// Presets for switch 1 to change direction
volatile bool state1 = 0;  // 0 = CCW, 1 = CW
volatile bool SW1;
volatile bool preSW1 = 1;  // preset = 1 to start at CW

void setup() {
  // Set pin D3 as output (bit 4) and pin D2 as input (bit 3)
  DDRD = 0b00001000;
  // Enable pull-up resistor on pin D0 (bit 4)
  PORTD = 0b00000100;
  // Initialize serial communication at 9600 baud
  Serial.begin(9600);
}

void loop() {
  // Read the state of the switch connected to pin D2 (bit 4)
  SW1 = ((PIND & (1 << 2)) >> 2);

  // Detect a rising edge (switch release)
  if (SW1 == 1 && preSW1 == 0) {
    // Toggle the direction state
    if (state1 == 0) {
      state1 = 1;
      // Set pin D3 high (LED On)
      PORTD |= (1 << 3);
    } else {
      state1 = 0;
      // Set pin D3 low (LED Off)
      PORTD &= ~(1 << 3);
    }
  }
  // Update previous switch state
  preSW1 = SW1;

  // Print current direction state for debugging
  Serial.println(state1);
}