dsp2833x_dma.c

TMS32028335 的一些例程

//###########################################################################
//
// FILE:	DSP2833x_DMA.c
//
// TITLE:	DSP2833x Device DMA Initialization & Support Functions.
//
//###########################################################################
// $TI Release: DSP2833x Header Files V1.01 $
// $Release Date: September 26, 2007 $
//###########################################################################

#include "DSP2833x_Device.h"     // Headerfile Include File
#include "DSP2833x_Examples.h"   // Examples Include File

// This function initializes the DMA to a known state.
//
void DMAInitialize(void)
{
	EALLOW;

	// Perform a hard reset on DMA
	DmaRegs.DMACTRL.bit.HARDRESET = 1;

	// Allow DMA to run free on emulation suspend
	DmaRegs.DEBUGCTRL.bit.FREE = 1;
	
	EDIS;
}

  
void DMACH1AddrConfig(volatile Uint16 *DMA_Dest,volatile Uint16 *DMA_Source)
{
	EALLOW;
	// Set up SOURCE address:
	DmaRegs.CH1.SRC_BEG_ADDR_SHADOW = (Uint32)DMA_Source;	// Point to beginning of source buffer
	DmaRegs.CH1.SRC_ADDR_SHADOW =     (Uint32)DMA_Source;

	// Set up DESTINATION address:
	DmaRegs.CH1.DST_BEG_ADDR_SHADOW = (Uint32)DMA_Dest;	    // Point to beginning of destination buffer
	DmaRegs.CH1.DST_ADDR_SHADOW =     (Uint32)DMA_Dest;

	
	EDIS;
}

void DMACH1BurstConfig(Uint16 bsize, int16 srcbstep, int16 desbstep)
{
	EALLOW;
	
	// Set up BURST registers:
	DmaRegs.CH1.BURST_SIZE.all = bsize;	                // Number of words(X-1) x-ferred in a burst
	DmaRegs.CH1.SRC_BURST_STEP = srcbstep;			    // Increment source addr between each word x-ferred
	DmaRegs.CH1.DST_BURST_STEP = desbstep;              // Increment dest addr between each word x-ferred


	EDIS;
}

void DMACH1TransferConfig(Uint16 tsize, int16 srctstep, int16 deststep)
{
	EALLOW;
	
	// Set up TRANSFER registers:
	DmaRegs.CH1.TRANSFER_SIZE = tsize;                  // Number of bursts per transfer, DMA interrupt will occur after completed transfer
	DmaRegs.CH1.SRC_TRANSFER_STEP = srctstep;			// TRANSFER_STEP is ignored when WRAP occurs
	DmaRegs.CH1.DST_TRANSFER_STEP = deststep;			// TRANSFER_STEP is ignored when WRAP occurs

	EDIS;
}

void DMACH1WrapConfig(Uint16 srcwsize, int16 srcwstep, Uint16 deswsize, int16 deswstep)
{
	EALLOW;
	
		// Set up WRAP registers:
	DmaRegs.CH1.SRC_WRAP_SIZE = srcwsize;				// Wrap source address after N bursts
    DmaRegs.CH1.SRC_WRAP_STEP = srcwstep;			    // Step for source wrap

	DmaRegs.CH1.DST_WRAP_SIZE = deswsize;				// Wrap destination address after N bursts
	DmaRegs.CH1.DST_WRAP_STEP = deswstep;				// Step for destination wrap
	
	EDIS;
}


void DMACH1ModeConfig(Uint16 persel, Uint16 perinte, Uint16 oneshot, Uint16 cont, Uint16 synce, Uint16 syncsel, Uint16 ovrinte, Uint16 datasize, Uint16 chintmode, Uint16 chinte)
{
	EALLOW;
	    
	// Set up MODE Register:
	DmaRegs.CH1.MODE.bit.PERINTSEL = persel;	    // Passed DMA channel as peripheral interrupt source
	DmaRegs.CH1.MODE.bit.PERINTE = perinte;       	// Peripheral interrupt enable
	DmaRegs.CH1.MODE.bit.ONESHOT = oneshot;       	// Oneshot enable
	DmaRegs.CH1.MODE.bit.CONTINUOUS = cont;    		// Continous enable
	DmaRegs.CH1.MODE.bit.SYNCE = synce;         	// Peripheral sync enable/disable
	DmaRegs.CH1.MODE.bit.SYNCSEL = syncsel;       	// Sync effects source or destination
	DmaRegs.CH1.MODE.bit.OVRINTE = ovrinte;         // Enable/disable the overflow interrupt
	DmaRegs.CH1.MODE.bit.DATASIZE = datasize;      	// 16-bit/32-bit data size transfers
	DmaRegs.CH1.MODE.bit.CHINTMODE = chintmode;		// Generate interrupt to CPU at beginning/end of transfer
	DmaRegs.CH1.MODE.bit.CHINTE = chinte;        	// Channel Interrupt to CPU enable

	// Clear any spurious flags:
	DmaRegs.CH1.CONTROL.bit.PERINTCLR = 1;  		// Clear any spurious interrupt flags
	DmaRegs.CH1.CONTROL.bit.SYNCCLR = 1;    		// Clear any spurious sync flags
	DmaRegs.CH1.CONTROL.bit.ERRCLR = 1; 	     	// Clear any spurious sync error flags

	// Initialize PIE vector for CPU interrupt:
	PieCtrlRegs.PIEIER7.bit.INTx1 = 1;              // Enable DMA CH1 interrupt in PIE

	EDIS;
}

// This function starts DMA Channel 1. 
void StartDMACH1(void)
{
	EALLOW;
	DmaRegs.CH1.CONTROL.bit.RUN = 1;
	EDIS;
}

void DMACH2AddrConfig(volatile Uint16 *DMA_Dest,volatile Uint16 *DMA_Source)
{
	EALLOW;
	
	// Set up SOURCE address:
	DmaRegs.CH2.SRC_BEG_ADDR_SHADOW = (Uint32)DMA_Source;	// Point to beginning of source buffer
	DmaRegs.CH2.SRC_ADDR_SHADOW =     (Uint32)DMA_Source;

	// Set up DESTINATION address:
	DmaRegs.CH2.DST_BEG_ADDR_SHADOW = (Uint32)DMA_Dest;	    // Point to beginning of destination buffer
	DmaRegs.CH2.DST_ADDR_SHADOW =     (Uint32)DMA_Dest;

	
	EDIS;
}

void DMACH2BurstConfig(Uint16 bsize, int16 srcbstep, int16 desbstep)
{
	EALLOW;

	// Set up BURST registers:
	DmaRegs.CH2.BURST_SIZE.all = bsize;	                // Number of words(X-1) x-ferred in a burst
	DmaRegs.CH2.SRC_BURST_STEP = srcbstep;			    // Increment source addr between each word x-ferred
	DmaRegs.CH2.DST_BURST_STEP = desbstep;              // Increment dest addr between each word x-ferred


	EDIS;
}

void DMACH2TransferConfig(Uint16 tsize, int16 srctstep, int16 deststep)
{
	EALLOW;
	
		// Set up TRANSFER registers:
	DmaRegs.CH2.TRANSFER_SIZE = tsize;                  // Number of bursts per transfer, DMA interrupt will occur after completed transfer
	DmaRegs.CH2.SRC_TRANSFER_STEP = srctstep;			// TRANSFER_STEP is ignored when WRAP occurs
	DmaRegs.CH2.DST_TRANSFER_STEP = deststep;			// TRANSFER_STEP is ignored when WRAP occurs

	EDIS;
}

void DMACH2WrapConfig(Uint16 srcwsize, int16 srcwstep, Uint16 deswsize, int16 deswstep)
{
	EALLOW;
	
		// Set up WRAP registers:
	DmaRegs.CH2.SRC_WRAP_SIZE = srcwsize;				// Wrap source address after N bursts
    DmaRegs.CH2.SRC_WRAP_STEP = srcwstep;			    // Step for source wrap

	DmaRegs.CH2.DST_WRAP_SIZE = deswsize;				// Wrap destination address after N bursts
	DmaRegs.CH2.DST_WRAP_STEP = deswstep;				// Step for destination wrap
	
	EDIS;
}


void DMACH2ModeConfig(Uint16 persel, Uint16 perinte, Uint16 oneshot, Uint16 cont, Uint16 synce, Uint16 syncsel, Uint16 ovrinte, Uint16 datasize, Uint16 chintmode, Uint16 chinte)
{
	EALLOW;
	
		// Set up MODE Register:
	DmaRegs.CH2.MODE.bit.PERINTSEL = persel;	    // Passed DMA channel as peripheral interrupt source
	DmaRegs.CH2.MODE.bit.PERINTE = perinte;       	// Peripheral interrupt enable
	DmaRegs.CH2.MODE.bit.ONESHOT = oneshot;       	// Oneshot enable
	DmaRegs.CH2.MODE.bit.CONTINUOUS = cont;    		// Continous enable
	DmaRegs.CH2.MODE.bit.SYNCE = synce;         	// Peripheral sync enable/disable
	DmaRegs.CH2.MODE.bit.SYNCSEL = syncsel;       	// Sync effects source or destination
	DmaRegs.CH2.MODE.bit.OVRINTE = ovrinte;         // Enable/disable the overflow interrupt
	DmaRegs.CH2.MODE.bit.DATASIZE = datasize;      	// 16-bit/32-bit data size transfers
	DmaRegs.CH2.MODE.bit.CHINTMODE = chintmode;		// Generate interrupt to CPU at beginning/end of transfer
	DmaRegs.CH2.MODE.bit.CHINTE = chinte;        	// Channel Interrupt to CPU enable

	// Clear any spurious flags:
	DmaRegs.CH2.CONTROL.bit.PERINTCLR = 1;  		// Clear any spurious interrupt flags
	DmaRegs.CH2.CONTROL.bit.SYNCCLR = 1;    		// Clear any spurious sync flags
	DmaRegs.CH2.CONTROL.bit.ERRCLR = 1; 	     	// Clear any spurious sync error flags

	// Initialize PIE vector for CPU interrupt:
	PieCtrlRegs.PIEIER7.bit.INTx2 = 1;              // Enable DMA CH2 interrupt in PIE

	EDIS;
}



// This function starts DMA Channel 2. 	
void StartDMACH2(void)
{
	EALLOW;
	DmaRegs.CH2.CONTROL.bit.RUN = 1;
	EDIS;
}



void DMACH3AddrConfig(volatile Uint16 *DMA_Dest,volatile Uint16 *DMA_Source)
{
	EALLOW;
	
	// Set up SOURCE address:
	DmaRegs.CH3.SRC_BEG_ADDR_SHADOW = (Uint32)DMA_Source;	// Point to beginning of source buffer
	DmaRegs.CH3.SRC_ADDR_SHADOW =     (Uint32)DMA_Source;

	// Set up DESTINATION address:
	DmaRegs.CH3.DST_BEG_ADDR_SHADOW = (Uint32)DMA_Dest;	    // Point to beginning of destination buffer
	DmaRegs.CH3.DST_ADDR_SHADOW =     (Uint32)DMA_Dest;

	
	EDIS;
}

void DMACH3BurstConfig(Uint16 bsize, int16 srcbstep, int16 desbstep)
{
	EALLOW;

	// Set up BURST registers:
	DmaRegs.CH3.BURST_SIZE.all = bsize;	                // Number of words(X-1) x-ferred in a burst
	DmaRegs.CH3.SRC_BURST_STEP = srcbstep;			    // Increment source addr between each word x-ferred
	DmaRegs.CH3.DST_BURST_STEP = desbstep;              // Increment dest addr between each word x-ferred


	EDIS;
}

void DMACH3TransferConfig(Uint16 tsize, int16 srctstep, int16 deststep)
{
	EALLOW;

		// Set up TRANSFER registers:
	DmaRegs.CH3.TRANSFER_SIZE = tsize;                  // Number of bursts per transfer, DMA interrupt will occur after completed transfer
	DmaRegs.CH3.SRC_TRANSFER_STEP = srctstep;			// TRANSFER_STEP is ignored when WRAP occurs
	DmaRegs.CH3.DST_TRANSFER_STEP = deststep;			// TRANSFER_STEP is ignored when WRAP occurs
	
	EDIS;
}

void DMACH3WrapConfig(Uint16 srcwsize, int16 srcwstep, Uint16 deswsize, int16 deswstep)
{
	EALLOW;
	
			// Set up WRAP registers:
	DmaRegs.CH3.SRC_WRAP_SIZE = srcwsize;				// Wrap source address after N bursts
    DmaRegs.CH3.SRC_WRAP_STEP = srcwstep;			    // Step for source wrap

	DmaRegs.CH3.DST_WRAP_SIZE = deswsize;				// Wrap destination address after N bursts
	DmaRegs.CH3.DST_WRAP_STEP = deswstep;				// Step for destination wrap
	
	EDIS;
}


void DMACH3ModeConfig(Uint16 persel, Uint16 perinte, Uint16 oneshot, Uint16 cont, Uint16 synce, Uint16 syncsel, Uint16 ovrinte, Uint16 datasize, Uint16 chintmode, Uint16 chinte)
{
	EALLOW;
	
	// Set up MODE Register:
	DmaRegs.CH3.MODE.bit.PERINTSEL = persel;	    // Passed DMA channel as peripheral interrupt source
	DmaRegs.CH3.MODE.bit.PERINTE = perinte;       	// Peripheral interrupt enable
	DmaRegs.CH3.MODE.bit.ONESHOT = oneshot;       	// Oneshot enable
	DmaRegs.CH3.MODE.bit.CONTINUOUS = cont;    		// Continous enable
	DmaRegs.CH3.MODE.bit.SYNCE = synce;         	// Peripheral sync enable/disable
	DmaRegs.CH3.MODE.bit.SYNCSEL = syncsel;       	// Sync effects source or destination
	DmaRegs.CH3.MODE.bit.OVRINTE = ovrinte;         // Enable/disable the overflow interrupt
	DmaRegs.CH3.MODE.bit.DATASIZE = datasize;      	// 16-bit/32-bit data size transfers
	DmaRegs.CH3.MODE.bit.CHINTMODE = chintmode;		// Generate interrupt to CPU at beginning/end of transfer
	DmaRegs.CH3.MODE.bit.CHINTE = chinte;        	// Channel Interrupt to CPU enable

	// Clear any spurious flags:
	DmaRegs.CH3.CONTROL.bit.PERINTCLR = 1;  		// Clear any spurious interrupt flags
	DmaRegs.CH3.CONTROL.bit.SYNCCLR = 1;    		// Clear any spurious sync flags
	DmaRegs.CH3.CONTROL.bit.ERRCLR = 1; 	     	// Clear any spurious sync error flags

	// Initialize PIE vector for CPU interrupt:
	PieCtrlRegs.PIEIER7.bit.INTx3 = 1;              // Enable DMA CH3 interrupt in PIE