Example #1
0
  // Ground Sensors *Used in Line Follower* Bottom of Bot
  public void readLightSensors(OutputStream out, byte[] buf, int len) {
    try {
      int leftLightDetection = leftLightSensor.sample();
      int rightLightDetection = rightLightSensor.sample();

      // Convert the 10bit numbers to 8 bit
      int groundRight = (rightLightDetection >> 2);
      int groundLeft = (leftLightDetection >> 2);

      writeCRLF(out, "o, " + groundRight + ", " + groundLeft);
    } catch (Throwable t) {
      t.printStackTrace();
    }
  }
Example #2
0
  public static void run(String args[]) {
    try {
      System.out.println("WheelWatcher WW-01");

      // Get the user interface objects
      Display display = IntelliBrain.getLcdDisplay();
      AnalogInput thumbwheel = IntelliBrain.getThumbWheel();

      // Get the servo object and give it a Motor interface by encapsulating it
      // in a ContinuousRotationServo object.
      Motor motor = new ContinuousRotationServo(IntelliBrain.getServo(3), true);

      motor.setPower(1);
      motor.setPower(0);
      motor.setPower(-1);
      Thread.sleep(2000);

      // Get a shaft encoder object and initialize it with the two digital inputs it uses.
      IntelliBrainShaftEncoder encoder = IntelliBrain.getShaftEncoder(1);
      encoder.initialize(IntelliBrain.getDigitalIO(11), IntelliBrain.getDigitalIO(10));

      int previousCounts = 0;
      int power = 0;
      int rpm = 0;
      long time = System.currentTimeMillis();
      while (true) {
        // Calculate RPM (Revolutions Per Minute)
        // RPM = countsThisIteration * iterationsPerMinute / countsPerRevolution
        // countsThisIteration - current encoder counts minus previous count
        // iterationsPerMinute = 600 - ten loops per second
        // countsPerRevolution = 128 - fixed by design of sensor/codewheel
        int counts = encoder.getCounts();
        display.print(1, "RPM: " + ((counts - previousCounts) * 600) / 128);
        previousCounts = counts;

        // Read the thumbwheel and scale the value to set the motor power.
        int velocity = (thumbwheel.sample() - 512) / 31;
        while (velocity == 3 || velocity == 4) {
          if (velocity == 3) velocity = (thumbwheel.sample() - 512) / 31;
          else velocity = -(thumbwheel.sample() - 512) / 31;

          // counts and rpm logic
          counts = encoder.getCounts();
          previousCounts = counts;
          rpm = ((counts - previousCounts) * 600) / 128;
          display.print(0, "RPM: " + rpm);

          // governer logic
          power += (velocity - (rpm / 16.25));

          // limiter
          if (power > 16) power = 16;
          if (power < -16) power = -16;
          display.print(0, "Power: " + power);

          // set power
          motor.setPower(power);

          time += 100;
          Thread.sleep(time - System.currentTimeMillis());
        }
        motor.setPower(velocity);
        display.print(0, "Power: " + velocity);

        // Calculate sleep time so the next iteration starts 1/2 second after the
        // the previous one.
        time += 100;
        Thread.sleep(time - System.currentTimeMillis());
      }
    } catch (Throwable t) {
      // Display a stack trace if an exception occurs.
      t.printStackTrace();
    }
  }