13动态数码显示技术.c

来自「C51学习书」· C语言 代码 · 共 33 行

#include <reg51.h> //13．            动态数码显示技术
  
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--); 
        } 
    } 
}