#include <reg51.h>
  //26．            點陣式LED簡單圖形顯示技術
unsigned char code tab[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; 
unsigned char code graph[3][8]={{0x12,0x14,0x3c,0x48,0x3c,0x14,0x12,0x00}, 
                                {0x00,0x00,0x38,0x44,0x44,0x44,0x38,0x00}, 
                                {0x30,0x48,0x44,0x22,0x44,0x48,0x30,0x00} 
                               }; 
unsigned char count; 
unsigned char cnta; 
  
void main(void) 
{ 
  unsigned char i,j; 
  
  TMOD=0x01; 
  TH0=(65536-4000)/256; 
  TL0=(65536-4000)%256; 
  TR0=1; 
  ET0=1; 
  EA=1; 
  
  while(1) 
    { 
      if(P2_0==0) 
        { 
          for(i=5;i>0;i--) 
          for(j=248;j>0;j--); 
          if(P2_0==0) 
            { 
              count++; 
              if(count==3) 
                { 
                  count=0; 
                } 
              while(P2_0==0); 
            } 
        } 
    } 
} 
  
void t0(void) interrupt 1 using 0 
{ 
  TH0=(65536-4000)/256; 
  TL0=(65536-4000)%256; 
  P3=tab[cnta]; 
  P1=graph[count][cnta]; 
  cnta++; 
  if(cnta==8) 
    { 
      cnta=0; 
    } 
}