Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 645:b48f613398f9
minor
author | heinrichsweikamp |
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date | Wed, 03 Oct 2012 20:21:57 +0200 |
parents | 242139da29f2 |
children | 06ffc99a405f |
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. |
645 | 86 // 2012/09/10: [mH] Fill char_O_deco_time_for_log for logbook write |
116 | 87 // |
167 | 88 // TODO: |
89 // + Allow to abort MD2 calculation (have to restart next time). | |
90 // | |
91 // Literature: | |
200 | 92 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
116 | 93 // 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 |
94 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
95 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
96 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
97 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
167 | 98 // |
99 // | |
116 | 100 |
101 // ********************* | |
102 // ** I N C L U D E S ** | |
103 // ********************* | |
104 #include <math.h> | |
167 | 105 |
192 | 106 // *********************************************** |
107 // ** V A R I A B L E S D E F I N I T I O N S ** | |
108 // *********************************************** | |
109 | |
110 #include "p2_definitions.h" | |
275
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111 #define TEST_MAIN |
509 | 112 #include "../OSTC_code_asm_part1/shared_definitions.h" |
192 | 113 |
200 | 114 // Water vapour partial pressure in the lumb. |
527 | 115 #define ppWater 0.0627 |
317 | 116 #define METER_TO_BAR 0.09985 |
117 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
200 | 118 |
491
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119 // Surface security factor |
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120 #define SURFACE_DESAT_FACTOR 0.7042 |
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121 |
167 | 122 // ************************* |
123 // ** P R O T O T Y P E S ** | |
124 // ************************* | |
125 | |
126 static void calc_hauptroutine(void); | |
127 static void calc_nullzeit(void); | |
128 | |
192 | 129 static void calc_tissue(PARAMETER unsigned char period); |
258 | 130 static void calc_limit(void); |
192 | 131 |
167 | 132 static void clear_tissue(void); |
133 static void calc_ascenttime(void); | |
134 static void update_startvalues(void); | |
169
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135 static void clear_deco_table(void); |
471 | 136 static unsigned char update_deco_table(void); |
192 | 137 |
138 static void sim_tissue(PARAMETER unsigned char period); | |
139 static void sim_limit(PARAMETER float GF_current); | |
312
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140 static void sim_extra_time(void); |
368 | 141 static void calc_dive_interval(void); |
312
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142 |
167 | 143 static void calc_gradient_factor(void); |
144 static void calc_wo_deco_step_1_min(void); | |
145 | |
146 static void calc_hauptroutine_data_input(void); | |
147 static void calc_hauptroutine_update_tissues(void); | |
148 static void calc_hauptroutine_calc_deco(void); | |
169
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149 static void sim_ascent_to_first_stop(void); |
167 | 150 |
241 | 151 static unsigned char gas_switch_deepest(void); |
152 static void gas_switch_set(void); | |
217 | 153 |
241 | 154 static unsigned char calc_nextdecodepth(void); |
116 | 155 |
200 | 156 //---- Bank 4 parameters ----------------------------------------------------- |
601
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157 #ifndef UNIX |
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158 # pragma udata bank4=0x400 |
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159 #endif |
116 | 160 |
161 static float GF_low; | |
162 static float GF_high; | |
163 static float GF_delta; | |
192 | 164 static float locked_GF_step; // GF_delta / low_depth |
165 | |
166 static unsigned char temp_depth_limit; | |
562 | 167 static unsigned char low_depth; // Depth of deepest stop |
171 | 168 |
192 | 169 // Simulation context: used to predict ascent. |
170 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
171 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
116 | 172 |
192 | 173 // Real context: what we are doing now. |
174 static float calc_lead_tissue_limit; // | |
116 | 175 |
338 | 176 static unsigned char internal_deco_time[NUM_STOPS]; |
177 static unsigned char internal_deco_depth[NUM_STOPS]; | |
116 | 178 |
179 static float cns_vault; | |
339 | 180 static float pres_tissue_N2_vault[NUM_COMP]; |
181 static float pres_tissue_He_vault[NUM_COMP]; | |
116 | 182 |
163 | 183 //---- Bank 5 parameters ----------------------------------------------------- |
601
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184 #ifndef UNIX |
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185 # pragma udata bank5=0x500 |
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186 #endif |
163 | 187 |
167 | 188 static unsigned char ci; |
116 | 189 static float pres_respiration; |
190 static float pres_surface; | |
191 static float temp_deco; | |
236 | 192 static float ppN2; |
200 | 193 static float ppHe; |
116 | 194 static float temp_tissue; |
200 | 195 static float N2_ratio; // Breathed gas nitrogen ratio. |
196 static float He_ratio; // Breathed gas helium ratio. | |
197 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
198 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
199 static float var_He_a; // Bühlmann a, for current He tissue. | |
200 static float var_He_b; // Bühlmann b, for current He tissue. | |
201 static float var_N2_e; // Exposition, for current N2 tissue. | |
202 static float var_He_e; // Exposition, for current He tissue. | |
509 | 203 static float var_N2_ht; // Half-time for current N2 tissue. |
204 static float var_He_ht; // Half-time for current N2 tissue. | |
116 | 205 |
338 | 206 static float pres_diluent; // new in v.101 |
207 static float const_ppO2; // new in v.101 | |
116 | 208 |
241 | 209 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
210 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
203 | 211 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
212 static unsigned short sim_dive_mins; // Simulated dive time. | |
200 | 213 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
214 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
215 static float CNS_fraction; // new in v.101 | |
216 static float float_saturation_multiplier; // new in v.101 | |
217 static float float_desaturation_multiplier; // new in v.101 | |
338 | 218 static float float_deco_distance; // new in v.101 |
219 static char flag_in_divemode; // new in v.108 | |
167 | 220 |
338 | 221 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
167 | 222 |
163 | 223 //---- Bank 6 parameters ----------------------------------------------------- |
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224 #ifndef UNIX |
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225 # pragma udata bank6=0x600 |
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226 #endif |
116 | 227 |
339 | 228 float pres_tissue_N2[NUM_COMP]; |
229 float pres_tissue_He[NUM_COMP]; | |
509 | 230 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. |
231 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
116 | 232 |
163 | 233 //---- Bank 7 parameters ----------------------------------------------------- |
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234 #ifndef UNIX |
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235 # pragma udata bank7=0x700 |
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236 #endif |
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237 |
509 | 238 // EMPTY ... |
116 | 239 |
163 | 240 //---- Bank 8 parameters ----------------------------------------------------- |
601
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241 #ifndef UNIX |
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242 # pragma udata bank8=0x800 |
163 | 243 |
601
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244 static char md_pi_subst[256]; |
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245 # define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
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246 |
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247 #endif |
116 | 248 |
163 | 249 //---- Bank 9 parameters ----------------------------------------------------- |
601
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250 #ifndef UNIX |
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251 # pragma udata bank9=0x900 |
116 | 252 |
601
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253 static char md_state[48]; // DONT MOVE : has to be at the beginning of bank 9 for the asm code!!! |
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254 #endif |
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255 |
116 | 256 |
167 | 257 ////////////////////////////////////////////////////////////////////////////// |
258 ////////////////////////////////////////////////////////////////////////////// | |
259 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
260 ////////////////////////////////////////////////////////////////////////////// | |
261 ////////////////////////////////////////////////////////////////////////////// | |
262 // | |
263 // End of PROM code is 17F00, So push tables on PROM top... | |
264 // | |
601
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265 #ifndef UNIX |
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266 # pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. |
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267 #endif |
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268 |
167 | 269 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) |
116 | 270 |
167 | 271 // Magic table to compute the MD2 HASH |
272 // | |
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273 #ifndef UNIX |
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274 # pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... |
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275 rom const rom unsigned short md_pi[] = |
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276 { |
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277 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 |
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278 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA |
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279 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 |
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280 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A |
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281 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 |
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282 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 |
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283 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 |
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284 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 |
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285 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 |
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286 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F |
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287 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 |
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288 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 |
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289 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A |
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290 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 |
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291 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A |
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292 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 |
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293 }; |
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294 #endif |
116 | 295 |
167 | 296 ////////////////////////////////////////////////////////////////////////////// |
297 ////////////////////////////////////////////////////////////////////////////// | |
298 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
299 ////////////////////////////////////////////////////////////////////////////// | |
300 ////////////////////////////////////////////////////////////////////////////// | |
301 // | |
116 | 302 // all new in v.102 |
303 // moved from 0x0D000 to 0x0C000 in v.108 | |
601
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304 #ifndef UNIX |
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305 # pragma code p2_deco = 0x0C000 |
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306 #endif |
116 | 307 |
167 | 308 ////////////////////////////////////////////////////////////////////////////// |
309 ////////////////////////////////////////////////////////////////////////////// | |
310 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
311 ////////////////////////////////////////////////////////////////////////////// | |
312 ////////////////////////////////////////////////////////////////////////////// | |
313 | |
235 | 314 ////////////////////////////////////////////////////////////////////////////// |
257
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315 // Bump to blue-screen when an assert is wrong |
235 | 316 #ifdef __DEBUG |
317 void assert_failed(PARAMETER short int line) | |
318 { | |
319 extern void PLED_resetdebugger(void); | |
320 extern unsigned short temp10; | |
321 | |
257
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322 temp10 = line; // Show source line number as stack depth. |
235 | 323 PLED_resetdebugger(); |
324 } | |
325 #endif | |
257
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326 |
235 | 327 ////////////////////////////////////////////////////////////////////////////// |
328 // When calling C code from ASM context, the data stack pointer and | |
329 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
330 | |
331 #ifdef CROSS_COMPILE | |
332 # define RESET_C_STACK | |
333 #else | |
334 # ifdef __DEBUG | |
335 # define RESET_C_STACK fillDataStack(); | |
336 void fillDataStack(void) | |
337 { | |
338 _asm | |
339 LFSR 1,C_STACK | |
340 MOVLW 0xCC | |
341 loop: MOVWF POSTINC1,0 | |
342 TSTFSZ FSR1L,0 | |
343 BRA loop | |
344 | |
345 LFSR 1,C_STACK | |
346 LFSR 2,C_STACK | |
347 _endasm | |
348 } | |
349 # else | |
350 # define RESET_C_STACK \ | |
351 _asm \ | |
352 LFSR 1, C_STACK \ | |
353 LFSR 2, C_STACK \ | |
354 _endasm | |
355 # endif | |
356 #endif | |
357 | |
358 ////////////////////////////////////////////////////////////////////////////// | |
257
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359 // Read CF values from the C code. |
235 | 360 |
488 | 361 #ifdef CROSS_COMPILE |
362 // Full description of the OSTC EEPROM map, including CF values. | |
363 # include "OSTC_eeprom.h" | |
364 #endif | |
365 | |
203 | 366 static short read_custom_function(PARAMETER unsigned char cf) |
167 | 367 { |
184 | 368 #ifdef CROSS_COMPILE |
564 | 369 return (cf & 32) ? eeprom.bank1_CF[cf-32].value.lo |
370 : eeprom.bank0_CF[cf ].value.lo; | |
184 | 371 #else |
167 | 372 extern unsigned char hi, lo; |
373 extern void getcustom15(); | |
374 _asm | |
375 movff cf,WREG | |
376 call getcustom15,0 | |
377 movff lo,PRODL | |
378 movff hi,PRODH | |
379 _endasm | |
184 | 380 #endif |
167 | 381 } |
382 | |
383 ////////////////////////////////////////////////////////////////////////////// | |
257
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384 // Fast subroutine to read RTC timer 3. |
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385 // Note: result is in 1/32 of msecs. |
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386 static unsigned short tmr3(void) |
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387 { |
261 | 388 #ifndef CROSS_COMPILE |
257
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389 _asm |
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390 movff 0xfb2,PRODL // TMR3L |
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391 movff 0xfb3,PRODH // TMR3H |
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392 _endasm // result in PRODH:PRODL. |
261 | 393 #else |
394 return 0; | |
395 #endif | |
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396 } |
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397 |
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398 ////////////////////////////////////////////////////////////////////////////// |
258 | 399 // read buhlmann tables A and B for compatriment ci |
400 // | |
401 static void read_buhlmann_coefficients(void) | |
165 | 402 { |
184 | 403 #ifndef CROSS_COMPILE |
167 | 404 // Note: we don't use far rom pointer, because the |
338 | 405 // 24 bits is too complex, hence we have to set |
167 | 406 // the UPPER page ourself... |
407 // --> Set zero if tables are moved to lower pages ! | |
408 _asm | |
409 movlw 1 | |
410 movwf TBLPTRU,0 | |
411 _endasm | |
184 | 412 #endif |
258 | 413 |
564 | 414 assert( ci < NUM_COMP ); |
338 | 415 |
416 // Use an interleaved array (AoS) to access coefficients with a | |
417 // single addressing. | |
418 { | |
419 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
420 var_N2_a = *ptr++; | |
421 var_N2_b = *ptr++; | |
422 var_He_a = *ptr++; | |
423 var_He_b = *ptr++; | |
424 } | |
258 | 425 } |
426 | |
427 ////////////////////////////////////////////////////////////////////////////// | |
428 // read buhlmann tables for compatriment ci | |
429 // If period == 0 : 2sec interval | |
430 // 1 : 1 min interval | |
431 // 2 : 10 min interval. | |
432 static void read_buhlmann_times(PARAMETER char period) | |
433 { | |
434 #ifndef CROSS_COMPILE | |
435 // Note: we don't use far rom pointer, because the | |
436 // 24 bits is to complex, hence we have to set | |
437 // the UPPER page ourself... | |
438 // --> Set zero if tables are moved to lower pages ! | |
439 _asm | |
440 movlw 1 | |
441 movwf TBLPTRU,0 | |
442 _endasm | |
443 #endif | |
338 | 444 |
564 | 445 assert( ci < NUM_COMP ); |
258 | 446 |
165 | 447 // Integration intervals. |
167 | 448 switch(period) |
165 | 449 { |
450 case 0: //---- 2 sec ----------------------------------------------------- | |
338 | 451 { |
452 overlay rom const float* ptr = &e2secs[2*ci]; | |
453 var_N2_e = *ptr++; | |
454 var_He_e = *ptr++; | |
455 } | |
165 | 456 break; |
457 | |
458 case 1: //---- 1 min ----------------------------------------------------- | |
338 | 459 { |
460 overlay rom const float* ptr = &e1min[2*ci]; | |
461 var_N2_e = *ptr++; | |
462 var_He_e = *ptr++; | |
463 } | |
165 | 464 break; |
465 | |
466 case 2: //---- 10 min ---------------------------------------------------- | |
338 | 467 { |
468 overlay rom const float* ptr = &e10min[2*ci]; | |
469 var_N2_e = *ptr++; | |
470 var_He_e = *ptr++; | |
471 } | |
165 | 472 break; |
197 | 473 |
474 default: | |
527 | 475 assert(0); // Never go there... |
165 | 476 } |
477 } | |
478 | |
479 ////////////////////////////////////////////////////////////////////////////// | |
509 | 480 // read buhlmann tables for compatriment ci |
481 // | |
482 static void read_buhlmann_ht(void) | |
483 { | |
484 | |
485 #ifndef CROSS_COMPILE | |
486 // Note: we don't use far rom pointer, because the | |
487 // 24 bits is to complex, hence we have to set | |
488 // the UPPER page ourself... | |
489 // --> Set zero if tables are moved to lower pages ! | |
490 _asm | |
491 movlw 1 | |
492 movwf TBLPTRU,0 | |
493 _endasm | |
494 #endif | |
495 | |
564 | 496 assert( ci < NUM_COMP ); |
509 | 497 { |
498 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
499 var_N2_ht = *ptr++; | |
500 var_He_ht = *ptr++; | |
501 } | |
502 | |
503 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
504 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
505 } | |
506 | |
507 ////////////////////////////////////////////////////////////////////////////// | |
340
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508 // calc_nextdecodepth |
165 | 509 // |
116 | 510 // new in v.102 |
165 | 511 // |
116 | 512 // INPUT, changing during dive: |
509 | 513 // temp_deco |
192 | 514 // low_depth |
167 | 515 // |
116 | 516 // INPUT, fixed during dive: |
167 | 517 // pres_surface |
518 // GF_delta | |
519 // GF_high | |
520 // GF_low | |
171 | 521 // char_I_depth_last_deco |
167 | 522 // float_deco_distance |
523 // | |
241 | 524 // RETURN TRUE iff a stop is needed. |
525 // | |
116 | 526 // OUTPUT |
171 | 527 // locked_GF_step |
167 | 528 // temp_depth_limt |
192 | 529 // low_depth |
167 | 530 // |
241 | 531 static unsigned char calc_nextdecodepth(void) |
167 | 532 { |
241 | 533 //--- Max ascent speed --------------------------------------------------- |
534 // Recompute leading gas limit, at current depth: | |
317 | 535 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
241 | 536 |
537 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
302 | 538 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
241 | 539 |
540 // Do we need to stop at current depth ? | |
541 overlay unsigned char need_stop = 0; | |
542 | |
543 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
544 | |
212 | 545 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
509 | 546 if( char_I_deco_model != 0 ) |
116 | 547 { |
562 | 548 overlay unsigned char first_stop = 0; |
549 overlay float p; | |
550 | |
567 | 551 sim_limit( GF_low ); |
562 | 552 p = sim_lead_tissue_limit - pres_surface; |
553 if( p <= 0.0f ) | |
554 goto no_deco_stop; // We can surface directly... | |
512
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555 |
562 | 556 p *= BAR_TO_METER; |
557 if( p < min_depth ) | |
558 goto no_deco_stop; // First stop is higher than 1' ascent. | |
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559 |
562 | 560 first_stop = 3 * (short)(0.99999 + p*0.333333); |
561 assert( first_stop < 128 ); | |
562 | |
563 // Apply correction for the shallowest stop. | |
564 if( first_stop == 3 ) // new in v104 | |
565 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
171 | 566 |
562 | 567 // Store the deepest point needing a deco stop as the LOW reference for GF. |
568 // NOTE: following stops will be validated using this LOW-HIGH gf scale, | |
569 // so if we want to keep coherency, we should not validate this stop | |
568 | 570 // yet, but apply the search to it, as for all the following stops afterward. |
562 | 571 if( first_stop > low_depth ) |
572 { | |
573 low_depth = first_stop; | |
568 | 574 locked_GF_step = GF_delta / first_stop; |
562 | 575 } |
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576 |
562 | 577 // We have a stop candidate. |
578 // But maybe ascending to the next stop will diminish the constraint, | |
579 // because the GF might decrease more than the preassure gradient... | |
580 while(first_stop > 0) | |
581 { | |
582 overlay unsigned char next_stop; // Next depth (0..90m) | |
583 overlay float pres_stop; // Next pressure (bar) | |
171 | 584 |
562 | 585 // Check max speed, or reaching surface. |
586 if( first_stop <= min_depth ) | |
587 goto no_deco_stop; | |
171 | 588 |
562 | 589 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
590 next_stop = 0; | |
591 else if( first_stop == 6 ) | |
592 next_stop = char_I_depth_last_deco; | |
593 else | |
594 next_stop = first_stop - 3; // Index of next (upper) stop. | |
595 | |
596 // Just a check we are indeed above LOW ref. | |
597 assert( next_stop < low_depth ); | |
241 | 598 |
562 | 599 // Total preassure at the new stop candidate: |
600 pres_stop = next_stop * METER_TO_BAR | |
601 + pres_surface; | |
167 | 602 |
562 | 603 // Keep GF_low until a first stop depth is found: |
604 sim_limit( GF_high - next_stop * locked_GF_step ); | |
192 | 605 |
562 | 606 // Check upper limit (lowest pressure tolerated): |
607 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
608 goto deco_stop_found; | |
609 | |
610 // Else, validate that stop and loop... | |
611 first_stop = next_stop; | |
612 } | |
613 assert( first_stop == 0 ); | |
171 | 614 |
562 | 615 no_deco_stop: |
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616 temp_depth_limit = min_depth; |
562 | 617 goto done; |
212 | 618 |
562 | 619 // next stop is the last validated depth found, aka first_stop |
620 deco_stop_found: | |
621 need_stop = 1; // Hit. | |
622 temp_depth_limit = first_stop; // Stop depth, in meter. | |
623 | |
624 done: | |
625 ; | |
116 | 626 } |
167 | 627 else //---- ZH-L16 model ------------------------------------------------- |
116 | 628 { |
192 | 629 overlay float pres_gradient; |
630 | |
631 // Original model | |
116 | 632 // optimized in v.101 |
171 | 633 // char_I_depth_last_deco included in v.101 |
116 | 634 |
192 | 635 // Compute sim_lead_tissue_limit too, but just once. |
636 sim_limit(1.0); | |
637 | |
638 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
167 | 639 if (pres_gradient >= 0) |
116 | 640 { |
317 | 641 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
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642 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
241 | 643 need_stop = 1; // Hit. |
644 | |
645 // Implement last stop at 4m/5m/6m... | |
646 if( temp_depth_limit == 3 ) | |
647 temp_depth_limit = char_I_depth_last_deco; | |
171 | 648 } |
116 | 649 else |
241 | 650 temp_depth_limit = 0; |
171 | 651 } |
212 | 652 |
217 | 653 //---- Check gas change -------------------------------------------------- |
241 | 654 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
655 | |
656 return need_stop; | |
167 | 657 } |
116 | 658 |
167 | 659 ////////////////////////////////////////////////////////////////////////////// |
169
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660 // copy_deco_table |
167 | 661 // |
169
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662 // Buffer the stops, once computed, so we can continue to display them |
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663 // while computing the next set. |
167 | 664 // |
169
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665 static void copy_deco_table(void) |
116 | 666 { |
169
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667 // Copy depth of the first (deepest) stop, because when reversing |
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668 // order, it will be hard to find... |
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669 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
169
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670 char_O_first_deco_time = internal_deco_time [0]; |
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671 |
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672 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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673 { |
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674 overlay unsigned char x, y; |
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675 |
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676 //---- First: search the first non-null depth |
339 | 677 for(x=(NUM_STOPS-1); x != 0; --x) |
169
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678 if( internal_deco_depth[x] != 0 ) break; |
116 | 679 |
169
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680 //---- Second: copy to output table (in reverse order) |
338 | 681 for(y=0; y<NUM_STOPS; y++, --x) |
169
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682 { |
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683 char_O_deco_depth[y] = internal_deco_depth[x]; |
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684 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
169
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685 char_O_deco_time [y] = internal_deco_time [x]; |
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686 |
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687 // Stop only once the last transfer is done. |
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688 if( x == 0 ) break; |
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689 } |
116 | 690 |
169
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691 //---- Third: fill table end with null |
339 | 692 for(y++; y<NUM_STOPS; y++) |
169
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693 { |
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694 char_O_deco_time [y] = 0; |
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695 char_O_deco_depth[y] = 0; |
630
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696 char_O_deco_time_for_log[y] = 0; |
169
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697 } |
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698 } |
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699 else //---- Straight copy ------------------------------------------------ |
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700 { |
630
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701 overlay unsigned char x, y; |
167 | 702 |
339 | 703 for(x=0; x<NUM_STOPS; x++) |
169
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704 { |
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705 char_O_deco_depth[x] = internal_deco_depth[x]; |
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706 char_O_deco_time [x] = internal_deco_time [x]; |
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707 } |
630
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708 |
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709 //Now fill the char_O_deco_time_for_log array |
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710 //---- First: search the first non-null depth |
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711 for(x=(NUM_STOPS-1); x != 0; --x) |
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712 if( internal_deco_depth[x] != 0 ) break; |
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713 |
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714 //---- Second: copy to output table (in reverse order) |
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715 for(y=0; y<NUM_STOPS; y++, --x) |
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716 { |
633
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717 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
630
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718 |
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719 // Stop only once the last transfer is done. |
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720 if( x == 0 ) break; |
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721 } |
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722 |
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723 //---- Third: fill table end with null |
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724 for(y++; y<NUM_STOPS; y++) |
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725 { |
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726 char_O_deco_time_for_log [y] = 0; |
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727 } |
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728 |
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729 } |
167 | 730 } |
116 | 731 |
167 | 732 ////////////////////////////////////////////////////////////////////////////// |
116 | 733 // temp_tissue_safety // |
167 | 734 // |
116 | 735 // outsourced in v.102 |
167 | 736 // |
737 // Apply safety factors for brand ZH-L16 model. | |
738 // | |
739 static void temp_tissue_safety(void) | |
116 | 740 { |
197 | 741 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
742 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
743 | |
167 | 744 if( char_I_deco_model == 0 ) |
116 | 745 { |
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746 if( temp_tissue < 0.0 ) |
126 | 747 temp_tissue *= float_desaturation_multiplier; |
116 | 748 else |
126 | 749 temp_tissue *= float_saturation_multiplier; |
116 | 750 } |
167 | 751 } |
116 | 752 |
167 | 753 ////////////////////////////////////////////////////////////////////////////// |
754 ////////////////////////////////////////////////////////////////////////////// | |
116 | 755 // ** THE JUMP-IN CODE ** |
756 // ** for the asm code ** | |
167 | 757 ////////////////////////////////////////////////////////////////////////////// |
758 ////////////////////////////////////////////////////////////////////////////// | |
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759 |
167 | 760 ////////////////////////////////////////////////////////////////////////////// |
169
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761 // Called every 2 seconds during diving. |
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762 // update tissues every time. |
184 | 763 // |
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764 // Every 6 seconds (or slower when TTS > 16): |
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765 // - update deco table (char_O_deco_time/depth) with new values. |
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766 // - update ascent time, |
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767 // - set status to zero (so we can check there is new results). |
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768 // |
116 | 769 void deco_calc_hauptroutine(void) |
770 { | |
122
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771 RESET_C_STACK |
116 | 772 calc_hauptroutine(); |
773 int_O_desaturation_time = 65535; | |
774 } | |
775 | |
167 | 776 ////////////////////////////////////////////////////////////////////////////// |
184 | 777 // Reset decompression model: |
778 // + Set all tissues to equilibrium with Air at ambient pressure. | |
779 // + Reset last stop to 0m | |
780 // + Reset all model output. | |
116 | 781 void deco_clear_tissue(void) |
782 { | |
122
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783 RESET_C_STACK |
116 | 784 clear_tissue(); |
785 } | |
786 | |
167 | 787 ////////////////////////////////////////////////////////////////////////////// |
278 | 788 // Called every 1 min during decoplanning. |
789 // Update tissues for 1 min. | |
790 // | |
791 void deco_calc_tissue(void) | |
792 { | |
793 RESET_C_STACK | |
794 calc_hauptroutine_update_tissues(); | |
795 } | |
796 | |
797 ////////////////////////////////////////////////////////////////////////////// | |
167 | 798 |
116 | 799 void deco_calc_wo_deco_step_1_min(void) |
800 { | |
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801 RESET_C_STACK |
116 | 802 calc_wo_deco_step_1_min(); |
803 deco_calc_desaturation_time(); | |
804 } | |
805 | |
167 | 806 ////////////////////////////////////////////////////////////////////////////// |
807 | |
368 | 808 void deco_calc_dive_interval(void) |
809 { | |
810 RESET_C_STACK | |
811 calc_dive_interval(); | |
812 } | |
813 | |
241 | 814 ////////////////////////////////////////////////////////////////////////////// |
815 // Find current gas in the list (if any). | |
816 // | |
513 | 817 // Input: char_I_current_gas = 1..6 |
241 | 818 // |
513 | 819 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. |
241 | 820 // |
821 static void gas_switch_find_current(void) | |
822 { | |
513 | 823 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
247
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824 |
388 | 825 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 |
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826 { |
388 | 827 sim_gas_last_used = char_I_current_gas; |
828 | |
829 // Note: if current is first gas, we must find it, but not set | |
830 // last depth change to surface. | |
831 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
832 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
241 | 833 } |
388 | 834 else |
835 sim_gas_last_used = 0; // Gas 6 = manual set | |
241 | 836 } |
837 | |
167 | 838 ////////////////////////////////////////////////////////////////////////////// |
217 | 839 // Find deepest available gas. |
201 | 840 // |
241 | 841 // Input: temp_depth_limit, |
842 // deco_gas_change[] | |
843 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
212 | 844 // |
241 | 845 // RETURNS TRUE if a stop is needed for gas switch. |
846 // | |
847 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
212 | 848 // |
241 | 849 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
850 // are null), or during the ascent to make sure we are not passing a | |
851 // stop (in which case both can be already set). | |
852 // | |
853 static unsigned char gas_switch_deepest(void) | |
201 | 854 { |
241 | 855 overlay unsigned char switch_deco = 0, switch_last = 0; |
201 | 856 |
857 if (char_I_const_ppO2 == 0) | |
858 { | |
225 | 859 overlay unsigned char j; |
860 | |
241 | 861 // Loop over all enabled gas, to find the deepest one, |
340
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862 // above last used gas, but below temp_depth_limit. |
338 | 863 for(j=0; j<NUM_GAS; ++j) |
225 | 864 { |
241 | 865 // Gas not (yet) allowed ? Skip ! |
866 if( temp_depth_limit > deco_gas_change[j] ) | |
867 continue; | |
868 | |
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869 // Gas deeper (or equal) than the current one ? Skip ! |
241 | 870 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
871 continue; | |
872 | |
873 // First, or deeper ? | |
247
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874 if( switch_deco < deco_gas_change[j] ) |
241 | 875 { |
876 switch_deco = deco_gas_change[j]; | |
388 | 877 switch_last = j+1; // 1..5 |
241 | 878 } |
225 | 879 } |
201 | 880 } |
881 | |
203 | 882 // If there is a better gas available |
241 | 883 if( switch_deco ) |
201 | 884 { |
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885 unsigned char delay = read_custom_function(55); |
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886 |
241 | 887 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
201 | 888 |
241 | 889 // Should restart gas-switch delay only when gas do changes... |
890 assert( sim_gas_delay <= sim_dive_mins ); | |
217 | 891 |
241 | 892 sim_gas_last_depth = switch_deco; |
893 sim_gas_last_used = switch_last; | |
555
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894 sim_gas_delay = delay |
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895 + sim_dive_mins; |
217 | 896 |
555
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897 if( delay ) |
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898 { |
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899 temp_depth_limit = switch_deco; |
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900 return 1; |
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901 } |
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902 else |
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903 return 0; |
217 | 904 } |
905 | |
241 | 906 sim_gas_delay = 0; |
907 return 0; | |
217 | 908 } |
909 | |
910 ////////////////////////////////////////////////////////////////////////////// | |
911 // Calculate gas switches | |
912 // | |
913 // | |
914 // Input: N2_ratio, He_ratio. | |
915 // sim_gas_last_used | |
916 // | |
917 // Output: calc_N2_ratio, calc_He_ratio | |
918 // | |
241 | 919 static void gas_switch_set(void) |
217 | 920 { |
564 | 921 assert( sim_gas_last_used <= NUM_GAS ); |
217 | 922 |
388 | 923 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. |
224 | 924 { |
925 calc_N2_ratio = N2_ratio; | |
926 calc_He_ratio = He_ratio; | |
927 } | |
928 else | |
929 { | |
930 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
931 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
217 | 932 } |
201 | 933 |
934 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
935 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
936 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
937 } | |
938 | |
939 ////////////////////////////////////////////////////////////////////////////// | |
940 // | |
212 | 941 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
509 | 942 // temp_deco : simulated respiration pressure |
276 | 943 // float_deco_distance : security factor. |
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944 // Water-vapor pressure inside limbs (ppWater). |
212 | 945 // |
236 | 946 // Output: ppN2, ppHe. |
212 | 947 // |
948 static void sim_alveolar_presures(void) | |
201 | 949 { |
212 | 950 overlay float deco_diluent = temp_deco; // new in v.101 |
951 | |
276 | 952 // Take deco offset into account, but not at surface. |
953 // Note: this should be done on ambiant pressure, hence before | |
954 // computing the diluant partial pressure... | |
955 if( deco_diluent > pres_surface ) | |
956 deco_diluent += float_deco_distance; | |
957 | |
212 | 958 //---- CCR mode : deco gas switch ? -------------------------------------- |
276 | 959 if( char_I_const_ppO2 != 0 ) |
201 | 960 { |
276 | 961 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
962 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
310
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963 // ppWater in the equations below: |
321 | 964 deco_diluent -= const_ppO2; |
276 | 965 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
212 | 966 |
967 if (deco_diluent > temp_deco) | |
968 deco_diluent = temp_deco; | |
201 | 969 } |
970 | |
310
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971 if( deco_diluent > ppWater ) |
201 | 972 { |
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973 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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974 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
201 | 975 } |
976 else | |
977 { | |
236 | 978 ppN2 = 0.0; |
201 | 979 ppHe = 0.0; |
980 } | |
236 | 981 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
201 | 982 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
983 } | |
984 | |
985 ////////////////////////////////////////////////////////////////////////////// | |
167 | 986 // clear_tissue |
987 // | |
165 | 988 // optimized in v.101 (var_N2_a) |
167 | 989 // |
990 // preload tissues with standard pressure for the given ambient pressure. | |
991 // Note: fixed N2_ratio for standard air. | |
201 | 992 // |
167 | 993 static void clear_tissue(void) |
116 | 994 { |
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995 overlay float p; |
116 | 996 flag_in_divemode = 0; |
997 | |
167 | 998 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
999 N2_ratio = 0.7902; | |
212 | 1000 pres_respiration = int_I_pres_respiration * 0.001; |
164 | 1001 |
511
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1002 p = N2_ratio * (pres_respiration - ppWater); |
338 | 1003 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1004 { |
511
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1005 // cycle through the 16 Bühlmann N2 tissues |
339 | 1006 pres_tissue_N2[ci] = p; |
197 | 1007 |
1008 // cycle through the 16 Bühlmann tissues for Helium | |
339 | 1009 pres_tissue_He[ci] = 0.0; |
511
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1010 } |
116 | 1011 |
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1012 clear_deco_table(); |
126 | 1013 char_O_deco_status = 0; |
1014 char_O_nullzeit = 0; | |
168 | 1015 int_O_ascenttime = 0; |
126 | 1016 char_O_gradient_factor = 0; |
1017 char_O_relative_gradient_GF = 0; | |
258 | 1018 |
1019 calc_lead_tissue_limit = 0.0; | |
1020 char_O_gtissue_no = 0; | |
167 | 1021 } |
116 | 1022 |
167 | 1023 ////////////////////////////////////////////////////////////////////////////// |
1024 // calc_hauptroutine | |
1025 // | |
1026 // this is the major code in dive mode calculates: | |
116 | 1027 // the tissues, |
167 | 1028 // the bottom time, |
1029 // and simulates the ascend with all deco stops. | |
171 | 1030 // |
1031 // The deco_state sequence is : | |
1032 // 3 (at surface) | |
1033 // +---> 0 : calc nullzeit | |
1034 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
1035 // | +-> 1 : simulate up to 16min of stops. | |
1036 // | +------< not finished | |
1037 // +--------< finish | |
1038 // | |
312
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1039 // Added steps 6,5 for @+5 calculation: |
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1040 // 6 = ascent to first stop (same as 2), except continue to 7 |
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1041 // 7 = same as 1, except loop to 7. |
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1042 // |
167 | 1043 static void calc_hauptroutine(void) |
116 | 1044 { |
241 | 1045 static unsigned char backup_gas_used = 0; |
1046 static unsigned char backup_gas_depth = 0; | |
217 | 1047 static unsigned char backup_gas_delay = 0; |
186 | 1048 |
116 | 1049 calc_hauptroutine_data_input(); |
1050 | |
1051 calc_hauptroutine_update_tissues(); | |
1052 calc_gradient_factor(); | |
1053 | |
167 | 1054 // toggle between calculation for nullzeit (bottom time), |
1055 // deco stops | |
1056 // and more deco stops (continue) | |
1057 switch( char_O_deco_status ) | |
116 | 1058 { |
186 | 1059 case 3: //---- At surface: start a new dive ------------------------------ |
1060 clear_deco_table(); | |
1061 copy_deco_table(); | |
200 | 1062 int_O_ascenttime = 0; // Reset DTR. |
323 | 1063 int_O_extra_ascenttime = 0; |
200 | 1064 char_O_nullzeit = 0; // Reset bottom time. |
278 | 1065 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
201 | 1066 |
217 | 1067 // Values that should be reset just once for the full real dive. |
1068 // This is used to record the lowest stop for the whole dive, | |
1069 // Including ACCROSS all simulated ascent. | |
567 | 1070 low_depth = 0; |
1071 locked_GF_step = 0.0; | |
217 | 1072 |
1073 // Reset gas switch history. | |
241 | 1074 backup_gas_used = sim_gas_last_used = 0; |
1075 backup_gas_depth = sim_gas_last_depth = 0; | |
217 | 1076 backup_gas_delay = sim_gas_delay = 0; |
203 | 1077 sim_dive_mins = 0; |
1078 break; | |
186 | 1079 |
167 | 1080 case 0: //---- bottom time ----------------------------------------------- |
312
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1081 default: |
509 | 1082 gas_switch_find_current(); // Lookup for current gas & time. |
1083 gas_switch_set(); // setup calc_ratio's | |
1084 | |
167 | 1085 calc_nullzeit(); |
534
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1086 if( char_O_nullzeit > 0 ) // Some NDL time left ? |
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1087 { |
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1088 char_O_deco_status = 0; // YES: recalc ndl next time. |
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1089 clear_deco_table(); // Also clear stops ! |
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1090 copy_deco_table(); |
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1091 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) |
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1092 } |
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1093 else |
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1094 char_O_deco_status = 2; // NO: calc ascent next time. |
186 | 1095 break; |
1096 | |
1097 case 2: //---- Simulate ascent to first stop ----------------------------- | |
312
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1098 case 6: // @+5min variation |
203 | 1099 // Check proposed gas at begin of ascent simulation |
247
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1100 sim_dive_mins = int_I_divemins; // Init current time. |
241 | 1101 |
532 | 1102 gas_switch_find_current(); // Lookup for current gas & time. |
1103 gas_switch_set(); // setup calc_ratio's | |
1104 | |
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1105 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1106 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
203 | 1107 backup_gas_delay = sim_gas_delay; |
186 | 1108 |
1109 sim_ascent_to_first_stop(); | |
201 | 1110 |
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1111 // Calc stops next time (deco or gas switch). |
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1112 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
167 | 1113 break; |
169
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1114 |
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1115 case 1: //---- Simulate stops -------------------------------------------- |
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1116 case 5: // @+5 variation. |
167 | 1117 calc_hauptroutine_calc_deco(); |
186 | 1118 |
1119 // If simulation is finished, restore the GF low reference, so that | |
1120 // next ascent simulation is done from the current depth: | |
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1121 if( (char_O_deco_status & 3) == 0 ) |
186 | 1122 { |
241 | 1123 sim_gas_last_used = backup_gas_used; |
1124 sim_gas_last_depth = backup_gas_depth; | |
247
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1125 sim_gas_delay = backup_gas_delay; |
186 | 1126 } |
167 | 1127 break; |
116 | 1128 } |
167 | 1129 |
116 | 1130 } |
1131 | |
167 | 1132 ////////////////////////////////////////////////////////////////////////////// |
1133 // calc_hauptroutine_data_input | |
1134 // | |
1135 // Reset all C-code dive parameters from their ASM-code values. | |
1136 // Detect gas change condition. | |
1137 // | |
116 | 1138 void calc_hauptroutine_data_input(void) |
1139 { | |
203 | 1140 overlay short int_temp; |
511
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1141 overlay unsigned char g; |
126 | 1142 |
197 | 1143 pres_respiration = int_I_pres_respiration * 0.001; |
1144 pres_surface = int_I_pres_surface * 0.001; | |
1145 N2_ratio = char_I_N2_ratio * 0.01; | |
1146 He_ratio = char_I_He_ratio * 0.01; | |
1147 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
116 | 1148 |
126 | 1149 // ____________________________________________________ |
1150 // | |
1151 // _____________ G A S _ C H A N G E S ________________ | |
1152 // ____________________________________________________ | |
1153 | |
212 | 1154 // Keep a margin of 150mbar = 1.50m |
1155 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
1156 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
126 | 1157 |
203 | 1158 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
511
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1159 for(g=0; g < NUM_GAS; ++g) |
126 | 1160 { |
511
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1161 deco_gas_change[g] = 0; |
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1162 if(char_I_deco_gas_change[g]) |
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1163 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) |
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1164 deco_gas_change[g] = char_I_deco_gas_change[g]; |
126 | 1165 } |
116 | 1166 |
197 | 1167 const_ppO2 = char_I_const_ppO2 * 0.01; |
1168 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
1169 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
1170 GF_low = char_I_GF_Low_percentage * 0.01; | |
1171 GF_high = char_I_GF_High_percentage * 0.01; | |
126 | 1172 GF_delta = GF_high - GF_low; |
116 | 1173 } |
1174 | |
167 | 1175 ////////////////////////////////////////////////////////////////////////////// |
171 | 1176 // |
1177 // | |
116 | 1178 void calc_hauptroutine_update_tissues(void) |
1179 { | |
197 | 1180 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
1181 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
1182 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
237 | 1183 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
197 | 1184 |
276 | 1185 pres_diluent = pres_respiration; |
307 | 1186 if( char_I_const_ppO2 != 0 ) // new in v.101 |
186 | 1187 { |
322 | 1188 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
1189 | |
276 | 1190 pres_diluent -= const_ppO2; // new in v.101 |
1191 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
321 | 1192 if( pres_diluent < 0.0 ) |
1193 pres_diluent = 0.0; | |
276 | 1194 if( pres_diluent > pres_respiration ) // new in v.101 |
1195 pres_diluent = pres_respiration; // new in v.101 | |
307 | 1196 |
321 | 1197 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
322 | 1198 |
326 | 1199 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
322 | 1200 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
1201 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
186 | 1202 } |
307 | 1203 |
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1204 if( pres_diluent > ppWater ) // new in v.101 |
116 | 1205 { |
307 | 1206 overlay float EAD, END; |
1207 | |
310
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1208 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1209 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
307 | 1210 |
1211 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
1212 // with plain air. | |
310
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1213 // ppN2 = 79% * (P_EAD - ppWater) |
307 | 1214 // EAD = (P_EAD - Psurface) * 10 |
310
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1215 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
317 | 1216 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
307 | 1217 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
317 | 1218 char_O_EAD = (unsigned char)(EAD + 0.5); |
307 | 1219 |
1220 // END : Equivalent Narcotic Dive. | |
1221 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
1222 // 0.23 btw). Hence the formula becomes: | |
310
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1223 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
317 | 1224 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
307 | 1225 // |
1226 // Source cited: | |
1227 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
1228 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
317 | 1229 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
307 | 1230 if( END < 0.0 || END > 245.5 ) END = 0.0; |
317 | 1231 char_O_END = (unsigned char)(END + 0.5); |
116 | 1232 } |
167 | 1233 else // new in v.101 |
116 | 1234 { |
236 | 1235 ppN2 = 0.0; // new in v.101 |
200 | 1236 ppHe = 0.0; // new in v.101 |
307 | 1237 char_O_EAD = char_O_END = 0; |
116 | 1238 } |
1239 | |
1240 if(!char_I_step_is_1min) | |
192 | 1241 calc_tissue(0); |
116 | 1242 else |
192 | 1243 calc_tissue(1); |
186 | 1244 |
192 | 1245 // Calc limit for surface, ie. GF_high. |
258 | 1246 calc_limit(); |
186 | 1247 |
203 | 1248 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
339 | 1249 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
171 | 1250 } |
1251 | |
116 | 1252 |
167 | 1253 ////////////////////////////////////////////////////////////////////////////// |
169
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1254 // Compute stops. |
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1255 // |
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1256 // Note: because this can be very long, break on 16 iterations, and set state |
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1257 // to 0 when finished, or to 1 when needing to continue. |
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1258 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
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1259 // break the loop when total time > 512msec. |
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1260 // |
116 | 1261 void calc_hauptroutine_calc_deco(void) |
1262 { | |
169
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1263 overlay unsigned char loop; |
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1264 |
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1265 for(loop = 0; loop < 16; ++loop) |
116 | 1266 { |
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1267 // Limit loops to 512ms, using the RTC timer 3: |
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1268 if( tmr3() & (512*32) ) |
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1269 break; |
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1270 |
241 | 1271 // Do not ascent while doing a gas switch ? |
203 | 1272 if( sim_gas_delay <= sim_dive_mins ) |
1273 { | |
241 | 1274 if( calc_nextdecodepth() ) |
1275 { | |
1276 if( temp_depth_limit == 0 ) | |
1277 goto Surface; | |
116 | 1278 |
241 | 1279 //---- We hit a stop at temp_depth_limit --------------------- |
317 | 1280 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
241 | 1281 + pres_surface; // To absolute. |
471 | 1282 if( !update_deco_table() ) // Adds a one minute stops. |
1283 goto Surface; // Deco table full: abort... | |
241 | 1284 } |
1285 else | |
1286 { | |
1287 //---- No stop ----------------------------------------------- | |
317 | 1288 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
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1289 |
241 | 1290 //---- Finish computations once surface is reached ----------- |
1291 if( temp_deco <= pres_surface ) | |
1292 { | |
1293 Surface: | |
471 | 1294 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
312
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1295 copy_deco_table(); |
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1296 |
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1297 calc_ascenttime(); |
471 | 1298 char_O_deco_status = 0; // calc nullzeit next time. |
1299 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
241 | 1300 return; |
1301 } | |
1302 } | |
212 | 1303 } |
1304 else | |
334
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1305 { |
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1306 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1307 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
471 | 1308 if( !update_deco_table() ) // Just pass one minute. |
1309 goto Surface; // Deco table full: abort... | |
334
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1310 } |
197 | 1311 |
241 | 1312 //---- Then update tissue -------------------------------------------- |
203 | 1313 sim_dive_mins++; // Advance simulated time by 1 minute. |
241 | 1314 gas_switch_set(); // Apply any simulated gas change, once validated. |
212 | 1315 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
192 | 1316 sim_tissue(1); // Simulate compartiments for 1 minute. |
116 | 1317 } |
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1318 |
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1319 // Surface not reached, need more stops... for menu animation. |
278 | 1320 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
116 | 1321 } |
1322 | |
167 | 1323 ////////////////////////////////////////////////////////////////////////////// |
169
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1324 // Simulation ascention to first deco stop. |
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1325 // |
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1326 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1327 // there is no need to break on more that 16 iterations |
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1328 // (or we are already in deep shit). |
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1329 // |
334
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1330 // Input: pres_respiration |
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1331 // Output: temp_deco |
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1332 // |
312
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1333 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1334 // before ascent. |
169
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1335 void sim_ascent_to_first_stop(void) |
116 | 1336 { |
171 | 1337 update_startvalues(); |
169
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1338 clear_deco_table(); |
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1339 |
200 | 1340 temp_deco = pres_respiration; // Starts from current real depth. |
169
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1341 |
312
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1342 // Are we doing the special @+5min variation ? |
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1343 if(char_O_deco_status & 4) |
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1344 sim_extra_time(); |
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1345 |
212 | 1346 // Do we have a gas switch going on ? |
1347 if( sim_gas_delay > sim_dive_mins ) | |
1348 return; | |
1349 | |
241 | 1350 //---- Loop until first stop, gas switch, or surface is reached ---------- |
169
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1351 for(;;) |
116 | 1352 { |
461 | 1353 overlay float old_deco = temp_deco; // Pamb backup (bars) |
460 | 1354 |
241 | 1355 // Try ascending 1 full minute. |
461 | 1356 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. |
1357 if( temp_deco < pres_surface ) // But don't go over surface. | |
1358 temp_deco = pres_surface; | |
203 | 1359 |
461 | 1360 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because |
1361 // one minute passed. | |
212 | 1362 sim_limit(GF_low); |
1363 | |
1364 // Did we reach deepest remaining stop ? | |
241 | 1365 if( temp_deco < sim_lead_tissue_limit ) |
212 | 1366 { |
461 | 1367 temp_deco = old_deco; // Restore last correct depth, |
1368 break; // Do no spend a minute more. | |
212 | 1369 } |
1370 | |
203 | 1371 // Did we reach surface ? |
460 | 1372 // NOTE: we should round BEFORE checking surface is reached. |
461 | 1373 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
1374 if( temp_depth_limit == 0 ) | |
203 | 1375 { |
1376 temp_deco = pres_surface; // Yes: finished ! | |
1377 break; | |
1378 } | |
169
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1379 |
241 | 1380 // Check for gas change below new depth ? |
1381 if( gas_switch_deepest() ) | |
1382 { | |
334
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1383 assert( temp_depth_limit > 0); |
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1384 |
317 | 1385 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
212 | 1386 break; |
241 | 1387 } |
171 | 1388 |
203 | 1389 sim_dive_mins++; // Advance simulated time by 1 minute. |
241 | 1390 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
203 | 1391 sim_tissue(1); // and update tissues for 1 min. |
1392 } | |
167 | 1393 } |
116 | 1394 |
167 | 1395 ////////////////////////////////////////////////////////////////////////////// |
312
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1396 // Simulation extra time at the current depth. |
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1397 // |
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1398 // This routine is used for @+5min feature. |
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1399 void sim_extra_time(void) |
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1400 { |
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1401 overlay unsigned char extra = read_custom_function(58); |
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1402 do { |
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1403 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1404 sim_tissue(1); // and update tissues for 1 min. |
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1405 } while( --extra != 0 ); |
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1406 } |
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1407 |
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1408 ////////////////////////////////////////////////////////////////////////////// |
167 | 1409 // calc_tissue |
1410 // | |
116 | 1411 // optimized in v.101 |
167 | 1412 // |
184 | 1413 static void calc_tissue(PARAMETER unsigned char period) |
116 | 1414 { |
251 | 1415 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1416 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1417 |
338 | 1418 for (ci=0;ci<NUM_COMP;ci++) |
126 | 1419 { |
258 | 1420 read_buhlmann_times(period); // 2 sec or 1 min period. |
116 | 1421 |
126 | 1422 // N2 |
339 | 1423 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
126 | 1424 temp_tissue_safety(); |
339 | 1425 pres_tissue_N2[ci] += temp_tissue; |
165 | 1426 |
126 | 1427 // He |
339 | 1428 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
126 | 1429 temp_tissue_safety(); |
339 | 1430 pres_tissue_He[ci] += temp_tissue; |
192 | 1431 } |
167 | 1432 } |
116 | 1433 |
167 | 1434 ////////////////////////////////////////////////////////////////////////////// |
192 | 1435 // calc_limit |
167 | 1436 // |
192 | 1437 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
167 | 1438 // |
258 | 1439 static void calc_limit(void) |
167 | 1440 { |
192 | 1441 char_O_gtissue_no = 255; |
1442 calc_lead_tissue_limit = 0.0; | |
1443 | |
338 | 1444 for(ci=0; ci<NUM_COMP;ci++) |
192 | 1445 { |
339 | 1446 overlay float N2 = pres_tissue_N2[ci]; |
1447 overlay float He = pres_tissue_He[ci]; | |
293
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1448 overlay float p = N2 + He; |
192 | 1449 |
258 | 1450 read_buhlmann_coefficients(); |
293
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1451 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1452 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
116 | 1453 |
192 | 1454 // Apply the Eric Baker's varying gradient factor correction. |
1455 // Note: the correction factor depends both on GF and b, | |
1456 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1457 // so that can change who is the leading gas... | |
1458 // Note: Also depends of the GF. So the calcul is different for | |
1459 // GF_low, current GF, or GF_high... | |
1460 // *BUT* calc_tissue() is used to compute bottom time, | |
1461 // hence what would happend at surface, | |
1462 // hence at GF_high. | |
509 | 1463 if( char_I_deco_model != 0 ) |
258 | 1464 p = ( p - var_N2_a * GF_high) * var_N2_b |
1465 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
192 | 1466 else |
1467 p = (p - var_N2_a) * var_N2_b; | |
258 | 1468 if( p < 0.0 ) p = 0.0; |
192 | 1469 |
1470 if( p > calc_lead_tissue_limit ) | |
1471 { | |
1472 char_O_gtissue_no = ci; | |
1473 calc_lead_tissue_limit = p; | |
1474 } | |
1475 } | |
197 | 1476 |
338 | 1477 assert( char_O_gtissue_no < NUM_COMP ); |
197 | 1478 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
167 | 1479 } |
1480 | |
1481 ////////////////////////////////////////////////////////////////////////////// | |
1482 // calc_nullzeit | |
1483 // | |
1484 // calculates the remaining bottom time | |
1485 // | |
511
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1486 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second |
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1487 // exponential term to the M-value equation, making it impossible to |
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1488 // invert... So we have to make a fast-simu until we find a better way. |
509 | 1489 // |
1490 // Input: pres_respiration | |
1491 // Output: char_O_nullzeit | |
167 | 1492 // |
1493 static void calc_nullzeit(void) | |
1494 { | |
511
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1495 //---- Compute ppN2 and ppHe --------------------------------------------- |
509 | 1496 temp_deco = pres_respiration; |
1497 sim_alveolar_presures(); | |
167 | 1498 |
509 | 1499 char_O_nullzeit = 240; |
1500 for(ci=0; ci<NUM_COMP; ci++) | |
1501 { | |
511
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1502 //---- Read A/B values and loading factor for N2 and He -------------- |
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1503 overlay float tN2 = pres_tissue_N2[ci]; |
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1504 overlay float tHe = pres_tissue_He[ci]; |
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1505 overlay float t = tN2 + tHe; |
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1506 overlay unsigned char ndl; |
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1507 overlay unsigned char period = 10; |
192 | 1508 |
509 | 1509 read_buhlmann_coefficients(); |
511
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1510 read_buhlmann_times(2); // Starts with a 10min period. |
509 | 1511 |
511
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1512 //---- Simulate for that tissue -------------------------------------- |
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1513 // NOTE: No need to simulate for longuer than the already found NDL. |
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1514 for(ndl=0; ndl<char_O_nullzeit;) |
509 | 1515 { |
511
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1516 //---- Compute updated mix M-value at surface |
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1517 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; |
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1518 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; |
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1519 overlay float M0 = (a + pres_surface/b); |
116 | 1520 |
511
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1521 //---- Add 10min/1min to N2/He tissues |
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1522 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; |
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1523 overlay float dTHe = (ppHe - tHe) * var_He_e; |
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1524 |
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1525 //---- Apply security margin when using the non-GF model |
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1526 if( char_I_deco_model == 0 ) |
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1527 { |
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1528 dTN2 *= float_saturation_multiplier; |
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1529 dTHe *= float_saturation_multiplier; |
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1530 } |
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1531 else // Or GF-based model |
509 | 1532 M0 = GF_high * (M0 - pres_surface) + pres_surface; |
167 | 1533 |
511
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1534 //---- Simulate off-gasing while going to surface |
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1535 // TODO ! |
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1536 // dTN2 -= exp( ... ascent time ... ppN2...) |
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1537 // dTHe -= exp( ... ascent time ... ppHe...) |
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1538 |
534
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1539 //---- Ok now, and still ok to surface after 1 or 10 minutes ? |
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1540 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) |
509 | 1541 { |
511
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1542 tN2 += dTN2; // YES: apply gas loadings, |
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1543 tHe += dTHe; |
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1544 t = tN2 + tHe; |
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1545 ndl += period; // increment NDL, |
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1546 continue; // and loop. |
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1547 } |
116 | 1548 |
511
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1549 //---- Should we retry with smaller steps ? |
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1550 if( period == 10 ) |
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1551 { |
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1552 read_buhlmann_times(1); // 1min coefs. |
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1553 period = 1; |
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1554 continue; |
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1555 } |
167 | 1556 |
511
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1557 //---- ELSE make a linear approx for the last minute |
524 | 1558 // Usefull to have a meaningfull rounding of NDL. |
1559 // But ONLY it positive (negativ casted to unsigned is bad). | |
1560 if( M0 > t ) | |
1561 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
511
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1562 break; |
509 | 1563 } |
511
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1564 |
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1565 // Keep the shortest NDL found |
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1566 if( ndl < char_O_nullzeit ) |
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1567 char_O_nullzeit = ndl; |
339 | 1568 } |
167 | 1569 } |
116 | 1570 |
167 | 1571 ////////////////////////////////////////////////////////////////////////////// |
1572 // calc_ascenttime | |
1573 // | |
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1574 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1575 // and all stops. |
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1576 // |
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1577 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
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1578 static void calc_ascenttime(void) |
116 | 1579 { |
323 | 1580 overlay unsigned char x; |
1581 overlay unsigned short sum; | |
168 | 1582 |
323 | 1583 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
1584 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
1585 if (ascent < 0.0) | |
1586 ascent = 0.0; | |
1587 sum = (unsigned short)(ascent + 0.99); | |
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1588 |
338 | 1589 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
323 | 1590 sum += (unsigned short)internal_deco_time[x]; |
1591 | |
1592 if( char_O_deco_status == 1 ) | |
1593 int_O_ascenttime = sum; | |
126 | 1594 else |
323 | 1595 int_O_extra_ascenttime = sum; |
167 | 1596 } |
116 | 1597 |
167 | 1598 ////////////////////////////////////////////////////////////////////////////// |
1599 // update_startvalues | |
1600 // | |
116 | 1601 // updated in v.102 |
167 | 1602 // |
116 | 1603 void update_startvalues(void) |
1604 { | |
167 | 1605 overlay unsigned char x; |
116 | 1606 |
201 | 1607 // Start ascent simulation with current tissue partial pressures. |
339 | 1608 for(x=0; x<NUM_COMP; x++) |
116 | 1609 { |
339 | 1610 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
1611 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
116 | 1612 } |
197 | 1613 |
201 | 1614 // No leading tissue (yet) for this ascent simulation. |
197 | 1615 sim_lead_tissue_limit = 0.0; |
1616 sim_lead_tissue_no = 255; | |
167 | 1617 } |
116 | 1618 |
167 | 1619 ////////////////////////////////////////////////////////////////////////////// |
192 | 1620 // sim_tissue |
167 | 1621 // |
116 | 1622 // optimized in v.101 |
167 | 1623 // |
1624 // Function very simular to calc_tissue, but: | |
1625 // + Use a 1min or 10min period. | |
1626 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
184 | 1627 static void sim_tissue(PARAMETER unsigned char period) |
116 | 1628 { |
251 | 1629 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1630 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1631 |
338 | 1632 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1633 { |
258 | 1634 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
165 | 1635 |
126 | 1636 // N2 |
339 | 1637 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
126 | 1638 temp_tissue_safety(); |
339 | 1639 sim_pres_tissue_N2[ci] += temp_tissue; |
126 | 1640 |
1641 // He | |
339 | 1642 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
126 | 1643 temp_tissue_safety(); |
339 | 1644 sim_pres_tissue_He[ci] += temp_tissue; |
192 | 1645 } |
167 | 1646 } |
116 | 1647 |
167 | 1648 ////////////////////////////////////////////////////////////////////////////// |
192 | 1649 // sim_limit() |
1650 // | |
1651 // New in v.111 | |
1652 // | |
1653 // Function separated from sim_tissue() to allow recomputing limit on | |
1654 // different depth, because it depends on current gradient factor. | |
167 | 1655 // |
192 | 1656 static void sim_limit(PARAMETER float GF_current) |
116 | 1657 { |
212 | 1658 assert( 0.0 < GF_current && GF_current <= 1.0f); |
1659 | |
192 | 1660 sim_lead_tissue_limit = 0.0; |
212 | 1661 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
192 | 1662 |
338 | 1663 for(ci=0; ci<NUM_COMP; ci++) |
192 | 1664 { |
339 | 1665 overlay float N2 = sim_pres_tissue_N2[ci]; |
1666 overlay float He = sim_pres_tissue_He[ci]; | |
241 | 1667 overlay float p = N2 + He; |
192 | 1668 |
258 | 1669 read_buhlmann_coefficients(); |
241 | 1670 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
1671 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
192 | 1672 |
1673 // Apply the Eric Baker's varying gradient factor correction. | |
1674 // Note: the correction factor depends both on GF and b, | |
1675 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1676 // so that can change who is the leading gas... | |
1677 // Note: Also depends of the GF_current... | |
509 | 1678 if( char_I_deco_model != 0 ) |
302 | 1679 p = ( p - var_N2_a * GF_current) |
1680 / (GF_current / var_N2_b + 1.0 - GF_current); | |
192 | 1681 else |
1682 p = (p - var_N2_a) * var_N2_b; | |
237 | 1683 if( p < 0.0 ) p = 0.0; |
192 | 1684 |
1685 if( p > sim_lead_tissue_limit ) | |
1686 { | |
1687 sim_lead_tissue_no = ci; | |
1688 sim_lead_tissue_limit = p; | |
1689 } | |
1690 } // for ci | |
197 | 1691 |
338 | 1692 assert( sim_lead_tissue_no < NUM_COMP ); |
237 | 1693 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
167 | 1694 } |
116 | 1695 |
167 | 1696 ////////////////////////////////////////////////////////////////////////////// |
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1697 // clear_deco_table |
167 | 1698 // |
1699 // unchanged in v.101 | |
1700 // | |
169
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1701 static void clear_deco_table(void) |
116 | 1702 { |
169
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1703 overlay unsigned char x; |
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1704 |
338 | 1705 for(x=0; x<NUM_STOPS; ++x) |
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1706 { |
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1707 internal_deco_time [x] = 0; |
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1708 internal_deco_depth[x] = 0; |
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1709 } |
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1710 } |
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1711 |
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1712 ////////////////////////////////////////////////////////////////////////////// |
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1713 // update_deco_table |
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1714 // |
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1715 // Add 1 min to current stop. |
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1716 // |
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1717 // Inputs: |
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1718 // temp_depth_limit = stop's depth, in meters. |
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1719 // In/Out: |
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1720 // internal_deco_depth[] : depth (in metres) of each stops. |
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1721 // internal_deco_time [] : time (in minutes) of each stops. |
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1722 // |
471 | 1723 static unsigned char update_deco_table() |
169
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1724 { |
192 | 1725 overlay unsigned char x; |
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1726 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1727 assert( temp_depth_limit > 0 ); // No stop at surface... |
169
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1728 |
338 | 1729 for(x=0; x<NUM_STOPS; ++x) |
192 | 1730 { |
212 | 1731 // Make sure deco-stops are recorded in order: |
334
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1732 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
212 | 1733 |
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1734 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
192 | 1735 { |
1736 // Do not overflow (max 255') | |
1737 if( internal_deco_time[x] < 255 ) | |
1738 { | |
1739 internal_deco_time[x]++; | |
471 | 1740 return 1; |
192 | 1741 } |
1742 // But store extra in the next stop... | |
169
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1743 } |
192 | 1744 |
169
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1745 if( internal_deco_depth[x] == 0 ) |
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1746 { |
192 | 1747 internal_deco_depth[x] = temp_depth_limit; |
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1748 if( sim_gas_delay >= sim_dive_mins ) |
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1749 internal_deco_depth[x] |= 0x80; |
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1750 |
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1751 internal_deco_time[x] = 1; |
471 | 1752 return 1; |
169
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1753 } |
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1754 } |
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1755 |
192 | 1756 // Can't store stops at more than 96m. |
1757 // Or stops at less that 3m too. | |
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1758 // Just do nothing with that... |
471 | 1759 return 0; |
167 | 1760 } |
116 | 1761 |
167 | 1762 ////////////////////////////////////////////////////////////////////////////// |
1763 // calc_gradient_factor | |
1764 // | |
165 | 1765 // optimized in v.101 (var_N2_a) |
116 | 1766 // new code in v.102 |
167 | 1767 // |
1768 static void calc_gradient_factor(void) | |
116 | 1769 { |
197 | 1770 overlay float gf; |
339 | 1771 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
1772 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
237 | 1773 |
338 | 1774 assert( char_O_gtissue_no < NUM_COMP ); |
237 | 1775 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
197 | 1776 |
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1777 // tissue > respiration (currently off-gasing) |
302 | 1778 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
1779 // GF = 100% when respiration == limit. | |
293
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1780 temp_tissue = N2 + He; |
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1781 if( temp_tissue <= pres_respiration ) |
197 | 1782 gf = 0.0; |
1783 else | |
1784 { | |
293
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1785 overlay float limit = calc_lead_tissue_limit; |
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1786 // NOTE: in GF model, calc_lead_tissue_limit include already the |
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1787 // correction due to gradient factor. To compute the actual |
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1788 // current GF, we need to (re-)compute the raw ambiant-pressure |
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1789 // limit from the Bühlmann model. |
509 | 1790 if( char_I_deco_model != 0 ) |
293
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1791 { |
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1792 ci = char_O_gtissue_no; |
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1793 read_buhlmann_coefficients(); |
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1794 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1795 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1796 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1797 } |
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1798 |
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1799 gf = (temp_tissue - pres_respiration) |
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1800 / (temp_tissue - limit) |
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1801 * 100.0; |
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1802 if( gf > 254.5 ) gf = 255.0; |
197 | 1803 if( gf < 0.0 ) gf = 0.0; |
1804 } | |
293
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1805 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
116 | 1806 |
509 | 1807 if( char_I_deco_model != 0 ) // calculate relative gradient factor |
116 | 1808 { |
197 | 1809 overlay float rgf; |
1810 | |
562 | 1811 if( low_depth < 3 ) |
197 | 1812 rgf = GF_high; |
1813 else | |
1814 { | |
317 | 1815 overlay float temp1 = low_depth * METER_TO_BAR; |
197 | 1816 overlay float temp2 = pres_respiration - pres_surface; |
186 | 1817 |
197 | 1818 if (temp2 <= 0) |
1819 rgf = GF_high; | |
1820 else if (temp2 >= temp1) | |
1821 rgf = GF_low; | |
1822 else | |
1823 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
1824 } | |
186 | 1825 |
197 | 1826 rgf = gf / rgf; // gf is already in percent |
1827 if( rgf < 0.0 ) rgf = 0.0; | |
293
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1828 if( rgf > 254.5 ) rgf = 255.0; |
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1829 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
116 | 1830 } // calc relative gradient factor |
1831 else | |
1832 { | |
186 | 1833 char_O_relative_gradient_GF = char_O_gradient_factor; |
116 | 1834 } |
167 | 1835 } |
116 | 1836 |
167 | 1837 ////////////////////////////////////////////////////////////////////////////// |
1838 // deco_calc_desaturation_time | |
1839 // | |
116 | 1840 // FIXED N2_ratio |
1841 // unchanged in v.101 | |
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1842 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
233 | 1843 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
167 | 1844 // |
116 | 1845 void deco_calc_desaturation_time(void) |
1846 { | |
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1847 RESET_C_STACK |
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1848 |
233 | 1849 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1850 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1851 | |
237 | 1852 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
233 | 1853 pres_surface = int_I_pres_surface * 0.001; |
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1854 ppN2 = N2_ratio * (pres_surface - ppWater); |
126 | 1855 int_O_desaturation_time = 0; |
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1856 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
233 | 1857 |
339 | 1858 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1859 { |
251 | 1860 overlay unsigned short desat_time; // For a particular compartiment, in min. |
1861 overlay float temp1; | |
1862 overlay float temp2; | |
1863 overlay float temp3; | |
1864 overlay float temp4; | |
338 | 1865 |
509 | 1866 read_buhlmann_ht(); |
338 | 1867 |
126 | 1868 // saturation_time (for flight) and N2_saturation in multiples of halftime |
1869 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
1870 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
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1871 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
126 | 1872 // N2 |
339 | 1873 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
1874 temp2 = ppN2 - pres_tissue_N2[ci]; | |
126 | 1875 if (temp2 >= 0.0) |
233 | 1876 temp1 = 0.0; |
126 | 1877 else |
1878 temp1 = temp1 / temp2; | |
601
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1879 |
251 | 1880 if( 0.0 < temp1 && temp1 < 1.0 ) |
126 | 1881 { |
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1882 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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1883 // minus because log is negative. |
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1884 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
509 | 1885 temp2 = var_N2_ht * temp1 / float_desaturation_multiplier; // time necessary (in minutes ) for complete desaturation (see comment about 5 percent) , new in v.101: float_desaturation_multiplier |
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1886 |
126 | 1887 } |
1888 else | |
1889 { | |
233 | 1890 temp1 = 0.0; |
1891 temp2 = 0.0; | |
126 | 1892 } |
116 | 1893 |
126 | 1894 // He |
339 | 1895 temp3 = 0.1 - pres_tissue_He[ci]; |
126 | 1896 if (temp3 >= 0.0) |
233 | 1897 temp3 = 0.0; |
126 | 1898 else |
339 | 1899 temp3 = - temp3 / pres_tissue_He[ci]; |
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1900 |
251 | 1901 if( 0.0 < temp3 && temp3 < 1.0 ) |
126 | 1902 { |
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1903 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
126 | 1904 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
1905 // minus because log is negative | |
509 | 1906 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
126 | 1907 } |
1908 else | |
1909 { | |
233 | 1910 temp3 = 0.0; |
1911 temp4 = 0.0; | |
126 | 1912 } |
116 | 1913 |
126 | 1914 // saturation_time (for flight) |
1915 if (temp4 > temp2) | |
203 | 1916 desat_time = (unsigned short)temp4; |
126 | 1917 else |
203 | 1918 desat_time = (unsigned short)temp2; |
252 | 1919 |
251 | 1920 if(desat_time > int_O_desaturation_time) |
1921 int_O_desaturation_time = desat_time; | |
116 | 1922 |
126 | 1923 // N2 saturation in multiples of halftime for display purposes |
339 | 1924 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1925 temp2 = temp2 + 80.0; // set center | |
126 | 1926 if (temp2 < 0.0) |
1927 temp2 = 0.0; | |
1928 if (temp2 > 255.0) | |
1929 temp2 = 255.0; | |
339 | 1930 char_O_tissue_N2_saturation[ci] = (char)temp2; |
233 | 1931 |
126 | 1932 // He saturation in multiples of halftime for display purposes |
339 | 1933 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1934 temp4 = temp4 + 80.0; // set center | |
126 | 1935 if (temp4 < 0.0) |
1936 temp4 = 0.0; | |
1937 if (temp4 > 255.0) | |
1938 temp4 = 255.0; | |
339 | 1939 char_O_tissue_He_saturation[ci] = (char)temp4; |
126 | 1940 } // for |
167 | 1941 } |
116 | 1942 |
167 | 1943 ////////////////////////////////////////////////////////////////////////////// |
1944 // calc_wo_deco_step_1_min | |
1945 // | |
116 | 1946 // FIXED N2 Ratio |
1947 // optimized in v.101 (...saturation_multiplier) | |
1948 // desaturation slowed down to 70,42% | |
167 | 1949 // |
1950 static void calc_wo_deco_step_1_min(void) | |
116 | 1951 { |
251 | 1952 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1953 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
1954 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
1955 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1956 | |
126 | 1957 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
368 | 1958 pres_respiration = pres_surface = int_I_pres_surface * 0.001; |
1959 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
200 | 1960 ppHe = 0.0; |
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1961 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
197 | 1962 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
126 | 1963 |
339 | 1964 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
167 | 1965 |
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1966 clear_deco_table(); |
200 | 1967 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
126 | 1968 char_O_nullzeit = 0; |
168 | 1969 int_O_ascenttime = 0; |
323 | 1970 int_O_extra_ascenttime = 0; |
126 | 1971 calc_gradient_factor(); |
167 | 1972 } |
126 | 1973 |
167 | 1974 ////////////////////////////////////////////////////////////////////////////// |
368 | 1975 // calc_dive_interval |
1976 // | |
1977 // Prepare tissue for delay before the next dive simulation. | |
1978 // | |
1979 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
1980 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
1981 // | |
1982 // Should be protected by deco_push_tissues_to_vault(), | |
1983 // deco_pull_tissues_from_vault() | |
1984 // | |
1985 // desaturation slowed down to 70,42%. | |
1986 // | |
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1987 static void calc_dive_interval(void) |
368 | 1988 { |
1989 overlay unsigned char t; | |
491
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1990 overlay unsigned char backup_model; |
368 | 1991 |
1992 //---- Initialize simulation parameters ---------------------------------- | |
1993 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
1994 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
1995 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
1996 ppHe = 0.0; | |
491
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1997 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
368 | 1998 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
1999 | |
568 | 2000 // Make sure SURFACE_DESAT_FACTOR is applied: |
491
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2001 backup_model = char_I_deco_model; |
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2002 char_I_deco_model = 0; |
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2003 |
368 | 2004 //---- Perform simulation ------------------------------------------------ |
2005 for(t=0; t<char_I_dive_interval; ++t) | |
2006 { | |
2007 calc_tissue(2); // period = 10min. | |
2008 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
2009 } | |
514 | 2010 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
2011 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); | |
491
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2012 |
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2013 //---- Restore model ----------------------------------------------------- |
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2014 char_I_deco_model = backup_model; |
368 | 2015 } |
2016 | |
2017 ////////////////////////////////////////////////////////////////////////////// | |
167 | 2018 ////////////////////////////////////////////////////////////////////////////// |
2019 ////////////////////////////////// deco_hash ///////////////////////////////// | |
2020 ////////////////////////////////////////////////////////////////////////////// | |
2021 ////////////////////////////////////////////////////////////////////////////// | |
126 | 2022 |
184 | 2023 #ifndef CROSS_COMPILE |
116 | 2024 void deco_hash(void) |
2025 { | |
167 | 2026 overlay unsigned char md_i, md_j; // Loop index. |
2027 overlay unsigned char md_t; | |
2028 overlay unsigned char md_buffer[16]; | |
2029 overlay unsigned char md_temp; | |
203 | 2030 overlay unsigned short md_pointer; |
167 | 2031 |
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2032 RESET_C_STACK |
126 | 2033 |
2034 // init | |
164 | 2035 for(md_i=0;md_i<16;md_i++) |
126 | 2036 { |
2037 md_state[md_i] = 0; | |
164 | 2038 char_O_hash[md_i] = 0; |
126 | 2039 } // for md_i 16 |
116 | 2040 |
126 | 2041 _asm |
167 | 2042 movlw 0x01 // md_pi address. |
2043 movwf TBLPTRU,0 | |
2044 movlw 0x7E | |
2045 movwf TBLPTRH,0 | |
2046 movlw 0x00 | |
2047 movwf TBLPTRL,0 | |
126 | 2048 _endasm; |
165 | 2049 md_i = 0; |
2050 do { | |
126 | 2051 _asm |
2052 TBLRDPOSTINC | |
2053 movff TABLAT,md_temp | |
2054 _endasm | |
165 | 2055 md_pi_subst[md_i++] = md_temp; |
2056 } while( md_i != 0 ); | |
2057 | |
126 | 2058 _asm |
167 | 2059 movlw 0x00 |
2060 movwf TBLPTRU,0 | |
2061 movlw 0x00 | |
2062 movwf TBLPTRH,0 | |
2063 movlw 0x00 | |
2064 movwf TBLPTRL,0 | |
126 | 2065 _endasm |
167 | 2066 |
126 | 2067 // cycle buffers |
2068 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
2069 { | |
2070 md_t = 0; | |
2071 for (md_i=0;md_i<16;md_i++) | |
2072 { | |
2073 if(md_pointer == 9) | |
164 | 2074 md_temp = char_O_hash[md_i]; |
126 | 2075 else |
2076 { | |
2077 _asm | |
167 | 2078 TBLRDPOSTINC |
2079 movff TABLAT,md_temp | |
126 | 2080 _endasm |
2081 } // else | |
167 | 2082 |
2083 md_buffer[md_i] = md_temp; | |
186 | 2084 md_state[md_i+16] = md_temp; |
2085 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
126 | 2086 } // for md_i 16 |
2087 | |
2088 for (md_i=0;md_i<18;md_i++) | |
2089 { | |
2090 for (md_j=0;md_j<48;md_j++) | |
2091 { | |
167 | 2092 md_state[md_j] ^= md_pi_subst[md_t]; |
126 | 2093 md_t = md_state[md_j]; |
2094 } // for md_j 48 | |
2095 md_t = (unsigned char)(md_t+1); | |
2096 } // for md_i 18 | |
164 | 2097 md_t = char_O_hash[15]; |
126 | 2098 |
2099 for (md_i=0;md_i<16;md_i++) | |
2100 { | |
167 | 2101 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
164 | 2102 md_t = char_O_hash[md_i]; |
126 | 2103 } // for md_i 16 |
2104 } // for md_pointer | |
116 | 2105 } // void deco_hash(void) |
184 | 2106 #endif |
116 | 2107 |
167 | 2108 ////////////////////////////////////////////////////////////////////////////// |
2109 // deco_clear_CNS_fraction | |
2110 // | |
116 | 2111 // new in v.101 |
167 | 2112 // |
116 | 2113 void deco_clear_CNS_fraction(void) |
2114 { | |
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2115 RESET_C_STACK |
237 | 2116 |
126 | 2117 CNS_fraction = 0.0; |
2118 char_O_CNS_fraction = 0; | |
167 | 2119 } |
116 | 2120 |
167 | 2121 ////////////////////////////////////////////////////////////////////////////// |
2122 // deco_calc_CNS_fraction | |
2123 // | |
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2124 // Input: char_I_actual_ppO2 : Current condition (in decibars). |
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2125 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. |
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2126 // CNS_fraction : velue before period. |
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2127 // Output: CNS_fraction, char_O_CNS_fraction |
167 | 2128 // |
116 | 2129 void deco_calc_CNS_fraction(void) |
2130 { | |
292 | 2131 overlay float time_factor = 1.0f; |
126 | 2132 RESET_C_STACK |
167 | 2133 |
471 | 2134 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2135 assert( char_I_actual_ppO2 > 15 ); |
2136 | |
439
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2137 if( char_I_step_is_1min == 1 ) |
292 | 2138 time_factor = 30.0f; |
439
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2139 else if( char_I_step_is_1min == 2 ) |
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2140 time_factor = 300.0f; |
116 | 2141 |
126 | 2142 if (char_I_actual_ppO2 < 50) |
292 | 2143 ; // no changes |
126 | 2144 else if (char_I_actual_ppO2 < 60) |
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2145 CNS_fraction += time_factor/(-540.0 * char_I_actual_ppO2 + 54000.0); |
126 | 2146 else if (char_I_actual_ppO2 < 70) |
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2147 CNS_fraction += time_factor/(-450.0 * char_I_actual_ppO2 + 48600.0); |
126 | 2148 else if (char_I_actual_ppO2 < 80) |
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2149 CNS_fraction += time_factor/(-360.0 * char_I_actual_ppO2 + 42300.0); |
126 | 2150 else if (char_I_actual_ppO2 < 90) |
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2151 CNS_fraction += time_factor/(-270.0 * char_I_actual_ppO2 + 35100.0); |
126 | 2152 else if (char_I_actual_ppO2 < 110) |
439
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2153 CNS_fraction += time_factor/(-180.0 * char_I_actual_ppO2 + 27000.0); |
126 | 2154 else if (char_I_actual_ppO2 < 150) |
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2155 CNS_fraction += time_factor/( -90.0 * char_I_actual_ppO2 + 17100.0); |
126 | 2156 else if (char_I_actual_ppO2 < 160) |
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2157 CNS_fraction += time_factor/(-225.0 * char_I_actual_ppO2 + 37350.0); |
126 | 2158 else if (char_I_actual_ppO2 < 165) |
292 | 2159 CNS_fraction += time_factor*0.000755; // Arieli et all.(2002): Modeling pulmonary and CNS O2 toxicity... Formula (A1) based on value for 1.55 and c=20 |
126 | 2160 else if (char_I_actual_ppO2 < 170) |
292 | 2161 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
126 | 2162 else if (char_I_actual_ppO2 < 175) |
292 | 2163 CNS_fraction += time_factor*0.00136; |
126 | 2164 else if (char_I_actual_ppO2 < 180) |
292 | 2165 CNS_fraction += time_factor*0.00180; |
126 | 2166 else if (char_I_actual_ppO2 < 185) |
292 | 2167 CNS_fraction += time_factor*0.00237; |
126 | 2168 else if (char_I_actual_ppO2 < 190) |
292 | 2169 CNS_fraction += time_factor*0.00310; |
126 | 2170 else if (char_I_actual_ppO2 < 195) |
292 | 2171 CNS_fraction += time_factor*0.00401; |
126 | 2172 else if (char_I_actual_ppO2 < 200) |
292 | 2173 CNS_fraction += time_factor*0.00517; |
126 | 2174 else if (char_I_actual_ppO2 < 230) |
292 | 2175 CNS_fraction += time_factor*0.0209; |
126 | 2176 else |
292 | 2177 CNS_fraction += time_factor*0.0482; // value for 2.5 |
116 | 2178 |
514 | 2179 if( CNS_fraction > 2.5 ) |
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2180 CNS_fraction = 2.55; |
514 | 2181 if( CNS_fraction < 0.0 ) |
126 | 2182 CNS_fraction = 0.0; |
2183 | |
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2184 char_O_CNS_fraction = (unsigned char)(100.0 * CNS_fraction + 0.5); |
167 | 2185 } |
116 | 2186 |
167 | 2187 ////////////////////////////////////////////////////////////////////////////// |
439
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2188 // deco_calc_CNS_planning |
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2189 // |
511
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2190 // Compute CNS during predicted ascent. |
488 | 2191 // |
2192 // Note: Needs a call to deco_push_tissues_to_vault(), | |
2193 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
2194 // | |
2195 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
2196 // Output: CNS_fraction, char_O_CNS_fraction | |
2197 // | |
439
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2198 void deco_calc_CNS_planning(void) |
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2199 { |
490
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2200 overlay unsigned char backup_gas_last_depth; |
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2201 overlay unsigned char backup_gas_last_used; |
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2202 overlay unsigned short backup_gas_delay; |
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2203 overlay unsigned short backup_dive_mins; |
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2204 overlay unsigned char backup_actual_ppO2; |
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2205 |
439
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2206 RESET_C_STACK |
490
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2207 |
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2208 // Backup state machine |
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2209 backup_gas_last_depth = sim_gas_last_depth; |
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2210 backup_gas_last_used = sim_gas_last_used; |
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2211 backup_gas_delay = sim_gas_delay; |
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2212 backup_dive_mins = sim_dive_mins; |
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2213 backup_actual_ppO2 = char_I_actual_ppO2; |
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2214 |
439
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2215 // Uses 1min CNS period: |
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2216 char_I_step_is_1min = 1; |
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2217 |
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2218 //---- Retrieve bottom Gas used, and set variables. |
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2219 sim_gas_last_used = char_I_first_gas; |
443
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2220 sim_gas_last_depth = 0; // Surface gas marker. |
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2221 gas_switch_set(); // Sets initial calc_N2/He_ratio |
439
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2222 |
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2223 //---- CCR mode : do the full TTS at once -------------------------------- |
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2224 if( char_I_const_ppO2 != 0 ) |
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2225 { |
443
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2226 overlay unsigned short t; // Needs 16bits here ! |
439
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2227 char_I_actual_ppO2 = char_I_const_ppO2; |
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2228 for(t=0; t<int_O_ascenttime; ++t) |
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2229 deco_calc_CNS_fraction(); |
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2230 } |
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2231 else //---- OC mode : have to follow all gas switches... ----------------- |
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2232 { |
443
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2233 overlay unsigned char i = 0; // Decostop loop counter |
439
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2234 overlay float actual_ppO2; |
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2235 overlay unsigned char time, t; |
563 | 2236 overlay unsigned char deepest_first = (read_custom_function(54) == 0); |
439
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2237 |
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2238 //---- Ascent to surface delay |
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2239 // NOTE: count as if time is spent with bottom pressure, |
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2240 // AND the bottom gas |
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2241 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) |
439
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2242 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2243 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2244 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2245 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2246 |
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2247 // Ascent time (rounded up): |
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2248 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); |
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2249 |
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2250 for(t=0; t<time; ++t) |
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2251 { |
439
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2252 deco_calc_CNS_fraction(); |
490
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2253 sim_dive_mins++; |
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2254 } |
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2255 |
563 | 2256 //---- Do all further stops ------------------------------------------ |
439
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2257 for(i=0; i<NUM_STOPS; ++i) |
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2258 { |
563 | 2259 overlay unsigned char switch_gas; |
2260 | |
2261 //---- Get next stop, possibly in reverse order ------------------ | |
2262 if( deepest_first ) | |
2263 { | |
2264 time = char_O_deco_time[i]; | |
2265 temp_depth_limit = char_O_deco_depth[i]; | |
2266 } | |
2267 else | |
2268 { | |
2269 time = char_O_deco_time[(NUM_STOPS-1)-i]; | |
2270 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i]; | |
2271 } | |
2272 if( time == 0 ) continue; | |
439
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2273 |
563 | 2274 //---- Gas Switch ? ---------------------------------------------- |
2275 switch_gas = temp_depth_limit & 0x80; // Switch flag. | |
2276 temp_depth_limit &= 0x7F; // True stop depth. | |
2277 | |
2278 if( switch_gas ) | |
2279 { | |
2280 gas_switch_deepest(); | |
2281 gas_switch_set(); | |
2282 } | |
2283 | |
2284 //---- Convert Depth and N2_ratio to ppO2 ------------------------ | |
541
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2285 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) |
439
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2286 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2287 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2288 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2289 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2290 |
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2291 //---- Apply the stop |
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2292 for(t=0; t<time; ++t) |
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2293 { |
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2294 deco_calc_CNS_fraction(); |
490
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2295 sim_dive_mins++; |
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2296 } |
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2297 } |
488 | 2298 } |
2299 | |
563 | 2300 //---- Back to normal mode... -------------------------------------------- |
488 | 2301 char_I_step_is_1min = 0; |
490
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2302 sim_gas_last_depth = backup_gas_last_depth; |
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2303 sim_gas_last_used = backup_gas_last_used; |
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2304 sim_gas_delay = backup_gas_delay; |
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2305 sim_dive_mins = backup_dive_mins; |
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2306 char_I_actual_ppO2 = backup_actual_ppO2; |
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2307 } |
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2308 |
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2309 ////////////////////////////////////////////////////////////////////////////// |
167 | 2310 // deco_calc_CNS_decrease_15min |
2311 // | |
116 | 2312 // new in v.101 |
167 | 2313 // |
116 | 2314 // calculates the half time of 90 minutes in 6 steps of 15 min |
200 | 2315 // (Used in sleepmode, for low battery mode). |
167 | 2316 // |
116 | 2317 // Output: char_O_CNS_fraction |
2318 // Uses and Updates: CNS_fraction | |
167 | 2319 // |
116 | 2320 void deco_calc_CNS_decrease_15min(void) |
2321 { | |
237 | 2322 RESET_C_STACK |
514 | 2323 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2324 |
126 | 2325 CNS_fraction = 0.890899 * CNS_fraction; |
514 | 2326 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
167 | 2327 } |
116 | 2328 |
167 | 2329 ////////////////////////////////////////////////////////////////////////////// |
2330 // deco_calc_percentage | |
2331 // | |
116 | 2332 // new in v.101 |
167 | 2333 // |
116 | 2334 // calculates int_I_temp * char_I_temp / 100 |
2335 // output is int_I_temp | |
200 | 2336 // |
2337 // Used to compute NoFly remaining time. | |
222
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2338 // |
116 | 2339 void deco_calc_percentage(void) |
2340 { | |
122
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2341 RESET_C_STACK |
222
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2342 |
237 | 2343 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
564 | 2344 assert( int_I_temp < 5760 ); // Less than 4 days = 96h... |
237 | 2345 |
222
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2346 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
237 | 2347 |
554
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2348 assert( int_I_temp < 5760 ); // Less than 96h too... |
222
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2349 } |
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2350 |
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2351 |
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2352 ////////////////////////////////////////////////////////////////////////////// |
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2353 // deco_gas_volumes |
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2354 // |
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2355 // new in v.111 |
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2356 // |
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2357 // calculates volumes for each gas. |
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2358 // |
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2359 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
240
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2360 // Gas list. |
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2361 // char_I_first_gas is the bottom gas. |
222
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2362 // decoplan (char_O_deco_depth, char_O_deco_time). |
234
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2363 // CF#54 == TRUE if shallowest stop first. |
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2364 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min. |
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2365 // CF#57 == deco liters/minutes (5 .. 50) or bar/min. |
224 | 2366 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
222
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2367 // |
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2368 void deco_gas_volumes(void) |
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2369 { |
338 | 2370 overlay float volumes[NUM_GAS]; |
478
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2371 overlay float bottom_usage, deco_usage; |
234
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2372 overlay unsigned char i, deepest_first; |
241 | 2373 overlay unsigned char gas; |
222
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2374 RESET_C_STACK |
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2375 |
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2376 //---- initialize with bottom consumption -------------------------------- |
338 | 2377 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
240
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2378 volumes[i] = 0.0; |
222
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2379 |
338 | 2380 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
241 | 2381 gas = char_I_first_gas - 1; |
2382 | |
478
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2383 bottom_usage = (float) read_custom_function(56); |
580
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BUGFIX: GasVolume should not count bottom time/depth in CCR mode.
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|
2384 if( char_I_const_ppO2 == 0 && bottom_usage > 0.0 ) |
265 | 2385 volumes[gas] |
2386 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
2387 * char_I_bottom_time // in minutes. | |
2388 * bottom_usage; // In liter/minutes. | |
579
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2389 |
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|
2390 //---- Starts by a gas switch ? ------------------------------------------ |
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2391 // If there is no special gas-switch stops inserted, then |
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2392 // we should pay attention to the gas when starting to ascent, before |
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2393 // the first stop... |
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2394 if( read_custom_function(55) == 0 ) |
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2395 { |
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2396 overlay unsigned char j; |
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2397 for(j=0; j<NUM_GAS; ++j) |
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2398 { |
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2399 if( char_O_first_deco_depth < char_I_deco_gas_change[j] ) |
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2400 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
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2401 gas = j; |
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2402 } |
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2403 } |
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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2404 |
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2405 //---- Ascent usage ------------------------------------------------------ |
234
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2406 deepest_first = read_custom_function(54) == 0; |
511
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NEW NDL NDL faster/more precise simu (but no closed formula for trimix).
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2407 deco_usage = (float) read_custom_function(57); // In liter/minutes. |
222
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2408 |
224 | 2409 // Usage up to the first stop: |
2410 // - computed at MAX depth (easier, safer), | |
222
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2411 // - with an ascent speed of 10m/min. |
224 | 2412 // - with ascent litter / minutes. |
222
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2413 // - still using bottom gas: |
478
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2414 if( deco_usage > 0.0 ) |
265 | 2415 volumes[gas] |
2416 += (char_I_bottom_depth*0.1 + 1.0) // Depth -> bar | |
2417 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 // ascent time (min) | |
478
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2418 * deco_usage; // Consumption ( xxx / min @ 1 bar) |
222
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2419 |
338 | 2420 for(i=0; i<NUM_STOPS; ++i) |
222
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2421 { |
241 | 2422 overlay unsigned char j; |
234
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2423 overlay unsigned char depth, time, ascent; |
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2424 |
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2425 // Manage stops in reverse order (CF#54) |
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2426 if( deepest_first ) |
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2427 { |
241 | 2428 time = char_O_deco_time[i]; |
234
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2429 if( time == 0 ) break; // End of table: done. |
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2430 |
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2431 ascent = depth = char_O_deco_depth[i] & 0x7F; |
234
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2432 if( i < 31 ) |
288
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2433 ascent -= char_O_deco_depth[i+1] & 0x7F; |
234
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2434 } |
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2435 else |
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2436 { |
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2437 time = char_O_deco_time[31-i]; |
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2438 if( time == 0 ) continue; // not yet: still searh table. |
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2439 |
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2440 ascent = depth = char_O_deco_depth[31-i] & 0x7F; |
234
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2441 if( i < 31 ) |
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2442 ascent -= char_O_deco_depth[30-i] & 0x7F; |
234
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2443 } |
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|
2444 |
222
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2445 // Gas switch depth ? |
338 | 2446 for(j=0; j<NUM_GAS; ++j) |
222
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2447 { |
234
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2448 if( depth <= char_I_deco_gas_change[j] ) |
241 | 2449 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
224 | 2450 gas = j; |
222
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2451 } |
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|
2452 |
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2453 // usage during stop: |
224 | 2454 // Note: because first gas is not in there, increment gas+1 |
478
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2455 if( deco_usage > 0.0 ) |
265 | 2456 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
2457 * time // in minutes. | |
478
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2458 * deco_usage // in xxx / min @ 1bar. |
265 | 2459 // Plus usage during ascent to the next stop, at 10m/min. |
2460 + (depth*0.1 + 1.0) | |
275
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2461 * ascent*0.1 // metre --> min |
478
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2462 * deco_usage; |
265 | 2463 else |
2464 volumes[gas] = 65535.0; | |
222
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2465 } |
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2466 |
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|
2467 //---- convert results for the ASM interface ----------------------------- |
338 | 2468 for(i=0; i<NUM_GAS; ++i) |
441
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|
2469 if( volumes[i] > 65534.0 ) |
224 | 2470 int_O_gas_volumes[i] = 65535; |
222
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|
2471 else |
441
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|
2472 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); |
116 | 2473 } |
2474 | |
167 | 2475 ////////////////////////////////////////////////////////////////////////////// |
2476 | |
116 | 2477 void deco_push_tissues_to_vault(void) |
2478 { | |
167 | 2479 overlay unsigned char x; |
122
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diff
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|
2480 RESET_C_STACK |
167 | 2481 |
116 | 2482 cns_vault = CNS_fraction; |
339 | 2483 for (x=0;x<NUM_COMP;x++) |
2484 { | |
2485 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
2486 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
2487 } | |
116 | 2488 } |
167 | 2489 |
116 | 2490 void deco_pull_tissues_from_vault(void) |
2491 { | |
167 | 2492 overlay unsigned char x; |
122
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|
2493 RESET_C_STACK |
167 | 2494 |
339 | 2495 for (x=0; x<NUM_COMP; x++) |
2496 { | |
2497 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
2498 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
2499 } | |
292 | 2500 |
2501 // Restore both CNS variable, too. | |
2502 CNS_fraction = cns_vault; | |
514 | 2503 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
116 | 2504 } |
2505 | |
167 | 2506 ////////////////////////////////////////////////////////////////////////////// |
2507 // | |
184 | 2508 #ifndef CROSS_COMPILE |
2509 void main() {} | |
2510 #endif |