Mercurial > public > mk2
annotate code_part1/OSTC_code_c_part2/p2_deco.c @ 635:5ad7e8280d8f
Spanish update
author | heinrichsweikamp |
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date | Tue, 18 Sep 2012 09:02:27 +0200 |
parents | 242139da29f2 |
children | b48f613398f9 |
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. |
116 | 86 // |
167 | 87 // TODO: |
88 // + Allow to abort MD2 calculation (have to restart next time). | |
89 // | |
90 // Literature: | |
200 | 91 // Bühlmann, Albert: Tauchmedizin; 4. Auflage [2002]; |
116 | 92 // 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 |
93 // Morrison, Stuart; 2000; DIY DECOMPRESSION; http://www.lizardland.co.uk/DIYDeco.html | |
94 // Balthasar, Steffen; Dekompressionstheorie I: Neo Haldane Modelle; http://www.txfreak.de/dekompressionstheorie_1.pdf | |
95 // Baker, Erik C.; Clearing Up The Confusion About "Deep Stops" | |
96 // Baker, Erik C.; Understanding M-values; http://www.txfreak.de/understanding_m-values.pdf | |
167 | 97 // |
98 // | |
116 | 99 |
100 // ********************* | |
101 // ** I N C L U D E S ** | |
102 // ********************* | |
103 #include <math.h> | |
167 | 104 |
192 | 105 // *********************************************** |
106 // ** V A R I A B L E S D E F I N I T I O N S ** | |
107 // *********************************************** | |
108 | |
109 #include "p2_definitions.h" | |
275
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110 #define TEST_MAIN |
509 | 111 #include "../OSTC_code_asm_part1/shared_definitions.h" |
192 | 112 |
200 | 113 // Water vapour partial pressure in the lumb. |
527 | 114 #define ppWater 0.0627 |
317 | 115 #define METER_TO_BAR 0.09985 |
116 #define BAR_TO_METER 10.0150 // (1.0/METER_TO_BAR) | |
200 | 117 |
491
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118 // Surface security factor |
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119 #define SURFACE_DESAT_FACTOR 0.7042 |
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120 |
167 | 121 // ************************* |
122 // ** P R O T O T Y P E S ** | |
123 // ************************* | |
124 | |
125 static void calc_hauptroutine(void); | |
126 static void calc_nullzeit(void); | |
127 | |
192 | 128 static void calc_tissue(PARAMETER unsigned char period); |
258 | 129 static void calc_limit(void); |
192 | 130 |
167 | 131 static void clear_tissue(void); |
132 static void calc_ascenttime(void); | |
133 static void update_startvalues(void); | |
169
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134 static void clear_deco_table(void); |
471 | 135 static unsigned char update_deco_table(void); |
192 | 136 |
137 static void sim_tissue(PARAMETER unsigned char period); | |
138 static void sim_limit(PARAMETER float GF_current); | |
312
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139 static void sim_extra_time(void); |
368 | 140 static void calc_dive_interval(void); |
312
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141 |
167 | 142 static void calc_gradient_factor(void); |
143 static void calc_wo_deco_step_1_min(void); | |
144 | |
145 static void calc_hauptroutine_data_input(void); | |
146 static void calc_hauptroutine_update_tissues(void); | |
147 static void calc_hauptroutine_calc_deco(void); | |
169
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148 static void sim_ascent_to_first_stop(void); |
167 | 149 |
241 | 150 static unsigned char gas_switch_deepest(void); |
151 static void gas_switch_set(void); | |
217 | 152 |
241 | 153 static unsigned char calc_nextdecodepth(void); |
116 | 154 |
200 | 155 //---- Bank 4 parameters ----------------------------------------------------- |
601
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156 #ifndef UNIX |
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157 # pragma udata bank4=0x400 |
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158 #endif |
116 | 159 |
160 static float GF_low; | |
161 static float GF_high; | |
162 static float GF_delta; | |
192 | 163 static float locked_GF_step; // GF_delta / low_depth |
164 | |
165 static unsigned char temp_depth_limit; | |
562 | 166 static unsigned char low_depth; // Depth of deepest stop |
171 | 167 |
192 | 168 // Simulation context: used to predict ascent. |
169 static unsigned char sim_lead_tissue_no; // Leading compatiment number. | |
170 static float sim_lead_tissue_limit; // Buhlmann tolerated pressure. | |
116 | 171 |
192 | 172 // Real context: what we are doing now. |
173 static float calc_lead_tissue_limit; // | |
116 | 174 |
338 | 175 static unsigned char internal_deco_time[NUM_STOPS]; |
176 static unsigned char internal_deco_depth[NUM_STOPS]; | |
116 | 177 |
178 static float cns_vault; | |
339 | 179 static float pres_tissue_N2_vault[NUM_COMP]; |
180 static float pres_tissue_He_vault[NUM_COMP]; | |
116 | 181 |
163 | 182 //---- Bank 5 parameters ----------------------------------------------------- |
601
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183 #ifndef UNIX |
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184 # pragma udata bank5=0x500 |
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185 #endif |
163 | 186 |
167 | 187 static unsigned char ci; |
116 | 188 static float pres_respiration; |
189 static float pres_surface; | |
190 static float temp_deco; | |
236 | 191 static float ppN2; |
200 | 192 static float ppHe; |
116 | 193 static float temp_tissue; |
200 | 194 static float N2_ratio; // Breathed gas nitrogen ratio. |
195 static float He_ratio; // Breathed gas helium ratio. | |
196 static float var_N2_a; // Bühlmann a, for current N2 tissue. | |
197 static float var_N2_b; // Bühlmann b, for current N2 tissue. | |
198 static float var_He_a; // Bühlmann a, for current He tissue. | |
199 static float var_He_b; // Bühlmann b, for current He tissue. | |
200 static float var_N2_e; // Exposition, for current N2 tissue. | |
201 static float var_He_e; // Exposition, for current He tissue. | |
509 | 202 static float var_N2_ht; // Half-time for current N2 tissue. |
203 static float var_He_ht; // Half-time for current N2 tissue. | |
116 | 204 |
338 | 205 static float pres_diluent; // new in v.101 |
206 static float const_ppO2; // new in v.101 | |
116 | 207 |
241 | 208 static unsigned char sim_gas_last_depth; // Depth of last used gas, to detected a gas switch. |
209 static unsigned char sim_gas_last_used; // Number of last used gas, to detected a gas switch. | |
203 | 210 static unsigned short sim_gas_delay; // Time of gas-switch-stop ends [min on dive]. |
211 static unsigned short sim_dive_mins; // Simulated dive time. | |
200 | 212 static float calc_N2_ratio; // Simulated (switched) nitrogen ratio. |
213 static float calc_He_ratio; // Simulated (switched) helium ratio. | |
214 static float CNS_fraction; // new in v.101 | |
215 static float float_saturation_multiplier; // new in v.101 | |
216 static float float_desaturation_multiplier; // new in v.101 | |
338 | 217 static float float_deco_distance; // new in v.101 |
218 static char flag_in_divemode; // new in v.108 | |
167 | 219 |
338 | 220 static unsigned char deco_gas_change[NUM_GAS]; // new in v.109 |
167 | 221 |
163 | 222 //---- Bank 6 parameters ----------------------------------------------------- |
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223 #ifndef UNIX |
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224 # pragma udata bank6=0x600 |
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225 #endif |
116 | 226 |
339 | 227 float pres_tissue_N2[NUM_COMP]; |
228 float pres_tissue_He[NUM_COMP]; | |
509 | 229 float sim_pres_tissue_N2[NUM_COMP]; // 16 floats = 64 bytes. |
230 float sim_pres_tissue_He[NUM_COMP]; // 16 floats = 64 bytes. | |
116 | 231 |
163 | 232 //---- Bank 7 parameters ----------------------------------------------------- |
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233 #ifndef UNIX |
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234 # pragma udata bank7=0x700 |
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235 #endif |
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236 |
509 | 237 // EMPTY ... |
116 | 238 |
163 | 239 //---- Bank 8 parameters ----------------------------------------------------- |
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240 #ifndef UNIX |
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241 # pragma udata bank8=0x800 |
163 | 242 |
601
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243 static char md_pi_subst[256]; |
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244 # define C_STACK md_pi_subst // Overlay C-code data stack here, too. |
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245 |
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246 #endif |
116 | 247 |
163 | 248 //---- Bank 9 parameters ----------------------------------------------------- |
601
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249 #ifndef UNIX |
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250 # pragma udata bank9=0x900 |
116 | 251 |
601
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252 static char md_state[48]; // DONT MOVE : has to be at the beginning of bank 9 for the asm code!!! |
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253 #endif |
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254 |
116 | 255 |
167 | 256 ////////////////////////////////////////////////////////////////////////////// |
257 ////////////////////////////////////////////////////////////////////////////// | |
258 ///////////////////////////// THE LOOKUP TABLES ////////////////////////////// | |
259 ////////////////////////////////////////////////////////////////////////////// | |
260 ////////////////////////////////////////////////////////////////////////////// | |
261 // | |
262 // End of PROM code is 17F00, So push tables on PROM top... | |
263 // | |
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264 #ifndef UNIX |
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265 # pragma romdata buhlmann_tables = 0x017B00 // Needs to be in UPPER bank. |
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266 #endif |
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267 |
167 | 268 #include "p2_tables.romdata" // new table for deco_main_v.101 (var_N2_a modified) |
116 | 269 |
167 | 270 // Magic table to compute the MD2 HASH |
271 // | |
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272 #ifndef UNIX |
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273 # pragma romdata hash_tables = 0x017E00 // Address fixed by ASM access... |
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274 rom const rom unsigned short md_pi[] = |
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275 { |
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276 0x292E, 0x43C9, 0xA2D8, 0x7C01, 0x3D36, 0x54A1, 0xECF0, 0x0613 |
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277 , 0x62A7, 0x05F3, 0xC0C7, 0x738C, 0x9893, 0x2BD9, 0xBC4C, 0x82CA |
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278 , 0x1E9B, 0x573C, 0xFDD4, 0xE016, 0x6742, 0x6F18, 0x8A17, 0xE512 |
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279 , 0xBE4E, 0xC4D6, 0xDA9E, 0xDE49, 0xA0FB, 0xF58E, 0xBB2F, 0xEE7A |
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280 , 0xA968, 0x7991, 0x15B2, 0x073F, 0x94C2, 0x1089, 0x0B22, 0x5F21 |
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281 , 0x807F, 0x5D9A, 0x5A90, 0x3227, 0x353E, 0xCCE7, 0xBFF7, 0x9703 |
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282 , 0xFF19, 0x30B3, 0x48A5, 0xB5D1, 0xD75E, 0x922A, 0xAC56, 0xAAC6 |
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283 , 0x4FB8, 0x38D2, 0x96A4, 0x7DB6, 0x76FC, 0x6BE2, 0x9C74, 0x04F1 |
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284 , 0x459D, 0x7059, 0x6471, 0x8720, 0x865B, 0xCF65, 0xE62D, 0xA802 |
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285 , 0x1B60, 0x25AD, 0xAEB0, 0xB9F6, 0x1C46, 0x6169, 0x3440, 0x7E0F |
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286 , 0x5547, 0xA323, 0xDD51, 0xAF3A, 0xC35C, 0xF9CE, 0xBAC5, 0xEA26 |
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287 , 0x2C53, 0x0D6E, 0x8528, 0x8409, 0xD3DF, 0xCDF4, 0x4181, 0x4D52 |
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288 , 0x6ADC, 0x37C8, 0x6CC1, 0xABFA, 0x24E1, 0x7B08, 0x0CBD, 0xB14A |
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289 , 0x7888, 0x958B, 0xE363, 0xE86D, 0xE9CB, 0xD5FE, 0x3B00, 0x1D39 |
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290 , 0xF2EF, 0xB70E, 0x6658, 0xD0E4, 0xA677, 0x72F8, 0xEB75, 0x4B0A |
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291 , 0x3144, 0x50B4, 0x8FED, 0x1F1A, 0xDB99, 0x8D33, 0x9F11, 0x8314 |
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292 }; |
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293 #endif |
116 | 294 |
167 | 295 ////////////////////////////////////////////////////////////////////////////// |
296 ////////////////////////////////////////////////////////////////////////////// | |
297 ////////////////////////////// THE SUBROUTINES /////////////////////////////// | |
298 ////////////////////////////////////////////////////////////////////////////// | |
299 ////////////////////////////////////////////////////////////////////////////// | |
300 // | |
116 | 301 // all new in v.102 |
302 // moved from 0x0D000 to 0x0C000 in v.108 | |
601
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303 #ifndef UNIX |
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304 # pragma code p2_deco = 0x0C000 |
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305 #endif |
116 | 306 |
167 | 307 ////////////////////////////////////////////////////////////////////////////// |
308 ////////////////////////////////////////////////////////////////////////////// | |
309 /////////////////////// U T I L I T I E S ///////////////////////////////// | |
310 ////////////////////////////////////////////////////////////////////////////// | |
311 ////////////////////////////////////////////////////////////////////////////// | |
312 | |
235 | 313 ////////////////////////////////////////////////////////////////////////////// |
257
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314 // Bump to blue-screen when an assert is wrong |
235 | 315 #ifdef __DEBUG |
316 void assert_failed(PARAMETER short int line) | |
317 { | |
318 extern void PLED_resetdebugger(void); | |
319 extern unsigned short temp10; | |
320 | |
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321 temp10 = line; // Show source line number as stack depth. |
235 | 322 PLED_resetdebugger(); |
323 } | |
324 #endif | |
257
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325 |
235 | 326 ////////////////////////////////////////////////////////////////////////////// |
327 // When calling C code from ASM context, the data stack pointer and | |
328 // frames should be reset. Bank8 is used by stack, when not doing hashing. | |
329 | |
330 #ifdef CROSS_COMPILE | |
331 # define RESET_C_STACK | |
332 #else | |
333 # ifdef __DEBUG | |
334 # define RESET_C_STACK fillDataStack(); | |
335 void fillDataStack(void) | |
336 { | |
337 _asm | |
338 LFSR 1,C_STACK | |
339 MOVLW 0xCC | |
340 loop: MOVWF POSTINC1,0 | |
341 TSTFSZ FSR1L,0 | |
342 BRA loop | |
343 | |
344 LFSR 1,C_STACK | |
345 LFSR 2,C_STACK | |
346 _endasm | |
347 } | |
348 # else | |
349 # define RESET_C_STACK \ | |
350 _asm \ | |
351 LFSR 1, C_STACK \ | |
352 LFSR 2, C_STACK \ | |
353 _endasm | |
354 # endif | |
355 #endif | |
356 | |
357 ////////////////////////////////////////////////////////////////////////////// | |
257
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358 // Read CF values from the C code. |
235 | 359 |
488 | 360 #ifdef CROSS_COMPILE |
361 // Full description of the OSTC EEPROM map, including CF values. | |
362 # include "OSTC_eeprom.h" | |
363 #endif | |
364 | |
203 | 365 static short read_custom_function(PARAMETER unsigned char cf) |
167 | 366 { |
184 | 367 #ifdef CROSS_COMPILE |
564 | 368 return (cf & 32) ? eeprom.bank1_CF[cf-32].value.lo |
369 : eeprom.bank0_CF[cf ].value.lo; | |
184 | 370 #else |
167 | 371 extern unsigned char hi, lo; |
372 extern void getcustom15(); | |
373 _asm | |
374 movff cf,WREG | |
375 call getcustom15,0 | |
376 movff lo,PRODL | |
377 movff hi,PRODH | |
378 _endasm | |
184 | 379 #endif |
167 | 380 } |
381 | |
382 ////////////////////////////////////////////////////////////////////////////// | |
257
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383 // Fast subroutine to read RTC timer 3. |
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384 // Note: result is in 1/32 of msecs. |
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385 static unsigned short tmr3(void) |
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386 { |
261 | 387 #ifndef CROSS_COMPILE |
257
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388 _asm |
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389 movff 0xfb2,PRODL // TMR3L |
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390 movff 0xfb3,PRODH // TMR3H |
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391 _endasm // result in PRODH:PRODL. |
261 | 392 #else |
393 return 0; | |
394 #endif | |
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395 } |
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396 |
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397 ////////////////////////////////////////////////////////////////////////////// |
258 | 398 // read buhlmann tables A and B for compatriment ci |
399 // | |
400 static void read_buhlmann_coefficients(void) | |
165 | 401 { |
184 | 402 #ifndef CROSS_COMPILE |
167 | 403 // Note: we don't use far rom pointer, because the |
338 | 404 // 24 bits is too complex, hence we have to set |
167 | 405 // the UPPER page ourself... |
406 // --> Set zero if tables are moved to lower pages ! | |
407 _asm | |
408 movlw 1 | |
409 movwf TBLPTRU,0 | |
410 _endasm | |
184 | 411 #endif |
258 | 412 |
564 | 413 assert( ci < NUM_COMP ); |
338 | 414 |
415 // Use an interleaved array (AoS) to access coefficients with a | |
416 // single addressing. | |
417 { | |
418 overlay rom const float* ptr = &buhlmann_ab[4*ci]; | |
419 var_N2_a = *ptr++; | |
420 var_N2_b = *ptr++; | |
421 var_He_a = *ptr++; | |
422 var_He_b = *ptr++; | |
423 } | |
258 | 424 } |
425 | |
426 ////////////////////////////////////////////////////////////////////////////// | |
427 // read buhlmann tables for compatriment ci | |
428 // If period == 0 : 2sec interval | |
429 // 1 : 1 min interval | |
430 // 2 : 10 min interval. | |
431 static void read_buhlmann_times(PARAMETER char period) | |
432 { | |
433 #ifndef CROSS_COMPILE | |
434 // Note: we don't use far rom pointer, because the | |
435 // 24 bits is to complex, hence we have to set | |
436 // the UPPER page ourself... | |
437 // --> Set zero if tables are moved to lower pages ! | |
438 _asm | |
439 movlw 1 | |
440 movwf TBLPTRU,0 | |
441 _endasm | |
442 #endif | |
338 | 443 |
564 | 444 assert( ci < NUM_COMP ); |
258 | 445 |
165 | 446 // Integration intervals. |
167 | 447 switch(period) |
165 | 448 { |
449 case 0: //---- 2 sec ----------------------------------------------------- | |
338 | 450 { |
451 overlay rom const float* ptr = &e2secs[2*ci]; | |
452 var_N2_e = *ptr++; | |
453 var_He_e = *ptr++; | |
454 } | |
165 | 455 break; |
456 | |
457 case 1: //---- 1 min ----------------------------------------------------- | |
338 | 458 { |
459 overlay rom const float* ptr = &e1min[2*ci]; | |
460 var_N2_e = *ptr++; | |
461 var_He_e = *ptr++; | |
462 } | |
165 | 463 break; |
464 | |
465 case 2: //---- 10 min ---------------------------------------------------- | |
338 | 466 { |
467 overlay rom const float* ptr = &e10min[2*ci]; | |
468 var_N2_e = *ptr++; | |
469 var_He_e = *ptr++; | |
470 } | |
165 | 471 break; |
197 | 472 |
473 default: | |
527 | 474 assert(0); // Never go there... |
165 | 475 } |
476 } | |
477 | |
478 ////////////////////////////////////////////////////////////////////////////// | |
509 | 479 // read buhlmann tables for compatriment ci |
480 // | |
481 static void read_buhlmann_ht(void) | |
482 { | |
483 | |
484 #ifndef CROSS_COMPILE | |
485 // Note: we don't use far rom pointer, because the | |
486 // 24 bits is to complex, hence we have to set | |
487 // the UPPER page ourself... | |
488 // --> Set zero if tables are moved to lower pages ! | |
489 _asm | |
490 movlw 1 | |
491 movwf TBLPTRU,0 | |
492 _endasm | |
493 #endif | |
494 | |
564 | 495 assert( ci < NUM_COMP ); |
509 | 496 { |
497 overlay rom const float* ptr = &buhlmann_ht[2*ci]; | |
498 var_N2_ht = *ptr++; | |
499 var_He_ht = *ptr++; | |
500 } | |
501 | |
502 assert( 4.0 <= var_N2_ht && var_N2_ht <= 635.0 ); | |
503 assert( 1.5099 <= var_He_ht && var_He_ht <= 240.03 ); | |
504 } | |
505 | |
506 ////////////////////////////////////////////////////////////////////////////// | |
340
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507 // calc_nextdecodepth |
165 | 508 // |
116 | 509 // new in v.102 |
165 | 510 // |
116 | 511 // INPUT, changing during dive: |
509 | 512 // temp_deco |
192 | 513 // low_depth |
167 | 514 // |
116 | 515 // INPUT, fixed during dive: |
167 | 516 // pres_surface |
517 // GF_delta | |
518 // GF_high | |
519 // GF_low | |
171 | 520 // char_I_depth_last_deco |
167 | 521 // float_deco_distance |
522 // | |
241 | 523 // RETURN TRUE iff a stop is needed. |
524 // | |
116 | 525 // OUTPUT |
171 | 526 // locked_GF_step |
167 | 527 // temp_depth_limt |
192 | 528 // low_depth |
167 | 529 // |
241 | 530 static unsigned char calc_nextdecodepth(void) |
167 | 531 { |
241 | 532 //--- Max ascent speed --------------------------------------------------- |
533 // Recompute leading gas limit, at current depth: | |
317 | 534 overlay float depth = (temp_deco - pres_surface) * BAR_TO_METER; |
241 | 535 |
536 // At most, ascent 1 minute, at 10m/min == 10.0 m. | |
302 | 537 overlay float min_depth = (depth > 10.0) ? (depth - 10.0) : 0.0; |
241 | 538 |
539 // Do we need to stop at current depth ? | |
540 overlay unsigned char need_stop = 0; | |
541 | |
542 assert( depth >= -0.2 ); // Allow for 200mbar of weather change. | |
543 | |
212 | 544 //---- ZH-L16 + GRADIENT FACTOR model ------------------------------------ |
509 | 545 if( char_I_deco_model != 0 ) |
116 | 546 { |
562 | 547 overlay unsigned char first_stop = 0; |
548 overlay float p; | |
549 | |
567 | 550 sim_limit( GF_low ); |
562 | 551 p = sim_lead_tissue_limit - pres_surface; |
552 if( p <= 0.0f ) | |
553 goto no_deco_stop; // We can surface directly... | |
512
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554 |
562 | 555 p *= BAR_TO_METER; |
556 if( p < min_depth ) | |
557 goto no_deco_stop; // First stop is higher than 1' ascent. | |
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558 |
562 | 559 first_stop = 3 * (short)(0.99999 + p*0.333333); |
560 assert( first_stop < 128 ); | |
561 | |
562 // Apply correction for the shallowest stop. | |
563 if( first_stop == 3 ) // new in v104 | |
564 first_stop = char_I_depth_last_deco; // Use last 3m..6m instead. | |
171 | 565 |
562 | 566 // Store the deepest point needing a deco stop as the LOW reference for GF. |
567 // NOTE: following stops will be validated using this LOW-HIGH gf scale, | |
568 // so if we want to keep coherency, we should not validate this stop | |
568 | 569 // yet, but apply the search to it, as for all the following stops afterward. |
562 | 570 if( first_stop > low_depth ) |
571 { | |
572 low_depth = first_stop; | |
568 | 573 locked_GF_step = GF_delta / first_stop; |
562 | 574 } |
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575 |
562 | 576 // We have a stop candidate. |
577 // But maybe ascending to the next stop will diminish the constraint, | |
578 // because the GF might decrease more than the preassure gradient... | |
579 while(first_stop > 0) | |
580 { | |
581 overlay unsigned char next_stop; // Next depth (0..90m) | |
582 overlay float pres_stop; // Next pressure (bar) | |
171 | 583 |
562 | 584 // Check max speed, or reaching surface. |
585 if( first_stop <= min_depth ) | |
586 goto no_deco_stop; | |
171 | 587 |
562 | 588 if( first_stop <= char_I_depth_last_deco ) // new in v104 |
589 next_stop = 0; | |
590 else if( first_stop == 6 ) | |
591 next_stop = char_I_depth_last_deco; | |
592 else | |
593 next_stop = first_stop - 3; // Index of next (upper) stop. | |
594 | |
595 // Just a check we are indeed above LOW ref. | |
596 assert( next_stop < low_depth ); | |
241 | 597 |
562 | 598 // Total preassure at the new stop candidate: |
599 pres_stop = next_stop * METER_TO_BAR | |
600 + pres_surface; | |
167 | 601 |
562 | 602 // Keep GF_low until a first stop depth is found: |
603 sim_limit( GF_high - next_stop * locked_GF_step ); | |
192 | 604 |
562 | 605 // Check upper limit (lowest pressure tolerated): |
606 if( sim_lead_tissue_limit >= pres_stop ) // check if ascent to next deco stop is ok | |
607 goto deco_stop_found; | |
608 | |
609 // Else, validate that stop and loop... | |
610 first_stop = next_stop; | |
611 } | |
612 assert( first_stop == 0 ); | |
171 | 613 |
562 | 614 no_deco_stop: |
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615 temp_depth_limit = min_depth; |
562 | 616 goto done; |
212 | 617 |
562 | 618 // next stop is the last validated depth found, aka first_stop |
619 deco_stop_found: | |
620 need_stop = 1; // Hit. | |
621 temp_depth_limit = first_stop; // Stop depth, in meter. | |
622 | |
623 done: | |
624 ; | |
116 | 625 } |
167 | 626 else //---- ZH-L16 model ------------------------------------------------- |
116 | 627 { |
192 | 628 overlay float pres_gradient; |
629 | |
630 // Original model | |
116 | 631 // optimized in v.101 |
171 | 632 // char_I_depth_last_deco included in v.101 |
116 | 633 |
192 | 634 // Compute sim_lead_tissue_limit too, but just once. |
635 sim_limit(1.0); | |
636 | |
637 pres_gradient = sim_lead_tissue_limit - pres_surface; | |
167 | 638 if (pres_gradient >= 0) |
116 | 639 { |
317 | 640 pres_gradient *= BAR_TO_METER/3; // Bar --> stop number; |
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641 temp_depth_limit = 3 * (short) (pres_gradient + 0.99); // --> metre : depth for deco |
241 | 642 need_stop = 1; // Hit. |
643 | |
644 // Implement last stop at 4m/5m/6m... | |
645 if( temp_depth_limit == 3 ) | |
646 temp_depth_limit = char_I_depth_last_deco; | |
171 | 647 } |
116 | 648 else |
241 | 649 temp_depth_limit = 0; |
171 | 650 } |
212 | 651 |
217 | 652 //---- Check gas change -------------------------------------------------- |
241 | 653 need_stop |= gas_switch_deepest(); // Update temp_depth_limit if there is a change, |
654 | |
655 return need_stop; | |
167 | 656 } |
116 | 657 |
167 | 658 ////////////////////////////////////////////////////////////////////////////// |
169
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659 // copy_deco_table |
167 | 660 // |
169
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661 // Buffer the stops, once computed, so we can continue to display them |
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662 // while computing the next set. |
167 | 663 // |
169
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664 static void copy_deco_table(void) |
116 | 665 { |
169
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666 // Copy depth of the first (deepest) stop, because when reversing |
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667 // order, it will be hard to find... |
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668 char_O_first_deco_depth = internal_deco_depth[0] & 0x7F; |
169
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669 char_O_first_deco_time = internal_deco_time [0]; |
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670 |
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671 if( read_custom_function(54) & 1 ) //---- Should we reverse table ? ------ |
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672 { |
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673 overlay unsigned char x, y; |
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674 |
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675 //---- First: search the first non-null depth |
339 | 676 for(x=(NUM_STOPS-1); x != 0; --x) |
169
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677 if( internal_deco_depth[x] != 0 ) break; |
116 | 678 |
169
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679 //---- Second: copy to output table (in reverse order) |
338 | 680 for(y=0; y<NUM_STOPS; y++, --x) |
169
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681 { |
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682 char_O_deco_depth[y] = internal_deco_depth[x]; |
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683 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
169
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684 char_O_deco_time [y] = internal_deco_time [x]; |
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685 |
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686 // Stop only once the last transfer is done. |
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687 if( x == 0 ) break; |
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688 } |
116 | 689 |
169
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690 //---- Third: fill table end with null |
339 | 691 for(y++; y<NUM_STOPS; y++) |
169
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692 { |
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693 char_O_deco_time [y] = 0; |
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694 char_O_deco_depth[y] = 0; |
630
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695 char_O_deco_time_for_log[y] = 0; |
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696 } |
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697 } |
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698 else //---- Straight copy ------------------------------------------------ |
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699 { |
630
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700 overlay unsigned char x, y; |
167 | 701 |
339 | 702 for(x=0; x<NUM_STOPS; x++) |
169
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703 { |
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704 char_O_deco_depth[x] = internal_deco_depth[x]; |
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705 char_O_deco_time [x] = internal_deco_time [x]; |
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706 } |
630
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707 |
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708 //Now fill the char_O_deco_time_for_log array |
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709 //---- First: search the first non-null depth |
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710 for(x=(NUM_STOPS-1); x != 0; --x) |
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711 if( internal_deco_depth[x] != 0 ) break; |
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712 |
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713 //---- Second: copy to output table (in reverse order) |
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714 for(y=0; y<NUM_STOPS; y++, --x) |
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715 { |
633
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716 char_O_deco_time_for_log[y] = internal_deco_time [x]; |
630
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717 |
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718 // Stop only once the last transfer is done. |
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719 if( x == 0 ) break; |
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720 } |
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721 |
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722 //---- Third: fill table end with null |
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723 for(y++; y<NUM_STOPS; y++) |
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724 { |
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725 char_O_deco_time_for_log [y] = 0; |
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726 } |
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727 |
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728 } |
167 | 729 } |
116 | 730 |
167 | 731 ////////////////////////////////////////////////////////////////////////////// |
116 | 732 // temp_tissue_safety // |
167 | 733 // |
116 | 734 // outsourced in v.102 |
167 | 735 // |
736 // Apply safety factors for brand ZH-L16 model. | |
737 // | |
738 static void temp_tissue_safety(void) | |
116 | 739 { |
197 | 740 assert( 0.0 < float_desaturation_multiplier && float_desaturation_multiplier <= 1.0 ); |
741 assert( 1.0 <= float_saturation_multiplier && float_saturation_multiplier <= 2.0 ); | |
742 | |
167 | 743 if( char_I_deco_model == 0 ) |
116 | 744 { |
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745 if( temp_tissue < 0.0 ) |
126 | 746 temp_tissue *= float_desaturation_multiplier; |
116 | 747 else |
126 | 748 temp_tissue *= float_saturation_multiplier; |
116 | 749 } |
167 | 750 } |
116 | 751 |
167 | 752 ////////////////////////////////////////////////////////////////////////////// |
753 ////////////////////////////////////////////////////////////////////////////// | |
116 | 754 // ** THE JUMP-IN CODE ** |
755 // ** for the asm code ** | |
167 | 756 ////////////////////////////////////////////////////////////////////////////// |
757 ////////////////////////////////////////////////////////////////////////////// | |
122
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758 |
167 | 759 ////////////////////////////////////////////////////////////////////////////// |
169
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760 // Called every 2 seconds during diving. |
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761 // update tissues every time. |
184 | 762 // |
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763 // Every 6 seconds (or slower when TTS > 16): |
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764 // - update deco table (char_O_deco_time/depth) with new values. |
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765 // - update ascent time, |
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766 // - set status to zero (so we can check there is new results). |
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767 // |
116 | 768 void deco_calc_hauptroutine(void) |
769 { | |
122
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770 RESET_C_STACK |
116 | 771 calc_hauptroutine(); |
772 int_O_desaturation_time = 65535; | |
773 } | |
774 | |
167 | 775 ////////////////////////////////////////////////////////////////////////////// |
184 | 776 // Reset decompression model: |
777 // + Set all tissues to equilibrium with Air at ambient pressure. | |
778 // + Reset last stop to 0m | |
779 // + Reset all model output. | |
116 | 780 void deco_clear_tissue(void) |
781 { | |
122
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782 RESET_C_STACK |
116 | 783 clear_tissue(); |
784 } | |
785 | |
167 | 786 ////////////////////////////////////////////////////////////////////////////// |
278 | 787 // Called every 1 min during decoplanning. |
788 // Update tissues for 1 min. | |
789 // | |
790 void deco_calc_tissue(void) | |
791 { | |
792 RESET_C_STACK | |
793 calc_hauptroutine_update_tissues(); | |
794 } | |
795 | |
796 ////////////////////////////////////////////////////////////////////////////// | |
167 | 797 |
116 | 798 void deco_calc_wo_deco_step_1_min(void) |
799 { | |
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800 RESET_C_STACK |
116 | 801 calc_wo_deco_step_1_min(); |
802 deco_calc_desaturation_time(); | |
803 } | |
804 | |
167 | 805 ////////////////////////////////////////////////////////////////////////////// |
806 | |
368 | 807 void deco_calc_dive_interval(void) |
808 { | |
809 RESET_C_STACK | |
810 calc_dive_interval(); | |
811 } | |
812 | |
241 | 813 ////////////////////////////////////////////////////////////////////////////// |
814 // Find current gas in the list (if any). | |
815 // | |
513 | 816 // Input: char_I_current_gas = 1..6 |
241 | 817 // |
513 | 818 // Output: sim_gas_last_depth = 0..5, temp_depth_limit. |
241 | 819 // |
820 static void gas_switch_find_current(void) | |
821 { | |
513 | 822 assert( 0 < char_I_current_gas && char_I_current_gas <= (NUM_GAS+1) ); |
247
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823 |
388 | 824 if( char_I_current_gas <= NUM_GAS ) // Gas1..Gas5 |
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825 { |
388 | 826 sim_gas_last_used = char_I_current_gas; |
827 | |
828 // Note: if current is first gas, we must find it, but not set | |
829 // last depth change to surface. | |
830 if( char_I_deco_gas_change[sim_gas_last_used-1] ) | |
831 sim_gas_last_depth = char_I_deco_gas_change[sim_gas_last_used-1]; | |
241 | 832 } |
388 | 833 else |
834 sim_gas_last_used = 0; // Gas 6 = manual set | |
241 | 835 } |
836 | |
167 | 837 ////////////////////////////////////////////////////////////////////////////// |
217 | 838 // Find deepest available gas. |
201 | 839 // |
241 | 840 // Input: temp_depth_limit, |
841 // deco_gas_change[] | |
842 // sim_gas_delay, sim_gas_depth_used, sim_dive_mins. | |
212 | 843 // |
241 | 844 // RETURNS TRUE if a stop is needed for gas switch. |
845 // | |
846 // Output: temp_depth_limit, sim_gas_delay, sim_gas_depth_used IFF the is a switch. | |
212 | 847 // |
241 | 848 // NOTE: might be called from bottom (when sim_gas_delay and sim_gas_depth_used |
849 // are null), or during the ascent to make sure we are not passing a | |
850 // stop (in which case both can be already set). | |
851 // | |
852 static unsigned char gas_switch_deepest(void) | |
201 | 853 { |
241 | 854 overlay unsigned char switch_deco = 0, switch_last = 0; |
201 | 855 |
856 if (char_I_const_ppO2 == 0) | |
857 { | |
225 | 858 overlay unsigned char j; |
859 | |
241 | 860 // Loop over all enabled gas, to find the deepest one, |
340
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861 // above last used gas, but below temp_depth_limit. |
338 | 862 for(j=0; j<NUM_GAS; ++j) |
225 | 863 { |
241 | 864 // Gas not (yet) allowed ? Skip ! |
865 if( temp_depth_limit > deco_gas_change[j] ) | |
866 continue; | |
867 | |
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868 // Gas deeper (or equal) than the current one ? Skip ! |
241 | 869 if( sim_gas_last_depth && deco_gas_change[j] >= sim_gas_last_depth ) |
870 continue; | |
871 | |
872 // First, or deeper ? | |
247
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873 if( switch_deco < deco_gas_change[j] ) |
241 | 874 { |
875 switch_deco = deco_gas_change[j]; | |
388 | 876 switch_last = j+1; // 1..5 |
241 | 877 } |
225 | 878 } |
201 | 879 } |
880 | |
203 | 881 // If there is a better gas available |
241 | 882 if( switch_deco ) |
201 | 883 { |
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884 unsigned char delay = read_custom_function(55); |
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885 |
241 | 886 assert( !sim_gas_last_depth || sim_gas_last_depth > switch_deco ); |
201 | 887 |
241 | 888 // Should restart gas-switch delay only when gas do changes... |
889 assert( sim_gas_delay <= sim_dive_mins ); | |
217 | 890 |
241 | 891 sim_gas_last_depth = switch_deco; |
892 sim_gas_last_used = switch_last; | |
555
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893 sim_gas_delay = delay |
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894 + sim_dive_mins; |
217 | 895 |
555
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896 if( delay ) |
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897 { |
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898 temp_depth_limit = switch_deco; |
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899 return 1; |
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900 } |
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901 else |
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902 return 0; |
217 | 903 } |
904 | |
241 | 905 sim_gas_delay = 0; |
906 return 0; | |
217 | 907 } |
908 | |
909 ////////////////////////////////////////////////////////////////////////////// | |
910 // Calculate gas switches | |
911 // | |
912 // | |
913 // Input: N2_ratio, He_ratio. | |
914 // sim_gas_last_used | |
915 // | |
916 // Output: calc_N2_ratio, calc_He_ratio | |
917 // | |
241 | 918 static void gas_switch_set(void) |
217 | 919 { |
564 | 920 assert( sim_gas_last_used <= NUM_GAS ); |
217 | 921 |
388 | 922 if( sim_gas_last_used == 0 ) // Gas6 = manualy set gas. |
224 | 923 { |
924 calc_N2_ratio = N2_ratio; | |
925 calc_He_ratio = He_ratio; | |
926 } | |
927 else | |
928 { | |
929 calc_N2_ratio = char_I_deco_N2_ratio[sim_gas_last_used-1] * 0.01; | |
930 calc_He_ratio = char_I_deco_He_ratio[sim_gas_last_used-1] * 0.01; | |
217 | 931 } |
201 | 932 |
933 assert( 0.0 <= calc_N2_ratio && calc_N2_ratio <= 0.95 ); | |
934 assert( 0.0 <= calc_He_ratio && calc_He_ratio <= 0.95 ); | |
935 assert( (calc_N2_ratio + calc_He_ratio) <= 1.00 ); | |
936 } | |
937 | |
938 ////////////////////////////////////////////////////////////////////////////// | |
939 // | |
212 | 940 // Input: calc_N2_ratio, calc_He_ratio : simulated gas mix. |
509 | 941 // temp_deco : simulated respiration pressure |
276 | 942 // float_deco_distance : security factor. |
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943 // Water-vapor pressure inside limbs (ppWater). |
212 | 944 // |
236 | 945 // Output: ppN2, ppHe. |
212 | 946 // |
947 static void sim_alveolar_presures(void) | |
201 | 948 { |
212 | 949 overlay float deco_diluent = temp_deco; // new in v.101 |
950 | |
276 | 951 // Take deco offset into account, but not at surface. |
952 // Note: this should be done on ambiant pressure, hence before | |
953 // computing the diluant partial pressure... | |
954 if( deco_diluent > pres_surface ) | |
955 deco_diluent += float_deco_distance; | |
956 | |
212 | 957 //---- CCR mode : deco gas switch ? -------------------------------------- |
276 | 958 if( char_I_const_ppO2 != 0 ) |
201 | 959 { |
276 | 960 // In CCR mode, use calc_XX_ratio instead of XX_ratio. |
961 // Note: PPO2 and ratios are known outside the lumbs, so there is no | |
310
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962 // ppWater in the equations below: |
321 | 963 deco_diluent -= const_ppO2; |
276 | 964 deco_diluent /= calc_N2_ratio + calc_He_ratio; |
212 | 965 |
966 if (deco_diluent > temp_deco) | |
967 deco_diluent = temp_deco; | |
201 | 968 } |
969 | |
310
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970 if( deco_diluent > ppWater ) |
201 | 971 { |
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972 ppN2 = calc_N2_ratio * (deco_diluent - ppWater); |
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973 ppHe = calc_He_ratio * (deco_diluent - ppWater); |
201 | 974 } |
975 else | |
976 { | |
236 | 977 ppN2 = 0.0; |
201 | 978 ppHe = 0.0; |
979 } | |
236 | 980 assert( 0.0 <= ppN2 && ppN2 < 14.0 ); |
201 | 981 assert( 0.0 <= ppHe && ppHe < 14.0 ); |
982 } | |
983 | |
984 ////////////////////////////////////////////////////////////////////////////// | |
167 | 985 // clear_tissue |
986 // | |
165 | 987 // optimized in v.101 (var_N2_a) |
167 | 988 // |
989 // preload tissues with standard pressure for the given ambient pressure. | |
990 // Note: fixed N2_ratio for standard air. | |
201 | 991 // |
167 | 992 static void clear_tissue(void) |
116 | 993 { |
511
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994 overlay float p; |
116 | 995 flag_in_divemode = 0; |
996 | |
167 | 997 // Kludge: the 0.0002 of 0.7902 are missing with standard air. |
998 N2_ratio = 0.7902; | |
212 | 999 pres_respiration = int_I_pres_respiration * 0.001; |
164 | 1000 |
511
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1001 p = N2_ratio * (pres_respiration - ppWater); |
338 | 1002 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1003 { |
511
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1004 // cycle through the 16 Bühlmann N2 tissues |
339 | 1005 pres_tissue_N2[ci] = p; |
197 | 1006 |
1007 // cycle through the 16 Bühlmann tissues for Helium | |
339 | 1008 pres_tissue_He[ci] = 0.0; |
511
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1009 } |
116 | 1010 |
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1011 clear_deco_table(); |
126 | 1012 char_O_deco_status = 0; |
1013 char_O_nullzeit = 0; | |
168 | 1014 int_O_ascenttime = 0; |
126 | 1015 char_O_gradient_factor = 0; |
1016 char_O_relative_gradient_GF = 0; | |
258 | 1017 |
1018 calc_lead_tissue_limit = 0.0; | |
1019 char_O_gtissue_no = 0; | |
167 | 1020 } |
116 | 1021 |
167 | 1022 ////////////////////////////////////////////////////////////////////////////// |
1023 // calc_hauptroutine | |
1024 // | |
1025 // this is the major code in dive mode calculates: | |
116 | 1026 // the tissues, |
167 | 1027 // the bottom time, |
1028 // and simulates the ascend with all deco stops. | |
171 | 1029 // |
1030 // The deco_state sequence is : | |
1031 // 3 (at surface) | |
1032 // +---> 0 : calc nullzeit | |
1033 // | 2 : simulate ascent to first stop (at 10m/min, less that 16x 1min simu) | |
1034 // | +-> 1 : simulate up to 16min of stops. | |
1035 // | +------< not finished | |
1036 // +--------< finish | |
1037 // | |
312
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1038 // Added steps 6,5 for @+5 calculation: |
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1039 // 6 = ascent to first stop (same as 2), except continue to 7 |
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1040 // 7 = same as 1, except loop to 7. |
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1041 // |
167 | 1042 static void calc_hauptroutine(void) |
116 | 1043 { |
241 | 1044 static unsigned char backup_gas_used = 0; |
1045 static unsigned char backup_gas_depth = 0; | |
217 | 1046 static unsigned char backup_gas_delay = 0; |
186 | 1047 |
116 | 1048 calc_hauptroutine_data_input(); |
1049 | |
1050 calc_hauptroutine_update_tissues(); | |
1051 calc_gradient_factor(); | |
1052 | |
167 | 1053 // toggle between calculation for nullzeit (bottom time), |
1054 // deco stops | |
1055 // and more deco stops (continue) | |
1056 switch( char_O_deco_status ) | |
116 | 1057 { |
186 | 1058 case 3: //---- At surface: start a new dive ------------------------------ |
1059 clear_deco_table(); | |
1060 copy_deco_table(); | |
200 | 1061 int_O_ascenttime = 0; // Reset DTR. |
323 | 1062 int_O_extra_ascenttime = 0; |
200 | 1063 char_O_nullzeit = 0; // Reset bottom time. |
278 | 1064 char_O_deco_status = 0; // Calc bottom-time/nullzeit next iteration. |
201 | 1065 |
217 | 1066 // Values that should be reset just once for the full real dive. |
1067 // This is used to record the lowest stop for the whole dive, | |
1068 // Including ACCROSS all simulated ascent. | |
567 | 1069 low_depth = 0; |
1070 locked_GF_step = 0.0; | |
217 | 1071 |
1072 // Reset gas switch history. | |
241 | 1073 backup_gas_used = sim_gas_last_used = 0; |
1074 backup_gas_depth = sim_gas_last_depth = 0; | |
217 | 1075 backup_gas_delay = sim_gas_delay = 0; |
203 | 1076 sim_dive_mins = 0; |
1077 break; | |
186 | 1078 |
167 | 1079 case 0: //---- bottom time ----------------------------------------------- |
312
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1080 default: |
509 | 1081 gas_switch_find_current(); // Lookup for current gas & time. |
1082 gas_switch_set(); // setup calc_ratio's | |
1083 | |
167 | 1084 calc_nullzeit(); |
534
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1085 if( char_O_nullzeit > 0 ) // Some NDL time left ? |
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1086 { |
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1087 char_O_deco_status = 0; // YES: recalc ndl next time. |
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1088 clear_deco_table(); // Also clear stops ! |
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1089 copy_deco_table(); |
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1090 char_O_deco_last_stop = 0; // And last stop (OSTC menu anim) |
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1091 } |
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1092 else |
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1093 char_O_deco_status = 2; // NO: calc ascent next time. |
186 | 1094 break; |
1095 | |
1096 case 2: //---- Simulate ascent to first stop ----------------------------- | |
312
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1097 case 6: // @+5min variation |
203 | 1098 // Check proposed gas at begin of ascent simulation |
247
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1099 sim_dive_mins = int_I_divemins; // Init current time. |
241 | 1100 |
532 | 1101 gas_switch_find_current(); // Lookup for current gas & time. |
1102 gas_switch_set(); // setup calc_ratio's | |
1103 | |
247
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1104 backup_gas_used = sim_gas_last_used; // And save for later simu steps. |
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1105 backup_gas_depth = sim_gas_last_depth; // And save for later simu steps. |
203 | 1106 backup_gas_delay = sim_gas_delay; |
186 | 1107 |
1108 sim_ascent_to_first_stop(); | |
201 | 1109 |
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1110 // Calc stops next time (deco or gas switch). |
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1111 char_O_deco_status = 1 | ( char_O_deco_status & 4 ); |
167 | 1112 break; |
169
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1113 |
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1114 case 1: //---- Simulate stops -------------------------------------------- |
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1115 case 5: // @+5 variation. |
167 | 1116 calc_hauptroutine_calc_deco(); |
186 | 1117 |
1118 // If simulation is finished, restore the GF low reference, so that | |
1119 // next ascent simulation is done from the current depth: | |
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1120 if( (char_O_deco_status & 3) == 0 ) |
186 | 1121 { |
241 | 1122 sim_gas_last_used = backup_gas_used; |
1123 sim_gas_last_depth = backup_gas_depth; | |
247
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1124 sim_gas_delay = backup_gas_delay; |
186 | 1125 } |
167 | 1126 break; |
116 | 1127 } |
167 | 1128 |
116 | 1129 } |
1130 | |
167 | 1131 ////////////////////////////////////////////////////////////////////////////// |
1132 // calc_hauptroutine_data_input | |
1133 // | |
1134 // Reset all C-code dive parameters from their ASM-code values. | |
1135 // Detect gas change condition. | |
1136 // | |
116 | 1137 void calc_hauptroutine_data_input(void) |
1138 { | |
203 | 1139 overlay short int_temp; |
511
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1140 overlay unsigned char g; |
126 | 1141 |
197 | 1142 pres_respiration = int_I_pres_respiration * 0.001; |
1143 pres_surface = int_I_pres_surface * 0.001; | |
1144 N2_ratio = char_I_N2_ratio * 0.01; | |
1145 He_ratio = char_I_He_ratio * 0.01; | |
1146 float_deco_distance = char_I_deco_distance * 0.01; // Get offset is in mbar. | |
116 | 1147 |
126 | 1148 // ____________________________________________________ |
1149 // | |
1150 // _____________ G A S _ C H A N G E S ________________ | |
1151 // ____________________________________________________ | |
1152 | |
212 | 1153 // Keep a margin of 150mbar = 1.50m |
1154 int_temp = (int_I_pres_respiration - int_I_pres_surface) | |
1155 + MBAR_REACH_GASCHANGE_AUTO_CHANGE_OFF; | |
126 | 1156 |
203 | 1157 // Gas are selectable if we did not pass the change depth by more than 1.50m: |
511
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1158 for(g=0; g < NUM_GAS; ++g) |
126 | 1159 { |
511
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1160 deco_gas_change[g] = 0; |
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1161 if(char_I_deco_gas_change[g]) |
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1162 if( int_temp > 100 *(short)char_I_deco_gas_change[g] ) |
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1163 deco_gas_change[g] = char_I_deco_gas_change[g]; |
126 | 1164 } |
116 | 1165 |
197 | 1166 const_ppO2 = char_I_const_ppO2 * 0.01; |
1167 float_desaturation_multiplier = char_I_desaturation_multiplier * 0.01; | |
1168 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; | |
1169 GF_low = char_I_GF_Low_percentage * 0.01; | |
1170 GF_high = char_I_GF_High_percentage * 0.01; | |
126 | 1171 GF_delta = GF_high - GF_low; |
116 | 1172 } |
1173 | |
167 | 1174 ////////////////////////////////////////////////////////////////////////////// |
171 | 1175 // |
1176 // | |
116 | 1177 void calc_hauptroutine_update_tissues(void) |
1178 { | |
197 | 1179 assert( 0.00 <= N2_ratio && N2_ratio <= 1.00 ); |
1180 assert( 0.00 <= He_ratio && He_ratio <= 1.00 ); | |
1181 assert( (N2_ratio + He_ratio) <= 0.95 ); | |
237 | 1182 assert( 0.800 < pres_respiration && pres_respiration < 14.0 ); |
197 | 1183 |
276 | 1184 pres_diluent = pres_respiration; |
307 | 1185 if( char_I_const_ppO2 != 0 ) // new in v.101 |
186 | 1186 { |
322 | 1187 overlay float flush_ppO2 = pres_respiration * (1.0 - N2_ratio - He_ratio); |
1188 | |
276 | 1189 pres_diluent -= const_ppO2; // new in v.101 |
1190 pres_diluent /= N2_ratio + He_ratio; // new in v.101 | |
321 | 1191 if( pres_diluent < 0.0 ) |
1192 pres_diluent = 0.0; | |
276 | 1193 if( pres_diluent > pres_respiration ) // new in v.101 |
1194 pres_diluent = pres_respiration; // new in v.101 | |
307 | 1195 |
321 | 1196 char_O_diluent = (unsigned char)(pres_diluent/pres_respiration*100.0 + 0.5); |
322 | 1197 |
326 | 1198 if( flush_ppO2 > 2.545) flush_ppO2 = 2.55; |
322 | 1199 if( flush_ppO2 < 0.0 ) flush_ppO2 = 0.0; |
1200 char_O_flush_ppO2 = (unsigned char)(flush_ppO2*100.0 + 0.5); | |
186 | 1201 } |
307 | 1202 |
310
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1203 if( pres_diluent > ppWater ) // new in v.101 |
116 | 1204 { |
307 | 1205 overlay float EAD, END; |
1206 | |
310
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1207 ppN2 = N2_ratio * (pres_diluent - ppWater); // changed in v.101 |
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1208 ppHe = He_ratio * (pres_diluent - ppWater); // changed in v.101 |
307 | 1209 |
1210 // EAD : Equivalent Air Dive. Equivalent depth for the same N2 level | |
1211 // with plain air. | |
310
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1212 // ppN2 = 79% * (P_EAD - ppWater) |
307 | 1213 // EAD = (P_EAD - Psurface) * 10 |
310
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1214 // ie: EAD = (ppN2 / 0.7902 + ppWater -Psurface) * 10 |
317 | 1215 EAD = (ppN2 / 0.7902 + ppWater - pres_surface) * BAR_TO_METER; |
307 | 1216 if( EAD < 0.0 || EAD > 245.5 ) EAD = 0.0; |
317 | 1217 char_O_EAD = (unsigned char)(EAD + 0.5); |
307 | 1218 |
1219 // END : Equivalent Narcotic Dive. | |
1220 // Here we count O2 as narcotic too. Hence everything but helium (has a narcosis factor of | |
1221 // 0.23 btw). Hence the formula becomes: | |
310
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1222 // END * BarPerMeter * (1.0 - 0.0) - ppWater + Psurface == Pambient - ppHe - ppWater |
317 | 1223 // ie: END = (Pambient - ppHe - Psurface) * BAR_TO_METER |
307 | 1224 // |
1225 // Source cited: | |
1226 // The Physiology and Medicine of Diving by Peter Bennett and David Elliott, | |
1227 // 4th edition, 1993, W.B.Saunders Company Ltd, London. | |
317 | 1228 END = (pres_respiration - ppHe - pres_surface) * BAR_TO_METER; |
307 | 1229 if( END < 0.0 || END > 245.5 ) END = 0.0; |
317 | 1230 char_O_END = (unsigned char)(END + 0.5); |
116 | 1231 } |
167 | 1232 else // new in v.101 |
116 | 1233 { |
236 | 1234 ppN2 = 0.0; // new in v.101 |
200 | 1235 ppHe = 0.0; // new in v.101 |
307 | 1236 char_O_EAD = char_O_END = 0; |
116 | 1237 } |
1238 | |
1239 if(!char_I_step_is_1min) | |
192 | 1240 calc_tissue(0); |
116 | 1241 else |
192 | 1242 calc_tissue(1); |
186 | 1243 |
192 | 1244 // Calc limit for surface, ie. GF_high. |
258 | 1245 calc_limit(); |
186 | 1246 |
203 | 1247 int_O_gtissue_limit = (short)(calc_lead_tissue_limit * 1000); |
339 | 1248 int_O_gtissue_press = (short)((pres_tissue_N2[char_O_gtissue_no] + pres_tissue_He[char_O_gtissue_no]) * 1000); |
171 | 1249 } |
1250 | |
116 | 1251 |
167 | 1252 ////////////////////////////////////////////////////////////////////////////// |
169
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1253 // Compute stops. |
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1254 // |
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1255 // Note: because this can be very long, break on 16 iterations, and set state |
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1256 // to 0 when finished, or to 1 when needing to continue. |
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1257 // Note: because each iteration might be very long too (~ 66 ms in 1.84beta), |
257
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1258 // break the loop when total time > 512msec. |
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1259 // |
116 | 1260 void calc_hauptroutine_calc_deco(void) |
1261 { | |
169
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1262 overlay unsigned char loop; |
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1263 |
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1264 for(loop = 0; loop < 16; ++loop) |
116 | 1265 { |
257
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1266 // Limit loops to 512ms, using the RTC timer 3: |
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1267 if( tmr3() & (512*32) ) |
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1268 break; |
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1269 |
241 | 1270 // Do not ascent while doing a gas switch ? |
203 | 1271 if( sim_gas_delay <= sim_dive_mins ) |
1272 { | |
241 | 1273 if( calc_nextdecodepth() ) |
1274 { | |
1275 if( temp_depth_limit == 0 ) | |
1276 goto Surface; | |
116 | 1277 |
241 | 1278 //---- We hit a stop at temp_depth_limit --------------------- |
317 | 1279 temp_deco = temp_depth_limit * METER_TO_BAR // Convert to relative bar, |
241 | 1280 + pres_surface; // To absolute. |
471 | 1281 if( !update_deco_table() ) // Adds a one minute stops. |
1282 goto Surface; // Deco table full: abort... | |
241 | 1283 } |
1284 else | |
1285 { | |
1286 //---- No stop ----------------------------------------------- | |
317 | 1287 temp_deco -= (10*METER_TO_BAR); // Ascend 10m, no wait. |
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1288 |
241 | 1289 //---- Finish computations once surface is reached ----------- |
1290 if( temp_deco <= pres_surface ) | |
1291 { | |
1292 Surface: | |
471 | 1293 if( char_O_deco_status == 1 ) // Don't in @+5min variant. |
312
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1294 copy_deco_table(); |
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1295 |
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1296 calc_ascenttime(); |
471 | 1297 char_O_deco_status = 0; // calc nullzeit next time. |
1298 char_O_deco_last_stop = 0; // Surface reached (to animate menu) | |
241 | 1299 return; |
1300 } | |
1301 } | |
212 | 1302 } |
1303 else | |
334
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1304 { |
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1305 // Note: if loop==0, temp_depth_limit might not be already set here. |
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1306 temp_depth_limit = (int)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
471 | 1307 if( !update_deco_table() ) // Just pass one minute. |
1308 goto Surface; // Deco table full: abort... | |
334
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1309 } |
197 | 1310 |
241 | 1311 //---- Then update tissue -------------------------------------------- |
203 | 1312 sim_dive_mins++; // Advance simulated time by 1 minute. |
241 | 1313 gas_switch_set(); // Apply any simulated gas change, once validated. |
212 | 1314 sim_alveolar_presures(); // Updates ppN2 and ppHe. |
192 | 1315 sim_tissue(1); // Simulate compartiments for 1 minute. |
116 | 1316 } |
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1317 |
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1318 // Surface not reached, need more stops... for menu animation. |
278 | 1319 char_O_deco_last_stop = temp_depth_limit; // Reached depth. |
116 | 1320 } |
1321 | |
167 | 1322 ////////////////////////////////////////////////////////////////////////////// |
169
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1323 // Simulation ascention to first deco stop. |
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1324 // |
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1325 // Note: because we ascent with a constant speed (10m/mn, ie. 1bar/mn), |
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1326 // there is no need to break on more that 16 iterations |
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1327 // (or we are already in deep shit). |
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1328 // |
334
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1329 // Input: pres_respiration |
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1330 // Output: temp_deco |
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1331 // |
312
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1332 // if char_O_deco_status indicate @+5 variant, add extra time at current depth, |
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1333 // before ascent. |
169
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1334 void sim_ascent_to_first_stop(void) |
116 | 1335 { |
171 | 1336 update_startvalues(); |
169
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1337 clear_deco_table(); |
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1338 |
200 | 1339 temp_deco = pres_respiration; // Starts from current real depth. |
169
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1340 |
312
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1341 // Are we doing the special @+5min variation ? |
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1342 if(char_O_deco_status & 4) |
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1343 sim_extra_time(); |
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1344 |
212 | 1345 // Do we have a gas switch going on ? |
1346 if( sim_gas_delay > sim_dive_mins ) | |
1347 return; | |
1348 | |
241 | 1349 //---- Loop until first stop, gas switch, or surface is reached ---------- |
169
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1350 for(;;) |
116 | 1351 { |
461 | 1352 overlay float old_deco = temp_deco; // Pamb backup (bars) |
460 | 1353 |
241 | 1354 // Try ascending 1 full minute. |
461 | 1355 temp_deco -= 10*METER_TO_BAR; // 1 min, at 10m/min. ~ 1bar. |
1356 if( temp_deco < pres_surface ) // But don't go over surface. | |
1357 temp_deco = pres_surface; | |
203 | 1358 |
461 | 1359 // Recompute sim_lead_tissue_limit at GF_low (deepest stop), because |
1360 // one minute passed. | |
212 | 1361 sim_limit(GF_low); |
1362 | |
1363 // Did we reach deepest remaining stop ? | |
241 | 1364 if( temp_deco < sim_lead_tissue_limit ) |
212 | 1365 { |
461 | 1366 temp_deco = old_deco; // Restore last correct depth, |
1367 break; // Do no spend a minute more. | |
212 | 1368 } |
1369 | |
203 | 1370 // Did we reach surface ? |
460 | 1371 // NOTE: we should round BEFORE checking surface is reached. |
461 | 1372 temp_depth_limit = (unsigned char)(0.5 + (temp_deco - pres_surface) * BAR_TO_METER); |
1373 if( temp_depth_limit == 0 ) | |
203 | 1374 { |
1375 temp_deco = pres_surface; // Yes: finished ! | |
1376 break; | |
1377 } | |
169
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1378 |
241 | 1379 // Check for gas change below new depth ? |
1380 if( gas_switch_deepest() ) | |
1381 { | |
334
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1382 assert( temp_depth_limit > 0); |
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1383 |
317 | 1384 temp_deco = temp_depth_limit * METER_TO_BAR + pres_surface; |
212 | 1385 break; |
241 | 1386 } |
171 | 1387 |
203 | 1388 sim_dive_mins++; // Advance simulated time by 1 minute. |
241 | 1389 sim_alveolar_presures(); // temp_deco --> ppN2/ppHe |
203 | 1390 sim_tissue(1); // and update tissues for 1 min. |
1391 } | |
167 | 1392 } |
116 | 1393 |
167 | 1394 ////////////////////////////////////////////////////////////////////////////// |
312
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1395 // Simulation extra time at the current depth. |
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1396 // |
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1397 // This routine is used for @+5min feature. |
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1398 void sim_extra_time(void) |
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1399 { |
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1400 overlay unsigned char extra = read_custom_function(58); |
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1401 do { |
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1402 sim_dive_mins++; // Advance simulated time by 1 minute. |
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1403 sim_tissue(1); // and update tissues for 1 min. |
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1404 } while( --extra != 0 ); |
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1405 } |
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1406 |
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1407 ////////////////////////////////////////////////////////////////////////////// |
167 | 1408 // calc_tissue |
1409 // | |
116 | 1410 // optimized in v.101 |
167 | 1411 // |
184 | 1412 static void calc_tissue(PARAMETER unsigned char period) |
116 | 1413 { |
251 | 1414 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1415 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1416 |
338 | 1417 for (ci=0;ci<NUM_COMP;ci++) |
126 | 1418 { |
258 | 1419 read_buhlmann_times(period); // 2 sec or 1 min period. |
116 | 1420 |
126 | 1421 // N2 |
339 | 1422 temp_tissue = (ppN2 - pres_tissue_N2[ci]) * var_N2_e; |
126 | 1423 temp_tissue_safety(); |
339 | 1424 pres_tissue_N2[ci] += temp_tissue; |
165 | 1425 |
126 | 1426 // He |
339 | 1427 temp_tissue = (ppHe - pres_tissue_He[ci]) * var_He_e; |
126 | 1428 temp_tissue_safety(); |
339 | 1429 pres_tissue_He[ci] += temp_tissue; |
192 | 1430 } |
167 | 1431 } |
116 | 1432 |
167 | 1433 ////////////////////////////////////////////////////////////////////////////// |
192 | 1434 // calc_limit |
167 | 1435 // |
192 | 1436 // New in v.111 : separated from calc_tissue(), and depends on GF value. |
167 | 1437 // |
258 | 1438 static void calc_limit(void) |
167 | 1439 { |
192 | 1440 char_O_gtissue_no = 255; |
1441 calc_lead_tissue_limit = 0.0; | |
1442 | |
338 | 1443 for(ci=0; ci<NUM_COMP;ci++) |
192 | 1444 { |
339 | 1445 overlay float N2 = pres_tissue_N2[ci]; |
1446 overlay float He = pres_tissue_He[ci]; | |
293
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1447 overlay float p = N2 + He; |
192 | 1448 |
258 | 1449 read_buhlmann_coefficients(); |
293
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1450 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
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1451 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; |
116 | 1452 |
192 | 1453 // Apply the Eric Baker's varying gradient factor correction. |
1454 // Note: the correction factor depends both on GF and b, | |
1455 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1456 // so that can change who is the leading gas... | |
1457 // Note: Also depends of the GF. So the calcul is different for | |
1458 // GF_low, current GF, or GF_high... | |
1459 // *BUT* calc_tissue() is used to compute bottom time, | |
1460 // hence what would happend at surface, | |
1461 // hence at GF_high. | |
509 | 1462 if( char_I_deco_model != 0 ) |
258 | 1463 p = ( p - var_N2_a * GF_high) * var_N2_b |
1464 / (GF_high + var_N2_b * (1.0 - GF_high)); | |
192 | 1465 else |
1466 p = (p - var_N2_a) * var_N2_b; | |
258 | 1467 if( p < 0.0 ) p = 0.0; |
192 | 1468 |
1469 if( p > calc_lead_tissue_limit ) | |
1470 { | |
1471 char_O_gtissue_no = ci; | |
1472 calc_lead_tissue_limit = p; | |
1473 } | |
1474 } | |
197 | 1475 |
338 | 1476 assert( char_O_gtissue_no < NUM_COMP ); |
197 | 1477 assert( 0.0 <= calc_lead_tissue_limit && calc_lead_tissue_limit <= 14.0); |
167 | 1478 } |
1479 | |
1480 ////////////////////////////////////////////////////////////////////////////// | |
1481 // calc_nullzeit | |
1482 // | |
1483 // calculates the remaining bottom time | |
1484 // | |
511
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1485 // NOTE: Erik Baker's closed formula works for Nitroxes. Trimix adds a second |
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1486 // exponential term to the M-value equation, making it impossible to |
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1487 // invert... So we have to make a fast-simu until we find a better way. |
509 | 1488 // |
1489 // Input: pres_respiration | |
1490 // Output: char_O_nullzeit | |
167 | 1491 // |
1492 static void calc_nullzeit(void) | |
1493 { | |
511
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1494 //---- Compute ppN2 and ppHe --------------------------------------------- |
509 | 1495 temp_deco = pres_respiration; |
1496 sim_alveolar_presures(); | |
167 | 1497 |
509 | 1498 char_O_nullzeit = 240; |
1499 for(ci=0; ci<NUM_COMP; ci++) | |
1500 { | |
511
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1501 //---- Read A/B values and loading factor for N2 and He -------------- |
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1502 overlay float tN2 = pres_tissue_N2[ci]; |
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1503 overlay float tHe = pres_tissue_He[ci]; |
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1504 overlay float t = tN2 + tHe; |
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1505 overlay unsigned char ndl; |
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1506 overlay unsigned char period = 10; |
192 | 1507 |
509 | 1508 read_buhlmann_coefficients(); |
511
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1509 read_buhlmann_times(2); // Starts with a 10min period. |
509 | 1510 |
511
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1511 //---- Simulate for that tissue -------------------------------------- |
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1512 // NOTE: No need to simulate for longuer than the already found NDL. |
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1513 for(ndl=0; ndl<char_O_nullzeit;) |
509 | 1514 { |
511
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1515 //---- Compute updated mix M-value at surface |
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1516 overlay float a = (var_N2_a * tN2 + var_He_a * tHe) / t; |
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1517 overlay float b = (var_N2_b * tN2 + var_He_b * tHe) / t; |
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1518 overlay float M0 = (a + pres_surface/b); |
116 | 1519 |
511
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1520 //---- Add 10min/1min to N2/He tissues |
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1521 overlay float dTN2 = (ppN2 - tN2) * var_N2_e; |
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1522 overlay float dTHe = (ppHe - tHe) * var_He_e; |
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1523 |
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1524 //---- Apply security margin when using the non-GF model |
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1525 if( char_I_deco_model == 0 ) |
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1526 { |
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1527 dTN2 *= float_saturation_multiplier; |
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1528 dTHe *= float_saturation_multiplier; |
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1529 } |
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1530 else // Or GF-based model |
509 | 1531 M0 = GF_high * (M0 - pres_surface) + pres_surface; |
167 | 1532 |
511
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1533 //---- Simulate off-gasing while going to surface |
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1534 // TODO ! |
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1535 // dTN2 -= exp( ... ascent time ... ppN2...) |
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1536 // dTHe -= exp( ... ascent time ... ppHe...) |
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1537 |
534
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1538 //---- Ok now, and still ok to surface after 1 or 10 minutes ? |
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1539 if( (t <= M0) && (t + dTN2 + dTHe <= M0) ) |
509 | 1540 { |
511
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1541 tN2 += dTN2; // YES: apply gas loadings, |
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1542 tHe += dTHe; |
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1543 t = tN2 + tHe; |
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1544 ndl += period; // increment NDL, |
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1545 continue; // and loop. |
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1546 } |
116 | 1547 |
511
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1548 //---- Should we retry with smaller steps ? |
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1549 if( period == 10 ) |
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1550 { |
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1551 read_buhlmann_times(1); // 1min coefs. |
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1552 period = 1; |
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1553 continue; |
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1554 } |
167 | 1555 |
511
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1556 //---- ELSE make a linear approx for the last minute |
524 | 1557 // Usefull to have a meaningfull rounding of NDL. |
1558 // But ONLY it positive (negativ casted to unsigned is bad). | |
1559 if( M0 > t ) | |
1560 ndl += (unsigned char)(0.5f + (M0-t)/(dTN2+dTHe)); | |
511
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1561 break; |
509 | 1562 } |
511
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1563 |
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1564 // Keep the shortest NDL found |
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1565 if( ndl < char_O_nullzeit ) |
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1566 char_O_nullzeit = ndl; |
339 | 1567 } |
167 | 1568 } |
116 | 1569 |
167 | 1570 ////////////////////////////////////////////////////////////////////////////// |
1571 // calc_ascenttime | |
1572 // | |
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1573 // Summup ascent from bottom to surface, at 1 bar/min, 1min for last 3 meters, |
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1574 // and all stops. |
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1575 // |
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1576 // Result in int_O_ascenttime, or int_O_extra_ascenttime if in @+5min variant. |
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1577 static void calc_ascenttime(void) |
116 | 1578 { |
323 | 1579 overlay unsigned char x; |
1580 overlay unsigned short sum; | |
168 | 1581 |
323 | 1582 // + 0.7 to count 1 minute ascent time from 3 metre to surface |
1583 overlay float ascent = pres_respiration - pres_surface + 0.7; | |
1584 if (ascent < 0.0) | |
1585 ascent = 0.0; | |
1586 sum = (unsigned short)(ascent + 0.99); | |
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1587 |
338 | 1588 for(x=0; x<NUM_STOPS && internal_deco_depth[x]; x++) |
323 | 1589 sum += (unsigned short)internal_deco_time[x]; |
1590 | |
1591 if( char_O_deco_status == 1 ) | |
1592 int_O_ascenttime = sum; | |
126 | 1593 else |
323 | 1594 int_O_extra_ascenttime = sum; |
167 | 1595 } |
116 | 1596 |
167 | 1597 ////////////////////////////////////////////////////////////////////////////// |
1598 // update_startvalues | |
1599 // | |
116 | 1600 // updated in v.102 |
167 | 1601 // |
116 | 1602 void update_startvalues(void) |
1603 { | |
167 | 1604 overlay unsigned char x; |
116 | 1605 |
201 | 1606 // Start ascent simulation with current tissue partial pressures. |
339 | 1607 for(x=0; x<NUM_COMP; x++) |
116 | 1608 { |
339 | 1609 sim_pres_tissue_N2[x] = pres_tissue_N2[x]; |
1610 sim_pres_tissue_He[x] = pres_tissue_He[x]; | |
116 | 1611 } |
197 | 1612 |
201 | 1613 // No leading tissue (yet) for this ascent simulation. |
197 | 1614 sim_lead_tissue_limit = 0.0; |
1615 sim_lead_tissue_no = 255; | |
167 | 1616 } |
116 | 1617 |
167 | 1618 ////////////////////////////////////////////////////////////////////////////// |
192 | 1619 // sim_tissue |
167 | 1620 // |
116 | 1621 // optimized in v.101 |
167 | 1622 // |
1623 // Function very simular to calc_tissue, but: | |
1624 // + Use a 1min or 10min period. | |
1625 // + Do it on sim_pres_tissue, instead of pres_tissue. | |
184 | 1626 static void sim_tissue(PARAMETER unsigned char period) |
116 | 1627 { |
251 | 1628 assert( 0.00 <= ppN2 && ppN2 < 11.2 ); // 80% N2 at 130m |
1629 assert( 0.00 <= ppHe && ppHe < 12.6 ); // 90% He at 130m | |
236 | 1630 |
338 | 1631 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1632 { |
258 | 1633 read_buhlmann_times(period); // 1 or 10 minute(s) interval |
165 | 1634 |
126 | 1635 // N2 |
339 | 1636 temp_tissue = (ppN2 - sim_pres_tissue_N2[ci]) * var_N2_e; |
126 | 1637 temp_tissue_safety(); |
339 | 1638 sim_pres_tissue_N2[ci] += temp_tissue; |
126 | 1639 |
1640 // He | |
339 | 1641 temp_tissue = (ppHe - sim_pres_tissue_He[ci]) * var_He_e; |
126 | 1642 temp_tissue_safety(); |
339 | 1643 sim_pres_tissue_He[ci] += temp_tissue; |
192 | 1644 } |
167 | 1645 } |
116 | 1646 |
167 | 1647 ////////////////////////////////////////////////////////////////////////////// |
192 | 1648 // sim_limit() |
1649 // | |
1650 // New in v.111 | |
1651 // | |
1652 // Function separated from sim_tissue() to allow recomputing limit on | |
1653 // different depth, because it depends on current gradient factor. | |
167 | 1654 // |
192 | 1655 static void sim_limit(PARAMETER float GF_current) |
116 | 1656 { |
212 | 1657 assert( 0.0 < GF_current && GF_current <= 1.0f); |
1658 | |
192 | 1659 sim_lead_tissue_limit = 0.0; |
212 | 1660 sim_lead_tissue_no = 0; // If no one is critic, keep first tissue. |
192 | 1661 |
338 | 1662 for(ci=0; ci<NUM_COMP; ci++) |
192 | 1663 { |
339 | 1664 overlay float N2 = sim_pres_tissue_N2[ci]; |
1665 overlay float He = sim_pres_tissue_He[ci]; | |
241 | 1666 overlay float p = N2 + He; |
192 | 1667 |
258 | 1668 read_buhlmann_coefficients(); |
241 | 1669 var_N2_a = (var_N2_a * N2 + var_He_a * He) / p; |
1670 var_N2_b = (var_N2_b * N2 + var_He_b * He) / p; | |
192 | 1671 |
1672 // Apply the Eric Baker's varying gradient factor correction. | |
1673 // Note: the correction factor depends both on GF and b, | |
1674 // Actual values are in the 1.5 .. 1.0 range (for a GF=30%), | |
1675 // so that can change who is the leading gas... | |
1676 // Note: Also depends of the GF_current... | |
509 | 1677 if( char_I_deco_model != 0 ) |
302 | 1678 p = ( p - var_N2_a * GF_current) |
1679 / (GF_current / var_N2_b + 1.0 - GF_current); | |
192 | 1680 else |
1681 p = (p - var_N2_a) * var_N2_b; | |
237 | 1682 if( p < 0.0 ) p = 0.0; |
192 | 1683 |
1684 if( p > sim_lead_tissue_limit ) | |
1685 { | |
1686 sim_lead_tissue_no = ci; | |
1687 sim_lead_tissue_limit = p; | |
1688 } | |
1689 } // for ci | |
197 | 1690 |
338 | 1691 assert( sim_lead_tissue_no < NUM_COMP ); |
237 | 1692 assert( 0.0 <= sim_lead_tissue_limit && sim_lead_tissue_limit <= 14.0 ); |
167 | 1693 } |
116 | 1694 |
167 | 1695 ////////////////////////////////////////////////////////////////////////////// |
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1696 // clear_deco_table |
167 | 1697 // |
1698 // unchanged in v.101 | |
1699 // | |
169
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1700 static void clear_deco_table(void) |
116 | 1701 { |
169
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1702 overlay unsigned char x; |
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1703 |
338 | 1704 for(x=0; x<NUM_STOPS; ++x) |
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1705 { |
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1706 internal_deco_time [x] = 0; |
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1707 internal_deco_depth[x] = 0; |
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1708 } |
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1709 } |
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1710 |
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1711 ////////////////////////////////////////////////////////////////////////////// |
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1712 // update_deco_table |
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1713 // |
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1714 // Add 1 min to current stop. |
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1715 // |
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1716 // Inputs: |
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1717 // temp_depth_limit = stop's depth, in meters. |
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1718 // In/Out: |
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1719 // internal_deco_depth[] : depth (in metres) of each stops. |
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1720 // internal_deco_time [] : time (in minutes) of each stops. |
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1721 // |
471 | 1722 static unsigned char update_deco_table() |
169
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1723 { |
192 | 1724 overlay unsigned char x; |
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1725 assert( temp_depth_limit < 128 ); // Can't be negativ (overflown). |
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1726 assert( temp_depth_limit > 0 ); // No stop at surface... |
169
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1727 |
338 | 1728 for(x=0; x<NUM_STOPS; ++x) |
192 | 1729 { |
212 | 1730 // Make sure deco-stops are recorded in order: |
334
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1731 assert( !internal_deco_depth[x] || temp_depth_limit <= (internal_deco_depth[x]& 0x7F) ); |
212 | 1732 |
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1733 if( (internal_deco_depth[x] & 0x7F) == temp_depth_limit ) |
192 | 1734 { |
1735 // Do not overflow (max 255') | |
1736 if( internal_deco_time[x] < 255 ) | |
1737 { | |
1738 internal_deco_time[x]++; | |
471 | 1739 return 1; |
192 | 1740 } |
1741 // But store extra in the next stop... | |
169
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1742 } |
192 | 1743 |
169
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1744 if( internal_deco_depth[x] == 0 ) |
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1745 { |
192 | 1746 internal_deco_depth[x] = temp_depth_limit; |
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1747 if( sim_gas_delay >= sim_dive_mins ) |
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1748 internal_deco_depth[x] |= 0x80; |
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1749 |
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1750 internal_deco_time[x] = 1; |
471 | 1751 return 1; |
169
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1752 } |
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1753 } |
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1754 |
192 | 1755 // Can't store stops at more than 96m. |
1756 // Or stops at less that 3m too. | |
169
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1757 // Just do nothing with that... |
471 | 1758 return 0; |
167 | 1759 } |
116 | 1760 |
167 | 1761 ////////////////////////////////////////////////////////////////////////////// |
1762 // calc_gradient_factor | |
1763 // | |
165 | 1764 // optimized in v.101 (var_N2_a) |
116 | 1765 // new code in v.102 |
167 | 1766 // |
1767 static void calc_gradient_factor(void) | |
116 | 1768 { |
197 | 1769 overlay float gf; |
339 | 1770 overlay float N2 = pres_tissue_N2[char_O_gtissue_no]; |
1771 overlay float He = pres_tissue_He[char_O_gtissue_no]; | |
237 | 1772 |
338 | 1773 assert( char_O_gtissue_no < NUM_COMP ); |
237 | 1774 assert( 0.800 <= pres_respiration && pres_respiration < 14.0 ); |
197 | 1775 |
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1776 // tissue > respiration (currently off-gasing) |
302 | 1777 // GF = 0% when respiration == tissue, ie. bubbles are at equilibrium. |
1778 // GF = 100% when respiration == limit. | |
293
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1779 temp_tissue = N2 + He; |
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1780 if( temp_tissue <= pres_respiration ) |
197 | 1781 gf = 0.0; |
1782 else | |
1783 { | |
293
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1784 overlay float limit = calc_lead_tissue_limit; |
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1785 // NOTE: in GF model, calc_lead_tissue_limit include already the |
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1786 // correction due to gradient factor. To compute the actual |
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1787 // current GF, we need to (re-)compute the raw ambiant-pressure |
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1788 // limit from the Bühlmann model. |
509 | 1789 if( char_I_deco_model != 0 ) |
293
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1790 { |
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1791 ci = char_O_gtissue_no; |
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1792 read_buhlmann_coefficients(); |
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1793 var_N2_a = (var_N2_a * N2 + var_He_a * He) / temp_tissue; |
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1794 var_N2_b = (var_N2_b * N2 + var_He_b * He) / temp_tissue; |
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1795 limit = (temp_tissue - var_N2_a) * var_N2_b; |
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1796 } |
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1797 |
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1798 gf = (temp_tissue - pres_respiration) |
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1799 / (temp_tissue - limit) |
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1800 * 100.0; |
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1801 if( gf > 254.5 ) gf = 255.0; |
197 | 1802 if( gf < 0.0 ) gf = 0.0; |
1803 } | |
293
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1804 char_O_gradient_factor = (unsigned char)(gf+0.5f); |
116 | 1805 |
509 | 1806 if( char_I_deco_model != 0 ) // calculate relative gradient factor |
116 | 1807 { |
197 | 1808 overlay float rgf; |
1809 | |
562 | 1810 if( low_depth < 3 ) |
197 | 1811 rgf = GF_high; |
1812 else | |
1813 { | |
317 | 1814 overlay float temp1 = low_depth * METER_TO_BAR; |
197 | 1815 overlay float temp2 = pres_respiration - pres_surface; |
186 | 1816 |
197 | 1817 if (temp2 <= 0) |
1818 rgf = GF_high; | |
1819 else if (temp2 >= temp1) | |
1820 rgf = GF_low; | |
1821 else | |
1822 rgf = GF_low + (temp1 - temp2)/temp1*GF_delta; | |
1823 } | |
186 | 1824 |
197 | 1825 rgf = gf / rgf; // gf is already in percent |
1826 if( rgf < 0.0 ) rgf = 0.0; | |
293
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1827 if( rgf > 254.5 ) rgf = 255.0; |
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1828 char_O_relative_gradient_GF = (unsigned char)(rgf+0.5f); |
116 | 1829 } // calc relative gradient factor |
1830 else | |
1831 { | |
186 | 1832 char_O_relative_gradient_GF = char_O_gradient_factor; |
116 | 1833 } |
167 | 1834 } |
116 | 1835 |
167 | 1836 ////////////////////////////////////////////////////////////////////////////// |
1837 // deco_calc_desaturation_time | |
1838 // | |
116 | 1839 // FIXED N2_ratio |
1840 // unchanged in v.101 | |
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1841 // Inputs: int_I_pres_surface, ppWater, char_I_desaturation_multiplier |
233 | 1842 // Outputs: int_O_desaturation_time, char_O_tissue_saturation[0..31] |
167 | 1843 // |
116 | 1844 void deco_calc_desaturation_time(void) |
1845 { | |
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1846 RESET_C_STACK |
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1847 |
233 | 1848 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1849 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1850 | |
237 | 1851 N2_ratio = 0.7902; // FIXED sum as stated in bühlmann |
233 | 1852 pres_surface = int_I_pres_surface * 0.001; |
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1853 ppN2 = N2_ratio * (pres_surface - ppWater); |
126 | 1854 int_O_desaturation_time = 0; |
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1855 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
233 | 1856 |
339 | 1857 for(ci=0; ci<NUM_COMP; ci++) |
126 | 1858 { |
251 | 1859 overlay unsigned short desat_time; // For a particular compartiment, in min. |
1860 overlay float temp1; | |
1861 overlay float temp2; | |
1862 overlay float temp3; | |
1863 overlay float temp4; | |
338 | 1864 |
509 | 1865 read_buhlmann_ht(); |
338 | 1866 |
126 | 1867 // saturation_time (for flight) and N2_saturation in multiples of halftime |
1868 // version v.100: 1.1 = 10 percent distance to totally clean (totally clean is not possible, would take infinite time ) | |
1869 // 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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1870 // changes in v.101: 1.05 = 5 percent dist to totally clean is new desaturation point for display and NoFly calculations |
126 | 1871 // N2 |
339 | 1872 temp1 = 1.05 * ppN2 - pres_tissue_N2[ci]; |
1873 temp2 = ppN2 - pres_tissue_N2[ci]; | |
126 | 1874 if (temp2 >= 0.0) |
233 | 1875 temp1 = 0.0; |
126 | 1876 else |
1877 temp1 = temp1 / temp2; | |
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1878 |
251 | 1879 if( 0.0 < temp1 && temp1 < 1.0 ) |
126 | 1880 { |
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1881 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
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1882 // minus because log is negative. |
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1883 temp1 = log(1.0 - temp1) / -0.6931; // temp1 is the multiples of half times necessary. |
509 | 1884 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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1885 |
126 | 1886 } |
1887 else | |
1888 { | |
233 | 1889 temp1 = 0.0; |
1890 temp2 = 0.0; | |
126 | 1891 } |
116 | 1892 |
126 | 1893 // He |
339 | 1894 temp3 = 0.1 - pres_tissue_He[ci]; |
126 | 1895 if (temp3 >= 0.0) |
233 | 1896 temp3 = 0.0; |
126 | 1897 else |
339 | 1898 temp3 = - temp3 / pres_tissue_He[ci]; |
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1899 |
251 | 1900 if( 0.0 < temp3 && temp3 < 1.0 ) |
126 | 1901 { |
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1902 temp3 = log(1.0 - temp3) / -0.6931; // temp1 is the multiples of half times necessary. |
126 | 1903 // 0.6931 is ln(2), because the math function log() calculates with a base of e not 2 as requested. |
1904 // minus because log is negative | |
509 | 1905 temp4 = var_He_ht * temp3 / float_desaturation_multiplier; // time necessary (in minutes ) for "complete" desaturation, new in v.101 float_desaturation_multiplier |
126 | 1906 } |
1907 else | |
1908 { | |
233 | 1909 temp3 = 0.0; |
1910 temp4 = 0.0; | |
126 | 1911 } |
116 | 1912 |
126 | 1913 // saturation_time (for flight) |
1914 if (temp4 > temp2) | |
203 | 1915 desat_time = (unsigned short)temp4; |
126 | 1916 else |
203 | 1917 desat_time = (unsigned short)temp2; |
252 | 1918 |
251 | 1919 if(desat_time > int_O_desaturation_time) |
1920 int_O_desaturation_time = desat_time; | |
116 | 1921 |
126 | 1922 // N2 saturation in multiples of halftime for display purposes |
339 | 1923 temp2 = temp1 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1924 temp2 = temp2 + 80.0; // set center | |
126 | 1925 if (temp2 < 0.0) |
1926 temp2 = 0.0; | |
1927 if (temp2 > 255.0) | |
1928 temp2 = 255.0; | |
339 | 1929 char_O_tissue_N2_saturation[ci] = (char)temp2; |
233 | 1930 |
126 | 1931 // He saturation in multiples of halftime for display purposes |
339 | 1932 temp4 = temp3 * 20.0; // 0 = 1/8, 120 = 0, 249 = 8 |
1933 temp4 = temp4 + 80.0; // set center | |
126 | 1934 if (temp4 < 0.0) |
1935 temp4 = 0.0; | |
1936 if (temp4 > 255.0) | |
1937 temp4 = 255.0; | |
339 | 1938 char_O_tissue_He_saturation[ci] = (char)temp4; |
126 | 1939 } // for |
167 | 1940 } |
116 | 1941 |
167 | 1942 ////////////////////////////////////////////////////////////////////////////// |
1943 // calc_wo_deco_step_1_min | |
1944 // | |
116 | 1945 // FIXED N2 Ratio |
1946 // optimized in v.101 (...saturation_multiplier) | |
1947 // desaturation slowed down to 70,42% | |
167 | 1948 // |
1949 static void calc_wo_deco_step_1_min(void) | |
116 | 1950 { |
251 | 1951 assert( 800 < int_I_pres_surface && int_I_pres_surface < 1100 ); |
1952 assert( 800 < int_I_pres_respiration && int_I_pres_respiration < 1100 ); | |
1953 assert( 100 <= char_I_saturation_multiplier && char_I_saturation_multiplier < 200 ); | |
1954 assert( 0 < char_I_desaturation_multiplier && char_I_desaturation_multiplier <= 100 ); | |
1955 | |
126 | 1956 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann |
368 | 1957 pres_respiration = pres_surface = int_I_pres_surface * 0.001; |
1958 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
200 | 1959 ppHe = 0.0; |
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1960 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
197 | 1961 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
126 | 1962 |
339 | 1963 calc_tissue(1); // update the pressure in the tissues N2/He in accordance with the new ambient pressure |
167 | 1964 |
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1965 clear_deco_table(); |
200 | 1966 char_O_deco_status = 3; // surface new in v.102 : stays in surface state. |
126 | 1967 char_O_nullzeit = 0; |
168 | 1968 int_O_ascenttime = 0; |
323 | 1969 int_O_extra_ascenttime = 0; |
126 | 1970 calc_gradient_factor(); |
167 | 1971 } |
126 | 1972 |
167 | 1973 ////////////////////////////////////////////////////////////////////////////// |
368 | 1974 // calc_dive_interval |
1975 // | |
1976 // Prepare tissue for delay before the next dive simulation. | |
1977 // | |
1978 // Inputs: char_I_dive_interval == delay before dive (in 10' steps). | |
1979 // Outputs: pres_tissue_N2/He[], CNS_fraction | |
1980 // | |
1981 // Should be protected by deco_push_tissues_to_vault(), | |
1982 // deco_pull_tissues_from_vault() | |
1983 // | |
1984 // desaturation slowed down to 70,42%. | |
1985 // | |
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1986 static void calc_dive_interval(void) |
368 | 1987 { |
1988 overlay unsigned char t; | |
491
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1989 overlay unsigned char backup_model; |
368 | 1990 |
1991 //---- Initialize simulation parameters ---------------------------------- | |
1992 N2_ratio = 0.7902; // FIXED, sum lt. buehlmann | |
1993 pres_respiration = pres_surface = int_I_pres_surface * 0.001; | |
1994 ppN2 = N2_ratio * (pres_respiration - ppWater); | |
1995 ppHe = 0.0; | |
491
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1996 float_desaturation_multiplier = char_I_desaturation_multiplier * (0.01 * SURFACE_DESAT_FACTOR); |
368 | 1997 float_saturation_multiplier = char_I_saturation_multiplier * 0.01; |
1998 | |
568 | 1999 // Make sure SURFACE_DESAT_FACTOR is applied: |
491
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2000 backup_model = char_I_deco_model; |
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2001 char_I_deco_model = 0; |
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2002 |
368 | 2003 //---- Perform simulation ------------------------------------------------ |
2004 for(t=0; t<char_I_dive_interval; ++t) | |
2005 { | |
2006 calc_tissue(2); // period = 10min. | |
2007 CNS_fraction = 0.92587471 * CNS_fraction; // Half-time = 90min: (1/2)^(1/9) | |
2008 } | |
514 | 2009 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
2010 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); | |
491
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2011 |
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2012 //---- Restore model ----------------------------------------------------- |
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2013 char_I_deco_model = backup_model; |
368 | 2014 } |
2015 | |
2016 ////////////////////////////////////////////////////////////////////////////// | |
167 | 2017 ////////////////////////////////////////////////////////////////////////////// |
2018 ////////////////////////////////// deco_hash ///////////////////////////////// | |
2019 ////////////////////////////////////////////////////////////////////////////// | |
2020 ////////////////////////////////////////////////////////////////////////////// | |
126 | 2021 |
184 | 2022 #ifndef CROSS_COMPILE |
116 | 2023 void deco_hash(void) |
2024 { | |
167 | 2025 overlay unsigned char md_i, md_j; // Loop index. |
2026 overlay unsigned char md_t; | |
2027 overlay unsigned char md_buffer[16]; | |
2028 overlay unsigned char md_temp; | |
203 | 2029 overlay unsigned short md_pointer; |
167 | 2030 |
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2031 RESET_C_STACK |
126 | 2032 |
2033 // init | |
164 | 2034 for(md_i=0;md_i<16;md_i++) |
126 | 2035 { |
2036 md_state[md_i] = 0; | |
164 | 2037 char_O_hash[md_i] = 0; |
126 | 2038 } // for md_i 16 |
116 | 2039 |
126 | 2040 _asm |
167 | 2041 movlw 0x01 // md_pi address. |
2042 movwf TBLPTRU,0 | |
2043 movlw 0x7E | |
2044 movwf TBLPTRH,0 | |
2045 movlw 0x00 | |
2046 movwf TBLPTRL,0 | |
126 | 2047 _endasm; |
165 | 2048 md_i = 0; |
2049 do { | |
126 | 2050 _asm |
2051 TBLRDPOSTINC | |
2052 movff TABLAT,md_temp | |
2053 _endasm | |
165 | 2054 md_pi_subst[md_i++] = md_temp; |
2055 } while( md_i != 0 ); | |
2056 | |
126 | 2057 _asm |
167 | 2058 movlw 0x00 |
2059 movwf TBLPTRU,0 | |
2060 movlw 0x00 | |
2061 movwf TBLPTRH,0 | |
2062 movlw 0x00 | |
2063 movwf TBLPTRL,0 | |
126 | 2064 _endasm |
167 | 2065 |
126 | 2066 // cycle buffers |
2067 for (md_pointer=0x0000;md_pointer<0x17f3;md_pointer++) | |
2068 { | |
2069 md_t = 0; | |
2070 for (md_i=0;md_i<16;md_i++) | |
2071 { | |
2072 if(md_pointer == 9) | |
164 | 2073 md_temp = char_O_hash[md_i]; |
126 | 2074 else |
2075 { | |
2076 _asm | |
167 | 2077 TBLRDPOSTINC |
2078 movff TABLAT,md_temp | |
126 | 2079 _endasm |
2080 } // else | |
167 | 2081 |
2082 md_buffer[md_i] = md_temp; | |
186 | 2083 md_state[md_i+16] = md_temp; |
2084 md_state[md_i+32] = (unsigned char)(md_temp ^ md_state[md_i]); | |
126 | 2085 } // for md_i 16 |
2086 | |
2087 for (md_i=0;md_i<18;md_i++) | |
2088 { | |
2089 for (md_j=0;md_j<48;md_j++) | |
2090 { | |
167 | 2091 md_state[md_j] ^= md_pi_subst[md_t]; |
126 | 2092 md_t = md_state[md_j]; |
2093 } // for md_j 48 | |
2094 md_t = (unsigned char)(md_t+1); | |
2095 } // for md_i 18 | |
164 | 2096 md_t = char_O_hash[15]; |
126 | 2097 |
2098 for (md_i=0;md_i<16;md_i++) | |
2099 { | |
167 | 2100 char_O_hash[md_i] ^= md_pi_subst[(md_buffer[md_i] ^ md_t)]; |
164 | 2101 md_t = char_O_hash[md_i]; |
126 | 2102 } // for md_i 16 |
2103 } // for md_pointer | |
116 | 2104 } // void deco_hash(void) |
184 | 2105 #endif |
116 | 2106 |
167 | 2107 ////////////////////////////////////////////////////////////////////////////// |
2108 // deco_clear_CNS_fraction | |
2109 // | |
116 | 2110 // new in v.101 |
167 | 2111 // |
116 | 2112 void deco_clear_CNS_fraction(void) |
2113 { | |
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2114 RESET_C_STACK |
237 | 2115 |
126 | 2116 CNS_fraction = 0.0; |
2117 char_O_CNS_fraction = 0; | |
167 | 2118 } |
116 | 2119 |
167 | 2120 ////////////////////////////////////////////////////////////////////////////// |
2121 // deco_calc_CNS_fraction | |
2122 // | |
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2123 // Input: char_I_actual_ppO2 : Current condition (in decibars). |
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2124 // char_I_step_is_1min : use 1min or 10min steps instead of 2sec. |
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2125 // CNS_fraction : velue before period. |
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2126 // Output: CNS_fraction, char_O_CNS_fraction |
167 | 2127 // |
116 | 2128 void deco_calc_CNS_fraction(void) |
2129 { | |
292 | 2130 overlay float time_factor = 1.0f; |
126 | 2131 RESET_C_STACK |
167 | 2132 |
471 | 2133 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2134 assert( char_I_actual_ppO2 > 15 ); |
2135 | |
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2136 if( char_I_step_is_1min == 1 ) |
292 | 2137 time_factor = 30.0f; |
439
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2138 else if( char_I_step_is_1min == 2 ) |
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2139 time_factor = 300.0f; |
116 | 2140 |
126 | 2141 if (char_I_actual_ppO2 < 50) |
292 | 2142 ; // no changes |
126 | 2143 else if (char_I_actual_ppO2 < 60) |
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2144 CNS_fraction += time_factor/(-540.0 * char_I_actual_ppO2 + 54000.0); |
126 | 2145 else if (char_I_actual_ppO2 < 70) |
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2146 CNS_fraction += time_factor/(-450.0 * char_I_actual_ppO2 + 48600.0); |
126 | 2147 else if (char_I_actual_ppO2 < 80) |
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2148 CNS_fraction += time_factor/(-360.0 * char_I_actual_ppO2 + 42300.0); |
126 | 2149 else if (char_I_actual_ppO2 < 90) |
439
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2150 CNS_fraction += time_factor/(-270.0 * char_I_actual_ppO2 + 35100.0); |
126 | 2151 else if (char_I_actual_ppO2 < 110) |
439
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2152 CNS_fraction += time_factor/(-180.0 * char_I_actual_ppO2 + 27000.0); |
126 | 2153 else if (char_I_actual_ppO2 < 150) |
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2154 CNS_fraction += time_factor/( -90.0 * char_I_actual_ppO2 + 17100.0); |
126 | 2155 else if (char_I_actual_ppO2 < 160) |
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2156 CNS_fraction += time_factor/(-225.0 * char_I_actual_ppO2 + 37350.0); |
126 | 2157 else if (char_I_actual_ppO2 < 165) |
292 | 2158 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 | 2159 else if (char_I_actual_ppO2 < 170) |
292 | 2160 CNS_fraction += time_factor*0.00102; // example calculation: Sqrt((1.7/1.55)^20)*0.000404 |
126 | 2161 else if (char_I_actual_ppO2 < 175) |
292 | 2162 CNS_fraction += time_factor*0.00136; |
126 | 2163 else if (char_I_actual_ppO2 < 180) |
292 | 2164 CNS_fraction += time_factor*0.00180; |
126 | 2165 else if (char_I_actual_ppO2 < 185) |
292 | 2166 CNS_fraction += time_factor*0.00237; |
126 | 2167 else if (char_I_actual_ppO2 < 190) |
292 | 2168 CNS_fraction += time_factor*0.00310; |
126 | 2169 else if (char_I_actual_ppO2 < 195) |
292 | 2170 CNS_fraction += time_factor*0.00401; |
126 | 2171 else if (char_I_actual_ppO2 < 200) |
292 | 2172 CNS_fraction += time_factor*0.00517; |
126 | 2173 else if (char_I_actual_ppO2 < 230) |
292 | 2174 CNS_fraction += time_factor*0.0209; |
126 | 2175 else |
292 | 2176 CNS_fraction += time_factor*0.0482; // value for 2.5 |
116 | 2177 |
514 | 2178 if( CNS_fraction > 2.5 ) |
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2179 CNS_fraction = 2.55; |
514 | 2180 if( CNS_fraction < 0.0 ) |
126 | 2181 CNS_fraction = 0.0; |
2182 | |
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2183 char_O_CNS_fraction = (unsigned char)(100.0 * CNS_fraction + 0.5); |
167 | 2184 } |
116 | 2185 |
167 | 2186 ////////////////////////////////////////////////////////////////////////////// |
439
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2187 // deco_calc_CNS_planning |
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2188 // |
511
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2189 // Compute CNS during predicted ascent. |
488 | 2190 // |
2191 // Note: Needs a call to deco_push_tissues_to_vault(), | |
2192 // deco_pull_tissues_from_vault() to avoid trashing everything... | |
2193 // | |
2194 // Input: CNS_fraction, char_O_deco_time[], char_O_deco_depth[] | |
2195 // Output: CNS_fraction, char_O_CNS_fraction | |
2196 // | |
439
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2197 void deco_calc_CNS_planning(void) |
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2198 { |
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2199 overlay unsigned char backup_gas_last_depth; |
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2200 overlay unsigned char backup_gas_last_used; |
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2201 overlay unsigned short backup_gas_delay; |
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2202 overlay unsigned short backup_dive_mins; |
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2203 overlay unsigned char backup_actual_ppO2; |
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2204 |
439
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2205 RESET_C_STACK |
490
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2206 |
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2207 // Backup state machine |
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2208 backup_gas_last_depth = sim_gas_last_depth; |
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2209 backup_gas_last_used = sim_gas_last_used; |
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2210 backup_gas_delay = sim_gas_delay; |
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2211 backup_dive_mins = sim_dive_mins; |
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2212 backup_actual_ppO2 = char_I_actual_ppO2; |
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2213 |
439
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2214 // Uses 1min CNS period: |
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2215 char_I_step_is_1min = 1; |
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2216 |
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2217 //---- Retrieve bottom Gas used, and set variables. |
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2218 sim_gas_last_used = char_I_first_gas; |
443
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2219 sim_gas_last_depth = 0; // Surface gas marker. |
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2220 gas_switch_set(); // Sets initial calc_N2/He_ratio |
439
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2221 |
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2222 //---- CCR mode : do the full TTS at once -------------------------------- |
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2223 if( char_I_const_ppO2 != 0 ) |
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2224 { |
443
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2225 overlay unsigned short t; // Needs 16bits here ! |
439
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2226 char_I_actual_ppO2 = char_I_const_ppO2; |
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2227 for(t=0; t<int_O_ascenttime; ++t) |
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2228 deco_calc_CNS_fraction(); |
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2229 } |
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2230 else //---- OC mode : have to follow all gas switches... ----------------- |
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2231 { |
443
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2232 overlay unsigned char i = 0; // Decostop loop counter |
439
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2233 overlay float actual_ppO2; |
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2234 overlay unsigned char time, t; |
563 | 2235 overlay unsigned char deepest_first = (read_custom_function(54) == 0); |
439
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2236 |
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2237 //---- Ascent to surface delay |
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2238 // NOTE: count as if time is spent with bottom pressure, |
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2239 // AND the bottom gas |
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2240 actual_ppO2 = (pres_surface + char_I_bottom_depth * METER_TO_BAR) |
439
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2241 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2242 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2243 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2244 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2245 |
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2246 // Ascent time (rounded up): |
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2247 time = (unsigned char)(0.1 * char_I_bottom_depth + 0.5); |
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2248 |
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2249 for(t=0; t<time; ++t) |
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2250 { |
439
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2251 deco_calc_CNS_fraction(); |
490
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2252 sim_dive_mins++; |
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2253 } |
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2254 |
563 | 2255 //---- Do all further stops ------------------------------------------ |
439
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2256 for(i=0; i<NUM_STOPS; ++i) |
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2257 { |
563 | 2258 overlay unsigned char switch_gas; |
2259 | |
2260 //---- Get next stop, possibly in reverse order ------------------ | |
2261 if( deepest_first ) | |
2262 { | |
2263 time = char_O_deco_time[i]; | |
2264 temp_depth_limit = char_O_deco_depth[i]; | |
2265 } | |
2266 else | |
2267 { | |
2268 time = char_O_deco_time[(NUM_STOPS-1)-i]; | |
2269 temp_depth_limit = char_O_deco_depth[(NUM_STOPS-1)-i]; | |
2270 } | |
2271 if( time == 0 ) continue; | |
439
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2272 |
563 | 2273 //---- Gas Switch ? ---------------------------------------------- |
2274 switch_gas = temp_depth_limit & 0x80; // Switch flag. | |
2275 temp_depth_limit &= 0x7F; // True stop depth. | |
2276 | |
2277 if( switch_gas ) | |
2278 { | |
2279 gas_switch_deepest(); | |
2280 gas_switch_set(); | |
2281 } | |
2282 | |
2283 //---- Convert Depth and N2_ratio to ppO2 ------------------------ | |
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2284 actual_ppO2 = (pres_surface + temp_depth_limit * METER_TO_BAR) |
439
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2285 * (1.0 - calc_N2_ratio - calc_He_ratio); |
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2286 if( actual_ppO2 < 0.0 ) actual_ppO2 = 0.0; |
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2287 if( actual_ppO2 > 2.50 ) actual_ppO2 = 2.55; |
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2288 char_I_actual_ppO2 = (unsigned char)(100.0 * actual_ppO2 + 0.5); |
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2289 |
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2290 //---- Apply the stop |
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2291 for(t=0; t<time; ++t) |
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2292 { |
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2293 deco_calc_CNS_fraction(); |
490
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2294 sim_dive_mins++; |
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2295 } |
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2296 } |
488 | 2297 } |
2298 | |
563 | 2299 //---- Back to normal mode... -------------------------------------------- |
488 | 2300 char_I_step_is_1min = 0; |
490
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2301 sim_gas_last_depth = backup_gas_last_depth; |
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2302 sim_gas_last_used = backup_gas_last_used; |
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2303 sim_gas_delay = backup_gas_delay; |
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2304 sim_dive_mins = backup_dive_mins; |
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2305 char_I_actual_ppO2 = backup_actual_ppO2; |
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2306 } |
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2307 |
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2308 ////////////////////////////////////////////////////////////////////////////// |
167 | 2309 // deco_calc_CNS_decrease_15min |
2310 // | |
116 | 2311 // new in v.101 |
167 | 2312 // |
116 | 2313 // calculates the half time of 90 minutes in 6 steps of 15 min |
200 | 2314 // (Used in sleepmode, for low battery mode). |
167 | 2315 // |
116 | 2316 // Output: char_O_CNS_fraction |
2317 // Uses and Updates: CNS_fraction | |
167 | 2318 // |
116 | 2319 void deco_calc_CNS_decrease_15min(void) |
2320 { | |
237 | 2321 RESET_C_STACK |
514 | 2322 assert( 0.0 <= CNS_fraction && CNS_fraction <= 2.56 ); |
237 | 2323 |
126 | 2324 CNS_fraction = 0.890899 * CNS_fraction; |
514 | 2325 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
167 | 2326 } |
116 | 2327 |
167 | 2328 ////////////////////////////////////////////////////////////////////////////// |
2329 // deco_calc_percentage | |
2330 // | |
116 | 2331 // new in v.101 |
167 | 2332 // |
116 | 2333 // calculates int_I_temp * char_I_temp / 100 |
2334 // output is int_I_temp | |
200 | 2335 // |
2336 // Used to compute NoFly remaining time. | |
222
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2337 // |
116 | 2338 void deco_calc_percentage(void) |
2339 { | |
122
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2340 RESET_C_STACK |
222
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2341 |
237 | 2342 assert( 60 <= char_I_temp && char_I_temp <= 100 ); |
564 | 2343 assert( int_I_temp < 5760 ); // Less than 4 days = 96h... |
237 | 2344 |
222
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2345 int_I_temp = (unsigned short)(((float)int_I_temp * (float)char_I_temp) * 0.01 ); |
237 | 2346 |
554
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2347 assert( int_I_temp < 5760 ); // Less than 96h too... |
222
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2348 } |
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2349 |
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2350 |
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2351 ////////////////////////////////////////////////////////////////////////////// |
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2352 // deco_gas_volumes |
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2353 // |
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2354 // new in v.111 |
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2355 // |
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2356 // calculates volumes for each gas. |
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2357 // |
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2358 // Input: char_I_bottom_depth, char_I_bottom_time for planned dive. |
240
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2359 // Gas list. |
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2360 // char_I_first_gas is the bottom gas. |
222
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2361 // decoplan (char_O_deco_depth, char_O_deco_time). |
234
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2362 // CF#54 == TRUE if shallowest stop first. |
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2363 // CF#56 == bottom liters/minutes (5 .. 50) or bar/min. |
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2364 // CF#57 == deco liters/minutes (5 .. 50) or bar/min. |
224 | 2365 // Output: int_O_gas_volumes[0..4] in litters * 0.1 |
222
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2366 // |
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2367 void deco_gas_volumes(void) |
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2368 { |
338 | 2369 overlay float volumes[NUM_GAS]; |
478
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2370 overlay float bottom_usage, deco_usage; |
234
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2371 overlay unsigned char i, deepest_first; |
241 | 2372 overlay unsigned char gas; |
222
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2373 RESET_C_STACK |
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2374 |
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2375 //---- initialize with bottom consumption -------------------------------- |
338 | 2376 for(i=0; i<NUM_GAS; ++i) // Nothing yet... |
240
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2377 volumes[i] = 0.0; |
222
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2378 |
338 | 2379 assert(1 <= char_I_first_gas && char_I_first_gas <= NUM_GAS); |
241 | 2380 gas = char_I_first_gas - 1; |
2381 | |
478
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2382 bottom_usage = (float) read_custom_function(56); |
580
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|
2383 if( char_I_const_ppO2 == 0 && bottom_usage > 0.0 ) |
265 | 2384 volumes[gas] |
2385 = (char_I_bottom_depth*0.1 + 1.0) // Use Psurface = 1.0 bar. | |
2386 * char_I_bottom_time // in minutes. | |
2387 * bottom_usage; // In liter/minutes. | |
579
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2388 |
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2389 //---- Starts by a gas switch ? ------------------------------------------ |
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2390 // If there is no special gas-switch stops inserted, then |
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2391 // we should pay attention to the gas when starting to ascent, before |
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2392 // the first stop... |
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2393 if( read_custom_function(55) == 0 ) |
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2394 { |
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2395 overlay unsigned char j; |
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2396 for(j=0; j<NUM_GAS; ++j) |
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2397 { |
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2398 if( char_O_first_deco_depth < char_I_deco_gas_change[j] ) |
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2399 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
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2400 gas = j; |
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2401 } |
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2402 } |
222
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Prototyping deco_gas_volumes() to compute gas consumption per tank with decoplanning.
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2403 |
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2404 //---- Ascent usage ------------------------------------------------------ |
234
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2405 deepest_first = read_custom_function(54) == 0; |
511
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NEW NDL NDL faster/more precise simu (but no closed formula for trimix).
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2406 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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2407 |
224 | 2408 // Usage up to the first stop: |
2409 // - computed at MAX depth (easier, safer), | |
222
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2410 // - with an ascent speed of 10m/min. |
224 | 2411 // - with ascent litter / minutes. |
222
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2412 // - still using bottom gas: |
478
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2413 if( deco_usage > 0.0 ) |
265 | 2414 volumes[gas] |
2415 += (char_I_bottom_depth*0.1 + 1.0) // Depth -> bar | |
2416 * (char_I_bottom_depth - char_O_first_deco_depth) * 0.1 // ascent time (min) | |
478
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2417 * deco_usage; // Consumption ( xxx / min @ 1 bar) |
222
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2418 |
338 | 2419 for(i=0; i<NUM_STOPS; ++i) |
222
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2420 { |
241 | 2421 overlay unsigned char j; |
234
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2422 overlay unsigned char depth, time, ascent; |
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2423 |
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2424 // Manage stops in reverse order (CF#54) |
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2425 if( deepest_first ) |
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2426 { |
241 | 2427 time = char_O_deco_time[i]; |
234
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2428 if( time == 0 ) break; // End of table: done. |
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2429 |
288
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2430 ascent = depth = char_O_deco_depth[i] & 0x7F; |
234
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2431 if( i < 31 ) |
288
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2432 ascent -= char_O_deco_depth[i+1] & 0x7F; |
234
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2433 } |
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2434 else |
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2435 { |
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2436 time = char_O_deco_time[31-i]; |
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2437 if( time == 0 ) continue; // not yet: still searh table. |
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2438 |
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2439 ascent = depth = char_O_deco_depth[31-i] & 0x7F; |
234
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2440 if( i < 31 ) |
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2441 ascent -= char_O_deco_depth[30-i] & 0x7F; |
234
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|
2442 } |
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|
2443 |
222
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2444 // Gas switch depth ? |
338 | 2445 for(j=0; j<NUM_GAS; ++j) |
222
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|
2446 { |
234
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2447 if( depth <= char_I_deco_gas_change[j] ) |
241 | 2448 if( !char_I_deco_gas_change[gas] || (char_I_deco_gas_change[gas] > char_I_deco_gas_change[j]) ) |
224 | 2449 gas = j; |
222
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|
2450 } |
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|
2451 |
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|
2452 // usage during stop: |
224 | 2453 // Note: because first gas is not in there, increment gas+1 |
478
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2454 if( deco_usage > 0.0 ) |
265 | 2455 volumes[gas] += (depth*0.1 + 1.0) // depth --> bar. |
2456 * time // in minutes. | |
478
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2457 * deco_usage // in xxx / min @ 1bar. |
265 | 2458 // Plus usage during ascent to the next stop, at 10m/min. |
2459 + (depth*0.1 + 1.0) | |
275
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2460 * ascent*0.1 // metre --> min |
478
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2461 * deco_usage; |
265 | 2462 else |
2463 volumes[gas] = 65535.0; | |
222
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|
2464 } |
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|
2465 |
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|
2466 //---- convert results for the ASM interface ----------------------------- |
338 | 2467 for(i=0; i<NUM_GAS; ++i) |
441
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|
2468 if( volumes[i] > 65534.0 ) |
224 | 2469 int_O_gas_volumes[i] = 65535; |
222
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|
2470 else |
441
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|
2471 int_O_gas_volumes[i] = (unsigned short)(volumes[i] + 0.5); |
116 | 2472 } |
2473 | |
167 | 2474 ////////////////////////////////////////////////////////////////////////////// |
2475 | |
116 | 2476 void deco_push_tissues_to_vault(void) |
2477 { | |
167 | 2478 overlay unsigned char x; |
122
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diff
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|
2479 RESET_C_STACK |
167 | 2480 |
116 | 2481 cns_vault = CNS_fraction; |
339 | 2482 for (x=0;x<NUM_COMP;x++) |
2483 { | |
2484 pres_tissue_N2_vault[x] = pres_tissue_N2[x]; | |
2485 pres_tissue_He_vault[x] = pres_tissue_He[x]; | |
2486 } | |
116 | 2487 } |
167 | 2488 |
116 | 2489 void deco_pull_tissues_from_vault(void) |
2490 { | |
167 | 2491 overlay unsigned char x; |
122
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|
2492 RESET_C_STACK |
167 | 2493 |
339 | 2494 for (x=0; x<NUM_COMP; x++) |
2495 { | |
2496 pres_tissue_N2[x] = pres_tissue_N2_vault[x]; | |
2497 pres_tissue_He[x] = pres_tissue_He_vault[x]; | |
2498 } | |
292 | 2499 |
2500 // Restore both CNS variable, too. | |
2501 CNS_fraction = cns_vault; | |
514 | 2502 char_O_CNS_fraction = (unsigned char)(CNS_fraction * 100.0 + 0.5); |
116 | 2503 } |
2504 | |
167 | 2505 ////////////////////////////////////////////////////////////////////////////// |
2506 // | |
184 | 2507 #ifndef CROSS_COMPILE |
2508 void main() {} | |
2509 #endif |