mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-12-18 16:53:45 +00:00
352 lines
No EOL
14 KiB
C
352 lines
No EOL
14 KiB
C
/*
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Unitemp - Universal temperature reader
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Copyright (C) 2022 Victor Nikitchuk (https://github.com/quen0n)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "BMx280.h"
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const SensorType BMP280 = {
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.typename = "BMP280",
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.interface = &I2C,
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.datatype = UT_TEMPERATURE | UT_PRESSURE,
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.pollingInterval = 500,
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.allocator = unitemp_BMx280_alloc,
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.mem_releaser = unitemp_BMx280_free,
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.initializer = unitemp_BMx280_init,
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.deinitializer = unitemp_BMx280_deinit,
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.updater = unitemp_BMx280_update};
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const SensorType BME280 = {
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.typename = "BME280",
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.interface = &I2C,
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.datatype = UT_TEMPERATURE | UT_HUMIDITY | UT_PRESSURE,
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.pollingInterval = 500,
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.allocator = unitemp_BMx280_alloc,
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.mem_releaser = unitemp_BMx280_free,
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.initializer = unitemp_BMx280_init,
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.deinitializer = unitemp_BMx280_deinit,
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.updater = unitemp_BMx280_update};
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//Интервал обновления калибровочных значений
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#define BOSCH_CAL_UPDATE_INTERVAL 60000
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#define TEMP_CAL_START_ADDR 0x88
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#define PRESS_CAL_START_ADDR 0x8E
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#define HUM_CAL_H1_ADDR 0xA1
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#define HUM_CAL_H2_ADDR 0xE1
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#define BMP280_ID 0x58
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#define BME280_ID 0x60
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#define BMx280_I2C_ADDR_MIN (0x76 << 1)
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#define BMx280_I2C_ADDR_MAX (0x77 << 1)
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#define BMx280_REG_STATUS 0xF3
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#define BMx280_REG_CTRL_MEAS 0xF4
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#define BMx280_REG_CONFIG 0xF5
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#define BME280_REG_CTRL_HUM 0xF2
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//Преддескретизация температуры
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#define BMx280_TEMP_OVERSAMPLING_SKIP 0b00000000
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#define BMx280_TEMP_OVERSAMPLING_1 0b00100000
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#define BMx280_TEMP_OVERSAMPLING_2 0b01000000
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#define BMx280_TEMP_OVERSAMPLING_4 0b01100000
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#define BMx280_TEMP_OVERSAMPLING_8 0b10000000
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#define BMx280_TEMP_OVERSAMPLING_16 0b10100000
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//Преддескретизация давления
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#define BMx280_PRESS_OVERSAMPLING_SKIP 0b00000000
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#define BMx280_PRESS_OVERSAMPLING_1 0b00000100
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#define BMx280_PRESS_OVERSAMPLING_2 0b00001000
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#define BMx280_PRESS_OVERSAMPLING_4 0b00001100
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#define BMx280_PRESS_OVERSAMPLING_8 0b00010000
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#define BMx280_PRESS_OVERSAMPLING_16 0b00010100
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//Преддескретизация влажности
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#define BME280_HUM_OVERSAMPLING_SKIP 0b00000000
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#define BME280_HUM_OVERSAMPLING_1 0b00000001
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#define BME280_HUM_OVERSAMPLING_2 0b00000010
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#define BME280_HUM_OVERSAMPLING_4 0b00000011
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#define BME280_HUM_OVERSAMPLING_8 0b00000100
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#define BME280_HUM_OVERSAMPLING_16 0b00000101u
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//Режимы работы датчика
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#define BMx280_MODE_SLEEP 0b00000000 //Наелся и спит
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#define BMx280_MODE_FORCED 0b00000001 //Обновляет значения 1 раз, после чего уходит в сон
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#define BMx280_MODE_NORMAL 0b00000011 //Регулярно обновляет значения
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//Период обновления в нормальном режиме
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#define BMx280_STANDBY_TIME_0_5 0b00000000
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#define BMx280_STANDBY_TIME_62_5 0b00100000
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#define BMx280_STANDBY_TIME_125 0b01000000
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#define BMx280_STANDBY_TIME_250 0b01100000
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#define BMx280_STANDBY_TIME_500 0b10000000
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#define BMx280_STANDBY_TIME_1000 0b10100000
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#define BMx280_STANDBY_TIME_2000 0b11000000
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#define BMx280_STANDBY_TIME_4000 0b11100000
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//Коэффициент фильтрации значений
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#define BMx280_FILTER_COEFF_1 0b00000000
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#define BMx280_FILTER_COEFF_2 0b00000100
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#define BMx280_FILTER_COEFF_4 0b00001000
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#define BMx280_FILTER_COEFF_8 0b00001100
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#define BMx280_FILTER_COEFF_16 0b00010000
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//Разрешить работу по SPI
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#define BMx280_SPI_3W_ENABLE 0b00000001
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#define BMx280_SPI_3W_DISABLE 0b00000000
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static float BMx280_compensate_temperature(I2CSensor* i2c_sensor, int32_t adc_T) {
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BMx280_instance* bmx280_instance = (BMx280_instance*)i2c_sensor->sensorInstance;
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int32_t var1, var2;
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var1 = ((((adc_T >> 3) - ((int32_t)bmx280_instance->temp_cal.dig_T1 << 1))) *
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((int32_t)bmx280_instance->temp_cal.dig_T2)) >>
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11;
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var2 = (((((adc_T >> 4) - ((int32_t)bmx280_instance->temp_cal.dig_T1)) *
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((adc_T >> 4) - ((int32_t)bmx280_instance->temp_cal.dig_T1))) >>
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12) *
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((int32_t)bmx280_instance->temp_cal.dig_T3)) >>
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14;
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bmx280_instance->t_fine = var1 + var2;
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return ((bmx280_instance->t_fine * 5 + 128) >> 8) / 100.0f;
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}
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static float BMx280_compensate_pressure(I2CSensor* i2c_sensor, int32_t adc_P) {
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BMx280_instance* bmx280_instance = (BMx280_instance*)i2c_sensor->sensorInstance;
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int32_t var1, var2;
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uint32_t p;
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var1 = (((int32_t)bmx280_instance->t_fine) >> 1) - (int32_t)64000;
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var2 = (((var1 >> 2) * (var1 >> 2)) >> 11) * ((int32_t)bmx280_instance->press_cal.dig_P6);
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var2 = var2 + ((var1 * ((int32_t)bmx280_instance->press_cal.dig_P5)) << 1);
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var2 = (var2 >> 2) + (((int32_t)bmx280_instance->press_cal.dig_P4) << 16);
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var1 = (((bmx280_instance->press_cal.dig_P3 * (((var1 >> 2) * (var1 >> 2)) >> 13)) >> 3) +
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((((int32_t)bmx280_instance->press_cal.dig_P2) * var1) >> 1)) >>
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18;
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var1 = ((((32768 + var1)) * ((int32_t)bmx280_instance->press_cal.dig_P1)) >> 15);
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if(var1 == 0) {
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return 0; // avoid exception caused by division by zero
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}
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p = (((uint32_t)(((int32_t)1048576) - adc_P) - (var2 >> 12))) * 3125;
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if(p < 0x80000000) {
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p = (p << 1) / ((uint32_t)var1);
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} else {
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p = (p / (uint32_t)var1) * 2;
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}
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var1 = (((int32_t)bmx280_instance->press_cal.dig_P9) *
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((int32_t)(((p >> 3) * (p >> 3)) >> 13))) >>
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12;
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var2 = (((int32_t)(p >> 2)) * ((int32_t)bmx280_instance->press_cal.dig_P8)) >> 13;
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p = (uint32_t)((int32_t)p + ((var1 + var2 + bmx280_instance->press_cal.dig_P7) >> 4));
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return p;
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}
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static float BMx280_compensate_humidity(I2CSensor* i2c_sensor, int32_t adc_H) {
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BMx280_instance* bmx280_instance = (BMx280_instance*)i2c_sensor->sensorInstance;
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int32_t v_x1_u32r;
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v_x1_u32r = (bmx280_instance->t_fine - ((int32_t)76800));
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v_x1_u32r =
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(((((adc_H << 14) - (((int32_t)bmx280_instance->hum_cal.dig_H4) << 20) -
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(((int32_t)bmx280_instance->hum_cal.dig_H5) * v_x1_u32r)) +
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((int32_t)16384)) >>
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15) *
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(((((((v_x1_u32r * ((int32_t)bmx280_instance->hum_cal.dig_H6)) >> 10) *
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(((v_x1_u32r * ((int32_t)bmx280_instance->hum_cal.dig_H3)) >> 11) +
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((int32_t)32768))) >>
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10) +
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((int32_t)2097152)) *
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((int32_t)bmx280_instance->hum_cal.dig_H2) +
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8192) >>
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14));
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v_x1_u32r =
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(v_x1_u32r - (((((v_x1_u32r >> 15) * (v_x1_u32r >> 15)) >> 7) *
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((int32_t)bmx280_instance->hum_cal.dig_H1)) >>
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4));
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v_x1_u32r = (v_x1_u32r < 0 ? 0 : v_x1_u32r);
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v_x1_u32r = (v_x1_u32r > 419430400 ? 419430400 : v_x1_u32r);
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return ((uint32_t)(v_x1_u32r >> 12)) / 1024.0f;
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}
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static bool bmx280_readCalValues(I2CSensor* i2c_sensor) {
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BMx280_instance* bmx280_instance = (BMx280_instance*)i2c_sensor->sensorInstance;
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if(!unitemp_i2c_readRegArray(
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i2c_sensor, TEMP_CAL_START_ADDR, 6, (uint8_t*)&bmx280_instance->temp_cal))
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return false;
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#ifdef UNITEMP_DEBUG
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FURI_LOG_D(
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APP_NAME,
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"Sensor BMx280 (0x%02X) T1-T3: %d, %d, %d",
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i2c_sensor->currentI2CAdr,
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bmx280_instance->temp_cal.dig_T1,
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bmx280_instance->temp_cal.dig_T2,
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bmx280_instance->temp_cal.dig_T3);
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#endif
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if(!unitemp_i2c_readRegArray(
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i2c_sensor, PRESS_CAL_START_ADDR, 18, (uint8_t*)&bmx280_instance->press_cal))
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return false;
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#ifdef UNITEMP_DEBUG
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FURI_LOG_D(
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APP_NAME,
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"Sensor BMx280 (0x%02X): P1-P9: %d, %d, %d, %d, %d, %d, %d, %d, %d",
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i2c_sensor->currentI2CAdr,
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bmx280_instance->press_cal.dig_P1,
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bmx280_instance->press_cal.dig_P2,
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bmx280_instance->press_cal.dig_P3,
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bmx280_instance->press_cal.dig_P4,
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bmx280_instance->press_cal.dig_P5,
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bmx280_instance->press_cal.dig_P6,
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bmx280_instance->press_cal.dig_P7,
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bmx280_instance->press_cal.dig_P8,
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bmx280_instance->press_cal.dig_P9);
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#endif
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if(bmx280_instance->chip_id == BME280_ID) {
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uint8_t buff[7] = {0};
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if(!unitemp_i2c_readRegArray(i2c_sensor, HUM_CAL_H1_ADDR, 1, buff)) return false;
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bmx280_instance->hum_cal.dig_H1 = buff[0];
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if(!unitemp_i2c_readRegArray(i2c_sensor, HUM_CAL_H2_ADDR, 7, buff)) return false;
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bmx280_instance->hum_cal.dig_H2 = (uint16_t)(buff[0] | ((uint16_t)buff[1] << 8));
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bmx280_instance->hum_cal.dig_H3 = buff[2];
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bmx280_instance->hum_cal.dig_H4 = ((int16_t)buff[3] << 4) | (buff[4] & 0x0F);
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bmx280_instance->hum_cal.dig_H5 = (buff[4] & 0x0F) | ((int16_t)buff[5] << 4);
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bmx280_instance->hum_cal.dig_H6 = buff[6];
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#ifdef UNITEMP_DEBUG
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FURI_LOG_D(
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APP_NAME,
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"Sensor BMx280 (0x%02X): H1-H6: %d, %d, %d, %d, %d, %d",
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i2c_sensor->currentI2CAdr,
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bmx280_instance->hum_cal.dig_H1,
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bmx280_instance->hum_cal.dig_H2,
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bmx280_instance->hum_cal.dig_H3,
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bmx280_instance->hum_cal.dig_H4,
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bmx280_instance->hum_cal.dig_H5,
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bmx280_instance->hum_cal.dig_H6);
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#endif
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}
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bmx280_instance->last_cal_update_time = furi_get_tick();
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return true;
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}
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static bool bmp280_isMeasuring(Sensor* sensor) {
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I2CSensor* i2c_sensor = (I2CSensor*)sensor->instance;
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return (bool)((unitemp_i2c_readReg(i2c_sensor, BMx280_REG_STATUS) & 0x08) >> 3);
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}
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bool unitemp_BMx280_alloc(Sensor* sensor, char* args) {
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UNUSED(args);
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I2CSensor* i2c_sensor = (I2CSensor*)sensor->instance;
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BMx280_instance* bmx280_instance = malloc(sizeof(BMx280_instance));
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if(bmx280_instance == NULL) {
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FURI_LOG_E(APP_NAME, "Failed to allocation sensor %s instance", sensor->name);
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return false;
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}
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if(sensor->type == &BMP280) bmx280_instance->chip_id = BMP280_ID;
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if(sensor->type == &BME280) bmx280_instance->chip_id = BME280_ID;
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i2c_sensor->sensorInstance = bmx280_instance;
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i2c_sensor->minI2CAdr = BMx280_I2C_ADDR_MIN;
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i2c_sensor->maxI2CAdr = BMx280_I2C_ADDR_MAX;
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return true;
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}
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bool unitemp_BMx280_init(Sensor* sensor) {
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I2CSensor* i2c_sensor = (I2CSensor*)sensor->instance;
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//Перезагрузка
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unitemp_i2c_writeReg(i2c_sensor, 0xE0, 0xB6);
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//Чтение ID датчика
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uint8_t id = unitemp_i2c_readReg(i2c_sensor, 0xD0);
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if(id != BMP280_ID && id != BME280_ID) {
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FURI_LOG_E(
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APP_NAME,
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"Sensor %s returned wrong ID 0x%02X, expected 0x%02X or 0x%02X",
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sensor->name,
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id,
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BMP280_ID,
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BME280_ID);
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return false;
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}
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//Настройка режимов работы
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if(id == BME280_ID) {
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unitemp_i2c_writeReg(i2c_sensor, BME280_REG_CTRL_HUM, BME280_HUM_OVERSAMPLING_1);
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unitemp_i2c_writeReg(
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i2c_sensor, BME280_REG_CTRL_HUM, unitemp_i2c_readReg(i2c_sensor, BME280_REG_CTRL_HUM));
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}
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unitemp_i2c_writeReg(
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i2c_sensor,
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BMx280_REG_CTRL_MEAS,
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BMx280_TEMP_OVERSAMPLING_2 | BMx280_PRESS_OVERSAMPLING_4 | BMx280_MODE_NORMAL);
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//Настройка периода опроса и фильтрации значений
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unitemp_i2c_writeReg(
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i2c_sensor,
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BMx280_REG_CONFIG,
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BMx280_STANDBY_TIME_500 | BMx280_FILTER_COEFF_16 | BMx280_SPI_3W_DISABLE);
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//Чтение калибровочных значений
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if(!bmx280_readCalValues(i2c_sensor)) {
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FURI_LOG_E(APP_NAME, "Failed to read calibration values sensor %s", sensor->name);
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return false;
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}
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return true;
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}
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bool unitemp_BMx280_deinit(Sensor* sensor) {
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I2CSensor* i2c_sensor = (I2CSensor*)sensor->instance;
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//Перевод в сон
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unitemp_i2c_writeReg(i2c_sensor, BMx280_REG_CTRL_MEAS, BMx280_MODE_SLEEP);
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return true;
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}
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UnitempStatus unitemp_BMx280_update(Sensor* sensor) {
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I2CSensor* i2c_sensor = (I2CSensor*)sensor->instance;
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BMx280_instance* instance = i2c_sensor->sensorInstance;
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uint32_t t = furi_get_tick();
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uint8_t buff[3];
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//Проверка инициализированности датчика
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unitemp_i2c_readRegArray(i2c_sensor, 0xF4, 2, buff);
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if(buff[0] == 0) {
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FURI_LOG_W(APP_NAME, "Sensor %s is not initialized!", sensor->name);
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return UT_SENSORSTATUS_ERROR;
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}
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while(bmp280_isMeasuring(sensor)) {
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if(furi_get_tick() - t > 100) {
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return UT_SENSORSTATUS_TIMEOUT;
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}
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}
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if(furi_get_tick() - instance->last_cal_update_time > BOSCH_CAL_UPDATE_INTERVAL) {
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bmx280_readCalValues(i2c_sensor);
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}
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if(!unitemp_i2c_readRegArray(i2c_sensor, 0xFA, 3, buff)) return UT_SENSORSTATUS_TIMEOUT;
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int32_t adc_T = ((int32_t)buff[0] << 12) | ((int32_t)buff[1] << 4) | ((int32_t)buff[2] >> 4);
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if(!unitemp_i2c_readRegArray(i2c_sensor, 0xF7, 3, buff)) return UT_SENSORSTATUS_TIMEOUT;
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int32_t adc_P = ((int32_t)buff[0] << 12) | ((int32_t)buff[1] << 4) | ((int32_t)buff[2] >> 4);
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if(!unitemp_i2c_readRegArray(i2c_sensor, 0xFD, 2, buff)) return UT_SENSORSTATUS_TIMEOUT;
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int32_t adc_H = ((uint16_t)buff[0] << 8) | buff[1];
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sensor->temp = BMx280_compensate_temperature(i2c_sensor, adc_T);
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sensor->pressure = BMx280_compensate_pressure(i2c_sensor, adc_P);
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sensor->hum = BMx280_compensate_humidity(i2c_sensor, adc_H);
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return UT_SENSORSTATUS_OK;
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}
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bool unitemp_BMx280_free(Sensor* sensor) {
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I2CSensor* i2c_sensor = (I2CSensor*)sensor->instance;
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free(i2c_sensor->sensorInstance);
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return true;
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} |