dma_config.c

程序主要为用ADI的BF533的图像采集模块

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

(C) Copyright 2006 - Analog Devices, Inc.  All rights reserved.

File Name:	DMA_Config.c

Date Modified:	10/25/04		Rev 0.2

Software:       VisualDSP++4.5

Hardware:		ADSP-BF533 EZ-KIT Board

Special Connections:  None

Purpose:		The file sets up the DMA transfer
				
				

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


#include <cdefBF533.h>
#define Line_Length 720
#define Frame_Length 576



void Init_DMA(void)
{

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

	//Line_Length 16bit transfers will be executed
	*pDMA0_X_COUNT = 720;//Line_Length;

	//The modifier is set to 2 because of the 16bit transfers
	*pDMA0_X_MODIFY = 0x2;//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;//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_DMA_To_DMA(void)
{


	*pMDMA_D0_START_ADDR = 0x140000;	

	*pMDMA_D0_X_COUNT = 720;

	*pMDMA_D0_X_MODIFY = 0x4;
	
	*pMDMA_D0_Y_COUNT = 576/2;

	*pMDMA_D0_Y_MODIFY = 0x4;
	
	*pMDMA_S0_START_ADDR = 0x00000;	
		
	*pMDMA_S0_X_COUNT = 720;

	*pMDMA_S0_X_MODIFY = 0x4;
											
	*pMDMA_S0_Y_COUNT = 576/2;

	*pMDMA_S0_Y_MODIFY = 0x4;
	
	
	//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
	*pMDMA_S0_CONFIG = DMAEN | DI_EN | WDSIZE_32| DMA2D | RESTART | DI_EN;
	*pMDMA_D0_CONFIG = DMAEN | DI_EN | WNR | WDSIZE_32 | DMA2D | RESTART | DI_EN;

}//end Init_DMA
void Init_DMA_To_DMA2(void)
{


	*pMDMA_D0_START_ADDR = 0x140000;	

	*pMDMA_D0_X_COUNT = 720/2;

	*pMDMA_D0_X_MODIFY = 4;
	
	*pMDMA_D0_Y_COUNT = 288;

	*pMDMA_D0_Y_MODIFY = 720*2+4;
	
	*pMDMA_S0_START_ADDR = 0x00000;	
		
	*pMDMA_S0_X_COUNT = 720/2;

	*pMDMA_S0_X_MODIFY = 4;
											
	*pMDMA_S0_Y_COUNT = 288;

	*pMDMA_S0_Y_MODIFY = 4;
	
	
	//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
	*pMDMA_S0_CONFIG = DMAEN | DI_EN | WDSIZE_32| DMA2D | RESTART | DI_EN;
	*pMDMA_D0_CONFIG = DMAEN | DI_EN | WNR | WDSIZE_32 | DMA2D | RESTART | DI_EN;

}//end Init_DMA
void Init_DMA_To_DMA3(void)
{


	*pMDMA_D0_START_ADDR = 0x140000+720*2;	

	*pMDMA_D0_X_COUNT = 720/2;

	*pMDMA_D0_X_MODIFY = 4;
	
	*pMDMA_D0_Y_COUNT = 288;

	*pMDMA_D0_Y_MODIFY = 720*2+4;
	
	*pMDMA_S0_START_ADDR = 0x00000+720*2*288;	
		
	*pMDMA_S0_X_COUNT = 720/2;

	*pMDMA_S0_X_MODIFY = 0x4;
											
	*pMDMA_S0_Y_COUNT = 288;

	*pMDMA_S0_Y_MODIFY = 4;
	
	
	//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
	*pMDMA_S0_CONFIG = DMAEN | DI_EN | WDSIZE_32| DMA2D | RESTART | DI_EN;
	*pMDMA_D0_CONFIG = DMAEN | DI_EN | WNR | WDSIZE_32 | DMA2D | RESTART | DI_EN;

}//end Init_DMA