Controller Switching Using .getJoystickName()

EPloss · February 8, 2024, 2:14am

Hello, all!

We often switch between controllers when testing the code, so this year we tried to add code that automatically switches the button/axis IDs depending on the controller. The issue is that (and we’ve had this problem with past versions of WPILib as well) when we call the .getJoystickName() function, the watcher in the debugger returns " “” ". Anyone have any ideas? I copy/pasted part of our code below for reference.

if (DriverStation.getJoystickName(ElectronicsIDs.DriverControllerPort).equals(“Logitech Extreme 3D”)) {
driveSub.setDefaultCommand(
// The left stick controls translation of the robot.
// Turning is controlled by the X axis of the right stick.
new DriveRobot(
driveSub,
driverController,
LogitechExtreme3DConstants.AxisX, LogitechExtreme3DConstants.AxisY, LogitechExtreme3DConstants.AxisZRotate,
true));

Thad_House · February 8, 2024, 2:30am

Are you calling that during robotInit()? Because of how those values are sent, its very possible for them to be empty during robotInit().

EPloss · February 8, 2024, 4:21am

No, I’m calling it in the configureButtonBindings() function in RobotContainer.

Thad_House · February 8, 2024, 4:27am

That is called from robotInit(). Joysticks are very likely not valid at that point. You have to keep continuously checking to see if a value actually exists as code is running.

JumpingPistachio · February 8, 2024, 4:56am

If you want, we implemented something quite similar this past offseason. We currently have 2 versions of it, the first one does work but the other, GenericGamepad2.java hasn’t been fully tested yet (oops). Feel free to take a look, or even yoink the code for yourself. I hope you’re having a good day/night!

truher · February 8, 2024, 5:05am

100 use a control proxy that queries the controller name periodically and switches the delegate to match. you can’t count on the controller names at startup.

github.com

Team100/all24/blob/42be57b8502799cc2182100e8b6eb7d309858507/lib/src/main/java/org/team100/lib/hid/OperatorControlProxy.java#L12


      
          
          import org.team100.lib.util.Util;
          
          import edu.wpi.first.wpilibj.DriverStation;
          import edu.wpi.first.wpilibj.Notifier;
          
          /**
           * Checks periodically for changes in the HID connected to port 1, and changes
           * the operator control implementation to match.
           */
          public class OperatorControlProxy implements OperatorControl {
              private static class NoOperatorControl implements OperatorControl {
              }
          
              private static final int kPort = 1;
              private static final double kFreq = 1;
          
              private final Notifier m_notifier;
              private String m_name;
              private OperatorControl m_operatorControl;

system · February 7, 2025, 5:05am

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