main.c

来自「ARM ADS工程样例」· C语言 代码 · 共 30 行

#define		IOPMOD      (*(volatile   unsigned  *)0x03ff5000)			//IO port mode register
#define		IOPDATA     (*(volatile  unsigned  *)0x03ff5008)			//IO port data register

void  Delay(unsigned int);
int  Main()
{
	unsigned  long  LED;
	IOPMOD	=0xffffffff;	//将IO口设置为输出模式
	IOPDATA=0x01;
	for(;;)
	{
		LED=IOPDATA;
		LED=(LED<<1);
		IOPDATA=LED;
		Delay(10);
		if(!(IOPDATA & 0X0F))
		{
			IOPDATA=0X01;
		}
		return(0);
	}
}

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++);
}