int123.c

教你学习arm,自己慢慢消化吧

#include<stdio.h>
#include<lpc213x.h>

typedef unsigned char uint8;
typedef unsigned long uint32;

//#define CON 0x000000ff
uint8 temp=0x00;


void __irq eint0(void)
	{
	temp++;
	while(EXTINT&(1<<0))
		EXTINT=1<<0;
	IOCLR0=0xff;
	IOSET0=temp;
	VICVectAddr=0;
}


void __irq eint1(void)
	{
	temp--;
	while(EXTINT&(1<<1))
		EXTINT=1<<1;
	IOCLR0=0xff;
	IOSET0=temp;
	VICVectAddr=0;
}


void __irq eint2(void)
	{
	temp=0;
	while(EXTINT&(1<<2))
		EXTINT=1<<2;
	IOCLR0=0xff;
	IOSET0=temp;
	VICVectAddr=0;
}

int  main(void)
	{
	PINSEL0=0xa0000000;
	PINSEL1=0x00000001;
	IODIR0=0xff;
	IOCLR0=0xff;
	IOSET0=temp;
	VICIntSelect=0;
	VICIntEnable=0x0001c000;
	VICVectCntl0=0x0000002e;
	VICVectCntl1=0x0000002f;
	VICVectCntl2=0x00000030;
	VICVectAddr0=(int)eint0;
	VICVectAddr1=(int)eint1;
	VICVectAddr2=(int)eint2;
	EXTINT=0x07;
	while(1);
}