dma_init.c

基于adsp-bf533的异性纤维检测算法的实现

#include <cdefBF533.h>
#include <plx9054_bf533_test.h>

extern unsigned short *pWrite;
//////////////////////////////////////////////////////////
//  parameter : Addr -- DMA Sdram  Sdram Addr 
//  FPGA addr and the Length is static
//  
//////////////////////////////////////////////////////////
void SdramDMAFPGA(unsigned long  Addr)
{

   *pMDMA_S1_START_ADDR = Addr;
   *pMDMA_S1_CONFIG |= DMA_EN;
   *pMDMA_D1_CONFIG |= DMA_EN;
   
   
}
void L1DMASdram(unsigned long  SAddr,unsigned long  DAddr)
{

   *pMDMA_S0_START_ADDR = SAddr;
   *pMDMA_D0_START_ADDR = DAddr;
   *pMDMA_S0_CONFIG |= DMA_EN;
   *pMDMA_D0_CONFIG |= DMA_EN;
   
   
}

void Init_DMA(void)
{
/*	//Target address of the DMA
	*pDMA0_START_ADDR = 0x0;	

	//RAM_Length 32bit transfers will be executed
	*pDMA0_X_COUNT = RAM_Length;

	//The modifier is set to 2 because of the 16bit transfers
	*pDMA0_X_MODIFY = 0x2;	
														

	//PPI Peripheral is used
	*pDMA0_PERIPHERAL_MAP = 0x0;	
*/	
	//Mem DMA is used
	// Mem DMA can not be reassignable ,why set the default value to it ?
	
	*pMDMA_D1_PERIPHERAL_MAP = 0x0040;
	*pMDMA_S1_PERIPHERAL_MAP = 0x0040;
	

	// Configure MDMA0
	// 16-bit transfers, Interrupt on completion, Autobuffer mode
	//DMA Config:      Memory write DMA | enable assertation of interrupt | NDSIZE for stop mode | Enable STOP DMA
	
	*pMDMA_D1_CONFIG =  WNR | WDSIZE_16 | DI_EN ;//| FLOW_1; 
	// Start address of data buffer
	*pMDMA_D1_START_ADDR = pWrite;
	// DMA inner loop count
	*pMDMA_D1_X_COUNT = 4096;
	// Inner loop address increment
	*pMDMA_D1_X_MODIFY = 2;
	
	//DMA Config:      enable assertation of interrupt | NDSIZE for stop mode | Enable STOP DMA
	*pMDMA_S1_CONFIG =   WDSIZE_16 | DI_EN ;//| FLOW_1; 
	// Start address of data buffer
	//*pMDMA_S0_START_ADDR is empty
	// DMA inner loop count
	*pMDMA_S1_X_COUNT = 4096;
	// Inner loop address increment
	*pMDMA_S1_X_MODIFY = 2;
	
	*pMDMA_D0_PERIPHERAL_MAP = 0x0040;
	*pMDMA_S0_PERIPHERAL_MAP = 0x0040;
	

	// Configure MDMA0
	// 16-bit transfers, Interrupt on completion, Autobuffer mode
	//DMA Config:      Memory write DMA | enable assertation of interrupt | NDSIZE for stop mode | Enable STOP DMA
	
	*pMDMA_D0_CONFIG =  WNR | WDSIZE_16 | DI_EN ;//| FLOW_1; 
	// Start address of data buffer
	//*pMDMA_D0_START_ADDR = pWrite;
	// DMA inner loop count
	*pMDMA_D0_X_COUNT = 4096;
	// Inner loop address increment
	*pMDMA_D0_X_MODIFY = 2;
	
	//DMA Config:      enable assertation of interrupt | NDSIZE for stop mode | Enable STOP DMA
	*pMDMA_S0_CONFIG =   WDSIZE_16 | DI_EN ;//| FLOW_1; 
	// Start address of data buffer
	//*pMDMA_S0_START_ADDR is empty
	// DMA inner loop count
	*pMDMA_S0_X_COUNT = 4096;
	// Inner loop address increment
	*pMDMA_S0_X_MODIFY = 2;
	
		
	
	
	
	
	

}//end Init_DMA