API Reference

Author: Ceyhun Şen

Defines

I2C_LIB

Library that includes I2C functions.

Change this definition to your MCU’s I2C HAL library. E.g. “stm32f4xx_hal.h”.

Typedefs

typedef struct bmp180_t bmp180_t

Enums

enum _bmp180_oversampling_settings

Oversampling settings for BMP180 sensor.

Values:

enumerator ultra_low_power

enumerator standart

enumerator high_resolution

enumerator ultra_high_resolution

Functions

uint8_t bmp180_init(I2C_HandleTypeDef *hi2cx, bmp180_t *bmp180)

Initialize sensor and get calibration values.

Parameters

hi2cx – I2C handle.
bmp180 – bmp180_t struct to initialize.

Returns

0 on success, 1 on sensor is not ready, 2 on sensor error.

void bmp180_get_all(bmp180_t *bmp180)

Get all sensor data at once.

Parameters: bmp180 – bmp180_t struct to write data.
Return values: None. –

void bmp180_get_temperature(bmp180_t *bmp180)

Get temperature data.

Parameters: bmp180 – bmp180_t struct to write data.
Return values: None. –

void bmp180_get_pressure(bmp180_t *bmp180)

Get pressure data.

Parameters: bmp180 – bmp180_t struct to write data.
Return values: None. –

void bmp180_get_altitude(bmp180_t *bmp180)

Calculate altitude from pressure data.

Parameters: bmp180 – bmp180_t struct to write data.
Return values: None. –

void bmp180_set_sea_pressure(bmp180_t *bmp180, int32_t sea_pressure)

Set sea pressure.

Parameters

bmp180 – bmp180_t struct to write data.
sea_pressure – New sea pressure.

Return values

None. –

struct bmp180_t

#include <bmp180.h>

Holds sensor data, sensor settings and calibration values.

Public Members

I2C_HandleTypeDef *hi2cx

float temperature

int32_t pressure

float altitude

int32_t sea_pressure

enum _bmp180_oversampling_settings oversampling_setting

uint8_t oss

int16_t AC1

int16_t AC2

int16_t AC3

uint16_t AC4

uint16_t AC5

uint16_t AC6

int16_t B1

int16_t B2

int32_t B3

uint32_t B4

int32_t B5

int32_t B6

uint32_t B7

int16_t MB

int16_t MC

int16_t MD