pcf.h

#ifndef __PCF_H_
#define __PCF_H_

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <Wire.h>

#include "PCF8574.h"
PCF8574 pcf8574(0x20, 0, 2);

int led = 0;
int PINbutton1 = 1;
int PINbutton2 = 2;
int PINbutton3 = 3;
int leeren11 = 4;
int leeren1 = 5;
int leeren2 = 6;
int fuellen2 = 7;

struct button {
  int pin;
  int holding;
  int pressed;
  int released;
};

struct button* button1 = (struct button*) malloc(sizeof(struct button));
struct button* button2 = (struct button*) malloc(sizeof(struct button));
struct button* button3 = (struct button*) malloc(sizeof(struct button));

void updateButton(struct button *buttonX);
void setup_pcf ();
void loop_pcf ();

#endif