MityDSP::tcDspTlv254x Class Reference

The tcDspTlv254x class is used to set up and receive data from a TI TLV254X family A-to-D converter. More...

#include <core/DspTlv254x.h>

List of all members.

Public Member Functions
	tcDspTlv254x (tcDspMcbsp *apMcbsp, tuCfrReg auCfg, tcDspOutputLatch *apLatch=NULL, unsigned int anCSID=0)
	This constructor is used to initialize a TLV254x A-to-D converter over a specified McBSP interface.
	~tcDspTlv254x ()
	Default destructor.
void	write_config_reg (tuCfrReg auCfg)
	This routine writes a new value to the TLV524X config register.
tuCfrReg	read_config_reg (void)
	This routine reads the current TLV254X config register settings.
void	request_data (unsigned short anChannel)
	This routine issues a single-shot conversion request from the specified channel of the TLV254x.
unsigned short	read_data (void)
	This routine writes a FIFO read request to the TLV254x in order to retrieve data back from a previous request.

Public Attributes
unsigned long	RxWords
unsigned long	TxWords

Protected Attributes
tcDspMcbsp *	mpMcbsp
	the mcbsp object
tcDspOutputLatch *	mpCS
	the CS latch object
tuCmrReg	muCommand
	the command
tuCfrReg	muConfig
	the config
tuResultsReg	muResults
	the returned results
unsigned int	mnCSID
	the CS ID

Static Protected Attributes
static const unsigned int	gnNUM_INIT_CYCLES = 20000
	stall time for A2D init

---

Detailed Description

The tcDspTlv254x class is used to set up and receive data from a TI TLV254X family A-to-D converter.

The converter is accessed via a McBSP interface.

See also:

tcDspTlv254x Page

---

Constructor & Destructor Documentation

tcDspTlv254x::tcDspTlv254x	(	tcDspMcbsp *	apMcbsp,
		tuCfrReg	auCfg,
		tcDspOutputLatch *	apLatch = NULL,
		unsigned int	anCSID = 0
	)

This constructor is used to initialize a TLV254x A-to-D converter over a specified McBSP interface.

Parameters:

[in]	apMcbsp	Pointer to a McBSP interface object.
[in]	auCfg	A tuCfrReg structure for the desired configuration
[in]	apLatch	A pointer to a tcDspOutputLatch interface that contains control of the chip select line. This can be NULL.
[in]	anCSID	The ID for the ADC chip select in apLatch.

Note:

if NULL is provided as the apLatch, then the managing application must configure the chip select lines appropriately prior to constructing and accessing the read methods. Otherwise, the tcDspTlv254x class will request CS strobes appropriately.

Returns:

None.

tcDspTlv254x::~tcDspTlv254x

(

)

Default destructor.

---

Member Function Documentation

void tcDspTlv254x::write_config_reg

(

tuCfrReg

auCfg

)

This routine writes a new value to the TLV524X config register.

Parameters:

[in]

auCfg

The desired new configuration for the TLV524X.

Returns:

None.

tuCfrReg tcDspTlv254x::read_config_reg

(

void

)

This routine reads the current TLV254X config register settings.

Returns:

A tuCfrReg structure containing the current configuration.

void tcDspTlv254x::request_data

(

unsigned short

anChannel

)

This routine issues a single-shot conversion request from the specified channel of the TLV254x.

Parameters:

[in]

anChannel

The TLV254X channel to use.

Returns:

None.

unsigned short tcDspTlv254x::read_data

(

void

)

This routine writes a FIFO read request to the TLV254x in order to retrieve data back from a previous request.

Note that the application code must wait long enough to issue this read to ensure that the request has been completed.

Returns:

The contents of the Results Register

---

Member Data Documentation

unsigned long MityDSP::tcDspTlv254x::RxWords

unsigned long MityDSP::tcDspTlv254x::TxWords

tcDspMcbsp* MityDSP::tcDspTlv254x::mpMcbsp

protected

the mcbsp object

tcDspOutputLatch* MityDSP::tcDspTlv254x::mpCS

protected

the CS latch object

tuCmrReg MityDSP::tcDspTlv254x::muCommand

protected

the command

tuCfrReg MityDSP::tcDspTlv254x::muConfig

protected

the config

tuResultsReg MityDSP::tcDspTlv254x::muResults

protected

the returned results

unsigned int MityDSP::tcDspTlv254x::mnCSID

protected

the CS ID

const unsigned int MityDSP::tcDspTlv254x::gnNUM_INIT_CYCLES = 20000

staticprotected

stall time for A2D init