// // Created by MightyPork on 2017/11/17. // #include #include #include "voc_sensor.h" struct bme680_dev gas_sensor; static void user_delay_ms(uint32_t period) { /* * Return control or wait, * for a period amount of milliseconds */ HAL_Delay(period); } #if 0 static int8_t user_spi_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len) { int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */ /* * The parameter dev_id can be used as a variable to select which Chip Select pin has * to be set low to activate the relevant device on the SPI bus */ /* * Data on the bus should be like * |----------------+---------------------+-------------| * | MOSI | MISO | Chip Select | * |----------------+---------------------|-------------| * | (don't care) | (don't care) | HIGH | * | (reg_addr) | (don't care) | LOW | * | (don't care) | (reg_data[0]) | LOW | * | (....) | (....) | LOW | * | (don't care) | (reg_data[len - 1]) | LOW | * | (don't care) | (don't care) | HIGH | * |----------------+---------------------|-------------| */ return rslt; } static int8_t user_spi_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len) { int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */ /* * The parameter dev_id can be used as a variable to select which Chip Select pin has * to be set low to activate the relevant device on the SPI bus */ /* * Data on the bus should be like * |---------------------+--------------+-------------| * | MOSI | MISO | Chip Select | * |---------------------+--------------|-------------| * | (don't care) | (don't care) | HIGH | * | (reg_addr) | (don't care) | LOW | * | (reg_data[0]) | (don't care) | LOW | * | (....) | (....) | LOW | * | (reg_data[len - 1]) | (don't care) | LOW | * | (don't care) | (don't care) | HIGH | * |---------------------+--------------|-------------| */ return rslt; } #endif static int8_t user_i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len) { int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */ /* * The parameter dev_id can be used as a variable to store the I2C address of the device */ /* * Data on the bus should be like * |------------+---------------------| * | I2C action | Data | * |------------+---------------------| * | Start | - | * | Write | (reg_addr) | * | Stop | - | * | Start | - | * | Read | (reg_data[0]) | * | Read | (....) | * | Read | (reg_data[len - 1]) | * | Stop | - | * |------------+---------------------| */ HAL_I2C_Master_Transmit(&hi2c1, dev_id<<1, ®_addr, 1, 100); HAL_I2C_Master_Receive(&hi2c1, dev_id<<1, reg_data, len, 100); return rslt; } static int8_t user_i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len) { /* * The parameter dev_id can be used as a variable to store the I2C address of the device */ /* * Data on the bus should be like * |------------+---------------------| * | I2C action | Data | * |------------+---------------------| * | Start | - | * | Write | (reg_addr) | * | Write | (reg_data[0]) | * | Write | (....) | * | Write | (reg_data[len - 1]) | * | Stop | - | * |------------+---------------------| */ static uint8_t data[64]; data[0] = reg_addr; for (int i = 0; i < len; i++) { data[i+1] = reg_data[i]; } HAL_I2C_Master_Transmit(&hi2c1, dev_id<<1, &data[0], (uint16_t) (len + 1), 100); return BME680_OK; } void voc_init(void) { int8_t rslt; gas_sensor.dev_id = BME680_I2C_ADDR_PRIMARY; gas_sensor.intf = BME680_I2C_INTF; gas_sensor.read = user_i2c_read; gas_sensor.write = user_i2c_write; gas_sensor.delay_ms = user_delay_ms; PRINTF("BME680 initializing...\r\n"); rslt = bme680_init(&gas_sensor); assert_param(rslt == BME680_OK); PRINTF("BME680 configuring...\r\n"); /* Set the temperature, pressure and humidity settings */ gas_sensor.tph_sett.os_hum = BME680_OS_2X; gas_sensor.tph_sett.os_pres = BME680_OS_4X; gas_sensor.tph_sett.os_temp = BME680_OS_8X; gas_sensor.tph_sett.filter = BME680_FILTER_SIZE_3; /* Set the remaining gas sensor settings and link the heating profile */ gas_sensor.gas_sett.run_gas = BME680_ENABLE_GAS_MEAS; /* Create a ramp heat waveform in 3 steps */ gas_sensor.gas_sett.heatr_temp = 320; /* degree Celsius */ gas_sensor.gas_sett.heatr_dur = 150; /* milliseconds */ /* Select the power mode */ /* Must be set before writing the sensor configuration */ gas_sensor.power_mode = BME680_FORCED_MODE; /* Set the required sensor settings needed */ uint8_t set_required_settings = BME680_OST_SEL | BME680_OSP_SEL | BME680_OSH_SEL | BME680_FILTER_SEL | BME680_GAS_SENSOR_SEL; /* Set the desired sensor configuration */ rslt = bme680_set_sensor_settings(set_required_settings,&gas_sensor); assert_param(rslt == BME680_OK); } uint32_t voc_start_measure(void) { /* Set the power mode */ int8_t rslt; rslt = bme680_set_sensor_mode(&gas_sensor); assert_param(rslt == BME680_OK); /* Get the total measurement duration so as to sleep or wait till the * measurement is complete */ uint16_t meas_period; bme680_get_profile_dur(&meas_period, &gas_sensor); meas_period += 10; // add some extra safety margin PRINTF("Measurement will take %d ms\r\n", meas_period); return meas_period; } void voc_read(struct bme680_field_data *data) { /* Set the power mode */ int8_t rslt; rslt = bme680_get_sensor_data(data, &gas_sensor); assert_param(rslt == BME680_OK); PRINTF("T: %d/100 degC, P: %d/100 hPa, H %d/1000 %%rH ", data->temperature, data->pressure, data->humidity ); /* Avoid using measurements from an unstable heating setup */ if(data->status & BME680_GASM_VALID_MSK) PRINTF(", G: %d ohms", data->gas_resistance); PRINTF("\r\n"); }