gpfc.c

来自「C和汇编语言的混合编程实验基于S3C2410的」· C语言 代码 · 共 30 行

/*  这是一个利用GPIO做跑马灯的程序
/* GPIO1到GPIO4分别对应2410的GPF4到GPF7 */
#include "2410lib.h"

#define GPFCON    (*(volatile unsigned *)0x56000050) //Port F control
#define GPFDAT    (*(volatile unsigned *)0x56000054) //Port F data
#define GPFUP     (*(volatile unsigned *)0x56000058) //Pull-up control F

int Main()
{
       GPFCON=(GPFCON|0xFF00)&0xFFFF55FF;//GPF4--GPF7设置为output
       GPFUP|=0xFF00;   //disable GPF pull up
   while(1)
    {
       int i=0;
       GPFDAT=(GPFDAT&0xFFFFFF0F)|0xE0;
       Delay(100);
       
       GPFDAT=(GPFDAT&0xFFFFFF0F)|0xD0;
       Delay(100);
       
       GPFDAT=(GPFDAT&0xFFFFFF0F)|0xB0;
       Delay(100);
       
       GPFDAT=(GPFDAT&0xFFFFFF0F)|0x70;
       Delay(100);
    }
 }