clock.c

单片机时钟 单片机时钟

#include<AT89X51.h>
#include<math.h>
#define uchar unsigned char
sbit s=P2^5;
sbit m=P2^6;
sbit h=P2^7;
sbit start=P2^4;
uchar num,shi,fen,miao;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void timer0() interrupt 1
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	num++;
	if(num==20)
	{
		num=0;
		miao++;
		if(miao==60)
		{
			miao=0;
			fen++;
			if(fen==60)
			{
				fen=0;
				shi++;
				if(shi==24)
				{
					shi=0;
				}
			}
		}
	}
}
void delay(uchar z)
{
	uchar x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}
void display(uchar miao, uchar fen, uchar shi)
{
	uchar miao1,miao2,fen1,fen2,shi1,shi2;
	miao1=miao%10;
	miao2=miao/10;
	fen1=fen%10;
	fen2=fen/10;
	shi1=shi%10;
	shi2=shi/10;
	P1=0xfe;
	P0=table[miao1];
	delay(10);
	P1=0xfd;
	P0=table[miao2];
	delay(10);
	P1=0xfb;
	P0=0x40;
	delay(10);
	P1=0xf7;
	P0=table[fen1];
	delay(10);
	P1=0xef;
	P0=table[fen2];
	delay(10);
	P1=0xdf;
	P0=0x40;
	delay(10);
	P1=0xbf;
	P0=table[shi1];
	delay(10);
	P1=0x7f;
	P0=table[shi2];
	delay(10);
}
void main()
{
	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	ET0=1;
	EA=1;
	TR0=1;
	while(1)
	{
		if(s==0)
		{
			delay(5);
			if(s==0)
			{
				TR0=0;
				miao++;
				if(miao==60)
				 miao=0;
				while(!s);
				delay(5);
				while(!s);
			}
		}
		if(m==0)
		{
			delay(5);
			if(m==0)
			{
				TR0=0;
				fen++;
				if(fen==60)
					fen=0;
				while(!m);
				delay(5);
				while(!m);
			}
		}
		if(h==0)
		{
			delay(5);
			if(h==0)
			{
				TR0=0;
				shi++;
				if(shi==24)
					shi=0;
				while(!h);
				delay(5);
				while(!h);
			}
		}
		if(start==0)
		TR0=1;
		display( miao, fen, shi);
	}	
}