Library Functions. More...

Functions
TM_BMP180_Result_t	TM_BMP180_Init (TM_BMP180_t *BMP180_Data)
	Initializes BMP180 pressure sensor. More...

TM_BMP180_Result_t	TM_BMP180_StartTemperature (TM_BMP180_t *BMP180_Data)
	Starts temperature sensor on BMP180. More...

TM_BMP180_Result_t	TM_BMP180_ReadTemperature (TM_BMP180_t *BMP180_Data)
	Reads temperature from BMP180 sensor. More...

TM_BMP180_Result_t	TM_BMP180_StartPressure (TM_BMP180_t *BMP180_Data, TM_BMP180_Oversampling_t Oversampling)
	Starts pressure measurement on BMP180 sensor. More...

TM_BMP180_Result_t	TM_BMP180_ReadPressure (TM_BMP180_t *BMP180_Data)
	Reads pressure from BMP180 sensor and calculate it. More...

uint32_t	TM_BMP180_GetPressureAtSeaLevel (uint32_t pressure, float altitude)
	Calculates pressure above sea level in pascals. More...

Detailed Description

Library Functions.

Function Documentation

uint32_t TM_BMP180_GetPressureAtSeaLevel	(	uint32_t	pressure,
		float	altitude
	)

Calculates pressure above sea level in pascals.

This is good, if you read pressure from sensor at known altitude, not altitude provided from sensor. Altitude from sensor is calculated in fact, that pressure above the sea is 101325 Pascals. So, if you know your pressure, and you use calculated altitude, you will not get real pressure above the sea.

Warning: You need calculated pressure from sensor, and known altitude (from other sensor or GPS data, or whatever) and then you are able to calculate pressure above the sea level.

Parameters

pressure	Pressure at known altitude in units of pascals
altitude	Known altitude in units of meters

Return values

Pressure above the sea in units of pascals

TM_BMP180_Result_t TM_BMP180_Init ( TM_BMP180_t * BMP180_Data )

Initializes BMP180 pressure sensor.

Parameters

*BMP180_Data Pointer to TM_BMP180_t structure

Return values

Member of TM_BMP180_Result_t

TM_BMP180_Result_t TM_BMP180_ReadPressure ( TM_BMP180_t * BMP180_Data )

Reads pressure from BMP180 sensor and calculate it.

Parameters

*BMP180_Data Pointer to TM_BMP180_t structure

Return values

Member of TM_BMP180_Result_t

TM_BMP180_Result_t TM_BMP180_ReadTemperature ( TM_BMP180_t * BMP180_Data )

Reads temperature from BMP180 sensor.

Note: Temperature has 0.1 degrees Celcius resolution

Parameters

*BMP180_Data Pointer to TM_BMP180_t structure

Return values

Member of TM_BMP180_Result_t

TM_BMP180_Result_t TM_BMP180_StartPressure	(	TM_BMP180_t *	BMP180_Data,
		TM_BMP180_Oversampling_t	Oversampling
	)

Starts pressure measurement on BMP180 sensor.

Parameters

*BMP180_Data	Pointer to TM_BMP180_t structure
Oversampling	Oversampling option for pressure calculation. This parameter can be a value of TM_BMP180_Oversampling_t enumeration

Note: Calculation time depends on selected oversampling

Return values

Member of TM_BMP180_Result_t

TM_BMP180_Result_t TM_BMP180_StartTemperature ( TM_BMP180_t * BMP180_Data )

Starts temperature sensor on BMP180.

Parameters

*BMP180_Data Pointer to TM_BMP180_t structure

Return values

Member of TM_BMP180_Result_t