bmp280_i2c.c File Reference

Sensor driver for BMP280 sensor via I2C. More...

#include "peripherals/bmp280_i2c.h"

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Functions
static void	parse_sensor_data (struct Bmp280_I2c *bmp)
	local function to extract raw data from i2c buffer and compute compensation with selected precision More...
static void	parse_calib_data (struct Bmp280_I2c *bmp)
	This internal API is used to parse the calibration data, compensates it and store it in device structure (float version) More...
static double	compensate_pressure (struct Bmp280_I2c *bmp)
	This internal API is used to compensate the raw pressure data and return the compensated pressure data in integer data type. More...
static double	compensate_temperature (struct Bmp280_I2c *bmp)
	This internal API is used to compensate the raw temperature data and return the compensated temperature data in float data type. More...
void	bmp280_i2c_init (struct Bmp280_I2c *bmp, struct i2c_periph *i2c_p, uint8_t addr)
void	bmp280_i2c_periodic (struct Bmp280_I2c *bmp)
void	bmp280_i2c_event (struct Bmp280_I2c *bmp)

Variables
int64_t	t_fine

Detailed Description

Sensor driver for BMP280 sensor via I2C.

Definition in file bmp280_i2c.c.

Function Documentation

bmp280_i2c_event()

void bmp280_i2c_event

(

struct Bmp280_I2c *

bmp

)

Definition at line 104 of file bmp280_i2c.c.

References BMP280_EOC_BIT, BMP280_NVRAM_COPY_BIT, BMP280_STATUS_CONFIGURE, BMP280_STATUS_GET_CALIB, BMP280_STATUS_READ_DATA_REGS, BMP280_STATUS_READ_STATUS_REG, BMP280_STATUS_UNINIT, i2c_transaction::buf, compensate_pressure(), compensate_temperature(), Bmp280_I2c::data_available, Bmp280_I2c::i2c_trans, I2CTransDone, I2CTransFailed, I2CTransSuccess, Bmp280_I2c::initialized, parse_calib_data(), parse_sensor_data(), i2c_transaction::status, and Bmp280_I2c::status.

Referenced by baro_bmp280_event().

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bmp280_i2c_init()

void bmp280_i2c_init	(	struct Bmp280_I2c *	bmp,
		struct i2c_periph *	i2c_p,
		uint8_t	addr
	)

Definition at line 41 of file bmp280_i2c.c.

References BMP280_STATUS_UNINIT, and I2CTransDone.

Referenced by baro_bmp280_init().

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bmp280_i2c_periodic()

void bmp280_i2c_periodic

(

struct Bmp280_I2c *

bmp

)

Definition at line 57 of file bmp280_i2c.c.

References BMP280_CALIB_DATA_LEN, BMP280_CALIB_LSB_DATA_ADDR, BMP280_CONFIG_LEN, BMP280_CONFIG_REG_ADDR, BMP280_CTRL_MEAS_REG_ADDR, BMP280_DATA_START_REG_ADDR, BMP280_IIR_FILTER_COEFF_2, BMP280_INACTIVITY_62_5_MS, BMP280_OVERSAMPLING_1X_T, BMP280_OVERSAMPLING_8X_P, BMP280_P_T_DATA_LEN, BMP280_POWER_NORMAL_MODE, BMP280_STATUS_CONFIGURE, BMP280_STATUS_GET_CALIB, BMP280_STATUS_READ_DATA_REGS, BMP280_STATUS_READ_STATUS_REG, BMP280_STATUS_REG_ADDR, BMP280_STATUS_UNINIT, i2c_transaction::buf, Bmp280_I2c::data_available, Bmp280_I2c::i2c_p, Bmp280_I2c::i2c_trans, i2c_transceive(), i2c_transmit(), I2CTransDone, Bmp280_I2c::initialized, i2c_transaction::slave_addr, i2c_transaction::status, and Bmp280_I2c::status.

Referenced by baro_bmp280_periodic().

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compensate_pressure()

static double compensate_pressure ( struct Bmp280_I2c *  bmp )

static

This internal API is used to compensate the raw pressure data and return the compensated pressure data in integer data type.

Definition at line 228 of file bmp280_i2c.c.

References Bmp280_I2c::calib, bmp280_reg_calib_data::dig_p1, bmp280_reg_calib_data::dig_p2, bmp280_reg_calib_data::dig_p3, bmp280_reg_calib_data::dig_p4, bmp280_reg_calib_data::dig_p5, bmp280_reg_calib_data::dig_p7, bmp280_reg_calib_data::dig_p8, bmp280_reg_calib_data::dig_p9, p, Bmp280_I2c::pressure, Bmp280_I2c::raw_pressure, and t_fine.

Referenced by bmp280_i2c_event().

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compensate_temperature()

static double compensate_temperature ( struct Bmp280_I2c *  bmp )

static

This internal API is used to compensate the raw temperature data and return the compensated temperature data in float data type.

Definition at line 205 of file bmp280_i2c.c.

References Bmp280_I2c::calib, bmp280_reg_calib_data::dig_t1, bmp280_reg_calib_data::dig_t2, bmp280_reg_calib_data::dig_t3, Bmp280_I2c::raw_temperature, t_fine, bmp280_reg_calib_data::t_fine, and Bmp280_I2c::temperature.

Referenced by bmp280_i2c_event().

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parse_calib_data()

static void parse_calib_data ( struct Bmp280_I2c *  bmp )

static

This internal API is used to parse the calibration data, compensates it and store it in device structure (float version)

Definition at line 180 of file bmp280_i2c.c.

References BMP280_CONCAT_BYTES, i2c_transaction::buf, Bmp280_I2c::calib, bmp280_reg_calib_data::dig_p1, bmp280_reg_calib_data::dig_p2, bmp280_reg_calib_data::dig_p3, bmp280_reg_calib_data::dig_p4, bmp280_reg_calib_data::dig_p5, bmp280_reg_calib_data::dig_p6, bmp280_reg_calib_data::dig_p7, bmp280_reg_calib_data::dig_p8, bmp280_reg_calib_data::dig_p9, bmp280_reg_calib_data::dig_t1, bmp280_reg_calib_data::dig_t2, bmp280_reg_calib_data::dig_t3, and Bmp280_I2c::i2c_trans.

Referenced by bmp280_i2c_event().

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parse_sensor_data()

static void parse_sensor_data ( struct Bmp280_I2c *  bmp )

static

local function to extract raw data from i2c buffer and compute compensation with selected precision

Definition at line 153 of file bmp280_i2c.c.

References i2c_transaction::buf, Bmp280_I2c::i2c_trans, Bmp280_I2c::raw_pressure, and Bmp280_I2c::raw_temperature.

Referenced by bmp280_i2c_event().

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Variable Documentation

t_fine

int64_t t_fine

Definition at line 38 of file bmp280_i2c.c.

Referenced by compensate_pressure(), and compensate_temperature().