#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>

Adafruit_SSD1306 lcd(128, 64, &Wire, 4);

#define btn_up     5
#define btn_down   6
#define btn_ok     7
#define btn_cancel 8

boolean status_up   = false;
boolean status_ok   = false;
boolean status_down = false;
boolean status_cancel = false;

boolean up   = false;
boolean down   = false;
boolean ok = false;
boolean cancel = false;

//int page []  = {"startmenu", "menu1", menu2, menu3};
int menucounter  =  0;
boolean select = false;

int set_temp = 0;
int kp, ki, kd = 0;
int set_motor_velo = 0;

void setup() {
  Serial.begin(115200);
  lcd.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  lcd.clearDisplay();

  pinMode(btn_up,   INPUT_PULLUP);
  pinMode(btn_ok,   INPUT_PULLUP);
  pinMode(btn_down, INPUT_PULLUP);
}

void loop() {

  up     = digitalRead(btn_up);
  down   = digitalRead(btn_down);
  ok     = digitalRead(btn_ok);
  cancel = digitalRead(btn_cancel);

  if (up == 0) {
    delay(50);
    menucounter++;
    if(menucounter>3) menucounter=0;
  }

    if (down == 0) {
    delay(50);
    menucounter--;
    if(menucounter<0) menucounter=3;
  }

  if (ok == 0) {
    delay(50);
    select=true;
  }

  if (cancel == 0) {
    delay(50);
    select = false;
  }

  switch (menucounter) {
    case 0:
    Serial.println("ana menü");
    break;

    case 1:
    Serial.println("menü1");
      if(select==true) {
        Serial.println("menü1'in altı");
        if(up==0) {
          delay(50);
          set_temp++;
          Serial.println(set_temp);
        }
      }
    break;

    case 2:
    Serial.println("menü2");
      if(select==true) {
        Serial.println("menü2'in altı");
      }
    break;

    case 3:
    Serial.println("menü3");
      if(select==true) {
        Serial.println("menü3'in altı");
      }
    break;

    }




}