MityDSP::tcDspThermBase Class Reference

The tcDspThermBase class is a virtual base class to provide consistent access to various thermistor devices. More...

#include <core/DspThermBase.h>

Inheritance diagram for MityDSP::tcDspThermBase:

Public Member Functions
	tcDspThermBase (float anVref, unsigned int anAdcBits, float anFeedbackR, float anBeta)
	This constructor is used to initialize the thermistor base class.
virtual	~tcDspThermBase ()
	Destructor.
virtual void	SetSensorVal (unsigned short anVal)
	This routine updates the sensor's current value, and computes the matching temperature.
virtual float	GetSensorTemp (void)
	This routine returns a given sensor's current temperature, in deg-C.
virtual void	GetThermoParams (float &arT0, float &arRt0, float &arVin)
	This routine returns the current constants in use by the Thermistor derived class.
virtual bool	SetThermoParams (float anT0=0.0f, float anRt0=0.0f, float anVin=0.0f)
	This routine may be used to update the constants in use by the Thermistor derived class.
Static Public Attributes
static const int	gnKelvinToCentigrade = 273
	Conversion from deg-K to deg-C.
Protected Member Functions
virtual void	ComputeTemp (void)=0
Protected Attributes
SEM_Handle	mhMutex
	Serial access across threads.
unsigned int	mnAdcSteps
	ADC data range.
float	mnVReference
	Reference voltage.
float	mnFeebackR
	feedback resistor value (ohms)
float	mnBeta
	thermistor beta value
unsigned short	mnAdcCount
	last-known ADC count
float	mnTempDegC
	last computed temperature (deg-C)
float	mnT0
	Temperature T0 (in deg-K).
float	mnRt0
	Resistance @ T0.
float	mnVin
	Thermistor input voltage.

Detailed Description

The tcDspThermBase class is a virtual base class to provide consistent access to various thermistor devices.

It provides functions for converting ADC counts into temperatures and storing the last-known values.

tcDspThermBase::tcDspThermBase	(	float	anVref,
		unsigned int	anAdcBits,
		float	anFeedbackR,
		float	anBeta
	)

This constructor is used to initialize the thermistor base class.

Parameters:

`[in]`	anVref	Reference voltage for the thermistor.
`[in]`	anAdcBits	Number of bits returned by ADC.
`[in]`	anFeedbackR	Feedback resistor value.
`[in]`	anBeta	Thermistor Beta value.

tcDspThermBase::~tcDspThermBase ( ) [virtual]

Destructor.

void tcDspThermBase::SetSensorVal ( unsigned short anVal ) [virtual]

This routine updates the sensor's current value, and computes the matching temperature.

Parameters:

[in] anVal Latest ADC value.

float tcDspThermBase::GetSensorTemp ( void ) [virtual]

This routine returns a given sensor's current temperature, in deg-C.

void tcDspThermBase::GetThermoParams	(	float &	arT0,
		float &	arRt0,
		float &	arVin
	)			`[virtual]`

This routine returns the current constants in use by the Thermistor derived class.

It is provided mainly for situations where fine tuning of the default parameters may be required.

Parameters:

`[in]`	arT0	Reference to T0 temperature (deg-K)
`[in]`	arRt0	Reference to resistance at T0 (ohms)
`[in]`	arVin	Reference to thermistor input voltage (volts)