Download this project:

git clone --recurse-submodules https://github.com/dukelec/cdcam.git

CDBUS GUI Tool: https://github.com/dukelec/cdbus_gui

In the current configuration, the frame rate of 800x600 pictures is tested at 10 fps. (Restricted by the performance of the STM32G0 chip.)

Default sensor: OV2640.

Notes:
After modifying the configuration, write 1 to save_conf to save the configuration to flash.
If you need to restore the default configuration, change magic_code to another value and save it to flash. Then reapply power.

Schematic: cdcam_sch.pdf