Systemcore alpha USB Issue With Canivore and Log Drive

[ElliotScher]

FRC 190 ran a Systemcore alpha unit on our offseason robot at various competitions over the last month and we discovered an interesting anomaly. We had 2 canivores on our offseason robot (yes, I know, it's definitely unorthodox 😄) and they were plugged into 2 of the USB ports on the Systemcore. At our event this past weekend, our Canivores both began exhibiting a strange behavior. Both would simultaneously blink red for ~10 seconds and then blink green again. This process repeated until we moved the Canivores to the other two USB ports on the Systemcore, where the behavior stopped. Following this, we tried to put a logging USB drive in the ports the canivores were previously in, and the drive got excessively hot. We ended up merging one of the canivore's devices into a Systemcore bus so we're only running one now, but I thought I'd report here to see what people thought. There were a couple of hypotheses about why this may have been occuring, one of which was that the USB ports were potentially being damaged due to ESD, the device is directly underneath our robot's roller floor.

Attached is the support bundle. From the dmesg log, it appears that both canivores ("Drive" and "Extension") are repeatedly re-connecting.
support-bundle-robot-20261024-144720.zip