A open source project can be found here, it includes pin access to:
* FPGA JTAG* UART 3.3V with pin compatible FT232 socket* Power 5V over USB-C* 5 Button inputs* Buffered video output and socket for USB Videograbber* Digital 14 bit video out header with hsync vsync and clk.*
the pcb layout has been tested and seems to work.
<blockquote>Very basic fanout of pins to 2.54mm headers with a socket for a Video grabber and FT232 adapter and buttons. by gamerpaddy
https://oshwlab.com/gamerpaddy/d8x3c-backpack-usb</blockquote><blockquote>Professional adapter with integrated Video grabber and USB/UART bridge built in including a FFC connector for pin fanout and buttons. by TOA-HI / Killy.THI
https://oshwlabgithub.com/gamerpaddyTOA-HI/d8x3cDali-backpackTech-usbD8X3C-Thermal-Camera-Backpack</blockquote>
== Sending Serial Commands directly over UART ==
Sending Serial commands directly over UART to the core requires some additional bytes.
The packet structure is as follows (Strip spaces, commands are allways uppercase and 3 chars)
<STX> <LENGTH1> <LENGTH2> Command, Value, Checksum <ETX>