I have created my own Virtual joystick project

[tuxcomputers]

Using your USB device creation script and information from other locations I have turned the Zero into a Virtual Joystick with 32 buttons that can be triggered by the GPIO pins

https://github.com/tuxcomputers/Raspberrypi_joystick

I found the data your project sends for the joystick events was totally wrong for me.

https://github.com/tuxcomputers/Raspberrypi_joystick/blob/main/about_joysticks.md

[milador]

I updated the python code to correct the format of sent data. The order of buttons and joystick bytes were reversed.

Great work. Would you like to add your updated code to my repository? We can have 3 versions : 8 buttons version , 16 buttons version , and your 32 button version.

Let me know if you have time to add a bit more instructions.

[gdsports]

The HID report descriptor declares the axes first then the buttons so the script look wrong now. The HID report descriptor parser at http://eleccelerator.com/usbdescreqparser/ shows the following.

0x05, 0x01,        // Usage Page (Generic Desktop Ctrls)
0x09, 0x04,        // Usage (Joystick)
0xA1, 0x01,        // Collection (Application)
0x15, 0x81,        //   Logical Minimum (-127)
0x25, 0x7F,        //   Logical Maximum (127)
0x09, 0x01,        //   Usage (Pointer)
0xA1, 0x00,        //   Collection (Physical)
0x09, 0x30,        //     Usage (X)
0x09, 0x31,        //     Usage (Y)
0x75, 0x08,        //     Report Size (8)
0x95, 0x02,        //     Report Count (2)
0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0,              //   End Collection
0x05, 0x09,        //   Usage Page (Button)
0x19, 0x01,        //   Usage Minimum (0x01)
0x29, 0x08,        //   Usage Maximum (0x08)
0x15, 0x00,        //   Logical Minimum (0)
0x25, 0x01,        //   Logical Maximum (1)
0x75, 0x01,        //   Report Size (1)
0x95, 0x08,        //   Report Count (8)
0x81, 0x02,        //   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0,              // End Collection

EDIT: The first two bytes are X and Y axes and the last byte is the button bit map. (Fixed a bug in my comment.)

I tinkered with the descriptors but never could get XAC to accept it as a joystick. But the joystick works when connected to Ubuntu Linux.

I am working on a gamepad (2 sticks, 1 dpad, 14 buttons) and will PR it when ready. Not useful for XAC but might be useful for PC or consoles.

[milador]

@gdsports @tuxcomputers I found the issue and corrected the order. I had the incorrect code pushed to github. It's corrected now. Please check and let me know. Thanks

[gdsports]

8_buttons_keyboard.py works fine now.

[milador]

Thanks again @gdsports for testing. I close this issue now.