BMP280_Ware.c File Reference

Contain API adapted from Bosch official source code. More...

#include "include/BMP280_Ware.h"
#include <stdint.h>

Include dependency graph for BMP280_Ware.c:

Functions
float	bmp280_compensate_T_int32 (int32_t adc_T, Bmp280CalibParam *calData)
	calculate the temperature from BMP280 raw data More...
float	bmp280_compensate_P_int64 (int32_t adc_P, Bmp280CalibParam *calData)
	calculate pressure from BMP280 raw data More...
int8_t	bmp280_get_calib_param (uint8_t *rawCalibData, Bmp280CalibParam *outputParam)
	obtain factory calibration data from BMP280 More...

Detailed Description

Contain API adapted from Bosch official source code.

Date

2018-08-25

Function Documentation

float bmp280_compensate_P_int64	(	int32_t	adc_P,
		Bmp280CalibParam *	calData
	)

calculate pressure from BMP280 raw data

Parameters

adc_P	raw pressure data from BMP280
calData	BMP280 calibration data, should be specific to each sensor due to factory manufacturing

Returns

Returns pressure in Pa as unsigned 32 bit integer in Q24.8 format (24 integer bits and 8 fractional bits). Output value of “24674867” represents 24674867/256 = 96386.2 Pa = 963.862 hPa

float bmp280_compensate_T_int32	(	int32_t	adc_T,
		Bmp280CalibParam *	calData
	)

calculate the temperature from BMP280 raw data

Copyright (C) 2017 - 2018 Bosch Sensortec GmbH

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Parameters

adc_T	raw BMP280 reaiding
calData	BMP280 calibration data, should be specific to each sensor due to factory manufacturing

Returns

Returns rawCalibDataerature in DegC, resolution is 0.01 DegC. Output value of “5123” equals 51.23 DegC. calData->t_fine carries fine rawCalibDataerature as global value

int8_t bmp280_get_calib_param	(	uint8_t *	rawCalibData,
		Bmp280CalibParam *	outputParam
	)

obtain factory calibration data from BMP280

Parameters

rawCalibData	calibration data read from BMP280 registers
outputParam	pointer to output calibration data