#include <reg52.h>  #include <reg52.h>
typedef  unsigned int  U16;
typedef  unsigned char  U8;
U8 num[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,
         0x82,0xF8,0x80,0x90,0x7f,0xFF};
sbit LED3=P1^3;
sbit LED2=P1^2;
sbit LED1=P1^1;
sbit LED0=P1^0;
    sbit P14=P1^4;
U8 shuma[4]={0};
void T0_Init()
{         
TMOD=0x10;
TH1=0xFC;
TL1=0x18;
TR1=1;
}
void refresh()
{
 U8 j,flag =0;
 static  U8 t=0;


for (j=3;j>1;j--)
{
 
flag=flag|shuma[j];
if(0==flag)
shuma[j]=11;
 
}
 switch(t)
  {
  case 0:LED0=0;LED1=1;LED2=1;LED3=1;P0=num[shuma[3]];t++;break;
  case 1:LED0=1;LED1=0;LED2=1;LED3=1;P0=num[shuma[2]];t++;break;
  case 2:LED0=1;LED1=1;LED2=0;LED3=1;P0=num[10];t++;break;
  case 3:LED0=1;LED1=1;LED2=0;LED3=1;P0=num[shuma[1]];t++;break;
  case 4:LED0=1;LED1=1;LED2=1;LED3=0;P0=num[shuma[0]];t=0;break;
  default:break;
  }
}
void main()
 {
U8 j=0;
U16 n=0,
    x=0;
   int sum=150;
     T0_Init();
while(1)
{  
  if(1==TF1)
  {
        TF1=0;
TH1=0xFC;
TL1=0x18;
n++;
refresh();
  }
 if(100==n)
 {  
   sum--;
shuma[0] =sum%10;
shuma[1] = sum/10%10;
shuma[2] =sum/100%10;
shuma[3] =sum/1000%10; n=0;
  }
if(100==sum){ P14=0;}
if(50==sum){P14=1;}
if(0==sum)
sum++;
}  
   
  }