Sorry, I mainly developped the software for emulators that runs on Windows, not on raspberry...
The vJoy driver (virtual joystick) I use in the BFF is only available on x86 or x64 Windows computers.
As a side exploratory project, and since forcefeedback stuff is now a lot easier to develop that it used to be 2 years ago, it is possible to transform an Arduino to a forcefeedback racing wheel device.
Some people have been successfull to use STM32 boards for DIY steering wheels, and I personnally played with a Leonardo and a Due to make it seen by Windows as a steering wheel (no vJoy in this case).
This could perhaps make it compatible with a raspberry or a console compatible wheel, faking a commercial PID/VID.
The Leonardo board is a bit limited in its processing power to handle complex forcefeeback stuff with advanced digital filters, USB communication, and PC communication (to transfer configuration data and lights).
The main issue for other more powerfull boards like the Due or STM32 boards is they are 3.3V microcontrollers, thus analog or digital 5V level signals from our arcade cabinets must be shifted back to 3.3V.