BMPX8X Class Reference

C++ API for GY65/BMP085 and BMP180 chips (Atmospheric Pressure Sensor) More...

Detailed Description

• ID: bmpx8x
• Name: Bosch BMP Atmospheric Pressure Sensor
• Other Names: GY65 BMP085 BMP180 BMP183
• Category: pressure
• Manufacturer: seeed adafruit sparkfun
• Connection: i2c

The Bosch GY65/BMP085 and BMP180 are high precision, ultra-low power consumption pressure sensors. They have a range of between 30,000 and 110,000 Pa.

This module has been tested on the GY65/BMP085 and BMP180 sensors.

    uint32_t presure = 0;
    float temperature = 0;
    float altitude = 0;
    uint32_t sealevel = 0;

    // Instantiate a BMPX8X sensor on I2C
    sensor = new upm::BMPX8X(0, ADDR);

    // Print the pressure, altitude, sea level, and
    // temperature values every 0.1 seconds
    while (!doWork) {
        presure = sensor->getPressure ();
        temperature = sensor->getTemperature ();
        altitude = sensor->getAltitude ();
        sealevel = sensor->getSealevelPressure ();

        std::cout << "pressure value = " <<
                    presure <<
                    ", altitude value = " <<
                    altitude <<
                    ", sealevel value = " <<
                    sealevel <<
                    ", temperature = " <<
                    temperature << std::endl;
        usleep (100000);
    }

Public Member Functions
	BMPX8X (int bus, int devAddr=0x77, uint8_t mode=BMP085_ULTRAHIGHRES)
	~BMPX8X ()
int32_t	getPressure ()
int32_t	getPressureRaw ()
int16_t	getTemperatureRaw ()
float	getTemperature ()
int32_t	getSealevelPressure (float altitudeMeters=0)
float	getAltitude (float sealevelPressure=101325)
int32_t	computeB5 (int32_t UT)
uint16_t	i2cReadReg_16 (int reg)
mraa_result_t	i2cWriteReg (uint8_t reg, uint8_t value)
uint8_t	i2cReadReg_8 (int reg)

Constructor & Destructor Documentation

BMPX8X	(	int	bus,
		int	devAddr = 0x77,
		uint8_t	mode = BMP085_ULTRAHIGHRES
	)

Instanciates a BMPX8X object

Parameters

bus	number of used bus
devAddr	address of used i2c device
mode	BMP085 mode

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~BMPX8X

(

)

BMPX8X object destructor, basicaly it close i2c connection.

Member Function Documentation

int32_t getPressure

(

)

Return calculated pressure

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int32_t getPressureRaw

(

)

Get raw pressure data

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int16_t getTemperatureRaw

(

)

Get raw temperature data from chip

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float getTemperature

(

void

)

Return calculated temperature

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int32_t getSealevelPressure

(

float

altitudeMeters = 0

)

With given absolute altitude sea level can be calculated

Parameters

altitudeMeters

altitude

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float getAltitude

(

float

sealevelPressure = 101325

)

With given sea level altitude in meters can be calculated

Parameters

sealevelPressure

Sea level

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int32_t computeB5

(

int32_t

UT

)

Calculation of B5 (check spec for more information)

Parameters

UT

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uint16_t i2cReadReg_16

(

int

reg

)

Read two bytes register

Parameters

reg	address of a register

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mraa_result_t i2cWriteReg	(	uint8_t	reg,
		uint8_t	value
	)

Write to one byte register

Parameters

reg	address of a register
value	byte to be written

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uint8_t i2cReadReg_8

(

int

reg

)

Read one byte register

Parameters

reg	address of a register

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The documentation for this class was generated from the following files:

• /var/lib/jenkins/workspace/upm-doc-stable/src/bmpx8x/bmpx8x.h
• /var/lib/jenkins/workspace/upm-doc-stable/src/bmpx8x/bmpx8x.cxx