package frc.robot;

// Import the classes of objects you will use
import edu.wpi.first.wpilibj.TimedRobot;
import edu.wpi.first.wpilibj.XboxController;
import edu.wpi.first.wpilibj.GenericHID.Hand;
import edu.wpi.first.wpilibj.Timer;
import com.ctre.phoenix.motorcontrol.can.*;
import edu.wpi.first.wpilibj.Ultrasonic;
import edu.wpi.first.wpilibj.CameraServer;

import edu.wpi.first.wpilibj.livewindow.LiveWindow;

import edu.wpi.first.wpilibj.smartdashboard.SendableChooser;
import edu.wpi.first.wpilibj.smartdashboard.SmartDashboard;

 * The VM is configured to automatically run this class, and to call the
 * functions corresponding to each mode, as described in the TimedRobot
 * documentation. If you change the name of this class or the package after
 * creating this project, you must also update the build.gradle file in the
 * project.
public class Robot extends TimedRobot {
  // Create instances of each object
  private static final String kDefaultAuto = "Default";
  private static final String kCustomAuto = "My Auto";
  private String m_autoSelected;
  private final SendableChooser<String> m_chooser = new SendableChooser<>();
  private XboxController xbox;
  private Timer timer;
  private WPI_TalonSRX m_rearLeft;
  private WPI_TalonSRX m_rearRight;
  private DifferentialDrive m_drive;
  private boolean    f_safetyStop;
  private Ultrasonic f_ultrasonic;

   * This function is run when the robot is first started up and should be
   * used for any initialization code.
  public void robotInit() {
    // initialize the objects and connect them to their underlying hardware
    m_chooser.addDefault("Default Auto", kDefaultAuto);
    m_chooser.addObject("My Auto", kCustomAuto);
    SmartDashboard.putData("Auto choices", m_chooser);
    xbox = new XboxController(0);
    timer = new Timer();
    m_rearLeft = new WPI_TalonSRX(4);
    m_rearRight = new WPI_TalonSRX(3);
    m_drive = new DifferentialDrive(m_rearLeft, m_rearRight);
    f_ultrasonic = new Ultrasonic(1,0); // ping, echo

   * This function is called every robot packet, no matter the mode. Use
   * this for items like diagnostics that you want ran during disabled,
   * autonomous, teleoperated and test.
   * <p>This runs after the mode specific periodic functions, but before
   * LiveWindow and SmartDashboard integrated updating.
  public void robotPeriodic() {

   * This autonomous (along with the chooser code above) shows how to select
   * between different autonomous modes using the dashboard. The sendable
   * chooser code works with the Java SmartDashboard. If you prefer the
   * LabVIEW Dashboard, remove all of the chooser code and uncomment the
   * getString line to get the auto name from the text box below the Gyro
   * <p>You can add additional auto modes by adding additional comparisons to
   * the switch structure below with additional strings. If using the
   * SendableChooser make sure to add them to the chooser code above as well.
  public void autonomousInit() {
    m_autoSelected = m_chooser.getSelected();
    // autoSelected = SmartDashboard.getString("Auto Selector",
    // defaultAuto);
    System.out.println("Auto selected: " + m_autoSelected);

  /*public void teleopInit() {


   * This function is called periodically during autonomous.
  public void autonomousPeriodic() {
    if (timer.get() < 2.0) {
      m_drive.curvatureDrive(0.1, 0.0, false);
      m_drive.curvatureDrive(0.0, 0.0,false);
    switch (m_autoSelected) {
      case kCustomAuto:
        // Put custom auto code here
      case kDefaultAuto:
        // Put default auto code here

   * This function is called periodically during operator control.
  public void teleopPeriodic() {

    // Use front-mounted ultrasonic sensor to stop robot
    // if it gets too close to an obstacle
    double f_range = f_ultrasonic.getRangeInches();
    if (f_ultrasonic.isRangeValid()) {
       if ((f_range < 15.0) && !f_safetyStop) {
          System.out.println("Safety stopped due to front obstacle");
          f_safetyStop = true;
       } else if (f_range >= 15.0 && f_safetyStop) {
          f_safetyStop = false;

    // Use controller joysticks to set drive speed, but
    // safety stop if too close to an obstacle
    double leftSpeed  = -0.5*xbox.getY(Hand.kLeft);
    double rightSpeed = -0.5*xbox.getY(Hand.kRight);
    // If there's an obstacle in front of us, don't
    // allow any more forward motion
    if (f_safetyStop && 
        (leftSpeed > 0.0) && (rightSpeed > 0.0)) {
    } else {
      // otherwise, set motors according to joysticks
       m_drive.tankDrive(leftSpeed, rightSpeed);

   * This function is called periodically during test mode.
  public void testPeriodic() {

Last modified 20 months ago Last modified on Oct 7, 2019, 9:51:23 PM