// Pin assignments for the columns and rows
const int colPins[3] = {5, 18, 19};
const int rowPins[2] = {16, 17};

bool keyStates[2][3];

void setup() {
  Serial.begin(115200);

  for (int col = 0; col < 3; col++) {
    pinMode(colPins[col], OUTPUT);
    digitalWrite(colPins[col], HIGH);
  }

  // Set row pins as inputs
  for (int row = 0; row < 2; row++) {
    pinMode(rowPins[row], INPUT);
  }
}

void loop() {
  // Scan the keyboard matrix
  for (int col = 0; col < 3; col++) {
    digitalWrite(colPins[col], LOW);

    for (int row = 0; row < 2; row++) {
      pinMode(rowPins[row], OUTPUT);
      digitalWrite(rowPins[row], LOW);
      delay(1);
      
      pinMode(rowPins[row], INPUT);
      keyStates[row][col] = digitalRead(rowPins[row]);
    }
    digitalWrite(colPins[col], HIGH);
  }

  Serial.println("Key States:");
  for (int row = 0; row < 2; row++) {
    for (int col = 0; col < 3; col++) {
      Serial.print(keyStates[row][col] ? "Pressed " : "Released ");
    }
    Serial.println();
  }
  Serial.println();

  delay(500); 
}