#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)
	{	P3|=0x3c;
		do
		{	P1=OutData;
			OutData=_crol_(OutData,1); //循環左移
			mDelay(1000);		/*延時1000毫秒*/
		} while((P3|0xfb)!=0xff);
		P1=0xff;
	}
}