main.c

这也是继上面我传的C51基础程序

#include "reg51.h"
#define unint unsigned int

void Delay();

void main()
{
   P1=0xfe;
   Delay();
  while(1)
  {
   while(P1&0x08)
   {
     P1=(P1<<1)|0x01;
	 Delay();
   }
   while(P1&0x01)
	{ P1=(P1>>1)|0x80;
	 Delay();
   }
   }
 }
 void Delay() 
 {
   unint i,j;
   for(i=0;i<=550;i++)
     for(j=0;j<=255;j++);
  }