8BitDo USB

Development
1

Still investigating the driver area:)

I’ve got a 8BitDo SN30 pro (USB) and the QuirkyDevices part need an update to recognize that gamepad.

So far a success because now my SimpleJoystick program is recognizing it:

2025-06-05_00-20
2025-06-05_00-20969×613 58.8 KB

I will look in more details later to clean up everything :slight_smile:

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2

Having double checked without my changes, the gamepad is recognized, so nothing to do here.

So now I will investigate how to have it working under non-native applications like ESDE/retroarch (I guess some translations are missing between BeAPI and other libs)

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You can check libsdl2 as a reference of how this is used in third party programms

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I’ve made a quick test with SDL2:

  • The gamepad is recognized as SDL_Joystick
  • The gamepad is not recognized as SDL_GameController (which might be one of the reason it’s not recognized in Retroarch)

My second gamepad which is more generic is not recognized as SDL_GameController but it’s recognized under retroarch

So I’m not sure if it’s relative to SDL2 or RetroArch. But at least, I would say SDL2 at the moment because I’ve seen that there’s a db mapping " gamecontrollerdb.txt" to recognize the controllers by platforms for SDL2

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I think using this database requires a way to know the USB device and vendor ID for the controller, which the Haiku API doesn’t currently provide or doesn’t implement. There is only a GetDeviceName function (Making sure you're not a bot!) and even that just returns a very generic “USB Joystick 1” or something like that.

So that would require:

  • Adding a new API to BJoystick
  • Adding a new ioctl to joystick devices so the drivers can return the information
  • Wiring the BJoystick class to use the ioctl
  • Implementing the new ioctl in the ubb_hid joystick driver
  • Adjusting SDL to make use of the new API in BJoystick
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Ok thanks for giving these detailed information.

Indeed the current method GetDeviceName is returning something like usb/0, usb/1, etc