first_dma.c

在TI的C6000系列高速DSP下实现对FLAH芯片的读写

#include <regs.h>
#include <intr.h>     
#include <dma.h>      
#pragma CODE_SECTION(First_DMA, ".First_DMA")
void First_DMA()                             
{   
	unsigned int *DM;		
	DM = (unsigned int*)0x01800004;
	*DM = 0xffff3f03;
	{
		DMA0_SRC_ADDR = (unsigned int)0x01408000;
		DMA0_DEST_ADDR = (unsigned int)0x8000;
		DMA0_SECONDARY_CTRL=0x80;
		DMA0_XFER_COUNTER=0x2000;  
	/*	DMA_GNDX_A = 0x4;*/
		DMA0_PRIMARY_CTRL=0x02000051; 		
WaitP:	if(DMA0_XFER_COUNTER != 0) goto WaitP;
	}
    
/*		DMA0_SRC_ADDR = (unsigned int)0x80000000;
		DMA0_DEST_ADDR = (unsigned int)0x00008000;
		DMA0_SECONDARY_CTRL=0x80;
		DMA0_XFER_COUNTER=0x2000;
		DMA0_PRIMARY_CTRL=0x02000051; 		 	                               
WaitP: if(DMA0_XFER_COUNTER != 0) goto WaitP;
*/	{
		DMA0_SRC_ADDR = (unsigned int)0x01410004;
		DMA0_DEST_ADDR = (unsigned int)0x80000000;
		DMA0_SECONDARY_CTRL=0x80;
		DMA0_XFER_COUNTER=0x3fff;  
		/*DMA_GNDX_A = 0x04;*/
		DMA0_PRIMARY_CTRL=0x02000051; 		
WaitAll:	if(DMA0_XFER_COUNTER != 0) goto WaitAll;
	}   

}