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XPost: sci.electronics.design
On 16 Jan 2024 13:58:13 GMT, Michael Schwingen
wrote:
>On 2024-01-15, john larkin wrote:
>> The Raspberry Pi pico has its 3-pin SWD debug port. I'd like to
>> connect it to the 40-pin header on the back of the Pi400, to use the
>> 400 as the dev/debug platform for some RP2040-based boxes.
>
>What debug software are you planning to use? OpenOCD?
Whatever the pi400 uses. I'll let a programmer deal with that.
>
>The pinout seems to be quite flexible - look at
>interface/raspberrypi-gpio-connector.cfg in the OpenOCD sources /
>distribution.
>
>If you want something nice with level translation that handles power
>sequencing between Pi and Target board, the JTAG Hat should do what you
>want:
>
>https://github.com/mschwingen/hardware/tree/master/JTAG_hat
>
>I think this should also work an a pi400.
Is there a schematic somewhere?
I plan to make my own board, as described. I'm especially interested
in scoping realtime performance.
>
>cu
>Michael
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