led.c

来自「《ARM与嵌入式系统基础教程》」· C语言 代码 · 共 16 行

int SYSEntry(void)
{
	int i;

	*(unsigned int*)0xFFFFFC10 = (unsigned int)1 << 3;
	*(unsigned int*)0xFFFFF600 = (unsigned int)1 << 19;
	*(unsigned int*)0xFFFFF610 = (unsigned int)1 << 19;
	
	while(1)
	{
		*(unsigned int*)0xFFFFF634 = (unsigned int)1 << 19;
		for(i=0; i<500; i++);
		*(unsigned int*)0xFFFFF630 = (unsigned int)1 << 19;
		for(i=0; i<500; i++);
	}	
}