I made a little USB board to interface with the 24-pin connector, but I
stupidly supplied 5V to USBHPEN (GPIO 89) instead of 3.3V. I did that for a
good 30 minutes before I realized my mistake. When I plug in the USB
/dev/ttyUSB0 doesn't come up, so I'm pretty sure I've killed that pin, but
the USB data pins should still be good.
Is there a way to enable the port in software somehow?
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