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annotate Small_CPU/Src/pressure.c @ 500:0d2449e9d659
Added possibility to switch between "classic" bigfont views and a selection with a new information combination
New strings for the selection have been added and the menu handling has been updated to enable the selection.
author | Ideenmodellierer |
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date | Mon, 24 Aug 2020 19:36:18 +0200 |
parents | 9eeab3fead8f |
children | 666cafac87ab |
rev | line source |
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38 | 1 /** |
2 ****************************************************************************** | |
3 * @file pressure.c | |
4 * @author heinrichs weikamp gmbh | |
5 * @date 2014 | |
6 * @version V0.0.2 | |
7 * @since 20-Oct-2016 | |
8 * @brief | |
9 * | |
10 @verbatim | |
11 ============================================================================== | |
12 ##### How to use ##### | |
13 ============================================================================== | |
14 V0.0.2 18-Oct-2016 pressure_calculation_AN520_004_mod_MS5803_30BA__09_2015 | |
15 | |
16 @endverbatim | |
17 ****************************************************************************** | |
18 * @attention | |
19 * | |
20 * <h2><center>© COPYRIGHT(c) 2016 heinrichs weikamp</center></h2> | |
21 * | |
22 ****************************************************************************** | |
23 */ | |
24 | |
25 | |
26 | |
27 /* surface time | |
28 the last 30 minutes will be saved once per minute in a endless loop | |
29 at the beginning of a dive the oldest value will be used | |
30 */ | |
331
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31 #include "math.h" |
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32 #include "scheduler.h" |
38 | 33 #include "pressure.h" |
34 #include "i2c.h" | |
35 #include "rtc.h" | |
36 | |
37 #define CMD_RESET 0x1E // ADC reset command | |
38 #define CMD_ADC_READ 0x00 // ADC read command | |
39 #define CMD_ADC_CONV 0x40 // ADC conversion command | |
40 #define CMD_ADC_D1 0x00 // ADC D1 conversion | |
41 #define CMD_ADC_D2 0x10 // ADC D2 conversion | |
42 #define CMD_ADC_256 0x00 // ADC OSR=256 | |
43 #define CMD_ADC_512 0x02 // ADC OSR=512 | |
44 #define CMD_ADC_1024 0x04 // ADC OSR=1024 | |
45 #define CMD_ADC_2048 0x06 // ADC OSR=2056 | |
46 #define CMD_ADC_4096 0x08 // ADC OSR=4096 | |
47 #define CMD_PROM_RD 0xA0 // Prom read command | |
48 | |
352 | 49 /* remove comment to use a predefined profile for pressure changes instead of real world data */ |
50 /* #define SIMULATE_PRESSURE */ | |
51 | |
52 #define PRESSURE_SURFACE_MAX_MBAR (1030.0f) /* It is unlikely that pressure at surface is greater than this value => clip to it */ | |
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53 |
352 | 54 #define PRESSURE_SURFACE_QUE (30u) /* history buffer [minutes] for past pressure measurements */ |
55 #define PRESSURE_SURFACE_EVA_WINDOW (15u) /* Number of entries evaluated during instability test. Used to avoid detection while dive enters water */ | |
56 #define PRESSURE_SURFACE_STABLE_LIMIT (10u) /* Define pressure as stable if delta (mBar) is below this value */ | |
57 #define PRESSURE_SURFACE_DETECT_STABLE_CNT (5u) /* Event count to detect stable condition */ | |
58 #define PRESSURE_SURFACE_UNSTABLE_LIMIT (50u) /* Define pressure as not stable if delta (mBar) is larger than this value */ | |
59 #define PRESSURE_SURFACE_DETECT_UNSTABLE_CNT (3u) /* Event count to detect unstable condition */ | |
60 | |
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61 |
356 | 62 static uint8_t PRESSURE_ADDRESS = DEVICE_PRESSURE_MS5803; /* Default Address */ |
63 | |
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64 static uint16_t get_ci_by_coef_num(uint8_t coef_num); |
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65 //void pressure_calculation_new(void); |
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66 //void pressure_calculation_old(void); |
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67 static void pressure_calculation_AN520_004_mod_MS5803_30BA__09_2015(void); |
356 | 68 //static uint8_t crc4(uint16_t n_prom[]); |
38 | 69 |
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70 static HAL_StatusTypeDef pressure_sensor_get_data(void); |
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71 static uint32_t get_adc(void); |
38 | 72 uint8_t pressureSensorInitSuccess = 0; |
73 | |
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74 static uint16_t C[8] = { 1 }; |
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75 static uint32_t D1 = 1; |
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76 static uint32_t D2 = 1; |
356 | 77 //static uint8_t n_crc; |
38 | 78 |
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79 static int64_t C5_x_2p8 = 1; |
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80 static int64_t C2_x_2p16 = 1; |
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81 static int64_t C1_x_2p15 = 1; |
38 | 82 |
83 /* | |
84 short C2plus10000 = -1; | |
85 short C3plus200 = -1; | |
86 short C4minus250 = -1; | |
87 short UT1 = -1; | |
88 short C6plus100 = -1; | |
89 */ | |
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90 static float pressure_offset = 0.0; /* Offset value which may be specified by the user via PC Software */ |
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91 static float temperature_offset = 0.0; /* Offset value which may be specified by the user via PC Software */ |
38 | 92 |
186
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93 static float ambient_temperature = 0; |
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94 static float ambient_pressure_mbar = 1000.0; |
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95 static float surface_pressure_mbar = 1000.0; |
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96 static float surface_ring_mbar[PRESSURE_SURFACE_QUE] = { 0 }; |
38 | 97 |
352 | 98 static uint8_t surface_pressure_writeIndex = 0; |
99 static float surface_pressure_stable_value = 0; | |
100 static uint8_t surface_pressure_stable = 0; | |
101 | |
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102 static uint8_t secondCounterSurfaceRing = 0; |
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103 static uint8_t avgCount = 0; |
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104 static float runningAvg = 0; |
38 | 105 |
106 float get_temperature(void) | |
107 { | |
108 return ambient_temperature; | |
109 } | |
110 | |
111 float get_pressure_mbar(void) | |
112 { | |
113 return ambient_pressure_mbar; | |
114 } | |
115 | |
116 float get_surface_mbar(void) | |
117 { | |
118 return surface_pressure_mbar; | |
119 } | |
120 | |
121 | |
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122 void init_surface_ring(uint8_t force) |
38 | 123 { |
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124 if((surface_ring_mbar[0] == 0) || (force)) /* only initialize once. Keep value in place in case of an i2c recovery */ |
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125 { |
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126 secondCounterSurfaceRing = 0; /* restart calculation */ |
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127 avgCount = 0; |
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128 runningAvg = 0; |
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129 |
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130 for(int i=0; i<PRESSURE_SURFACE_QUE; i++) |
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131 surface_ring_mbar[i] = ambient_pressure_mbar; |
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132 surface_pressure_mbar = ambient_pressure_mbar; |
352 | 133 surface_pressure_writeIndex = 0; /* index of the oldest value in the ring buffer */ |
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134 } |
38 | 135 } |
136 | |
352 | 137 uint8_t is_surface_pressure_stable(void) |
138 { | |
139 return surface_pressure_stable; | |
140 } | |
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141 |
352 | 142 float set_last_surface_pressure_stable(void) |
143 { | |
144 surface_pressure_mbar = surface_pressure_stable_value; | |
145 return surface_pressure_stable_value; | |
146 } | |
147 | |
148 /* iterate backward through the history memory and evaluate the changes pressure changes during the last 30 minutes */ | |
149 void evaluate_surface_pressure() | |
150 { | |
151 uint8_t index; | |
152 float lastvalue; | |
153 uint8_t stablecnt = 0; | |
154 uint8_t unstablecnt = 0; | |
155 uint8_t EvaluationWindow = PRESSURE_SURFACE_QUE - PRESSURE_SURFACE_EVA_WINDOW; /* do not use the latest 15 values to avoid unstable condition due to something like fin handling */ | |
156 uint8_t EvaluatedValues = 0; | |
157 | |
158 lastvalue = surface_ring_mbar[surface_pressure_writeIndex]; | |
159 surface_pressure_stable_value = surface_ring_mbar[surface_pressure_writeIndex]; /* default: if no stable value is found return the oldest value */ | |
160 index = surface_pressure_writeIndex; | |
161 surface_pressure_stable = 1; | |
162 | |
163 if(index == 0) | |
164 { | |
165 index = PRESSURE_SURFACE_QUE - 1; | |
166 } | |
167 else | |
168 { | |
169 index = index - 1; | |
170 } | |
171 do | |
172 { | |
173 if((EvaluatedValues < EvaluationWindow) && | |
174 (fabs(surface_pressure_stable_value - surface_ring_mbar[index]) > PRESSURE_SURFACE_UNSTABLE_LIMIT)) /* unusual change during last 30 minutes */ | |
175 { | |
176 unstablecnt++; | |
177 if(unstablecnt > PRESSURE_SURFACE_DETECT_UNSTABLE_CNT) | |
178 { | |
179 surface_pressure_stable = 0; | |
180 } | |
181 } | |
182 /* search for a value which does not change for several iterations */ | |
183 if (fabs(lastvalue - surface_ring_mbar[index]) < PRESSURE_SURFACE_STABLE_LIMIT) | |
184 { | |
185 stablecnt++; | |
186 } | |
187 else | |
188 { | |
189 stablecnt = 0; | |
190 } | |
191 if ((stablecnt >= PRESSURE_SURFACE_DETECT_STABLE_CNT) && (surface_pressure_stable == 0)&&(surface_pressure_stable_value == surface_ring_mbar[surface_pressure_writeIndex])) /* pressure is unstable => search for new stable value */ | |
192 { | |
193 surface_pressure_stable_value = surface_ring_mbar[index]; | |
194 unstablecnt = 0; | |
195 } | |
196 | |
197 lastvalue = surface_ring_mbar[index]; | |
198 | |
199 if(index == 0) | |
200 { | |
201 index = PRESSURE_SURFACE_QUE - 1; | |
202 } | |
203 else | |
204 { | |
205 index = index - 1; | |
206 } | |
207 EvaluatedValues++; | |
208 } while (index != surface_pressure_writeIndex); | |
209 } | |
38 | 210 void update_surface_pressure(uint8_t call_rhythm_seconds) |
211 { | |
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212 if(is_init_pressure_done()) |
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213 { |
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214 runningAvg = (runningAvg * avgCount + ambient_pressure_mbar) / (avgCount +1); |
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215 avgCount++; |
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216 secondCounterSurfaceRing += call_rhythm_seconds; |
38 | 217 |
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218 if(secondCounterSurfaceRing >= 60) |
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219 { |
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220 if(runningAvg < PRESSURE_SURFACE_MAX_MBAR) |
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221 { |
352 | 222 surface_ring_mbar[surface_pressure_writeIndex] = runningAvg; |
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223 } |
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224 else |
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225 { |
352 | 226 surface_ring_mbar[surface_pressure_writeIndex] = PRESSURE_SURFACE_MAX_MBAR; |
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227 } |
352 | 228 surface_pressure_writeIndex++; /* the write index is now pointing to the oldest value in the buffer which will be overwritten next time */ |
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229 |
352 | 230 if(surface_pressure_writeIndex == PRESSURE_SURFACE_QUE) |
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231 { |
352 | 232 surface_pressure_writeIndex = 0; |
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233 } |
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234 |
352 | 235 surface_pressure_mbar = surface_ring_mbar[surface_pressure_writeIndex]; /* 30 minutes old measurement */ |
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236 |
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237 secondCounterSurfaceRing = 0; |
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238 avgCount = 1; /* use the current value as starting point but restart the weight decrement of the measurements */ |
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239 } |
352 | 240 evaluate_surface_pressure(); |
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241 } |
38 | 242 } |
243 | |
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244 #ifdef DEMOMODE |
38 | 245 float demo_modify_temperature_helper(float bottom_mbar_diff_to_surface) |
246 { | |
247 const float temperature_surface = 31.0; | |
248 const float temperature_bottom = 14.0; | |
249 | |
250 const float temperature_difference = temperature_bottom - temperature_surface; | |
251 | |
252 // range 0.0 - 1.0 | |
253 float position_now = (ambient_pressure_mbar - surface_pressure_mbar) / bottom_mbar_diff_to_surface; | |
254 | |
255 if(position_now <= 0) | |
256 return temperature_surface; | |
257 | |
258 if(position_now >= 1) | |
259 return temperature_bottom; | |
260 | |
261 return temperature_surface + (temperature_difference * position_now); | |
262 } | |
263 | |
264 | |
265 uint32_t demo_modify_temperature_and_pressure(int32_t divetime_in_seconds, uint8_t subseconds, float ceiling_mbar) | |
266 { | |
267 | |
268 const float descent_rate = 4000/60; | |
269 const float ascent_rate = 1000/60; | |
270 const uint32_t seconds_descend = (1 * 60) + 30; | |
271 const uint32_t turbo_seconds_at_bottom_start = (0 * 60) + 0; | |
272 const uint32_t seconds_descend_and_bottomtime = seconds_descend + turbo_seconds_at_bottom_start + (2 * 60) + 0; | |
273 uint32_t time_elapsed_in_seconds; | |
274 static float ambient_pressure_mbar_memory = 0; | |
275 static uint32_t time_last_call = 0; | |
276 | |
277 if(divetime_in_seconds <= seconds_descend) | |
278 { | |
279 ambient_pressure_mbar = (divetime_in_seconds * descent_rate) + ((float)(subseconds) * descent_rate) + surface_pressure_mbar; | |
280 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
281 | |
282 time_last_call = divetime_in_seconds; | |
283 return 0; | |
284 } | |
285 else | |
286 if(divetime_in_seconds <= seconds_descend + turbo_seconds_at_bottom_start) | |
287 { | |
288 ambient_pressure_mbar = (seconds_descend * descent_rate) + surface_pressure_mbar; | |
289 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
290 ambient_pressure_mbar_memory = ambient_pressure_mbar; | |
291 time_last_call = divetime_in_seconds; | |
292 return turbo_seconds_at_bottom_start; | |
293 } | |
294 else | |
295 if(divetime_in_seconds <= seconds_descend_and_bottomtime) | |
296 { | |
297 ambient_pressure_mbar = (seconds_descend * descent_rate) + surface_pressure_mbar; | |
298 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
299 ambient_pressure_mbar_memory = ambient_pressure_mbar; | |
300 time_last_call = divetime_in_seconds; | |
301 return 0; | |
302 } | |
303 else | |
304 { | |
305 time_elapsed_in_seconds = divetime_in_seconds - time_last_call; | |
306 ambient_pressure_mbar = ambient_pressure_mbar_memory - time_elapsed_in_seconds * ascent_rate; | |
307 | |
308 if(ambient_pressure_mbar < surface_pressure_mbar) | |
309 ambient_pressure_mbar = surface_pressure_mbar; | |
310 else if(ambient_pressure_mbar < ceiling_mbar) | |
311 ambient_pressure_mbar = ceiling_mbar; | |
312 | |
313 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
314 ambient_pressure_mbar_memory = ambient_pressure_mbar; | |
315 time_last_call = divetime_in_seconds; | |
316 return 0; | |
317 } | |
318 } | |
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319 #endif |
38 | 320 |
321 uint8_t is_init_pressure_done(void) | |
322 { | |
323 return pressureSensorInitSuccess; | |
324 } | |
325 | |
326 uint8_t init_pressure(void) | |
327 { | |
328 uint8_t buffer[1]; | |
356 | 329 buffer[0] = 0x1E; // Reset Command |
38 | 330 uint8_t retValue = 0xFF; |
331 | |
331
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332 pressureSensorInitSuccess = false; |
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333 |
356 | 334 /* Probe new sensor first */ |
335 retValue = I2C_Master_Transmit( DEVICE_PRESSURE_MS5837, buffer, 1); | |
336 if(retValue != HAL_OK) | |
337 { | |
338 PRESSURE_ADDRESS = DEVICE_PRESSURE_MS5803; // use old sensor | |
339 HAL_Delay(100); | |
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340 I2C_DeInit(); |
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341 HAL_Delay(100); |
356 | 342 MX_I2C1_Init(); |
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343 HAL_Delay(100); |
356 | 344 } |
345 else | |
346 { | |
347 PRESSURE_ADDRESS = DEVICE_PRESSURE_MS5837; // Success, use new sensor | |
348 } | |
349 HAL_Delay(3); //2.8ms according to datasheet | |
350 | |
351 buffer[0] = 0x1E; // Reset Command | |
352 retValue = 0xFF; | |
353 | |
331
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354 /* Send reset request to pressure sensor */ |
356 | 355 retValue = I2C_Master_Transmit( PRESSURE_ADDRESS, buffer, 1); |
38 | 356 if(retValue != HAL_OK) |
357 { | |
358 return (HAL_StatusTypeDef)retValue; | |
359 } | |
356 | 360 HAL_Delay(3); //2.8ms according to datasheet |
38 | 361 |
356 | 362 for(uint8_t i=0;i<7;i++) |
38 | 363 { |
364 C[i] = get_ci_by_coef_num(i); | |
365 } | |
356 | 366 // n_crc = crc4(C); // no evaluation at the moment hw 151026 |
38 | 367 |
368 C5_x_2p8 = C[5] * 256; | |
369 C2_x_2p16 = C[2] * 65536; | |
370 C1_x_2p15 = C[1] * 32768; | |
371 | |
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372 if(global.I2C_SystemStatus == HAL_OK) |
38 | 373 { |
374 pressureSensorInitSuccess = 1; | |
331
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375 retValue = pressure_update(); |
38 | 376 } |
331
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377 return retValue; |
38 | 378 } |
379 | |
380 | |
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381 static uint32_t get_adc(void) |
38 | 382 { |
383 uint8_t buffer[1]; | |
384 uint8_t resivebuf[4]; | |
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385 uint32_t answer = 0xFFFFFFFF; |
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386 |
38 | 387 buffer[0] = 0x00; // Get ADC |
474
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388 if(I2C_Master_Transmit( PRESSURE_ADDRESS, buffer, 1) == HAL_OK) |
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389 { |
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390 if(I2C_Master_Receive( PRESSURE_ADDRESS, resivebuf, 4) == HAL_OK) |
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391 { |
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392 resivebuf[3] = 0; |
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393 answer = 256*256 *(uint32_t)resivebuf[0] + 256 * (uint32_t)resivebuf[1] + (uint32_t)resivebuf[2]; |
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394 } |
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395 } |
38 | 396 return answer; |
397 } | |
398 | |
399 | |
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400 static uint16_t get_ci_by_coef_num(uint8_t coef_num) |
38 | 401 { |
402 uint8_t resivebuf[2]; | |
403 | |
404 uint8_t cmd = CMD_PROM_RD+coef_num*2; | |
356 | 405 I2C_Master_Transmit( PRESSURE_ADDRESS, &cmd, 1); |
406 I2C_Master_Receive( PRESSURE_ADDRESS, resivebuf, 2); | |
38 | 407 return (256*(uint16_t)resivebuf[0]) + (uint16_t)resivebuf[1]; |
408 } | |
409 | |
410 | |
411 | |
412 uint8_t pressure_update(void) | |
413 { | |
414 HAL_StatusTypeDef statusReturn = HAL_TIMEOUT; | |
415 | |
416 statusReturn = pressure_sensor_get_data(); | |
417 pressure_calculation(); | |
418 return (uint8_t)statusReturn; | |
419 } | |
420 | |
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421 /* Switch between pressure and temperature measurement with every successful read operation */ |
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422 void pressure_update_alternating(void) |
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423 { |
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424 static uint8_t getTemperature= 0; |
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425 |
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426 if(getTemperature) |
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427 { |
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428 if(pressure_sensor_get_temperature_raw() == HAL_OK) |
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429 { |
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430 getTemperature = 0; |
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431 } |
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432 } |
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433 else |
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434 { |
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435 if(pressure_sensor_get_pressure_raw() == HAL_OK) |
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436 { |
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437 getTemperature = 1; |
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438 } |
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439 } |
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440 pressure_calculation(); |
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441 return; |
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442 } |
38 | 443 |
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444 static uint32_t pressure_sensor_get_one_value(uint8_t cmd, HAL_StatusTypeDef *statusReturn) |
38 | 445 { |
446 uint8_t command = CMD_ADC_CONV + cmd; | |
474
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447 uint32_t adcValue = 0; |
38 | 448 HAL_StatusTypeDef statusReturnTemp = HAL_TIMEOUT; |
449 | |
356 | 450 statusReturnTemp = I2C_Master_Transmit( PRESSURE_ADDRESS, &command, 1); |
38 | 451 |
452 if(statusReturn) | |
453 { | |
454 *statusReturn = statusReturnTemp; | |
455 } | |
479 | 456 |
457 switch (cmd & 0x0f) // wait necessary conversion time | |
38 | 458 { |
488
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459 case CMD_ADC_256 : HAL_Delay(2); break; |
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460 case CMD_ADC_512 : HAL_Delay(4); break; |
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461 case CMD_ADC_1024: HAL_Delay(5); break; |
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462 case CMD_ADC_2048: HAL_Delay(7); break; |
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463 case CMD_ADC_4096: HAL_Delay(11); break; |
479 | 464 default: |
465 break; | |
466 } | |
467 adcValue = get_adc(); | |
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468 /* if(adcValue == 0xFFFFFFFF) |
479 | 469 { |
470 if(statusReturn) | |
474
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471 { |
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472 *statusReturn = HAL_ERROR; |
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473 } |
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474 }*/ |
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475 |
474
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476 return adcValue; |
38 | 477 } |
478 | |
479 | |
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480 static HAL_StatusTypeDef pressure_sensor_get_data(void) |
38 | 481 { |
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482 uint32_t requestedValue = 0; |
38 | 483 HAL_StatusTypeDef statusReturn1 = HAL_TIMEOUT; |
484 HAL_StatusTypeDef statusReturn2 = HAL_TIMEOUT; | |
485 | |
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486 |
38 | 487 |
488
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488 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D2 + CMD_ADC_4096, &statusReturn2); |
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489 if (statusReturn2 == HAL_OK) |
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490 { |
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491 D2 = requestedValue; |
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492 } |
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493 |
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494 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D1 + CMD_ADC_4096, &statusReturn1); |
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495 if (statusReturn1 == HAL_OK) |
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496 { |
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497 D1 = requestedValue; |
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498 } |
38 | 499 if(statusReturn2 > statusReturn1) // if anything is not HAL_OK (0x00) or worse |
500 return statusReturn2; | |
501 else | |
502 return statusReturn1; | |
503 } | |
504 | |
505 | |
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506 HAL_StatusTypeDef pressure_sensor_get_pressure_raw(void) |
38 | 507 { |
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508 uint32_t requestedValue = 0; |
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509 HAL_StatusTypeDef statusReturn = HAL_TIMEOUT; |
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510 |
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511 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D1 + CMD_ADC_4096, &statusReturn); |
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512 if (statusReturn == HAL_OK) |
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513 { |
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514 D1 = requestedValue; |
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515 } |
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516 |
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517 return statusReturn; |
38 | 518 } |
519 | |
520 | |
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521 HAL_StatusTypeDef pressure_sensor_get_temperature_raw(void) |
38 | 522 { |
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523 uint32_t requestedValue = 0; |
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524 HAL_StatusTypeDef statusReturn = HAL_TIMEOUT; |
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525 |
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526 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D2 + CMD_ADC_4096, &statusReturn); |
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527 if (statusReturn == HAL_OK) |
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528 { |
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529 D2 = requestedValue; |
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530 } |
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531 return statusReturn; |
38 | 532 } |
533 | |
534 | |
352 | 535 #ifdef SIMULATE_PRESSURE |
536 void pressure_simulation() | |
537 { | |
538 static uint32_t tickstart = 0; | |
539 static float pressure_sim_mbar = 0; | |
540 static uint32_t passedSecond = 0; | |
541 static uint32_t secondtick = 0; | |
542 | |
543 uint32_t lasttick = 0; | |
544 | |
545 | |
546 | |
547 if( tickstart == 0) | |
548 { | |
549 tickstart = HAL_GetTick(); /* init time stamp */ | |
550 secondtick = tickstart; | |
551 pressure_sim_mbar = 1000; | |
552 } | |
553 | |
554 lasttick = HAL_GetTick(); | |
555 if(time_elapsed_ms(secondtick,lasttick) > 1000) /* one second passed since last tick */ | |
556 { | |
557 secondtick = lasttick; | |
558 passedSecond++; | |
559 | |
560 #ifdef DIVE_AFTER_LANDING | |
561 if(passedSecond < 10) pressure_sim_mbar = 1000.0; /* stay stable for 10 seconds */ | |
562 else if(passedSecond < 300) pressure_sim_mbar -= 1.0; /* decrease pressure in 5 minutes target 770mbar => delta 330 */ | |
563 else if(passedSecond < 900) pressure_sim_mbar += 0.0; /*stay stable 10 minutes*/ | |
564 else if(passedSecond < 1500) pressure_sim_mbar += 0.5; /* return to 1 bar in 10 Minutes*/ | |
565 else if(passedSecond < 1800) pressure_sim_mbar += 0.0; /* 5 minutes break */ | |
566 else if(passedSecond < 2000) pressure_sim_mbar += 10.0; /* start dive */ | |
567 else if(passedSecond < 2300) pressure_sim_mbar += 0.0; /* stay on depth */ | |
568 else if(passedSecond < 2500) pressure_sim_mbar -= 10.0; /* return to surface */ | |
569 else pressure_sim_mbar = 1000.0; /* final state */ | |
570 #else /* short dive */ | |
571 if(passedSecond < 10) pressure_sim_mbar = 1000.0; /* stay stable for 10 seconds */ | |
572 else if(passedSecond < 180) pressure_sim_mbar += 10.0; /* Start dive */ | |
573 else if(passedSecond < 300) pressure_sim_mbar += 0.0; /*stay on depth*/ | |
574 else if(passedSecond < 460) pressure_sim_mbar -= 10.0; /* return to surface */ | |
575 else if(passedSecond < 600) pressure_sim_mbar += 0.0; /* stay */ | |
576 else if(passedSecond < 610) pressure_sim_mbar = 1000.0; /* get ready for second dive */ | |
577 else if(passedSecond < 780) pressure_sim_mbar += 10.0; /* Start dive */ | |
578 else if(passedSecond < 900) pressure_sim_mbar += 0.0; /*stay on depth*/ | |
579 else if(passedSecond < 1060) pressure_sim_mbar -= 10.0; /* return to surface */ | |
580 else if(passedSecond < 1200) pressure_sim_mbar += 0.0; /* stay */ | |
581 else pressure_sim_mbar = 1000.0; /* final state */ | |
582 #endif | |
583 } | |
584 | |
585 | |
586 ambient_pressure_mbar = pressure_sim_mbar; | |
587 ambient_temperature = 25.0; | |
588 return; | |
589 } | |
590 | |
591 #endif | |
592 | |
38 | 593 void pressure_calculation(void) |
594 { | |
241
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595 if(global.I2C_SystemStatus != HAL_OK) |
38 | 596 return; |
352 | 597 |
598 #ifdef SIMULATE_PRESSURE | |
599 pressure_simulation(); | |
600 #else | |
38 | 601 pressure_calculation_AN520_004_mod_MS5803_30BA__09_2015(); |
352 | 602 #endif |
38 | 603 } |
604 | |
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605 static void pressure_calculation_AN520_004_mod_MS5803_30BA__09_2015(void) |
38 | 606 { |
335
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607 static float runningAvg = 0; |
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608 static uint8_t avgCnt = 0; |
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609 |
38 | 610 uint32_t local_D1; // ADC value of the pressure conversion |
611 uint32_t local_D2; // ADC value of the temperature conversion | |
612 int32_t local_Px10; // compensated pressure value | |
613 int32_t local_Tx100; // compensated temperature value | |
614 int64_t local_dT; // int32_t, difference between actual and measured temperature | |
615 int64_t local_OFF; // offset at actual temperature | |
616 int64_t local_SENS; // sensitivity at actual temperature | |
617 | |
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618 float calc_pressure; |
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619 |
38 | 620 int64_t T2; |
621 int64_t OFF2; | |
622 int64_t SENS2; | |
623 | |
624 local_D1 = D1; | |
625 local_D2 = D2; | |
626 | |
627 local_dT = ((int64_t)local_D2) - ((int64_t)C[5]) * 256; //pow(2,8); | |
628 local_OFF = ((int64_t)C[2]) * 65536 + local_dT * ((int64_t)C[4]) / 128; // pow(2,16), pow(2,7) | |
629 local_SENS = ((int64_t)C[1]) * 32768 + local_dT * ((int64_t)C[3]) / 256; // pow(2,15), pow(2,8) | |
630 | |
631 local_Tx100 = (int32_t)(2000 + (local_dT * ((int64_t)C[6])) / 8388608);// pow(2,23) | |
632 | |
633 | |
634 if(local_Tx100 < 2000) // low temperature | |
635 { | |
636 T2 = 3 * local_dT; | |
637 T2 *= local_dT; | |
638 T2 /= 8589934592; | |
639 | |
640 OFF2 = ((int64_t)local_Tx100) - 2000; | |
641 OFF2 *= OFF2; | |
642 OFF2 *= 3; | |
643 OFF2 /= 2; | |
644 | |
645 SENS2 = ((int64_t)local_Tx100) - 2000; | |
646 SENS2 *= SENS2; | |
647 SENS2 *= 5; | |
648 SENS2 /= 8; | |
649 | |
650 local_Tx100 -= (int32_t)T2; | |
651 local_OFF -= OFF2; | |
652 local_SENS -= SENS2; | |
653 } | |
654 else | |
655 { | |
656 T2 = 7 * local_dT; | |
657 T2 *= local_dT; | |
658 T2 /= 137438953472; | |
659 | |
660 OFF2 = ((int64_t)local_Tx100) - 2000; | |
661 OFF2 *= OFF2; | |
662 OFF2 /= 16; | |
663 | |
664 local_Tx100 -= (int32_t)T2; | |
665 local_OFF -= OFF2; | |
666 } | |
667 | |
668 local_Px10 = (int32_t)( | |
669 (((int64_t)((local_D1 * local_SENS) / 2097152)) - local_OFF) | |
670 / 8192 );// )) / 10; // pow(2,21), pow(2,13) | |
671 | |
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672 ambient_temperature = ((float)local_Tx100) / 100; |
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673 ambient_temperature += temperature_offset; |
331
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674 |
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675 calc_pressure = ((float)local_Px10) / 10; |
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676 calc_pressure += pressure_offset; |
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677 |
480 | 678 runningAvg = (avgCnt * runningAvg + calc_pressure) / (avgCnt + 1); |
679 if (avgCnt < 10) /* build an average considering the last measurements to have a weight "1 of 10" */ | |
680 { /* Main reason for this is the jitter of up to +-10 HPa in surface mode which is caused */ | |
681 avgCnt++; /* by the measurement range of the sensor which is focused on under water pressure measurement */ | |
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682 } |
480 | 683 ambient_pressure_mbar = runningAvg; |
38 | 684 } |
685 | |
686 | |
687 /* taken from AN520 by meas-spec.com dated 9. Aug. 2011 | |
688 * short and int are both 16bit according to AVR/GCC google results | |
689 */ | |
356 | 690 /*static uint8_t crc4(uint16_t n_prom[]) |
38 | 691 { |
692 uint16_t cnt; // simple counter | |
693 uint16_t n_rem; // crc reminder | |
694 uint16_t crc_read; // original value of the crc | |
695 uint8_t n_bit; | |
696 n_rem = 0x00; | |
697 crc_read=n_prom[7]; //save read CRC | |
698 n_prom[7]=(0xFF00 & (n_prom[7])); //CRC byte is replaced by 0 | |
699 for (cnt = 0; cnt < 16; cnt++) // operation is performed on bytes | |
700 { // choose LSB or MSB | |
701 if (cnt%2==1) n_rem ^= (uint16_t) ((n_prom[cnt>>1]) & 0x00FF); | |
702 else n_rem ^= (uint16_t) (n_prom[cnt>>1]>>8); | |
703 for (n_bit = 8; n_bit > 0; n_bit--) | |
704 { | |
705 if (n_rem & (0x8000)) | |
706 { | |
707 n_rem = (n_rem << 1) ^ 0x3000; | |
708 } | |
709 else | |
710 { | |
711 n_rem = (n_rem << 1); | |
712 } | |
713 } | |
714 } | |
715 n_rem= (0x000F & (n_rem >> 12)); // // final 4-bit reminder is CRC code | |
716 n_prom[7]=crc_read; // restore the crc_read to its original place | |
717 return (n_rem ^ 0x00); | |
718 } | |
356 | 719 |
38 | 720 void test_calculation(void) |
721 { | |
722 C1 = 29112; | |
723 C2 = 26814; | |
724 C3 = 19125; | |
725 C4 = 17865; | |
726 C5 = 32057; | |
727 C6 = 31305; | |
728 | |
729 C2_x_2p16 = C2 * 65536; | |
730 C1_x_2p15 = C1 * 32768; | |
731 | |
732 D1 = 4944364; | |
733 D2 = 8198974; | |
734 pressure_calculation() ; | |
735 }; | |
736 */ | |
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737 void pressure_set_offset (float pressureOffset, float temperatureOffset) |
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738 { |
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739 if(pressure_offset != pressureOffset) /* we received a new value => reinit surface que */ |
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740 { |
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741 ambient_pressure_mbar -= pressure_offset; /* revert old value */ |
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742 ambient_pressure_mbar += pressureOffset; /* apply new offset */ |
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743 init_surface_ring(1); |
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744 } |
38 | 745 |
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746 pressure_offset = pressureOffset; |
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747 temperature_offset = temperatureOffset; |
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748 } |
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749 |
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750 |