#include "LedControl.h"

// Pin configuration for the MAX7219 driver
const int DIN_PIN = 11;  // Data in
const int CS_PIN = 10;   // Chip select
const int CLK_PIN = 13;  // Clock

LedControl lc = LedControl(DIN_PIN, CLK_PIN, CS_PIN, 1);

// Define patterns for the English alphabet (capital letters A to Z)
byte alphabetPatterns[][8] = {
  // A
  {
    B00111100,
    B01000010,
    B10000001,
    B11111111,
    B10000001,
    B10000001,
    B10000001,
    B10000001
  },
  // B
  {
    B11111110,
    B10000001,
    B10000001,
    B11111110,
    B10000001,
    B10000001,
    B10000001,
    B11111110
  },
  // C
  {
    B01111110,
    B10000001,
    B10000000,
    B10000000,
    B10000000,
    B10000001,
    B10000001,
    B01111110
  },
  // D
  {
    B11111100,
    B10000010,
    B10000001,
    B10000001,
    B10000001,
    B10000001,
    B10000010,
    B11111100
  },
  // E
  {
    B11111111,
    B10000000,
    B10000000,
    B11111111,
    B10000000,
    B10000000,
    B10000000,
    B11111111
  },
  // F
  {
    B11111111,
    B10000000,
    B10000000,
    B11111111,
    B10000000,
    B10000000,
    B10000000,
    B10000000
  },
  // G
  {
    B01111110,
    B10000001,
    B10000000,
    B10000000,
    B10001111,
    B10000001,
    B10000001,
    B01111110
  },
  // H
  {
    B10000001,
    B10000001,
    B10000001,
    B11111111,
    B10000001,
    B10000001,
    B10000001,
    B10000001
  },
  // I
  {
    B01111110,
    B00011000,
    B00011000,
    B00011000,
    B00011000,
    B00011000,
    B00011000,
    B01111110
  },
  // J
  {
    B00000011,
    B00000011,
    B00000011,
    B00000011,
    B10000011,
    B10000011,
    B10001110,
    B01110000
  },
  // K
  {
    B10000001,
    B10000010,
    B10000100,
    B11111000,
    B10011000,
    B10000100,
    B10000010,
    B10000001
  },
  // L
  {
    B10000000,
    B10000000,
    B10000000,
    B10000000,
    B10000000,
    B10000000,
    B10000000,
    B11111111
  },
  // M
  {
    B10000001,
    B11000011,
    B10100101,
    B10011001,
    B10000001,
    B10000001,
    B10000001,
    B10000001
  },
  // N
  {
    B10000001,
    B11000001,
    B10100001,
    B10010001,
    B10001001,
    B10000101,
    B10000011,
    B10000001
  },
  // O
  {
    B01111110,
    B10000001,
    B10000001,
    B10000001,
    B10000001,
    B10000001,
    B10000001,
    B01111110
  },
  // P
  {
    B11111110,
    B10000001,
    B10000001,
    B11111110,
    B10000000,
    B10000000,
    B10000000,
    B10000000
  },
  // Q
  {
    B01111110,
    B10000001,
    B10000001,
    B10000001,
    B10001001,
    B10000101,
    B10000011,
    B01111111
  },
  // R
  {
    B11111110,
    B10000001,
    B10000001,
    B11111110,
    B10000100,
    B10000010,
    B10000001,
    B10000000
  },
  // S
  {
    B01111110,
    B10000000,
    B10000000,
    B01111110,
    B00000001,
    B00000001,
    B10000001,
    B01111110
  },
  // T
  {
    B11111111,
    B00011000,
    B00011000,
    B00011000,
    B00011000,
    B00011000,
    B00011000,
    B00011000
  },
  // U
  {
    B10000001,
    B10000001,
    B10000001,
    B10000001,
    B10000001,
    B10000001,
    B10000001,
    B01111110
  },
  // V
  {
    B10000001,
    B10000001,
    B10000001,
    B10000001,
    B10000001,
    B10000001,
    B01000010,
    B00111100
  },
  // W
  {
    B10000001,
    B10000001,
    B10000001,
    B10011001,
    B10100101,
    B11000011,
    B10000001,
    B10000001
  },
  // X
  {
    B10000001,
    B10000001,
    B01000010,
    B00111100,
    B00111100,
    B01000010,
    B10000001,
    B10000001
  },
  // Y
  {
    B10000001,
    B10000001,
    B01000010,
    B00111100,
    B00011000,
    B00011000,
    B00011000,
    B00011000
  },
  // Z
  {
    B11111111,
    B00000001,
    B00000010,
    B00011100,
    B00110000,
    B01000000,
    B10000000,
    B11111111
  }
};

void setup() {
  // Initialize the MAX7219
  lc.shutdown(0, false);
  lc.setIntensity(0, 8);
  lc.clearDisplay(0);
}

void shiftAlphabetRight(int delayTime) {
  int numLetters = 26; // Number of letters from A to Z

  for (int i = 0; i < numLetters * 8; i++) {
    int letterIndex = i % numLetters;
    int col = i / numLetters;

    for (int row = 0; row < 8; row++) {
      byte currentLetter = alphabetPatterns[letterIndex][row] >> col;
      byte nextLetter = alphabetPatterns[(letterIndex + 1) % numLetters][row] << (8 - col);

      byte interpolatedValue = currentLetter | nextLetter;

      lc.setRow(0, row, interpolatedValue);
    }

    delay(delayTime);
  }
}

void loop() {
  shiftAlphabetRight(500);
}