10-++٦

10内秒表程序

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
uchar count=0;	
uchar code tab[]={
0x3f,0x06,0x5b,0x4f,0x66,
0x6d,0x7d,0x07,0x7f,0x6f};//共阴数码管0123456789
sbit key1=P3^6;
sbit key2=P3^7;
uchar sec,flag,temp,i;
uchar state;
void delay(uchar z)
{
	uchar x;
	while(z--)
		for(x=120;x>0;x--);
}
void init()
{
	P0=0x3f;P2=0x3f;
	flag=0;
	state=1;
	sec=0;
	i=0;
	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	PX0=1; //设置优先级为INT0
	EA=1;
	EX0=1;
}
void main()
{
	init();
	while(1)
	{
		if(state!=key2)
		{
			delay(10);
			state=key2;
			//while(key2==0);
			if(state==0)
	 		 {
	 	 		delay(10);
				flag=(flag+1)%2;
	  			switch(flag)
				{
					case 0:
					EA=0;ET0=0;TR0=0;break;
					case 1:
					EA=1;ET0=1;TR0=1;break;
				}
			  }
		}
	}
}
void timer0() interrupt 1
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	if(++i==2)
	{
		i=0;
		++sec;
		P0=tab[sec/10];
		P2=tab[sec%10];
		if(sec==100)
			sec=0;
	}
}
void exter0() interrupt 0
{
	P0=0x3f;P2=0x3f;i=0;sec=0;
}