
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1298 copy_deco_table(); |
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1299 |
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1300 calc_ascenttime(); |
471 | 1301 char_O_deco_status = 0; // calc nullzeit next time. |
1302 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
241 | 1303 return; |
1304 } | |
1305 } | |
212 | 1306 } |
1307 else | |
334
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1308 { |
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1309 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1310 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
471 | 1311 if( !update_deco_table() ) // Just pass one minute. |
1312 goto Surface; // Deco table full: abort... | |
334
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1313 } |
197 | 1314 |
241 | 1315 //---- Then update tissue -------------------------------------------- |
203 | 1316 sim_dive_mins++; // Advance simulated time by 1 minute. |
241 | 1317 gas_switch_set(); // Apply any simulated gas change, once validated. |
212 | 1318 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
192 | 1319 sim_tissue(1); // Simulate compartiments for 1 minute. |
116 | 1320 } |
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1321 |
534
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1322 // Surface not reached, need more stops... for menu animation. |
278 | 1323 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
116 | 1324 } |
1325 | |
167 | 1326 ////////////////////////////////////////////////////////////////////////////// |
169
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1327 // Simulation ascention to first deco stop. |
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1328 // |
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1329 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1330 // there is no need to break on more that 16 iterations |
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1331 // (or we are already in deep shit). |
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1332 // |
334
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1333 // Input: pres_respiration |
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1334 // Output: temp_deco |
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1335 // |
312
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1336 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1337 // before ascent. |
169
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1338 void sim_ascent_to_first_stop(void) |
116 | 1339 { |
171 | 1340 update_startvalues(); |
169
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1341 clear_deco_table(); |
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1342 |
200 | 1343 temp_deco = pres_respiration; // Starts from current real depth. |
169
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1344 |
312
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1345 // Are we doing the special @+5min variation ? |
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1346 if(char_O_deco_status & 4) |
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1347 sim_extra_time(); |
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1348 |
212 | 1349 // Do we have a gas switch going on ? |
1350 if( sim_gas_delay > sim_dive_mins ) | |
1351 return; | |
1352 | |
241 | 1353 //---- Loop until first stop, gas switch, or surface is reached ---------- |
169
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1354 for(;;) |
116 | 1355 { |
461 | 1356 overlay float old_deco = temp_deco; // Pamb backup (bars) |
460 | 1357 |
241 | 1358 // Try ascending 1 full minute. |
461 | 1359 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. |
1360 if( temp_deco < pres_surface ) // But don't go over surface. | |
1361 temp_deco = pres_surface; | |
203 | 1362 |
461 | 1363 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because |
1364 // one minute passed. | |
212 | 1365 sim_limit(GF_low); |
1366 | |
1367 // Did we reach deepest remaining stop ? | |
241 | 1368 if( temp_deco < sim_lead_tissue_limit ) |
212 | 1369 { |
461 | 1370 temp_deco = old_deco; // Restore last correct depth, |
1371 break; // Do no spend a minute more. | |
212 | 1372 } |
1373 | |
203 | 1374 // Did we reach surface ? |
460 | 1375 // NOTE: we should round BEFORE checking surface is reached. |
461 | 1376 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
1377 if( temp_depth_limit == 0 ) | |
203 | 1378 { |
1379 temp_deco = pres_surface; // Yes: finished ! | |
1380 break; | |
1381 } | |
169
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1382 |
241 | 1383 // Check for gas change below new depth ? |
1384 if( gas_switch_deepest() ) | |
1385 { | |
334
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1386 assert( temp_depth_limit > 0); |
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1387 |
317 | 1388 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
212 | 1389 break; |
241 | 1390 } |
171 | 1391 |
203 | 1392 sim_dive_mins++; // Advance simulated time by 1 minute. |
241 | 1393 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
203 | 1394 sim_tissue(1); // and update tissues for 1 min. |
1395 } | |
167 | 1396 } |
116 | 1397 |
167 | 1398 ////////////////////////////////////////////////////////////////////////////// |
312
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1399 // Simulation extra time at the current depth. |
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1400 // |
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1401 // This routine is used for @+5min feature. |
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1402 void sim_extra_time(void) |
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1403 { |
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1404 overlay unsigned char extra = read_custom_function(58); |
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1405 do { |
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1406 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1407 sim_tissue(1); // and update tissues for 1 min. |
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1408 } while( --extra != 0 ); |
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1409 } |
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1410 |
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1411 ////////////////////////////////////////////////////////////////////////////// |
167 | 1412 // calc_tissue |
1413 // | |
116 | 1414 // optimized in v.101 |
167 | 1415 // |
184 | 1416 static void calc_tissue(PARAMETER unsigned char period) |
116 | 1417 { |
251 | 1418 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1419 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1420 |
338 | 1421 for (ci=0;ci<NUM_COMP;ci++) |
126 | 1422 { |
258 | 1423 read_buhlmann_times(period); // 2 sec or 1 min period. |
116 | 1424 |
126 | 1425 // N2 |
339 | 1426 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
126 | 1427 temp_tissue_safety(); |
339 | 1428 pres_tissue_N2[ci] += temp_tissue; |
165 | 1429 |
126 | 1430 // He |
339 | 1431 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
126 | 1432 temp_tissue_safety(); |
339 | 1433 pres_tissue_He[ci] += temp_tissue; |
192 | 1434 } |
167 | 1435 } |
116 | 1436 |
167 | 1437 ////////////////////////////////////////////////////////////////////////////// |
192 | 1438 // calc_limit |
167 | 1439 // |
192 | 1440 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
167 | 1441 // |
258 | 1442 static void calc_limit(void) |
167 | 1443 { |
192 | 1444 char_O_gtissue_no = 255; |
1445 calc_lead_tissue_limit = 0.0; | |
1446 | |
338 | 1447 for(ci=0; ci<NUM_COMP;ci++) |
192 | 1448 { |
339 | 1449 overlay float N2 = pres_tissue_N2[ci]; |
1450 overlay float He = pres_tissue_He[ci]; | |
293
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1451 overlay float p = N2 + He; |
192 | 1452 |
258 | 1453 read_buhlmann_coefficients(); |
293
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1454 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1455 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
116 | 1456 |
192 | 1457 // Apply the Eric Baker's varying gradient factor correction. |
1458 // Note: the correction factor depends both on GF and b, | |
1459 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1460 // so that can change who is the leading gas... | |
1461 // Note: Also depends of the GF. So the calcul is different for | |
1462 // GF_low, current GF, or GF_high... | |
1463 // *BUT* calc_tissue() is used to compute bottom time, | |
1464 // hence what would happend at surface, | |
1465 // hence at GF_high. | |
509 | 1466 if( char_I_deco_model != 0 ) |
258 | 1467 p = ( p - var_N2_a * GF_high) * var_N2_b |
1468 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
192 | 1469 else |
1470 p = (p - var_N2_a) * var_N2_b; | |
258 | 1471 if( p < 0.0 ) p = 0.0; |
192 | 1472 |
1473 if( p > calc_lead_tissue_limit ) | |
1474 { | |
1475 char_O_gtissue_no = ci; | |
1476 calc_lead_tissue_limit = p; | |
1477 } | |
1478 } | |
197 | 1479 |
338 | 1480 assert( char_O_gtissue_no < NUM_COMP ); |
197 | 1481 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
167 | 1482 } |
1483 | |
1484 ////////////////////////////////////////////////////////////////////////////// | |
1485 // calc_nullzeit | |
1486 // | |
1487 // calculates the remaining bottom time | |
1488 // | |
511
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1489 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second |
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1490 // exponential term to the M-value equation, making it impossible to |
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1491 // invert... So we have to make a fast-simu until we find a better way. |
509 | 1492 // |
1493 // Input: pres_respiration | |
1494 // Output: char_O_nullzeit | |
167 | 1495 // |
1496 static void calc_nullzeit(void) | |
1497 { | |
511
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1498 //---- Compute ppN2 and ppHe --------------------------------------------- |
509 | 1499 temp_deco = pres_respiration; |
1500 sim_alveolar_presures(); | |
167 | 1501 |
509 | 1502 char_O_nullzeit = 240; |
1503 for(ci=0; ci<NUM_COMP; ci++) | |
1504 { | |
511
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1505 //---- Read A/B values and loading factor for N2 and He -------------- |
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1506 overlay float tN2 = pres_tissue_N2[ci]; |
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1507 overlay float tHe = pres_tissue_He[ci]; |
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1508 overlay float t = tN2 + tHe; |
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1509 overlay unsigned char ndl; |
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1510 overlay unsigned char period = 10; |
192 | 1511 |
509 | 1512 read_buhlmann_coefficients(); |
511
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1513 read_buhlmann_times(2); // Starts with a 10min period. |
509 | 1514 |
511
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1515 //---- Simulate for that tissue -------------------------------------- |
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1516 // NOTE: No need to simulate for longuer than the already found NDL. |
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1517 for(ndl=0; ndl<char_O_nullzeit;) |
509 | 1518 { |
511
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1519 //---- Compute updated mix M-value at surface |
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1520 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; |
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1521 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; |
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1522 overlay float M0 = (a + pres_surface/b); |
116 | 1523 |
511
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1524 //---- Add 10min/1min to N2/He tissues |
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1525 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; |
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1526 overlay float dTHe = (ppHe - tHe) * var_He_e; |
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1527 |
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1528 //---- Apply security margin when using the non-GF model |
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1529 if( char_I_deco_model == 0 ) |
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1530 { |
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1531 dTN2 *= float_saturation_multiplier; |
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1532 dTHe *= float_saturation_multiplier; |
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1533 } |
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1534 else // Or GF-based model |
509 | 1535 M0 = GF_high * (M0 - pres_surface) + pres_surface; |
167 | 1536 |
511
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1537 //---- Simulate off-gasing while going to surface |
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1538 // TODO ! |
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1539 // dTN2 -= exp( ... ascent time ... ppN2...) |
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1540 // dTHe -= exp( ... ascent time ... ppHe...) |
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1541 |
534
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1542 //---- Ok now, and still ok to surface after 1 or 10 minutes ? |
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1543 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) |
509 | 1544 { |
511
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1545 tN2 += dTN2; // YES: apply gas loadings, |
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1546 tHe += dTHe; |
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1547 t = tN2 + tHe; |
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1548 ndl += period; // increment NDL, |
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1549 continue; // and loop. |
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1550 } |
116 | 1551 |
511
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1552 //---- Should we retry with smaller steps ? |
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1553 if( period == 10 ) |
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1554 { |
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1555 read_buhlmann_times(1); // 1min coefs. |
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1556 period = 1; |
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1557 continue; |
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1558 } |
167 | 1559 |
511
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1560 //---- ELSE make a linear approx for the last minute |
524 | 1561 // Usefull to have a meaningfull rounding of NDL. |
1562 // But ONLY it positive (negativ casted to unsigned is bad). | |
1563 if( M0 > t ) | |
1564 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
511
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1565 break; |
509 | 1566 } |
511
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1567 |
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1568 // Keep the shortest NDL found |
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1569 if( ndl < char_O_nullzeit ) |
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1570 char_O_nullzeit = ndl; |
339 | 1571 } |
167 | 1572 } |
116 | 1573 |
167 | 1574 ////////////////////////////////////////////////////////////////////////////// |
1575 // calc_ascenttime | |
1576 // | |
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1577 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1578 // and all stops. |
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1579 // |
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1580 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
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1581 static void calc_ascenttime(void) |
116 | 1582 { |
323 | 1583 overlay unsigned char x; |
1584 overlay unsigned short sum; | |
168 | 1585 |
323 | 1586 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
1587 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
1588 if (ascent < 0.0) | |
1589 ascent = 0.0; | |
1590 sum = (unsigned short)(ascent + 0.99); | |
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1591 |
338 | 1592 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
323 | 1593 sum += (unsigned short)internal_deco_time[x]; |
1594 | |
1595 if( char_O_deco_status == 1 ) | |
1596 int_O_ascenttime = sum; | |
126 | 1597 else |
323 | 1598 int_O_extra_ascenttime = sum; |
167 | 1599 } |
116 | 1600 |
167 | 1601 ////////////////////////////////////////////////////////////////////////////// |
1602 // update_startvalues | |
1603 // | |
116 | 1604 // updated in v.102 |
167 | 1605 // |
116 | 1606 void update_startvalues(void) |
1607 { | |
167 | 1608 overlay unsigned char x; |
116 | 1609 |
201 | 1610 // Start ascent simulation with current tissue partial pressures. |
339 | 1611 for(x=0; x<NUM_COMP; x++) |
116 | 1612 { |
339 | 1613 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
1614 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
116 | 1615 } |
197 | 1616 |
201 | 1617 // No leading tissue (yet) for this ascent simulation. |
197 | 1618 sim_lead_tissue_limit = 0.0; |
1619 sim_lead_tissue_no = 255; | |
167 | 1620 } |
116 | 1621 |
167 | 1622 ////////////////////////////////////////////////////////////////////////////// |
192 | 1623 // sim_tissue |
167 | 1624 // |
116 | 1625 // optimized in v.101 |
167 | 1626 // |
1627 // Function very simular to calc_tissue, but: | |
1628 // + Use a 1min or 10min period. | |
1629 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
184 | 1630 static void sim_tissue(PARAMETER unsigned char period) |
116 | 1631 { |
251 | 1632 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1633 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1634 |
338 | 1635 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1636 { |
258 | 1637 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
165 | 1638 |
126 | 1639 // N2 |
339 | 1640 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
126 | 1641 temp_tissue_safety(); |
339 | 1642 sim_pres_tissue_N2[ci] += temp_tissue; |
126 | 1643 |
1644 // He | |
339 | 1645 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
126 | 1646 temp_tissue_safety(); |
339 | 1647 sim_pres_tissue_He[ci] += temp_tissue; |
192 | 1648 } |
167 | 1649 } |
116 | 1650 |
167 | 1651 ////////////////////////////////////////////////////////////////////////////// |
192 | 1652 // sim_limit() |
1653 // | |
1654 // New in v.111 | |
1655 // | |
1656 // Function separated from sim_tissue() to allow recomputing limit on | |
1657 // different depth, because it depends on current gradient factor. | |
167 | 1658 // |
192 | 1659 static void sim_limit(PARAMETER float GF_current) |
116 | 1660 { |
212 | 1661 assert( 0.0 < GF_current && GF_current <= 1.0f); |
1662 | |
192 | 1663 sim_lead_tissue_limit = 0.0; |
212 | 1664 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
192 | 1665 |
338 | 1666 for(ci=0; ci<NUM_COMP; ci++) |
192 | 1667 { |
339 | 1668 overlay float N2 = sim_pres_tissue_N2[ci]; |
1669 overlay float He = sim_pres_tissue_He[ci]; | |
241 | 1670 overlay float p = N2 + He; |
192 | 1671 |
258 | 1672 read_buhlmann_coefficients(); |
241 | 1673 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
1674 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
192 | 1675 |
1676 // Apply the Eric Baker's varying gradient factor correction. | |
1677 // Note: the correction factor depends both on GF and b, | |
1678 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1679 // so that can change who is the leading gas... | |
1680 // Note: Also depends of the GF_current... | |
509 | 1681 if( char_I_deco_model != 0 ) |
302 | 1682 p = ( p - var_N2_a * GF_current) |
1683 / (GF_current / var_N2_b + 1.0 - GF_current); | |
192 | 1684 else |
1685 p = (p - var_N2_a) * var_N2_b; | |
1686 | |
1687 if( p > sim_lead_tissue_limit ) | |
1688 { | |
1689 sim_lead_tissue_no = ci; | |
1690 sim_lead_tissue_limit = p; | |
1691 } | |
1692 } // for ci | |
197 | 1693 |
338 | 1694 assert( sim_lead_tissue_no < NUM_COMP ); |
237 | 1695 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
167 | 1696 } |
116 | 1697 |
167 | 1698 ////////////////////////////////////////////////////////////////////////////// |
169
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1699 // clear_deco_table |
167 | 1700 // |
1701 // unchanged in v.101 | |
1702 // | |
169
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1703 static void clear_deco_table(void) |
116 | 1704 { |
169
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1705 overlay unsigned char x; |
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1706 |
338 | 1707 for(x=0; x<NUM_STOPS; ++x) |
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1708 { |
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1709 internal_deco_time [x] = 0; |
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1710 internal_deco_depth[x] = 0; |
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1711 } |
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1712 } |
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1713 |
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1714 ////////////////////////////////////////////////////////////////////////////// |
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1715 // update_deco_table |
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1716 // |
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1717 // Add 1 min to current stop. |
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1718 // |
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1719 // Inputs: |
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1720 // temp_depth_limit = stop's depth, in meters. |
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1721 // In/Out: |
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1722 // internal_deco_depth[] : depth (in metres) of each stops. |
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1723 // internal_deco_time [] : time (in minutes) of each stops. |
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1724 // |
471 | 1725 static unsigned char update_deco_table() |
169
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1726 { |
192 | 1727 overlay unsigned char x; |
247
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1728 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1729 assert( temp_depth_limit > 0 ); // No stop at surface... |
169
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1730 |
338 | 1731 for(x=0; x<NUM_STOPS; ++x) |
192 | 1732 { |
212 | 1733 // Make sure deco-stops are recorded in order: |
334
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1734 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
212 | 1735 |
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1736 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
192 | 1737 { |
1738 // Do not overflow (max 255') | |
1739 if( internal_deco_time[x] < 255 ) | |
1740 { | |
1741 internal_deco_time[x]++; | |
471 | 1742 return 1; |
192 | 1743 } |
1744 // But store extra in the next stop... | |
169
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1745 } |
192 | 1746 |
169
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1747 if( internal_deco_depth[x] == 0 ) |
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1748 { |
192 | 1749 internal_deco_depth[x] = temp_depth_limit; |
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1750 if( sim_gas_delay >= sim_dive_mins ) |
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1751 internal_deco_depth[x] |= 0x80; |
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1752 |
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1753 internal_deco_time[x] = 1; |
471 | 1754 return 1; |
169
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1755 } |
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1756 } |
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1757 |
192 | 1758 // Can't store stops at more than 96m. |
1759 // Or stops at less that 3m too. | |
169
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1760 // Just do nothing with that... |
471 | 1761 return 0; |
167 | 1762 } |
116 | 1763 |
167 | 1764 ////////////////////////////////////////////////////////////////////////////// |
1765 // calc_gradient_factor | |
1766 // | |
165 | 1767 // optimized in v.101 (var_N2_a) |
116 | 1768 // new code in v.102 |
167 | 1769 // |
1770 static void calc_gradient_factor(void) | |
116 | 1771 { |
197 | 1772 overlay float gf; |
339 | 1773 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
1774 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
237 | 1775 |
338 | 1776 assert( char_O_gtissue_no < NUM_COMP ); |
237 | 1777 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
197 | 1778 |
293
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1779 // tissue > respiration (currently off-gasing) |
302 | 1780 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
1781 // GF = 100% when respiration == limit. | |
293
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1782 temp_tissue = N2 + He; |
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1783 if( temp_tissue <= pres_respiration ) |
197 | 1784 gf = 0.0; |
1785 else | |
1786 { | |
293
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1787 overlay float limit = calc_lead_tissue_limit; |
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1788 // NOTE: in GF model, calc_lead_tissue_limit include already the |
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1789 // correction due to gradient factor. To compute the actual |
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1790 // current GF, we need to (re-)compute the raw ambiant-pressure |
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1791 // limit from the Bühlmann model. |
509 | 1792 if( char_I_deco_model != 0 ) |
293
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1793 { |
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1794 ci = char_O_gtissue_no; |
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1795 read_buhlmann_coefficients(); |
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1796 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1797 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1798 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1799 } |
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1800 |
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1801 gf = (temp_tissue - pres_respiration) |
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1802 / (temp_tissue - limit) |
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1803 * 100.0; |
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1804 if( gf > 254.5 ) gf = 255.0; |
197 | 1805 if( gf < 0.0 ) gf = 0.0; |
1806 } | |
293
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1807 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
116 | 1808 |
509 | 1809 if( char_I_deco_model != 0 ) // calculate relative gradient factor |
116 | 1810 { |
197 | 1811 overlay float rgf; |
1812 | |
562 | 1813 if( low_depth < 3 ) |
197 | 1814 rgf = GF_high; |
1815 else | |
1816 { | |
317 | 1817 overlay float temp1 = low_depth * METER_TO_BAR; |
197 | 1818 overlay float temp2 = pres_respiration - pres_surface; |
186 | 1819 |
197 | 1820 if (temp2 <= 0) |
1821 rgf = GF_high; | |
1822 else if (temp2 >= temp1) | |
1823 rgf = GF_low; | |
1824 else | |
1825 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
1826 } | |
186 | 1827 |
197 | 1828 rgf = gf / rgf; // gf is already in percent |
1829 if( rgf < 0.0 ) rgf = 0.0; | |
293
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1830 if( rgf > 254.5 ) rgf = 255.0; |
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1831 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
116 | 1832 } // calc relative gradient factor |
1833 else | |
1834 { | |
186 | 1835 char_O_relative_gradient_GF = char_O_gradient_factor; |
116 | 1836 } |
167 | 1837 } |
116 | 1838 |
167 | 1839 ////////////////////////////////////////////////////////////////////////////// |
1840 // deco_calc_desaturation_time | |
1841 // | |
116 | 1842 // FIXED N2_ratio |
1843 // unchanged in v.101 | |
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1844 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
233 | 1845 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
167 | 1846 // |
116 | 1847 void deco_calc_desaturation_time(void) |
1848 { | |
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1849 RESET_C_STACK |
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1850 |
233 | 1851 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1852 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1853 | |
237 | 1854 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
233 | 1855 pres_surface = int_I_pres_surface * 0.001; |
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1856 ppN2 = N2_ratio * (pres_surface - ppWater); |
126 | 1857 int_O_desaturation_time = 0; |
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1858 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
233 | 1859 |
339 | 1860 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1861 { |
251 | 1862 overlay unsigned short desat_time; // For a particular compartiment, in min. |
1863 overlay float temp1; | |
1864 overlay float temp2; | |
1865 overlay float temp3; | |
1866 overlay float temp4; | |
338 | 1867 |
509 | 1868 read_buhlmann_ht(); |
338 | 1869 |
126 | 1870 // saturation_time (for flight) and N2_saturation in multiples of halftime |
1871 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
1872 // 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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1873 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
126 | 1874 // N2 |
339 | 1875 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
1876 temp2 = ppN2 - pres_tissue_N2[ci]; | |
126 | 1877 if (temp2 >= 0.0) |
233 | 1878 temp1 = 0.0; |
126 | 1879 else |
1880 temp1 = temp1 / temp2; | |
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1881 |
251 | 1882 if( 0.0 < temp1 && temp1 < 1.0 ) |
126 | 1883 { |
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1884 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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1885 // minus because log is negative. |
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1886 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
509 | 1887 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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1888 |
126 | 1889 } |
1890 else | |
1891 { | |
233 | 1892 temp1 = 0.0; |
1893 temp2 = 0.0; | |
126 | 1894 } |
116 | 1895 |
126 | 1896 // He |
339 | 1897 temp3 = 0.1 - pres_tissue_He[ci]; |
126 | 1898 if (temp3 >= 0.0) |
233 | 1899 temp3 = 0.0; |
126 | 1900 else |
339 | 1901 temp3 = - temp3 / pres_tissue_He[ci]; |
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1902 |
251 | 1903 if( 0.0 < temp3 && temp3 < 1.0 ) |
126 | 1904 { |
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1905 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
126 | 1906 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
1907 // minus because log is negative | |
509 | 1908 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
126 | 1909 } |
1910 else | |
1911 { | |
233 | 1912 temp3 = 0.0; |
1913 temp4 = 0.0; | |
126 | 1914 } |
116 | 1915 |
126 | 1916 // saturation_time (for flight) |
1917 if (temp4 > temp2) | |
203 | 1918 desat_time = (unsigned short)temp4; |
126 | 1919 else |
203 | 1920 desat_time = (unsigned short)temp2; |
252 | 1921 |
251 | 1922 if(desat_time > int_O_desaturation_time) |
1923 int_O_desaturation_time = desat_time; | |
116 | 1924 |
126 | 1925 // N2 saturation in multiples of halftime for display purposes |
339 | 1926 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1927 temp2 = temp2 + 80.0; // set center | |
126 | 1928 if (temp2 < 0.0) |
1929 temp2 = 0.0; | |
1930 if (temp2 > 255.0) | |
1931 temp2 = 255.0; | |
339 | 1932 char_O_tissue_N2_saturation[ci] = (char)temp2; |
233 | 1933 |
126 | 1934 // He saturation in multiples of halftime for display purposes |
339 | 1935 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1936 temp4 = temp4 + 80.0; // set center | |
126 | 1937 if (temp4 < 0.0) |
1938 temp4 = 0.0; | |
1939 if (temp4 > 255.0) | |
1940 temp4 = 255.0; | |
339 | 1941 char_O_tissue_He_saturation[ci] = (char)temp4; |
126 | 1942 } // for |
167 | 1943 } |
116 | 1944 |
167 | 1945 ////////////////////////////////////////////////////////////////////////////// |
1946 // calc_wo_deco_step_1_min | |
1947 // | |
116 | 1948 // FIXED N2 Ratio |
1949 // optimized in v.101 (...saturation_multiplier) | |
1950 // desaturation slowed down to 70,42% | |
167 | 1951 // |
1952 static void calc_wo_deco_step_1_min(void) | |
116 | 1953 { |
251 | 1954 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1955 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
1956 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
1957 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1958 | |
126 | 1959 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
368 | 1960 pres_respiration = pres_surface = int_I_pres_surface * 0.001; |
1961 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
200 | 1962 ppHe = 0.0; |
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1963 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
197 | 1964 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
126 | 1965 |
339 | 1966 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
167 | 1967 |
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1968 clear_deco_table(); |
200 | 1969 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
126 | 1970 char_O_nullzeit = 0; |
168 | 1971 int_O_ascenttime = 0; |
323 | 1972 int_O_extra_ascenttime = 0; |
126 | 1973 calc_gradient_factor(); |
167 | 1974 } |
126 | 1975 |
167 | 1976 ////////////////////////////////////////////////////////////////////////////// |
368 | 1977 // calc_dive_interval |
1978 // | |
1979 // Prepare tissue for delay before the next dive simulation. | |
1980 // | |
1981 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
1982 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
1983 // | |
1984 // Should be protected by deco_push_tissues_to_vault(), | |
1985 // deco_pull_tissues_from_vault() | |
1986 // | |
1987 // desaturation slowed down to 70,42%. | |
1988 // | |
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1989 static void calc_dive_interval(void) |
368 | 1990 { |
1991 overlay unsigned char t; | |
491
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1992 overlay unsigned char backup_model; |
368 | 1993 |
1994 //---- Initialize simulation parameters ---------------------------------- | |
1995 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
1996 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
1997 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
1998 ppHe = 0.0; | |
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1999 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
368 | 2000 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
2001 | |
568 | 2002 // Make sure SURFACE_DESAT_FACTOR is applied: |
491
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2003 backup_model = char_I_deco_model; |
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2004 char_I_deco_model = 0; |
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2005 |
368 | 2006 //---- Perform simulation ------------------------------------------------ |
2007 for(t=0; t<char_I_dive_interval; ++t) | |
2008 { | |
2009 calc_tissue(2); // period = 10min. | |
2010 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
2011 } | |
514 | 2012 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
2013 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); | |
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2014 |
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2015 //---- Restore model ----------------------------------------------------- |
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2016 char_I_deco_model = backup_model; |
368 | 2017 } |
2018 | |
2019 ////////////////////////////////////////////////////////////////////////////// | |
167 | 2020 ////////////////////////////////////////////////////////////////////////////// |
2021 ////////////////////////////////// deco_hash ///////////////////////////////// | |
2022 ////////////////////////////////////////////////////////////////////////////// | |
2023 ////////////////////////////////////////////////////////////////////////////// | |
126 | 2024 |
184 | 2025 #ifndef CROSS_COMPILE |
116 | 2026 void deco_hash(void) |
2027 { | |
167 | 2028 overlay unsigned char md_i, md_j; // Loop index. |
2029 overlay unsigned char md_t; | |
2030 overlay unsigned char md_buffer[16]; | |
2031 overlay unsigned char md_temp; | |
203 | 2032 overlay unsigned short md_pointer; |
167 | 2033 |
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2034 RESET_C_STACK |
126 | 2035 |
2036 // init | |
164 | 2037 for(md_i=0;md_i<16;md_i++) |
126 | 2038 { |
2039 md_state[md_i] = 0; | |
164 | 2040 char_O_hash[md_i] = 0; |
126 | 2041 } // for md_i 16 |
116 | 2042 |
126 | 2043 _asm |
167 | 2044 movlw 0x01 // md_pi address. |
2045 movwf TBLPTRU,0 | |
2046 movlw 0x7E | |
2047 movwf TBLPTRH,0 | |
2048 movlw 0x00 | |
2049 movwf TBLPTRL,0 | |
126 | 2050 _endasm; |
165 | 2051 md_i = 0; |
2052 do { | |
126 | 2053 _asm |
2054 TBLRDPOSTINC | |
2055 movff TABLAT,md_temp | |
2056 _endasm | |
165 | 2057 md_pi_subst[md_i++] = md_temp; |
2058 } while( md_i != 0 ); | |
2059 | |
126 | 2060 _asm |
167 | 2061 movlw 0x00 |
2062 movwf TBLPTRU,0 | |
2063 movlw 0x00 | |
2064 movwf TBLPTRH,0 | |
2065 movlw 0x00 | |
2066 movwf TBLPTRL,0 | |
126 | 2067 _endasm |
167 | 2068 |
126 | 2069 // cycle buffers |
2070 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
2071 { | |
2072 md_t = 0; | |
2073 for (md_i=0;md_i<16;md_i++) | |
2074 { | |
2075 if(md_pointer == 9) | |
164 | 2076 md_temp = char_O_hash[md_i]; |
126 | 2077 else |
2078 { | |
2079 _asm | |
167 | 2080 TBLRDPOSTINC |
2081 movff TABLAT,md_temp | |
126 | 2082 _endasm |
2083 } // else | |
167 | 2084 |
2085 md_buffer[md_i] = md_temp; | |
186 | 2086 md_state[md_i+16] = md_temp; |
2087 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
126 | 2088 } // for md_i 16 |
2089 | |
2090 for (md_i=0;md_i<18;md_i++) | |
2091 { | |
2092 for (md_j=0;md_j<48;md_j++) | |
2093 { | |
167 | 2094 md_state[md_j] ^= md_pi_subst[md_t]; |
126 | 2095 md_t = md_state[md_j]; |
2096 } // for md_j 48 | |
2097 md_t = (unsigned char)(md_t+1); | |
2098 } // for md_i 18 | |
164 | 2099 md_t = char_O_hash[15]; |
126 | 2100 |
2101 for (md_i=0;md_i<16;md_i++) | |
2102 { | |
167 | 2103 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
164 | 2104 md_t = char_O_hash[md_i]; |
126 | 2105 } // for md_i 16 |
2106 } // for md_pointer | |
116 | 2107 } // void deco_hash(void) |
184 | 2108 #endif |
116 | 2109 |
167 | 2110 ////////////////////////////////////////////////////////////////////////////// |
2111 // deco_clear_CNS_fraction | |
2112 // | |
116 | 2113 // new in v.101 |
167 | 2114 // |
116 | 2115 void deco_clear_CNS_fraction(void) |
2116 { | |
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2117 RESET_C_STACK |
237 | 2118 |
126 | 2119 CNS_fraction = 0.0; |
2120 char_O_CNS_fraction = 0; | |
167 | 2121 } |
116 | 2122 |
167 | 2123 ////////////////////////////////////////////////////////////////////////////// |
2124 // deco_calc_CNS_fraction | |
2125 // | |
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2126 // Input: char_I_actual_ppO2 : Current condition (in decibars). |
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2127 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. |
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2128 // CNS_fraction : velue before period. |
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2129 // Output: CNS_fraction, char_O_CNS_fraction |
167 | 2130 // |
116 | 2131 void deco_calc_CNS_fraction(void) |
2132 { | |
292 | 2133 overlay float time_factor = 1.0f; |
126 | 2134 RESET_C_STACK |
167 | 2135 |
471 | 2136 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2137 assert( char_I_actual_ppO2 > 15 ); |
2138 | |
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2139 if( char_I_step_is_1min == 1 ) |
292 | 2140 time_factor = 30.0f; |
439
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2141 else if( char_I_step_is_1min == 2 ) |
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2142 time_factor = 300.0f; |
116 | 2143 |
126 | 2144 if (char_I_actual_ppO2 < 50) |
292 | 2145 ; // no changes |
126 | 2146 else if (char_I_actual_ppO2 < 60) |
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2147 CNS_fraction += time_factor/(-540.0 * char_I_actual_ppO2 + 54000.0); |
126 | 2148 else if (char_I_actual_ppO2 < 70) |
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2149 CNS_fraction += time_factor/(-450.0 * char_I_actual_ppO2 + 48600.0); |
126 | 2150 else if (char_I_actual_ppO2 < 80) |
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2151 CNS_fraction += time_factor/(-360.0 * char_I_actual_ppO2 + 42300.0); |
126 | 2152 else if (char_I_actual_ppO2 < 90) |
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2153 CNS_fraction += time_factor/(-270.0 * char_I_actual_ppO2 + 35100.0); |
126 | 2154 else if (char_I_actual_ppO2 < 110) |
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2155 CNS_fraction += time_factor/(-180.0 * char_I_actual_ppO2 + 27000.0); |
126 | 2156 else if (char_I_actual_ppO2 < 150) |
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2157 CNS_fraction += time_factor/( -90.0 * char_I_actual_ppO2 + 17100.0); |
126 | 2158 else if (char_I_actual_ppO2 < 160) |
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2159 CNS_fraction += time_factor/(-225.0 * char_I_actual_ppO2 + 37350.0); |
126 | 2160 else if (char_I_actual_ppO2 < 165) |
292 | 2161 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 | 2162 else if (char_I_actual_ppO2 < 170) |
292 | 2163 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
126 | 2164 else if (char_I_actual_ppO2 < 175) |
292 | 2165 CNS_fraction += time_factor*0.00136; |
126 | 2166 else if (char_I_actual_ppO2 < 180) |
292 | 2167 CNS_fraction += time_factor*0.00180; |
126 | 2168 else if (char_I_actual_ppO2 < 185) |
292 | 2169 CNS_fraction += time_factor*0.00237; |
126 | 2170 else if (char_I_actual_ppO2 < 190) |
292 | 2171 CNS_fraction += time_factor*0.00310; |
126 | 2172 else if (char_I_actual_ppO2 < 195) |
292 | 2173 CNS_fraction += time_factor*0.00401; |
126 | 2174 else if (char_I_actual_ppO2 < 200) |
292 | 2175 CNS_fraction += time_factor*0.00517; |
126 | 2176 else if (char_I_actual_ppO2 < 230) |
292 | 2177 CNS_fraction += time_factor*0.0209; |
126 | 2178 else |
292 | 2179 CNS_fraction += time_factor*0.0482; // value for 2.5 |
116 | 2180 |
514 | 2181 if( CNS_fraction > 2.5 ) |
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2182 CNS_fraction = 2.55; |
514 | 2183 if( CNS_fraction < 0.0 ) |
126 | 2184 CNS_fraction = 0.0; |
2185 | |
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2186 char_O_CNS_fraction = (unsigned char)(100.0 * CNS_fraction + 0.5); |
167 | 2187 } |
116 | 2188 |
167 | 2189 ////////////////////////////////////////////////////////////////////////////// |
439
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2190 // deco_calc_CNS_planning |
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2191 // |
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2192 // Compute CNS during predicted ascent. |
488 | 2193 // |
2194 // Note: Needs a call to deco_push_tissues_to_vault(), | |
2195 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
2196 // | |
2197 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
2198 // Output: CNS_fraction, char_O_CNS_fraction | |
2199 // | |
439
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2200 void deco_calc_CNS_planning(void) |
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2201 { |
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2202 overlay unsigned char backup_gas_last_depth; |
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2203 overlay unsigned char backup_gas_last_used; |
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2204 overlay unsigned short backup_gas_delay; |
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2205 overlay unsigned short backup_dive_mins; |
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2206 overlay unsigned char backup_actual_ppO2; |
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2207 |
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2208 RESET_C_STACK |
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2209 |
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2210 // Backup state machine |
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2211 backup_gas_last_depth = sim_gas_last_depth; |
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2212 backup_gas_last_used = sim_gas_last_used; |
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2213 backup_gas_delay = sim_gas_delay; |
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2214 backup_dive_mins = sim_dive_mins; |
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2215 backup_actual_ppO2 = char_I_actual_ppO2; |
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2216 |
439
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2217 // Uses 1min CNS period: |
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2218 char_I_step_is_1min = 1; |
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2219 |
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2220 //---- Retrieve bottom Gas used, and set variables. |
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2221 sim_gas_last_used = char_I_first_gas; |
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2222 sim_gas_last_depth = 0; // Surface gas marker. |
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2223 gas_switch_set(); // Sets initial calc_N2/He_ratio |
439
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2224 |
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2225 //---- CCR mode : do the full TTS at once -------------------------------- |
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2226 if( char_I_const_ppO2 != 0 ) |
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2227 { |
443
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2228 overlay unsigned short t; // Needs 16bits here ! |
439
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2229 char_I_actual_ppO2 = char_I_const_ppO2; |
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2230 for(t=0; t<int_O_ascenttime; ++t) |
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2231 deco_calc_CNS_fraction(); |
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2232 } |
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2233 else //---- OC mode : have to follow all gas switches... ----------------- |
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2234 { |
443
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2235 overlay unsigned char i = 0; // Decostop loop counter |
439
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2236 overlay float actual_ppO2; |
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2237 overlay unsigned char time, t; |
563 | 2238 overlay unsigned char deepest_first = (read_custom_function(54) == 0); |
439
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2239 |
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2240 //---- Ascent to surface delay |
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2241 // NOTE: count as if time is spent with bottom pressure, |
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2242 // AND the bottom gas |
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2243 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) |
439
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2244 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2245 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2246 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2247 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2248 |
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2249 // Ascent time (rounded up): |
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2250 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); |
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2251 |
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2252 for(t=0; t<time; ++t) |
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2253 { |
439
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2254 deco_calc_CNS_fraction(); |
490
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2255 sim_dive_mins++; |
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2256 } |
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2257 |
563 | 2258 //---- Do all further stops ------------------------------------------ |
439
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2259 for(i=0; i<NUM_STOPS; ++i) |
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2260 { |
563 | 2261 overlay unsigned char switch_gas; |
2262 | |
2263 //---- Get next stop, possibly in reverse order ------------------ | |
2264 if( deepest_first ) | |
2265 { | |
2266 time = char_O_deco_time[i]; | |
2267 temp_depth_limit = char_O_deco_depth[i]; | |
2268 } | |
2269 else | |
2270 { | |
2271 time = char_O_deco_time[(NUM_STOPS-1)-i]; | |
2272 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i]; | |
2273 } | |
2274 if( time == 0 ) continue; | |
439
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2275 |
563 | 2276 //---- Gas Switch ? ---------------------------------------------- |
2277 switch_gas = temp_depth_limit & 0x80; // Switch flag. | |
2278 temp_depth_limit &= 0x7F; // True stop depth. | |
2279 | |
2280 if( switch_gas ) | |
2281 { | |
2282 gas_switch_deepest(); | |
2283 gas_switch_set(); | |
2284 } | |
2285 | |
2286 //---- Convert Depth and N2_ratio to ppO2 ------------------------ | |
541
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2287 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) |
439
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2288 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2289 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2290 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2291 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2292 |
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2293 //---- Apply the stop |
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2294 for(t=0; t<time; ++t) |
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2295 { |
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2296 deco_calc_CNS_fraction(); |
490
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2297 sim_dive_mins++; |
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2298 } |
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2299 } |
488 | 2300 } |
2301 | |
563 | 2302 //---- Back to normal mode... -------------------------------------------- |
488 | 2303 char_I_step_is_1min = 0; |
490
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2304 sim_gas_last_depth = backup_gas_last_depth; |
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2305 sim_gas_last_used = backup_gas_last_used; |
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2306 sim_gas_delay = backup_gas_delay; |
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2307 sim_dive_mins = backup_dive_mins; |
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2308 char_I_actual_ppO2 = backup_actual_ppO2; |
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2309 } |
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2310 |
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2311 ////////////////////////////////////////////////////////////////////////////// |
167 | 2312 // deco_calc_CNS_decrease_15min |
2313 // | |
116 | 2314 // new in v.101 |
167 | 2315 // |
116 | 2316 // calculates the half time of 90 minutes in 6 steps of 15 min |
200 | 2317 // (Used in sleepmode, for low battery mode). |
167 | 2318 // |
116 | 2319 // Output: char_O_CNS_fraction |
2320 // Uses and Updates: CNS_fraction | |
167 | 2321 // |
116 | 2322 void deco_calc_CNS_decrease_15min(void) |
2323 { | |
237 | 2324 RESET_C_STACK |
514 | 2325 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2326 |
126 | 2327 CNS_fraction = 0.890899 * CNS_fraction; |
514 | 2328 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
167 | 2329 } |
116 | 2330 |
167 | 2331 ////////////////////////////////////////////////////////////////////////////// |
2332 // deco_calc_percentage | |
2333 // | |
116 | 2334 // new in v.101 |
167 | 2335 // |
116 | 2336 // calculates int_I_temp * char_I_temp / 100 |
2337 // output is int_I_temp | |
200 | 2338 // |
2339 // Used to compute NoFly remaining time. | |
222
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2340 // |
116 | 2341 void deco_calc_percentage(void) |
2342 { | |
122
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2343 RESET_C_STACK |
222
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2344 |
237 | 2345 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
564 | 2346 assert( int_I_temp < 5760 ); // Less than 4 days = 96h... |
237 | 2347 |
222
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2348 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
237 | 2349 |
554
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2350 assert( int_I_temp < 5760 ); // Less than 96h too... |
222
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2351 } |
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2352 |
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2353 |
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2354 ////////////////////////////////////////////////////////////////////////////// |
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2355 // deco_gas_volumes |
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2356 // |
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2357 // new in v.111 |
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2358 // |
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2359 // calculates volumes for each gas. |
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2360 // |
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2361 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
240
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2362 // Gas list. |
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2363 // char_I_first_gas is the bottom gas. |
222
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2364 // decoplan (char_O_deco_depth, char_O_deco_time). |
234
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2365 // CF#54 == TRUE if shallowest stop first. |
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2366 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min. |
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2367 // CF#57 == deco liters/minutes (5 .. 50) or bar/min. |
224 | 2368 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
222
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2369 // |
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2370 void deco_gas_volumes(void) |
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2371 { |
338 | 2372 overlay float volumes[NUM_GAS]; |
478
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2373 overlay float bottom_usage, deco_usage; |
234
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2374 overlay unsigned char i, deepest_first; |
646 | 2375 overlay unsigned char gas, depth; |
222
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2376 RESET_C_STACK |
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2377 |
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2378 //---- initialize with bottom consumption -------------------------------- |
338 | 2379 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
240
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2380 volumes[i] = 0.0; |
222
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2381 |
338 | 2382 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
241 | 2383 gas = char_I_first_gas - 1; |
2384 | |
478
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2385 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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2386 if( char_I_const_ppO2 == 0 && bottom_usage > 0.0 ) |
265 | 2387 volumes[gas] |
2388 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
2389 * char_I_bottom_time // in minutes. | |
2390 * bottom_usage; // In liter/minutes. | |
579
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2391 |
222
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2392 //---- Ascent usage ------------------------------------------------------ |
234
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2393 deepest_first = read_custom_function(54) == 0; |
511
2a6293641d51
NEW NDL NDL faster/more precise simu (but no closed formula for trimix).
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509
diff
changeset
|
2394 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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218
diff
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|
2395 |
646 | 2396 depth = char_I_bottom_depth; |
222
638f8e17bd51
Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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diff
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2397 |
338 | 2398 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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diff
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|
2399 { |
658
75dc320f4681
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|
2400 overlay unsigned char newDepth, time; |
234
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BUGFIX Gas Usage when stops are shallowest first: CF54 (bug BB24).
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diff
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|
2401 |
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BUGFIX Gas Usage when stops are shallowest first: CF54 (bug BB24).
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2402 // Manage stops in reverse order (CF#54) |
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BUGFIX Gas Usage when stops are shallowest first: CF54 (bug BB24).
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diff
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|
2403 if( deepest_first ) |
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2404 { |
241 | 2405 time = char_O_deco_time[i]; |
234
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2406 if( time == 0 ) break; // End of table: done. |
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2407 |
658
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|
2408 newDepth = char_O_deco_depth[i] & 0x7F; |
234
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2409 } |
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2410 else |
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BUGFIX Gas Usage when stops are shallowest first: CF54 (bug BB24).
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|
2411 { |
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|
2412 time = char_O_deco_time[31-i]; |
658
75dc320f4681
BUGFIX Gas volumes when many tanks and stops.
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parents:
646
diff
changeset
|
2413 if( time == 0 ) continue; // not yet: still search table. |
234
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2414 |
658
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|
2415 newDepth = char_O_deco_depth[31-i] & 0x7F; |
234
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|
2416 } |
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2417 |
658
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|
2418 //---- Gas switch during this step ----------------------------------- |
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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diff
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|
2419 { |
658
75dc320f4681
BUGFIX Gas volumes when many tanks and stops.
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|
2420 overlay unsigned char newGas = 0; |
75dc320f4681
BUGFIX Gas volumes when many tanks and stops.
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parents:
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diff
changeset
|
2421 overlay unsigned char newStop = 0; // NO CHANGE yet |
75dc320f4681
BUGFIX Gas volumes when many tanks and stops.
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parents:
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diff
changeset
|
2422 overlay unsigned char j; |
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BUGFIX Gas volumes when many tanks and stops.
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changeset
|
2423 |
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BUGFIX Gas volumes when many tanks and stops.
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|
2424 for(j=0; j<NUM_GAS; ++j) |
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BUGFIX Gas volumes when many tanks and stops.
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parents:
646
diff
changeset
|
2425 { |
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diff
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|
2426 // Skip gas without changing depth: |
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diff
changeset
|
2427 if( ! char_I_deco_gas_change[j] ) |
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BUGFIX Gas volumes when many tanks and stops.
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changeset
|
2428 continue; |
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|
2429 // Select gas changed between [newDepth .. depth] |
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diff
changeset
|
2430 if( newDepth <= char_I_deco_gas_change[j] |
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diff
changeset
|
2431 && char_I_deco_gas_change[j] <= depth ) |
646 | 2432 { |
658
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parents:
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diff
changeset
|
2433 // Keep the DEEPEST gas in that range: |
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diff
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|
2434 // Note: that = means changing gas at BEGINNING of this stop. |
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|
2435 if( char_I_deco_gas_change[j] >= newStop ) |
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diff
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|
2436 { |
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BUGFIX Gas volumes when many tanks and stops.
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diff
changeset
|
2437 newGas = j; |
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diff
changeset
|
2438 newStop = char_I_deco_gas_change[j]; |
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diff
changeset
|
2439 } |
646 | 2440 } |
658
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diff
changeset
|
2441 } |
222
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|
2442 |
658
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diff
changeset
|
2443 if( newStop ) // Did we find something ? |
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diff
changeset
|
2444 { |
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diff
changeset
|
2445 // usage BEFORE gas switch (if any), at 10m/min : |
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diff
changeset
|
2446 if( deco_usage > 0.0 && depth > newStop ) |
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diff
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|
2447 // Plus usage during ascent to the next stop, at 10m/min. |
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diff
changeset
|
2448 volumes[gas] += ((depth+newStop)*0.05 + 1.0) // average depth --> bar. |
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diff
changeset
|
2449 * (depth-newStop)*0.1 // metre --> min |
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parents:
646
diff
changeset
|
2450 * deco_usage; |
646 | 2451 |
658
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diff
changeset
|
2452 // Do gas switch: |
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diff
changeset
|
2453 gas = newGas; |
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diff
changeset
|
2454 depth = newStop; |
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diff
changeset
|
2455 } |
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diff
changeset
|
2456 } |
646 | 2457 |
2458 // usage AFTER gas switch (if any), at 10m/min : | |
2459 if( depth > newDepth ) | |
2460 volumes[gas] += ((depth+newDepth)*0.05 + 1.0) // average depth --> bar. | |
2461 * (depth-newDepth)*0.1 // metre --> min | |
2462 * deco_usage; | |
2463 | |
2464 // Do stop: | |
2465 depth = newDepth; | |
2466 | |
2467 // Usage at stop: | |
478
fd8266b511cc
New SAC (CF56/CF57) in 5..50 l/min range (no more decimal).
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471
diff
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|
2468 if( deco_usage > 0.0 ) |
265 | 2469 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
2470 * time // in minutes. | |
646 | 2471 * deco_usage; // in xxx / min @ 1bar. |
265 | 2472 else |
2473 volumes[gas] = 65535.0; | |
222
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|
2474 } |
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diff
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|
2475 |
646 | 2476 // From last stop to surface |
2477 if( deco_usage > 0.0 ) | |
2478 volumes[gas] += (depth*0.05 + 1.0) // avg depth --> bar. | |
2479 * depth * 0.1 // time to surface, in minutes. | |
2480 * deco_usage; // in xxx / min @ 1bar. | |
2481 | |
222
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diff
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|
2482 //---- convert results for the ASM interface ----------------------------- |
338 | 2483 for(i=0; i<NUM_GAS; ++i) |
441
4826dd98514b
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|
2484 if( volumes[i] > 65534.0 ) |
224 | 2485 int_O_gas_volumes[i] = 65535; |
222
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218
diff
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|
2486 else |
441
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|
2487 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); |
116 | 2488 } |
2489 | |
167 | 2490 ////////////////////////////////////////////////////////////////////////////// |
2491 | |
116 | 2492 void deco_push_tissues_to_vault(void) |
2493 { | |
167 | 2494 overlay unsigned char x; |
122
3003a8040b78
FIX again reset C data stack and frame pointer when entering C code.
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116
diff
changeset
|
2495 RESET_C_STACK |
167 | 2496 |
116 | 2497 cns_vault = CNS_fraction; |
697 | 2498 low_depth_vault = low_depth; |
2499 | |
339 | 2500 for (x=0;x<NUM_COMP;x++) |
2501 { | |
2502 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
2503 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
2504 } | |
116 | 2505 } |
167 | 2506 |
116 | 2507 void deco_pull_tissues_from_vault(void) |
2508 { | |
167 | 2509 overlay unsigned char x; |
122
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diff
changeset
|
2510 RESET_C_STACK |
167 | 2511 |
339 | 2512 for (x=0; x<NUM_COMP; x++) |
2513 { | |
2514 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
2515 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
2516 } | |
292 | 2517 |
2518 // Restore both CNS variable, too. | |
2519 CNS_fraction = cns_vault; | |
514 | 2520 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
697 | 2521 |
2522 // GF history too: | |
2523 low_depth = low_depth_vault; | |
2524 locked_GF_step = GF_delta / low_depth; | |
116 | 2525 } |
2526 | |
167 | 2527 ////////////////////////////////////////////////////////////////////////////// |
2528 // | |
184 | 2529 #ifndef CROSS_COMPILE |
2530 void main() {} | |
2531 #endif |