mdma_exp.c

来自「FIR IIR 实验的源代码」· C语言 代码 · 共 75 行

#include <cdefBF561.h>
#include <ccblkfn.h>
#include <sys/exception.h>

#include <string.h>

#include "Exp_Config.h"
#include "sys_func.h"

#define DATA_LEN	(2000)

unsigned short Src_Buf[DATA_LEN];
unsigned short Dest_Buf[DATA_LEN];

int nResult=0;
int nCopyOver=0;

void MEM_DMA_Copy(void)
{
    int i;
    nCopyOver=0;
    for(i=0;i<DATA_LEN;i++)
	{
		Src_Buf[i] = i;
		Dest_Buf[i] = 0;
	}
	
	*pMDMA1_D0_START_ADDR = Dest_Buf;
	*pMDMA1_D0_X_COUNT = (DATA_LEN>>1);
	*pMDMA1_D0_X_MODIFY = 2;

	*pMDMA1_S0_START_ADDR = Src_Buf;
	*pMDMA1_S0_X_COUNT = (DATA_LEN>>1);
	*pMDMA1_S0_X_MODIFY = 2;

	*pMDMA1_D0_PERIPHERAL_MAP = 0x0040;
	*pMDMA1_S0_PERIPHERAL_MAP = 0x0040;
	
	*pMDMA1_S0_CONFIG = 0x0025;
	*pMDMA1_D0_CONFIG = 0x00a7;		
}

EX_INTERRUPT_HANDLER(MDMA_ISR)
{  	
	*pMDMA1_D0_IRQ_STATUS=0x1;
    nCopyOver=1;
    nResult=memcmp(Src_Buf,Dest_Buf,DATA_LEN);
}

void Init_MDMA_Interrupt(void)
{
	*pSICB_IAR6 = ((*pSICB_IAR6)&0xff0fffff)|(1<<20);
	register_handler(ik_ivg8, MDMA_ISR);
	*pSICB_IMASK1 |= (1<<21);    	
}

void MDMA_Exp(void)
{
	Init_MDMA_Interrupt();
    MEM_DMA_Copy();
	while (1)
    {
    	if (nCopyOver==0)
    	{
    	    SetLED(0x3C);
    	}else{
    	    if (nResult==0){
    	        SetLED(0xff);
    	    }else{
    	        SetLED(0x0);
    	    }
    	}
    }    
}