Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 678:3c0af4480866
2.59 release
author | heinrichsweikamp |
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date | Sun, 06 Jan 2013 17:43:36 +0100 |
parents | 75dc320f4681 |
children | 6e456a6398e0 |
rev | line source |
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116 | 1 // ************************************************************** |
2 // p2_deco.c | |
3 // | |
4 // Created on: 12.05.2009 | |
5 // Author: chsw | |
6 // | |
7 // ************************************************************** | |
8 | |
9 ////////////////////////////////////////////////////////////////////////////// | |
10 // OSTC - diving computer code | |
532 | 11 // Copyright (C) 2011 HeinrichsWeikamp GbR |
116 | 12 // |
13 // This program is free software: you can redistribute it and/or modify | |
14 // it under the terms of the GNU General Public License as published by | |
15 // the Free Software Foundation, either version 3 of the License, or | |
16 // (at your option) any later version. | |
17 // | |
18 // This program is distributed in the hope that it will be useful, | |
19 // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 // GNU General Public License for more details. | |
22 // | |
23 // You should have received a copy of the GNU General Public License | |
24 // along with this program. If not, see <http://www.gnu.org/licenses/>. | |
25 // | |
26 ////////////////////////////////////////////////////////////////////////////// | |
27 | |
28 // ***************************** | |
29 // ** I N T R O D U C T I O N ** | |
30 // ***************************** | |
31 // | |
32 // OSTC | |
33 // | |
34 // code: | |
35 // p2_deco_main_c_v101.c | |
36 // part2 of the OSTC code | |
37 // code with constant O2 partial pressure routines | |
38 // under construction !! | |
39 // | |
40 // summary: | |
41 // decompression routines | |
42 // for the OSTC experimental project | |
43 // written by Christian Weikamp | |
44 // last revision __________ | |
45 // comments added _________ | |
46 // | |
47 // additional files: | |
48 // p2_tables_v100.romdata (other files) | |
49 // 18f4685_ostc_v100.lkr (linker script) | |
50 // | |
51 // history: | |
52 // 01/03/08 v100: first release candidate | |
53 // 03/13/08 v101: start of programming ppO2 code | |
54 // 03/13/25 v101a: backup of interrim version with ppO2 calculation | |
55 // 03/13/25 v101: open circuit gas change during deco | |
56 // 03/13/25 v101: CNS_fraction calculation | |
57 // 03/13/26 v101: optimization of tissue calc routines | |
58 // 07/xx/08 v102a: debug of bottom time routine | |
59 // 09/xx/08 v102d: Gradient Factor Model implemenation | |
60 // 10/10/08 v104: renamed to build v103 for v118 stable | |
171 | 61 // 10/14/08 v104: integration of char_I_depth_last_deco for Gradient Model |
116 | 62 // 03/31/09 v107: integration of FONT Incon24 |
63 // 05/23/10 v109: 5 gas changes & 1 min timer | |
64 // 07/13/10 v110: cns vault added | |
65 // 12/25/10 v110: split in three files (deco.c, main.c, definitions.h) | |
163 | 66 // 2011/01/20: [jDG] Create a common file included in ASM and C code. |
167 | 67 // 2011/01/23: [jDG] Added read_custom_function(). |
203 | 68 // 2011/01/24: [jDG] Make ascenttime an short. No more overflow! |
169
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69 // 2011/01/25: [jDG] Fusion deco array for both models. |
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70 // 2011/01/25: [jDG] Use CF(54) to reverse deco order. |
193 | 71 // 2011/02/11: [jDG] Reworked gradient-factor implementation. |
197 | 72 // 2011/02/13: [jDG] CF55 for additional gas switch delay in decoplan. |
275
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73 // 2011/02/15: [jDG] Fixed inconsistencies introduced by gas switch delays. |
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74 // 2011/03/21: [jDG] Added gas consumption (CF56 & CF57) evaluation for OCR mode. |
293
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75 // 2011/04/10: [jDG] Use timer TMR3 to limit loops in calc_hauptroutine_calc_deco(). |
275
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76 // 2011/04/15: [jDG] Store low_depth in 32bits (w/o rounding), for a better stability. |
293
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77 // 2011/04/25: [jDG] Added 1mn mode for CNS calculation, to allow it for decoplanning. |
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78 // 2011/04/27: [jDG] Fixed char_O_gradient_factor calculation when model uses gradient-factor. |
334
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79 // 2011/05/02: [jDG] Added "Future TTS" function (CF58). |
338 | 80 // 2011/05/17: [jDG] Various cleanups. |
511
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81 // 2011/08/08: [jDG] Computes CNS during deco planning ascent. |
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82 // 2011/11/24: [jDG] Slightly faster and better NDL computation. |
562 | 83 // 2011/12/17: [mH] Remove of the useless debug stuff |
561 | 84 // 2012/02/24: [jDG] Remove missed stop bug. |
562 | 85 // 2012/02/25: [jDG] Looking for a more stable LOW grad factor reference. |
646 | 86 // 2012/09/10: [mH] Fill char_O_deco_time_for_log for logbook write |
87 // 2012/10/05: [jDG] Better deco_gas_volumes accuracy (average depth, switch between stop). | |
116 | 88 // |
167 | 89 // TODO: |
90 // + Allow to abort MD2 calculation (have to restart next time). | |
91 // | |
92 // Literature: | |
200 | 93 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
116 | 94 // Schr"oder, Kai & Reith, Steffen; 2000; S"attigungsvorg"ange beim Tauchen, das Modell ZH-L16, Funktionsweise von Tauchcomputern; http://www.achim-und-kai.de/kai/tausim/saett_faq |
95 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
96 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
97 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
98 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
167 | 99 // |
100 // | |
116 | 101 |
102 // ********************* | |
103 // ** I N C L U D E S ** | |
104 // ********************* | |
105 #include <math.h> | |
167 | 106 |
192 | 107 // *********************************************** |
108 // ** V A R I A B L E S D E F I N I T I O N S ** | |
109 // *********************************************** | |
110 | |
111 #include "p2_definitions.h" | |
275
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112 #define TEST_MAIN |
509 | 113 #include "../OSTC_code_asm_part1/shared_definitions.h" |
192 | 114 |
200 | 115 // Water vapour partial pressure in the lumb. |
527 | 116 #define ppWater 0.0627 |
317 | 117 #define METER_TO_BAR 0.09985 |
118 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
200 | 119 |
491
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120 // Surface security factor |
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121 #define SURFACE_DESAT_FACTOR 0.7042 |
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122 |
167 | 123 // ************************* |
124 // ** P R O T O T Y P E S ** | |
125 // ************************* | |
126 | |
127 static void calc_hauptroutine(void); | |
128 static void calc_nullzeit(void); | |
129 | |
192 | 130 static void calc_tissue(PARAMETER unsigned char period); |
258 | 131 static void calc_limit(void); |
192 | 132 |
167 | 133 static void clear_tissue(void); |
134 static void calc_ascenttime(void); | |
135 static void update_startvalues(void); | |
169
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136 static void clear_deco_table(void); |
471 | 137 static unsigned char update_deco_table(void); |
192 | 138 |
139 static void sim_tissue(PARAMETER unsigned char period); | |
140 static void sim_limit(PARAMETER float GF_current); | |
312
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141 static void sim_extra_time(void); |
368 | 142 static void calc_dive_interval(void); |
312
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143 |
167 | 144 static void calc_gradient_factor(void); |
145 static void calc_wo_deco_step_1_min(void); | |
146 | |
147 static void calc_hauptroutine_data_input(void); | |
148 static void calc_hauptroutine_update_tissues(void); | |
149 static void calc_hauptroutine_calc_deco(void); | |
169
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150 static void sim_ascent_to_first_stop(void); |
167 | 151 |
241 | 152 static unsigned char gas_switch_deepest(void); |
153 static void gas_switch_set(void); | |
217 | 154 |
241 | 155 static unsigned char calc_nextdecodepth(void); |
116 | 156 |
200 | 157 //---- Bank 4 parameters ----------------------------------------------------- |
601
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158 #ifndef UNIX |
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159 # pragma udata bank4=0x400 |
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160 #endif |
116 | 161 |
162 static float GF_low; | |
163 static float GF_high; | |
164 static float GF_delta; | |
192 | 165 static float locked_GF_step; // GF_delta / low_depth |
166 | |
167 static unsigned char temp_depth_limit; | |
562 | 168 static unsigned char low_depth; // Depth of deepest stop |
171 | 169 |
192 | 170 // Simulation context: used to predict ascent. |
171 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
172 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
116 | 173 |
192 | 174 // Real context: what we are doing now. |
175 static float calc_lead_tissue_limit; // | |
116 | 176 |
338 | 177 static unsigned char internal_deco_time[NUM_STOPS]; |
178 static unsigned char internal_deco_depth[NUM_STOPS]; | |
116 | 179 |
180 static float cns_vault; | |
339 | 181 static float pres_tissue_N2_vault[NUM_COMP]; |
182 static float pres_tissue_He_vault[NUM_COMP]; | |
116 | 183 |
163 | 184 //---- Bank 5 parameters ----------------------------------------------------- |
601
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185 #ifndef UNIX |
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186 # pragma udata bank5=0x500 |
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187 #endif |
163 | 188 |
167 | 189 static unsigned char ci; |
116 | 190 static float pres_respiration; |
191 static float pres_surface; | |
192 static float temp_deco; | |
236 | 193 static float ppN2; |
200 | 194 static float ppHe; |
116 | 195 static float temp_tissue; |
200 | 196 static float N2_ratio; // Breathed gas nitrogen ratio. |
197 static float He_ratio; // Breathed gas helium ratio. | |
198 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
199 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
200 static float var_He_a; // Bühlmann a, for current He tissue. | |
201 static float var_He_b; // Bühlmann b, for current He tissue. | |
202 static float var_N2_e; // Exposition, for current N2 tissue. | |
203 static float var_He_e; // Exposition, for current He tissue. | |
509 | 204 static float var_N2_ht; // Half-time for current N2 tissue. |
205 static float var_He_ht; // Half-time for current N2 tissue. | |
116 | 206 |
338 | 207 static float pres_diluent; // new in v.101 |
208 static float const_ppO2; // new in v.101 | |
116 | 209 |
241 | 210 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
211 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
203 | 212 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
213 static unsigned short sim_dive_mins; // Simulated dive time. | |
200 | 214 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
215 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
216 static float CNS_fraction; // new in v.101 | |
217 static float float_saturation_multiplier; // new in v.101 | |
218 static float float_desaturation_multiplier; // new in v.101 | |
338 | 219 static float float_deco_distance; // new in v.101 |
220 static char flag_in_divemode; // new in v.108 | |
167 | 221 |
338 | 222 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
167 | 223 |
163 | 224 //---- Bank 6 parameters ----------------------------------------------------- |
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225 #ifndef UNIX |
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226 # pragma udata bank6=0x600 |
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227 #endif |
116 | 228 |
339 | 229 float pres_tissue_N2[NUM_COMP]; |
230 float pres_tissue_He[NUM_COMP]; | |
509 | 231 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. |
232 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
116 | 233 |
163 | 234 //---- Bank 7 parameters ----------------------------------------------------- |
601
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235 #ifndef UNIX |
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236 # pragma udata bank7=0x700 |
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237 #endif |
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238 |
509 | 239 // EMPTY ... |
116 | 240 |
163 | 241 //---- Bank 8 parameters ----------------------------------------------------- |
601
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242 #ifndef UNIX |
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243 # pragma udata bank8=0x800 |
163 | 244 |
601
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245 static char md_pi_subst[256]; |
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246 # define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
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247 |
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248 #endif |
116 | 249 |
163 | 250 //---- Bank 9 parameters ----------------------------------------------------- |
601
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251 #ifndef UNIX |
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252 # pragma udata bank9=0x900 |
116 | 253 |
601
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254 static char md_state[48]; // DONT MOVE : has to be at the beginning of bank 9 for the asm code!!! |
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255 #endif |
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256 |
116 | 257 |
167 | 258 ////////////////////////////////////////////////////////////////////////////// |
259 ////////////////////////////////////////////////////////////////////////////// | |
260 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
261 ////////////////////////////////////////////////////////////////////////////// | |
262 ////////////////////////////////////////////////////////////////////////////// | |
263 // | |
264 // End of PROM code is 17F00, So push tables on PROM top... | |
265 // | |
601
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266 #ifndef UNIX |
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267 # pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. |
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268 #endif |
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269 |
167 | 270 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) |
116 | 271 |
167 | 272 // Magic table to compute the MD2 HASH |
273 // | |
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274 #ifndef UNIX |
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275 # pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... |
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276 rom const rom unsigned short md_pi[] = |
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277 { |
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278 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 |
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279 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA |
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280 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 |
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281 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A |
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282 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 |
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283 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 |
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284 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 |
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285 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 |
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286 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 |
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287 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F |
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288 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 |
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289 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 |
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290 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A |
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291 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 |
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292 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A |
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293 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 |
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294 }; |
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295 #endif |
116 | 296 |
167 | 297 ////////////////////////////////////////////////////////////////////////////// |
298 ////////////////////////////////////////////////////////////////////////////// | |
299 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
300 ////////////////////////////////////////////////////////////////////////////// | |
301 ////////////////////////////////////////////////////////////////////////////// | |
302 // | |
116 | 303 // all new in v.102 |
304 // moved from 0x0D000 to 0x0C000 in v.108 | |
601
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305 #ifndef UNIX |
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306 # pragma code p2_deco = 0x0C000 |
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307 #endif |
116 | 308 |
167 | 309 ////////////////////////////////////////////////////////////////////////////// |
310 ////////////////////////////////////////////////////////////////////////////// | |
311 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
312 ////////////////////////////////////////////////////////////////////////////// | |
313 ////////////////////////////////////////////////////////////////////////////// | |
314 | |
235 | 315 ////////////////////////////////////////////////////////////////////////////// |
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316 // Bump to blue-screen when an assert is wrong |
235 | 317 #ifdef __DEBUG |
318 void assert_failed(PARAMETER short int line) | |
319 { | |
320 extern void PLED_resetdebugger(void); | |
321 extern unsigned short temp10; | |
322 | |
257
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323 temp10 = line; // Show source line number as stack depth. |
235 | 324 PLED_resetdebugger(); |
325 } | |
326 #endif | |
257
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327 |
235 | 328 ////////////////////////////////////////////////////////////////////////////// |
329 // When calling C code from ASM context, the data stack pointer and | |
330 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
331 | |
332 #ifdef CROSS_COMPILE | |
333 # define RESET_C_STACK | |
334 #else | |
335 # ifdef __DEBUG | |
336 # define RESET_C_STACK fillDataStack(); | |
337 void fillDataStack(void) | |
338 { | |
339 _asm | |
340 LFSR 1,C_STACK | |
341 MOVLW 0xCC | |
342 loop: MOVWF POSTINC1,0 | |
343 TSTFSZ FSR1L,0 | |
344 BRA loop | |
345 | |
346 LFSR 1,C_STACK | |
347 LFSR 2,C_STACK | |
348 _endasm | |
349 } | |
350 # else | |
351 # define RESET_C_STACK \ | |
352 _asm \ | |
353 LFSR 1, C_STACK \ | |
354 LFSR 2, C_STACK \ | |
355 _endasm | |
356 # endif | |
357 #endif | |
358 | |
359 ////////////////////////////////////////////////////////////////////////////// | |
257
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360 // Read CF values from the C code. |
235 | 361 |
488 | 362 #ifdef CROSS_COMPILE |
363 // Full description of the OSTC EEPROM map, including CF values. | |
364 # include "OSTC_eeprom.h" | |
365 #endif | |
366 | |
203 | 367 static short read_custom_function(PARAMETER unsigned char cf) |
167 | 368 { |
184 | 369 #ifdef CROSS_COMPILE |
564 | 370 return (cf & 32) ? eeprom.bank1_CF[cf-32].value.lo |
371 : eeprom.bank0_CF[cf ].value.lo; | |
184 | 372 #else |
167 | 373 extern unsigned char hi, lo; |
374 extern void getcustom15(); | |
375 _asm | |
376 movff cf,WREG | |
377 call getcustom15,0 | |
378 movff lo,PRODL | |
379 movff hi,PRODH | |
380 _endasm | |
184 | 381 #endif |
167 | 382 } |
383 | |
384 ////////////////////////////////////////////////////////////////////////////// | |
257
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385 // Fast subroutine to read RTC timer 3. |
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386 // Note: result is in 1/32 of msecs. |
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387 static unsigned short tmr3(void) |
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388 { |
261 | 389 #ifndef CROSS_COMPILE |
257
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390 _asm |
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391 movff 0xfb2,PRODL // TMR3L |
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392 movff 0xfb3,PRODH // TMR3H |
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393 _endasm // result in PRODH:PRODL. |
261 | 394 #else |
395 return 0; | |
396 #endif | |
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397 } |
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398 |
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399 ////////////////////////////////////////////////////////////////////////////// |
258 | 400 // read buhlmann tables A and B for compatriment ci |
401 // | |
402 static void read_buhlmann_coefficients(void) | |
165 | 403 { |
184 | 404 #ifndef CROSS_COMPILE |
167 | 405 // Note: we don't use far rom pointer, because the |
338 | 406 // 24 bits is too complex, hence we have to set |
167 | 407 // the UPPER page ourself... |
408 // --> Set zero if tables are moved to lower pages ! | |
409 _asm | |
410 movlw 1 | |
411 movwf TBLPTRU,0 | |
412 _endasm | |
184 | 413 #endif |
258 | 414 |
564 | 415 assert( ci < NUM_COMP ); |
338 | 416 |
417 // Use an interleaved array (AoS) to access coefficients with a | |
418 // single addressing. | |
419 { | |
420 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
421 var_N2_a = *ptr++; | |
422 var_N2_b = *ptr++; | |
423 var_He_a = *ptr++; | |
424 var_He_b = *ptr++; | |
425 } | |
258 | 426 } |
427 | |
428 ////////////////////////////////////////////////////////////////////////////// | |
429 // read buhlmann tables for compatriment ci | |
430 // If period == 0 : 2sec interval | |
431 // 1 : 1 min interval | |
432 // 2 : 10 min interval. | |
433 static void read_buhlmann_times(PARAMETER char period) | |
434 { | |
435 #ifndef CROSS_COMPILE | |
436 // Note: we don't use far rom pointer, because the | |
437 // 24 bits is to complex, hence we have to set | |
438 // the UPPER page ourself... | |
439 // --> Set zero if tables are moved to lower pages ! | |
440 _asm | |
441 movlw 1 | |
442 movwf TBLPTRU,0 | |
443 _endasm | |
444 #endif | |
338 | 445 |
564 | 446 assert( ci < NUM_COMP ); |
258 | 447 |
165 | 448 // Integration intervals. |
167 | 449 switch(period) |
165 | 450 { |
451 case 0: //---- 2 sec ----------------------------------------------------- | |
338 | 452 { |
453 overlay rom const float* ptr = &e2secs[2*ci]; | |
454 var_N2_e = *ptr++; | |
455 var_He_e = *ptr++; | |
456 } | |
165 | 457 break; |
458 | |
459 case 1: //---- 1 min ----------------------------------------------------- | |
338 | 460 { |
461 overlay rom const float* ptr = &e1min[2*ci]; | |
462 var_N2_e = *ptr++; | |
463 var_He_e = *ptr++; | |
464 } | |
165 | 465 break; |
466 | |
467 case 2: //---- 10 min ---------------------------------------------------- | |
338 | 468 { |
469 overlay rom const float* ptr = &e10min[2*ci]; | |
470 var_N2_e = *ptr++; | |
471 var_He_e = *ptr++; | |
472 } | |
165 | 473 break; |
197 | 474 |
475 default: | |
527 | 476 assert(0); // Never go there... |
165 | 477 } |
478 } | |
479 | |
480 ////////////////////////////////////////////////////////////////////////////// | |
509 | 481 // read buhlmann tables for compatriment ci |
482 // | |
483 static void read_buhlmann_ht(void) | |
484 { | |
485 | |
486 #ifndef CROSS_COMPILE | |
487 // Note: we don't use far rom pointer, because the | |
488 // 24 bits is to complex, hence we have to set | |
489 // the UPPER page ourself... | |
490 // --> Set zero if tables are moved to lower pages ! | |
491 _asm | |
492 movlw 1 | |
493 movwf TBLPTRU,0 | |
494 _endasm | |
495 #endif | |
496 | |
564 | 497 assert( ci < NUM_COMP ); |
509 | 498 { |
499 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
500 var_N2_ht = *ptr++; | |
501 var_He_ht = *ptr++; | |
502 } | |
503 | |
504 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
505 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
506 } | |
507 | |
508 ////////////////////////////////////////////////////////////////////////////// | |
340
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509 // calc_nextdecodepth |
165 | 510 // |
116 | 511 // new in v.102 |
165 | 512 // |
116 | 513 // INPUT, changing during dive: |
509 | 514 // temp_deco |
192 | 515 // low_depth |
167 | 516 // |
116 | 517 // INPUT, fixed during dive: |
167 | 518 // pres_surface |
519 // GF_delta | |
520 // GF_high | |
521 // GF_low | |
171 | 522 // char_I_depth_last_deco |
167 | 523 // float_deco_distance |
524 // | |
241 | 525 // RETURN TRUE iff a stop is needed. |
526 // | |
116 | 527 // OUTPUT |
171 | 528 // locked_GF_step |
167 | 529 // temp_depth_limt |
192 | 530 // low_depth |
167 | 531 // |
241 | 532 static unsigned char calc_nextdecodepth(void) |
167 | 533 { |
241 | 534 //--- Max ascent speed --------------------------------------------------- |
535 // Recompute leading gas limit, at current depth: | |
317 | 536 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
241 | 537 |
538 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
302 | 539 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
241 | 540 |
541 // Do we need to stop at current depth ? | |
542 overlay unsigned char need_stop = 0; | |
543 | |
544 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
545 | |
212 | 546 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
509 | 547 if( char_I_deco_model != 0 ) |
116 | 548 { |
562 | 549 overlay unsigned char first_stop = 0; |
550 overlay float p; | |
551 | |
567 | 552 sim_limit( GF_low ); |
562 | 553 p = sim_lead_tissue_limit - pres_surface; |
554 if( p <= 0.0f ) | |
555 goto no_deco_stop; // We can surface directly... | |
512
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556 |
562 | 557 p *= BAR_TO_METER; |
558 if( p < min_depth ) | |
559 goto no_deco_stop; // First stop is higher than 1' ascent. | |
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560 |
562 | 561 first_stop = 3 * (short)(0.99999 + p*0.333333); |
562 assert( first_stop < 128 ); | |
563 | |
564 // Apply correction for the shallowest stop. | |
565 if( first_stop == 3 ) // new in v104 | |
566 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
171 | 567 |
562 | 568 // Store the deepest point needing a deco stop as the LOW reference for GF. |
569 // NOTE: following stops will be validated using this LOW-HIGH gf scale, | |
570 // so if we want to keep coherency, we should not validate this stop | |
568 | 571 // yet, but apply the search to it, as for all the following stops afterward. |
562 | 572 if( first_stop > low_depth ) |
573 { | |
574 low_depth = first_stop; | |
568 | 575 locked_GF_step = GF_delta / first_stop; |
562 | 576 } |
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577 |
562 | 578 // We have a stop candidate. |
579 // But maybe ascending to the next stop will diminish the constraint, | |
580 // because the GF might decrease more than the preassure gradient... | |
581 while(first_stop > 0) | |
582 { | |
583 overlay unsigned char next_stop; // Next depth (0..90m) | |
584 overlay float pres_stop; // Next pressure (bar) | |
171 | 585 |
562 | 586 // Check max speed, or reaching surface. |
587 if( first_stop <= min_depth ) | |
588 goto no_deco_stop; | |
171 | 589 |
562 | 590 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
591 next_stop = 0; | |
592 else if( first_stop == 6 ) | |
593 next_stop = char_I_depth_last_deco; | |
594 else | |
595 next_stop = first_stop - 3; // Index of next (upper) stop. | |
596 | |
597 // Just a check we are indeed above LOW ref. | |
598 assert( next_stop < low_depth ); | |
241 | 599 |
562 | 600 // Total preassure at the new stop candidate: |
601 pres_stop = next_stop * METER_TO_BAR | |
602 + pres_surface; | |
167 | 603 |
562 | 604 // Keep GF_low until a first stop depth is found: |
605 sim_limit( GF_high - next_stop * locked_GF_step ); | |
192 | 606 |
562 | 607 // Check upper limit (lowest pressure tolerated): |
608 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
609 goto deco_stop_found; | |
610 | |
611 // Else, validate that stop and loop... | |
612 first_stop = next_stop; | |
613 } | |
614 assert( first_stop == 0 ); | |
171 | 615 |
562 | 616 no_deco_stop: |
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617 temp_depth_limit = min_depth; |
562 | 618 goto done; |
212 | 619 |
562 | 620 // next stop is the last validated depth found, aka first_stop |
621 deco_stop_found: | |
622 need_stop = 1; // Hit. | |
623 temp_depth_limit = first_stop; // Stop depth, in meter. | |
624 | |
625 done: | |
626 ; | |
116 | 627 } |
167 | 628 else //---- ZH-L16 model ------------------------------------------------- |
116 | 629 { |
192 | 630 overlay float pres_gradient; |
631 | |
632 // Original model | |
116 | 633 // optimized in v.101 |
171 | 634 // char_I_depth_last_deco included in v.101 |
116 | 635 |
192 | 636 // Compute sim_lead_tissue_limit too, but just once. |
637 sim_limit(1.0); | |
638 | |
639 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
167 | 640 if (pres_gradient >= 0) |
116 | 641 { |
317 | 642 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
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643 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
241 | 644 need_stop = 1; // Hit. |
645 | |
646 // Implement last stop at 4m/5m/6m... | |
647 if( temp_depth_limit == 3 ) | |
648 temp_depth_limit = char_I_depth_last_deco; | |
171 | 649 } |
116 | 650 else |
241 | 651 temp_depth_limit = 0; |
171 | 652 } |
212 | 653 |
217 | 654 //---- Check gas change -------------------------------------------------- |
241 | 655 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
656 | |
657 return need_stop; | |
167 | 658 } |
116 | 659 |
167 | 660 ////////////////////////////////////////////////////////////////////////////// |
169
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661 // copy_deco_table |
167 | 662 // |
169
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663 // Buffer the stops, once computed, so we can continue to display them |
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664 // while computing the next set. |
167 | 665 // |
169
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666 static void copy_deco_table(void) |
116 | 667 { |
169
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668 // Copy depth of the first (deepest) stop, because when reversing |
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669 // order, it will be hard to find... |
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670 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
169
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671 char_O_first_deco_time = internal_deco_time [0]; |
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672 |
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673 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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674 { |
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675 overlay unsigned char x, y; |
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676 |
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677 //---- First: search the first non-null depth |
339 | 678 for(x=(NUM_STOPS-1); x != 0; --x) |
169
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679 if( internal_deco_depth[x] != 0 ) break; |
116 | 680 |
169
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681 //---- Second: copy to output table (in reverse order) |
338 | 682 for(y=0; y<NUM_STOPS; y++, --x) |
169
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683 { |
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684 char_O_deco_depth[y] = internal_deco_depth[x]; |
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685 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
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686 char_O_deco_time [y] = internal_deco_time [x]; |
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687 |
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688 // Stop only once the last transfer is done. |
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689 if( x == 0 ) break; |
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690 } |
116 | 691 |
169
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692 //---- Third: fill table end with null |
339 | 693 for(y++; y<NUM_STOPS; y++) |
169
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694 { |
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695 char_O_deco_time [y] = 0; |
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696 char_O_deco_depth[y] = 0; |
630
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697 char_O_deco_time_for_log[y] = 0; |
169
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698 } |
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699 } |
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700 else //---- Straight copy ------------------------------------------------ |
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701 { |
630
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702 overlay unsigned char x, y; |
167 | 703 |
339 | 704 for(x=0; x<NUM_STOPS; x++) |
169
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705 { |
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706 char_O_deco_depth[x] = internal_deco_depth[x]; |
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707 char_O_deco_time [x] = internal_deco_time [x]; |
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708 } |
630
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709 |
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710 //Now fill the char_O_deco_time_for_log array |
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711 //---- First: search the first non-null depth |
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712 for(x=(NUM_STOPS-1); x != 0; --x) |
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713 if( internal_deco_depth[x] != 0 ) break; |
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714 |
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715 //---- Second: copy to output table (in reverse order) |
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716 for(y=0; y<NUM_STOPS; y++, --x) |
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717 { |
633
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718 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
630
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719 |
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720 // Stop only once the last transfer is done. |
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721 if( x == 0 ) break; |
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722 } |
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723 |
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724 //---- Third: fill table end with null |
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725 for(y++; y<NUM_STOPS; y++) |
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726 { |
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727 char_O_deco_time_for_log [y] = 0; |
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728 } |
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729 |
169
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730 } |
167 | 731 } |
116 | 732 |
167 | 733 ////////////////////////////////////////////////////////////////////////////// |
116 | 734 // temp_tissue_safety // |
167 | 735 // |
116 | 736 // outsourced in v.102 |
167 | 737 // |
738 // Apply safety factors for brand ZH-L16 model. | |
739 // | |
740 static void temp_tissue_safety(void) | |
116 | 741 { |
197 | 742 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
743 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
744 | |
167 | 745 if( char_I_deco_model == 0 ) |
116 | 746 { |
491
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747 if( temp_tissue < 0.0 ) |
126 | 748 temp_tissue *= float_desaturation_multiplier; |
116 | 749 else |
126 | 750 temp_tissue *= float_saturation_multiplier; |
116 | 751 } |
167 | 752 } |
116 | 753 |
167 | 754 ////////////////////////////////////////////////////////////////////////////// |
755 ////////////////////////////////////////////////////////////////////////////// | |
116 | 756 // ** THE JUMP-IN CODE ** |
757 // ** for the asm code ** | |
167 | 758 ////////////////////////////////////////////////////////////////////////////// |
759 ////////////////////////////////////////////////////////////////////////////// | |
122
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760 |
167 | 761 ////////////////////////////////////////////////////////////////////////////// |
169
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762 // Called every 2 seconds during diving. |
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763 // update tissues every time. |
184 | 764 // |
169
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765 // Every 6 seconds (or slower when TTS > 16): |
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766 // - update deco table (char_O_deco_time/depth) with new values. |
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767 // - update ascent time, |
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768 // - set status to zero (so we can check there is new results). |
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769 // |
116 | 770 void deco_calc_hauptroutine(void) |
771 { | |
122
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772 RESET_C_STACK |
116 | 773 calc_hauptroutine(); |
774 int_O_desaturation_time = 65535; | |
775 } | |
776 | |
167 | 777 ////////////////////////////////////////////////////////////////////////////// |
184 | 778 // Reset decompression model: |
779 // + Set all tissues to equilibrium with Air at ambient pressure. | |
780 // + Reset last stop to 0m | |
781 // + Reset all model output. | |
116 | 782 void deco_clear_tissue(void) |
783 { | |
122
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784 RESET_C_STACK |
116 | 785 clear_tissue(); |
786 } | |
787 | |
167 | 788 ////////////////////////////////////////////////////////////////////////////// |
278 | 789 // Called every 1 min during decoplanning. |
790 // Update tissues for 1 min. | |
791 // | |
792 void deco_calc_tissue(void) | |
793 { | |
794 RESET_C_STACK | |
795 calc_hauptroutine_update_tissues(); | |
796 } | |
797 | |
798 ////////////////////////////////////////////////////////////////////////////// | |
167 | 799 |
116 | 800 void deco_calc_wo_deco_step_1_min(void) |
801 { | |
122
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802 RESET_C_STACK |
116 | 803 calc_wo_deco_step_1_min(); |
804 deco_calc_desaturation_time(); | |
805 } | |
806 | |
167 | 807 ////////////////////////////////////////////////////////////////////////////// |
808 | |
368 | 809 void deco_calc_dive_interval(void) |
810 { | |
811 RESET_C_STACK | |
812 calc_dive_interval(); | |
813 } | |
814 | |
241 | 815 ////////////////////////////////////////////////////////////////////////////// |
816 // Find current gas in the list (if any). | |
817 // | |
513 | 818 // Input: char_I_current_gas = 1..6 |
241 | 819 // |
513 | 820 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. |
241 | 821 // |
822 static void gas_switch_find_current(void) | |
823 { | |
513 | 824 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
247
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825 |
388 | 826 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 |
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827 { |
388 | 828 sim_gas_last_used = char_I_current_gas; |
829 | |
830 // Note: if current is first gas, we must find it, but not set | |
831 // last depth change to surface. | |
832 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
833 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
241 | 834 } |
388 | 835 else |
836 sim_gas_last_used = 0; // Gas 6 = manual set | |
241 | 837 } |
838 | |
167 | 839 ////////////////////////////////////////////////////////////////////////////// |
217 | 840 // Find deepest available gas. |
201 | 841 // |
241 | 842 // Input: temp_depth_limit, |
843 // deco_gas_change[] | |
844 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
212 | 845 // |
241 | 846 // RETURNS TRUE if a stop is needed for gas switch. |
847 // | |
848 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
212 | 849 // |
241 | 850 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
851 // are null), or during the ascent to make sure we are not passing a | |
852 // stop (in which case both can be already set). | |
853 // | |
854 static unsigned char gas_switch_deepest(void) | |
201 | 855 { |
241 | 856 overlay unsigned char switch_deco = 0, switch_last = 0; |
201 | 857 |
858 if (char_I_const_ppO2 == 0) | |
859 { | |
225 | 860 overlay unsigned char j; |
861 | |
241 | 862 // Loop over all enabled gas, to find the deepest one, |
340
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863 // above last used gas, but below temp_depth_limit. |
338 | 864 for(j=0; j<NUM_GAS; ++j) |
225 | 865 { |
241 | 866 // Gas not (yet) allowed ? Skip ! |
867 if( temp_depth_limit > deco_gas_change[j] ) | |
868 continue; | |
869 | |
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870 // Gas deeper (or equal) than the current one ? Skip ! |
241 | 871 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
872 continue; | |
873 | |
874 // First, or deeper ? | |
247
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875 if( switch_deco < deco_gas_change[j] ) |
241 | 876 { |
877 switch_deco = deco_gas_change[j]; | |
388 | 878 switch_last = j+1; // 1..5 |
241 | 879 } |
225 | 880 } |
201 | 881 } |
882 | |
203 | 883 // If there is a better gas available |
241 | 884 if( switch_deco ) |
201 | 885 { |
646 | 886 unsigned char delay; |
887 delay = read_custom_function(55); | |
555
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888 |
241 | 889 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
201 | 890 |
241 | 891 // Should restart gas-switch delay only when gas do changes... |
892 assert( sim_gas_delay <= sim_dive_mins ); | |
217 | 893 |
241 | 894 sim_gas_last_depth = switch_deco; |
895 sim_gas_last_used = switch_last; | |
555
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896 sim_gas_delay = delay |
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897 + sim_dive_mins; |
217 | 898 |
555
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899 if( delay ) |
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900 { |
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901 temp_depth_limit = switch_deco; |
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902 return 1; |
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903 } |
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904 else |
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905 return 0; |
217 | 906 } |
907 | |
241 | 908 sim_gas_delay = 0; |
909 return 0; | |
217 | 910 } |
911 | |
912 ////////////////////////////////////////////////////////////////////////////// | |
913 // Calculate gas switches | |
914 // | |
915 // | |
916 // Input: N2_ratio, He_ratio. | |
917 // sim_gas_last_used | |
918 // | |
919 // Output: calc_N2_ratio, calc_He_ratio | |
920 // | |
241 | 921 static void gas_switch_set(void) |
217 | 922 { |
564 | 923 assert( sim_gas_last_used <= NUM_GAS ); |
217 | 924 |
388 | 925 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. |
224 | 926 { |
927 calc_N2_ratio = N2_ratio; | |
928 calc_He_ratio = He_ratio; | |
929 } | |
930 else | |
931 { | |
932 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
933 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
217 | 934 } |
201 | 935 |
936 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
937 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
938 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
939 } | |
940 | |
941 ////////////////////////////////////////////////////////////////////////////// | |
942 // | |
212 | 943 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
509 | 944 // temp_deco : simulated respiration pressure |
276 | 945 // float_deco_distance : security factor. |
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946 // Water-vapor pressure inside limbs (ppWater). |
212 | 947 // |
236 | 948 // Output: ppN2, ppHe. |
212 | 949 // |
950 static void sim_alveolar_presures(void) | |
201 | 951 { |
212 | 952 overlay float deco_diluent = temp_deco; // new in v.101 |
953 | |
276 | 954 // Take deco offset into account, but not at surface. |
955 // Note: this should be done on ambiant pressure, hence before | |
956 // computing the diluant partial pressure... | |
957 if( deco_diluent > pres_surface ) | |
958 deco_diluent += float_deco_distance; | |
959 | |
212 | 960 //---- CCR mode : deco gas switch ? -------------------------------------- |
276 | 961 if( char_I_const_ppO2 != 0 ) |
201 | 962 { |
276 | 963 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
964 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
310
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965 // ppWater in the equations below: |
321 | 966 deco_diluent -= const_ppO2; |
276 | 967 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
212 | 968 |
969 if (deco_diluent > temp_deco) | |
970 deco_diluent = temp_deco; | |
201 | 971 } |
972 | |
310
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973 if( deco_diluent > ppWater ) |
201 | 974 { |
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975 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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976 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
201 | 977 } |
978 else | |
979 { | |
236 | 980 ppN2 = 0.0; |
201 | 981 ppHe = 0.0; |
982 } | |
236 | 983 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
201 | 984 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
985 } | |
986 | |
987 ////////////////////////////////////////////////////////////////////////////// | |
167 | 988 // clear_tissue |
989 // | |
165 | 990 // optimized in v.101 (var_N2_a) |
167 | 991 // |
992 // preload tissues with standard pressure for the given ambient pressure. | |
993 // Note: fixed N2_ratio for standard air. | |
201 | 994 // |
167 | 995 static void clear_tissue(void) |
116 | 996 { |
511
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997 overlay float p; |
116 | 998 flag_in_divemode = 0; |
999 | |
167 | 1000 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
1001 N2_ratio = 0.7902; | |
212 | 1002 pres_respiration = int_I_pres_respiration * 0.001; |
164 | 1003 |
511
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1004 p = N2_ratio * (pres_respiration - ppWater); |
338 | 1005 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1006 { |
511
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1007 // cycle through the 16 Bühlmann N2 tissues |
339 | 1008 pres_tissue_N2[ci] = p; |
197 | 1009 |
1010 // cycle through the 16 Bühlmann tissues for Helium | |
339 | 1011 pres_tissue_He[ci] = 0.0; |
511
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1012 } |
116 | 1013 |
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1014 clear_deco_table(); |
126 | 1015 char_O_deco_status = 0; |
1016 char_O_nullzeit = 0; | |
168 | 1017 int_O_ascenttime = 0; |
126 | 1018 char_O_gradient_factor = 0; |
1019 char_O_relative_gradient_GF = 0; | |
258 | 1020 |
1021 calc_lead_tissue_limit = 0.0; | |
1022 char_O_gtissue_no = 0; | |
167 | 1023 } |
116 | 1024 |
167 | 1025 ////////////////////////////////////////////////////////////////////////////// |
1026 // calc_hauptroutine | |
1027 // | |
1028 // this is the major code in dive mode calculates: | |
116 | 1029 // the tissues, |
167 | 1030 // the bottom time, |
1031 // and simulates the ascend with all deco stops. | |
171 | 1032 // |
1033 // The deco_state sequence is : | |
1034 // 3 (at surface) | |
1035 // +---> 0 : calc nullzeit | |
1036 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
1037 // | +-> 1 : simulate up to 16min of stops. | |
1038 // | +------< not finished | |
1039 // +--------< finish | |
1040 // | |
312
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1041 // Added steps 6,5 for @+5 calculation: |
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1042 // 6 = ascent to first stop (same as 2), except continue to 7 |
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1043 // 7 = same as 1, except loop to 7. |
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1044 // |
167 | 1045 static void calc_hauptroutine(void) |
116 | 1046 { |
241 | 1047 static unsigned char backup_gas_used = 0; |
1048 static unsigned char backup_gas_depth = 0; | |
217 | 1049 static unsigned char backup_gas_delay = 0; |
186 | 1050 |
116 | 1051 calc_hauptroutine_data_input(); |
1052 | |
1053 calc_hauptroutine_update_tissues(); | |
1054 calc_gradient_factor(); | |
1055 | |
167 | 1056 // toggle between calculation for nullzeit (bottom time), |
1057 // deco stops | |
1058 // and more deco stops (continue) | |
1059 switch( char_O_deco_status ) | |
116 | 1060 { |
186 | 1061 case 3: //---- At surface: start a new dive ------------------------------ |
1062 clear_deco_table(); | |
1063 copy_deco_table(); | |
200 | 1064 int_O_ascenttime = 0; // Reset DTR. |
323 | 1065 int_O_extra_ascenttime = 0; |
200 | 1066 char_O_nullzeit = 0; // Reset bottom time. |
278 | 1067 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
201 | 1068 |
217 | 1069 // Values that should be reset just once for the full real dive. |
1070 // This is used to record the lowest stop for the whole dive, | |
1071 // Including ACCROSS all simulated ascent. | |
567 | 1072 low_depth = 0; |
1073 locked_GF_step = 0.0; | |
217 | 1074 |
1075 // Reset gas switch history. | |
241 | 1076 backup_gas_used = sim_gas_last_used = 0; |
1077 backup_gas_depth = sim_gas_last_depth = 0; | |
217 | 1078 backup_gas_delay = sim_gas_delay = 0; |
203 | 1079 sim_dive_mins = 0; |
1080 break; | |
186 | 1081 |
167 | 1082 case 0: //---- bottom time ----------------------------------------------- |
312
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1083 default: |
509 | 1084 gas_switch_find_current(); // Lookup for current gas & time. |
1085 gas_switch_set(); // setup calc_ratio's | |
1086 | |
167 | 1087 calc_nullzeit(); |
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1088 if( char_O_nullzeit > 0 ) // Some NDL time left ? |
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1089 { |
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1090 char_O_deco_status = 0; // YES: recalc ndl next time. |
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1091 clear_deco_table(); // Also clear stops ! |
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1092 copy_deco_table(); |
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1093 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) |
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1094 } |
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1095 else |
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1096 char_O_deco_status = 2; // NO: calc ascent next time. |
186 | 1097 break; |
1098 | |
1099 case 2: //---- Simulate ascent to first stop ----------------------------- | |
312
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1100 case 6: // @+5min variation |
203 | 1101 // Check proposed gas at begin of ascent simulation |
247
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1102 sim_dive_mins = int_I_divemins; // Init current time. |
241 | 1103 |
532 | 1104 gas_switch_find_current(); // Lookup for current gas & time. |
1105 gas_switch_set(); // setup calc_ratio's | |
1106 | |
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1107 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1108 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
203 | 1109 backup_gas_delay = sim_gas_delay; |
186 | 1110 |
1111 sim_ascent_to_first_stop(); | |
201 | 1112 |
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1113 // Calc stops next time (deco or gas switch). |
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1114 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
167 | 1115 break; |
169
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1116 |
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1117 case 1: //---- Simulate stops -------------------------------------------- |
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1118 case 5: // @+5 variation. |
167 | 1119 calc_hauptroutine_calc_deco(); |
186 | 1120 |
1121 // If simulation is finished, restore the GF low reference, so that | |
1122 // next ascent simulation is done from the current depth: | |
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1123 if( (char_O_deco_status & 3) == 0 ) |
186 | 1124 { |
241 | 1125 sim_gas_last_used = backup_gas_used; |
1126 sim_gas_last_depth = backup_gas_depth; | |
247
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1127 sim_gas_delay = backup_gas_delay; |
186 | 1128 } |
167 | 1129 break; |
116 | 1130 } |
167 | 1131 |
116 | 1132 } |
1133 | |
167 | 1134 ////////////////////////////////////////////////////////////////////////////// |
1135 // calc_hauptroutine_data_input | |
1136 // | |
1137 // Reset all C-code dive parameters from their ASM-code values. | |
1138 // Detect gas change condition. | |
1139 // | |
116 | 1140 void calc_hauptroutine_data_input(void) |
1141 { | |
203 | 1142 overlay short int_temp; |
511
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1143 overlay unsigned char g; |
126 | 1144 |
197 | 1145 pres_respiration = int_I_pres_respiration * 0.001; |
1146 pres_surface = int_I_pres_surface * 0.001; | |
1147 N2_ratio = char_I_N2_ratio * 0.01; | |
1148 He_ratio = char_I_He_ratio * 0.01; | |
1149 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
116 | 1150 |
126 | 1151 // ____________________________________________________ |
1152 // | |
1153 // _____________ G A S _ C H A N G E S ________________ | |
1154 // ____________________________________________________ | |
1155 | |
212 | 1156 // Keep a margin of 150mbar = 1.50m |
1157 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
1158 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
126 | 1159 |
203 | 1160 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
511
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1161 for(g=0; g < NUM_GAS; ++g) |
126 | 1162 { |
511
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1163 deco_gas_change[g] = 0; |
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1164 if(char_I_deco_gas_change[g]) |
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1165 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) |
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1166 deco_gas_change[g] = char_I_deco_gas_change[g]; |
126 | 1167 } |
116 | 1168 |
197 | 1169 const_ppO2 = char_I_const_ppO2 * 0.01; |
1170 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
1171 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
1172 GF_low = char_I_GF_Low_percentage * 0.01; | |
1173 GF_high = char_I_GF_High_percentage * 0.01; | |
126 | 1174 GF_delta = GF_high - GF_low; |
116 | 1175 } |
1176 | |
167 | 1177 ////////////////////////////////////////////////////////////////////////////// |
171 | 1178 // |
1179 // | |
116 | 1180 void calc_hauptroutine_update_tissues(void) |
1181 { | |
197 | 1182 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
1183 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
1184 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
237 | 1185 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
197 | 1186 |
276 | 1187 pres_diluent = pres_respiration; |
307 | 1188 if( char_I_const_ppO2 != 0 ) // new in v.101 |
186 | 1189 { |
322 | 1190 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
1191 | |
276 | 1192 pres_diluent -= const_ppO2; // new in v.101 |
1193 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
321 | 1194 if( pres_diluent < 0.0 ) |
1195 pres_diluent = 0.0; | |
276 | 1196 if( pres_diluent > pres_respiration ) // new in v.101 |
1197 pres_diluent = pres_respiration; // new in v.101 | |
307 | 1198 |
321 | 1199 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
322 | 1200 |
326 | 1201 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
322 | 1202 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
1203 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
186 | 1204 } |
307 | 1205 |
310
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1206 if( pres_diluent > ppWater ) // new in v.101 |
116 | 1207 { |
307 | 1208 overlay float EAD, END; |
1209 | |
310
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1210 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1211 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
307 | 1212 |
1213 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
1214 // with plain air. | |
310
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1215 // ppN2 = 79% * (P_EAD - ppWater) |
307 | 1216 // EAD = (P_EAD - Psurface) * 10 |
310
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1217 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
317 | 1218 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
307 | 1219 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
317 | 1220 char_O_EAD = (unsigned char)(EAD + 0.5); |
307 | 1221 |
1222 // END : Equivalent Narcotic Dive. | |
1223 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
1224 // 0.23 btw). Hence the formula becomes: | |
310
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1225 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
317 | 1226 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
307 | 1227 // |
1228 // Source cited: | |
1229 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
1230 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
317 | 1231 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
307 | 1232 if( END < 0.0 || END > 245.5 ) END = 0.0; |
317 | 1233 char_O_END = (unsigned char)(END + 0.5); |
116 | 1234 } |
167 | 1235 else // new in v.101 |
116 | 1236 { |
236 | 1237 ppN2 = 0.0; // new in v.101 |
200 | 1238 ppHe = 0.0; // new in v.101 |
307 | 1239 char_O_EAD = char_O_END = 0; |
116 | 1240 } |
1241 | |
1242 if(!char_I_step_is_1min) | |
192 | 1243 calc_tissue(0); |
116 | 1244 else |
192 | 1245 calc_tissue(1); |
186 | 1246 |
192 | 1247 // Calc limit for surface, ie. GF_high. |
258 | 1248 calc_limit(); |
186 | 1249 |
203 | 1250 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
339 | 1251 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
171 | 1252 } |
1253 | |
116 | 1254 |
167 | 1255 ////////////////////////////////////////////////////////////////////////////// |
169
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1256 // Compute stops. |
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1257 // |
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1258 // Note: because this can be very long, break on 16 iterations, and set state |
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1259 // to 0 when finished, or to 1 when needing to continue. |
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1260 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
257
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1261 // break the loop when total time > 512msec. |
169
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1262 // |
116 | 1263 void calc_hauptroutine_calc_deco(void) |
1264 { | |
169
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1265 overlay unsigned char loop; |
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1266 |
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1267 for(loop = 0; loop < 16; ++loop) |
116 | 1268 { |
257
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1269 // Limit loops to 512ms, using the RTC timer 3: |
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1270 if( tmr3() & (512*32) ) |
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1271 break; |
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1272 |
241 | 1273 // Do not ascent while doing a gas switch ? |
203 | 1274 if( sim_gas_delay <= sim_dive_mins ) |
1275 { | |
241 | 1276 if( calc_nextdecodepth() ) |
1277 { | |
1278 if( temp_depth_limit == 0 ) | |
1279 goto Surface; | |
116 | 1280 |
241 | 1281 //---- We hit a stop at temp_depth_limit --------------------- |
317 | 1282 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
241 | 1283 + pres_surface; // To absolute. |
471 | 1284 if( !update_deco_table() ) // Adds a one minute stops. |
1285 goto Surface; // Deco table full: abort... | |
241 | 1286 } |
1287 else | |
1288 { | |
1289 //---- No stop ----------------------------------------------- | |
317 | 1290 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
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1291 |
241 | 1292 //---- Finish computations once surface is reached ----------- |
1293 if( temp_deco <= pres_surface ) | |
1294 { | |
1295 Surface: | |
471 | 1296 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
312
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1297 copy_deco_table(); |
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1298 |
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1299 calc_ascenttime(); |
471 | 1300 char_O_deco_status = 0; // calc nullzeit next time. |
1301 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
241 | 1302 return; |
1303 } | |
1304 } | |
212 | 1305 } |
1306 else | |
334
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1307 { |
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1308 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1309 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
471 | 1310 if( !update_deco_table() ) // Just pass one minute. |
1311 goto Surface; // Deco table full: abort... | |
334
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1312 } |
197 | 1313 |
241 | 1314 //---- Then update tissue -------------------------------------------- |
203 | 1315 sim_dive_mins++; // Advance simulated time by 1 minute. |
241 | 1316 gas_switch_set(); // Apply any simulated gas change, once validated. |
212 | 1317 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
192 | 1318 sim_tissue(1); // Simulate compartiments for 1 minute. |
116 | 1319 } |
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1320 |
534
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1321 // Surface not reached, need more stops... for menu animation. |
278 | 1322 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
116 | 1323 } |
1324 | |
167 | 1325 ////////////////////////////////////////////////////////////////////////////// |
169
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1326 // Simulation ascention to first deco stop. |
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1327 // |
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1328 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1329 // there is no need to break on more that 16 iterations |
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1330 // (or we are already in deep shit). |
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1331 // |
334
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1332 // Input: pres_respiration |
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1333 // Output: temp_deco |
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1334 // |
312
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1335 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1336 // before ascent. |
169
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1337 void sim_ascent_to_first_stop(void) |
116 | 1338 { |
171 | 1339 update_startvalues(); |
169
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1340 clear_deco_table(); |
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1341 |
200 | 1342 temp_deco = pres_respiration; // Starts from current real depth. |
169
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1343 |
312
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1344 // Are we doing the special @+5min variation ? |
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1345 if(char_O_deco_status & 4) |
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1346 sim_extra_time(); |
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1347 |
212 | 1348 // Do we have a gas switch going on ? |
1349 if( sim_gas_delay > sim_dive_mins ) | |
1350 return; | |
1351 | |
241 | 1352 //---- Loop until first stop, gas switch, or surface is reached ---------- |
169
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1353 for(;;) |
116 | 1354 { |
461 | 1355 overlay float old_deco = temp_deco; // Pamb backup (bars) |
460 | 1356 |
241 | 1357 // Try ascending 1 full minute. |
461 | 1358 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. |
1359 if( temp_deco < pres_surface ) // But don't go over surface. | |
1360 temp_deco = pres_surface; | |
203 | 1361 |
461 | 1362 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because |
1363 // one minute passed. | |
212 | 1364 sim_limit(GF_low); |
1365 | |
1366 // Did we reach deepest remaining stop ? | |
241 | 1367 if( temp_deco < sim_lead_tissue_limit ) |
212 | 1368 { |
461 | 1369 temp_deco = old_deco; // Restore last correct depth, |
1370 break; // Do no spend a minute more. | |
212 | 1371 } |
1372 | |
203 | 1373 // Did we reach surface ? |
460 | 1374 // NOTE: we should round BEFORE checking surface is reached. |
461 | 1375 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
1376 if( temp_depth_limit == 0 ) | |
203 | 1377 { |
1378 temp_deco = pres_surface; // Yes: finished ! | |
1379 break; | |
1380 } | |
169
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1381 |
241 | 1382 // Check for gas change below new depth ? |
1383 if( gas_switch_deepest() ) | |
1384 { | |
334
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1385 assert( temp_depth_limit > 0); |
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1386 |
317 | 1387 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
212 | 1388 break; |
241 | 1389 } |
171 | 1390 |
203 | 1391 sim_dive_mins++; // Advance simulated time by 1 minute. |
241 | 1392 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
203 | 1393 sim_tissue(1); // and update tissues for 1 min. |
1394 } | |
167 | 1395 } |
116 | 1396 |
167 | 1397 ////////////////////////////////////////////////////////////////////////////// |
312
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1398 // Simulation extra time at the current depth. |
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1399 // |
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1400 // This routine is used for @+5min feature. |
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1401 void sim_extra_time(void) |
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1402 { |
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1403 overlay unsigned char extra = read_custom_function(58); |
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1404 do { |
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1405 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1406 sim_tissue(1); // and update tissues for 1 min. |
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1407 } while( --extra != 0 ); |
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1408 } |
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1409 |
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1410 ////////////////////////////////////////////////////////////////////////////// |
167 | 1411 // calc_tissue |
1412 // | |
116 | 1413 // optimized in v.101 |
167 | 1414 // |
184 | 1415 static void calc_tissue(PARAMETER unsigned char period) |
116 | 1416 { |
251 | 1417 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1418 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1419 |
338 | 1420 for (ci=0;ci<NUM_COMP;ci++) |
126 | 1421 { |
258 | 1422 read_buhlmann_times(period); // 2 sec or 1 min period. |
116 | 1423 |
126 | 1424 // N2 |
339 | 1425 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
126 | 1426 temp_tissue_safety(); |
339 | 1427 pres_tissue_N2[ci] += temp_tissue; |
165 | 1428 |
126 | 1429 // He |
339 | 1430 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
126 | 1431 temp_tissue_safety(); |
339 | 1432 pres_tissue_He[ci] += temp_tissue; |
192 | 1433 } |
167 | 1434 } |
116 | 1435 |
167 | 1436 ////////////////////////////////////////////////////////////////////////////// |
192 | 1437 // calc_limit |
167 | 1438 // |
192 | 1439 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
167 | 1440 // |
258 | 1441 static void calc_limit(void) |
167 | 1442 { |
192 | 1443 char_O_gtissue_no = 255; |
1444 calc_lead_tissue_limit = 0.0; | |
1445 | |
338 | 1446 for(ci=0; ci<NUM_COMP;ci++) |
192 | 1447 { |
339 | 1448 overlay float N2 = pres_tissue_N2[ci]; |
1449 overlay float He = pres_tissue_He[ci]; | |
293
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1450 overlay float p = N2 + He; |
192 | 1451 |
258 | 1452 read_buhlmann_coefficients(); |
293
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1453 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1454 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
116 | 1455 |
192 | 1456 // Apply the Eric Baker's varying gradient factor correction. |
1457 // Note: the correction factor depends both on GF and b, | |
1458 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1459 // so that can change who is the leading gas... | |
1460 // Note: Also depends of the GF. So the calcul is different for | |
1461 // GF_low, current GF, or GF_high... | |
1462 // *BUT* calc_tissue() is used to compute bottom time, | |
1463 // hence what would happend at surface, | |
1464 // hence at GF_high. | |
509 | 1465 if( char_I_deco_model != 0 ) |
258 | 1466 p = ( p - var_N2_a * GF_high) * var_N2_b |
1467 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
192 | 1468 else |
1469 p = (p - var_N2_a) * var_N2_b; | |
258 | 1470 if( p < 0.0 ) p = 0.0; |
192 | 1471 |
1472 if( p > calc_lead_tissue_limit ) | |
1473 { | |
1474 char_O_gtissue_no = ci; | |
1475 calc_lead_tissue_limit = p; | |
1476 } | |
1477 } | |
197 | 1478 |
338 | 1479 assert( char_O_gtissue_no < NUM_COMP ); |
197 | 1480 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
167 | 1481 } |
1482 | |
1483 ////////////////////////////////////////////////////////////////////////////// | |
1484 // calc_nullzeit | |
1485 // | |
1486 // calculates the remaining bottom time | |
1487 // | |
511
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1488 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second |
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1489 // exponential term to the M-value equation, making it impossible to |
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1490 // invert... So we have to make a fast-simu until we find a better way. |
509 | 1491 // |
1492 // Input: pres_respiration | |
1493 // Output: char_O_nullzeit | |
167 | 1494 // |
1495 static void calc_nullzeit(void) | |
1496 { | |
511
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1497 //---- Compute ppN2 and ppHe --------------------------------------------- |
509 | 1498 temp_deco = pres_respiration; |
1499 sim_alveolar_presures(); | |
167 | 1500 |
509 | 1501 char_O_nullzeit = 240; |
1502 for(ci=0; ci<NUM_COMP; ci++) | |
1503 { | |
511
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1504 //---- Read A/B values and loading factor for N2 and He -------------- |
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1505 overlay float tN2 = pres_tissue_N2[ci]; |
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1506 overlay float tHe = pres_tissue_He[ci]; |
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1507 overlay float t = tN2 + tHe; |
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1508 overlay unsigned char ndl; |
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1509 overlay unsigned char period = 10; |
192 | 1510 |
509 | 1511 read_buhlmann_coefficients(); |
511
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1512 read_buhlmann_times(2); // Starts with a 10min period. |
509 | 1513 |
511
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1514 //---- Simulate for that tissue -------------------------------------- |
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1515 // NOTE: No need to simulate for longuer than the already found NDL. |
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1516 for(ndl=0; ndl<char_O_nullzeit;) |
509 | 1517 { |
511
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1518 //---- Compute updated mix M-value at surface |
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1519 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; |
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1520 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; |
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1521 overlay float M0 = (a + pres_surface/b); |
116 | 1522 |
511
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1523 //---- Add 10min/1min to N2/He tissues |
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1524 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; |
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1525 overlay float dTHe = (ppHe - tHe) * var_He_e; |
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1526 |
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1527 //---- Apply security margin when using the non-GF model |
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1528 if( char_I_deco_model == 0 ) |
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1529 { |
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1530 dTN2 *= float_saturation_multiplier; |
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1531 dTHe *= float_saturation_multiplier; |
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1532 } |
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1533 else // Or GF-based model |
509 | 1534 M0 = GF_high * (M0 - pres_surface) + pres_surface; |
167 | 1535 |
511
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1536 //---- Simulate off-gasing while going to surface |
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1537 // TODO ! |
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1538 // dTN2 -= exp( ... ascent time ... ppN2...) |
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1539 // dTHe -= exp( ... ascent time ... ppHe...) |
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1540 |
534
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1541 //---- Ok now, and still ok to surface after 1 or 10 minutes ? |
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1542 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) |
509 | 1543 { |
511
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1544 tN2 += dTN2; // YES: apply gas loadings, |
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1545 tHe += dTHe; |
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1546 t = tN2 + tHe; |
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1547 ndl += period; // increment NDL, |
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1548 continue; // and loop. |
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1549 } |
116 | 1550 |
511
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1551 //---- Should we retry with smaller steps ? |
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1552 if( period == 10 ) |
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1553 { |
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1554 read_buhlmann_times(1); // 1min coefs. |
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1555 period = 1; |
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1556 continue; |
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1557 } |
167 | 1558 |
511
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1559 //---- ELSE make a linear approx for the last minute |
524 | 1560 // Usefull to have a meaningfull rounding of NDL. |
1561 // But ONLY it positive (negativ casted to unsigned is bad). | |
1562 if( M0 > t ) | |
1563 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
511
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1564 break; |
509 | 1565 } |
511
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1566 |
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1567 // Keep the shortest NDL found |
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1568 if( ndl < char_O_nullzeit ) |
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1569 char_O_nullzeit = ndl; |
339 | 1570 } |
167 | 1571 } |
116 | 1572 |
167 | 1573 ////////////////////////////////////////////////////////////////////////////// |
1574 // calc_ascenttime | |
1575 // | |
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1576 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1577 // and all stops. |
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1578 // |
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1579 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
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1580 static void calc_ascenttime(void) |
116 | 1581 { |
323 | 1582 overlay unsigned char x; |
1583 overlay unsigned short sum; | |
168 | 1584 |
323 | 1585 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
1586 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
1587 if (ascent < 0.0) | |
1588 ascent = 0.0; | |
1589 sum = (unsigned short)(ascent + 0.99); | |
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1590 |
338 | 1591 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
323 | 1592 sum += (unsigned short)internal_deco_time[x]; |
1593 | |
1594 if( char_O_deco_status == 1 ) | |
1595 int_O_ascenttime = sum; | |
126 | 1596 else |
323 | 1597 int_O_extra_ascenttime = sum; |
167 | 1598 } |
116 | 1599 |
167 | 1600 ////////////////////////////////////////////////////////////////////////////// |
1601 // update_startvalues | |
1602 // | |
116 | 1603 // updated in v.102 |
167 | 1604 // |
116 | 1605 void update_startvalues(void) |
1606 { | |
167 | 1607 overlay unsigned char x; |
116 | 1608 |
201 | 1609 // Start ascent simulation with current tissue partial pressures. |
339 | 1610 for(x=0; x<NUM_COMP; x++) |
116 | 1611 { |
339 | 1612 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
1613 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
116 | 1614 } |
197 | 1615 |
201 | 1616 // No leading tissue (yet) for this ascent simulation. |
197 | 1617 sim_lead_tissue_limit = 0.0; |
1618 sim_lead_tissue_no = 255; | |
167 | 1619 } |
116 | 1620 |
167 | 1621 ////////////////////////////////////////////////////////////////////////////// |
192 | 1622 // sim_tissue |
167 | 1623 // |
116 | 1624 // optimized in v.101 |
167 | 1625 // |
1626 // Function very simular to calc_tissue, but: | |
1627 // + Use a 1min or 10min period. | |
1628 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
184 | 1629 static void sim_tissue(PARAMETER unsigned char period) |
116 | 1630 { |
251 | 1631 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1632 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1633 |
338 | 1634 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1635 { |
258 | 1636 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
165 | 1637 |
126 | 1638 // N2 |
339 | 1639 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
126 | 1640 temp_tissue_safety(); |
339 | 1641 sim_pres_tissue_N2[ci] += temp_tissue; |
126 | 1642 |
1643 // He | |
339 | 1644 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
126 | 1645 temp_tissue_safety(); |
339 | 1646 sim_pres_tissue_He[ci] += temp_tissue; |
192 | 1647 } |
167 | 1648 } |
116 | 1649 |
167 | 1650 ////////////////////////////////////////////////////////////////////////////// |
192 | 1651 // sim_limit() |
1652 // | |
1653 // New in v.111 | |
1654 // | |
1655 // Function separated from sim_tissue() to allow recomputing limit on | |
1656 // different depth, because it depends on current gradient factor. | |
167 | 1657 // |
192 | 1658 static void sim_limit(PARAMETER float GF_current) |
116 | 1659 { |
212 | 1660 assert( 0.0 < GF_current && GF_current <= 1.0f); |
1661 | |
192 | 1662 sim_lead_tissue_limit = 0.0; |
212 | 1663 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
192 | 1664 |
338 | 1665 for(ci=0; ci<NUM_COMP; ci++) |
192 | 1666 { |
339 | 1667 overlay float N2 = sim_pres_tissue_N2[ci]; |
1668 overlay float He = sim_pres_tissue_He[ci]; | |
241 | 1669 overlay float p = N2 + He; |
192 | 1670 |
258 | 1671 read_buhlmann_coefficients(); |
241 | 1672 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
1673 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
192 | 1674 |
1675 // Apply the Eric Baker's varying gradient factor correction. | |
1676 // Note: the correction factor depends both on GF and b, | |
1677 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1678 // so that can change who is the leading gas... | |
1679 // Note: Also depends of the GF_current... | |
509 | 1680 if( char_I_deco_model != 0 ) |
302 | 1681 p = ( p - var_N2_a * GF_current) |
1682 / (GF_current / var_N2_b + 1.0 - GF_current); | |
192 | 1683 else |
1684 p = (p - var_N2_a) * var_N2_b; | |
237 | 1685 if( p < 0.0 ) p = 0.0; |
192 | 1686 |
1687 if( p > sim_lead_tissue_limit ) | |
1688 { | |
1689 sim_lead_tissue_no = ci; | |
1690 sim_lead_tissue_limit = p; | |
1691 } | |
1692 } // for ci | |
197 | 1693 |
338 | 1694 assert( sim_lead_tissue_no < NUM_COMP ); |
237 | 1695 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
167 | 1696 } |
116 | 1697 |
167 | 1698 ////////////////////////////////////////////////////////////////////////////// |
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1699 // clear_deco_table |
167 | 1700 // |
1701 // unchanged in v.101 | |
1702 // | |
169
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1703 static void clear_deco_table(void) |
116 | 1704 { |
169
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1705 overlay unsigned char x; |
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1706 |
338 | 1707 for(x=0; x<NUM_STOPS; ++x) |
169
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1708 { |
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1709 internal_deco_time [x] = 0; |
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1710 internal_deco_depth[x] = 0; |
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1711 } |
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1712 } |
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1713 |
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1714 ////////////////////////////////////////////////////////////////////////////// |
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1715 // update_deco_table |
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1716 // |
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1717 // Add 1 min to current stop. |
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1718 // |
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1719 // Inputs: |
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1720 // temp_depth_limit = stop's depth, in meters. |
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1721 // In/Out: |
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1722 // internal_deco_depth[] : depth (in metres) of each stops. |
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1723 // internal_deco_time [] : time (in minutes) of each stops. |
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1724 // |
471 | 1725 static unsigned char update_deco_table() |
169
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1726 { |
192 | 1727 overlay unsigned char x; |
247
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1728 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1729 assert( temp_depth_limit > 0 ); // No stop at surface... |
169
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1730 |
338 | 1731 for(x=0; x<NUM_STOPS; ++x) |
192 | 1732 { |
212 | 1733 // Make sure deco-stops are recorded in order: |
334
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1734 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
212 | 1735 |
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1736 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
192 | 1737 { |
1738 // Do not overflow (max 255') | |
1739 if( internal_deco_time[x] < 255 ) | |
1740 { | |
1741 internal_deco_time[x]++; | |
471 | 1742 return 1; |
192 | 1743 } |
1744 // But store extra in the next stop... | |
169
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1745 } |
192 | 1746 |
169
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1747 if( internal_deco_depth[x] == 0 ) |
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1748 { |
192 | 1749 internal_deco_depth[x] = temp_depth_limit; |
540
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1750 if( sim_gas_delay >= sim_dive_mins ) |
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1751 internal_deco_depth[x] |= 0x80; |
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1752 |
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1753 internal_deco_time[x] = 1; |
471 | 1754 return 1; |
169
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1755 } |
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1756 } |
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1757 |
192 | 1758 // Can't store stops at more than 96m. |
1759 // Or stops at less that 3m too. | |
169
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1760 // Just do nothing with that... |
471 | 1761 return 0; |
167 | 1762 } |
116 | 1763 |
167 | 1764 ////////////////////////////////////////////////////////////////////////////// |
1765 // calc_gradient_factor | |
1766 // | |
165 | 1767 // optimized in v.101 (var_N2_a) |
116 | 1768 // new code in v.102 |
167 | 1769 // |
1770 static void calc_gradient_factor(void) | |
116 | 1771 { |
197 | 1772 overlay float gf; |
339 | 1773 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
1774 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
237 | 1775 |
338 | 1776 assert( char_O_gtissue_no < NUM_COMP ); |
237 | 1777 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
197 | 1778 |
293
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1779 // tissue > respiration (currently off-gasing) |
302 | 1780 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
1781 // GF = 100% when respiration == limit. | |
293
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1782 temp_tissue = N2 + He; |
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1783 if( temp_tissue <= pres_respiration ) |
197 | 1784 gf = 0.0; |
1785 else | |
1786 { | |
293
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1787 overlay float limit = calc_lead_tissue_limit; |
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1788 // NOTE: in GF model, calc_lead_tissue_limit include already the |
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1789 // correction due to gradient factor. To compute the actual |
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1790 // current GF, we need to (re-)compute the raw ambiant-pressure |
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1791 // limit from the Bühlmann model. |
509 | 1792 if( char_I_deco_model != 0 ) |
293
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1793 { |
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1794 ci = char_O_gtissue_no; |
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1795 read_buhlmann_coefficients(); |
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1796 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1797 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1798 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1799 } |
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1800 |
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1801 gf = (temp_tissue - pres_respiration) |
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1802 / (temp_tissue - limit) |
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1803 * 100.0; |
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1804 if( gf > 254.5 ) gf = 255.0; |
197 | 1805 if( gf < 0.0 ) gf = 0.0; |
1806 } | |
293
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1807 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
116 | 1808 |
509 | 1809 if( char_I_deco_model != 0 ) // calculate relative gradient factor |
116 | 1810 { |
197 | 1811 overlay float rgf; |
1812 | |
562 | 1813 if( low_depth < 3 ) |
197 | 1814 rgf = GF_high; |
1815 else | |
1816 { | |
317 | 1817 overlay float temp1 = low_depth * METER_TO_BAR; |
197 | 1818 overlay float temp2 = pres_respiration - pres_surface; |
186 | 1819 |
197 | 1820 if (temp2 <= 0) |
1821 rgf = GF_high; | |
1822 else if (temp2 >= temp1) | |
1823 rgf = GF_low; | |
1824 else | |
1825 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
1826 } | |
186 | 1827 |
197 | 1828 rgf = gf / rgf; // gf is already in percent |
1829 if( rgf < 0.0 ) rgf = 0.0; | |
293
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1830 if( rgf > 254.5 ) rgf = 255.0; |
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1831 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
116 | 1832 } // calc relative gradient factor |
1833 else | |
1834 { | |
186 | 1835 char_O_relative_gradient_GF = char_O_gradient_factor; |
116 | 1836 } |
167 | 1837 } |
116 | 1838 |
167 | 1839 ////////////////////////////////////////////////////////////////////////////// |
1840 // deco_calc_desaturation_time | |
1841 // | |
116 | 1842 // FIXED N2_ratio |
1843 // unchanged in v.101 | |
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1844 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
233 | 1845 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
167 | 1846 // |
116 | 1847 void deco_calc_desaturation_time(void) |
1848 { | |
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1849 RESET_C_STACK |
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1850 |
233 | 1851 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1852 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1853 | |
237 | 1854 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
233 | 1855 pres_surface = int_I_pres_surface * 0.001; |
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1856 ppN2 = N2_ratio * (pres_surface - ppWater); |
126 | 1857 int_O_desaturation_time = 0; |
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1858 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
233 | 1859 |
339 | 1860 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1861 { |
251 | 1862 overlay unsigned short desat_time; // For a particular compartiment, in min. |
1863 overlay float temp1; | |
1864 overlay float temp2; | |
1865 overlay float temp3; | |
1866 overlay float temp4; | |
338 | 1867 |
509 | 1868 read_buhlmann_ht(); |
338 | 1869 |
126 | 1870 // saturation_time (for flight) and N2_saturation in multiples of halftime |
1871 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
1872 // new in version v.101: 1.07 = 7 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
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1873 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
126 | 1874 // N2 |
339 | 1875 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
1876 temp2 = ppN2 - pres_tissue_N2[ci]; | |
126 | 1877 if (temp2 >= 0.0) |
233 | 1878 temp1 = 0.0; |
126 | 1879 else |
1880 temp1 = temp1 / temp2; | |
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1881 |
251 | 1882 if( 0.0 < temp1 && temp1 < 1.0 ) |
126 | 1883 { |
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1884 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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1885 // minus because log is negative. |
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1886 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
509 | 1887 temp2 = var_N2_ht * temp1 / float_desaturation_multiplier; // time necessary (in minutes ) for complete desaturation (see comment about 5 percent) , new in v.101: float_desaturation_multiplier |
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1888 |
126 | 1889 } |
1890 else | |
1891 { | |
233 | 1892 temp1 = 0.0; |
1893 temp2 = 0.0; | |
126 | 1894 } |
116 | 1895 |
126 | 1896 // He |
339 | 1897 temp3 = 0.1 - pres_tissue_He[ci]; |
126 | 1898 if (temp3 >= 0.0) |
233 | 1899 temp3 = 0.0; |
126 | 1900 else |
339 | 1901 temp3 = - temp3 / pres_tissue_He[ci]; |
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1902 |
251 | 1903 if( 0.0 < temp3 && temp3 < 1.0 ) |
126 | 1904 { |
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1905 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
126 | 1906 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
1907 // minus because log is negative | |
509 | 1908 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
126 | 1909 } |
1910 else | |
1911 { | |
233 | 1912 temp3 = 0.0; |
1913 temp4 = 0.0; | |
126 | 1914 } |
116 | 1915 |
126 | 1916 // saturation_time (for flight) |
1917 if (temp4 > temp2) | |
203 | 1918 desat_time = (unsigned short)temp4; |
126 | 1919 else |
203 | 1920 desat_time = (unsigned short)temp2; |
252 | 1921 |
251 | 1922 if(desat_time > int_O_desaturation_time) |
1923 int_O_desaturation_time = desat_time; | |
116 | 1924 |
126 | 1925 // N2 saturation in multiples of halftime for display purposes |
339 | 1926 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1927 temp2 = temp2 + 80.0; // set center | |
126 | 1928 if (temp2 < 0.0) |
1929 temp2 = 0.0; | |
1930 if (temp2 > 255.0) | |
1931 temp2 = 255.0; | |
339 | 1932 char_O_tissue_N2_saturation[ci] = (char)temp2; |
233 | 1933 |
126 | 1934 // He saturation in multiples of halftime for display purposes |
339 | 1935 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1936 temp4 = temp4 + 80.0; // set center | |
126 | 1937 if (temp4 < 0.0) |
1938 temp4 = 0.0; | |
1939 if (temp4 > 255.0) | |
1940 temp4 = 255.0; | |
339 | 1941 char_O_tissue_He_saturation[ci] = (char)temp4; |
126 | 1942 } // for |
167 | 1943 } |
116 | 1944 |
167 | 1945 ////////////////////////////////////////////////////////////////////////////// |
1946 // calc_wo_deco_step_1_min | |
1947 // | |
116 | 1948 // FIXED N2 Ratio |
1949 // optimized in v.101 (...saturation_multiplier) | |
1950 // desaturation slowed down to 70,42% | |
167 | 1951 // |
1952 static void calc_wo_deco_step_1_min(void) | |
116 | 1953 { |
251 | 1954 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1955 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
1956 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
1957 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1958 | |
126 | 1959 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
368 | 1960 pres_respiration = pres_surface = int_I_pres_surface * 0.001; |
1961 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
200 | 1962 ppHe = 0.0; |
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1963 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
197 | 1964 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
126 | 1965 |
339 | 1966 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
167 | 1967 |
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1968 clear_deco_table(); |
200 | 1969 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
126 | 1970 char_O_nullzeit = 0; |
168 | 1971 int_O_ascenttime = 0; |
323 | 1972 int_O_extra_ascenttime = 0; |
126 | 1973 calc_gradient_factor(); |
167 | 1974 } |
126 | 1975 |
167 | 1976 ////////////////////////////////////////////////////////////////////////////// |
368 | 1977 // calc_dive_interval |
1978 // | |
1979 // Prepare tissue for delay before the next dive simulation. | |
1980 // | |
1981 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
1982 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
1983 // | |
1984 // Should be protected by deco_push_tissues_to_vault(), | |
1985 // deco_pull_tissues_from_vault() | |
1986 // | |
1987 // desaturation slowed down to 70,42%. | |
1988 // | |
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1989 static void calc_dive_interval(void) |
368 | 1990 { |
1991 overlay unsigned char t; | |
491
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1992 overlay unsigned char backup_model; |
368 | 1993 |
1994 //---- Initialize simulation parameters ---------------------------------- | |
1995 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
1996 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
1997 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
1998 ppHe = 0.0; | |
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1999 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
368 | 2000 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
2001 | |
568 | 2002 // Make sure SURFACE_DESAT_FACTOR is applied: |
491
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2003 backup_model = char_I_deco_model; |
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2004 char_I_deco_model = 0; |
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2005 |
368 | 2006 //---- Perform simulation ------------------------------------------------ |
2007 for(t=0; t<char_I_dive_interval; ++t) | |
2008 { | |
2009 calc_tissue(2); // period = 10min. | |
2010 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
2011 } | |
514 | 2012 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
2013 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); | |
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2014 |
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2015 //---- Restore model ----------------------------------------------------- |
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2016 char_I_deco_model = backup_model; |
368 | 2017 } |
2018 | |
2019 ////////////////////////////////////////////////////////////////////////////// | |
167 | 2020 ////////////////////////////////////////////////////////////////////////////// |
2021 ////////////////////////////////// deco_hash ///////////////////////////////// | |
2022 ////////////////////////////////////////////////////////////////////////////// | |
2023 ////////////////////////////////////////////////////////////////////////////// | |
126 | 2024 |
184 | 2025 #ifndef CROSS_COMPILE |
116 | 2026 void deco_hash(void) |
2027 { | |
167 | 2028 overlay unsigned char md_i, md_j; // Loop index. |
2029 overlay unsigned char md_t; | |
2030 overlay unsigned char md_buffer[16]; | |
2031 overlay unsigned char md_temp; | |
203 | 2032 overlay unsigned short md_pointer; |
167 | 2033 |
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2034 RESET_C_STACK |
126 | 2035 |
2036 // init | |
164 | 2037 for(md_i=0;md_i<16;md_i++) |
126 | 2038 { |
2039 md_state[md_i] = 0; | |
164 | 2040 char_O_hash[md_i] = 0; |
126 | 2041 } // for md_i 16 |
116 | 2042 |
126 | 2043 _asm |
167 | 2044 movlw 0x01 // md_pi address. |
2045 movwf TBLPTRU,0 | |
2046 movlw 0x7E | |
2047 movwf TBLPTRH,0 | |
2048 movlw 0x00 | |
2049 movwf TBLPTRL,0 | |
126 | 2050 _endasm; |
165 | 2051 md_i = 0; |
2052 do { | |
126 | 2053 _asm |
2054 TBLRDPOSTINC | |
2055 movff TABLAT,md_temp | |
2056 _endasm | |
165 | 2057 md_pi_subst[md_i++] = md_temp; |
2058 } while( md_i != 0 ); | |
2059 | |
126 | 2060 _asm |
167 | 2061 movlw 0x00 |
2062 movwf TBLPTRU,0 | |
2063 movlw 0x00 | |
2064 movwf TBLPTRH,0 | |
2065 movlw 0x00 | |
2066 movwf TBLPTRL,0 | |
126 | 2067 _endasm |
167 | 2068 |
126 | 2069 // cycle buffers |
2070 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
2071 { | |
2072 md_t = 0; | |
2073 for (md_i=0;md_i<16;md_i++) | |
2074 { | |
2075 if(md_pointer == 9) | |
164 | 2076 md_temp = char_O_hash[md_i]; |
126 | 2077 else |
2078 { | |
2079 _asm | |
167 | 2080 TBLRDPOSTINC |
2081 movff TABLAT,md_temp | |
126 | 2082 _endasm |
2083 } // else | |
167 | 2084 |
2085 md_buffer[md_i] = md_temp; | |
186 | 2086 md_state[md_i+16] = md_temp; |
2087 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
126 | 2088 } // for md_i 16 |
2089 | |
2090 for (md_i=0;md_i<18;md_i++) | |
2091 { | |
2092 for (md_j=0;md_j<48;md_j++) | |
2093 { | |
167 | 2094 md_state[md_j] ^= md_pi_subst[md_t]; |
126 | 2095 md_t = md_state[md_j]; |
2096 } // for md_j 48 | |
2097 md_t = (unsigned char)(md_t+1); | |
2098 } // for md_i 18 | |
164 | 2099 md_t = char_O_hash[15]; |
126 | 2100 |
2101 for (md_i=0;md_i<16;md_i++) | |
2102 { | |
167 | 2103 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
164 | 2104 md_t = char_O_hash[md_i]; |
126 | 2105 } // for md_i 16 |
2106 } // for md_pointer | |
116 | 2107 } // void deco_hash(void) |
184 | 2108 #endif |
116 | 2109 |
167 | 2110 ////////////////////////////////////////////////////////////////////////////// |
2111 // deco_clear_CNS_fraction | |
2112 // | |
116 | 2113 // new in v.101 |
167 | 2114 // |
116 | 2115 void deco_clear_CNS_fraction(void) |
2116 { | |
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2117 RESET_C_STACK |
237 | 2118 |
126 | 2119 CNS_fraction = 0.0; |
2120 char_O_CNS_fraction = 0; | |
167 | 2121 } |
116 | 2122 |
167 | 2123 ////////////////////////////////////////////////////////////////////////////// |
2124 // deco_calc_CNS_fraction | |
2125 // | |
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2126 // Input: char_I_actual_ppO2 : Current condition (in decibars). |
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2127 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. |
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2128 // CNS_fraction : velue before period. |
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2129 // Output: CNS_fraction, char_O_CNS_fraction |
167 | 2130 // |
116 | 2131 void deco_calc_CNS_fraction(void) |
2132 { | |
292 | 2133 overlay float time_factor = 1.0f; |
126 | 2134 RESET_C_STACK |
167 | 2135 |
471 | 2136 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2137 assert( char_I_actual_ppO2 > 15 ); |
2138 | |
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2139 if( char_I_step_is_1min == 1 ) |
292 | 2140 time_factor = 30.0f; |
439
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2141 else if( char_I_step_is_1min == 2 ) |
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2142 time_factor = 300.0f; |
116 | 2143 |
126 | 2144 if (char_I_actual_ppO2 < 50) |
292 | 2145 ; // no changes |
126 | 2146 else if (char_I_actual_ppO2 < 60) |
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2147 CNS_fraction += time_factor/(-540.0 * char_I_actual_ppO2 + 54000.0); |
126 | 2148 else if (char_I_actual_ppO2 < 70) |
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2149 CNS_fraction += time_factor/(-450.0 * char_I_actual_ppO2 + 48600.0); |
126 | 2150 else if (char_I_actual_ppO2 < 80) |
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2151 CNS_fraction += time_factor/(-360.0 * char_I_actual_ppO2 + 42300.0); |
126 | 2152 else if (char_I_actual_ppO2 < 90) |
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2153 CNS_fraction += time_factor/(-270.0 * char_I_actual_ppO2 + 35100.0); |
126 | 2154 else if (char_I_actual_ppO2 < 110) |
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2155 CNS_fraction += time_factor/(-180.0 * char_I_actual_ppO2 + 27000.0); |
126 | 2156 else if (char_I_actual_ppO2 < 150) |
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2157 CNS_fraction += time_factor/( -90.0 * char_I_actual_ppO2 + 17100.0); |
126 | 2158 else if (char_I_actual_ppO2 < 160) |
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2159 CNS_fraction += time_factor/(-225.0 * char_I_actual_ppO2 + 37350.0); |
126 | 2160 else if (char_I_actual_ppO2 < 165) |
292 | 2161 CNS_fraction += time_factor*0.000755; // Arieli et all.(2002): Modeling pulmonary and CNS O2 toxicity... Formula (A1) based on value for 1.55 and c=20 |
126 | 2162 else if (char_I_actual_ppO2 < 170) |
292 | 2163 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
126 | 2164 else if (char_I_actual_ppO2 < 175) |
292 | 2165 CNS_fraction += time_factor*0.00136; |
126 | 2166 else if (char_I_actual_ppO2 < 180) |
292 | 2167 CNS_fraction += time_factor*0.00180; |
126 | 2168 else if (char_I_actual_ppO2 < 185) |
292 | 2169 CNS_fraction += time_factor*0.00237; |
126 | 2170 else if (char_I_actual_ppO2 < 190) |
292 | 2171 CNS_fraction += time_factor*0.00310; |
126 | 2172 else if (char_I_actual_ppO2 < 195) |
292 | 2173 CNS_fraction += time_factor*0.00401; |
126 | 2174 else if (char_I_actual_ppO2 < 200) |
292 | 2175 CNS_fraction += time_factor*0.00517; |
126 | 2176 else if (char_I_actual_ppO2 < 230) |
292 | 2177 CNS_fraction += time_factor*0.0209; |
126 | 2178 else |
292 | 2179 CNS_fraction += time_factor*0.0482; // value for 2.5 |
116 | 2180 |
514 | 2181 if( CNS_fraction > 2.5 ) |
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2182 CNS_fraction = 2.55; |
514 | 2183 if( CNS_fraction < 0.0 ) |
126 | 2184 CNS_fraction = 0.0; |
2185 | |
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2186 char_O_CNS_fraction = (unsigned char)(100.0 * CNS_fraction + 0.5); |
167 | 2187 } |
116 | 2188 |
167 | 2189 ////////////////////////////////////////////////////////////////////////////// |
439
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2190 // deco_calc_CNS_planning |
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2191 // |
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2192 // Compute CNS during predicted ascent. |
488 | 2193 // |
2194 // Note: Needs a call to deco_push_tissues_to_vault(), | |
2195 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
2196 // | |
2197 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
2198 // Output: CNS_fraction, char_O_CNS_fraction | |
2199 // | |
439
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2200 void deco_calc_CNS_planning(void) |
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2201 { |
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2202 overlay unsigned char backup_gas_last_depth; |
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2203 overlay unsigned char backup_gas_last_used; |
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2204 overlay unsigned short backup_gas_delay; |
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2205 overlay unsigned short backup_dive_mins; |
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2206 overlay unsigned char backup_actual_ppO2; |
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2207 |
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2208 RESET_C_STACK |
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2209 |
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2210 // Backup state machine |
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2211 backup_gas_last_depth = sim_gas_last_depth; |
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2212 backup_gas_last_used = sim_gas_last_used; |
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2213 backup_gas_delay = sim_gas_delay; |
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2214 backup_dive_mins = sim_dive_mins; |
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2215 backup_actual_ppO2 = char_I_actual_ppO2; |
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2216 |
439
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2217 // Uses 1min CNS period: |
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2218 char_I_step_is_1min = 1; |
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2219 |
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2220 //---- Retrieve bottom Gas used, and set variables. |
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2221 sim_gas_last_used = char_I_first_gas; |
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2222 sim_gas_last_depth = 0; // Surface gas marker. |
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2223 gas_switch_set(); // Sets initial calc_N2/He_ratio |
439
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2224 |
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2225 //---- CCR mode : do the full TTS at once -------------------------------- |
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2226 if( char_I_const_ppO2 != 0 ) |
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2227 { |
443
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2228 overlay unsigned short t; // Needs 16bits here ! |
439
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2229 char_I_actual_ppO2 = char_I_const_ppO2; |
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2230 for(t=0; t<int_O_ascenttime; ++t) |
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2231 deco_calc_CNS_fraction(); |
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2232 } |
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2233 else //---- OC mode : have to follow all gas switches... ----------------- |
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2234 { |
443
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2235 overlay unsigned char i = 0; // Decostop loop counter |
439
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2236 overlay float actual_ppO2; |
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2237 overlay unsigned char time, t; |
563 | 2238 overlay unsigned char deepest_first = (read_custom_function(54) == 0); |
439
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2239 |
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2240 //---- Ascent to surface delay |
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2241 // NOTE: count as if time is spent with bottom pressure, |
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2242 // AND the bottom gas |
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2243 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) |
439
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2244 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2245 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2246 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2247 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2248 |
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2249 // Ascent time (rounded up): |
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2250 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); |
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2251 |
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2252 for(t=0; t<time; ++t) |
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2253 { |
439
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2254 deco_calc_CNS_fraction(); |
490
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2255 sim_dive_mins++; |
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2256 } |
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2257 |
563 | 2258 //---- Do all further stops ------------------------------------------ |
439
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2259 for(i=0; i<NUM_STOPS; ++i) |
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2260 { |
563 | 2261 overlay unsigned char switch_gas; |
2262 | |
2263 //---- Get next stop, possibly in reverse order ------------------ | |
2264 if( deepest_first ) | |
2265 { | |
2266 time = char_O_deco_time[i]; | |
2267 temp_depth_limit = char_O_deco_depth[i]; | |
2268 } | |
2269 else | |
2270 { | |
2271 time = char_O_deco_time[(NUM_STOPS-1)-i]; | |
2272 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i]; | |
2273 } | |
2274 if( time == 0 ) continue; | |
439
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2275 |
563 | 2276 //---- Gas Switch ? ---------------------------------------------- |
2277 switch_gas = temp_depth_limit & 0x80; // Switch flag. | |
2278 temp_depth_limit &= 0x7F; // True stop depth. | |
2279 | |
2280 if( switch_gas ) | |
2281 { | |
2282 gas_switch_deepest(); | |
2283 gas_switch_set(); | |
2284 } | |
2285 | |
2286 //---- Convert Depth and N2_ratio to ppO2 ------------------------ | |
541
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2287 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) |
439
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2288 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2289 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2290 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2291 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2292 |
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2293 //---- Apply the stop |
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2294 for(t=0; t<time; ++t) |
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2295 { |
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2296 deco_calc_CNS_fraction(); |
490
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2297 sim_dive_mins++; |
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2298 } |
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2299 } |
488 | 2300 } |
2301 | |
563 | 2302 //---- Back to normal mode... -------------------------------------------- |
488 | 2303 char_I_step_is_1min = 0; |
490
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2304 sim_gas_last_depth = backup_gas_last_depth; |
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2305 sim_gas_last_used = backup_gas_last_used; |
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2306 sim_gas_delay = backup_gas_delay; |
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2307 sim_dive_mins = backup_dive_mins; |
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2308 char_I_actual_ppO2 = backup_actual_ppO2; |
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2309 } |
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2310 |
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2311 ////////////////////////////////////////////////////////////////////////////// |
167 | 2312 // deco_calc_CNS_decrease_15min |
2313 // | |
116 | 2314 // new in v.101 |
167 | 2315 // |
116 | 2316 // calculates the half time of 90 minutes in 6 steps of 15 min |
200 | 2317 // (Used in sleepmode, for low battery mode). |
167 | 2318 // |
116 | 2319 // Output: char_O_CNS_fraction |
2320 // Uses and Updates: CNS_fraction | |
167 | 2321 // |
116 | 2322 void deco_calc_CNS_decrease_15min(void) |
2323 { | |
237 | 2324 RESET_C_STACK |
514 | 2325 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2326 |
126 | 2327 CNS_fraction = 0.890899 * CNS_fraction; |
514 | 2328 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
167 | 2329 } |
116 | 2330 |
167 | 2331 ////////////////////////////////////////////////////////////////////////////// |
2332 // deco_calc_percentage | |
2333 // | |
116 | 2334 // new in v.101 |
167 | 2335 // |
116 | 2336 // calculates int_I_temp * char_I_temp / 100 |
2337 // output is int_I_temp | |
200 | 2338 // |
2339 // Used to compute NoFly remaining time. | |
222
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2340 // |
116 | 2341 void deco_calc_percentage(void) |
2342 { | |
122
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2343 RESET_C_STACK |
222
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2344 |
237 | 2345 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
564 | 2346 assert( int_I_temp < 5760 ); // Less than 4 days = 96h... |
237 | 2347 |
222
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2348 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
237 | 2349 |
554
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2350 assert( int_I_temp < 5760 ); // Less than 96h too... |
222
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2351 } |
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2352 |
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2353 |
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2354 ////////////////////////////////////////////////////////////////////////////// |
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2355 // deco_gas_volumes |
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2356 // |
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2357 // new in v.111 |
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2358 // |
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2359 // calculates volumes for each gas. |
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2360 // |
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2361 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
240
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2362 // Gas list. |
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2363 // char_I_first_gas is the bottom gas. |
222
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2364 // decoplan (char_O_deco_depth, char_O_deco_time). |
234
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2365 // CF#54 == TRUE if shallowest stop first. |
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2366 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min. |
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2367 // CF#57 == deco liters/minutes (5 .. 50) or bar/min. |
224 | 2368 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
222
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2369 // |
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2370 void deco_gas_volumes(void) |
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2371 { |
338 | 2372 overlay float volumes[NUM_GAS]; |
478
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2373 overlay float bottom_usage, deco_usage; |
234
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2374 overlay unsigned char i, deepest_first; |
646 | 2375 overlay unsigned char gas, depth; |
222
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2376 RESET_C_STACK |
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2377 |
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2378 //---- initialize with bottom consumption -------------------------------- |
338 | 2379 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
240
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2380 volumes[i] = 0.0; |
222
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2381 |
338 | 2382 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
241 | 2383 gas = char_I_first_gas - 1; |
2384 | |
478
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2385 bottom_usage = (float) read_custom_function(56); |
580
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BUGFIX: GasVolume should not count bottom time/depth in CCR mode.
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2386 if( char_I_const_ppO2 == 0 && bottom_usage > 0.0 ) |
265 | 2387 volumes[gas] |
2388 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
2389 * char_I_bottom_time // in minutes. | |
2390 * bottom_usage; // In liter/minutes. | |
579
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2391 |
222
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2392 //---- Ascent usage ------------------------------------------------------ |
234
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2393 deepest_first = read_custom_function(54) == 0; |
511
2a6293641d51
NEW NDL NDL faster/more precise simu (but no closed formula for trimix).
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509
diff
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|
2394 deco_usage = (float) read_custom_function(57); // In liter/minutes. |
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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218
diff
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2395 |
646 | 2396 depth = char_I_bottom_depth; |
222
638f8e17bd51
Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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diff
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2397 |
338 | 2398 for(i=0; i<NUM_STOPS; ++i) |
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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diff
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|
2399 { |
658
75dc320f4681
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|
2400 overlay unsigned char newDepth, time; |
234
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|
2401 |
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BUGFIX Gas Usage when stops are shallowest first: CF54 (bug BB24).
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diff
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2402 // Manage stops in reverse order (CF#54) |
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BUGFIX Gas Usage when stops are shallowest first: CF54 (bug BB24).
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diff
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|
2403 if( deepest_first ) |
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2404 { |
241 | 2405 time = char_O_deco_time[i]; |
234
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2406 if( time == 0 ) break; // End of table: done. |
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2407 |
658
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|
2408 newDepth = char_O_deco_depth[i] & 0x7F; |
234
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2409 } |
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2410 else |
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|
2411 { |
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|
2412 time = char_O_deco_time[31-i]; |
658
75dc320f4681
BUGFIX Gas volumes when many tanks and stops.
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parents:
646
diff
changeset
|
2413 if( time == 0 ) continue; // not yet: still search table. |
234
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2414 |
658
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|
2415 newDepth = char_O_deco_depth[31-i] & 0x7F; |
234
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|
2416 } |
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2417 |
658
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changeset
|
2418 //---- Gas switch during this step ----------------------------------- |
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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diff
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|
2419 { |
658
75dc320f4681
BUGFIX Gas volumes when many tanks and stops.
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|
2420 overlay unsigned char newGas = 0; |
75dc320f4681
BUGFIX Gas volumes when many tanks and stops.
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parents:
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diff
changeset
|
2421 overlay unsigned char newStop = 0; // NO CHANGE yet |
75dc320f4681
BUGFIX Gas volumes when many tanks and stops.
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diff
changeset
|
2422 overlay unsigned char j; |
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BUGFIX Gas volumes when many tanks and stops.
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changeset
|
2423 |
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BUGFIX Gas volumes when many tanks and stops.
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|
2424 for(j=0; j<NUM_GAS; ++j) |
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BUGFIX Gas volumes when many tanks and stops.
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parents:
646
diff
changeset
|
2425 { |
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diff
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|
2426 // Skip gas without changing depth: |
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diff
changeset
|
2427 if( ! char_I_deco_gas_change[j] ) |
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BUGFIX Gas volumes when many tanks and stops.
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changeset
|
2428 continue; |
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|
2429 // Select gas changed between [newDepth .. depth] |
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diff
changeset
|
2430 if( newDepth <= char_I_deco_gas_change[j] |
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diff
changeset
|
2431 && char_I_deco_gas_change[j] <= depth ) |
646 | 2432 { |
658
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diff
changeset
|
2433 // Keep the DEEPEST gas in that range: |
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diff
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|
2434 // Note: that = means changing gas at BEGINNING of this stop. |
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|
2435 if( char_I_deco_gas_change[j] >= newStop ) |
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diff
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|
2436 { |
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diff
changeset
|
2437 newGas = j; |
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diff
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|
2438 newStop = char_I_deco_gas_change[j]; |
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diff
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|
2439 } |
646 | 2440 } |
658
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diff
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|
2441 } |
222
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|
2442 |
658
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diff
changeset
|
2443 if( newStop ) // Did we find something ? |
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diff
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|
2444 { |
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diff
changeset
|
2445 // usage BEFORE gas switch (if any), at 10m/min : |
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diff
changeset
|
2446 if( deco_usage > 0.0 && depth > newStop ) |
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diff
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|
2447 // Plus usage during ascent to the next stop, at 10m/min. |
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diff
changeset
|
2448 volumes[gas] += ((depth+newStop)*0.05 + 1.0) // average depth --> bar. |
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diff
changeset
|
2449 * (depth-newStop)*0.1 // metre --> min |
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646
diff
changeset
|
2450 * deco_usage; |
646 | 2451 |
658
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diff
changeset
|
2452 // Do gas switch: |
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diff
changeset
|
2453 gas = newGas; |
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diff
changeset
|
2454 depth = newStop; |
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diff
changeset
|
2455 } |
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diff
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|
2456 } |
646 | 2457 |
2458 // usage AFTER gas switch (if any), at 10m/min : | |
2459 if( depth > newDepth ) | |
2460 volumes[gas] += ((depth+newDepth)*0.05 + 1.0) // average depth --> bar. | |
2461 * (depth-newDepth)*0.1 // metre --> min | |
2462 * deco_usage; | |
2463 | |
2464 // Do stop: | |
2465 depth = newDepth; | |
2466 | |
2467 // Usage at stop: | |
478
fd8266b511cc
New SAC (CF56/CF57) in 5..50 l/min range (no more decimal).
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471
diff
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|
2468 if( deco_usage > 0.0 ) |
265 | 2469 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
2470 * time // in minutes. | |
646 | 2471 * deco_usage; // in xxx / min @ 1bar. |
265 | 2472 else |
2473 volumes[gas] = 65535.0; | |
222
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|
2474 } |
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diff
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|
2475 |
646 | 2476 // From last stop to surface |
2477 if( deco_usage > 0.0 ) | |
2478 volumes[gas] += (depth*0.05 + 1.0) // avg depth --> bar. | |
2479 * depth * 0.1 // time to surface, in minutes. | |
2480 * deco_usage; // in xxx / min @ 1bar. | |
2481 | |
222
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2482 //---- convert results for the ASM interface ----------------------------- |
338 | 2483 for(i=0; i<NUM_GAS; ++i) |
441
4826dd98514b
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|
2484 if( volumes[i] > 65534.0 ) |
224 | 2485 int_O_gas_volumes[i] = 65535; |
222
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218
diff
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|
2486 else |
441
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NEW: Decoplanner OC volumes in liters (or bars), up to 65000.
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|
2487 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); |
116 | 2488 } |
2489 | |
167 | 2490 ////////////////////////////////////////////////////////////////////////////// |
2491 | |
116 | 2492 void deco_push_tissues_to_vault(void) |
2493 { | |
167 | 2494 overlay unsigned char x; |
122
3003a8040b78
FIX again reset C data stack and frame pointer when entering C code.
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diff
changeset
|
2495 RESET_C_STACK |
167 | 2496 |
116 | 2497 cns_vault = CNS_fraction; |
339 | 2498 for (x=0;x<NUM_COMP;x++) |
2499 { | |
2500 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
2501 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
2502 } | |
116 | 2503 } |
167 | 2504 |
116 | 2505 void deco_pull_tissues_from_vault(void) |
2506 { | |
167 | 2507 overlay unsigned char x; |
122
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diff
changeset
|
2508 RESET_C_STACK |
167 | 2509 |
339 | 2510 for (x=0; x<NUM_COMP; x++) |
2511 { | |
2512 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
2513 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
2514 } | |
292 | 2515 |
2516 // Restore both CNS variable, too. | |
2517 CNS_fraction = cns_vault; | |
514 | 2518 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
116 | 2519 } |
2520 | |
167 | 2521 ////////////////////////////////////////////////////////////////////////////// |
2522 // | |
184 | 2523 #ifndef CROSS_COMPILE |
2524 void main() {} | |
2525 #endif |