#include<at89x51.h>

char lcd[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
char lcd2[]={0x00,0x01,0x02,0x03,0x04};
int unit_num,ten_num,cen_num,mill_num,tent_num;//個十百千萬位數
unsigned int i=1000;
void lcd_display();

void DelayX10ms(int count);
void seg_display();
void delay();

unsigned long j=10000;
unsigned int n,sec;



void main()
{
   sec=n=0;
   TMOD=0X01;
	TH0=(65536-1000)/256;
	TL0=(65536-1000)%256;
	EA=1;
	ET0=1;
  
	TR0=1;
    

 while(1)

  { }
 }




void seg_display()
{
  	        ///萬位    
  P1=lcd2[0];  
  P2=lcd[tent_num];
  DelayX10ms(50);

  	        //千位
  P1=lcd2[1];
  P2=lcd[mill_num];
  DelayX10ms(50);

 			 //百位 
  P1=lcd2[2];
  P2=lcd[cen_num];
 
  DelayX10ms(50);
  
  			  //十位	
  P1=lcd2[3];
  P2=lcd[ten_num];
  DelayX10ms(50);
	
 			  //個位	
  P1=lcd2[4];
  P2=lcd[unit_num];
  DelayX10ms(50);	
}  	


   


void DelayX10ms(int count)
{
  int m,n;

  for(m=0;m<count;m++)
    for(n=0;n<1;n++);
}

void timer0_int(void)interrupt 1

{

	TH0=(65536-1000)/256;
	TL0=(65536-1000)%256;
	 n++;
	 j--;
	 if(j==0)
	  j=0;
	 
     if(n==2000)
	  {
	   n=0;
	   
	  TR0=0; 
	   
		}
		tent_num =  j/10000;						//萬位 
  
        mill_num = (j%10000)/1000;					//千位  
  
        cen_num= ((j%10000)%1000)/100;				//百位  
  
        ten_num= (((j%10000)%1000)%100)/10; 		//十位  
  
        unit_num = (((j%10000)%1000)%100)%10; 		//個位
        seg_display();
		

}