SoundCtrCarClap

import lejos.nxt.*;
/**
 * The locomotions of a  LEGO 9797 car is controlled by
 * sound detected through a microphone on port 1.
 *
 * @author  Ole Caprani
 * @version 23.08.07
 */
public class SoundCtrCar
{
    private static SoundSensor sound = new SoundSensor(SensorPort.S1);
    private static boolean running = true;
    private static DataLogger dl = new DataLogger("Sample.txt");

    private static  void waitForLoudSound() throws Exception
    {
        if (running) {
            int soundLevel1;
            int soundLevel2;
            int soundLevel3;
            do
            {
                soundLevel1 = sound.readValue();
                dl.writeSample(soundLevel1);
                Thread.sleep(25);
                soundLevel2 = sound.readValue();
                dl.writeSample(soundLevel2);
                Thread.sleep(250);
                soundLevel3 = sound.readValue();
                dl.writeSample(soundLevel3);
                LCD.drawString("" + soundLevel1 + " " + soundLevel2 + " " + soundLevel3, 0, 0);
            }
            while ((soundLevel1 >= 50 || soundLevel2 <= 85 || soundLevel3 >= 50) && running);
        }
    }

    public static void main(String [] args) throws Exception
    {
        Button.ESCAPE.addButtonListener(new ButtonListener() {
            public void buttonReleased(Button b) {
                LCD.drawString("ESCAPE pressed", 0, 0);
            }
            public void buttonPressed(Button b) {
                running = false;
            }
        });

        LCD.drawString("dB level: ",0,0);
        LCD.refresh();

        while (! Button.ESCAPE.isDown() && running)
        {
            waitForLoudSound();
            LCD.drawString("Forward ",0,1);
            Car.forward(75, 75);

            waitForLoudSound();
            LCD.drawString("Right   ",0,1);
            Car.forward(75, 0);

            waitForLoudSound();
            LCD.drawString("Left    ",0,1);
            Car.forward(0, 75);

            waitForLoudSound();
            LCD.drawString("Stop    ",0,1);
            Car.stop();
       }
       dl.close();
       Car.stop();
       LCD.clear();
       LCD.drawString("Program stopped", 0, 0);
       Thread.sleep(2000);
   }
}