MPL3115A2 Class Reference

API for the MPL3115A2 Atmospheric Pressure Sensor. More...

Detailed Description

• ID: mpl3115a2
• Name: MPL3115A2 Atmospheric Pressure Sensor
• Category: pressure
• Manufacturer: freescale
• Link: http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MPL3115A2
• Connection: i2c

Freescale Semiconductor* MPL3115A2 is a high-precision, ultra-low power consumption pressure sensor. Its operating range is 50-110 kPa.

        // Instantiate a MPL3115A2 sensor on I2C
        upm_mpl3115a2.MPL3115A2 sensor = new upm_mpl3115a2.MPL3115A2(0);

        while (true) {
            System.out.println("Pressure: " + sensor.getPressure());
            System.out.println("Altitude: " + sensor.getAltitude());
            System.out.println("Sealevel pressure: " + sensor.getSealevelPressure());
            System.out.println("Temperature: " + sensor.getTemperature());
            System.out.println();

            Thread.sleep(1000);
        }

Public Member Functions
synchronized void	delete ()
	MPL3115A2 (int bus, int devAddr, short mode)
	MPL3115A2 (int bus, int devAddr)
	MPL3115A2 (int bus)
int	testSensor ()
int	resetSensor ()
void	dumpSensor ()
int	sampleData ()
int	getPressureReg (int reg)
int	getTempReg (int reg)
float	getPressure (int bSampleData)
float	getPressure ()
float	getTemperature (int bSampleData)
float	getTemperature ()
float	getSealevelPressure (float altitudeMeters)
float	getSealevelPressure ()
float	getAltitude (float sealevelPressure)
float	getAltitude ()
void	setOversampling (short oversampling)
short	getOversampling ()
float	getTemperatureMax ()
float	getTemperatureMin ()
float	getPressureMax ()
float	getPressureMin ()
float	convertTempCtoF (float fTemp)
float	convertPaToinHg (float fPressure)
int	i2cWriteReg (short reg, short value)
int	i2cReadReg_16 (int reg)
short	i2cReadReg_8 (int reg)

Constructor & Destructor Documentation

MPL3115A2	(	int	bus,
		int	devAddr,
		short	mode
	)

Instantiates an MPL3115A2 object

Parameters

bus	Number of the used bus
devAddr	Address of the used I2C device
mode	MPL3115A2 oversampling (6 = 64x)

Member Function Documentation

float convertPaToinHg

(

float

fPressure

)

Converts pressure from Pa*100 to inHg*10000 This is set for 15degC (Pa = 0.0002961 in Hg) TODO: Change the function to add temperature calibration

Parameters

iPressure

Pressure in Pa

float convertTempCtoF

(

float

fTemp

)

Converts temperature from degC*1000 to degF*1000

Parameters

iTemp

Temperature in degC

float getAltitude

(

float

sealevelPressure

)

Reads the current pressure and, using a known sea level pressure, calculates the altitude value [m] This function should be preceded by the sampleData() call

Parameters

sealevelPressure

Current sea level pressure

float getPressure

(

int

bSampleData

)

Reads the current pressure value from MPL3115A2 [Pa]

Parameters

bSampleData

Sets non-zero to a sample reading

int getPressureReg

(

int

reg

)

Reads the pressure value from MPL3115A2 [Pa * 100]

Parameters

reg	Base address of the pressure register

float getSealevelPressure

(

float

altitudeMeters

)

Reads the current pressure and, using a known altitude, calculates the sea level pressure value [Pa] This function should be preceded by the sampleData() call

Parameters

altitudeMeters

Altitude in meters

float getTemperature

(

int

bSampleData

)

Reads the current temperature value from MPL3115A2 [degC]

Parameters

bSampleData

Sets non-zero to a sample reading

int getTempReg

(

int

reg

)

Reads the temperature value from MPL3115A2 [degC * 1000]

Parameters

reg	Base address of the temperature register

int i2cReadReg_16

(

int

reg

)

Reads two bytes from an I2C register

Parameters

reg	Address of the register

short i2cReadReg_8

(

int

reg

)

Reads a one-byte register

Parameters

reg	Address of the register

int i2cWriteReg	(	short	reg,
		short	value
	)

Writes one byte to an I2C register

Parameters

reg	Address of the register
value	Byte to be written

void setOversampling

(

short

oversampling

)

Defines the oversampling setting (ranges from 0 to 7). The value represents 2^n samples (ranging from 1 to 128). The time to calculate a sample is approximately (2^n * 4 + 2) ms

Parameters

oversampling

New oversampling value

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

• /var/lib/jenkins/workspace/upm-doc-stable/build-33/src/mpl3115a2/MPL3115A2.java