test_irq.c

arm开发的一些小实验,开发工具ads1.2,multi-ice,实验开发板 s3c2410

#include <stdio.h>
#include "Option.h"
#include "Def.h"
#include "2410addr.h"

int irqcount = 0;

static void haha(int offset)
{

	rSRCPND =0x00000010;  //ENT4_7 requested
	rEINTPEND = 0x00000020;//ENT5  Requested
	rINTPND = rINTPND;//  ?????
	
	
	rSRCPND =0x00000010;
	rEINTPEND = 0x00000020;
	rINTPND = rINTPND;
	irqcount++;
	printf("irqcount = %d\n",irqcount);
}


static void __irq IrqHandler(void)
{
	int offset;
	
	offset	=	rINTOFFSET;
	haha(offset);
}

void Main(void)
{

	pISR_IRQ 	= 	(unsigned)IrqHandler;


	//GPIO
	rGPFCON		&=	~(0x3<<10);//
	rGPFCON		|=	(0x2<<10);//使用	ENT5,[11:10]=10
	rEXTINT0	&=	~(0x00600000);
	rEXTINT0	|=	0x00200000;//ENT5 ,[22:20]=010;下降沿触发
	
//	rEXTINT0	|=	0x00018000;
	rGPFUP		=	0x0;  //上拉功能无效

	rINTMOD		=	0x0;  //IRQ模式
	
	rINTMSK		&=	~(0x00000010);  //EINT4_7可用
	
	rEINTMASK	&=	~(0x00000020);	//EINT5可用


  
}