led.c

来自「周立功magic2200实验箱linux增补例子。包括（GPIO zlg7290」· C语言 代码 · 共 34 行

#define IN_TGPIO
#include "config.h"

#define LED  16     // P2.16 controle LED

int main(void)
{
    int fd;
    uint32  val;

    fd = open("/dev/P2", O_RDONLY);
    if(fd == -1)
    {
        printf("\nCan't open P2!\n");
        return -1;
    }

    ioctl(fd, GPIO_SET_PIN_OUT, LED);
    while(1)
    {
        printf("\nLED toggle :\n0-- Led on\n1-- Led off\nother-- exit\n");
        scanf("%d",&val);

      	if (val == 0)
            ioctl(fd, GPIO_CLR_PIN, LED);
       	else  if (val == 1)
            ioctl(fd, GPIO_SET_PIN,  LED);
       	else
            close(fd);
    }

    return 0;
}