這是兩塊C51芯片控制的程序  第一塊是鬧鐘計時器：

代碼：

#include <at89x51.h>
unsigned char a[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned char b[6]={0x7e,0x7d,0x7b,0x77,0x6f,0x5f};
unsigned char c[6]={5,5,9,5,8,0};
unsigned char d[6]={0,0,0,0,9,0};
unsigned char i,f,r,j=0x0f,k=0,x=0;
unsigned char s=55,m=59,h=8;
unsigned char ns=0,nm=0,nh=9;
void main(void)
{TMOD=0x01;
TH0=15536/256;
TL0=15536%256;
EA=0x01;
ET0=0x01;
TR0=0x01;
while(1)
{if(P1_3==0){j=~j;while(P1_3==0);}
switch(j)
{ case 0xf0:
for(x=0;x<6;x++)
{P3=b[x];
 P2=a[d[x]];
for(i=0;i<255;i++) ;
 switch(P1)
  { case 0xfe:ns=ns+1;if(ns==60) {ns=0;} while(P1_0==0);break;
 case 0xfd:nm=nm+1;if(nm==60) {nm=0;} while(P1_1==0);break;
    case 0xfb:nh=nh+1;if(nh==24) {nh=0;} while(P1_2==0);break;
  } 
}
break;

   case 0x0f:    
   for(x=0;x<6;x++)
   { P3=b[x];
   P2=a[c[x]];
   for(i=0;i<255;i++);
   switch(P1)
   { case 0xfe:s=s+1;if(s==60) {s=0;} while(P1_0==0);break;
  case 0xfd:m=m+1;if(m==60) {m=0;} while(P1_1==0);break;
     case 0xfb:h=h+1;if(h==24) {h=0;} while(P1_2==0);break;
   }     
   }
   break;  
}
}
}
 
void zd(void) interrupt 1
{TH0=0x01;
TL0=0x01;
  k=k+1;
    if(k==20)      
      {k=0;s=s+1;
         if(s==60) 
             {s=0;m=m+1;
      if(m==60)
      {m=0;h=h+1;
                if(h==24)
                     {h=0;}
                }
          }   }
if(s==ns&&m==nm&&h==nh)
   {P3_7=~P3_7;      
    for(f=0;f<80;f++)
    {
  
  for(i=0;i<255;i++);
  for(r=0;r<255;r++);
     }
   }    
c[0]=s%10;c[1]=s/10;
c[2]=m%10;c[3]=m/10;
c[4]=h%10;c[5]=h/10;
d[0]=ns%10;d[1]=ns/10;
d[2]=nm%10;d[3]=nm/10;   
d[4]=nh%10;d[5]=nh/10;
 }

 

第二塊是加延時的LED燈程序：

代碼：

#include<at89x51.h>
#define uchar unsigned char
#define uint unsigned int

uchar code Pattern_P0[]=
{
0xfc,0xf9,0xf3,0xe7,0xcf,0x9f,0x3f,0x7f,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xe7,0xdb,0xbd,0x7e,0xbd,0xdb,0xe7,0xff,0xe7,0xc3,0x81,0x00,0x81,0xc3,0xe7,0xff,
0xaa,0x55,0x18,0xff,0xf0,0x0f,0x00,0xff,0xf8,0xf1,0xe3,0xc7,0x8f,0x1f,0x3f,0x7f,
0x7f,0x3f,0x1f,0x8f,0xc7,0xe3,0xf1,0xf8,0xff,0x00,0x00,0xff,0xff,0x0f,0xf0,0xff,
0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe,
0xfe,0xfe,0xf8,0xf0,0xe0,0xc0,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,
0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff
};

uchar code Pattern_P2[]=
{
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfc,0xf9,0xf3,0xe7,0xcf,0x9f,0x3f,0xff,
0xe7,0xdb,0xbd,0x7e,0xbd,0xdb,0xe7,0xff,0xe7,0xc3,0x81,0x00,0x81,0xc3,0xe7,0xff,
0xaa,0x55,0x18,0xff,0xf0,0x0f,0x00,0xff,0xf8,0xf1,0xe3,0xc7,0x8f,0x1f,0x3f,0x7f,
0x7f,0x3f,0x1f,0x8f,0xc7,0xe3,0xf1,0xf8,0xff,0x00,0x00,0xff,0xff,0x0f,0xf0,0xff,
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f,

0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfc,0xf8,0xf0,0xe0,0xc0,0x80,0x00,
0x00,0x80,0xc0,0xc0,0xf0,0xf8,0xfc,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff
};
//延時

void Delay(uint x)
{
uchar i;
while(x--)
  {
   for(i=0;i<120;i++);
  }
 }

//主程序
void main()
{
uchar i;
while(1)
{//從數組中讀取數據送至P0和P2口顯示
P2=0x00;
while(P1_0==~P1_0){
for(i=0;i<136;i++)
{ P0=Pattern_P0[i];
  P2=Pattern_P2[i];
  Delay(100);   
}}}}

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