ledc.c

s3c的最小启动代码

#define rGPFCON (*(volatile unsigned *)0x56000050)
#define rGPFDAT (*(volatile unsigned *)0x56000054)
#define rGPFUP (*(volatile unsigned *)0x56000058)
void delay(unsigned int time)
{
	for(;time>0;time--)
		;
}
void Main()
{
	unsigned char f=0x10;
	rGPFCON=0x5500;
	rGPFUP=0xf0;
	rGPFDAT=f;
	while(1)
	{
		delay(0x2ffff);
		f=(f<<1)|(f>>3);
		rGPFDAT=f;	

	}
}