BMP085 Digital Pressure Sensor

With a pressure sensor it is possible to measure the activity of a person. More...

Functions
int8_t	bmp085_available (void)
	Tests if BMP085 is available. More...
int8_t	bmp085_init (void)
	Initializes the BMP085 Pressure Sensor. More...
int8_t	bmp085_deinit (void)
	Deinitializes the sensor. More...
int16_t	bmp085_read_temperature (void)
	This function reads and returns the calibration compensated temerature. More...
int32_t	bmp085_read_pressure (uint8_t mode)
	This functions reads the temperature compensated value of one pressure conversion. More...

Operation modes
#define	BMP085_ULTRA_LOW_POWER   0
	Ultra low power mode.
#define	BMP085_STANDARD   1
	Standard mode.
#define	BMP085_HIGH_RESOLUTION   2
	High resolution mode.
#define	BMP085_ULTRA_HIGH_RES   3
	Ultra high resolution mode.

Detailed Description

With a pressure sensor it is possible to measure the activity of a person.

Especially the Bosch BMP085 allows the registration of small height fluctuations by sensing the air pressure. In some related papers, a concrete application was implemented, to show how a fall analysis could be done.

Function Documentation

int8_t bmp085_available

(

void

)

Tests if BMP085 is available.

Return values

1	is avaiable
0	is not available

Definition at line 161 of file bmp085.c.

References BMP085_AC1_ADDR.

Referenced by bmp085_init().

int8_t bmp085_deinit

(

void

)

Deinitializes the sensor.

Todo:

: Dummy function that does nothing

Definition at line 186 of file bmp085.c.

int8_t bmp085_init

(

void

)

Initializes the BMP085 Pressure Sensor.

Return values

0	bmp085 available
1	bmp085 not available

Definition at line 176 of file bmp085.c.

References bmp085_available().

int32_t bmp085_read_pressure

(

uint8_t

mode

)

This functions reads the temperature compensated value of one pressure conversion.

Parameters

mode	one of BMP085_ULTRA_LOW_POWER, BMP085_STANDARD, BMP085_HIGH_RESOLUTION and BMP085_ULTRA_HIGH_RES

Returns

Pressure in Pa

Definition at line 252 of file bmp085.c.

int16_t bmp085_read_temperature

(

void

)

This function reads and returns the calibration compensated temerature.

Returns

Temerature in 0.1 Degree

Definition at line 236 of file bmp085.c.