Files
zsa_qmk_firmware/keyboards/ploopyco/trackball/rev1
..

See the main readme for more details.

This is just the rev 1.001-1.004 trackball

Programming QMK-DFU onto the PloopyCo Trackball (Advanced)

If you would rather have DFU on this board, you can use the QMK-DFU bootloader on the device. To do so, you want to run:

make ploopyco/trackball:default:production

Once you have that, youll need to ISP Flash the chip with the new “production” hex file created (or the production hex), and set the fuses:

Fuse Setting
Low 0x52
High 0x99
Extended 0xCB

Original (Caterina) settings:

Fuse Setting
Low 0xFF
High 0xD8
Extended 0xFE

If youre using QMK DFU, youll also need to add BOOTLOADER=qmk-dfu to your keymaps rules.mk file, to ensure that the reboot/reset works correctly. Otherwise, it will jump right back into the firmware, like nothing happened.

Additionally, once youve flashed the qmk-dfu bootloader onto your device, you will no longer be able to use the Arduino IDE to flash the board. Youll need to use the command line or QMK Toolbox to flash it.