interrupt.c

2440 中断实例 按键盘键点亮LED灯

#include "s3c2440.h"

void EINT_Handle(void)
{
	unsigned long oft = INTOFFSET;
	unsigned long val = 0;
	unsigned long eintpend8  = (EINTPEND >> 8) & 1;
	unsigned long eintpend11  =(EINTPEND >> 11) & 1;
	unsigned long eintpend13 =(EINTPEND >> 13) & 1;
	unsigned long eintpend14  =(EINTPEND >> 14) & 1;

	if(oft == 5 )
	{
	   if (eintpend8)
	   {//led1 light
			GPBDAT |= (0xf<<5);
			GPBDAT &=  ~(1<<5) ;

			EINTPEND &= ~(1<<8) ;
	   }
	   if (eintpend11)
	   {
			GPBDAT |= (0xf<<5);
			GPBDAT &=  ~(1<<6) ;

			EINTPEND &= ~(1<<11) ;
	   }
	   if (eintpend13)
	   {
			GPBDAT |= (0xf<<5);
			GPBDAT &=  ~(1<<7) ;

			EINTPEND &= ~(1<<13) ;
	   }
	   if (eintpend14)
	   {
			GPBDAT |= (0xf<<5);
			GPBDAT &=  ~(1<<8) ;

			EINTPEND &= ~(1<<14) ;
	   }	 
	 }
	//clear interrupter
	 SRCPND &= ~(1<<5);
	INTPND &= ~(1<<5);
	
	}