#include "reg51.h"
#include"intrins.h"		//該文件包含有_crol_(…)函數的說明
void mDelay(unsigned int DelayTime)
{	unsigned int  j=0;
	for(;DelayTime>0;DelayTime--)
	{	for(j=0;j<125;j++)	
		{;}	
	}
}
void main()
{	unsigned char OutData=0xfe; 
	while(1)
	{	
		P1=OutData;
		OutData=_crol_(OutData,1); //循環左移
		mDelay(1000);	/*延時1000毫秒*/
	}
}