#include <LedControl.h>

// PIN tanımları: DIN, CLK, CS
LedControl lc = LedControl(11, 13, 10, 1);

// H-E-L-L-O karakterlerinin sadeleştirilmiş 8x8 bitmap hali (örnek)
const byte letters[][8] = {
  // H
  {B10010000, B10010000, B10010000, B11110000, B10010000, B10010000, B10010000, B00000000},
  // E
  {B11110000, B10000000, B10000000, B11110000, B10000000, B10000000, B11110000, B00000000},
  // L
  {B10000000, B10000000, B10000000, B10000000, B10000000, B10000000, B11110000, B00000000},
  // L
  {B10000000, B10000000, B10000000, B10000000, B10000000, B10000000, B11110000, B00000000},
  // O
  {B01100000, B10010000, B10010000, B10010000, B10010000, B10010000, B01100000, B00000000}
};

const int letterCount = sizeof(letters) / 8;
int scrollPos = 0;

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

void loop() {
  for (int col = 0; col < 8; col++) {
    for (int row = 0; row < 8; row++) {
      byte val = getColumnData(scrollPos + col, row);
      lc.setLed(0, row, 7 - col, val);
    }
  }

  scrollPos++;
  if (scrollPos >= letterCount * 8) scrollPos = 0;
  delay(150);
}

bool getColumnData(int colIndex, int row) {
  int charIndex = colIndex / 8;
  int colInChar = colIndex % 8;

  if (charIndex >= letterCount) return false;
  return bitRead(letters[charIndex][row], 7 - colInChar);  // soldan okuma
}