dma.c

这是三星公司的arm7 s3c44b0x芯片的所有外设中断程序

//44BTEST : dma.c
/**********************************************************************
CAUTION: DMA operation is being done in cache-on state NOW.
So,some read value may be not same with real memory value
because of the cache. Users must fully consider the role of
cache after DMA has been being operated. It is the best way
using non-cacheable region in the memory area written by DMA.
**********************************************************************/
#include <string.h>
#include "..\inc\44b.h"
#include "..\inc\44blib.h"
#include "..\inc\def.h"
void Zdma0Int(int srcAddr,int dstAddr,int length,int dw);
void Zdma1Int(int srcAddr,int dstAddr,int length,int dw);
void __irq Zdma0Done(void);
void __irq Zdma1Done(void);
volatile int zdma0Done,zdma1Done;
void Test_Zdma0(void)
{
	unsigned char *src, *dst;
	int i;
	unsigned int memSum;
	rINTMSK=BIT_GLOBAL;
	pISR_ZDMA0=(int)Zdma0Done;
	Uart_Printf("[ZDMA0 MEM2MEM Test]\n");
	dst=(unsigned char *)malloc(0x80000);
	src=(unsigned char *)malloc(0x80000);
	rNCACHBE1=( ( (((unsigned)dst+0x100000)>>12) +1 )<<16 )|((unsigned)dst>>12);
	Uart_Printf("dst=%x,src=%x\n",(int)dst,(int)src);
	/* Copy by word */
	memSum=0;
	for(i=0;i<0x80000;i++)
		*(src+i)=0x1;
	Zdma0Int((int)src,(int)dst,0x80000,2); //word
	for(i=0;i<0x80000;i++)
		memSum+=*(dst+i);
	Uart_Printf("memSum=%8x:",memSum);
	if(memSum==0x80000)
		Uart_Printf("O.K.\n");
	else 
		Uart_Printf("ERROR!!!\n");
	/* Copy by half-word */
	memSum=0;
	for(i=0;i<0x80000;i++)
		*(src+i)=2;
	Zdma0Int((int)src,(int)dst,0x80000,1); //half-word
	for(i=0;i<0x80000;i++)
		memSum+=*(dst+i);
	Uart_Printf("memSum=%8x:",memSum);
	if(memSum==0x100000)
		Uart_Printf("O.K.\n");
	else 
		Uart_Printf("ERROR!!!\n");
	/* Copy by byte */
	memSum=0;
	for(i=0;i<0x80000;i++)
		*(src+i)=3;
	Zdma0Int((int)src,(int)dst,0x80000,0); //byte
	for(i=0;i<0x80000;i++)
		memSum+=*(dst+i);
	Uart_Printf("memSum=%8x:",memSum);
	if(memSum==0x180000)
		Uart_Printf("O.K.\n");
	else 
		Uart_Printf("ERROR!!!\n");
	free(src);
	free(dst);
}
void Test_Zdma1(void)
{
	unsigned char *src, *dst;
	int i;
	unsigned int memSum;
	rINTMSK=BIT_GLOBAL;
	pISR_ZDMA1=(int)Zdma1Done;
	Uart_Printf("[ZDMA1 MEM2MEM Test]\n");
	dst=(unsigned char *)malloc(0x80000);
	src=(unsigned char *)malloc(0x80000);
	rNCACHBE1=( ( (((unsigned)dst+0x100000)>>12) +1 )<<16 )|((unsigned)dst>>12);
	/* Copy by word */
	memSum=0;
	for(i=0;i<0x80000;i++)
		*(src+i)=1;
	Zdma1Int((int)src,(int)dst,0x80000,2); //word
	for(i=0;i<0x80000;i++)
		memSum+=*(dst+i);
	Uart_Printf("memSum=%8x:",memSum);
	if(memSum==0x80000)
		Uart_Printf("O.K.\n");
	else 
		Uart_Printf("ERROR!!!\n");
	/* Copy by half-word */
	memSum=0;
	for(i=0;i<0x80000;i++)
	*(src+i)=2;
	Zdma1Int((int)src,(int)dst,0x80000,1); //half-word
	for(i=0;i<0x80000;i++)
		memSum+=*(dst+i);
	Uart_Printf("memSum=%8x:",memSum);
	if(memSum==0x100000)
		Uart_Printf("O.K.\n");
	else 
		Uart_Printf("ERROR!!!\n");
	/* Copy by byte */
	memSum=0;
	for(i=0;i<0x80000;i++)
		*(src+i)=3;
	Zdma1Int((int)src,(int)dst,0x80000,0); //byte
	for(i=0;i<0x80000;i++)
		memSum+=*(dst+i);
	Uart_Printf("memSum=%8x:",memSum);
	if(memSum==0x180000)
		Uart_Printf("O.K.\n");
	else
		Uart_Printf("ERROR!!!\n");
	free(src);
	free(dst);
}
void Zdma0Int(int srcAddr,int dstAddr,int length,int dw)
//returns the checksum
{
	int time;
	zdma0Done=0;
	rINTMSK=~(BIT_GLOBAL|BIT_ZDMA0);
	rZDISRC0=srcAddr|(dw<<30)|(1<<28); // inc
	rZDIDES0=dstAddr|( 2<<30)|(1<<28); // inc
	rZDICNT0=length |( 2<<28)|(1<<26)|(3<<22)|(0<<20);
	rZDICNT0 |= (1<<20);//after ES3
	//whole,unit transfer,int@TC,enable DMA
	rZDCON0=0x1; // start!!!
	Timer_Start(3);//128us resolution
	while(zdma0Done==0);
	time=Timer_Stop();
	Uart_Printf("ZDMA0 %8x->%8x,%x:time=%f\n",srcAddr,dstAddr,length,time*128E-6);
	rINTMSK=BIT_GLOBAL;
}
void Zdma1Int(int srcAddr,int dstAddr,int length,int dw)
//returns the checksum
{
	int time;
	zdma1Done=0;
	rINTMSK=~(BIT_GLOBAL|BIT_ZDMA1);
	rZDISRC1=srcAddr|(dw<<30)|(1<<28); // inc
	rZDIDES1=dstAddr|( 2<<30)|(1<<28); // inc
	rZDICNT1=length |( 2<<28)|(1<<26)|(3<<22)|(0<<20);
	rZDICNT1 |= (1<<20);//after ES3
	//whole,unit transfer,int@TC,enable DMA
	rZDCON1=0x1; // start!!!
	Timer_Start(3);//128us resolution
	while(zdma1Done==0);
	time=Timer_Stop();
	Uart_Printf("ZDMA1 %8x->%8x,%x:time=%f\n",srcAddr,dstAddr,length,time*128E-6);
	rINTMSK=BIT_GLOBAL;
}
void __irq Zdma0Done(void)
{
	rI_ISPC=BIT_ZDMA0; //clear pending
	//rI_ISPC; //is needed only when cache=on & wrbuf=on & BSFRD=0
	zdma0Done=1;
}
void __irq Zdma1Done(void)
{
	rI_ISPC=BIT_ZDMA1; //clear pending
	//rI_ISPC; //is needed only when cache=on & wrbuf=on & BSFRD=0
	zdma1Done=1;
}