main.c

基于keil环境

/***************************************************************
* File Name：main.c
* Description：双灯闪烁
* Date：
***************************************************************/
// GPIO E口寄存器
#define PCONE		(*(volatile unsigned long *)0x1d20028)
#define PDATE		(*(volatile unsigned long *)0x1d2002C)
#define PUPE		(*(volatile unsigned long *)0x1d20030)

void Delay(unsigned int);

int main(void)
{
	// 将GPIO E口置为输出模式
	while(1)
	{
		PDATE = 0xFD;				// Turn LED On(PE.1)
		Delay(100);					// Wait
		PDATE = 0xFB;				// Turn LED On(PE.2)
		Delay(100);					// Wait
	}
}

void Delay(unsigned int x)
{
	unsigned int i, j, k;
	for(i=0; i<=x; i++)
		for(j=0; j<0xff; j++)
			for(k=0; k<0xff; k++);
}