led_on_c.c.bak

来自「S3C2440硬件板级测试程序」· BAK 代码 · 共 11 行

#define GPBCON      (*(volatile unsigned long *)0x56000010)
#define GPBDAT      (*(volatile unsigned long *)0x56000014)

int main()
{
    GPBCON = 0x00000400;    // 设置GPB5为输出口, 位[10:9]=0b01
    GPBDAT = 0x00000000;    // GPB5输出0，LED1点亮

    return 0;
}