Quote:
Originally Posted by Ozuru
Read the error code. It's telling you to look at a line in your Robot.java - pastebin your robot.java.
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I am having the same problem. The specific error that is given "ERROR Unhandled exception: java.lang.NullPointerException at [edu.wpi.first.wpilibj.PWM.startLiveWindowMode(PWM. java:484), org.usfirst.frc.team4085.robot.Robot.teleopPeriodi c(Robot.java:117), edu.wpi.first.wpilibj.IterativeRobot.startCompetit ion(IterativeRobot.java:150), edu.wpi.first.wpilibj.RobotBase.main(RobotBase.jav a:234)]"
Can you help me?
Code:
package org.usfirst.frc.team4085.robot;
import java.io.IOException;
import edu.wpi.first.wpilibj.IterativeRobot;
import edu.wpi.first.wpilibj.BuiltInAccelerometer;
import edu.wpi.first.wpilibj.PowerDistributionPanel;
import edu.wpi.first.wpilibj.smartdashboard.SmartDashboard;
import edu.wpi.first.wpilibj.command.Command;
import edu.wpi.first.wpilibj.command.Scheduler;
import edu.wpi.first.wpilibj.livewindow.LiveWindow;
import edu.wpi.first.wpilibj.livewindow.LiveWindowSendable;
import edu.wpi.first.wpilibj.Talon;
import org.usfirst.frc.team4085.robot.commands.ExampleCommand;
import org.usfirst.frc.team4085.robot.subsystems.ExampleSubsystem;
import edu.wpi.first.wpilibj.*;
/**
* The VM is configured to automatically run this class, and to call the
* functions corresponding to each mode, as described in the IterativeRobot
* documentation. If you change the name of this class or the package after
* creating this project, you must also update the manifest file in the resource
* directory.
*/
public class Robot extends IterativeRobot {
public static final ExampleSubsystem exampleSubsystem = new ExampleSubsystem();
public static OI oi;
Command autonomousCommand;
Joystick lstick = new Joystick(0);
Joystick rstick = new Joystick(1);
PowerDistributionPanel PDP = new PowerDistributionPanel();
BuiltInAccelerometer Accel = new BuiltInAccelerometer();
LiveWindow Window = new LiveWindow();
Talon Left = new Talon(0);
Talon Right = new Talon(1);
RobotDrive chassis = new RobotDrive(Left,Right);
SmartDashboard smart = new SmartDashboard();
/**
* This function is run when the robot is first started up and should bDahe
* used for any initialization code.
*/
public void robotInit() {
oi = new OI();
// instantiate the command used for the autonomous period
autonomousCommand = new ExampleCommand();
}
public void disabledPeriodic() {
Scheduler.getInstance().run();
}
public void autonomousInit() {
// schedule the autonomous command (example)
if (autonomousCommand != null) autonomousCommand.start();
}
/**
* This function is called periodically during autonomous
*/
public void autonomousPeriodic() {
Scheduler.getInstance().run();
}
public void teleopInit() {
// This makes sure that the autonomous stops running when
// teleop starts running. If you want the autonomous to
// continue until interrupted by another command, remove
// this line or comment it out.
if (autonomousCommand != null) autonomousCommand.cancel();
}
/**
* This function is called when the disabled button is hit.
* You can use it to reset subsystems before shutting down.
*/
public void disabledInit(){
}
/**
* This function is called periodically during operator control
*/
@SuppressWarnings({"static-access" })
public void teleopPeriodic() {
Scheduler.getInstance().run();
double counter = 0.0;
while(isEnabled())
{
smart.putNumber("Timer", counter++);
}
while(true)
{
chassis.setSafetyEnabled(false);
chassis.tankDrive(lstick, rstick);
smart.putNumber("The X Axis", Accel.getX());
smart.putNumber("The Y Axis", Accel.getY());
smart.putNumber("The Z Axis", Accel.getZ());
smart.putNumber("The Temp of the roboRIO", PDP.getTemperature());
smart.putNumber("This is the test", smart.getNumber("Put a number here", 1));
Window.setEnabled(isEnabled());
Left.startLiveWindowMode();
Right.startLiveWindowMode();
Accel.startLiveWindowMode();
PDP.startLiveWindowMode();
smart.putNumber("Total Current", PDP.getTotalCurrent());
smart.putNumber("Total Energy", PDP.getTotalEnergy());
smart.putNumber(" Total Power", PDP.getTotalPower());
smart.putNumber("Match Time", Timer.getMatchTime());
int inChar = 0;
System.out.println("Enter a Character:");
try {
inChar = System.in.read();
System.out.print("You entered ");
System.out.println(inChar);
}
catch (IOException e){
System.out.println("Error reading from user");
}
int outChar = 5;
if (inChar == outChar ){
System.out.println("Hello World");
}
else
{
System.out.println("Not J");
}
}
}
/**
* This function is called periodically during test mode
*/
public void testPeriodic() {
LiveWindow.run();
}
}
Looks like it will be to your advantage to keep the Refs happy.
Remember, Donuts go a long way toward that end! - billbo911 [more] 
15-01-2015, 11:05
Linear Mode
