MAX31855 thermocouple sensor driver. More...

#include <MAX31855.h>

Inheritance diagram for Boardcore::MAX31855:

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Collaboration diagram for Boardcore::MAX31855:

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Public Member Functions
	MAX31855 (SPIBusInterface &bus, miosix::GpioPin cs, SPIBusConfig config=getDefaultSPIConfig())

bool	init ()
	Initialize the sensor.

bool	selfTest ()
	Check if the sensor is working.

bool	checkConnected ()
	Checks whether the thermocouple is connected or not.

TemperatureData	readInternalTemperature ()
	Read the device internal temperature (cold junction).

Public Member Functions inherited from Boardcore::Sensor< TemperatureData >
	Sensor ()

	Sensor (Sensor &&other)

virtual	~Sensor ()

void	sample () override
	Sample the sensor.

virtual TemperatureData	getLastSample ()

Public Member Functions inherited from Boardcore::AbstractSensor
virtual	~AbstractSensor ()

SensorErrors	getLastError ()
	Get last error for debugging purposes. Avoid silent fails.

Static Public Member Functions
static SPIBusConfig	getDefaultSPIConfig ()

Protected Member Functions
TemperatureData	sampleImpl () override
	Read a data sample from the sensor. In case of errors, the method should return the last available correct sample.

Additional Inherited Members
Public Types inherited from Boardcore::Sensor< TemperatureData >
using	DataType

Protected Attributes inherited from Boardcore::Sensor< TemperatureData >
DataType	lastSample

miosix::FastMutex	mutex

Protected Attributes inherited from Boardcore::AbstractSensor
SensorErrors	lastError = SensorErrors::NO_ERRORS

Detailed Description

MAX31855 thermocouple sensor driver.

The MAX31855 performs cold-junction compensation and digitizes the signal from a K, J, N, T, S, R, or E type thermocouple depending on the selected product variant. The data is output in a signed 14-bit, SPI-compatible, read-only format. This converter resolves temperatures to 0.25°C, allows readings as high as +1800°C and as low as -270°C, and exhibits thermocouple accuracy of ±2°C for temperatures ranging from -200°C to +700°C for K-type thermocouples.

Definition at line 43 of file MAX31855.h.

Constructor & Destructor Documentation

◆ MAX31855()

Boardcore::MAX31855::MAX31855	(	SPIBusInterface &	bus,
		miosix::GpioPin	cs,
		SPIBusConfig	config = getDefaultSPIConfig() )

Definition at line 30 of file MAX31855.cpp.

Member Function Documentation

◆ checkConnected()

bool Boardcore::MAX31855::checkConnected ( )

Checks whether the thermocouple is connected or not.

Returns: True if the thermocouple is connected.

Definition at line 48 of file MAX31855.cpp.

◆ getDefaultSPIConfig()

SPIBusConfig Boardcore::MAX31855::getDefaultSPIConfig ( )

static

Definition at line 36 of file MAX31855.cpp.

◆ init()

bool Boardcore::MAX31855::init ( )

virtual

Initialize the sensor.

Returns: boolean value indicating whether the operation succeded or not

Implements Boardcore::AbstractSensor.

Definition at line 44 of file MAX31855.cpp.

◆ readInternalTemperature()

TemperatureData Boardcore::MAX31855::readInternalTemperature ( )

Read the device internal temperature (cold junction).

Definition at line 88 of file MAX31855.cpp.

◆ sampleImpl()

TemperatureData Boardcore::MAX31855::sampleImpl ( )

overrideprotectedvirtual

Read a data sample from the sensor. In case of errors, the method should return the last available correct sample.

Returns: sensor data sample

Implements Boardcore::Sensor< TemperatureData >.

Definition at line 69 of file MAX31855.cpp.

◆ selfTest()

bool Boardcore::MAX31855::selfTest ( )

virtual

Check if the sensor is working.

Returns: boolean indicating whether the sensor is correctly working or not

Implements Boardcore::AbstractSensor.

Definition at line 46 of file MAX31855.cpp.

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

src/shared/sensors/MAX31855/MAX31855.h
src/shared/sensors/MAX31855/MAX31855.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members