MAX31855 thermocouple sensor driver. More...

#include <MAX31856.h>

Inheritance diagram for Boardcore::MAX31856:

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Collaboration diagram for Boardcore::MAX31856:

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Public Types
enum class	ThermocoupleType : uint8_t { B_TYPE = 0x0 , E_TYPE = 0x1 , J_TYPE = 0x2 , K_TYPE = 0x3 , N_TYPE = 0x4 , R_TYPE = 0x5 , S_TYPE = 0x6 , T_TYPE = 0x7 , GAIN_8 = 0x8 , GAIN_32 = 0x9 }

Public Types inherited from Boardcore::Sensor< MAX31856Data >
using	DataType

Public Member Functions
	MAX31856 (SPIBusInterface &bus, miosix::GpioPin cs, SPIBusConfig config=getDefaultSPIConfig(), ThermocoupleType type=ThermocoupleType::K_TYPE)

bool	init ()
	Initialize the sensor.

bool	selfTest ()
	Check if the sensor is working.

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

void	setThermocoupleType (ThermocoupleType type)

void	setColdJunctionOffset (float offset)

Public Member Functions inherited from Boardcore::Sensor< MAX31856Data >
	Sensor ()

	Sensor (Sensor &&other)

virtual	~Sensor ()

void	sample () override
	Sample the sensor.

virtual MAX31856Data	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
MAX31856Data	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
Protected Attributes inherited from Boardcore::Sensor< MAX31856Data >
DataType	lastSample

miosix::FastMutex	mutex

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

Detailed Description

MAX31855 thermocouple sensor driver.

The MAX31856 performs cold-junction compensation and digitizes the signal from any type of thermocouple. This converter resolves temperatures to 0.0078125°C, allows readings as high as +1800°C and as low as -210°C (depending on thermocouple type), and exhibits thermocouple voltage measurement accuracy of ±0.15%. The thermocouple inputs are protected against over voltage conditions up to ±45V. A lookup table (LUT) stores linearity correction data for several types of thermocouples (K, J, N, R, S, T, E, and B). Line frequency filtering of 50Hz and 60Hz is included, as is thermocouple fault detection

Definition at line 47 of file MAX31856.h.

Member Enumeration Documentation

◆ ThermocoupleType

enum class Boardcore::MAX31856::ThermocoupleType : uint8_t

strong

Enumerator
B_TYPE
E_TYPE
J_TYPE
K_TYPE
N_TYPE
R_TYPE
S_TYPE
T_TYPE
GAIN_8
GAIN_32

Definition at line 50 of file MAX31856.h.

Constructor & Destructor Documentation

◆ MAX31856()

Boardcore::MAX31856::MAX31856	(	SPIBusInterface &	bus,
		miosix::GpioPin	cs,
		SPIBusConfig	config = getDefaultSPIConfig(),
		ThermocoupleType	type = ThermocoupleType::K_TYPE )

Definition at line 30 of file MAX31856.cpp.

Member Function Documentation

◆ checkConnected()

bool Boardcore::MAX31856::checkConnected ( )

Checks whether the thermocouple is connected or not.

Returns: True if the thermocouple is connected.

Definition at line 65 of file MAX31856.cpp.

◆ getDefaultSPIConfig()

SPIBusConfig Boardcore::MAX31856::getDefaultSPIConfig ( )

static

Definition at line 36 of file MAX31856.cpp.

◆ init()

bool Boardcore::MAX31856::init ( )

virtual

Initialize the sensor.

Returns: boolean value indicating whether the operation succeded or not

Implements Boardcore::AbstractSensor.

Definition at line 45 of file MAX31856.cpp.

◆ sampleImpl()

MAX31856Data Boardcore::MAX31856::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< MAX31856Data >.

Definition at line 98 of file MAX31856.cpp.

◆ selfTest()

bool Boardcore::MAX31856::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 63 of file MAX31856.cpp.

◆ setColdJunctionOffset()

void Boardcore::MAX31856::setColdJunctionOffset ( float offset )

Definition at line 91 of file MAX31856.cpp.

◆ setThermocoupleType()

void Boardcore::MAX31856::setThermocoupleType ( ThermocoupleType type )

Definition at line 85 of file MAX31856.cpp.

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

src/shared/sensors/MAX31856/MAX31856.h
src/shared/sensors/MAX31856/MAX31856.cpp

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members