JZ2440点亮一个LED

 1 #define GPFCON (*(volatile unsigned long *)0X56000050)
 2 #define GPFDAT (*(volatile unsigned long *)0X56000054)
 3 
 4 #define GPF4_O  (1<<(4*2))
 5 
 6 int main()
 7 {
 8     //设置GPF4为输出IO
 9     GPFCON = GPF4_O;
10     //将GPF输出全部拉高
11     GPFDAT = 0XFF;
12     
13     while(1){
14         //将GPF4输出设置为低电平
15         GPFDAT &= ~(1<<4);
16     }
17 
18     return 0;
19 }