MityDSP::tcDspDac8532McBsp Class Reference

Instances of this class create an interface to an ADS834x 16-bit analog to digital converter. More...

#include <core/DspDac8532McBsp.h>

List of all members.

Classes
union	tuCtrlWord

Public Member Functions
	tcDspDac8532McBsp (int mnMcBSPDevNum, unsigned int anSCLKFreq_Hz=12500000, unsigned int anFOutput_Hz=12500, int anHWVector=9)
	This constructor is used to open a tcDspDac8532McBsp interface with the the specified settings (optional).
	~tcDspDac8532McBsp ()
	Default destructor.
unsigned int	SetSamples (unsigned short SampleA, unsigned short SampleB, SEM_Handle mhDataOutputSem)
	Set samples for the DAC.

Protected Types
enum	teSampleState { eeWritingA, eeWritingB, eeIDLE }

Protected Member Functions
void	ISRHandler (void)
	Interrupt service routine handler for tcDspDac8532McBsp object.

Static Protected Member Functions
static void	DispatchISRHandler (Arg apThis)
	Static convenience function to display interrupt handler for McBSP Tx Ready condition.

Protected Attributes
unsigned int	mnOutputRateHz
int	mnDevNum
	the McBSP running port number
MCBSP_Handle	mhMcBSPHandle
	CSL Handle to McBSP.
volatile SEM_Handle	mhDataOutputSem
	semaphore handle to post for continous capture
volatile teSampleState	meSampleState
volatile unsigned int	mnSampleA
volatile unsigned int	mnSampleB
volatile unsigned int	mnNextSampleA
volatile unsigned int	mnNextSampleB
volatile bool	mbNextSampleSet
unsigned int	mnIntCount
unsigned int	mnIdleCount

---

Detailed Description

Instances of this class create an interface to an ADS834x 16-bit analog to digital converter.

See also:

tcDspDac8532McBsp Page

---

Member Enumeration Documentation

enum MityDSP::tcDspDac8532McBsp::teSampleState

protected

Enumerator:

eeWritingA
eeWritingB
eeIDLE

---

Constructor & Destructor Documentation

tcDspDac8532McBsp::tcDspDac8532McBsp	(	int	mnMcBSPDevNum,
		unsigned int	anSCLKFreq_Hz = 12500000,
		unsigned int	anFSample_Hz = 12500,
		int	anHWVector = 9
	)

This constructor is used to open a tcDspDac8532McBsp interface with the the specified settings (optional).

Parameters:

[in]	mnMcBSPDevNum	McBDSP Number as defined by CSL (MCBSP_DEV0 or MCBSP_DEV1 for MityDSP/XM) (CSL_MCBSP_0 or CSL_MCBSP_1 for MityDSP-PRO)
[in]	anSCLKFreq_Hz	Desired chip SCLK rate, in Hz, Max 30 MHz (default 12.5 MHz)
[in]	anFSample_Hz	Desired output rate (per channel), in Hz (default 12.5 KHz)
[in]	anHWVector	DSP Interrupt vector number to use for McBSP interrups (default 9)

Note:

The SCLK rate must be evenly divisible by the cpu_clock / 2 (or 4 for the PRO)

Returns:

None.

See also:

DspDac8532McBsp.h

tcDspDac8532McBsp::~tcDspDac8532McBsp

(

)

Default destructor.

Returns:

None.

---

Member Function Documentation

unsigned int tcDspDac8532McBsp::SetSamples	(	unsigned short	SampleA,
		unsigned short	SampleB,
		SEM_Handle	ahDataOutputSem
	)

Set samples for the DAC.

Parameters:

[in]	SampleA	the value for the A DAC output channel
[in]	SampleB	the value for the B DAC output channel
[in,out]	ahDataOutputSem	The Semaphore that should be posted when the DAC outputs have been updated.

Returns:

zero on success

See also:

DspDac8532McBsp.h

void tcDspDac8532McBsp::DispatchISRHandler ( Arg  apThis )

staticprotected

Static convenience function to display interrupt handler for McBSP Tx Ready condition.

Parameters:

[in]

apThis

Pointer to the valid tcDspDac8532McBsp controller class.

Returns:

None.

void tcDspDac8532McBsp::ISRHandler ( void  )

protected

Interrupt service routine handler for tcDspDac8532McBsp object.

Based on current state (writing A channel or B channel) will update then next DAC value and if B value is updated will transfer buffer to the DAC outputs.

Returns:

None.

---

Member Data Documentation

unsigned int MityDSP::tcDspDac8532McBsp::mnOutputRateHz

protected

int MityDSP::tcDspDac8532McBsp::mnDevNum

protected

the McBSP running port number

MCBSP_Handle MityDSP::tcDspDac8532McBsp::mhMcBSPHandle

protected

CSL Handle to McBSP.

volatile SEM_Handle MityDSP::tcDspDac8532McBsp::mhDataOutputSem

protected

semaphore handle to post for continous capture

volatile teSampleState MityDSP::tcDspDac8532McBsp::meSampleState

protected

volatile unsigned int MityDSP::tcDspDac8532McBsp::mnSampleA

protected

volatile unsigned int MityDSP::tcDspDac8532McBsp::mnSampleB

protected

volatile unsigned int MityDSP::tcDspDac8532McBsp::mnNextSampleA

protected

volatile unsigned int MityDSP::tcDspDac8532McBsp::mnNextSampleB

protected

volatile bool MityDSP::tcDspDac8532McBsp::mbNextSampleSet

protected

unsigned int MityDSP::tcDspDac8532McBsp::mnIntCount

protected

unsigned int MityDSP::tcDspDac8532McBsp::mnIdleCount

protected