From 8b67f486d0e3415d52746c5b6b109ea24d75c166 Mon Sep 17 00:00:00 2001
From: Gerardo Marx <gmarx_cc@itmorelia.edu.mx>
Date: Thu, 17 Sep 2026 11:04:25 -0600
Subject: [PATCH] testing gpio

---
 main.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/main.c b/main.c
index 6d8876f..c666ccb 100644
--- a/main.c
+++ b/main.c
@@ -1,6 +1,34 @@
 #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);
+	// pin direction
+	fd = open("/sys/class/gpio/chip0/gpio17/direction", O_WRONLY);
+	write(fd,"out",3);
+	close(fd);
+	
+	// pin value to 1
+	fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
+	write(fd,"1",1);
+	close(fd);
+	sleep(1);
+	// pin valu to 0
+	fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
+	write(fd,"0",1);
+	close(fd);
+	sleep(1);
+	// unexport
+	fd = open("/sys/class/gpio/chip0/unexport", O_WRONLY);
+	write(fd,"17",2);
+	close(fd);
+
+
 	printf("Hello from Raspberry Pi!\n");
 	printf("Number of arguments: %d\n", argc);
 	printf("Program is reciving: %s\n", argv[0]);