led.c

lpc2148上的一个可带操作系统的多任务编程模式

#include <LPC214x.H>                       /* LPC214x definitions  */

const unsigned int  LED=(1<<24);          //P1.24控制LED,低电平点亮
const unsigned int  LCD_Light=(1<<25);

/******长延时********/
void DelayNS(unsigned int  dly )
{
	unsigned int  i;
	for(;dly>0;dly--)
		for(i=0;i<10000;i++);
}


int main (void)
{
	
	PINSEL2=PINSEL2&(~0x08);
	IO1DIR=LED;

	
	while(1)
	{

			IO1SET=LED;
			DelayNS(100);
			IO1CLR=LED;
			DelayNS(100);

	}
    return 0;
}