चिप - $ 9 रास्पबेरी पाई किलर

ssh chip@192.168.1.109

su

cd /sys/class/gpio

echo 408 > export 
echo out > gpio408/direction

echo 1 > gpio408/value   #  
echo 0 > gpio408/value   #  

echo in > gpio408/direction
echo 408 > unexport

cd ~/
mkdir projects
cd projects
mkdir blink
cd blink

nano

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>

int main()
{
	int fd;

	//    GPIO
	fd = open("/sys/class/gpio/export", O_WRONLY);
	if (fd < 0)
	{
		return -1;
	}

	write(fd, "408", 3);
	close(fd);

	//    
	fd = open("/sys/class/gpio/gpio408/direction", O_RDWR);
	if (fd < 0)
	{
		return -1;
	}

	write(fd, "out", 4);
	close(fd);

	//      
	fd = open("/sys/class/gpio/gpio408/value", O_RDWR);
	if (fd < 0)
	{
		return -1;
	}

	int i;
	for (i = 0; i < 1000; ++i)
	{
		write(fd, "1", 2);
		sleep(3);
		write(fd, "0", 2);
		sleep(3);
	}

	//    GPIO
	fd = open("/sys/class/gpio/unexport", O_WRONLY);
	if (fd < 0)
	{
		return -1;
	}

	write(fd, "408", 3);
	close(fd);
	return 0;
}

gcc main.c -o blink
./blink