Motor Control Example

package edu.wpi.first.wpilibj.examples.motorcontrol;

import edu.wpi.first.wpilibj.Encoder;
import edu.wpi.first.wpilibj.Joystick;
import edu.wpi.first.wpilibj.TimedRobot;
import edu.wpi.first.wpilibj.motorcontrol.PWMSparkMax;
import edu.wpi.first.wpilibj.smartdashboard.SmartDashboard;

/**
 * This sample program shows how to control a motor using a joystick. In the operator control part
 * of the program, the joystick is read and the value is written to the motor.
 *
 * Joystick analog values range from -1 to 1 and motor controller inputs also range from -1 to 1
 * making it easy to work together.
 *
 * In addition, the encoder value of an encoder connected to ports 0 and 1 is consistently sent
 * to the Dashboard.
 */
public class Robot extends TimedRobot {
  private static final int kMotorPort = 0;
  private static final int kJoystickPort = 0;
  private static final int kEncoderPortA = 0;
  private static final int kEncoderPortB = 1;

  private final PWMSparkMax m_motor;
  private final Joystick m_joystick;
  private final Encoder m_encoder;

  public Robot() {
    m_motor = new PWMSparkMax(kMotorPort);
    m_joystick = new Joystick(kJoystickPort);
    m_encoder = new Encoder(kEncoderPortA, kEncoderPortB);
    // Use SetDistancePerPulse to set the multiplier for GetDistance
    // This is set up assuming a 6 inch wheel with a 360 CPR encoder.
    m_encoder.setDistancePerPulse((Math.PI * 6) / 360.0);
  }

  @Override
  public void robotPeriodic() {
    SmartDashboard.putNumber("Encoder", m_encoder.getDistance());
  }

  @Override
  public void teleopPeriodic() {
    m_motor.set(m_joystick.getY());
  }
}