Mercurial > public > ostc4
annotate Small_CPU/Src/pressure.c @ 422:b67327177159 ImprovmentNVM_2
Moved Timeout handling out of 100ms callback:
Handling of the timeout is not timecritical and may be done in the main loop. This was needed because writing of flash data shall be done before going to sleep. Having this function in the timer callback would raise the risk of flash inconsitencies due to parallel calls out of the main loop
=> Created a separate function containing the old timeout detection functionality
| author | ideenmodellierer |
|---|---|
| date | Mon, 10 Feb 2020 19:29:12 +0100 |
| parents | 6f30f2011667 |
| children | 4be72d55b09a |
| rev | line source |
|---|---|
| 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 */ | |
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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 */ | |
| 53 #define PRESSURE_HISTORY_SIZE (8u) | |
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54 |
| 352 | 55 #define PRESSURE_SURFACE_QUE (30u) /* history buffer [minutes] for past pressure measurements */ |
| 56 #define PRESSURE_SURFACE_EVA_WINDOW (15u) /* Number of entries evaluated during instability test. Used to avoid detection while dive enters water */ | |
| 57 #define PRESSURE_SURFACE_STABLE_LIMIT (10u) /* Define pressure as stable if delta (mBar) is below this value */ | |
| 58 #define PRESSURE_SURFACE_DETECT_STABLE_CNT (5u) /* Event count to detect stable condition */ | |
| 59 #define PRESSURE_SURFACE_UNSTABLE_LIMIT (50u) /* Define pressure as not stable if delta (mBar) is larger than this value */ | |
| 60 #define PRESSURE_SURFACE_DETECT_UNSTABLE_CNT (3u) /* Event count to detect unstable condition */ | |
| 61 | |
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62 |
| 356 | 63 static uint8_t PRESSURE_ADDRESS = DEVICE_PRESSURE_MS5803; /* Default Address */ |
| 64 | |
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65 static uint16_t get_ci_by_coef_num(uint8_t coef_num); |
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66 //void pressure_calculation_new(void); |
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67 //void pressure_calculation_old(void); |
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68 static void pressure_calculation_AN520_004_mod_MS5803_30BA__09_2015(void); |
| 356 | 69 //static uint8_t crc4(uint16_t n_prom[]); |
| 38 | 70 |
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71 static HAL_StatusTypeDef pressure_sensor_get_data(void); |
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72 static uint32_t get_adc(void); |
| 38 | 73 uint8_t pressureSensorInitSuccess = 0; |
| 74 | |
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75 static uint16_t C[8] = { 1 }; |
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76 static uint32_t D1 = 1; |
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77 static uint32_t D2 = 1; |
| 356 | 78 //static uint8_t n_crc; |
| 38 | 79 |
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80 static int64_t C5_x_2p8 = 1; |
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81 static int64_t C2_x_2p16 = 1; |
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82 static int64_t C1_x_2p15 = 1; |
| 38 | 83 |
| 84 /* | |
| 85 short C2plus10000 = -1; | |
| 86 short C3plus200 = -1; | |
| 87 short C4minus250 = -1; | |
| 88 short UT1 = -1; | |
| 89 short C6plus100 = -1; | |
| 90 */ | |
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91 static float pressure_offset = 0.0; /* Offset value which may be specified by the user via PC Software */ |
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92 static float temperature_offset = 0.0; /* Offset value which may be specified by the user via PC Software */ |
| 38 | 93 |
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94 static float ambient_temperature = 0; |
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95 static float ambient_pressure_mbar = 1000.0; |
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96 static float surface_pressure_mbar = 1000.0; |
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97 static float surface_ring_mbar[PRESSURE_SURFACE_QUE] = { 0 }; |
| 38 | 98 |
| 352 | 99 static uint8_t surface_pressure_writeIndex = 0; |
| 100 static float surface_pressure_stable_value = 0; | |
| 101 static uint8_t surface_pressure_stable = 0; | |
| 102 | |
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103 static float pressure_history_mbar[PRESSURE_HISTORY_SIZE]; |
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104 |
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105 static uint8_t secondCounterSurfaceRing = 0; |
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106 static uint8_t avgCount = 0; |
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107 static float runningAvg = 0; |
| 38 | 108 |
| 109 float get_temperature(void) | |
| 110 { | |
| 111 return ambient_temperature; | |
| 112 } | |
| 113 | |
| 114 float get_pressure_mbar(void) | |
| 115 { | |
| 116 return ambient_pressure_mbar; | |
| 117 } | |
| 118 | |
| 119 float get_surface_mbar(void) | |
| 120 { | |
| 121 return surface_pressure_mbar; | |
| 122 } | |
| 123 | |
| 124 | |
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125 void init_surface_ring(uint8_t force) |
| 38 | 126 { |
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127 if((surface_ring_mbar[0] == 0) || (force)) /* only initialize once. Keep value in place in case of an i2c recovery */ |
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128 { |
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129 secondCounterSurfaceRing = 0; /* restart calculation */ |
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130 avgCount = 0; |
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131 runningAvg = 0; |
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132 |
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133 for(int i=0; i<PRESSURE_SURFACE_QUE; i++) |
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134 surface_ring_mbar[i] = ambient_pressure_mbar; |
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135 surface_pressure_mbar = ambient_pressure_mbar; |
| 352 | 136 surface_pressure_writeIndex = 0; /* index of the oldest value in the ring buffer */ |
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137 } |
| 38 | 138 } |
| 139 | |
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140 void init_pressure_history(void) |
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141 { |
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142 for(int i=0; i<PRESSURE_HISTORY_SIZE; i++) |
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143 { |
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144 pressure_history_mbar[i] = 1000.0; |
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145 } |
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146 } |
| 38 | 147 |
| 352 | 148 uint8_t is_surface_pressure_stable(void) |
| 149 { | |
| 150 return surface_pressure_stable; | |
| 151 } | |
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152 |
| 352 | 153 float set_last_surface_pressure_stable(void) |
| 154 { | |
| 155 surface_pressure_mbar = surface_pressure_stable_value; | |
| 156 return surface_pressure_stable_value; | |
| 157 } | |
| 158 | |
| 159 /* iterate backward through the history memory and evaluate the changes pressure changes during the last 30 minutes */ | |
| 160 void evaluate_surface_pressure() | |
| 161 { | |
| 162 uint8_t index; | |
| 163 float lastvalue; | |
| 164 uint8_t stablecnt = 0; | |
| 165 uint8_t unstablecnt = 0; | |
| 166 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 */ | |
| 167 uint8_t EvaluatedValues = 0; | |
| 168 | |
| 169 lastvalue = surface_ring_mbar[surface_pressure_writeIndex]; | |
| 170 surface_pressure_stable_value = surface_ring_mbar[surface_pressure_writeIndex]; /* default: if no stable value is found return the oldest value */ | |
| 171 index = surface_pressure_writeIndex; | |
| 172 surface_pressure_stable = 1; | |
| 173 | |
| 174 if(index == 0) | |
| 175 { | |
| 176 index = PRESSURE_SURFACE_QUE - 1; | |
| 177 } | |
| 178 else | |
| 179 { | |
| 180 index = index - 1; | |
| 181 } | |
| 182 do | |
| 183 { | |
| 184 if((EvaluatedValues < EvaluationWindow) && | |
| 185 (fabs(surface_pressure_stable_value - surface_ring_mbar[index]) > PRESSURE_SURFACE_UNSTABLE_LIMIT)) /* unusual change during last 30 minutes */ | |
| 186 { | |
| 187 unstablecnt++; | |
| 188 if(unstablecnt > PRESSURE_SURFACE_DETECT_UNSTABLE_CNT) | |
| 189 { | |
| 190 surface_pressure_stable = 0; | |
| 191 } | |
| 192 } | |
| 193 /* search for a value which does not change for several iterations */ | |
| 194 if (fabs(lastvalue - surface_ring_mbar[index]) < PRESSURE_SURFACE_STABLE_LIMIT) | |
| 195 { | |
| 196 stablecnt++; | |
| 197 } | |
| 198 else | |
| 199 { | |
| 200 stablecnt = 0; | |
| 201 } | |
| 202 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 */ | |
| 203 { | |
| 204 surface_pressure_stable_value = surface_ring_mbar[index]; | |
| 205 unstablecnt = 0; | |
| 206 } | |
| 207 | |
| 208 lastvalue = surface_ring_mbar[index]; | |
| 209 | |
| 210 if(index == 0) | |
| 211 { | |
| 212 index = PRESSURE_SURFACE_QUE - 1; | |
| 213 } | |
| 214 else | |
| 215 { | |
| 216 index = index - 1; | |
| 217 } | |
| 218 EvaluatedValues++; | |
| 219 } while (index != surface_pressure_writeIndex); | |
| 220 } | |
| 38 | 221 void update_surface_pressure(uint8_t call_rhythm_seconds) |
| 222 { | |
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223 |
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224 |
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225 if(is_init_pressure_done()) |
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226 { |
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227 runningAvg = (runningAvg * avgCount + ambient_pressure_mbar) / (avgCount +1); |
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228 avgCount++; |
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229 secondCounterSurfaceRing += call_rhythm_seconds; |
| 38 | 230 |
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231 if(secondCounterSurfaceRing >= 60) |
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232 { |
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233 if(runningAvg < PRESSURE_SURFACE_MAX_MBAR) |
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234 { |
| 352 | 235 surface_ring_mbar[surface_pressure_writeIndex] = runningAvg; |
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236 } |
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237 else |
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238 { |
| 352 | 239 surface_ring_mbar[surface_pressure_writeIndex] = PRESSURE_SURFACE_MAX_MBAR; |
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240 } |
| 352 | 241 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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242 |
| 352 | 243 if(surface_pressure_writeIndex == PRESSURE_SURFACE_QUE) |
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244 { |
| 352 | 245 surface_pressure_writeIndex = 0; |
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246 } |
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247 |
| 352 | 248 surface_pressure_mbar = surface_ring_mbar[surface_pressure_writeIndex]; /* 30 minutes old measurement */ |
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249 |
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250 secondCounterSurfaceRing = 0; |
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251 avgCount = 1; /* use the current value as starting point but restart the weight decrement of the measurements */ |
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252 } |
| 352 | 253 evaluate_surface_pressure(); |
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254 } |
| 38 | 255 } |
| 256 | |
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257 #ifdef DEMOMODE |
| 38 | 258 float demo_modify_temperature_helper(float bottom_mbar_diff_to_surface) |
| 259 { | |
| 260 const float temperature_surface = 31.0; | |
| 261 const float temperature_bottom = 14.0; | |
| 262 | |
| 263 const float temperature_difference = temperature_bottom - temperature_surface; | |
| 264 | |
| 265 // range 0.0 - 1.0 | |
| 266 float position_now = (ambient_pressure_mbar - surface_pressure_mbar) / bottom_mbar_diff_to_surface; | |
| 267 | |
| 268 if(position_now <= 0) | |
| 269 return temperature_surface; | |
| 270 | |
| 271 if(position_now >= 1) | |
| 272 return temperature_bottom; | |
| 273 | |
| 274 return temperature_surface + (temperature_difference * position_now); | |
| 275 } | |
| 276 | |
| 277 | |
| 278 uint32_t demo_modify_temperature_and_pressure(int32_t divetime_in_seconds, uint8_t subseconds, float ceiling_mbar) | |
| 279 { | |
| 280 | |
| 281 const float descent_rate = 4000/60; | |
| 282 const float ascent_rate = 1000/60; | |
| 283 const uint32_t seconds_descend = (1 * 60) + 30; | |
| 284 const uint32_t turbo_seconds_at_bottom_start = (0 * 60) + 0; | |
| 285 const uint32_t seconds_descend_and_bottomtime = seconds_descend + turbo_seconds_at_bottom_start + (2 * 60) + 0; | |
| 286 uint32_t time_elapsed_in_seconds; | |
| 287 static float ambient_pressure_mbar_memory = 0; | |
| 288 static uint32_t time_last_call = 0; | |
| 289 | |
| 290 if(divetime_in_seconds <= seconds_descend) | |
| 291 { | |
| 292 ambient_pressure_mbar = (divetime_in_seconds * descent_rate) + ((float)(subseconds) * descent_rate) + surface_pressure_mbar; | |
| 293 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
| 294 | |
| 295 time_last_call = divetime_in_seconds; | |
| 296 return 0; | |
| 297 } | |
| 298 else | |
| 299 if(divetime_in_seconds <= seconds_descend + turbo_seconds_at_bottom_start) | |
| 300 { | |
| 301 ambient_pressure_mbar = (seconds_descend * descent_rate) + surface_pressure_mbar; | |
| 302 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
| 303 ambient_pressure_mbar_memory = ambient_pressure_mbar; | |
| 304 time_last_call = divetime_in_seconds; | |
| 305 return turbo_seconds_at_bottom_start; | |
| 306 } | |
| 307 else | |
| 308 if(divetime_in_seconds <= seconds_descend_and_bottomtime) | |
| 309 { | |
| 310 ambient_pressure_mbar = (seconds_descend * descent_rate) + surface_pressure_mbar; | |
| 311 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
| 312 ambient_pressure_mbar_memory = ambient_pressure_mbar; | |
| 313 time_last_call = divetime_in_seconds; | |
| 314 return 0; | |
| 315 } | |
| 316 else | |
| 317 { | |
| 318 time_elapsed_in_seconds = divetime_in_seconds - time_last_call; | |
| 319 ambient_pressure_mbar = ambient_pressure_mbar_memory - time_elapsed_in_seconds * ascent_rate; | |
| 320 | |
| 321 if(ambient_pressure_mbar < surface_pressure_mbar) | |
| 322 ambient_pressure_mbar = surface_pressure_mbar; | |
| 323 else if(ambient_pressure_mbar < ceiling_mbar) | |
| 324 ambient_pressure_mbar = ceiling_mbar; | |
| 325 | |
| 326 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
| 327 ambient_pressure_mbar_memory = ambient_pressure_mbar; | |
| 328 time_last_call = divetime_in_seconds; | |
| 329 return 0; | |
| 330 } | |
| 331 } | |
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332 #endif |
| 38 | 333 |
| 334 uint8_t is_init_pressure_done(void) | |
| 335 { | |
| 336 return pressureSensorInitSuccess; | |
| 337 } | |
| 338 | |
| 339 uint8_t init_pressure(void) | |
| 340 { | |
| 341 uint8_t buffer[1]; | |
| 356 | 342 buffer[0] = 0x1E; // Reset Command |
| 38 | 343 uint8_t retValue = 0xFF; |
| 344 | |
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345 pressureSensorInitSuccess = false; |
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346 init_pressure_history(); |
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347 |
| 356 | 348 /* Probe new sensor first */ |
| 349 retValue = I2C_Master_Transmit( DEVICE_PRESSURE_MS5837, buffer, 1); | |
| 350 if(retValue != HAL_OK) | |
| 351 { | |
| 352 PRESSURE_ADDRESS = DEVICE_PRESSURE_MS5803; // use old sensor | |
| 353 HAL_Delay(100); | |
| 354 MX_I2C1_Init(); | |
| 355 if (global.I2C_SystemStatus != HAL_OK) | |
| 356 { | |
| 357 if (MX_I2C1_TestAndClear() == GPIO_PIN_RESET) { | |
| 358 MX_I2C1_TestAndClear(); // do it a second time | |
| 359 } | |
| 360 MX_I2C1_Init(); | |
| 361 } | |
| 362 } | |
| 363 else | |
| 364 { | |
| 365 PRESSURE_ADDRESS = DEVICE_PRESSURE_MS5837; // Success, use new sensor | |
| 366 } | |
| 367 HAL_Delay(3); //2.8ms according to datasheet | |
| 368 | |
| 369 buffer[0] = 0x1E; // Reset Command | |
| 370 retValue = 0xFF; | |
| 371 | |
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372 /* Send reset request to pressure sensor */ |
| 356 | 373 retValue = I2C_Master_Transmit( PRESSURE_ADDRESS, buffer, 1); |
| 38 | 374 if(retValue != HAL_OK) |
| 375 { | |
| 376 return (HAL_StatusTypeDef)retValue; | |
| 377 } | |
| 356 | 378 HAL_Delay(3); //2.8ms according to datasheet |
| 38 | 379 |
| 356 | 380 for(uint8_t i=0;i<7;i++) |
| 38 | 381 { |
| 382 C[i] = get_ci_by_coef_num(i); | |
| 383 } | |
| 356 | 384 // n_crc = crc4(C); // no evaluation at the moment hw 151026 |
| 38 | 385 |
| 386 C5_x_2p8 = C[5] * 256; | |
| 387 C2_x_2p16 = C[2] * 65536; | |
| 388 C1_x_2p15 = C[1] * 32768; | |
| 389 | |
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390 if(global.I2C_SystemStatus == HAL_OK) |
| 38 | 391 { |
| 392 pressureSensorInitSuccess = 1; | |
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393 retValue = pressure_update(); |
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394 |
| 38 | 395 } |
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396 return retValue; |
| 38 | 397 } |
| 398 | |
| 399 | |
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400 static uint32_t get_adc(void) |
| 38 | 401 { |
| 402 uint8_t buffer[1]; | |
| 403 uint8_t resivebuf[4]; | |
| 404 uint32_t answer = 0; | |
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405 |
| 38 | 406 buffer[0] = 0x00; // Get ADC |
| 356 | 407 I2C_Master_Transmit( PRESSURE_ADDRESS, buffer, 1); |
| 408 I2C_Master_Receive( PRESSURE_ADDRESS, resivebuf, 4); | |
| 38 | 409 resivebuf[3] = 0; |
| 410 answer = 256*256 *(uint32_t)resivebuf[0] + 256 * (uint32_t)resivebuf[1] + (uint32_t)resivebuf[2]; | |
| 411 | |
| 412 return answer; | |
| 413 } | |
| 414 | |
| 415 | |
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416 static uint16_t get_ci_by_coef_num(uint8_t coef_num) |
| 38 | 417 { |
| 418 uint8_t resivebuf[2]; | |
| 419 | |
| 420 uint8_t cmd = CMD_PROM_RD+coef_num*2; | |
| 356 | 421 I2C_Master_Transmit( PRESSURE_ADDRESS, &cmd, 1); |
| 422 I2C_Master_Receive( PRESSURE_ADDRESS, resivebuf, 2); | |
| 38 | 423 return (256*(uint16_t)resivebuf[0]) + (uint16_t)resivebuf[1]; |
| 424 } | |
| 425 | |
| 426 | |
| 427 | |
| 428 uint8_t pressure_update(void) | |
| 429 { | |
| 430 HAL_StatusTypeDef statusReturn = HAL_TIMEOUT; | |
| 431 | |
| 432 statusReturn = pressure_sensor_get_data(); | |
| 433 pressure_calculation(); | |
| 434 return (uint8_t)statusReturn; | |
| 435 } | |
| 436 | |
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437 /* Switch between pressure and temperature measurement with every successful read operation */ |
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438 void pressure_update_alternating(void) |
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439 { |
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440 static uint8_t getTemperature= 0; |
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441 |
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442 if(getTemperature) |
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443 { |
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444 if(pressure_sensor_get_temperature_raw() == HAL_OK) |
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445 { |
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446 getTemperature = 0; |
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447 } |
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448 } |
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449 else |
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450 { |
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451 if(pressure_sensor_get_pressure_raw() == HAL_OK) |
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452 { |
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453 getTemperature = 1; |
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454 } |
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455 } |
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456 pressure_calculation(); |
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457 return; |
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458 } |
| 38 | 459 |
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460 static uint32_t pressure_sensor_get_one_value(uint8_t cmd, HAL_StatusTypeDef *statusReturn) |
| 38 | 461 { |
| 462 uint8_t command = CMD_ADC_CONV + cmd; | |
| 463 HAL_StatusTypeDef statusReturnTemp = HAL_TIMEOUT; | |
| 464 | |
| 356 | 465 statusReturnTemp = I2C_Master_Transmit( PRESSURE_ADDRESS, &command, 1); |
| 38 | 466 |
| 467 if(statusReturn) | |
| 468 { | |
| 469 *statusReturn = statusReturnTemp; | |
| 470 } | |
| 471 | |
| 472 switch (cmd & 0x0f) // wait necessary conversion time | |
| 473 { | |
| 474 case CMD_ADC_256 : HAL_Delay(1); break; | |
| 475 case CMD_ADC_512 : HAL_Delay(3); break; | |
| 476 case CMD_ADC_1024: HAL_Delay(4); break; | |
| 477 case CMD_ADC_2048: HAL_Delay(6); break; | |
| 478 case CMD_ADC_4096: HAL_Delay(10); break; | |
| 479 } | |
| 480 return get_adc(); | |
| 481 } | |
| 482 | |
| 483 | |
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484 static HAL_StatusTypeDef pressure_sensor_get_data(void) |
| 38 | 485 { |
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486 uint32_t requestedValue = 0; |
| 38 | 487 HAL_StatusTypeDef statusReturn1 = HAL_TIMEOUT; |
| 488 HAL_StatusTypeDef statusReturn2 = HAL_TIMEOUT; | |
| 489 | |
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490 |
| 38 | 491 |
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492 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D2 + CMD_ADC_1024, &statusReturn2); |
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493 if (statusReturn2 == HAL_OK) |
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494 { |
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495 D2 = requestedValue; |
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496 } |
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497 |
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498 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D1 + CMD_ADC_1024, &statusReturn1); |
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499 if (statusReturn1 == HAL_OK) |
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500 { |
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501 D1 = requestedValue; |
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502 } |
| 38 | 503 if(statusReturn2 > statusReturn1) // if anything is not HAL_OK (0x00) or worse |
| 504 return statusReturn2; | |
| 505 else | |
| 506 return statusReturn1; | |
| 507 } | |
| 508 | |
| 509 | |
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510 HAL_StatusTypeDef pressure_sensor_get_pressure_raw(void) |
| 38 | 511 { |
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512 uint32_t requestedValue = 0; |
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513 HAL_StatusTypeDef statusReturn = HAL_TIMEOUT; |
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514 |
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515 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D1 + CMD_ADC_1024, &statusReturn); |
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516 if (statusReturn == HAL_OK) |
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517 { |
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518 D1 = requestedValue; |
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519 } |
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520 |
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521 return statusReturn; |
| 38 | 522 } |
| 523 | |
| 524 | |
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525 HAL_StatusTypeDef pressure_sensor_get_temperature_raw(void) |
| 38 | 526 { |
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527 uint32_t requestedValue = 0; |
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528 HAL_StatusTypeDef statusReturn = HAL_TIMEOUT; |
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529 |
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530 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D2 + CMD_ADC_1024, &statusReturn); |
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531 if (statusReturn == HAL_OK) |
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532 { |
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533 D2 = requestedValue; |
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534 } |
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535 return statusReturn; |
| 38 | 536 } |
| 537 | |
| 538 | |
| 352 | 539 #ifdef SIMULATE_PRESSURE |
| 540 void pressure_simulation() | |
| 541 { | |
| 542 static uint32_t tickstart = 0; | |
| 543 static float pressure_sim_mbar = 0; | |
| 544 static uint32_t passedSecond = 0; | |
| 545 static uint32_t secondtick = 0; | |
| 546 | |
| 547 uint32_t lasttick = 0; | |
| 548 | |
| 549 | |
| 550 | |
| 551 if( tickstart == 0) | |
| 552 { | |
| 553 tickstart = HAL_GetTick(); /* init time stamp */ | |
| 554 secondtick = tickstart; | |
| 555 pressure_sim_mbar = 1000; | |
| 556 } | |
| 557 | |
| 558 lasttick = HAL_GetTick(); | |
| 559 if(time_elapsed_ms(secondtick,lasttick) > 1000) /* one second passed since last tick */ | |
| 560 { | |
| 561 secondtick = lasttick; | |
| 562 passedSecond++; | |
| 563 | |
| 564 #ifdef DIVE_AFTER_LANDING | |
| 565 if(passedSecond < 10) pressure_sim_mbar = 1000.0; /* stay stable for 10 seconds */ | |
| 566 else if(passedSecond < 300) pressure_sim_mbar -= 1.0; /* decrease pressure in 5 minutes target 770mbar => delta 330 */ | |
| 567 else if(passedSecond < 900) pressure_sim_mbar += 0.0; /*stay stable 10 minutes*/ | |
| 568 else if(passedSecond < 1500) pressure_sim_mbar += 0.5; /* return to 1 bar in 10 Minutes*/ | |
| 569 else if(passedSecond < 1800) pressure_sim_mbar += 0.0; /* 5 minutes break */ | |
| 570 else if(passedSecond < 2000) pressure_sim_mbar += 10.0; /* start dive */ | |
| 571 else if(passedSecond < 2300) pressure_sim_mbar += 0.0; /* stay on depth */ | |
| 572 else if(passedSecond < 2500) pressure_sim_mbar -= 10.0; /* return to surface */ | |
| 573 else pressure_sim_mbar = 1000.0; /* final state */ | |
| 574 #else /* short dive */ | |
| 575 if(passedSecond < 10) pressure_sim_mbar = 1000.0; /* stay stable for 10 seconds */ | |
| 576 else if(passedSecond < 180) pressure_sim_mbar += 10.0; /* Start dive */ | |
| 577 else if(passedSecond < 300) pressure_sim_mbar += 0.0; /*stay on depth*/ | |
| 578 else if(passedSecond < 460) pressure_sim_mbar -= 10.0; /* return to surface */ | |
| 579 else if(passedSecond < 600) pressure_sim_mbar += 0.0; /* stay */ | |
| 580 else if(passedSecond < 610) pressure_sim_mbar = 1000.0; /* get ready for second dive */ | |
| 581 else if(passedSecond < 780) pressure_sim_mbar += 10.0; /* Start dive */ | |
| 582 else if(passedSecond < 900) pressure_sim_mbar += 0.0; /*stay on depth*/ | |
| 583 else if(passedSecond < 1060) pressure_sim_mbar -= 10.0; /* return to surface */ | |
| 584 else if(passedSecond < 1200) pressure_sim_mbar += 0.0; /* stay */ | |
| 585 else pressure_sim_mbar = 1000.0; /* final state */ | |
| 586 #endif | |
| 587 } | |
| 588 | |
| 589 | |
| 590 ambient_pressure_mbar = pressure_sim_mbar; | |
| 591 ambient_temperature = 25.0; | |
| 592 return; | |
| 593 } | |
| 594 | |
| 595 #endif | |
| 596 | |
| 38 | 597 void pressure_calculation(void) |
| 598 { | |
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599 if(global.I2C_SystemStatus != HAL_OK) |
| 38 | 600 return; |
| 352 | 601 |
| 602 #ifdef SIMULATE_PRESSURE | |
| 603 pressure_simulation(); | |
| 604 #else | |
| 38 | 605 pressure_calculation_AN520_004_mod_MS5803_30BA__09_2015(); |
| 352 | 606 #endif |
| 38 | 607 } |
| 608 | |
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609 static uint8_t pressure_plausible(float pressurevalue) |
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610 { |
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611 static uint8_t pressurewriteindex = 0; |
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612 uint8_t retval = 0; |
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613 uint8_t index; |
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614 float pressure_average = 0; |
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615 |
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616 for(index = 0; index < PRESSURE_HISTORY_SIZE; index++) |
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617 { |
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618 pressure_average += pressure_history_mbar[index]; |
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619 } |
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620 pressure_average /= PRESSURE_HISTORY_SIZE; |
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621 if(pressure_average == 1000.0) /* first pressure calculation */ |
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622 { |
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623 if(fabs(pressurevalue - pressure_average) < 11000.0) /* just in case a reset occur during dive assume value equal < 100m as valid */ |
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624 { |
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625 for(index = 0; index < PRESSURE_HISTORY_SIZE; index++) |
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626 { |
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627 pressure_history_mbar[index] = pressurevalue; /* set history to current value */ |
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628 retval = 1; |
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629 } |
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630 } |
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631 } |
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632 else |
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633 { |
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634 pressure_history_mbar[pressurewriteindex++] = pressurevalue; |
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635 pressurewriteindex &= 0x7; /* wrap around if necessary */ |
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636 retval = 1; |
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637 } |
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638 |
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639 return retval; |
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640 } |
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641 |
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642 static void pressure_calculation_AN520_004_mod_MS5803_30BA__09_2015(void) |
| 38 | 643 { |
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644 static float runningAvg = 0; |
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645 static uint8_t avgCnt = 0; |
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646 |
| 38 | 647 uint32_t local_D1; // ADC value of the pressure conversion |
| 648 uint32_t local_D2; // ADC value of the temperature conversion | |
| 649 int32_t local_Px10; // compensated pressure value | |
| 650 int32_t local_Tx100; // compensated temperature value | |
| 651 int64_t local_dT; // int32_t, difference between actual and measured temperature | |
| 652 int64_t local_OFF; // offset at actual temperature | |
| 653 int64_t local_SENS; // sensitivity at actual temperature | |
| 654 | |
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655 float calc_pressure; |
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656 |
| 38 | 657 int64_t T2; |
| 658 int64_t OFF2; | |
| 659 int64_t SENS2; | |
| 660 | |
| 661 local_D1 = D1; | |
| 662 local_D2 = D2; | |
| 663 | |
| 664 local_dT = ((int64_t)local_D2) - ((int64_t)C[5]) * 256; //pow(2,8); | |
| 665 local_OFF = ((int64_t)C[2]) * 65536 + local_dT * ((int64_t)C[4]) / 128; // pow(2,16), pow(2,7) | |
| 666 local_SENS = ((int64_t)C[1]) * 32768 + local_dT * ((int64_t)C[3]) / 256; // pow(2,15), pow(2,8) | |
| 667 | |
| 668 local_Tx100 = (int32_t)(2000 + (local_dT * ((int64_t)C[6])) / 8388608);// pow(2,23) | |
| 669 | |
| 670 | |
| 671 if(local_Tx100 < 2000) // low temperature | |
| 672 { | |
| 673 T2 = 3 * local_dT; | |
| 674 T2 *= local_dT; | |
| 675 T2 /= 8589934592; | |
| 676 | |
| 677 OFF2 = ((int64_t)local_Tx100) - 2000; | |
| 678 OFF2 *= OFF2; | |
| 679 OFF2 *= 3; | |
| 680 OFF2 /= 2; | |
| 681 | |
| 682 SENS2 = ((int64_t)local_Tx100) - 2000; | |
| 683 SENS2 *= SENS2; | |
| 684 SENS2 *= 5; | |
| 685 SENS2 /= 8; | |
| 686 | |
| 687 local_Tx100 -= (int32_t)T2; | |
| 688 local_OFF -= OFF2; | |
| 689 local_SENS -= SENS2; | |
| 690 } | |
| 691 else | |
| 692 { | |
| 693 T2 = 7 * local_dT; | |
| 694 T2 *= local_dT; | |
| 695 T2 /= 137438953472; | |
| 696 | |
| 697 OFF2 = ((int64_t)local_Tx100) - 2000; | |
| 698 OFF2 *= OFF2; | |
| 699 OFF2 /= 16; | |
| 700 | |
| 701 local_Tx100 -= (int32_t)T2; | |
| 702 local_OFF -= OFF2; | |
| 703 } | |
| 704 | |
| 705 local_Px10 = (int32_t)( | |
| 706 (((int64_t)((local_D1 * local_SENS) / 2097152)) - local_OFF) | |
| 707 / 8192 );// )) / 10; // pow(2,21), pow(2,13) | |
| 708 | |
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709 ambient_temperature = ((float)local_Tx100) / 100; |
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710 ambient_temperature += temperature_offset; |
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711 |
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712 calc_pressure = ((float)local_Px10) / 10; |
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713 calc_pressure += pressure_offset; |
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714 |
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715 if(pressure_plausible(calc_pressure)) |
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716 { |
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717 runningAvg = (avgCnt * runningAvg + calc_pressure) / (avgCnt + 1); |
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718 if (avgCnt < 10) /* build an average considering the last measurements to have a weight "1 of 10" */ |
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719 { /* Main reason for this is the jitter of up to +-10 HPa in surface mode which is caused */ |
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720 avgCnt++; /* by the measurement range of the sensor which is focused on under water pressure measurement */ |
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721 } |
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722 ambient_pressure_mbar = runningAvg; |
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723 } |
| 38 | 724 } |
| 725 | |
| 726 | |
| 727 /* taken from AN520 by meas-spec.com dated 9. Aug. 2011 | |
| 728 * short and int are both 16bit according to AVR/GCC google results | |
| 729 */ | |
| 356 | 730 /*static uint8_t crc4(uint16_t n_prom[]) |
| 38 | 731 { |
| 732 uint16_t cnt; // simple counter | |
| 733 uint16_t n_rem; // crc reminder | |
| 734 uint16_t crc_read; // original value of the crc | |
| 735 uint8_t n_bit; | |
| 736 n_rem = 0x00; | |
| 737 crc_read=n_prom[7]; //save read CRC | |
| 738 n_prom[7]=(0xFF00 & (n_prom[7])); //CRC byte is replaced by 0 | |
| 739 for (cnt = 0; cnt < 16; cnt++) // operation is performed on bytes | |
| 740 { // choose LSB or MSB | |
| 741 if (cnt%2==1) n_rem ^= (uint16_t) ((n_prom[cnt>>1]) & 0x00FF); | |
| 742 else n_rem ^= (uint16_t) (n_prom[cnt>>1]>>8); | |
| 743 for (n_bit = 8; n_bit > 0; n_bit--) | |
| 744 { | |
| 745 if (n_rem & (0x8000)) | |
| 746 { | |
| 747 n_rem = (n_rem << 1) ^ 0x3000; | |
| 748 } | |
| 749 else | |
| 750 { | |
| 751 n_rem = (n_rem << 1); | |
| 752 } | |
| 753 } | |
| 754 } | |
| 755 n_rem= (0x000F & (n_rem >> 12)); // // final 4-bit reminder is CRC code | |
| 756 n_prom[7]=crc_read; // restore the crc_read to its original place | |
| 757 return (n_rem ^ 0x00); | |
| 758 } | |
| 356 | 759 |
| 38 | 760 void test_calculation(void) |
| 761 { | |
| 762 C1 = 29112; | |
| 763 C2 = 26814; | |
| 764 C3 = 19125; | |
| 765 C4 = 17865; | |
| 766 C5 = 32057; | |
| 767 C6 = 31305; | |
| 768 | |
| 769 C2_x_2p16 = C2 * 65536; | |
| 770 C1_x_2p15 = C1 * 32768; | |
| 771 | |
| 772 D1 = 4944364; | |
| 773 D2 = 8198974; | |
| 774 pressure_calculation() ; | |
| 775 }; | |
| 776 */ | |
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777 void pressure_set_offset (float pressureOffset, float temperatureOffset) |
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778 { |
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779 if(pressure_offset != pressureOffset) /* we received a new value => reinit surface que */ |
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780 { |
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781 ambient_pressure_mbar -= pressure_offset; /* revert old value */ |
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782 ambient_pressure_mbar += pressureOffset; /* apply new offset */ |
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783 init_surface_ring(1); |
|
37f45300bc2e
Apply averaging to pressure measurement: In pre versions calculated pressure value jittered +/-10hPa. Since we measure the pressure several time a second but only use one value a second, calc average including not used values
ideenmodellierer
parents:
335
diff
changeset
|
784 } |
| 38 | 785 |
|
339
37f45300bc2e
Apply averaging to pressure measurement: In pre versions calculated pressure value jittered +/-10hPa. Since we measure the pressure several time a second but only use one value a second, calc average including not used values
ideenmodellierer
parents:
335
diff
changeset
|
786 pressure_offset = pressureOffset; |
|
37f45300bc2e
Apply averaging to pressure measurement: In pre versions calculated pressure value jittered +/-10hPa. Since we measure the pressure several time a second but only use one value a second, calc average including not used values
ideenmodellierer
parents:
335
diff
changeset
|
787 temperature_offset = temperatureOffset; |
|
37f45300bc2e
Apply averaging to pressure measurement: In pre versions calculated pressure value jittered +/-10hPa. Since we measure the pressure several time a second but only use one value a second, calc average including not used values
ideenmodellierer
parents:
335
diff
changeset
|
788 } |
|
37f45300bc2e
Apply averaging to pressure measurement: In pre versions calculated pressure value jittered +/-10hPa. Since we measure the pressure several time a second but only use one value a second, calc average including not used values
ideenmodellierer
parents:
335
diff
changeset
|
789 |
|
37f45300bc2e
Apply averaging to pressure measurement: In pre versions calculated pressure value jittered +/-10hPa. Since we measure the pressure several time a second but only use one value a second, calc average including not used values
ideenmodellierer
parents:
335
diff
changeset
|
790 |