#include<reg52.h>
#define	uint unsigned int;
#define uchar unsigned char;
uchar bai,shi,ge,temp,tt;

sbit duan=P2^6;
sbit wei=P2^7;

uchar code Num_code[]={ //顯示數據編碼
0xc0,0xF9,0xA4,0xB0,0x99,//0-4
0x92,0x82,0xF8,0x80,0x90};//5-9
 void delay(unsigned int z)
{
	unsigned int x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}

void display(unsigned char bai,unsigned char shi,unsigned char ge)
{
  
	P0=0x20;
	    wei=1;
		wei=0;
		P0=Num_code[ge];
		duan=1;
		duan=0;
	//	delay(1);
	
		 			
P0=0x10;
	    wei=1;
		wei=0;
		P0=Num_code[shi];
		duan=1;
		duan=0;
	//	delay(1);


P0=0x08;
	    wei=1;
		wei=0;
		P0=Num_code[bai];
		duan=1;
		duan=0;
		//delay(1);

 }
  void main()
  {	   
	tt=0;
  	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	EA=1;//開總中斷
	ET0=1;//允許timer0中斷
	TR0=1;//啟動timer0
  	  while(1)
	{	   //	P0=0xff;	
		P1=0xef;
		temp=P1;
		temp=temp&0x0f;  
		if(temp!=0x0f)
		{
			temp=P1;
			switch(temp)
			{
				case 0xee:bai=0;shi=0;ge=0;break;
				case 0xed:bai=0;shi=0;ge=1;break;
				case 0xeb:bai=0;shi=0;ge=4;break;
				case 0xe7:bai=0;shi=0;ge=9;break;
			}
		display(bai,shi,ge);

		}
		P1=0xdf;
		temp=P1;
		temp=temp&0x0f;  
		if(temp!=0x0f)
		{
			temp=P1;
			switch(temp)
			{
				case 0xde:bai=0;shi=1;ge=6;break;
				case 0xdd:bai=0;shi=2;ge=5;break;
				case 0xdb:bai=0;shi=3;ge=6;break;
				case 0xd7:bai=0;shi=4;ge=9;break;
			}
		  display(bai,shi,ge);

		}


  }
}
   void timer0() interrupt 1
   {
   
    TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	tt++;
   }