Just a quick update to let you know where we are in production of this board. Parts have been ordered and delivered to our production partner who built a couple of first articles. They are en route to us for verification.
The manufacturing test fixture which is used to both program the firmware onto the board as well as test its functionality has been designed and the PCB is out for fab.
Next up is writing software to control the text fixture. It will run on a Raspberry PI 3 since that computer has the necessary driver to test the Ethernet port on the Pi Platter. The test fixture also uses a PJRC Teensy 3 computer to measure a bunch of analog voltages (including small differential voltages) and control switching transistors on the fixture.