uint8_t code[] = {63, 6, 91, 79, 102, 109, 125, 39, 127, 111};
// Символи: "0","1","2","3","4","5","6","7","8","9"
uint8_t segmPin[] = {2, 3, 4, 5, 6, 7, 8, 9};
// Порти сегментів: A, B, C, D, E, F, G

uint8_t groupPin[] = {19, 18, 17, 20};

//БАХ
uint8_t boom[] = {125, 119, 118};

byte colPort[] = {A11, A10, A9};

byte rowPort[] = {A15, A14, A13, A12};

char keys[4][3] = {{'1', '2', '3'},
  {'4', '5', '6'},
  {'7', '8', '9'},
  {'*', '0', '#'}
};


void setup() {
  for (uint8_t s = 0; s < 7; s++) {
    pinMode(segmPin[s], OUTPUT);
  }
  for (uint8_t group = 0; group < 4; group++)
    pinMode(groupPin[group], OUTPUT);

  for (uint8_t col = 0; col < 4; col++)
    pinMode(colPort[col], INPUT);
  for (uint8_t row = 0; row < 4; row++)
    pinMode(rowPort[row], INPUT_PULLUP);

}

void loop() {
  char key = getKey();
  uint8_t displayValue[] = {key - '0',key - '0',key - '0',key - '0'};
  displayArray(displayValue);
  

}

void show_segments(uint8_t num) {
  digitalWrite(segmPin[num], HIGH);
}



void show(uint8_t num) {
  for (uint8_t s = 0; s < 7; s++) {
    uint8_t segmState = bitRead(code[num], s);
    digitalWrite(segmPin[s], segmState);
  }
}


void setGroup(uint8_t newGroup) {
  for (uint8_t group = 0; group < 4; group++) {
    if (group == newGroup)
      digitalWrite(groupPin[group], LOW);
    else
      digitalWrite(groupPin[group], HIGH);
  }
}

void displayArray(uint8_t displayValue[]) {
  for (uint8_t group = 0; group < 4; group++) {
    clearSegments();
    setGroup(group);
    show(displayValue[group]);
    delay(1);
  }
}

void clearSegments() {
  for (uint8_t segm = 0; segm < 7; segm++) {
    digitalWrite(segmPin[segm], LOW);
  }
}

void setCol(uint8_t newCol) {
  for (uint8_t col = 0; col < 4; col++) {
    pinMode(colPort[col], INPUT);
  }

  pinMode(colPort[newCol], OUTPUT);

  digitalWrite(colPort[newCol], LOW);
}

char getKey() {
  for (uint8_t col = 0; col < 3; col++) {
    setCol(col); // Активуємо стовпчик
    delay(1); // Затримка на перехідні процеси
    for (uint8_t row = 0; row < 4; row++) {
      if (digitalRead(rowPort[row]) == LOW)
        return keys[row][col];
    }
  }
  return 0;
}