// code 1


// Pin configuration for decoders
const int MOD_0 = 6;   // A0, A1, A2 of the 1st decoder
const int MOD_1 = 7;
const int MOD_2 = 8;

const int PIN_0 = 9;   // A0, A1, A2 of the 2nd decoder
const int PIN_1 = 10;
const int PIN_2 = 11;

const int RESET = 5;   // Reset pin for decoder
const int SET = 4;     // Set pin for decoder

void setup() {
  // Initialize Serial communication
  Serial.begin(9600);

  // Configure decoder pins as OUTPUT
  pinMode(MOD_0, OUTPUT);
  pinMode(MOD_1, OUTPUT);
  pinMode(MOD_2, OUTPUT);

  pinMode(PIN_0, OUTPUT);
  pinMode(PIN_1, OUTPUT);
  pinMode(PIN_2, OUTPUT);

  pinMode(SET, OUTPUT);
  pinMode(RESET, OUTPUT);

  // Initialize all outputs to LOW
  clearAllDots();
}

void loop() {
  // Check for input from the Serial Monitor
  if (Serial.available() > 0) {
    int number = Serial.parseInt(); // Read the number (1–10)

    // Validate input
    if (number >= 1 && number <= 10) {
      activateBraille(number); // Activate the corresponding Braille dots
    } else {
      Serial.println("Invalid input! Please enter a number between 1 and 10.");
    }
  }
}

void activateBraille(int number) {
  clearAllDots(); // Turn off all dots first

  // Braille dot patterns for numbers 1–10
  // Each bit in the number corresponds to a Braille dot (1 to 6)
  // Example: 0b001001 = Dot 1 and Dot 4 (number 3)
  const byte braillePatterns[10] = {
    0b000001, // 1 -> Dot 1
    0b000011, // 2 -> Dot 1, Dot 2
    0b001001, // 3 -> Dot 1, Dot 4
    0b011001, // 4 -> Dot 1, Dot 4, Dot 5
    0b010001, // 5 -> Dot 1, Dot 5
    0b001011, // 6 -> Dot 1, Dot 2, Dot 4
    0b011011, // 7 -> Dot 1, Dot 2, Dot 4, Dot 5
    0b010011, // 8 -> Dot 1, Dot 2, Dot 5
    0b001101, // 9 -> Dot 1, Dot 4, Dot 6
    0b011101  // 10 -> Dot 1, Dot 4, Dot 5, Dot 6
  };

  // Retrieve the pattern for the given number
  byte pattern = braillePatterns[number - 1];

  // Activate dots based on the pattern
  for (int i = 0; i < 6; i++) {
    if (pattern & (1 << i)) {
      selectDot(i + 1); // Activate the dot (1-based index)
      pinSet();         // Set the selected dot
      delay(10);        // Small delay for stability
    }
  }

  Serial.print("Braille dots activated for number ");
  Serial.println(number);
}

void selectDot(int dot) {
  // Ensure the input is valid (1 to 6)
  if (dot < 1 || dot > 6) return;

  dot--; // Convert to 0-based index for binary calculations

  // Select the dot using the second decoder
  digitalWrite(PIN_0, (dot >> 0) & 0x01);
  digitalWrite(PIN_1, (dot >> 1) & 0x01);
  digitalWrite(PIN_2, (dot >> 2) & 0x01);
}

void pinSet() {
  digitalWrite(SET, HIGH);
  digitalWrite(RESET, LOW);
}

void pinReset() {
  digitalWrite(SET, LOW);
  digitalWrite(RESET, HIGH);
}

void clearAllDots() {
  digitalWrite(SET, LOW);
  digitalWrite(RESET, LOW);
  delay(10); // Ensure all are off
}