Adafruit_BMP3XX Class Reference

#include <Adafruit_BMP3XX.h>

Public Member Functions
	Adafruit_BMP3XX ()
	Instantiates sensor.
bool	begin_I2C (uint8_t addr=BMP3XX_DEFAULT_ADDRESS, TwoWire *theWire=&Wire)
	Initializes the sensor. More...
bool	begin_SPI (uint8_t cs_pin, SPIClass *theSPI=&SPI, uint32_t frequency=BMP3XX_DEFAULT_SPIFREQ)
	Sets up the hardware and initializes hardware SPI. More...
bool	begin_SPI (int8_t cs_pin, int8_t sck_pin, int8_t miso_pin, int8_t mosi_pin, uint32_t frequency=BMP3XX_DEFAULT_SPIFREQ)
	Sets up the hardware and initializes software SPI. More...
uint8_t	chipID (void)
	Reads the chip identifier. More...
float	readTemperature (void)
	Performs a reading and returns the ambient temperature. More...
float	readPressure (void)
	Performs a reading and returns the barometric pressure. More...
float	readAltitude (float seaLevel)
	Calculates the altitude (in meters). More...
bool	setTemperatureOversampling (uint8_t os)
	Setter for Temperature oversampling. More...
bool	setPressureOversampling (uint8_t os)
	Setter for Pressure oversampling. More...
bool	setIIRFilterCoeff (uint8_t fs)
	Setter for IIR filter coefficient. More...
bool	setOutputDataRate (uint8_t odr)
	Setter for output data rate (ODR) More...
bool	performReading (void)
	Perform a reading in blocking mode. More...

Public Attributes
double	temperature
	Temperature (Celsius) assigned after calling performReading()
double	pressure
	Pressure (Pascals) assigned after calling performReading()

Detailed Description

Adafruit_BMP3XX Class for both I2C and SPI usage. Wraps the Bosch library for Arduino usage

Member Function Documentation

begin_I2C()

bool Adafruit_BMP3XX::begin_I2C	(	uint8_t	addr = BMP3XX_DEFAULT_ADDRESS,
		TwoWire *	theWire = &Wire
	)

Initializes the sensor.

Hardware ss initialized, verifies it is in the I2C or SPI bus, then reads calibration data in preparation for sensor reads.

Parameters

addr	Optional parameter for the I2C address of BMP3. Default is 0x77
theWire	Optional parameter for the I2C device we will use. Default is "Wire"

Returns

True on sensor initialization success. False on failure.

begin_SPI() [1/2]

bool Adafruit_BMP3XX::begin_SPI	(	uint8_t	cs_pin,
		SPIClass *	theSPI = &SPI,
		uint32_t	frequency = BMP3XX_DEFAULT_SPIFREQ
	)

Sets up the hardware and initializes hardware SPI.

Parameters

cs_pin	The arduino pin # connected to chip select
theSPI	The SPI object to be used for SPI connections.
frequency	The SPI bus frequency

Returns

True if initialization was successful, otherwise false.

begin_SPI() [2/2]

bool Adafruit_BMP3XX::begin_SPI	(	int8_t	cs_pin,
		int8_t	sck_pin,
		int8_t	miso_pin,
		int8_t	mosi_pin,
		uint32_t	frequency = BMP3XX_DEFAULT_SPIFREQ
	)

Sets up the hardware and initializes software SPI.

Parameters

cs_pin	The arduino pin # connected to chip select
sck_pin	The arduino pin # connected to SPI clock
miso_pin	The arduino pin # connected to SPI MISO
mosi_pin	The arduino pin # connected to SPI MOSI
frequency	The SPI bus frequency

Returns

True if initialization was successful, otherwise false.

chipID()

uint8_t Adafruit_BMP3XX::chipID

(

void

)

Reads the chip identifier.

Returns

BMP3_CHIP_ID or BMP390_CHIP_ID

readTemperature()

float Adafruit_BMP3XX::readTemperature

(

void

)

Performs a reading and returns the ambient temperature.

Returns

Temperature in degrees Centigrade

readPressure()

float Adafruit_BMP3XX::readPressure

(

void

)

Performs a reading and returns the barometric pressure.

Returns

Barometic pressure in Pascals

readAltitude()

float Adafruit_BMP3XX::readAltitude

(

float

seaLevel

)

Calculates the altitude (in meters).

Reads the current atmostpheric pressure (in hPa) from the sensor and calculates via the provided sea-level pressure (in hPa).

Parameters

seaLevel

Sea-level pressure in hPa

Returns

Altitude in meters

setTemperatureOversampling()

bool Adafruit_BMP3XX::setTemperatureOversampling

(

uint8_t

oversample

)

Setter for Temperature oversampling.

Parameters

oversample

Oversampling setting, can be BMP3_NO_OVERSAMPLING, BMP3_OVERSAMPLING_2X, BMP3_OVERSAMPLING_4X, BMP3_OVERSAMPLING_8X, BMP3_OVERSAMPLING_16X, BMP3_OVERSAMPLING_32X

Returns

True on success, False on failure

setPressureOversampling()

bool Adafruit_BMP3XX::setPressureOversampling

(

uint8_t

oversample

)

Setter for Pressure oversampling.

Parameters

oversample

Oversampling setting, can be BMP3_NO_OVERSAMPLING, BMP3_OVERSAMPLING_2X, BMP3_OVERSAMPLING_4X, BMP3_OVERSAMPLING_8X, BMP3_OVERSAMPLING_16X, BMP3_OVERSAMPLING_32X

Returns

True on success, False on failure

setIIRFilterCoeff()

bool Adafruit_BMP3XX::setIIRFilterCoeff

(

uint8_t

filtercoeff

)

Setter for IIR filter coefficient.

Parameters

filtercoeff

Coefficient of the filter (in samples). Can be BMP3_IIR_FILTER_DISABLE (no filtering), BMP3_IIR_FILTER_COEFF_1, BMP3_IIR_FILTER_COEFF_3, BMP3_IIR_FILTER_COEFF_7, BMP3_IIR_FILTER_COEFF_15, BMP3_IIR_FILTER_COEFF_31, BMP3_IIR_FILTER_COEFF_63, BMP3_IIR_FILTER_COEFF_127

Returns

True on success, False on failure

setOutputDataRate()

bool Adafruit_BMP3XX::setOutputDataRate

(

uint8_t

odr

)

Setter for output data rate (ODR)

Parameters

odr

Sample rate in Hz. Can be BMP3_ODR_200_HZ, BMP3_ODR_100_HZ, BMP3_ODR_50_HZ, BMP3_ODR_25_HZ, BMP3_ODR_12_5_HZ, BMP3_ODR_6_25_HZ, BMP3_ODR_3_1_HZ, BMP3_ODR_1_5_HZ, BMP3_ODR_0_78_HZ, BMP3_ODR_0_39_HZ, BMP3_ODR_0_2_HZ, BMP3_ODR_0_1_HZ, BMP3_ODR_0_05_HZ, BMP3_ODR_0_02_HZ, BMP3_ODR_0_01_HZ, BMP3_ODR_0_006_HZ, BMP3_ODR_0_003_HZ, or BMP3_ODR_0_001_HZ

Returns

True on success, False on failure

performReading()

bool Adafruit_BMP3XX::performReading

(

void

)

Perform a reading in blocking mode.

Performs a full reading of all sensors in the BMP3XX.

Assigns the internal Adafruit_BMP3XX::temperature & Adafruit_BMP3XX::pressure member variables

Returns

True on success, False on failure

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

• Adafruit_BMP3XX.h
• Adafruit_BMP3XX.cpp