// Hands-on 2: GPIO Input with Debouncing //
// Nama: Moh. Thoriq Ghautsillah //
// NIM: 20/464222/SV/18541 //

int digit[10][7] = {{LOW,LOW,LOW,LOW,LOW,LOW,HIGH},           // Angka 0
                    {HIGH,LOW,LOW,HIGH,HIGH,HIGH,HIGH},       // Angka 1
                    {LOW,LOW,HIGH,LOW,LOW,HIGH,LOW},          // Angka 2
                    {LOW,LOW,LOW,LOW,HIGH,HIGH,LOW},          // Angka 3
                    {HIGH,LOW,LOW,HIGH,HIGH,LOW,LOW},         // Angka 4
                    {LOW,HIGH,LOW,LOW,HIGH,LOW,LOW},          // Angka 5
                    {LOW,HIGH,LOW,LOW,LOW,LOW,LOW},           // Angka 6
                    {LOW,LOW,LOW,HIGH,HIGH,HIGH,HIGH},        // Angka 7
                    {LOW,LOW,LOW,LOW,LOW,LOW,LOW},            // Angka 8
                    {LOW,LOW,LOW,LOW,HIGH,LOW,LOW}};          // Angka 9
int ledPin[7] = {6,7,8,9,10,11,12};                           // Inisialisasi array pin LED
int button_1 = 2;                                             // Inisialisasi pin pushbutton count up  
int button_2 = 3;                                             // Inisialisasi pin pushbutton count down
int i;                                                        // Inisialisasi variabel increment for loop
int counter = 0;                                              // Variabel penghitung

void setup() {
  // put your setup code here, to run once:
  for(i = 0; i < 8; i++)
  {
    pinMode(ledPin[i], OUTPUT);                               // Array pin LED sebagai OUTPUT
  }
  for(i = 0; i < 8; i++)
  {
    digitalWrite(ledPin[i], digit[0][i]);                     // Kondisi awal 7 segment menampilkan angka 0
  }
  pinMode(button_1, INPUT_PULLUP);                            // Mode button_1 sebagai INPUT_PULLUP
  pinMode(button_2, INPUT_PULLUP);                            // Mode button_2 sebagai INPUT_PULLUP
}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(button_1) == 0)
  {
    delay(10);
    if(digitalRead(button_1) == 0)
    {
      delay(10);
      while(digitalRead(button_1) == 0){delay(1);}            // Debouncing
      counter++;                                              // Increment pada variabel counter
      if(counter > 9)
      {
        counter = 0;
      }
    }
  }

  if(digitalRead(button_2) == 0)
  {
    delay(10);
    if(digitalRead(button_2) == 0)
    {
      delay(10);
      while(digitalRead(button_2) == 0){delay(1);}            // Debouncing
      counter--;                                              // Decrement pada variabel counter
      if(counter < 0)
      {
        counter = 9;
      }
    }
  }

  for(i = 0; i < 8; i++)
  {
    digitalWrite(ledPin[i], digit[counter][i]);               // Menampilkan angka pada 7 segment
  }
}