This repository contains hard- and software for building a USB adapter for the MS SideWinder 3D Pro joystick.
The joystick uses a proprietary protocol over the analg gameport which makes it impossible to use standard off the shelf gameport USB adapters. The protocol works by sending a state vector over the three button lines of the gameport. There is no analog transmission taking place. More details can be found in US patent 5628686A or in the Linux driver implementation.
The software is taken from sw3dprousb with permission from the author. All credit regarding the software goes to the original author.
The ATmega32u4 controller comes with a pre-configured bootloader which is DFU compatible. This allows to flash the firmware via USB without the need for an ICSP port.
The flash-firmware.sh script can be used to flash the firmware on a newly assembled board using the dfu-programmer utility. This should work out of the box on Linux systems provided that there is only one DFU device present.
The hardware is based on a minimal design around the ATmega32u4 microcontroller and follows the suggestions from the sw3dprousb project as well as from this DescentBB thread.
