led_test.c

这个是用于LINUX中的LED测试程序

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <termios.h>
#include <errno.h>
#include "at91_gpio.h"
#include "at91_ioctl.h"

#define SYS_LED AT91_PIN_PC10

int fd;
at91_gpio_arg arg;
void sysled_on()
{
	int fd;
	arg.pin= SYS_LED;
	arg.data = 1;
	ioctl(fd, IOCTL_GPIO_SETOUTPUT, &arg);
}
void sysled_off()
{
        arg.pin= SYS_LED;
        arg.data = 0;
        ioctl(fd, IOCTL_GPIO_SETOUTPUT, &arg);
}
int main(int argc, char *argv[])
{       
 	fd = open ("/dev/gpio", O_RDWR);
	while (1){
		sysled_on();
		sleep(1);
		sysled_off();
	}
	close(fd);	
}