Code changes not deploying to robot?

[Dinnesy]

My team has deployed the following code to our robot:
package org.usfirst.frc.team4968.robot;

import edu.wpi.first.wpilibj.SampleRobot;
import edu.wpi.first.wpilibj.RobotDrive;
import edu.wpi.first.wpilibj.Joystick;
import edu.wpi.first.wpilibj.Timer;

public class Robot extends SampleRobot
{
RobotDrive myRobot; // class that handles basic drive operations
Joystick leftStick; // set to ID 1 in DriverStation
Joystick rightStick; // set to ID 2 in DriverStation
public Robot()
{
myRobot = new RobotDrive(0, 1);
myRobot.setExpiration(0.1);
leftStick = new Joystick(0);
rightStick = new Joystick(1);
}
public void operatorControl()
{
myRobot.setSafetyEnabled(true);
while (isOperatorControl() && isEnabled())
{
myRobot.arcadeDrive(leftStick);
//myRobot.tankDrive(leftStick, rightStick);
Timer.delay(0.005); // wait for a motor update time
}
}
}

Initially, the code was working. However we then tried redeploying the code with a few changes, and the robot stopped working. So, we reverted the code back to EXACTLY what it was when it was working, and redeployed it, but the robot still does not work. I believe this to because by our code is not successfully deploying to the robot, because no matter what we do, nothing seems to change and the robot does not respond. Could someone outline the code deploying process for us to ensure we are not missing anything? Does the build.xml file need to be updated?

[BigJ]

Before doing anything else, try using some System.out.println statements to make sure whether the code is or is not getting updated on the bot.

[Dinnesy]

Originally Posted by BigJ

Before doing anything else, try using some System.out.println statements to make sure whether the code is or is not getting updated on the bot.

We have a very new and inexperienced coder this year and he is not very familiar with system.out.println statements, could you explain how we would do so? Thanks a Lot!

[BigJ]

System.out.println("Hello world"); will print a line of text containing "Hello world" in the console. You can substitute any string for "Hello world".

Then you can look at the console output to see if your text is printing.

[Dinnesy]

Originally Posted by BigJ

System.out.println("Hello world"); will print a line of text containing "Hello world" in the console. You can substitute any string for "Hello world".

Then you can look at the console output to see if your text is printing.

I get the hello world printout infinitely in the console. So, that would imply that there is an issue with my code, however i am not getting any errors, and all of the ports are correct.

[BigJ]

All that means is that you put that statement in a loop (this is okay). More importantly, it means that your code is being deployed and updated properly.

[Jon Stratis]

The posted code is just for driving the robot... Have you verified through the driver station that the joysticks are still connected?. Unplugging them and then plugging them back in while the driver station is up can cause them to no longer be recognized or read.

[Dinnesy]

Originally Posted by Jon Stratis

The posted code is just for driving the robot... Have you verified through the driver station that the joysticks are still connected?. Unplugging them and then plugging them back in while the driver station is up can cause them to no longer be recognized or read.

Yes, they joysticks are connected and the driver station is recognizing all feedback from them.

[notmattlythgoe]

What do the lights on the motor controllers do when you enable the robot?

Also, when posting code, please use code tags to make it easier to read. To use a code tag place a [/code] at the end and a [code] at the beginning. Thanks.

[Dinnesy]

Originally Posted by notmattlythgoe

What do the lights on the motor controllers do when you enable the robot?

Also, when posting code, please use code tags to make it easier to read. To use a code tag place a [/code] at the end and a [code] at the beginning. Thanks.

the light on the motor controllers(talons) do not change when the robot is enabled, they are always flashing orange. I will use the code tag from now on, sorry.

[notmattlythgoe]

Originally Posted by Dinnesy

the light on the motor controllers(talons) do not change when the robot is enabled, they are always flashing orange. I will use the code tag from now on, sorry.

No need to apologize, most people don't know about them. It just makes it easier to read.

The flashing talons means that they are note being communicated with. Can you verify that the talons are plugged into the correct ports and that they are plugged in correctly?