main.c

单片机外部中断检测程序！！！ 开发环境：keilC 用于检测外部中断

#include<reg52.h>

sbit S1=P2^4;
sbit S2=P2^5;
sbit S3=P2^6;

sbit LED1=P1^0;
sbit LED2=P1^1;
sbit LED3=P1^2;
sbit LED=P0^0;

bit flag_1=0,flag_2=0;

void service_int0() interrupt 1 using 1
{
	flag_1=1;	
}

void service_int1() interrupt 2 using 2
{
	flag_2=1;		
}

void dlxms(unsigned int x)
{
	unsigned char j;
	while(x--)
	{
		for(j=0;j<125;j++)
		{;}
	}	
}

void ck_ini()
{
	TMOD=0x20;
	TL1=0xfd;
	TH1=0xfd;
	SCON=0xd8;
	PCON=0x00;	
}

void ck_send(unsigned int sd_data)
{	
	unsigned char sd[2],i;
	TR1=1;
	sd[0]=(unsigned char)sd_data;
	sd[1]=(unsigned char)(sd_data>>8);
	for(i=0;i<2;i++)
	{
		SBUF=sd[i];
		while(TI==0);
		TI=0;	
	}
}

void main(void)
{
	IP=0x00;
	IE=0x85;
	ck_ini();
	LED=0;
	
	while(1)
	{
		if(flag_1)
		{
			if(S1==0)
			{
				dlxms(5);
				if(S1==0)
				{
					dlxms(5);
					if(S1==0)
					{
						LED1=!LED1;
						LED2=1;
						LED3=1;
						ck_send(0x0033);
					}
				}
			}
		}
		if(flag_2)
		{
			if(S2==0)
			{
				dlxms(10);
				if(S2==0)
				{
					dlxms(10);
					if(S2==0)
					{
						LED1=1;
						LED2=!LED2;
						LED3=1;
						ck_send(0x0044);
					}
				}
			}
			if(S3==0)
			{
				dlxms(10);
				if(S3==0)
				{
					dlxms(10);
					if(S3==0)
					{
						LED1=1;
						LED2=1;
						LED3=!LED3;
						ck_send(0x0055);
					}
				}
			}
		}
		flag_1=0;flag_2=0;
	}
}