1 #include
     
       2 #define uchar unsigned char 3 #define uint unsigned int 4     uint i; 5    uint h=0,m=0,f=0,t4ms=0; 6 void init() 7 { 8     TMOD = 0x01; 9     TH0 = (65535-50000)/256;10     TL0 = (65535-50000)%256;11       ET0 = 1;12     EA = 1;13     TR0 = 1;14 }15 void delay(uint j){16     while(j--);17 }18 uchar  duan[10]={
    0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};19 uint  wei[8]={
    0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};20 void main()21 {22    init();23    while(1)24    {25        for(i=0;i<8;i++)26        {27              P1=wei[i];28           switch(i)29           {30             case 0:P2=duan[h/10];break;31               case 1:P2=duan[h%10];break;32               case 2:P2=0x40;break;33             case 3:P2=duan[f/10];break;34               case 4:P2=duan[f%10];break;35               case 5:P2=0x40;break;36               case 6:P2=duan[m/10];break;37               case 7:P2=duan[m%10];break;38               default:break;39           }40             delay(30);41         }42     }      43 }44 void ljj() interrupt 145 {46        t4ms++;47           if(t4ms==13)48           {49              t4ms=0;50                m++;51              if(m==60)52              {53                m=0;54                f++;55                if(f==60)56                {57                   f=0;58                   h++;59                   if(h==12)60                   {61                      h=0;62                   }63                }64              }65           }66     67 }68