How to use the Official GameCube Controller Adapter for Wii U in Dolphin

THIS IS A WORK IN PROGRESS

OS?
If you have the vJoy drivers installed, the GC pad will act like a generic gamepad which can be configured in Dolphin like any other controller. To turn off Dolphin's in-built support, go into the "Controller Settings" and uncheck "Direct Connect". Press the "Configure" button and set up the gamepad.

Driver installation
If you would like to use Dolphin's in-built driver, uninstall the vJoy drivers and unplug the GC adapter. 1. Close Dolphin if it is running. 2. Plug in the GC adapter. 3. Download Zadig and start it up. 4. From the "Options" menu in Zadig, select "List All Devices" 5. In the pulldown menu, select "WUP-028". 6. Check that the driver on the left says "HidUsb" and the USB ID is "057E 0337". If it doesn't, follow the driver removal instructions below. 7. If it is, on the right hand side, select "WinUSB" 8. Click "Replace Driver" 9. Select "Yes" to modify the system driver 10. Press Close at the prompt 11. Close Zadig 12. Start up Dolphin 13. In the "Controller settings", under "GameCube Adapter", it should have the option of "Direct Connect" checked. Check it if it is unchecked. 14. If it does, select "Standard Controller" (or TaruKonga/bongos) in the ports that you have a GC pad plugged into. 15. Press "OK" on the "Controller settings" and start a game.

Playing
The GC pad is auto-configured and calibrated (and cannot be changed). Rumble is supported. Both USB cables might need to be plugged in for wireless controllers and/or rumble. Dolphin supports hot-plug, so the pads can be unplugged and plugged into other ports. If a pad is unplugged from the adapter, Dolphin will use what is configured (PC keyboard/mouse, PC gamepad etc). Ensure that "Standard Controller" or bongos is selected in the "Controller settings". The ports on the adapter correspond to the numbered ports in the "Controller Settings."

Adapter not detected
If Dolphin's controller setting says that the adapter is not detected, try inserting the GC adapter into another USB port (try USB 2.0 ports and USB 3.0 ports). Dolphin will detect GC adapters that are plugged into USB hubs.

Driver removal
If the controller settings says "Driver not detected", go to the Windows "Device Manager", and look for the "WUP-028" device which is usually under the "Universal Serial Bus devices". Select the "Driver" tab. Click "Uninstall". Select "Delete the driver software for this device". Click "OK". Then unplug and re-insert the GC adapter. The steps for driver installation can now be followed.

Other operating systems
The WUP-028 (057E 0337) GC adapter has to be accessible by libusb for Dolphin to make use of it. In Windows, Driver signing enforcement might need to be disabled.