bmp180.h

Device driver interface for the BMP180 sensor.

enum bmp180_oversampling_mode_t
BMP180_ULTRALOWPOWER = 0
BMP180_STANDARD
BMP180_HIGHRES
BMP180_ULTRAHIGHRES
enum @113
BMP180_OK = 0
everything was fine
BMP180_ERR_NODEV
did not detect BMP180
BMP180_ERR_NOCAL
error when reading calibration values
int bmp180_init(bmp180_t * dev, const bmp180_params_t * params)

Initialize the given BMP180 device.

Parameters

dev:Initialized device descriptor of BMP180 device
params:Initialization parameters

Return values

  • BMP180_OK on success
  • -BMP180_ERR_NODEV if not a BMP180 at given address
  • -BMP180_ERR_NOCAL if an error occured when reading calibration values
int16_t bmp180_read_temperature(const bmp180_t * dev)

Read temperature value from the given BMP180 device, returned in d°C.

Parameters

dev:Device descriptor of BMP180 device to read from

Return values

  • Temperature in d°C
uint32_t bmp180_read_pressure(const bmp180_t * dev)

Read pressure value from the given BMP180 device, returned in Pa.

Parameters

dev:Device descriptor of BMP180 device to read from

Return values

  • Pressure in Pa
int16_t bmp180_altitude(const bmp180_t * dev, uint32_t pressure_0)

Compute altitude, returned in m.

Parameters

dev:Device descriptor of BMP180 device to read from
pressure_0:The pressure at sea level in Pa

Return values

  • Altitude in m
uint32_t bmp180_sealevel_pressure(const bmp180_t * dev, int16_t altitude)

Compute pressure at sea level, returned in Pa.

Parameters

dev:Device descriptor of BMP180 device to read from
altitude:Altitude in m

Return values

  • Pressure at sea level in Pa
struct bmp180_calibration_t

Calibration struct for the BMP180 sensor.

int16_t ac1

ac1 coefficient

int16_t ac2

ac2 coefficient

int16_t ac3

ac3 coefficient

int16_t b1

b1 coefficient

int16_t b2

b2 coefficient

int16_t mb

mb coefficient

int16_t mc

mc coefficient

int16_t md

md coefficient

uint16_t ac4

ac4 coefficient

uint16_t ac5

ac5 coefficient

uint16_t ac6

ac6 coefficient

struct bmp180_params_t

Device initialization parameters.

i2c.h::i2c_t i2c_dev

I2C device which is used.

uint8_t i2c_addr

I2C address.

bmp180.h::bmp180_oversampling_mode_t oversampling

Oversampling mode.

struct bmp180_t

Device descriptor for the BMP180 sensor.

bmp180_params_t params

Device initialization parameters.

bmp180_calibration_t calibration

Device calibration.