#include "reg51.h"
#include"intrins.h"		//該文件包含有_crol_(…)函數(shù)的說明
void mDelay(unsigned int DelayTime)
{	unsigned int  j=0;
	for(;DelayTime>0;DelayTime--)
	{	for(j=0;j<1250;j++)	
		{;}	
	}
}
void main()
{	unsigned char OutData=0xfe; 
	unsigned char i;
	while(1)
	{	P3|=0x3c;
		if((P3|0xfb)!=0xff)			//K1鍵被按下
		{	for(i=0;i<8;i++)
			{	mDelay(1000);		/*延時1000毫秒*/
				OutData=0xfe;
				if((P3|0xf7)!=0xff)	//K2鍵被按下
					break;
				OutData=_crol_(OutData,i);
				P1&=OutData;
			}	
		}
		P1=0xff;
	}
}