Multi-Dimensional Arrays, Retreving data.

Projects Programming
6

What LEDs turn on with the code that you attached? How are the LEDs wired (ground = column or ground = row)? What does the following do?

  for (int row = 0; row < 8; row++)
  {
    for (int col = 0; col < 8; col++)
    {
      digitalWrite(latchPinA2, LOW);
      digitalWrite(latchPinA1, LOW);

      shiftOut(dataPinA2, clockPinA2, MSBFIRST, ledMatrixA[row]);
      shiftOut(dataPinA1, clockPinA1, MSBFIRST, ledMatrixA[col + 1]);

      digitalWrite(latchPinA2, HIGH);
      digitalWrite(latchPinA1, HIGH);

      delay(100);
    }
  }