/**\mainpage
- * Copyright (C) 2016 - 2017 Bosch Sensortec GmbH
+ * Copyright (C) 2018 - 2019 Bosch Sensortec GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* No license is granted by implication or otherwise under any patent or
* patent rights of the copyright holder.
*
- * File bme280.c
- * Date 14 Feb 2018
- * Version 3.3.4
+ * File bme280.c
+ * Date 08 Mar 2019
+ * Version 3.3.6
*
*/
/*! @file bme280.c
- @brief Sensor driver for BME280 sensor */
+ * @brief Sensor driver for BME280 sensor
+ */
#include "bme280.h"
/**\name Internal macros */
/* To identify osr settings selected by user */
-#define OVERSAMPLING_SETTINGS UINT8_C(0x07)
+#define OVERSAMPLING_SETTINGS UINT8_C(0x07)
+
/* To identify filter and standby settings selected by user */
-#define FILTER_STANDBY_SETTINGS UINT8_C(0x18)
+#define FILTER_STANDBY_SETTINGS UINT8_C(0x18)
/*!
* @brief This internal API puts the device to sleep mode.
static void parse_humidity_calib_data(const uint8_t *reg_data, struct bme280_dev *dev);
#ifdef BME280_FLOAT_ENABLE
+
/*!
* @brief This internal API is used to compensate the raw pressure data and
* return the compensated pressure data in double data type.
* @retval Compensated pressure data in double.
*/
static double compensate_pressure(const struct bme280_uncomp_data *uncomp_data,
- const struct bme280_calib_data *calib_data);
+ const struct bme280_calib_data *calib_data);
/*!
* @brief This internal API is used to compensate the raw humidity data and
* @retval Compensated humidity data in double.
*/
static double compensate_humidity(const struct bme280_uncomp_data *uncomp_data,
- const struct bme280_calib_data *calib_data);
+ const struct bme280_calib_data *calib_data);
/*!
* @brief This internal API is used to compensate the raw temperature data and
* @return Compensated temperature data.
* @retval Compensated temperature data in double.
*/
-static double compensate_temperature(const struct bme280_uncomp_data *uncomp_data,
- struct bme280_calib_data *calib_data);
+static double compensate_temperature(const struct bme280_uncomp_data *uncomp_data,
+ struct bme280_calib_data *calib_data);
#else
* @retval Compensated temperature data in integer.
*/
static int32_t compensate_temperature(const struct bme280_uncomp_data *uncomp_data,
- struct bme280_calib_data *calib_data);
+ struct bme280_calib_data *calib_data);
/*!
* @brief This internal API is used to compensate the raw pressure data and
* @retval Compensated pressure data in integer.
*/
static uint32_t compensate_pressure(const struct bme280_uncomp_data *uncomp_data,
- const struct bme280_calib_data *calib_data);
+ const struct bme280_calib_data *calib_data);
/*!
* @brief This internal API is used to compensate the raw humidity data and
* @retval Compensated humidity data in integer.
*/
static uint32_t compensate_humidity(const struct bme280_uncomp_data *uncomp_data,
- const struct bme280_calib_data *calib_data);
+ const struct bme280_calib_data *calib_data);
#endif
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
-static int8_t set_osr_settings(uint8_t desired_settings, const struct bme280_settings *settings,
- const struct bme280_dev *dev);
+static int8_t set_osr_settings(uint8_t desired_settings,
+ const struct bme280_settings *settings,
+ const struct bme280_dev *dev);
/*!
* @brief This API sets the pressure and/or temperature oversampling settings
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
-static int8_t set_osr_press_temp_settings(uint8_t desired_settings, const struct bme280_settings *settings,
- const struct bme280_dev *dev);
+static int8_t set_osr_press_temp_settings(uint8_t desired_settings,
+ const struct bme280_settings *settings,
+ const struct bme280_dev *dev);
/*!
* @brief This internal API fills the pressure oversampling settings provided by
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
-static int8_t set_filter_standby_settings(uint8_t desired_settings, const struct bme280_settings *settings,
- const struct bme280_dev *dev);
+static int8_t set_filter_standby_settings(uint8_t desired_settings,
+ const struct bme280_settings *settings,
+ const struct bme280_dev *dev);
/*!
* @brief This internal API fills the filter settings provided by the user
*/
int8_t bme280_init(struct bme280_dev *dev)
{
- int8_t rslt;
- /* chip id read try count */
- uint8_t try_count = 5;
- uint8_t chip_id = 0;
-
- /* Check for null pointer in the device structure*/
- rslt = null_ptr_check(dev);
- /* Proceed if null check is fine */
- if (rslt == BME280_OK) {
- while (try_count) {
- /* Read the chip-id of bme280 sensor */
- rslt = bme280_get_regs(BME280_CHIP_ID_ADDR, &chip_id, 1, dev);
- /* Check for chip id validity */
- if ((rslt == BME280_OK) && (chip_id == BME280_CHIP_ID)) {
- dev->chip_id = chip_id;
- /* Reset the sensor */
- rslt = bme280_soft_reset(dev);
- if (rslt == BME280_OK) {
- /* Read the calibration data */
- rslt = get_calib_data(dev);
- }
- break;
- }
- /* Wait for 1 ms */
- dev->delay_ms(1);
- --try_count;
- }
- /* Chip id check failed */
- if (!try_count)
- rslt = BME280_E_DEV_NOT_FOUND;
- }
-
- return rslt;
+ int8_t rslt;
+
+ /* chip id read try count */
+ uint8_t try_count = 5;
+ uint8_t chip_id = 0;
+
+ /* Check for null pointer in the device structure*/
+ rslt = null_ptr_check(dev);
+
+ /* Proceed if null check is fine */
+ if (rslt == BME280_OK)
+ {
+ while (try_count)
+ {
+ /* Read the chip-id of bme280 sensor */
+ rslt = bme280_get_regs(BME280_CHIP_ID_ADDR, &chip_id, 1, dev);
+
+ /* Check for chip id validity */
+ if ((rslt == BME280_OK) && (chip_id == BME280_CHIP_ID))
+ {
+ dev->chip_id = chip_id;
+
+ /* Reset the sensor */
+ rslt = bme280_soft_reset(dev);
+ if (rslt == BME280_OK)
+ {
+ /* Read the calibration data */
+ rslt = get_calib_data(dev);
+ }
+ break;
+ }
+
+ /* Wait for 1 ms */
+ dev->delay_ms(1);
+ --try_count;
+ }
+
+ /* Chip id check failed */
+ if (!try_count)
+ {
+ rslt = BME280_E_DEV_NOT_FOUND;
+ }
+ }
+
+ return rslt;
}
/*!
*/
int8_t bme280_get_regs(uint8_t reg_addr, uint8_t *reg_data, uint16_t len, const struct bme280_dev *dev)
{
- int8_t rslt;
-
- /* Check for null pointer in the device structure*/
- rslt = null_ptr_check(dev);
- /* Proceed if null check is fine */
- if (rslt == BME280_OK) {
- /* If interface selected is SPI */
- if (dev->intf != BME280_I2C_INTF)
- reg_addr = reg_addr | 0x80;
- /* Read the data */
- rslt = dev->read(dev->dev_id, reg_addr, reg_data, len);
- /* Check for communication error */
- if (rslt != BME280_OK)
- rslt = BME280_E_COMM_FAIL;
- }
-
- return rslt;
+ int8_t rslt;
+
+ /* Check for null pointer in the device structure*/
+ rslt = null_ptr_check(dev);
+
+ /* Proceed if null check is fine */
+ if (rslt == BME280_OK)
+ {
+ /* If interface selected is SPI */
+ if (dev->intf != BME280_I2C_INTF)
+ {
+ reg_addr = reg_addr | 0x80;
+ }
+
+ /* Read the data */
+ rslt = dev->read(dev->dev_id, reg_addr, reg_data, len);
+
+ /* Check for communication error */
+ if (rslt != BME280_OK)
+ {
+ rslt = BME280_E_COMM_FAIL;
+ }
+ }
+
+ return rslt;
}
/*!
*/
int8_t bme280_set_regs(uint8_t *reg_addr, const uint8_t *reg_data, uint8_t len, const struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t temp_buff[20]; /* Typically not to write more than 10 registers */
-
- if (len > 10)
- len = 10;
-
- uint16_t temp_len;
- uint8_t reg_addr_cnt;
-
- /* Check for null pointer in the device structure*/
- rslt = null_ptr_check(dev);
- /* Check for arguments validity */
- if ((rslt == BME280_OK) && (reg_addr != NULL) && (reg_data != NULL)) {
- if (len != 0) {
- temp_buff[0] = reg_data[0];
- /* If interface selected is SPI */
- if (dev->intf != BME280_I2C_INTF) {
- for (reg_addr_cnt = 0; reg_addr_cnt < len; reg_addr_cnt++)
- reg_addr[reg_addr_cnt] = reg_addr[reg_addr_cnt] & 0x7F;
- }
- /* Burst write mode */
- if (len > 1) {
- /* Interleave register address w.r.t data for
- burst write*/
- interleave_reg_addr(reg_addr, temp_buff, reg_data, len);
- temp_len = ((len * 2) - 1);
- } else {
- temp_len = len;
- }
- rslt = dev->write(dev->dev_id, reg_addr[0], temp_buff, temp_len);
- /* Check for communication error */
- if (rslt != BME280_OK)
- rslt = BME280_E_COMM_FAIL;
- } else {
- rslt = BME280_E_INVALID_LEN;
- }
- } else {
- rslt = BME280_E_NULL_PTR;
- }
-
-
- return rslt;
+ int8_t rslt;
+ uint8_t temp_buff[20]; /* Typically not to write more than 10 registers */
+
+ if (len > 10)
+ {
+ len = 10;
+ }
+ uint16_t temp_len;
+ uint8_t reg_addr_cnt;
+
+ /* Check for null pointer in the device structure*/
+ rslt = null_ptr_check(dev);
+
+ /* Check for arguments validity */
+ if ((rslt == BME280_OK) && (reg_addr != NULL) && (reg_data != NULL))
+ {
+ if (len != 0)
+ {
+ temp_buff[0] = reg_data[0];
+
+ /* If interface selected is SPI */
+ if (dev->intf != BME280_I2C_INTF)
+ {
+ for (reg_addr_cnt = 0; reg_addr_cnt < len; reg_addr_cnt++)
+ {
+ reg_addr[reg_addr_cnt] = reg_addr[reg_addr_cnt] & 0x7F;
+ }
+ }
+
+ /* Burst write mode */
+ if (len > 1)
+ {
+ /* Interleave register address w.r.t data for
+ * burst write
+ */
+ interleave_reg_addr(reg_addr, temp_buff, reg_data, len);
+ temp_len = ((len * 2) - 1);
+ }
+ else
+ {
+ temp_len = len;
+ }
+ rslt = dev->write(dev->dev_id, reg_addr[0], temp_buff, temp_len);
+
+ /* Check for communication error */
+ if (rslt != BME280_OK)
+ {
+ rslt = BME280_E_COMM_FAIL;
+ }
+ }
+ else
+ {
+ rslt = BME280_E_INVALID_LEN;
+ }
+ }
+ else
+ {
+ rslt = BME280_E_NULL_PTR;
+ }
+
+ return rslt;
}
/*!
*/
int8_t bme280_set_sensor_settings(uint8_t desired_settings, const struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t sensor_mode;
-
- /* Check for null pointer in the device structure*/
- rslt = null_ptr_check(dev);
- /* Proceed if null check is fine */
- if (rslt == BME280_OK) {
- rslt = bme280_get_sensor_mode(&sensor_mode, dev);
- if ((rslt == BME280_OK) && (sensor_mode != BME280_SLEEP_MODE))
- rslt = put_device_to_sleep(dev);
- if (rslt == BME280_OK) {
- /* Check if user wants to change oversampling
- settings */
- if (are_settings_changed(OVERSAMPLING_SETTINGS, desired_settings))
- rslt = set_osr_settings(desired_settings, &dev->settings, dev);
- /* Check if user wants to change filter and/or
- standby settings */
- if ((rslt == BME280_OK) && are_settings_changed(FILTER_STANDBY_SETTINGS, desired_settings))
- rslt = set_filter_standby_settings(desired_settings, &dev->settings, dev);
- }
- }
-
- return rslt;
+ int8_t rslt;
+ uint8_t sensor_mode;
+
+ /* Check for null pointer in the device structure*/
+ rslt = null_ptr_check(dev);
+
+ /* Proceed if null check is fine */
+ if (rslt == BME280_OK)
+ {
+ rslt = bme280_get_sensor_mode(&sensor_mode, dev);
+ if ((rslt == BME280_OK) && (sensor_mode != BME280_SLEEP_MODE))
+ {
+ rslt = put_device_to_sleep(dev);
+ }
+ if (rslt == BME280_OK)
+ {
+ /* Check if user wants to change oversampling
+ * settings
+ */
+ if (are_settings_changed(OVERSAMPLING_SETTINGS, desired_settings))
+ {
+ rslt = set_osr_settings(desired_settings, &dev->settings, dev);
+ }
+
+ /* Check if user wants to change filter and/or
+ * standby settings
+ */
+ if ((rslt == BME280_OK) && are_settings_changed(FILTER_STANDBY_SETTINGS, desired_settings))
+ {
+ rslt = set_filter_standby_settings(desired_settings, &dev->settings, dev);
+ }
+ }
+ }
+
+ return rslt;
}
/*!
*/
int8_t bme280_get_sensor_settings(struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t reg_data[4];
-
- /* Check for null pointer in the device structure*/
- rslt = null_ptr_check(dev);
- /* Proceed if null check is fine */
- if (rslt == BME280_OK) {
- rslt = bme280_get_regs(BME280_CTRL_HUM_ADDR, reg_data, 4, dev);
- if (rslt == BME280_OK)
- parse_device_settings(reg_data, &dev->settings);
- }
-
- return rslt;
+ int8_t rslt;
+ uint8_t reg_data[4];
+
+ /* Check for null pointer in the device structure*/
+ rslt = null_ptr_check(dev);
+
+ /* Proceed if null check is fine */
+ if (rslt == BME280_OK)
+ {
+ rslt = bme280_get_regs(BME280_CTRL_HUM_ADDR, reg_data, 4, dev);
+ if (rslt == BME280_OK)
+ {
+ parse_device_settings(reg_data, &dev->settings);
+ }
+ }
+
+ return rslt;
}
/*!
*/
int8_t bme280_set_sensor_mode(uint8_t sensor_mode, const struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t last_set_mode;
-
- /* Check for null pointer in the device structure*/
- rslt = null_ptr_check(dev);
-
- if (rslt == BME280_OK) {
- rslt = bme280_get_sensor_mode(&last_set_mode, dev);
- /* If the sensor is not in sleep mode put the device to sleep
- mode */
- if ((rslt == BME280_OK) && (last_set_mode != BME280_SLEEP_MODE))
- rslt = put_device_to_sleep(dev);
- /* Set the power mode */
- if (rslt == BME280_OK)
- rslt = write_power_mode(sensor_mode, dev);
- }
-
- return rslt;
+ int8_t rslt;
+ uint8_t last_set_mode;
+
+ /* Check for null pointer in the device structure*/
+ rslt = null_ptr_check(dev);
+ if (rslt == BME280_OK)
+ {
+ rslt = bme280_get_sensor_mode(&last_set_mode, dev);
+
+ /* If the sensor is not in sleep mode put the device to sleep
+ * mode
+ */
+ if ((rslt == BME280_OK) && (last_set_mode != BME280_SLEEP_MODE))
+ {
+ rslt = put_device_to_sleep(dev);
+ }
+
+ /* Set the power mode */
+ if (rslt == BME280_OK)
+ {
+ rslt = write_power_mode(sensor_mode, dev);
+ }
+ }
+
+ return rslt;
}
/*!
*/
int8_t bme280_get_sensor_mode(uint8_t *sensor_mode, const struct bme280_dev *dev)
{
- int8_t rslt;
+ int8_t rslt;
- /* Check for null pointer in the device structure*/
- rslt = null_ptr_check(dev);
+ /* Check for null pointer in the device structure*/
+ rslt = null_ptr_check(dev);
+ if (rslt == BME280_OK)
+ {
+ /* Read the power mode register */
+ rslt = bme280_get_regs(BME280_PWR_CTRL_ADDR, sensor_mode, 1, dev);
- if (rslt == BME280_OK) {
- /* Read the power mode register */
- rslt = bme280_get_regs(BME280_PWR_CTRL_ADDR, sensor_mode, 1, dev);
- /* Assign the power mode in the device structure */
- *sensor_mode = BME280_GET_BITS_POS_0(*sensor_mode, BME280_SENSOR_MODE);
- }
+ /* Assign the power mode in the device structure */
+ *sensor_mode = BME280_GET_BITS_POS_0(*sensor_mode, BME280_SENSOR_MODE);
+ }
- return rslt;
+ return rslt;
}
/*!
*/
int8_t bme280_soft_reset(const struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t reg_addr = BME280_RESET_ADDR;
- /* 0xB6 is the soft reset command */
- uint8_t soft_rst_cmd = 0xB6;
-
- /* Check for null pointer in the device structure*/
- rslt = null_ptr_check(dev);
- /* Proceed if null check is fine */
- if (rslt == BME280_OK) {
- /* Write the soft reset command in the sensor */
- rslt = bme280_set_regs(®_addr, &soft_rst_cmd, 1, dev);
- /* As per data sheet, startup time is 2 ms. */
- dev->delay_ms(2);
- }
-
- return rslt;
+ int8_t rslt;
+ uint8_t reg_addr = BME280_RESET_ADDR;
+
+ /* 0xB6 is the soft reset command */
+ uint8_t soft_rst_cmd = 0xB6;
+
+ /* Check for null pointer in the device structure*/
+ rslt = null_ptr_check(dev);
+
+ /* Proceed if null check is fine */
+ if (rslt == BME280_OK)
+ {
+ /* Write the soft reset command in the sensor */
+ rslt = bme280_set_regs(®_addr, &soft_rst_cmd, 1, dev);
+
+ /* As per data sheet, startup time is 2 ms. */
+ dev->delay_ms(2);
+ }
+
+ return rslt;
}
/*!
*/
int8_t bme280_get_sensor_data(uint8_t sensor_comp, struct bme280_data *comp_data, struct bme280_dev *dev)
{
- int8_t rslt;
- /* Array to store the pressure, temperature and humidity data read from
- the sensor */
- uint8_t reg_data[BME280_P_T_H_DATA_LEN] = {0};
- struct bme280_uncomp_data uncomp_data = {0};
-
- /* Check for null pointer in the device structure*/
- rslt = null_ptr_check(dev);
-
- if ((rslt == BME280_OK) && (comp_data != NULL)) {
- /* Read the pressure and temperature data from the sensor */
- rslt = bme280_get_regs(BME280_DATA_ADDR, reg_data, BME280_P_T_H_DATA_LEN, dev);
-
- if (rslt == BME280_OK) {
- /* Parse the read data from the sensor */
- bme280_parse_sensor_data(reg_data, &uncomp_data);
- /* Compensate the pressure and/or temperature and/or
- humidity data from the sensor */
- rslt = bme280_compensate_data(sensor_comp, &uncomp_data, comp_data, &dev->calib_data);
- }
- } else {
- rslt = BME280_E_NULL_PTR;
- }
-
- return rslt;
+ int8_t rslt;
+
+ /* Array to store the pressure, temperature and humidity data read from
+ * the sensor
+ */
+ uint8_t reg_data[BME280_P_T_H_DATA_LEN] = { 0 };
+ struct bme280_uncomp_data uncomp_data = { 0 };
+
+ /* Check for null pointer in the device structure*/
+ rslt = null_ptr_check(dev);
+ if ((rslt == BME280_OK) && (comp_data != NULL))
+ {
+ /* Read the pressure and temperature data from the sensor */
+ rslt = bme280_get_regs(BME280_DATA_ADDR, reg_data, BME280_P_T_H_DATA_LEN, dev);
+ if (rslt == BME280_OK)
+ {
+ /* Parse the read data from the sensor */
+ bme280_parse_sensor_data(reg_data, &uncomp_data);
+
+ /* Compensate the pressure and/or temperature and/or
+ * humidity data from the sensor
+ */
+ rslt = bme280_compensate_data(sensor_comp, &uncomp_data, comp_data, &dev->calib_data);
+ }
+ }
+ else
+ {
+ rslt = BME280_E_NULL_PTR;
+ }
+
+ return rslt;
}
/*!
*/
void bme280_parse_sensor_data(const uint8_t *reg_data, struct bme280_uncomp_data *uncomp_data)
{
- /* Variables to store the sensor data */
- uint32_t data_xlsb;
- uint32_t data_lsb;
- uint32_t data_msb;
-
- /* Store the parsed register values for pressure data */
- data_msb = (uint32_t)reg_data[0] << 12;
- data_lsb = (uint32_t)reg_data[1] << 4;
- data_xlsb = (uint32_t)reg_data[2] >> 4;
- uncomp_data->pressure = data_msb | data_lsb | data_xlsb;
-
- /* Store the parsed register values for temperature data */
- data_msb = (uint32_t)reg_data[3] << 12;
- data_lsb = (uint32_t)reg_data[4] << 4;
- data_xlsb = (uint32_t)reg_data[5] >> 4;
- uncomp_data->temperature = data_msb | data_lsb | data_xlsb;
-
- /* Store the parsed register values for temperature data */
- data_lsb = (uint32_t)reg_data[6] << 8;
- data_msb = (uint32_t)reg_data[7];
- uncomp_data->humidity = data_msb | data_lsb;
+ /* Variables to store the sensor data */
+ uint32_t data_xlsb;
+ uint32_t data_lsb;
+ uint32_t data_msb;
+
+ /* Store the parsed register values for pressure data */
+ data_msb = (uint32_t)reg_data[0] << 12;
+ data_lsb = (uint32_t)reg_data[1] << 4;
+ data_xlsb = (uint32_t)reg_data[2] >> 4;
+ uncomp_data->pressure = data_msb | data_lsb | data_xlsb;
+
+ /* Store the parsed register values for temperature data */
+ data_msb = (uint32_t)reg_data[3] << 12;
+ data_lsb = (uint32_t)reg_data[4] << 4;
+ data_xlsb = (uint32_t)reg_data[5] >> 4;
+ uncomp_data->temperature = data_msb | data_lsb | data_xlsb;
+
+ /* Store the parsed register values for temperature data */
+ data_lsb = (uint32_t)reg_data[6] << 8;
+ data_msb = (uint32_t)reg_data[7];
+ uncomp_data->humidity = data_msb | data_lsb;
}
-
/*!
* @brief This API is used to compensate the pressure and/or
* temperature and/or humidity data according to the component selected
* by the user.
*/
-int8_t bme280_compensate_data(uint8_t sensor_comp, const struct bme280_uncomp_data *uncomp_data,
- struct bme280_data *comp_data, struct bme280_calib_data *calib_data)
+int8_t bme280_compensate_data(uint8_t sensor_comp,
+ const struct bme280_uncomp_data *uncomp_data,
+ struct bme280_data *comp_data,
+ struct bme280_calib_data *calib_data)
{
- int8_t rslt = BME280_OK;
-
- if ((uncomp_data != NULL) && (comp_data != NULL) && (calib_data != NULL)) {
- /* Initialize to zero */
- comp_data->temperature = 0;
- comp_data->pressure = 0;
- comp_data->humidity = 0;
- /* If pressure or temperature component is selected */
- if (sensor_comp & (BME280_PRESS | BME280_TEMP | BME280_HUM)) {
- /* Compensate the temperature data */
- comp_data->temperature = compensate_temperature(uncomp_data, calib_data);
- }
- if (sensor_comp & BME280_PRESS) {
- /* Compensate the pressure data */
- comp_data->pressure = compensate_pressure(uncomp_data, calib_data);
- }
- if (sensor_comp & BME280_HUM) {
- /* Compensate the humidity data */
- comp_data->humidity = compensate_humidity(uncomp_data, calib_data);
- }
- } else {
- rslt = BME280_E_NULL_PTR;
- }
-
- return rslt;
+ int8_t rslt = BME280_OK;
+
+ if ((uncomp_data != NULL) && (comp_data != NULL) && (calib_data != NULL))
+ {
+ /* Initialize to zero */
+ comp_data->temperature = 0;
+ comp_data->pressure = 0;
+ comp_data->humidity = 0;
+
+ /* If pressure or temperature component is selected */
+ if (sensor_comp & (BME280_PRESS | BME280_TEMP | BME280_HUM))
+ {
+ /* Compensate the temperature data */
+ comp_data->temperature = compensate_temperature(uncomp_data, calib_data);
+ }
+ if (sensor_comp & BME280_PRESS)
+ {
+ /* Compensate the pressure data */
+ comp_data->pressure = compensate_pressure(uncomp_data, calib_data);
+ }
+ if (sensor_comp & BME280_HUM)
+ {
+ /* Compensate the humidity data */
+ comp_data->humidity = compensate_humidity(uncomp_data, calib_data);
+ }
+ }
+ else
+ {
+ rslt = BME280_E_NULL_PTR;
+ }
+
+ return rslt;
}
/*!
* @brief This internal API sets the oversampling settings for pressure,
* temperature and humidity in the sensor.
*/
-static int8_t set_osr_settings(uint8_t desired_settings, const struct bme280_settings *settings,
- const struct bme280_dev *dev)
+static int8_t set_osr_settings(uint8_t desired_settings,
+ const struct bme280_settings *settings,
+ const struct bme280_dev *dev)
{
- int8_t rslt = BME280_W_INVALID_OSR_MACRO;
-
- if (desired_settings & BME280_OSR_HUM_SEL)
- rslt = set_osr_humidity_settings(settings, dev);
- if (desired_settings & (BME280_OSR_PRESS_SEL | BME280_OSR_TEMP_SEL))
- rslt = set_osr_press_temp_settings(desired_settings, settings, dev);
-
- return rslt;
+ int8_t rslt = BME280_W_INVALID_OSR_MACRO;
+
+ if (desired_settings & BME280_OSR_HUM_SEL)
+ {
+ rslt = set_osr_humidity_settings(settings, dev);
+ }
+ if (desired_settings & (BME280_OSR_PRESS_SEL | BME280_OSR_TEMP_SEL))
+ {
+ rslt = set_osr_press_temp_settings(desired_settings, settings, dev);
+ }
+
+ return rslt;
}
/*!
*/
static int8_t set_osr_humidity_settings(const struct bme280_settings *settings, const struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t ctrl_hum;
- uint8_t ctrl_meas;
- uint8_t reg_addr = BME280_CTRL_HUM_ADDR;
-
- ctrl_hum = settings->osr_h & BME280_CTRL_HUM_MSK;
- /* Write the humidity control value in the register */
- rslt = bme280_set_regs(®_addr, &ctrl_hum, 1, dev);
- /* Humidity related changes will be only effective after a
- write operation to ctrl_meas register */
- if (rslt == BME280_OK) {
- reg_addr = BME280_CTRL_MEAS_ADDR;
- rslt = bme280_get_regs(reg_addr, &ctrl_meas, 1, dev);
- if (rslt == BME280_OK)
- rslt = bme280_set_regs(®_addr, &ctrl_meas, 1, dev);
- }
-
- return rslt;
+ int8_t rslt;
+ uint8_t ctrl_hum;
+ uint8_t ctrl_meas;
+ uint8_t reg_addr = BME280_CTRL_HUM_ADDR;
+
+ ctrl_hum = settings->osr_h & BME280_CTRL_HUM_MSK;
+
+ /* Write the humidity control value in the register */
+ rslt = bme280_set_regs(®_addr, &ctrl_hum, 1, dev);
+
+ /* Humidity related changes will be only effective after a
+ * write operation to ctrl_meas register
+ */
+ if (rslt == BME280_OK)
+ {
+ reg_addr = BME280_CTRL_MEAS_ADDR;
+ rslt = bme280_get_regs(reg_addr, &ctrl_meas, 1, dev);
+ if (rslt == BME280_OK)
+ {
+ rslt = bme280_set_regs(®_addr, &ctrl_meas, 1, dev);
+ }
+ }
+
+ return rslt;
}
/*!
* @brief This API sets the pressure and/or temperature oversampling settings
* in the sensor according to the settings selected by the user.
*/
-static int8_t set_osr_press_temp_settings(uint8_t desired_settings, const struct bme280_settings *settings,
- const struct bme280_dev *dev)
+static int8_t set_osr_press_temp_settings(uint8_t desired_settings,
+ const struct bme280_settings *settings,
+ const struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t reg_addr = BME280_CTRL_MEAS_ADDR;
- uint8_t reg_data;
-
- rslt = bme280_get_regs(reg_addr, ®_data, 1, dev);
-
- if (rslt == BME280_OK) {
- if (desired_settings & BME280_OSR_PRESS_SEL)
- fill_osr_press_settings(®_data, settings);
- if (desired_settings & BME280_OSR_TEMP_SEL)
- fill_osr_temp_settings(®_data, settings);
- /* Write the oversampling settings in the register */
- rslt = bme280_set_regs(®_addr, ®_data, 1, dev);
- }
-
- return rslt;
+ int8_t rslt;
+ uint8_t reg_addr = BME280_CTRL_MEAS_ADDR;
+ uint8_t reg_data;
+
+ rslt = bme280_get_regs(reg_addr, ®_data, 1, dev);
+ if (rslt == BME280_OK)
+ {
+ if (desired_settings & BME280_OSR_PRESS_SEL)
+ {
+ fill_osr_press_settings(®_data, settings);
+ }
+ if (desired_settings & BME280_OSR_TEMP_SEL)
+ {
+ fill_osr_temp_settings(®_data, settings);
+ }
+
+ /* Write the oversampling settings in the register */
+ rslt = bme280_set_regs(®_addr, ®_data, 1, dev);
+ }
+
+ return rslt;
}
/*!
* @brief This internal API sets the filter and/or standby duration settings
* in the sensor according to the settings selected by the user.
*/
-static int8_t set_filter_standby_settings(uint8_t desired_settings, const struct bme280_settings *settings,
- const struct bme280_dev *dev)
+static int8_t set_filter_standby_settings(uint8_t desired_settings,
+ const struct bme280_settings *settings,
+ const struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t reg_addr = BME280_CONFIG_ADDR;
- uint8_t reg_data;
-
- rslt = bme280_get_regs(reg_addr, ®_data, 1, dev);
-
- if (rslt == BME280_OK) {
- if (desired_settings & BME280_FILTER_SEL)
- fill_filter_settings(®_data, settings);
- if (desired_settings & BME280_STANDBY_SEL)
- fill_standby_settings(®_data, settings);
- /* Write the oversampling settings in the register */
- rslt = bme280_set_regs(®_addr, ®_data, 1, dev);
- }
-
- return rslt;
+ int8_t rslt;
+ uint8_t reg_addr = BME280_CONFIG_ADDR;
+ uint8_t reg_data;
+
+ rslt = bme280_get_regs(reg_addr, ®_data, 1, dev);
+ if (rslt == BME280_OK)
+ {
+ if (desired_settings & BME280_FILTER_SEL)
+ {
+ fill_filter_settings(®_data, settings);
+ }
+ if (desired_settings & BME280_STANDBY_SEL)
+ {
+ fill_standby_settings(®_data, settings);
+ }
+
+ /* Write the oversampling settings in the register */
+ rslt = bme280_set_regs(®_addr, ®_data, 1, dev);
+ }
+
+ return rslt;
}
/*!
*/
static void fill_filter_settings(uint8_t *reg_data, const struct bme280_settings *settings)
{
- *reg_data = BME280_SET_BITS(*reg_data, BME280_FILTER, settings->filter);
+ *reg_data = BME280_SET_BITS(*reg_data, BME280_FILTER, settings->filter);
}
/*!
*/
static void fill_standby_settings(uint8_t *reg_data, const struct bme280_settings *settings)
{
- *reg_data = BME280_SET_BITS(*reg_data, BME280_STANDBY, settings->standby_time);
+ *reg_data = BME280_SET_BITS(*reg_data, BME280_STANDBY, settings->standby_time);
}
/*!
*/
static void fill_osr_press_settings(uint8_t *reg_data, const struct bme280_settings *settings)
{
- *reg_data = BME280_SET_BITS(*reg_data, BME280_CTRL_PRESS, settings->osr_p);
+ *reg_data = BME280_SET_BITS(*reg_data, BME280_CTRL_PRESS, settings->osr_p);
}
/*!
*/
static void fill_osr_temp_settings(uint8_t *reg_data, const struct bme280_settings *settings)
{
- *reg_data = BME280_SET_BITS(*reg_data, BME280_CTRL_TEMP, settings->osr_t);
+ *reg_data = BME280_SET_BITS(*reg_data, BME280_CTRL_TEMP, settings->osr_t);
}
/*!
*/
static void parse_device_settings(const uint8_t *reg_data, struct bme280_settings *settings)
{
- settings->osr_h = BME280_GET_BITS_POS_0(reg_data[0], BME280_CTRL_HUM);
- settings->osr_p = BME280_GET_BITS(reg_data[2], BME280_CTRL_PRESS);
- settings->osr_t = BME280_GET_BITS(reg_data[2], BME280_CTRL_TEMP);
- settings->filter = BME280_GET_BITS(reg_data[3], BME280_FILTER);
- settings->standby_time = BME280_GET_BITS(reg_data[3], BME280_STANDBY);
+ settings->osr_h = BME280_GET_BITS_POS_0(reg_data[0], BME280_CTRL_HUM);
+ settings->osr_p = BME280_GET_BITS(reg_data[2], BME280_CTRL_PRESS);
+ settings->osr_t = BME280_GET_BITS(reg_data[2], BME280_CTRL_TEMP);
+ settings->filter = BME280_GET_BITS(reg_data[3], BME280_FILTER);
+ settings->standby_time = BME280_GET_BITS(reg_data[3], BME280_STANDBY);
}
+
/*!
* @brief This internal API writes the power mode in the sensor.
*/
static int8_t write_power_mode(uint8_t sensor_mode, const struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t reg_addr = BME280_PWR_CTRL_ADDR;
- /* Variable to store the value read from power mode register */
- uint8_t sensor_mode_reg_val;
-
- /* Read the power mode register */
- rslt = bme280_get_regs(reg_addr, &sensor_mode_reg_val, 1, dev);
- /* Set the power mode */
- if (rslt == BME280_OK) {
- sensor_mode_reg_val = BME280_SET_BITS_POS_0(sensor_mode_reg_val, BME280_SENSOR_MODE, sensor_mode);
- /* Write the power mode in the register */
- rslt = bme280_set_regs(®_addr, &sensor_mode_reg_val, 1, dev);
- }
-
- return rslt;
+ int8_t rslt;
+ uint8_t reg_addr = BME280_PWR_CTRL_ADDR;
+
+ /* Variable to store the value read from power mode register */
+ uint8_t sensor_mode_reg_val;
+
+ /* Read the power mode register */
+ rslt = bme280_get_regs(reg_addr, &sensor_mode_reg_val, 1, dev);
+
+ /* Set the power mode */
+ if (rslt == BME280_OK)
+ {
+ sensor_mode_reg_val = BME280_SET_BITS_POS_0(sensor_mode_reg_val, BME280_SENSOR_MODE, sensor_mode);
+
+ /* Write the power mode in the register */
+ rslt = bme280_set_regs(®_addr, &sensor_mode_reg_val, 1, dev);
+ }
+
+ return rslt;
}
/*!
*/
static int8_t put_device_to_sleep(const struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t reg_data[4];
- struct bme280_settings settings;
-
- rslt = bme280_get_regs(BME280_CTRL_HUM_ADDR, reg_data, 4, dev);
- if (rslt == BME280_OK) {
- parse_device_settings(reg_data, &settings);
- rslt = bme280_soft_reset(dev);
- if (rslt == BME280_OK)
- rslt = reload_device_settings(&settings, dev);
- }
-
- return rslt;
+ int8_t rslt;
+ uint8_t reg_data[4];
+ struct bme280_settings settings;
+
+ rslt = bme280_get_regs(BME280_CTRL_HUM_ADDR, reg_data, 4, dev);
+ if (rslt == BME280_OK)
+ {
+ parse_device_settings(reg_data, &settings);
+ rslt = bme280_soft_reset(dev);
+ if (rslt == BME280_OK)
+ {
+ rslt = reload_device_settings(&settings, dev);
+ }
+ }
+
+ return rslt;
}
/*!
*/
static int8_t reload_device_settings(const struct bme280_settings *settings, const struct bme280_dev *dev)
{
- int8_t rslt;
+ int8_t rslt;
- rslt = set_osr_settings(BME280_ALL_SETTINGS_SEL, settings, dev);
- if (rslt == BME280_OK)
- rslt = set_filter_standby_settings(BME280_ALL_SETTINGS_SEL, settings, dev);
+ rslt = set_osr_settings(BME280_ALL_SETTINGS_SEL, settings, dev);
+ if (rslt == BME280_OK)
+ {
+ rslt = set_filter_standby_settings(BME280_ALL_SETTINGS_SEL, settings, dev);
+ }
- return rslt;
+ return rslt;
}
#ifdef BME280_FLOAT_ENABLE
+
/*!
* @brief This internal API is used to compensate the raw temperature data and
* return the compensated temperature data in double data type.
*/
-static double compensate_temperature(const struct bme280_uncomp_data *uncomp_data,
- struct bme280_calib_data *calib_data)
+static double compensate_temperature(const struct bme280_uncomp_data *uncomp_data, struct bme280_calib_data *calib_data)
{
- double var1;
- double var2;
- double temperature;
- double temperature_min = -40;
- double temperature_max = 85;
-
- var1 = ((double)uncomp_data->temperature) / 16384.0 - ((double)calib_data->dig_T1) / 1024.0;
- var1 = var1 * ((double)calib_data->dig_T2);
- var2 = (((double)uncomp_data->temperature) / 131072.0 - ((double)calib_data->dig_T1) / 8192.0);
- var2 = (var2 * var2) * ((double)calib_data->dig_T3);
- calib_data->t_fine = (int32_t)(var1 + var2);
- temperature = (var1 + var2) / 5120.0;
-
- if (temperature < temperature_min)
- temperature = temperature_min;
- else if (temperature > temperature_max)
- temperature = temperature_max;
-
- return temperature;
+ double var1;
+ double var2;
+ double temperature;
+ double temperature_min = -40;
+ double temperature_max = 85;
+
+ var1 = ((double)uncomp_data->temperature) / 16384.0 - ((double)calib_data->dig_T1) / 1024.0;
+ var1 = var1 * ((double)calib_data->dig_T2);
+ var2 = (((double)uncomp_data->temperature) / 131072.0 - ((double)calib_data->dig_T1) / 8192.0);
+ var2 = (var2 * var2) * ((double)calib_data->dig_T3);
+ calib_data->t_fine = (int32_t)(var1 + var2);
+ temperature = (var1 + var2) / 5120.0;
+ if (temperature < temperature_min)
+ {
+ temperature = temperature_min;
+ }
+ else if (temperature > temperature_max)
+ {
+ temperature = temperature_max;
+ }
+
+ return temperature;
}
/*!
* return the compensated pressure data in double data type.
*/
static double compensate_pressure(const struct bme280_uncomp_data *uncomp_data,
- const struct bme280_calib_data *calib_data)
+ const struct bme280_calib_data *calib_data)
{
- double var1;
- double var2;
- double var3;
- double pressure;
- double pressure_min = 30000.0;
- double pressure_max = 110000.0;
-
- var1 = ((double)calib_data->t_fine / 2.0) - 64000.0;
- var2 = var1 * var1 * ((double)calib_data->dig_P6) / 32768.0;
- var2 = var2 + var1 * ((double)calib_data->dig_P5) * 2.0;
- var2 = (var2 / 4.0) + (((double)calib_data->dig_P4) * 65536.0);
- var3 = ((double)calib_data->dig_P3) * var1 * var1 / 524288.0;
- var1 = (var3 + ((double)calib_data->dig_P2) * var1) / 524288.0;
- var1 = (1.0 + var1 / 32768.0) * ((double)calib_data->dig_P1);
- /* avoid exception caused by division by zero */
- if (var1) {
- pressure = 1048576.0 - (double) uncomp_data->pressure;
- pressure = (pressure - (var2 / 4096.0)) * 6250.0 / var1;
- var1 = ((double)calib_data->dig_P9) * pressure * pressure / 2147483648.0;
- var2 = pressure * ((double)calib_data->dig_P8) / 32768.0;
- pressure = pressure + (var1 + var2 + ((double)calib_data->dig_P7)) / 16.0;
-
- if (pressure < pressure_min)
- pressure = pressure_min;
- else if (pressure > pressure_max)
- pressure = pressure_max;
- } else { /* Invalid case */
- pressure = pressure_min;
- }
-
- return pressure;
+ double var1;
+ double var2;
+ double var3;
+ double pressure;
+ double pressure_min = 30000.0;
+ double pressure_max = 110000.0;
+
+ var1 = ((double)calib_data->t_fine / 2.0) - 64000.0;
+ var2 = var1 * var1 * ((double)calib_data->dig_P6) / 32768.0;
+ var2 = var2 + var1 * ((double)calib_data->dig_P5) * 2.0;
+ var2 = (var2 / 4.0) + (((double)calib_data->dig_P4) * 65536.0);
+ var3 = ((double)calib_data->dig_P3) * var1 * var1 / 524288.0;
+ var1 = (var3 + ((double)calib_data->dig_P2) * var1) / 524288.0;
+ var1 = (1.0 + var1 / 32768.0) * ((double)calib_data->dig_P1);
+
+ /* avoid exception caused by division by zero */
+ if (var1)
+ {
+ pressure = 1048576.0 - (double) uncomp_data->pressure;
+ pressure = (pressure - (var2 / 4096.0)) * 6250.0 / var1;
+ var1 = ((double)calib_data->dig_P9) * pressure * pressure / 2147483648.0;
+ var2 = pressure * ((double)calib_data->dig_P8) / 32768.0;
+ pressure = pressure + (var1 + var2 + ((double)calib_data->dig_P7)) / 16.0;
+ if (pressure < pressure_min)
+ {
+ pressure = pressure_min;
+ }
+ else if (pressure > pressure_max)
+ {
+ pressure = pressure_max;
+ }
+ }
+ else /* Invalid case */
+ {
+ pressure = pressure_min;
+ }
+
+ return pressure;
}
/*!
* return the compensated humidity data in double data type.
*/
static double compensate_humidity(const struct bme280_uncomp_data *uncomp_data,
- const struct bme280_calib_data *calib_data)
+ const struct bme280_calib_data *calib_data)
{
- double humidity;
- double humidity_min = 0.0;
- double humidity_max = 100.0;
- double var1;
- double var2;
- double var3;
- double var4;
- double var5;
- double var6;
-
- var1 = ((double)calib_data->t_fine) - 76800.0;
- var2 = (((double)calib_data->dig_H4) * 64.0 + (((double)calib_data->dig_H5) / 16384.0) * var1);
- var3 = uncomp_data->humidity - var2;
- var4 = ((double)calib_data->dig_H2) / 65536.0;
- var5 = (1.0 + (((double)calib_data->dig_H3) / 67108864.0) * var1);
- var6 = 1.0 + (((double)calib_data->dig_H6) / 67108864.0) * var1 * var5;
- var6 = var3 * var4 * (var5 * var6);
- humidity = var6 * (1.0 - ((double)calib_data->dig_H1) * var6 / 524288.0);
-
- if (humidity > humidity_max)
- humidity = humidity_max;
- else if (humidity < humidity_min)
- humidity = humidity_min;
-
- return humidity;
+ double humidity;
+ double humidity_min = 0.0;
+ double humidity_max = 100.0;
+ double var1;
+ double var2;
+ double var3;
+ double var4;
+ double var5;
+ double var6;
+
+ var1 = ((double)calib_data->t_fine) - 76800.0;
+ var2 = (((double)calib_data->dig_H4) * 64.0 + (((double)calib_data->dig_H5) / 16384.0) * var1);
+ var3 = uncomp_data->humidity - var2;
+ var4 = ((double)calib_data->dig_H2) / 65536.0;
+ var5 = (1.0 + (((double)calib_data->dig_H3) / 67108864.0) * var1);
+ var6 = 1.0 + (((double)calib_data->dig_H6) / 67108864.0) * var1 * var5;
+ var6 = var3 * var4 * (var5 * var6);
+ humidity = var6 * (1.0 - ((double)calib_data->dig_H1) * var6 / 524288.0);
+ if (humidity > humidity_max)
+ {
+ humidity = humidity_max;
+ }
+ else if (humidity < humidity_min)
+ {
+ humidity = humidity_min;
+ }
+
+ return humidity;
}
#else
+
/*!
* @brief This internal API is used to compensate the raw temperature data and
* return the compensated temperature data in integer data type.
*/
static int32_t compensate_temperature(const struct bme280_uncomp_data *uncomp_data,
- struct bme280_calib_data *calib_data)
+ struct bme280_calib_data *calib_data)
{
- int32_t var1;
- int32_t var2;
- int32_t temperature;
- int32_t temperature_min = -4000;
- int32_t temperature_max = 8500;
-
- var1 = (int32_t)((uncomp_data->temperature / 8) - ((int32_t)calib_data->dig_T1 * 2));
- var1 = (var1 * ((int32_t)calib_data->dig_T2)) / 2048;
- var2 = (int32_t)((uncomp_data->temperature / 16) - ((int32_t)calib_data->dig_T1));
- var2 = (((var2 * var2) / 4096) * ((int32_t)calib_data->dig_T3)) / 16384;
- calib_data->t_fine = var1 + var2;
- temperature = (calib_data->t_fine * 5 + 128) / 256;
-
- if (temperature < temperature_min)
- temperature = temperature_min;
- else if (temperature > temperature_max)
- temperature = temperature_max;
-
- return temperature;
+ int32_t var1;
+ int32_t var2;
+ int32_t temperature;
+ int32_t temperature_min = -4000;
+ int32_t temperature_max = 8500;
+
+ var1 = (int32_t)((uncomp_data->temperature / 8) - ((int32_t)calib_data->dig_T1 * 2));
+ var1 = (var1 * ((int32_t)calib_data->dig_T2)) / 2048;
+ var2 = (int32_t)((uncomp_data->temperature / 16) - ((int32_t)calib_data->dig_T1));
+ var2 = (((var2 * var2) / 4096) * ((int32_t)calib_data->dig_T3)) / 16384;
+ calib_data->t_fine = var1 + var2;
+ temperature = (calib_data->t_fine * 5 + 128) / 256;
+ if (temperature < temperature_min)
+ {
+ temperature = temperature_min;
+ }
+ else if (temperature > temperature_max)
+ {
+ temperature = temperature_max;
+ }
+
+ return temperature;
}
#ifdef BME280_64BIT_ENABLE
+
/*!
* @brief This internal API is used to compensate the raw pressure data and
* return the compensated pressure data in integer data type with higher
* accuracy.
*/
static uint32_t compensate_pressure(const struct bme280_uncomp_data *uncomp_data,
- const struct bme280_calib_data *calib_data)
+ const struct bme280_calib_data *calib_data)
{
- int64_t var1;
- int64_t var2;
- int64_t var3;
- int64_t var4;
- uint32_t pressure;
- uint32_t pressure_min = 3000000;
- uint32_t pressure_max = 11000000;
-
- var1 = ((int64_t)calib_data->t_fine) - 128000;
- var2 = var1 * var1 * (int64_t)calib_data->dig_P6;
- var2 = var2 + ((var1 * (int64_t)calib_data->dig_P5) * 131072);
- var2 = var2 + (((int64_t)calib_data->dig_P4) * 34359738368);
- var1 = ((var1 * var1 * (int64_t)calib_data->dig_P3) / 256) + ((var1 * ((int64_t)calib_data->dig_P2) * 4096));
- var3 = ((int64_t)1) * 140737488355328;
- var1 = (var3 + var1) * ((int64_t)calib_data->dig_P1) / 8589934592;
-
- /* To avoid divide by zero exception */
- if (var1 != 0) {
- var4 = 1048576 - uncomp_data->pressure;
- var4 = (((var4 * 2147483648) - var2) * 3125) / var1;
- var1 = (((int64_t)calib_data->dig_P9) * (var4 / 8192) * (var4 / 8192)) / 33554432;
- var2 = (((int64_t)calib_data->dig_P8) * var4) / 524288;
- var4 = ((var4 + var1 + var2) / 256) + (((int64_t)calib_data->dig_P7) * 16);
- pressure = (uint32_t)(((var4 / 2) * 100) / 128);
-
- if (pressure < pressure_min)
- pressure = pressure_min;
- else if (pressure > pressure_max)
- pressure = pressure_max;
- } else {
- pressure = pressure_min;
- }
-
- return pressure;
+ int64_t var1;
+ int64_t var2;
+ int64_t var3;
+ int64_t var4;
+ uint32_t pressure;
+ uint32_t pressure_min = 3000000;
+ uint32_t pressure_max = 11000000;
+
+ var1 = ((int64_t)calib_data->t_fine) - 128000;
+ var2 = var1 * var1 * (int64_t)calib_data->dig_P6;
+ var2 = var2 + ((var1 * (int64_t)calib_data->dig_P5) * 131072);
+ var2 = var2 + (((int64_t)calib_data->dig_P4) * 34359738368);
+ var1 = ((var1 * var1 * (int64_t)calib_data->dig_P3) / 256) + ((var1 * ((int64_t)calib_data->dig_P2) * 4096));
+ var3 = ((int64_t)1) * 140737488355328;
+ var1 = (var3 + var1) * ((int64_t)calib_data->dig_P1) / 8589934592;
+
+ /* To avoid divide by zero exception */
+ if (var1 != 0)
+ {
+ var4 = 1048576 - uncomp_data->pressure;
+ var4 = (((var4 * INT64_C(2147483648)) - var2) * 3125) / var1;
+ var1 = (((int64_t)calib_data->dig_P9) * (var4 / 8192) * (var4 / 8192)) / 33554432;
+ var2 = (((int64_t)calib_data->dig_P8) * var4) / 524288;
+ var4 = ((var4 + var1 + var2) / 256) + (((int64_t)calib_data->dig_P7) * 16);
+ pressure = (uint32_t)(((var4 / 2) * 100) / 128);
+ if (pressure < pressure_min)
+ {
+ pressure = pressure_min;
+ }
+ else if (pressure > pressure_max)
+ {
+ pressure = pressure_max;
+ }
+ }
+ else
+ {
+ pressure = pressure_min;
+ }
+
+ return pressure;
}
#else
+
/*!
* @brief This internal API is used to compensate the raw pressure data and
* return the compensated pressure data in integer data type.
*/
static uint32_t compensate_pressure(const struct bme280_uncomp_data *uncomp_data,
- const struct bme280_calib_data *calib_data)
+ const struct bme280_calib_data *calib_data)
{
- int32_t var1;
- int32_t var2;
- int32_t var3;
- int32_t var4;
- uint32_t var5;
- uint32_t pressure;
- uint32_t pressure_min = 30000;
- uint32_t pressure_max = 110000;
-
- var1 = (((int32_t)calib_data->t_fine) / 2) - (int32_t)64000;
- var2 = (((var1 / 4) * (var1 / 4)) / 2048) * ((int32_t)calib_data->dig_P6);
- var2 = var2 + ((var1 * ((int32_t)calib_data->dig_P5)) * 2);
- var2 = (var2 / 4) + (((int32_t)calib_data->dig_P4) * 65536);
- var3 = (calib_data->dig_P3 * (((var1 / 4) * (var1 / 4)) / 8192)) / 8;
- var4 = (((int32_t)calib_data->dig_P2) * var1) / 2;
- var1 = (var3 + var4) / 262144;
- var1 = (((32768 + var1)) * ((int32_t)calib_data->dig_P1)) / 32768;
- /* avoid exception caused by division by zero */
- if (var1) {
- var5 = (uint32_t)((uint32_t)1048576) - uncomp_data->pressure;
- pressure = ((uint32_t)(var5 - (uint32_t)(var2 / 4096))) * 3125;
- if (pressure < 0x80000000)
- pressure = (pressure << 1) / ((uint32_t)var1);
- else
- pressure = (pressure / (uint32_t)var1) * 2;
-
- var1 = (((int32_t)calib_data->dig_P9) * ((int32_t)(((pressure / 8) * (pressure / 8)) / 8192))) / 4096;
- var2 = (((int32_t)(pressure / 4)) * ((int32_t)calib_data->dig_P8)) / 8192;
- pressure = (uint32_t)((int32_t)pressure + ((var1 + var2 + calib_data->dig_P7) / 16));
-
- if (pressure < pressure_min)
- pressure = pressure_min;
- else if (pressure > pressure_max)
- pressure = pressure_max;
- } else {
- pressure = pressure_min;
- }
-
- return pressure;
+ int32_t var1;
+ int32_t var2;
+ int32_t var3;
+ int32_t var4;
+ uint32_t var5;
+ uint32_t pressure;
+ uint32_t pressure_min = 30000;
+ uint32_t pressure_max = 110000;
+
+ var1 = (((int32_t)calib_data->t_fine) / 2) - (int32_t)64000;
+ var2 = (((var1 / 4) * (var1 / 4)) / 2048) * ((int32_t)calib_data->dig_P6);
+ var2 = var2 + ((var1 * ((int32_t)calib_data->dig_P5)) * 2);
+ var2 = (var2 / 4) + (((int32_t)calib_data->dig_P4) * 65536);
+ var3 = (calib_data->dig_P3 * (((var1 / 4) * (var1 / 4)) / 8192)) / 8;
+ var4 = (((int32_t)calib_data->dig_P2) * var1) / 2;
+ var1 = (var3 + var4) / 262144;
+ var1 = (((32768 + var1)) * ((int32_t)calib_data->dig_P1)) / 32768;
+
+ /* avoid exception caused by division by zero */
+ if (var1)
+ {
+ var5 = (uint32_t)((uint32_t)1048576) - uncomp_data->pressure;
+ pressure = ((uint32_t)(var5 - (uint32_t)(var2 / 4096))) * 3125;
+ if (pressure < 0x80000000)
+ {
+ pressure = (pressure << 1) / ((uint32_t)var1);
+ }
+ else
+ {
+ pressure = (pressure / (uint32_t)var1) * 2;
+ }
+ var1 = (((int32_t)calib_data->dig_P9) * ((int32_t)(((pressure / 8) * (pressure / 8)) / 8192))) / 4096;
+ var2 = (((int32_t)(pressure / 4)) * ((int32_t)calib_data->dig_P8)) / 8192;
+ pressure = (uint32_t)((int32_t)pressure + ((var1 + var2 + calib_data->dig_P7) / 16));
+ if (pressure < pressure_min)
+ {
+ pressure = pressure_min;
+ }
+ else if (pressure > pressure_max)
+ {
+ pressure = pressure_max;
+ }
+ }
+ else
+ {
+ pressure = pressure_min;
+ }
+
+ return pressure;
}
#endif
* return the compensated humidity data in integer data type.
*/
static uint32_t compensate_humidity(const struct bme280_uncomp_data *uncomp_data,
- const struct bme280_calib_data *calib_data)
+ const struct bme280_calib_data *calib_data)
{
- int32_t var1;
- int32_t var2;
- int32_t var3;
- int32_t var4;
- int32_t var5;
- uint32_t humidity;
- uint32_t humidity_max = 102400;
-
- var1 = calib_data->t_fine - ((int32_t)76800);
- var2 = (int32_t)(uncomp_data->humidity * 16384);
- var3 = (int32_t)(((int32_t)calib_data->dig_H4) * 1048576);
- var4 = ((int32_t)calib_data->dig_H5) * var1;
- var5 = (((var2 - var3) - var4) + (int32_t)16384) / 32768;
- var2 = (var1 * ((int32_t)calib_data->dig_H6)) / 1024;
- var3 = (var1 * ((int32_t)calib_data->dig_H3)) / 2048;
- var4 = ((var2 * (var3 + (int32_t)32768)) / 1024) + (int32_t)2097152;
- var2 = ((var4 * ((int32_t)calib_data->dig_H2)) + 8192) / 16384;
- var3 = var5 * var2;
- var4 = ((var3 / 32768) * (var3 / 32768)) / 128;
- var5 = var3 - ((var4 * ((int32_t)calib_data->dig_H1)) / 16);
- var5 = (var5 < 0 ? 0 : var5);
- var5 = (var5 > 419430400 ? 419430400 : var5);
- humidity = (uint32_t)(var5 / 4096);
-
- if (humidity > humidity_max)
- humidity = humidity_max;
-
- return humidity;
+ int32_t var1;
+ int32_t var2;
+ int32_t var3;
+ int32_t var4;
+ int32_t var5;
+ uint32_t humidity;
+ uint32_t humidity_max = 102400;
+
+ var1 = calib_data->t_fine - ((int32_t)76800);
+ var2 = (int32_t)(uncomp_data->humidity * 16384);
+ var3 = (int32_t)(((int32_t)calib_data->dig_H4) * 1048576);
+ var4 = ((int32_t)calib_data->dig_H5) * var1;
+ var5 = (((var2 - var3) - var4) + (int32_t)16384) / 32768;
+ var2 = (var1 * ((int32_t)calib_data->dig_H6)) / 1024;
+ var3 = (var1 * ((int32_t)calib_data->dig_H3)) / 2048;
+ var4 = ((var2 * (var3 + (int32_t)32768)) / 1024) + (int32_t)2097152;
+ var2 = ((var4 * ((int32_t)calib_data->dig_H2)) + 8192) / 16384;
+ var3 = var5 * var2;
+ var4 = ((var3 / 32768) * (var3 / 32768)) / 128;
+ var5 = var3 - ((var4 * ((int32_t)calib_data->dig_H1)) / 16);
+ var5 = (var5 < 0 ? 0 : var5);
+ var5 = (var5 > 419430400 ? 419430400 : var5);
+ humidity = (uint32_t)(var5 / 4096);
+ if (humidity > humidity_max)
+ {
+ humidity = humidity_max;
+ }
+
+ return humidity;
}
#endif
*/
static int8_t get_calib_data(struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t reg_addr = BME280_TEMP_PRESS_CALIB_DATA_ADDR;
- /* Array to store calibration data */
- uint8_t calib_data[BME280_TEMP_PRESS_CALIB_DATA_LEN] = {0};
-
- /* Read the calibration data from the sensor */
- rslt = bme280_get_regs(reg_addr, calib_data, BME280_TEMP_PRESS_CALIB_DATA_LEN, dev);
-
- if (rslt == BME280_OK) {
- /* Parse temperature and pressure calibration data and store
- it in device structure */
- parse_temp_press_calib_data(calib_data, dev);
-
- reg_addr = BME280_HUMIDITY_CALIB_DATA_ADDR;
- /* Read the humidity calibration data from the sensor */
- rslt = bme280_get_regs(reg_addr, calib_data, BME280_HUMIDITY_CALIB_DATA_LEN, dev);
- if (rslt == BME280_OK) {
- /* Parse humidity calibration data and store it in
- device structure */
- parse_humidity_calib_data(calib_data, dev);
- }
- }
-
- return rslt;
+ int8_t rslt;
+ uint8_t reg_addr = BME280_TEMP_PRESS_CALIB_DATA_ADDR;
+
+ /* Array to store calibration data */
+ uint8_t calib_data[BME280_TEMP_PRESS_CALIB_DATA_LEN] = { 0 };
+
+ /* Read the calibration data from the sensor */
+ rslt = bme280_get_regs(reg_addr, calib_data, BME280_TEMP_PRESS_CALIB_DATA_LEN, dev);
+ if (rslt == BME280_OK)
+ {
+ /* Parse temperature and pressure calibration data and store
+ * it in device structure
+ */
+ parse_temp_press_calib_data(calib_data, dev);
+ reg_addr = BME280_HUMIDITY_CALIB_DATA_ADDR;
+
+ /* Read the humidity calibration data from the sensor */
+ rslt = bme280_get_regs(reg_addr, calib_data, BME280_HUMIDITY_CALIB_DATA_LEN, dev);
+ if (rslt == BME280_OK)
+ {
+ /* Parse humidity calibration data and store it in
+ * device structure
+ */
+ parse_humidity_calib_data(calib_data, dev);
+ }
+ }
+
+ return rslt;
}
/*!
*/
static void interleave_reg_addr(const uint8_t *reg_addr, uint8_t *temp_buff, const uint8_t *reg_data, uint8_t len)
{
- uint8_t index;
+ uint8_t index;
- for (index = 1; index < len; index++) {
- temp_buff[(index * 2) - 1] = reg_addr[index];
- temp_buff[index * 2] = reg_data[index];
- }
+ for (index = 1; index < len; index++)
+ {
+ temp_buff[(index * 2) - 1] = reg_addr[index];
+ temp_buff[index * 2] = reg_data[index];
+ }
}
/*!
*/
static void parse_temp_press_calib_data(const uint8_t *reg_data, struct bme280_dev *dev)
{
- struct bme280_calib_data *calib_data = &dev->calib_data;
-
- calib_data->dig_T1 = BME280_CONCAT_BYTES(reg_data[1], reg_data[0]);
- calib_data->dig_T2 = (int16_t)BME280_CONCAT_BYTES(reg_data[3], reg_data[2]);
- calib_data->dig_T3 = (int16_t)BME280_CONCAT_BYTES(reg_data[5], reg_data[4]);
- calib_data->dig_P1 = BME280_CONCAT_BYTES(reg_data[7], reg_data[6]);
- calib_data->dig_P2 = (int16_t)BME280_CONCAT_BYTES(reg_data[9], reg_data[8]);
- calib_data->dig_P3 = (int16_t)BME280_CONCAT_BYTES(reg_data[11], reg_data[10]);
- calib_data->dig_P4 = (int16_t)BME280_CONCAT_BYTES(reg_data[13], reg_data[12]);
- calib_data->dig_P5 = (int16_t)BME280_CONCAT_BYTES(reg_data[15], reg_data[14]);
- calib_data->dig_P6 = (int16_t)BME280_CONCAT_BYTES(reg_data[17], reg_data[16]);
- calib_data->dig_P7 = (int16_t)BME280_CONCAT_BYTES(reg_data[19], reg_data[18]);
- calib_data->dig_P8 = (int16_t)BME280_CONCAT_BYTES(reg_data[21], reg_data[20]);
- calib_data->dig_P9 = (int16_t)BME280_CONCAT_BYTES(reg_data[23], reg_data[22]);
- calib_data->dig_H1 = reg_data[25];
-
+ struct bme280_calib_data *calib_data = &dev->calib_data;
+
+ calib_data->dig_T1 = BME280_CONCAT_BYTES(reg_data[1], reg_data[0]);
+ calib_data->dig_T2 = (int16_t)BME280_CONCAT_BYTES(reg_data[3], reg_data[2]);
+ calib_data->dig_T3 = (int16_t)BME280_CONCAT_BYTES(reg_data[5], reg_data[4]);
+ calib_data->dig_P1 = BME280_CONCAT_BYTES(reg_data[7], reg_data[6]);
+ calib_data->dig_P2 = (int16_t)BME280_CONCAT_BYTES(reg_data[9], reg_data[8]);
+ calib_data->dig_P3 = (int16_t)BME280_CONCAT_BYTES(reg_data[11], reg_data[10]);
+ calib_data->dig_P4 = (int16_t)BME280_CONCAT_BYTES(reg_data[13], reg_data[12]);
+ calib_data->dig_P5 = (int16_t)BME280_CONCAT_BYTES(reg_data[15], reg_data[14]);
+ calib_data->dig_P6 = (int16_t)BME280_CONCAT_BYTES(reg_data[17], reg_data[16]);
+ calib_data->dig_P7 = (int16_t)BME280_CONCAT_BYTES(reg_data[19], reg_data[18]);
+ calib_data->dig_P8 = (int16_t)BME280_CONCAT_BYTES(reg_data[21], reg_data[20]);
+ calib_data->dig_P9 = (int16_t)BME280_CONCAT_BYTES(reg_data[23], reg_data[22]);
+ calib_data->dig_H1 = reg_data[25];
}
/*!
*/
static void parse_humidity_calib_data(const uint8_t *reg_data, struct bme280_dev *dev)
{
- struct bme280_calib_data *calib_data = &dev->calib_data;
- int16_t dig_H4_lsb;
- int16_t dig_H4_msb;
- int16_t dig_H5_lsb;
- int16_t dig_H5_msb;
-
- calib_data->dig_H2 = (int16_t)BME280_CONCAT_BYTES(reg_data[1], reg_data[0]);
- calib_data->dig_H3 = reg_data[2];
-
- dig_H4_msb = (int16_t)(int8_t)reg_data[3] * 16;
- dig_H4_lsb = (int16_t)(reg_data[4] & 0x0F);
- calib_data->dig_H4 = dig_H4_msb | dig_H4_lsb;
-
- dig_H5_msb = (int16_t)(int8_t)reg_data[5] * 16;
- dig_H5_lsb = (int16_t)(reg_data[4] >> 4);
- calib_data->dig_H5 = dig_H5_msb | dig_H5_lsb;
- calib_data->dig_H6 = (int8_t)reg_data[6];
+ struct bme280_calib_data *calib_data = &dev->calib_data;
+ int16_t dig_H4_lsb;
+ int16_t dig_H4_msb;
+ int16_t dig_H5_lsb;
+ int16_t dig_H5_msb;
+
+ calib_data->dig_H2 = (int16_t)BME280_CONCAT_BYTES(reg_data[1], reg_data[0]);
+ calib_data->dig_H3 = reg_data[2];
+ dig_H4_msb = (int16_t)(int8_t)reg_data[3] * 16;
+ dig_H4_lsb = (int16_t)(reg_data[4] & 0x0F);
+ calib_data->dig_H4 = dig_H4_msb | dig_H4_lsb;
+ dig_H5_msb = (int16_t)(int8_t)reg_data[5] * 16;
+ dig_H5_lsb = (int16_t)(reg_data[4] >> 4);
+ calib_data->dig_H5 = dig_H5_msb | dig_H5_lsb;
+ calib_data->dig_H6 = (int8_t)reg_data[6];
}
/*!
*/
static uint8_t are_settings_changed(uint8_t sub_settings, uint8_t desired_settings)
{
- uint8_t settings_changed = FALSE;
-
- if (sub_settings & desired_settings) {
- /* User wants to modify this particular settings */
- settings_changed = TRUE;
- } else {
- /* User don't want to modify this particular settings */
- settings_changed = FALSE;
- }
-
- return settings_changed;
+ uint8_t settings_changed = FALSE;
+
+ if (sub_settings & desired_settings)
+ {
+ /* User wants to modify this particular settings */
+ settings_changed = TRUE;
+ }
+ else
+ {
+ /* User don't want to modify this particular settings */
+ settings_changed = FALSE;
+ }
+
+ return settings_changed;
}
/*!
*/
static int8_t null_ptr_check(const struct bme280_dev *dev)
{
- int8_t rslt;
-
- if ((dev == NULL) || (dev->read == NULL) || (dev->write == NULL) || (dev->delay_ms == NULL)) {
- /* Device structure pointer is not valid */
- rslt = BME280_E_NULL_PTR;
- } else {
- /* Device structure is fine */
- rslt = BME280_OK;
- }
-
- return rslt;
+ int8_t rslt;
+
+ if ((dev == NULL) || (dev->read == NULL) || (dev->write == NULL) || (dev->delay_ms == NULL))
+ {
+ /* Device structure pointer is not valid */
+ rslt = BME280_E_NULL_PTR;
+ }
+ else
+ {
+ /* Device structure is fine */
+ rslt = BME280_OK;
+ }
+
+ return rslt;
}
/**
- * Copyright (C) 2016 - 2017 Bosch Sensortec GmbH
+ * Copyright (C) 2018 - 2019 Bosch Sensortec GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* No license is granted by implication or otherwise under any patent or
* patent rights of the copyright holder.
*
- * @file bme280_defs.h
- * @date 14 Feb 2018
- * @version 3.3.4
+ * @file bme280_defs.h
+ * @date 08 Mar 2019
+ * @version 3.3.6
* @brief
*
*/
/*! @file bme280_defs.h
- @brief Sensor driver for BME280 sensor */
+ * @brief Sensor driver for BME280 sensor
+ */
+
/*!
* @defgroup BME280 SENSOR API
* @brief
- * @{*/
+ */
#ifndef BME280_DEFS_H_
#define BME280_DEFS_H_
#endif
/********************************************************/
-/*! @name Common macros */
+/*! @name Common macros */
/********************************************************/
#if !defined(UINT8_C) && !defined(INT8_C)
-#define INT8_C(x) S8_C(x)
-#define UINT8_C(x) U8_C(x)
+#define INT8_C(x) S8_C(x)
+#define UINT8_C(x) U8_C(x)
#endif
#if !defined(UINT16_C) && !defined(INT16_C)
-#define INT16_C(x) S16_C(x)
-#define UINT16_C(x) U16_C(x)
+#define INT16_C(x) S16_C(x)
+#define UINT16_C(x) U16_C(x)
#endif
#if !defined(INT32_C) && !defined(UINT32_C)
-#define INT32_C(x) S32_C(x)
-#define UINT32_C(x) U32_C(x)
+#define INT32_C(x) S32_C(x)
+#define UINT32_C(x) U32_C(x)
#endif
#if !defined(INT64_C) && !defined(UINT64_C)
-#define INT64_C(x) S64_C(x)
-#define UINT64_C(x) U64_C(x)
+#define INT64_C(x) S64_C(x)
+#define UINT64_C(x) U64_C(x)
#endif
/**@}*/
-
/**\name C standard macros */
#ifndef NULL
#ifdef __cplusplus
-#define NULL 0
+#define NULL 0
#else
-#define NULL ((void *) 0)
+#define NULL ((void *) 0)
#endif
#endif
+
/********************************************************/
#ifndef BME280_FLOAT_ENABLE
+
/* #define BME280_FLOAT_ENABLE */
#endif
#endif
#ifndef TRUE
-#define TRUE UINT8_C(1)
+#define TRUE UINT8_C(1)
#endif
#ifndef FALSE
-#define FALSE UINT8_C(0)
+#define FALSE UINT8_C(0)
#endif
/**\name I2C addresses */
-#define BME280_I2C_ADDR_PRIM UINT8_C(0x76)
-#define BME280_I2C_ADDR_SEC UINT8_C(0x77)
+#define BME280_I2C_ADDR_PRIM UINT8_C(0x76)
+#define BME280_I2C_ADDR_SEC UINT8_C(0x77)
/**\name BME280 chip identifier */
-#define BME280_CHIP_ID UINT8_C(0x60)
+#define BME280_CHIP_ID UINT8_C(0x60)
/**\name Register Address */
-#define BME280_CHIP_ID_ADDR UINT8_C(0xD0)
-#define BME280_RESET_ADDR UINT8_C(0xE0)
-#define BME280_TEMP_PRESS_CALIB_DATA_ADDR UINT8_C(0x88)
-#define BME280_HUMIDITY_CALIB_DATA_ADDR UINT8_C(0xE1)
-#define BME280_PWR_CTRL_ADDR UINT8_C(0xF4)
-#define BME280_CTRL_HUM_ADDR UINT8_C(0xF2)
-#define BME280_CTRL_MEAS_ADDR UINT8_C(0xF4)
-#define BME280_CONFIG_ADDR UINT8_C(0xF5)
-#define BME280_DATA_ADDR UINT8_C(0xF7)
+#define BME280_CHIP_ID_ADDR UINT8_C(0xD0)
+#define BME280_RESET_ADDR UINT8_C(0xE0)
+#define BME280_TEMP_PRESS_CALIB_DATA_ADDR UINT8_C(0x88)
+#define BME280_HUMIDITY_CALIB_DATA_ADDR UINT8_C(0xE1)
+#define BME280_PWR_CTRL_ADDR UINT8_C(0xF4)
+#define BME280_CTRL_HUM_ADDR UINT8_C(0xF2)
+#define BME280_CTRL_MEAS_ADDR UINT8_C(0xF4)
+#define BME280_CONFIG_ADDR UINT8_C(0xF5)
+#define BME280_DATA_ADDR UINT8_C(0xF7)
/**\name API success code */
-#define BME280_OK INT8_C(0)
+#define BME280_OK INT8_C(0)
/**\name API error codes */
-#define BME280_E_NULL_PTR INT8_C(-1)
-#define BME280_E_DEV_NOT_FOUND INT8_C(-2)
-#define BME280_E_INVALID_LEN INT8_C(-3)
-#define BME280_E_COMM_FAIL INT8_C(-4)
-#define BME280_E_SLEEP_MODE_FAIL INT8_C(-5)
+#define BME280_E_NULL_PTR INT8_C(-1)
+#define BME280_E_DEV_NOT_FOUND INT8_C(-2)
+#define BME280_E_INVALID_LEN INT8_C(-3)
+#define BME280_E_COMM_FAIL INT8_C(-4)
+#define BME280_E_SLEEP_MODE_FAIL INT8_C(-5)
/**\name API warning codes */
-#define BME280_W_INVALID_OSR_MACRO INT8_C(1)
+#define BME280_W_INVALID_OSR_MACRO INT8_C(1)
/**\name Macros related to size */
-#define BME280_TEMP_PRESS_CALIB_DATA_LEN UINT8_C(26)
-#define BME280_HUMIDITY_CALIB_DATA_LEN UINT8_C(7)
-#define BME280_P_T_H_DATA_LEN UINT8_C(8)
+#define BME280_TEMP_PRESS_CALIB_DATA_LEN UINT8_C(26)
+#define BME280_HUMIDITY_CALIB_DATA_LEN UINT8_C(7)
+#define BME280_P_T_H_DATA_LEN UINT8_C(8)
/**\name Sensor power modes */
-#define BME280_SLEEP_MODE UINT8_C(0x00)
-#define BME280_FORCED_MODE UINT8_C(0x01)
-#define BME280_NORMAL_MODE UINT8_C(0x03)
+#define BME280_SLEEP_MODE UINT8_C(0x00)
+#define BME280_FORCED_MODE UINT8_C(0x01)
+#define BME280_NORMAL_MODE UINT8_C(0x03)
/**\name Macro to combine two 8 bit data's to form a 16 bit data */
-#define BME280_CONCAT_BYTES(msb, lsb) (((uint16_t)msb << 8) | (uint16_t)lsb)
+#define BME280_CONCAT_BYTES(msb, lsb) (((uint16_t)msb << 8) | (uint16_t)lsb)
#define BME280_SET_BITS(reg_data, bitname, data) \
- ((reg_data & ~(bitname##_MSK)) | \
- ((data << bitname##_POS) & bitname##_MSK))
+ ((reg_data & ~(bitname##_MSK)) | \
+ ((data << bitname##_POS) & bitname##_MSK))
#define BME280_SET_BITS_POS_0(reg_data, bitname, data) \
- ((reg_data & ~(bitname##_MSK)) | \
- (data & bitname##_MSK))
+ ((reg_data & ~(bitname##_MSK)) | \
+ (data & bitname##_MSK))
-#define BME280_GET_BITS(reg_data, bitname) ((reg_data & (bitname##_MSK)) >> \
- (bitname##_POS))
-#define BME280_GET_BITS_POS_0(reg_data, bitname) (reg_data & (bitname##_MSK))
+#define BME280_GET_BITS(reg_data, bitname) ((reg_data & (bitname##_MSK)) >> \
+ (bitname##_POS))
+#define BME280_GET_BITS_POS_0(reg_data, bitname) (reg_data & (bitname##_MSK))
/**\name Macros for bit masking */
-#define BME280_SENSOR_MODE_MSK UINT8_C(0x03)
-#define BME280_SENSOR_MODE_POS UINT8_C(0x00)
+#define BME280_SENSOR_MODE_MSK UINT8_C(0x03)
+#define BME280_SENSOR_MODE_POS UINT8_C(0x00)
-#define BME280_CTRL_HUM_MSK UINT8_C(0x07)
-#define BME280_CTRL_HUM_POS UINT8_C(0x00)
+#define BME280_CTRL_HUM_MSK UINT8_C(0x07)
+#define BME280_CTRL_HUM_POS UINT8_C(0x00)
-#define BME280_CTRL_PRESS_MSK UINT8_C(0x1C)
-#define BME280_CTRL_PRESS_POS UINT8_C(0x02)
+#define BME280_CTRL_PRESS_MSK UINT8_C(0x1C)
+#define BME280_CTRL_PRESS_POS UINT8_C(0x02)
-#define BME280_CTRL_TEMP_MSK UINT8_C(0xE0)
-#define BME280_CTRL_TEMP_POS UINT8_C(0x05)
+#define BME280_CTRL_TEMP_MSK UINT8_C(0xE0)
+#define BME280_CTRL_TEMP_POS UINT8_C(0x05)
-#define BME280_FILTER_MSK UINT8_C(0x1C)
-#define BME280_FILTER_POS UINT8_C(0x02)
+#define BME280_FILTER_MSK UINT8_C(0x1C)
+#define BME280_FILTER_POS UINT8_C(0x02)
-#define BME280_STANDBY_MSK UINT8_C(0xE0)
-#define BME280_STANDBY_POS UINT8_C(0x05)
+#define BME280_STANDBY_MSK UINT8_C(0xE0)
+#define BME280_STANDBY_POS UINT8_C(0x05)
/**\name Sensor component selection macros
- These values are internal for API implementation. Don't relate this to
- data sheet.*/
-#define BME280_PRESS UINT8_C(1)
-#define BME280_TEMP UINT8_C(1 << 1)
-#define BME280_HUM UINT8_C(1 << 2)
-#define BME280_ALL UINT8_C(0x07)
+ * These values are internal for API implementation. Don't relate this to
+ * data sheet.
+ */
+#define BME280_PRESS UINT8_C(1)
+#define BME280_TEMP UINT8_C(1 << 1)
+#define BME280_HUM UINT8_C(1 << 2)
+#define BME280_ALL UINT8_C(0x07)
/**\name Settings selection macros */
-#define BME280_OSR_PRESS_SEL UINT8_C(1)
-#define BME280_OSR_TEMP_SEL UINT8_C(1 << 1)
-#define BME280_OSR_HUM_SEL UINT8_C(1 << 2)
-#define BME280_FILTER_SEL UINT8_C(1 << 3)
-#define BME280_STANDBY_SEL UINT8_C(1 << 4)
-#define BME280_ALL_SETTINGS_SEL UINT8_C(0x1F)
+#define BME280_OSR_PRESS_SEL UINT8_C(1)
+#define BME280_OSR_TEMP_SEL UINT8_C(1 << 1)
+#define BME280_OSR_HUM_SEL UINT8_C(1 << 2)
+#define BME280_FILTER_SEL UINT8_C(1 << 3)
+#define BME280_STANDBY_SEL UINT8_C(1 << 4)
+#define BME280_ALL_SETTINGS_SEL UINT8_C(0x1F)
/**\name Oversampling macros */
-#define BME280_NO_OVERSAMPLING UINT8_C(0x00)
-#define BME280_OVERSAMPLING_1X UINT8_C(0x01)
-#define BME280_OVERSAMPLING_2X UINT8_C(0x02)
-#define BME280_OVERSAMPLING_4X UINT8_C(0x03)
-#define BME280_OVERSAMPLING_8X UINT8_C(0x04)
-#define BME280_OVERSAMPLING_16X UINT8_C(0x05)
+#define BME280_NO_OVERSAMPLING UINT8_C(0x00)
+#define BME280_OVERSAMPLING_1X UINT8_C(0x01)
+#define BME280_OVERSAMPLING_2X UINT8_C(0x02)
+#define BME280_OVERSAMPLING_4X UINT8_C(0x03)
+#define BME280_OVERSAMPLING_8X UINT8_C(0x04)
+#define BME280_OVERSAMPLING_16X UINT8_C(0x05)
/**\name Standby duration selection macros */
-#define BME280_STANDBY_TIME_1_MS (0x00)
-#define BME280_STANDBY_TIME_62_5_MS (0x01)
-#define BME280_STANDBY_TIME_125_MS (0x02)
-#define BME280_STANDBY_TIME_250_MS (0x03)
-#define BME280_STANDBY_TIME_500_MS (0x04)
-#define BME280_STANDBY_TIME_1000_MS (0x05)
-#define BME280_STANDBY_TIME_10_MS (0x06)
-#define BME280_STANDBY_TIME_20_MS (0x07)
+#define BME280_STANDBY_TIME_0_5_MS (0x00)
+#define BME280_STANDBY_TIME_62_5_MS (0x01)
+#define BME280_STANDBY_TIME_125_MS (0x02)
+#define BME280_STANDBY_TIME_250_MS (0x03)
+#define BME280_STANDBY_TIME_500_MS (0x04)
+#define BME280_STANDBY_TIME_1000_MS (0x05)
+#define BME280_STANDBY_TIME_10_MS (0x06)
+#define BME280_STANDBY_TIME_20_MS (0x07)
/**\name Filter coefficient selection macros */
-#define BME280_FILTER_COEFF_OFF (0x00)
-#define BME280_FILTER_COEFF_2 (0x01)
-#define BME280_FILTER_COEFF_4 (0x02)
-#define BME280_FILTER_COEFF_8 (0x03)
-#define BME280_FILTER_COEFF_16 (0x04)
+#define BME280_FILTER_COEFF_OFF (0x00)
+#define BME280_FILTER_COEFF_2 (0x01)
+#define BME280_FILTER_COEFF_4 (0x02)
+#define BME280_FILTER_COEFF_8 (0x03)
+#define BME280_FILTER_COEFF_16 (0x04)
/*!
* @brief Interface selection Enums
*/
enum bme280_intf {
- /*! SPI interface */
- BME280_SPI_INTF,
- /*! I2C interface */
- BME280_I2C_INTF
+ /*! SPI interface */
+ BME280_SPI_INTF,
+
+ /*! I2C interface */
+ BME280_I2C_INTF
};
/*!
* @brief Type definitions
*/
-typedef int8_t (*bme280_com_fptr_t)(uint8_t dev_id, uint8_t reg_addr,
- uint8_t *data, uint16_t len);
-
+typedef int8_t (*bme280_com_fptr_t)(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len);
typedef void (*bme280_delay_fptr_t)(uint32_t period);
/*!
* @brief Calibration data
*/
-struct bme280_calib_data {
- /**
- * @ Trim Variables
- */
-/**@{*/
- uint16_t dig_T1;
- int16_t dig_T2;
- int16_t dig_T3;
- uint16_t dig_P1;
- int16_t dig_P2;
- int16_t dig_P3;
- int16_t dig_P4;
- int16_t dig_P5;
- int16_t dig_P6;
- int16_t dig_P7;
- int16_t dig_P8;
- int16_t dig_P9;
- uint8_t dig_H1;
- int16_t dig_H2;
- uint8_t dig_H3;
- int16_t dig_H4;
- int16_t dig_H5;
- int8_t dig_H6;
- int32_t t_fine;
-/**@}*/
+struct bme280_calib_data
+{
+ /**
+ * @ Trim Variables
+ */
+
+ /**@{*/
+ uint16_t dig_T1;
+ int16_t dig_T2;
+ int16_t dig_T3;
+ uint16_t dig_P1;
+ int16_t dig_P2;
+ int16_t dig_P3;
+ int16_t dig_P4;
+ int16_t dig_P5;
+ int16_t dig_P6;
+ int16_t dig_P7;
+ int16_t dig_P8;
+ int16_t dig_P9;
+ uint8_t dig_H1;
+ int16_t dig_H2;
+ uint8_t dig_H3;
+ int16_t dig_H4;
+ int16_t dig_H5;
+ int8_t dig_H6;
+ int32_t t_fine;
+
+ /**@}*/
};
/*!
* humidity data
*/
#ifdef BME280_FLOAT_ENABLE
-struct bme280_data {
- /*! Compensated pressure */
- double pressure;
- /*! Compensated temperature */
- double temperature;
- /*! Compensated humidity */
- double humidity;
+struct bme280_data
+{
+ /*! Compensated pressure */
+ double pressure;
+
+ /*! Compensated temperature */
+ double temperature;
+
+ /*! Compensated humidity */
+ double humidity;
};
#else
-struct bme280_data {
- /*! Compensated pressure */
- uint32_t pressure;
- /*! Compensated temperature */
- int32_t temperature;
- /*! Compensated humidity */
- uint32_t humidity;
+struct bme280_data
+{
+ /*! Compensated pressure */
+ uint32_t pressure;
+
+ /*! Compensated temperature */
+ int32_t temperature;
+
+ /*! Compensated humidity */
+ uint32_t humidity;
};
#endif /* BME280_USE_FLOATING_POINT */
* @brief bme280 sensor structure which comprises of uncompensated temperature,
* pressure and humidity data
*/
-struct bme280_uncomp_data {
- /*! un-compensated pressure */
- uint32_t pressure;
- /*! un-compensated temperature */
- uint32_t temperature;
- /*! un-compensated humidity */
- uint32_t humidity;
+struct bme280_uncomp_data
+{
+ /*! un-compensated pressure */
+ uint32_t pressure;
+
+ /*! un-compensated temperature */
+ uint32_t temperature;
+
+ /*! un-compensated humidity */
+ uint32_t humidity;
};
/*!
* @brief bme280 sensor settings structure which comprises of mode,
* oversampling and filter settings.
*/
-struct bme280_settings {
- /*! pressure oversampling */
- uint8_t osr_p;
- /*! temperature oversampling */
- uint8_t osr_t;
- /*! humidity oversampling */
- uint8_t osr_h;
- /*! filter coefficient */
- uint8_t filter;
- /*! standby time */
- uint8_t standby_time;
+struct bme280_settings
+{
+ /*! pressure oversampling */
+ uint8_t osr_p;
+
+ /*! temperature oversampling */
+ uint8_t osr_t;
+
+ /*! humidity oversampling */
+ uint8_t osr_h;
+
+ /*! filter coefficient */
+ uint8_t filter;
+
+ /*! standby time */
+ uint8_t standby_time;
};
/*!
* @brief bme280 device structure
*/
-struct bme280_dev {
- /*! Chip Id */
- uint8_t chip_id;
- /*! Device Id */
- uint8_t dev_id;
- /*! SPI/I2C interface */
- enum bme280_intf intf;
- /*! Read function pointer */
- bme280_com_fptr_t read;
- /*! Write function pointer */
- bme280_com_fptr_t write;
- /*! Delay function pointer */
- bme280_delay_fptr_t delay_ms;
- /*! Trim data */
- struct bme280_calib_data calib_data;
- /*! Sensor settings */
- struct bme280_settings settings;
+struct bme280_dev
+{
+ /*! Chip Id */
+ uint8_t chip_id;
+
+ /*! Device Id */
+ uint8_t dev_id;
+
+ /*! SPI/I2C interface */
+ enum bme280_intf intf;
+
+ /*! Read function pointer */
+ bme280_com_fptr_t read;
+
+ /*! Write function pointer */
+ bme280_com_fptr_t write;
+
+ /*! Delay function pointer */
+ bme280_delay_fptr_t delay_ms;
+
+ /*! Trim data */
+ struct bme280_calib_data calib_data;
+
+ /*! Sensor settings */
+ struct bme280_settings settings;
};
#endif /* BME280_DEFS_H_ */