"Pine64 USB JTAG Adapter + OpenOCD + PineTime" should it work?
#5
I'm going on a little reading and informed guesswork, so treat what I'm about to say accordingly.

I would investigate the 5V issue first - if the adapter sends 5V to a device that can't tolerate it you will cause permanent damage. That's how people end up with dead GPIO pins on their Pi, or even a dead Pi. The adapter schematic doesn't show a 3.3V regulator, and I don't know if the FT232H has an internal one and a level config option. If it doesn't then you'll need to look for a bidirectional level converter to move the signals between 5V and 3.3V.

https://www.allaboutcircuits.com/technic...debugging/
https://plaes.org/technotes/embedded-sys...e-hacking/

Based on the above it looks like you need both TDI and TDO (via a resistor) connected to SWDIO. The first one has some detail on what each bit of the config actually means too.
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RE: "Pine64 USB JTAG Adapter + OpenOCD + PineTime" should it work? - by wibble - 03-02-2022, 05:58 AM

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