#include <Keypad.h>

// Pin shift register 74HC595
#define CLOCK 2
#define LATCH 3
#define DATA 4
#define BUZZER 13 // Tambahkan pin untuk buzzer

// Data untuk seven-segment common cathode
const byte num[] = { 
  0b00111111, // 0
  0b00000110, // 1
  0b01011011, // 2
  0b01001111, // 3
  0b01100110, // 4
  0b01101101, // 5
  0b01111101, // 6
  0b00000111, // 7
  0b01111111, // 8
  0b01101111, // 9
  0b01110111, // A
  0b01111100, // b
  0b00111001, // C
  0b01011110, // d
  0b01111001, // E
  0b01110001  // F
};

// Konfigurasi Keypad 4x4
const byte ROWS = 4; 
const byte COLS = 4; 
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte rowPins[ROWS] = {5, 6, 7, 8};    
byte colPins[COLS] = {9, 10, 11, 12};  

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  pinMode(CLOCK, OUTPUT);
  pinMode(LATCH, OUTPUT);
  pinMode(DATA, OUTPUT);
  pinMode(BUZZER, OUTPUT); // Atur pin buzzer sebagai output
}

void loop() {
  char key = keypad.getKey(); // Baca input keypad

  if (key) {
    int index = -1;

    if (key >= '0' && key <= '9') {
      index = key - '0'; // Konversi karakter angka 0-9
    } else if (key >= 'A' && key <= 'F') {
      index = key - 'A' + 10; // Konversi huruf A-F
    }

    // Bunyikan buzzer saat tombol ditekan
    tone(BUZZER, 1000, 200); // Frekuensi 1000Hz, durasi 200ms

    if (index != -1) {
      displayCharacter(index);
    }
  }
}

// Fungsi untuk menampilkan karakter di seven-segment
void displayCharacter(int num) {
  digitalWrite(LATCH, LOW);
  shiftOut(DATA, CLOCK, MSBFIRST, ::num[num]); // Kirim data ke shift register
  digitalWrite(LATCH, HIGH);
}