#include <fcntl.h>
#include <stdint.h>
#include <unistd.h>

int main()
{
 	int i ;
  	int gpio_export, gpio_dir, gpio_led5 ;

  /* port reservation */
  	gpio_export = open ("/sys/class/gpio/export", O_WRONLY);
  	write (gpio_export,"60",3) ;
  	close (gpio_export) ;

  /* port in output direction */
  	gpio_dir = open ("/sys/class/gpio/gpio60/direction", O_WRONLY);
  	write (gpio_dir,"out",4) ;
  	close (gpio_dir) ;

  /* blinking loop */
  	for(uint8_t i=0;i<10;i++) 
	{
      	gpio_led5 = open ("/sys/class/gpio/gpio60/value", O_WRONLY);
      	write (gpio_led5,"1",2) ;
      	close (gpio_led5) ;
      	sleep(1) ;

      	gpio_led5 = open ("/sys/class/gpio/gpio60/value", O_WRONLY);
      	write (gpio_led5,"0",2) ;
      	close (gpio_led5) ;
      	sleep(1) ;
      }

  	return 0 ;
}