//====================================================================================
//STEPPER MOTOR
const int dirPin = 11;
const int stepPin = 12;
const int stepsPerRevolution = 3200;
int delayMicro = 1250;

//====================================================================================
//LCD
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);

//====================================================================================

//KEYPAD
#include <Keypad.h>

const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns

char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};

byte rowPins[ROWS] = {9, 8, 7, 6}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {5, 4, 3, 2}; //connect to the column pinouts of the keypad

//Create an object of keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

//====================================================================================

//SENSOR
int S1 = 10;
int y_value=0;

//====================================================================================

int latch,menu;

//====================================================================================

void setup() {
  // Initiate the LCD:
  lcd.init();
  lcd.backlight();
  latch = 0;

  // Declare pins as Outputs Stepper  Motor
  pinMode(stepPin, OUTPUT);
  pinMode(dirPin, OUTPUT);

  lcd.setCursor (0,0);
  lcd.print ("COUNTING MACHINE");
  lcd.setCursor (0,1);
  lcd.print ("   PT GEOMED    ");
  delay (3000);
  lcd.clear();
  delay (500);

}

void loop() {
 char key = keypad.getKey();// Read the key
 int count = digitalRead(S1);

//=====================================================
//================BACK TO MENU UTAMA===================
//=====================================================

  if (key == 'D' && (latch == 0 || latch == 1 ||latch == 2))
  {
    menu=0;
    latch=0;
    y_value=0;
  }

 //================KLIK A AUTO=============================
  if (key == 'A' && latch == 0)
  {
    lcd.clear();
    menu=1;
    latch=1;
  }

 //================KLIK B MANUAL=============================
  if (key == 'B' && latch == 0)
  {
    lcd.clear();
    menu=2;
    latch=1;
  }

//===================MENU UTAMA=======================
if (menu==0) 
{
  lcd.setCursor(0,0);
  lcd.print("  PILIH MENU :  ");
  lcd.setCursor(0,1);
  lcd.print("A>MANUAL  B>AUTO");
}

//===================SUBMENU AUTO=====================
if (menu==1) 
  { 
    
    lcd.setCursor(0,0);
    lcd.print("  MENGHITUNG... ");
    lcd.setCursor(0,1);
    lcd.print("JUMLAH :");
    lcd.setCursor(9,1);
    lcd.print(y_value);
      
    if (count==0){
    y_value++;
    delay(150);
    }
   
    
}

//=================SUBMENU MANUAL====================
if (menu==2) 
  {
    lcd.setCursor(0,0);
    lcd.print("MASUKKAN JUMLAH ");
    lcd.setCursor(0,1);
    lcd.print("BARANG : ");
  } 

 //=================STEPPER RUN====================
 if (menu==1) {
  digitalWrite(dirPin, HIGH);
    digitalWrite(stepPin, HIGH);
    delayMicroseconds(delayMicro);
    digitalWrite(stepPin, LOW);
    delayMicroseconds(delayMicro);
 }
}