273.c

单片机开发资料光盘-双龙-686M.zip

#include <AT89X51.H>
void Delay(void)
	{
	unsigned int a, b;
	for (a=0;a<250;a++)
	    {	      
	      for (b=0;b<250; b++)
	         ;
	     }		
	}
unsigned char xdata led _at_ 0xf700;
void main(void)
{
 unsigned char data i;
 while(1)
 {
  for(i=0;i<8;i++)
   {
    led=~(1<<i);
	Delay();
   }
 }
}