Gravis GrIP to HID converter
A few years ago (too many years to remember when I started this, in fact), I wrote down some notes about the Gravis Gamepad Pro and the protocol it uses to communicate with a computer over the simple joystick port.
Finally, I have completed the work on making an interface to use these gamepads with an USB port! The interface can handle up to 4 gamepads, and make them show as normal USB HID devices to the computer, which means no specific drivers are needed. Just plug and play!
It is based on an AT90USB162 microcontroller. I originally started experimenting with various other things, but it turns out, this old and simple microcontroller is good enough for this task, and writing the code wasn't so hard.
The schematics, PCB files and sourcecode can be found in my avrstuff repository.
It is also possible to buy boards from me if you want to, the cost is 15€ (that covers the components and PCB costs and the shipping). I made a first batch of 10 boards, but I could build more if there is enough demand for it. Just send me an email to order one. Please do not send me money without asking first, in case there is no stock available I don't want to be owing you money for months or years. If you want to order, remember to give details on where I should ship the thing (I need both your name and your physical address).
