loop1.c

继续发到单片机c语言快速入门项目源码

#include "reg51.h"
#include"intrins.h"			//该文件包含有_crol_（…）函数的说明
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;
		while((P3|0xfb)!=0xff)
		{	P1=OutData;
			OutData=_crol_(OutData,1);//循环左移
			mDelay(1000);/*延时1000毫秒*/
			P1=0xff;
		}
	}
}