/*******************************************************************************
*                                                                              *
*    File       : uP51s001.c                                                   *
*    Date       : 2004-9-5                                                     *
*    Version    : 1.0                                                          *
*                                                                              *
*    Author     : kevin           kevin@dz51.com                               *
*    Company    : Http://www.dz51.com                                          *
*                                                                              *
********************************************************************************
*    Descriptoon:                                                              *
*                 LED流水燈                                                    *
*                                                                              *
*                                                                              *
*                                                                              *
*                                                                              *
*                                                                              *
*******************************************************************************/
#include<reg51.h>
#include <intrins.h>


void delayms(unsigned char ms)	
// 延時子程序
{						
	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);		//循環右移1位，點亮下一個LED
		P0 = LED;
	}
}