bmp280.h File Reference

Sensor driver for BMP280 sensor. More...

#include "peripherals/bmp280_regs.h"
#include "mcu_periph/i2c.h"
#include "mcu_periph/spi.h"

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Data Structures
struct	bmp280_i2c_t
struct	bmp280_spi_t
struct	bmp280_reg_calib_data_t
struct	bmp280_t
union	bmp280_t.__unnamed315__

Enumerations
enum	bmp280_bus_t { BMP280_SPI , BMP280_I2C }
enum	bmp_device_t { BMP_UNKOWN , BMP_280 }
enum	bmp280_status_t {   BMP280_STATUS_UNINIT , BMP280_STATUS_IDLE , BMP280_STATUS_GET_CALIB , BMP280_STATUS_CONFIGURE ,   BMP280_STATUS_READ_STATUS_REG , BMP280_STATUS_READ_DATA_REGS }

Functions
void	bmp280_read_eeprom_calib (struct bmp280_t *bmp)
void	bmp280_init (struct bmp280_t *bmp)
	Initialize the bmp280 sensor instance. More...
void	bmp280_periodic (struct bmp280_t *bmp)
	Should be called periodically to request sensor readings. More...
void	bmp280_event (struct bmp280_t *bmp)
	Should be called in the event thread. More...

Detailed Description

Sensor driver for BMP280 sensor.

Definition in file bmp280.h.

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Data Structure Documentation

bmp280_i2c_t

struct bmp280_i2c_t

Definition at line 36 of file bmp280.h.

Collaboration diagram for bmp280_i2c_t:

Data Fields
struct i2c_periph *	p	Peripheral device for communication.
uint8_t	slave_addr	The I2C slave address on the bus.
struct i2c_transaction	trans	Transaction used during configuration and measurements.

bmp280_spi_t

struct bmp280_spi_t

Definition at line 42 of file bmp280.h.

Collaboration diagram for bmp280_spi_t:

Data Fields
struct spi_periph *	p	Peripheral device for communication.
uint8_t	rx_buf[50]
uint8_t	slave_idx	Slave index used for Slave Select.
struct spi_transaction	trans	Transaction used during configuration and measurements.
uint8_t	tx_buf[50]	Transmit buffer.

bmp280_reg_calib_data_t

struct bmp280_reg_calib_data_t

Definition at line 73 of file bmp280.h.

Data Fields
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
uint16_t	dig_t1
int16_t	dig_t2
int16_t	dig_t3
int64_t	t_fine

bmp280_t

struct bmp280_t

Definition at line 90 of file bmp280.h.

Collaboration diagram for bmp280_t:

Data Fields
union bmp280_t	__unnamed__
enum bmp280_bus_t	bus	The communication bus used to connect the device SPI/I2C.
struct bmp280_reg_calib_data_t	calib	calibration data
uint8_t	config_idx	The current configuration index.
volatile bool	data_available	data ready flag
enum bmp_device_t	device	The device type detected.
bool	initialized	config done flag
float	pressure	pressure in Pascal
uint32_t	raw_pressure	uncompensated pressure
uint32_t	raw_temperature	uncompensated temperature
uint8_t *	rx_buffer
uint16_t *	rx_length
enum bmp280_status_t	status	state machine status
float	temperature	temperature in deg Celcius
uint8_t *	tx_buffer

bmp280_t.__unnamed315__

union bmp280_t.__unnamed315__

Definition at line 101 of file bmp280.h.

Data Fields
struct bmp280_i2c_t	i2c	I2C specific configuration.
struct bmp280_spi_t	spi	SPI specific configuration.

Enumeration Type Documentation

bmp280_bus_t

enum bmp280_bus_t

Enumerator
BMP280_SPI
BMP280_I2C

Definition at line 52 of file bmp280.h.

bmp280_status_t

enum bmp280_status_t

Enumerator
BMP280_STATUS_UNINIT
BMP280_STATUS_IDLE
BMP280_STATUS_GET_CALIB
BMP280_STATUS_CONFIGURE
BMP280_STATUS_READ_STATUS_REG
BMP280_STATUS_READ_DATA_REGS

Definition at line 63 of file bmp280.h.

bmp_device_t

enum bmp_device_t

Enumerator
BMP_UNKOWN
BMP_280

Definition at line 57 of file bmp280.h.

Function Documentation

bmp280_event()

void bmp280_event

(

struct bmp280_t *

bmp

)

Should be called in the event thread.

• Configures the sensor and reads the responses
• Parse and request the sensor data

Parameters

bmp	The bmp280 instance

Definition at line 157 of file bmp280.c.

References bmp280_config(), BMP280_EOC_BIT, BMP280_I2C, BMP280_ID_NB, BMP280_NVRAM_COPY_BIT, BMP280_SPI, BMP280_STATUS_CONFIGURE, BMP280_STATUS_GET_CALIB, BMP280_STATUS_IDLE, BMP280_STATUS_READ_DATA_REGS, BMP280_STATUS_READ_STATUS_REG, BMP280_STATUS_UNINIT, BMP_280, bmp280_t::bus, compensate_pressure(), compensate_temperature(), bmp280_t::data_available, bmp280_t::device, I2CTransDone, I2CTransFailed, I2CTransSuccess, bmp280_t::initialized, parse_calib_data(), parse_sensor_data(), bmp280_t::rx_buffer, SPITransDone, SPITransFailed, SPITransSuccess, and bmp280_t::status.

Referenced by baro_bmp280_event().

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bmp280_init()

void bmp280_init

(

struct bmp280_t *

bmp

)

Initialize the bmp280 sensor instance.

Parameters

bmp	The structure containing the configuration of the bmp280 instance

Definition at line 48 of file bmp280.c.

References BMP280_SPI, BMP280_STATUS_UNINIT, I2CTransDone, SPICphaEdge2, SPICpolIdleHigh, SPIDiv16, SPIDss8bit, SPIMSBFirst, SPISelectUnselect, and SPITransDone.

Referenced by baro_bmp280_init().

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bmp280_periodic()

void bmp280_periodic

(

struct bmp280_t *

bmp

)

Should be called periodically to request sensor readings.

• First detects the sensor using WHO_AM_I reading
• Configures the sensor according the users requested configuration
• Requests a sensor reading

Parameters

bmp	The bmp280 instance

Definition at line 101 of file bmp280.c.

References BMP280_CALIB_DATA_LEN, BMP280_CALIB_LSB_DATA_ADDR, BMP280_CHIP_ID_REG_ADDR, bmp280_config(), BMP280_DATA_START_REG_ADDR, BMP280_I2C, BMP280_P_T_DATA_LEN, bmp280_register_read(), BMP280_SPI, BMP280_STATUS_CONFIGURE, BMP280_STATUS_GET_CALIB, BMP280_STATUS_IDLE, BMP280_STATUS_READ_DATA_REGS, BMP280_STATUS_READ_STATUS_REG, BMP280_STATUS_REG_ADDR, BMP280_STATUS_UNINIT, bmp280_t::bus, bmp280_t::data_available, I2CTransDone, bmp280_t::initialized, SPITransDone, and bmp280_t::status.

Referenced by baro_bmp280_periodic().

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bmp280_read_eeprom_calib()

void bmp280_read_eeprom_calib

(

struct bmp280_t *

bmp

)