leddisplay.c

P0端口接动态数码管的字形码笔段

#include <reg51.H> 

unsigned char code table1[]={0x06,0x5b,0x4f,0x66,0x6d}; 

unsigned char code table2[]={0x78,0x79,0x38,0x38,0x3f}; 

unsigned char i; 

unsigned char a,b; 

unsigned char temp; 

void main(void) 

{ 

  while(1) 

    { 

      temp=0xfe; 

      for(i=0;i<5;i++) 

        { 

          if(P1^7==1) 

            { 

              P0=table1[i]; 

            } 

            else 

              { 

                P0=table2[i]; 

              } 

          P2=temp; 

          a=temp<<(i+1); 

          b=temp>>(7-i); 

          temp=a|b; 

//　　　　　for(a=4;a>0;a--) 

 //         for(b=248;b>0;b--); 

        } 

    } 

}