main.c

适用于S3C2410

/*C语言函数
*/

/*PORT B寄存器预定义*/
#define rGPBCON		(*(volatile unsigned *)0x56000010)
#define rGPBDAT		(*(volatile unsigned *)0x56000014)
#define rGPBUP		(*(volatile unsigned *)0x56000018)	

/*PORT F寄存器预定义*/
#define rGPFCON		(*(volatile unsigned *)0x56000050)
#define rGPFDAT		(*(volatile unsigned *)0x56000054)
#define rGPFUP		(*(volatile unsigned *)0x56000058)
	  
extern int delay(int time); /*声明汇编函数*/

void Main()
{
	rGPFCON=0x0;        /*设置I/O口的GPF1为输入*/
	rGPFUP=0xffff;      /*禁止GPF端口的上拉*/
	
	rGPBCON=0x0005;		/*设置I/O口GPB0,GPB1为输出属性*/
	rGPBUP=0xffff;			/*禁止GPB端口的上拉*/
	while(1)				/*不断的循环*/
 	{
 	    if((rGPFDAT&0x0002)==0)      /*检测按键S4是否按下*/
 	    {
 	        rGPBDAT=0xfc;				/*使GPB0输出高电平，GPB1输出低电平，LED3灯会灭,LED4灯会亮*/
		    delay(0xffff);				/*调用汇编延迟函数*/
		    rGPBDAT=0x03;				/*使GPB0输出低电平，GPB1输出高电平