led.c

at91sam7s64的典型应用

#include "at91sam7s64.h"


void delay(unsigned long int i)
{
	for(;i>0;i--)
	;

}


void main(void)
{
	*AT91C_PMC_PCER=0x0000000F;		//PMC外设时钟使能
	*AT91C_PIOA_PER=0x0000000F;	  	//PIOA0-3作为I/O使用
	*AT91C_PIOA_OER=0x0000000F;	   	//PIOA0-3输出使能
	for(;;)
	{
		unsigned long int i;
		for(i=0;i<=15;i++) 			//4个LED灯以16进制方式显示0-15
		{
		*AT91C_PIOA_SODR=i;
		delay(5000000);
		*AT91C_PIOA_CODR=i;
		delay(5000000);
	   	}
	
	}



}