wl001.c

来自「周立功的51单片机试验例程,我当年就是靠这个学会单片机的」· C语言 代码 · 共 45 行

/*******************************************************************************
*                                                                              *
*    File       : wl001.c                                                      *
*    Date       : 2004-1-5                                                     *
*    Version    : 1.0                                                          *
*                                                                              *
*    Author     : Freeman          [e-mail]                          *
*    Company    : Willar           www.willar.com                              *
*                                                                              *
********************************************************************************
*    Descriptoon:                                                              *
*                 LED流水灯                                                    *
*                                                                              *
*                                                                              *
*                                                                              *
*                                                                              *
*                                                                              *
*******************************************************************************/
#include<reg51.h>
#include <intrins.h>


void delayms(unsigned char ms)	
// 延时子程序
{						
	unsigned char i;
	while(ms--)
	{
		for(i = 0; i < 120; i++);	
	}
}

main()
{
	unsigned char LED;
	LED = 0xfe;
	P0 = LED;
	
	while(1)
	{
		delayms(250);			
		LED = _crol_(LED,1);		//循环右移1位，点亮下一个LED
		P0 = LED;
	}
}