dma_config.c

使用Usb cy7c68013与DSP通信

/******************************************************************************/
//
// Name: 	BF533 EZ-KIT DMA Setup
//
/******************************************************************************

(C) Copyright 2003 - Analog Devices, Inc.  All rights reserved.

File Name:	SDRAM_Config.c

Date Modified:	10/25/04		TL		Rev 0.2

Software:       VisualDSP++3.1

Hardware:		ADSP-BF533 EZ-KIT Board

Special Connections:  None

Purpose:		The file sets up the DMA transfer
				
				

*********************************************************************************/

#include <services/services.h>
#include <cdefBF533.h>
#include "ezkitutilities.h"
#define Line_Length 720
#define Frame_Length 525

//#define BUFFERS					1			// number of descriptors in the chain (limited only by memory)
#define DMA_PPI_ID ADI_DMA_DMA0
//#define SourcePeripheralID ADI_DMA_MDMA_S0
//#define DestPeripheralID ADI_DMA_MDMA_D0

// storage for interrupt manager data
static u8 IntMgrData[(ADI_INT_SECONDARY_MEMORY)];	
static ADI_DMA_DESCRIPTOR_LARGE		SourceBuffers;

#define SDRAM_DATA_START		0x00000000	// We use SDRAM data starting at this address
#define SOURCE_DATA_START		SDRAM_DATA_START
#define DESTINATION_DATA_START	(SDRAM_DATA_START + (BUFFERS * ELEMENTS * BYTES_PER_ELEMENT))
// DMA Manager data (base memory + memory for 2 DMA channel)
static u8 DMAMgrData[ADI_DMA_BASE_MEMORY + (ADI_DMA_CHANNEL_MEMORY * 2)];

#define StartAddr_1 ((volatile unsigned short *)0x00000000)
extern int TransFlag=1; 
volatile unsigned short pStartAddr_1=StartAddr_1;

//#include "flashsetup.h"
 
 
/* 
void Init_DMA(void)
{

	//Target address of the DMA
	*pDMA0_START_ADDR = 0x0;	

	//Line_Length 16bit transfers will be executed
	*pDMA0_X_COUNT = Line_Length;

	//The modifier is set to 2 because of the 16bit transfers
	*pDMA0_X_MODIFY = 0x2;	
														
	//Frame_Length 16bit transfers will be executed
	*pDMA0_Y_COUNT = Frame_Length;

	//The modifier is set to 2 because of the 16bit transfers
	*pDMA0_Y_MODIFY = 0x2;	

	//PPI Peripheral is used
	*pDMA0_PERIPHERAL_MAP = 0x0;	
	
	//DMA Config: Enable DMA | Memory write DMA | 2-D DMA | Discard DMA FIFO before start | enable assertation of interrupt | NDSIZE for stop mode | Enable STOP DMA
	*pDMA0_CONFIG = DMAEN | DI_EN | WNR | WDSIZE_16| DMA2D | RESTART | DI_EN;	
	

}//end Init_DMA

 

void Init_ADV(void)
{
	unsigned char tempReg;
	
	//De-assert the ADV7183 reset and link the ADV7183 Clock "LLC1" to the Blackfin PPI 
	//clock input.
	tempReg = *pFlashA_PortA_Out;
	*pFlashA_PortA_Out = tempReg | RST_7183 | PPICLK_ADV7183_SELECT;


	//Setup the Blackfin PF registers
	
	if ( ((*pDSPID) & 0xFFFF) < 0x2 ) {		// Workaround for anomaly ID# 05000079 for rev 0.1
		tempReg = *pFIO_INEN;
		*pFIO_INEN = tempReg | ADV7183_OE;
	 }
	//Blackfin PF2 pin must be set as output
	tempReg = *pFIO_DIR;
	*pFIO_DIR = tempReg | ADV7183_OE;

	//Set the Blackfin pin PF2 to output enable the ADV7183 data bus		
	tempReg = *pFIO_FLAG_C;
	*pFIO_FLAG_C = tempReg | ADV7183_OE;


}//end Init_ADV

*/
 
void DMA0_PPI_ISR(void)	// <--|declaration in  exception.h -->
{	
    
    int nBytes;	
	int i = 1;
	int j=2;
	volatile unsigned short * p;								//    |declaration with _pragma(interrupt) the ISR Startaddress 

	//disable the interrupt request
 	*pDMA0_IRQ_STATUS = 0x1;
 	*pSIC_IMASK=0x00000000;	
	printf( "\nThe DMA0 PPI Interrupt has been entered!\n" );

	nBytes=720*525;
	
//	p=StartAddr_1;
	
 //   Trans_Ram(pStartAddr_1,nBytes,TransFlag);
	
//	printf( "\nThe DMA0 PPI Interrupt has been finished!\n" );
    *pSIC_IMASK=0x00080000;	
}   //end DMA0_PPI_ISR
 

void Init_DMA(void)
{  
   	u32 ResponseCount;
	u16 Count;
	
	ADI_DMA_CONFIG_REG DMA_ConfigReg;
	ADI_DMA_CONFIG_REG DestConfigReg;
 
	ADI_DMA_MANAGER_HANDLE DMAHandle;

	ADI_DMA_CHANNEL_HANDLE ChanHandlePPI;
	ADI_DMA_CHANNEL_HANDLE ChanHandleDest;
	
    ezErrorCheck(adi_dma_Init(DMAMgrData, sizeof(DMAMgrData), &ResponseCount, &DMAHandle, NULL));
    
    ezErrorCheck(adi_dma_Open(DMAHandle, DMA_PPI_ID, NULL, &ChanHandlePPI, ADI_DMA_MODE_SINGLE, NULL,DMA0_PPI_ISR));
    DMA_ConfigReg.b_DI_EN=1;                       //interrupt
    DMA_ConfigReg.b_WNR=1;                         //direction =1 write into memory 
    DMA_ConfigReg.b_DMA2D =1;                      //2D
   // DMA_ConfigReg.b_RESTART=1;
    DMA_ConfigReg.b_RESTART=1;
    SourceBuffers.StartAddress=SOURCE_DATA_START;
 //	SourceBuffers[i].StartAddress = (void *)(SOURCE_DATA_START * i * ELEMENTS * BYTES_PER_ELEMENT);			//SDRAM
	SourceBuffers.Config  = DMA_ConfigReg;					// the config register we set up earlier
	SourceBuffers.XCount  = Line_Length;
	SourceBuffers.XModify = 0x2;                    //16bits transfer
	SourceBuffers.YCount  = Frame_Length;						// this is for 2-dimensional DMA only
	SourceBuffers.YModify = 0x2;						// this is for 2-dimensional DMA only
	
   	ezErrorCheck(adi_dma_Buffer (ChanHandlePPI,SourceBuffers.StartAddress,SourceBuffers.Config,SourceBuffers.XCount,SourceBuffers.XModify,SourceBuffers.YCount,SourceBuffers.YModify ));

    ezErrorCheck(adi_dma_Control(ChanHandlePPI, ADI_DMA_CMD_SET_DATAFLOW, (void *)TRUE));
//	ezErrorCheck(adi_dma_Open(DMAHandle, DestPeripheralID, NULL, &ChanHandleDest, ADI_DMA_MODE_SINGLE, NULL, NULL));
}