How to write a program to define a gamepad and use it?

[Navid T]

avr usb steering wheel

Hi
I'm going to make an advanced pc steering wheel, but i don't know whats protocol of this, and how can i write a program to define a gamepad and use it in games. can you give me some information about it? or some links and samples please??
Best regards

 

[shg]

Computer Steering Wheel

The protocol is either USB HID class, or none at all.
In the former case You will have to implement an USB protocol device.
http://www.usb.org/developers/hidpage/
http://en.wikipedia.org/wiki/USB_Human_Interface_Device_class
This could be done even without a specialized USB controller, a firmware-only driver and an AVR microcontroller are enough:
http://www.sensorwiki.org/index.php/Building_a_USB_sensor_interface
I saw a few AVR based joystick/steering wheel projects on the net, just google a bit, You should find something that will fit Your needs.

The latter case is simply a potentiometer connected do PC's game port.