Segundo

main.c

@@ -1,7 +1,40 @@
 #include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
 
 int main(int argc, char *argv[])
 {
+	int fd;
+	// EXPORT
+	fd = open("/sys/class/gpio/chip0/export", O_WRONLY);
+	write(fd, "17", 2);
+	close(fd);
+	// DIRECTION	
+	fd = open("/sys/class/gpio/chip0/gpio17/direction", O_WRONLY);
+	write(fd, "out",3);
+	close(fd);
+	// VALUE	
+	fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
+	write(fd, "1", 1);
+	close(fd);
+	sleep(1);
+	// Unexport
+	fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
+	write(fd, "0", 1);
+	close(fd);
+	sleep(1);
+
+
+	fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
+	write(fd, "1", 1);
+	close(fd);
+	sleep(1);
+
+	fd = open("/sys/class/gpio/chip0/gpio17/unexport", O_WRONLY);
+	write(fd, "17", 2);
+	close(fd);
+
+
 	printf("Number of arguments: %d\n", argc);
 	printf("Program is reciving: %s\n", argv[0]);