Mercurial > public > ostc4
annotate Small_CPU/Src/pressure.c @ 408:2fc08a0d1ec3 Improment_NVM
Bugfix invalid voltage / temperatur after coldstart:
In case of a cold start (complete power on / off) the RTE could send devie data before values like voltage or temperature have been measured for the first time. As result the device history data was set to it limits causing a minimal voltage of 2V to be displayed in history memory.
Workaround for voltage is to initialize it to 6V at startup but for temperature a default value having no impact to the history memory is not possible
| author | ideenmodellierer |
|---|---|
| date | Sun, 12 Jan 2020 19:50:14 +0100 |
| parents | cb3870f79e9d |
| children | 6f30f2011667 |
| 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) | |
| 54 #define PRESSURE_JUMP_VALID_MBAR (500.0f) /* values are measure several times a second => jumps > 5m very unlikely */ | |
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55 |
| 352 | 56 #define PRESSURE_SURFACE_QUE (30u) /* history buffer [minutes] for past pressure measurements */ |
| 57 #define PRESSURE_SURFACE_EVA_WINDOW (15u) /* Number of entries evaluated during instability test. Used to avoid detection while dive enters water */ | |
| 58 #define PRESSURE_SURFACE_STABLE_LIMIT (10u) /* Define pressure as stable if delta (mBar) is below this value */ | |
| 59 #define PRESSURE_SURFACE_DETECT_STABLE_CNT (5u) /* Event count to detect stable condition */ | |
| 60 #define PRESSURE_SURFACE_UNSTABLE_LIMIT (50u) /* Define pressure as not stable if delta (mBar) is larger than this value */ | |
| 61 #define PRESSURE_SURFACE_DETECT_UNSTABLE_CNT (3u) /* Event count to detect unstable condition */ | |
| 62 | |
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63 |
| 356 | 64 static uint8_t PRESSURE_ADDRESS = DEVICE_PRESSURE_MS5803; /* Default Address */ |
| 65 | |
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66 static uint16_t get_ci_by_coef_num(uint8_t coef_num); |
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67 //void pressure_calculation_new(void); |
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68 //void pressure_calculation_old(void); |
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69 static void pressure_calculation_AN520_004_mod_MS5803_30BA__09_2015(void); |
| 356 | 70 //static uint8_t crc4(uint16_t n_prom[]); |
| 38 | 71 |
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72 static HAL_StatusTypeDef pressure_sensor_get_data(void); |
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73 static uint32_t get_adc(void); |
| 38 | 74 uint8_t pressureSensorInitSuccess = 0; |
| 75 | |
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76 static uint16_t C[8] = { 1 }; |
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77 static uint32_t D1 = 1; |
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78 static uint32_t D2 = 1; |
| 356 | 79 //static uint8_t n_crc; |
| 38 | 80 |
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81 static int64_t C5_x_2p8 = 1; |
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82 static int64_t C2_x_2p16 = 1; |
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83 static int64_t C1_x_2p15 = 1; |
| 38 | 84 |
| 85 /* | |
| 86 short C2plus10000 = -1; | |
| 87 short C3plus200 = -1; | |
| 88 short C4minus250 = -1; | |
| 89 short UT1 = -1; | |
| 90 short C6plus100 = -1; | |
| 91 */ | |
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92 static float pressure_offset = 0.0; /* Offset value which may be specified by the user via PC Software */ |
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93 static float temperature_offset = 0.0; /* Offset value which may be specified by the user via PC Software */ |
| 38 | 94 |
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95 static float ambient_temperature = 0; |
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96 static float ambient_pressure_mbar = 1000.0; |
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97 static float surface_pressure_mbar = 1000.0; |
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98 static float surface_ring_mbar[PRESSURE_SURFACE_QUE] = { 0 }; |
| 38 | 99 |
| 352 | 100 static uint8_t surface_pressure_writeIndex = 0; |
| 101 static float surface_pressure_stable_value = 0; | |
| 102 static uint8_t surface_pressure_stable = 0; | |
| 103 | |
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104 static float pressure_history_mbar[PRESSURE_HISTORY_SIZE]; |
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105 |
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106 static uint8_t secondCounterSurfaceRing = 0; |
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107 static uint8_t avgCount = 0; |
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108 static float runningAvg = 0; |
| 38 | 109 |
| 110 float get_temperature(void) | |
| 111 { | |
| 112 return ambient_temperature; | |
| 113 } | |
| 114 | |
| 115 float get_pressure_mbar(void) | |
| 116 { | |
| 117 return ambient_pressure_mbar; | |
| 118 } | |
| 119 | |
| 120 float get_surface_mbar(void) | |
| 121 { | |
| 122 return surface_pressure_mbar; | |
| 123 } | |
| 124 | |
| 125 | |
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126 void init_surface_ring(uint8_t force) |
| 38 | 127 { |
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128 if((surface_ring_mbar[0] == 0) || (force)) /* only initialize once. Keep value in place in case of an i2c recovery */ |
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129 { |
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130 secondCounterSurfaceRing = 0; /* restart calculation */ |
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131 avgCount = 0; |
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132 runningAvg = 0; |
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133 |
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134 for(int i=0; i<PRESSURE_SURFACE_QUE; i++) |
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135 surface_ring_mbar[i] = ambient_pressure_mbar; |
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136 surface_pressure_mbar = ambient_pressure_mbar; |
| 352 | 137 surface_pressure_writeIndex = 0; /* index of the oldest value in the ring buffer */ |
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138 } |
| 38 | 139 } |
| 140 | |
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141 void init_pressure_history(void) |
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142 { |
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143 for(int i=0; i<PRESSURE_HISTORY_SIZE; i++) |
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144 { |
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145 pressure_history_mbar[i] = 1000.0; |
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146 } |
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147 } |
| 38 | 148 |
| 352 | 149 uint8_t is_surface_pressure_stable(void) |
| 150 { | |
| 151 return surface_pressure_stable; | |
| 152 } | |
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153 |
| 352 | 154 float set_last_surface_pressure_stable(void) |
| 155 { | |
| 156 surface_pressure_mbar = surface_pressure_stable_value; | |
| 157 return surface_pressure_stable_value; | |
| 158 } | |
| 159 | |
| 160 /* iterate backward through the history memory and evaluate the changes pressure changes during the last 30 minutes */ | |
| 161 void evaluate_surface_pressure() | |
| 162 { | |
| 163 uint8_t index; | |
| 164 float lastvalue; | |
| 165 uint8_t stablecnt = 0; | |
| 166 uint8_t unstablecnt = 0; | |
| 167 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 */ | |
| 168 uint8_t EvaluatedValues = 0; | |
| 169 | |
| 170 lastvalue = surface_ring_mbar[surface_pressure_writeIndex]; | |
| 171 surface_pressure_stable_value = surface_ring_mbar[surface_pressure_writeIndex]; /* default: if no stable value is found return the oldest value */ | |
| 172 index = surface_pressure_writeIndex; | |
| 173 surface_pressure_stable = 1; | |
| 174 | |
| 175 if(index == 0) | |
| 176 { | |
| 177 index = PRESSURE_SURFACE_QUE - 1; | |
| 178 } | |
| 179 else | |
| 180 { | |
| 181 index = index - 1; | |
| 182 } | |
| 183 do | |
| 184 { | |
| 185 if((EvaluatedValues < EvaluationWindow) && | |
| 186 (fabs(surface_pressure_stable_value - surface_ring_mbar[index]) > PRESSURE_SURFACE_UNSTABLE_LIMIT)) /* unusual change during last 30 minutes */ | |
| 187 { | |
| 188 unstablecnt++; | |
| 189 if(unstablecnt > PRESSURE_SURFACE_DETECT_UNSTABLE_CNT) | |
| 190 { | |
| 191 surface_pressure_stable = 0; | |
| 192 } | |
| 193 } | |
| 194 /* search for a value which does not change for several iterations */ | |
| 195 if (fabs(lastvalue - surface_ring_mbar[index]) < PRESSURE_SURFACE_STABLE_LIMIT) | |
| 196 { | |
| 197 stablecnt++; | |
| 198 } | |
| 199 else | |
| 200 { | |
| 201 stablecnt = 0; | |
| 202 } | |
| 203 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 */ | |
| 204 { | |
| 205 surface_pressure_stable_value = surface_ring_mbar[index]; | |
| 206 unstablecnt = 0; | |
| 207 } | |
| 208 | |
| 209 lastvalue = surface_ring_mbar[index]; | |
| 210 | |
| 211 if(index == 0) | |
| 212 { | |
| 213 index = PRESSURE_SURFACE_QUE - 1; | |
| 214 } | |
| 215 else | |
| 216 { | |
| 217 index = index - 1; | |
| 218 } | |
| 219 EvaluatedValues++; | |
| 220 } while (index != surface_pressure_writeIndex); | |
| 221 } | |
| 38 | 222 void update_surface_pressure(uint8_t call_rhythm_seconds) |
| 223 { | |
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224 |
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225 |
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226 if(is_init_pressure_done()) |
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227 { |
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228 runningAvg = (runningAvg * avgCount + ambient_pressure_mbar) / (avgCount +1); |
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229 avgCount++; |
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230 secondCounterSurfaceRing += call_rhythm_seconds; |
| 38 | 231 |
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232 if(secondCounterSurfaceRing >= 60) |
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233 { |
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234 if(runningAvg < PRESSURE_SURFACE_MAX_MBAR) |
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235 { |
| 352 | 236 surface_ring_mbar[surface_pressure_writeIndex] = runningAvg; |
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237 } |
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238 else |
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239 { |
| 352 | 240 surface_ring_mbar[surface_pressure_writeIndex] = PRESSURE_SURFACE_MAX_MBAR; |
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241 } |
| 352 | 242 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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243 |
| 352 | 244 if(surface_pressure_writeIndex == PRESSURE_SURFACE_QUE) |
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245 { |
| 352 | 246 surface_pressure_writeIndex = 0; |
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247 } |
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248 |
| 352 | 249 surface_pressure_mbar = surface_ring_mbar[surface_pressure_writeIndex]; /* 30 minutes old measurement */ |
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250 |
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251 secondCounterSurfaceRing = 0; |
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252 avgCount = 1; /* use the current value as starting point but restart the weight decrement of the measurements */ |
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253 } |
| 352 | 254 evaluate_surface_pressure(); |
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255 } |
| 38 | 256 } |
| 257 | |
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258 #ifdef DEMOMODE |
| 38 | 259 float demo_modify_temperature_helper(float bottom_mbar_diff_to_surface) |
| 260 { | |
| 261 const float temperature_surface = 31.0; | |
| 262 const float temperature_bottom = 14.0; | |
| 263 | |
| 264 const float temperature_difference = temperature_bottom - temperature_surface; | |
| 265 | |
| 266 // range 0.0 - 1.0 | |
| 267 float position_now = (ambient_pressure_mbar - surface_pressure_mbar) / bottom_mbar_diff_to_surface; | |
| 268 | |
| 269 if(position_now <= 0) | |
| 270 return temperature_surface; | |
| 271 | |
| 272 if(position_now >= 1) | |
| 273 return temperature_bottom; | |
| 274 | |
| 275 return temperature_surface + (temperature_difference * position_now); | |
| 276 } | |
| 277 | |
| 278 | |
| 279 uint32_t demo_modify_temperature_and_pressure(int32_t divetime_in_seconds, uint8_t subseconds, float ceiling_mbar) | |
| 280 { | |
| 281 | |
| 282 const float descent_rate = 4000/60; | |
| 283 const float ascent_rate = 1000/60; | |
| 284 const uint32_t seconds_descend = (1 * 60) + 30; | |
| 285 const uint32_t turbo_seconds_at_bottom_start = (0 * 60) + 0; | |
| 286 const uint32_t seconds_descend_and_bottomtime = seconds_descend + turbo_seconds_at_bottom_start + (2 * 60) + 0; | |
| 287 uint32_t time_elapsed_in_seconds; | |
| 288 static float ambient_pressure_mbar_memory = 0; | |
| 289 static uint32_t time_last_call = 0; | |
| 290 | |
| 291 if(divetime_in_seconds <= seconds_descend) | |
| 292 { | |
| 293 ambient_pressure_mbar = (divetime_in_seconds * descent_rate) + ((float)(subseconds) * descent_rate) + surface_pressure_mbar; | |
| 294 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
| 295 | |
| 296 time_last_call = divetime_in_seconds; | |
| 297 return 0; | |
| 298 } | |
| 299 else | |
| 300 if(divetime_in_seconds <= seconds_descend + turbo_seconds_at_bottom_start) | |
| 301 { | |
| 302 ambient_pressure_mbar = (seconds_descend * descent_rate) + surface_pressure_mbar; | |
| 303 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
| 304 ambient_pressure_mbar_memory = ambient_pressure_mbar; | |
| 305 time_last_call = divetime_in_seconds; | |
| 306 return turbo_seconds_at_bottom_start; | |
| 307 } | |
| 308 else | |
| 309 if(divetime_in_seconds <= seconds_descend_and_bottomtime) | |
| 310 { | |
| 311 ambient_pressure_mbar = (seconds_descend * descent_rate) + surface_pressure_mbar; | |
| 312 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
| 313 ambient_pressure_mbar_memory = ambient_pressure_mbar; | |
| 314 time_last_call = divetime_in_seconds; | |
| 315 return 0; | |
| 316 } | |
| 317 else | |
| 318 { | |
| 319 time_elapsed_in_seconds = divetime_in_seconds - time_last_call; | |
| 320 ambient_pressure_mbar = ambient_pressure_mbar_memory - time_elapsed_in_seconds * ascent_rate; | |
| 321 | |
| 322 if(ambient_pressure_mbar < surface_pressure_mbar) | |
| 323 ambient_pressure_mbar = surface_pressure_mbar; | |
| 324 else if(ambient_pressure_mbar < ceiling_mbar) | |
| 325 ambient_pressure_mbar = ceiling_mbar; | |
| 326 | |
| 327 ambient_temperature = demo_modify_temperature_helper(descent_rate * seconds_descend); | |
| 328 ambient_pressure_mbar_memory = ambient_pressure_mbar; | |
| 329 time_last_call = divetime_in_seconds; | |
| 330 return 0; | |
| 331 } | |
| 332 } | |
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333 #endif |
| 38 | 334 |
| 335 uint8_t is_init_pressure_done(void) | |
| 336 { | |
| 337 return pressureSensorInitSuccess; | |
| 338 } | |
| 339 | |
| 340 uint8_t init_pressure(void) | |
| 341 { | |
| 342 uint8_t buffer[1]; | |
| 356 | 343 buffer[0] = 0x1E; // Reset Command |
| 38 | 344 uint8_t retValue = 0xFF; |
| 345 | |
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346 pressureSensorInitSuccess = false; |
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347 init_pressure_history(); |
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348 |
| 356 | 349 /* Probe new sensor first */ |
| 350 retValue = I2C_Master_Transmit( DEVICE_PRESSURE_MS5837, buffer, 1); | |
| 351 if(retValue != HAL_OK) | |
| 352 { | |
| 353 PRESSURE_ADDRESS = DEVICE_PRESSURE_MS5803; // use old sensor | |
| 354 HAL_Delay(100); | |
| 355 MX_I2C1_Init(); | |
| 356 if (global.I2C_SystemStatus != HAL_OK) | |
| 357 { | |
| 358 if (MX_I2C1_TestAndClear() == GPIO_PIN_RESET) { | |
| 359 MX_I2C1_TestAndClear(); // do it a second time | |
| 360 } | |
| 361 MX_I2C1_Init(); | |
| 362 } | |
| 363 } | |
| 364 else | |
| 365 { | |
| 366 PRESSURE_ADDRESS = DEVICE_PRESSURE_MS5837; // Success, use new sensor | |
| 367 } | |
| 368 HAL_Delay(3); //2.8ms according to datasheet | |
| 369 | |
| 370 buffer[0] = 0x1E; // Reset Command | |
| 371 retValue = 0xFF; | |
| 372 | |
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373 /* Send reset request to pressure sensor */ |
| 356 | 374 retValue = I2C_Master_Transmit( PRESSURE_ADDRESS, buffer, 1); |
| 38 | 375 if(retValue != HAL_OK) |
| 376 { | |
| 377 return (HAL_StatusTypeDef)retValue; | |
| 378 } | |
| 356 | 379 HAL_Delay(3); //2.8ms according to datasheet |
| 38 | 380 |
| 356 | 381 for(uint8_t i=0;i<7;i++) |
| 38 | 382 { |
| 383 C[i] = get_ci_by_coef_num(i); | |
| 384 } | |
| 356 | 385 // n_crc = crc4(C); // no evaluation at the moment hw 151026 |
| 38 | 386 |
| 387 C5_x_2p8 = C[5] * 256; | |
| 388 C2_x_2p16 = C[2] * 65536; | |
| 389 C1_x_2p15 = C[1] * 32768; | |
| 390 | |
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391 if(global.I2C_SystemStatus == HAL_OK) |
| 38 | 392 { |
| 393 pressureSensorInitSuccess = 1; | |
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394 retValue = pressure_update(); |
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395 |
| 38 | 396 } |
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397 return retValue; |
| 38 | 398 } |
| 399 | |
| 400 | |
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401 static uint32_t get_adc(void) |
| 38 | 402 { |
| 403 uint8_t buffer[1]; | |
| 404 uint8_t resivebuf[4]; | |
| 405 uint32_t answer = 0; | |
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406 |
| 38 | 407 buffer[0] = 0x00; // Get ADC |
| 356 | 408 I2C_Master_Transmit( PRESSURE_ADDRESS, buffer, 1); |
| 409 I2C_Master_Receive( PRESSURE_ADDRESS, resivebuf, 4); | |
| 38 | 410 resivebuf[3] = 0; |
| 411 answer = 256*256 *(uint32_t)resivebuf[0] + 256 * (uint32_t)resivebuf[1] + (uint32_t)resivebuf[2]; | |
| 412 | |
| 413 return answer; | |
| 414 } | |
| 415 | |
| 416 | |
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417 static uint16_t get_ci_by_coef_num(uint8_t coef_num) |
| 38 | 418 { |
| 419 uint8_t resivebuf[2]; | |
| 420 | |
| 421 uint8_t cmd = CMD_PROM_RD+coef_num*2; | |
| 356 | 422 I2C_Master_Transmit( PRESSURE_ADDRESS, &cmd, 1); |
| 423 I2C_Master_Receive( PRESSURE_ADDRESS, resivebuf, 2); | |
| 38 | 424 return (256*(uint16_t)resivebuf[0]) + (uint16_t)resivebuf[1]; |
| 425 } | |
| 426 | |
| 427 | |
| 428 | |
| 429 uint8_t pressure_update(void) | |
| 430 { | |
| 431 HAL_StatusTypeDef statusReturn = HAL_TIMEOUT; | |
| 432 | |
| 433 statusReturn = pressure_sensor_get_data(); | |
| 434 pressure_calculation(); | |
| 435 return (uint8_t)statusReturn; | |
| 436 } | |
| 437 | |
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438 /* Switch between pressure and temperature measurement with every successful read operation */ |
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439 void pressure_update_alternating(void) |
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440 { |
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441 static uint8_t getTemperature= 0; |
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442 |
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443 if(getTemperature) |
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444 { |
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445 if(pressure_sensor_get_temperature_raw() == HAL_OK) |
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446 { |
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447 getTemperature = 0; |
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448 } |
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449 } |
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450 else |
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451 { |
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452 if(pressure_sensor_get_pressure_raw() == HAL_OK) |
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453 { |
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454 getTemperature = 1; |
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455 } |
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456 } |
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457 pressure_calculation(); |
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458 return; |
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459 } |
| 38 | 460 |
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461 static uint32_t pressure_sensor_get_one_value(uint8_t cmd, HAL_StatusTypeDef *statusReturn) |
| 38 | 462 { |
| 463 uint8_t command = CMD_ADC_CONV + cmd; | |
| 464 HAL_StatusTypeDef statusReturnTemp = HAL_TIMEOUT; | |
| 465 | |
| 356 | 466 statusReturnTemp = I2C_Master_Transmit( PRESSURE_ADDRESS, &command, 1); |
| 38 | 467 |
| 468 if(statusReturn) | |
| 469 { | |
| 470 *statusReturn = statusReturnTemp; | |
| 471 } | |
| 472 | |
| 473 switch (cmd & 0x0f) // wait necessary conversion time | |
| 474 { | |
| 475 case CMD_ADC_256 : HAL_Delay(1); break; | |
| 476 case CMD_ADC_512 : HAL_Delay(3); break; | |
| 477 case CMD_ADC_1024: HAL_Delay(4); break; | |
| 478 case CMD_ADC_2048: HAL_Delay(6); break; | |
| 479 case CMD_ADC_4096: HAL_Delay(10); break; | |
| 480 } | |
| 481 return get_adc(); | |
| 482 } | |
| 483 | |
| 484 | |
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485 static HAL_StatusTypeDef pressure_sensor_get_data(void) |
| 38 | 486 { |
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487 uint32_t requestedValue = 0; |
| 38 | 488 HAL_StatusTypeDef statusReturn1 = HAL_TIMEOUT; |
| 489 HAL_StatusTypeDef statusReturn2 = HAL_TIMEOUT; | |
| 490 | |
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491 |
| 38 | 492 |
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493 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D2 + CMD_ADC_1024, &statusReturn2); |
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494 if (statusReturn2 == HAL_OK) |
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495 { |
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496 D2 = requestedValue; |
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497 } |
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498 |
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499 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D1 + CMD_ADC_1024, &statusReturn1); |
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500 if (statusReturn1 == HAL_OK) |
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501 { |
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502 D1 = requestedValue; |
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503 } |
| 38 | 504 if(statusReturn2 > statusReturn1) // if anything is not HAL_OK (0x00) or worse |
| 505 return statusReturn2; | |
| 506 else | |
| 507 return statusReturn1; | |
| 508 } | |
| 509 | |
| 510 | |
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511 HAL_StatusTypeDef pressure_sensor_get_pressure_raw(void) |
| 38 | 512 { |
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513 uint32_t requestedValue = 0; |
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514 HAL_StatusTypeDef statusReturn = HAL_TIMEOUT; |
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515 |
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516 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D1 + CMD_ADC_1024, &statusReturn); |
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517 if (statusReturn == HAL_OK) |
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518 { |
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519 D1 = requestedValue; |
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520 } |
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521 |
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522 return statusReturn; |
| 38 | 523 } |
| 524 | |
| 525 | |
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526 HAL_StatusTypeDef pressure_sensor_get_temperature_raw(void) |
| 38 | 527 { |
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528 uint32_t requestedValue = 0; |
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529 HAL_StatusTypeDef statusReturn = HAL_TIMEOUT; |
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530 |
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531 requestedValue = pressure_sensor_get_one_value(CMD_ADC_D2 + CMD_ADC_1024, &statusReturn); |
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532 if (statusReturn == HAL_OK) |
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533 { |
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534 D2 = requestedValue; |
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535 } |
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536 return statusReturn; |
| 38 | 537 } |
| 538 | |
| 539 | |
| 352 | 540 #ifdef SIMULATE_PRESSURE |
| 541 void pressure_simulation() | |
| 542 { | |
| 543 static uint32_t tickstart = 0; | |
| 544 static float pressure_sim_mbar = 0; | |
| 545 static uint32_t passedSecond = 0; | |
| 546 static uint32_t secondtick = 0; | |
| 547 | |
| 548 uint32_t lasttick = 0; | |
| 549 | |
| 550 | |
| 551 | |
| 552 if( tickstart == 0) | |
| 553 { | |
| 554 tickstart = HAL_GetTick(); /* init time stamp */ | |
| 555 secondtick = tickstart; | |
| 556 pressure_sim_mbar = 1000; | |
| 557 } | |
| 558 | |
| 559 lasttick = HAL_GetTick(); | |
| 560 if(time_elapsed_ms(secondtick,lasttick) > 1000) /* one second passed since last tick */ | |
| 561 { | |
| 562 secondtick = lasttick; | |
| 563 passedSecond++; | |
| 564 | |
| 565 #ifdef DIVE_AFTER_LANDING | |
| 566 if(passedSecond < 10) pressure_sim_mbar = 1000.0; /* stay stable for 10 seconds */ | |
| 567 else if(passedSecond < 300) pressure_sim_mbar -= 1.0; /* decrease pressure in 5 minutes target 770mbar => delta 330 */ | |
| 568 else if(passedSecond < 900) pressure_sim_mbar += 0.0; /*stay stable 10 minutes*/ | |
| 569 else if(passedSecond < 1500) pressure_sim_mbar += 0.5; /* return to 1 bar in 10 Minutes*/ | |
| 570 else if(passedSecond < 1800) pressure_sim_mbar += 0.0; /* 5 minutes break */ | |
| 571 else if(passedSecond < 2000) pressure_sim_mbar += 10.0; /* start dive */ | |
| 572 else if(passedSecond < 2300) pressure_sim_mbar += 0.0; /* stay on depth */ | |
| 573 else if(passedSecond < 2500) pressure_sim_mbar -= 10.0; /* return to surface */ | |
| 574 else pressure_sim_mbar = 1000.0; /* final state */ | |
| 575 #else /* short dive */ | |
| 576 if(passedSecond < 10) pressure_sim_mbar = 1000.0; /* stay stable for 10 seconds */ | |
| 577 else if(passedSecond < 180) pressure_sim_mbar += 10.0; /* Start dive */ | |
| 578 else if(passedSecond < 300) pressure_sim_mbar += 0.0; /*stay on depth*/ | |
| 579 else if(passedSecond < 460) pressure_sim_mbar -= 10.0; /* return to surface */ | |
| 580 else if(passedSecond < 600) pressure_sim_mbar += 0.0; /* stay */ | |
| 581 else if(passedSecond < 610) pressure_sim_mbar = 1000.0; /* get ready for second dive */ | |
| 582 else if(passedSecond < 780) pressure_sim_mbar += 10.0; /* Start dive */ | |
| 583 else if(passedSecond < 900) pressure_sim_mbar += 0.0; /*stay on depth*/ | |
| 584 else if(passedSecond < 1060) pressure_sim_mbar -= 10.0; /* return to surface */ | |
| 585 else if(passedSecond < 1200) pressure_sim_mbar += 0.0; /* stay */ | |
| 586 else pressure_sim_mbar = 1000.0; /* final state */ | |
| 587 #endif | |
| 588 } | |
| 589 | |
| 590 | |
| 591 ambient_pressure_mbar = pressure_sim_mbar; | |
| 592 ambient_temperature = 25.0; | |
| 593 return; | |
| 594 } | |
| 595 | |
| 596 #endif | |
| 597 | |
| 38 | 598 void pressure_calculation(void) |
| 599 { | |
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600 if(global.I2C_SystemStatus != HAL_OK) |
| 38 | 601 return; |
| 352 | 602 |
| 603 #ifdef SIMULATE_PRESSURE | |
| 604 pressure_simulation(); | |
| 605 #else | |
| 38 | 606 pressure_calculation_AN520_004_mod_MS5803_30BA__09_2015(); |
| 352 | 607 #endif |
| 38 | 608 } |
| 609 | |
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610 static uint8_t pressure_plausible(float pressurevalue) |
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611 { |
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612 static uint8_t pressurewriteindex = 0; |
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613 uint8_t retval = 0; |
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614 uint8_t index; |
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615 float pressure_average = 0; |
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616 |
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617 for(index = 0; index < PRESSURE_HISTORY_SIZE; index++) |
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618 { |
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619 pressure_average += pressure_history_mbar[index]; |
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620 } |
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621 pressure_average /= PRESSURE_HISTORY_SIZE; |
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622 if(pressure_average == 1000.0) /* first pressure calculation */ |
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623 { |
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624 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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625 { |
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626 for(index = 0; index < PRESSURE_HISTORY_SIZE; index++) |
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627 { |
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628 pressure_history_mbar[index] = pressurevalue; /* set history to current value */ |
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629 retval = 1; |
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630 } |
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631 } |
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632 } |
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633 else |
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634 { |
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635 if(fabs(pressurevalue - pressure_average) < PRESSURE_JUMP_VALID_MBAR) |
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636 { |
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637 pressure_history_mbar[pressurewriteindex++] = pressurevalue; |
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638 pressurewriteindex &= 0x7; /* wrap around if necessary */ |
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639 retval = 1; |
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640 } |
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641 } |
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642 |
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643 return retval; |
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644 } |
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645 |
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646 static void pressure_calculation_AN520_004_mod_MS5803_30BA__09_2015(void) |
| 38 | 647 { |
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648 static float runningAvg = 0; |
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649 static uint8_t avgCnt = 0; |
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650 |
| 38 | 651 uint32_t local_D1; // ADC value of the pressure conversion |
| 652 uint32_t local_D2; // ADC value of the temperature conversion | |
| 653 int32_t local_Px10; // compensated pressure value | |
| 654 int32_t local_Tx100; // compensated temperature value | |
| 655 int64_t local_dT; // int32_t, difference between actual and measured temperature | |
| 656 int64_t local_OFF; // offset at actual temperature | |
| 657 int64_t local_SENS; // sensitivity at actual temperature | |
| 658 | |
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659 float calc_pressure; |
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660 |
| 38 | 661 int64_t T2; |
| 662 int64_t OFF2; | |
| 663 int64_t SENS2; | |
| 664 | |
| 665 local_D1 = D1; | |
| 666 local_D2 = D2; | |
| 667 | |
| 668 local_dT = ((int64_t)local_D2) - ((int64_t)C[5]) * 256; //pow(2,8); | |
| 669 local_OFF = ((int64_t)C[2]) * 65536 + local_dT * ((int64_t)C[4]) / 128; // pow(2,16), pow(2,7) | |
| 670 local_SENS = ((int64_t)C[1]) * 32768 + local_dT * ((int64_t)C[3]) / 256; // pow(2,15), pow(2,8) | |
| 671 | |
| 672 local_Tx100 = (int32_t)(2000 + (local_dT * ((int64_t)C[6])) / 8388608);// pow(2,23) | |
| 673 | |
| 674 | |
| 675 if(local_Tx100 < 2000) // low temperature | |
| 676 { | |
| 677 T2 = 3 * local_dT; | |
| 678 T2 *= local_dT; | |
| 679 T2 /= 8589934592; | |
| 680 | |
| 681 OFF2 = ((int64_t)local_Tx100) - 2000; | |
| 682 OFF2 *= OFF2; | |
| 683 OFF2 *= 3; | |
| 684 OFF2 /= 2; | |
| 685 | |
| 686 SENS2 = ((int64_t)local_Tx100) - 2000; | |
| 687 SENS2 *= SENS2; | |
| 688 SENS2 *= 5; | |
| 689 SENS2 /= 8; | |
| 690 | |
| 691 local_Tx100 -= (int32_t)T2; | |
| 692 local_OFF -= OFF2; | |
| 693 local_SENS -= SENS2; | |
| 694 } | |
| 695 else | |
| 696 { | |
| 697 T2 = 7 * local_dT; | |
| 698 T2 *= local_dT; | |
| 699 T2 /= 137438953472; | |
| 700 | |
| 701 OFF2 = ((int64_t)local_Tx100) - 2000; | |
| 702 OFF2 *= OFF2; | |
| 703 OFF2 /= 16; | |
| 704 | |
| 705 local_Tx100 -= (int32_t)T2; | |
| 706 local_OFF -= OFF2; | |
| 707 } | |
| 708 | |
| 709 local_Px10 = (int32_t)( | |
| 710 (((int64_t)((local_D1 * local_SENS) / 2097152)) - local_OFF) | |
| 711 / 8192 );// )) / 10; // pow(2,21), pow(2,13) | |
| 712 | |
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713 ambient_temperature = ((float)local_Tx100) / 100; |
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714 ambient_temperature += temperature_offset; |
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715 |
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716 calc_pressure = ((float)local_Px10) / 10; |
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717 calc_pressure += pressure_offset; |
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718 |
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719 if(pressure_plausible(calc_pressure)) |
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720 { |
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721 runningAvg = (avgCnt * runningAvg + calc_pressure) / (avgCnt + 1); |
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722 if (avgCnt < 10) /* build an average considering the last measurements to have a weight "1 of 10" */ |
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723 { /* Main reason for this is the jitter of up to +-10 HPa in surface mode which is caused */ |
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724 avgCnt++; /* by the measurement range of the sensor which is focused on under water pressure measurement */ |
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725 } |
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726 ambient_pressure_mbar = runningAvg; |
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727 } |
| 38 | 728 } |
| 729 | |
| 730 | |
| 731 /* taken from AN520 by meas-spec.com dated 9. Aug. 2011 | |
| 732 * short and int are both 16bit according to AVR/GCC google results | |
| 733 */ | |
| 356 | 734 /*static uint8_t crc4(uint16_t n_prom[]) |
| 38 | 735 { |
| 736 uint16_t cnt; // simple counter | |
| 737 uint16_t n_rem; // crc reminder | |
| 738 uint16_t crc_read; // original value of the crc | |
| 739 uint8_t n_bit; | |
| 740 n_rem = 0x00; | |
| 741 crc_read=n_prom[7]; //save read CRC | |
| 742 n_prom[7]=(0xFF00 & (n_prom[7])); //CRC byte is replaced by 0 | |
| 743 for (cnt = 0; cnt < 16; cnt++) // operation is performed on bytes | |
| 744 { // choose LSB or MSB | |
| 745 if (cnt%2==1) n_rem ^= (uint16_t) ((n_prom[cnt>>1]) & 0x00FF); | |
| 746 else n_rem ^= (uint16_t) (n_prom[cnt>>1]>>8); | |
| 747 for (n_bit = 8; n_bit > 0; n_bit--) | |
| 748 { | |
| 749 if (n_rem & (0x8000)) | |
| 750 { | |
| 751 n_rem = (n_rem << 1) ^ 0x3000; | |
| 752 } | |
| 753 else | |
| 754 { | |
| 755 n_rem = (n_rem << 1); | |
| 756 } | |
| 757 } | |
| 758 } | |
| 759 n_rem= (0x000F & (n_rem >> 12)); // // final 4-bit reminder is CRC code | |
| 760 n_prom[7]=crc_read; // restore the crc_read to its original place | |
| 761 return (n_rem ^ 0x00); | |
| 762 } | |
| 356 | 763 |
| 38 | 764 void test_calculation(void) |
| 765 { | |
| 766 C1 = 29112; | |
| 767 C2 = 26814; | |
| 768 C3 = 19125; | |
| 769 C4 = 17865; | |
| 770 C5 = 32057; | |
| 771 C6 = 31305; | |
| 772 | |
| 773 C2_x_2p16 = C2 * 65536; | |
| 774 C1_x_2p15 = C1 * 32768; | |
| 775 | |
| 776 D1 = 4944364; | |
| 777 D2 = 8198974; | |
| 778 pressure_calculation() ; | |
| 779 }; | |
| 780 */ | |
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781 void pressure_set_offset (float pressureOffset, float temperatureOffset) |
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782 { |
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783 if(pressure_offset != pressureOffset) /* we received a new value => reinit surface que */ |
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784 { |
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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
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785 ambient_pressure_mbar -= pressure_offset; /* revert old value */ |
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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
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786 ambient_pressure_mbar += pressureOffset; /* apply new offset */ |
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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
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787 init_surface_ring(1); |
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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
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788 } |
| 38 | 789 |
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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
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790 pressure_offset = pressureOffset; |
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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
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791 temperature_offset = temperatureOffset; |
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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
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792 } |
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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
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793 |
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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
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794 |