/*GPIO.c*/
#include<stdio.h>
#include<fcntl.h>
#include<string.h>
#include<unistd.h>
#include<string.h>
#include "gpio.h"


void writeFile(char *filename, char *buffer, size_t count)
{
	int fd = open(filename, O_WRONLY);
	if(fd == -1) {
		perror("Fehler bei open ");
	}
	write(fd, buffer, count);
	close(fd);
}

void registerPin(char *pin)
{
	writeFile(BASEPATH "export", pin, strlen(pin));
}

void freePin(char *pin)
{
	writeFile(BASEPATH "unexport", pin, strlen(pin));
}

void setDirection(char *pin, char *direction, int dirlen)
{
	char path[50];
	sprintf(path, BASEPATH GPIO_FOLDER "direction", pin);
	writeFile(path, direction, dirlen);
}

void registerOutput(char *pin)
{
	registerPin(pin);
	setDirection(pin, "out", 3);
}

void writeOutput(char *pin, int state)
{
	char path[50];
	sprintf(path, BASEPATH GPIO_FOLDER "value", pin);
	FILE *fd = fopen(path, "w");
	fprintf(fd, "%i", state);
	fclose(fd);
}