main.c

@@ -1,21 +1,18 @@
-// Christian Angelus 24/09/2026
-// gpio command tool
 #include <stdio.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include <string.h>
-
-//prototype functions
-int gpio_export(const char *gpio);
-int gpio_direction(int gpio, const char *direction);
-int gpio_write(int gpio, int value);
 
 int main (int argc, char *argv[]){
-
 	int fd;
-	char pin[] = "17";
+	//export
-	gpio_export(pin);
+	fd = open("/sys/class/gpio/chip0/export", O_WRONLY);
-
+	if(fd<0)
+	{
+		perror("Error openng the GPIO export path");
+		return -1;
+	}
+	write(fd, "17",2);
+	close(fd);
 	//pin direction
 	fd = open("/sys/class/gpio/chip0/gpio17/direction", O_WRONLY);
 	if(fd<0)
@@ -34,8 +31,17 @@ int main (int argc, char *argv[]){
 	}
 	write(fd, "1",1);
 	close(fd);
+	sleep(1);
 	//pin apagao
-	
+	fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
+	if(fd<0)
+	{
+		perror("Error openng the GPIO export path");
+		return -1;
+	}
+	write(fd, "0",1);
+	close(fd);
+	sleep(1);
 	//unexport
 	
 	fd = open("/sys/class/gpio/chip0/unexport", O_WRONLY);
@@ -56,33 +62,3 @@ int main (int argc, char *argv[]){
 		printf("Argument: %s\n", argv[1]);
 	return 0;
 }
-
-//Complete functions
-//
-//gpio export
-int gpio_export(const char *gpio){
-	int fd;
-	//export
-	fd = open("/sys/class/gpio/chip0/export", O_WRONLY);
-	if(fd<0){
-		perror("Error openng the GPIO path");
-		return -1;
-	}
-	write(fd,gpio, strlen(gpio));
-	close(fd);
-	return 0;
-}
-
-//Gpio direction
-int gpio_direction(int gpio, const char *direction){
-	int fd;
-	//export
-	fd = open("/sys/class/gpio/chip0/export", O_WRONLY);
-	if(fd<0){
-		perror("Error openng the GPIO path");
-		return -1;
-	}
-	write(fd,gpio, strlen(direction));
-	close(fd);
-	return 0;
-	}