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grandideastudio / jtagulator

JTAGulator: Assisted discovery of on-chip debug interfaces
https://grandideastudio.com/portfolio/security/jtagulator/
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is there any way to debug why uart passthrough is not outputting when doing tx rx connected together test(for echo test)? #61

Closed kocoman1 closed 1 year ago

kocoman1 commented 1 year ago

is there any way to debug why uart passthrough is not outputting when doing tx rx connected together test(for echo test)? thx

joegrand commented 1 year ago

Have you enabled Local Echo when you started the Passthrough command?

Enable local echo? [y/N] Y

https://github.com/grandideastudio/jtagulator/blob/master/JTAGulator.spin#L1996

It should actually work either way - I've just tested it - but may depend on the settings in your local terminal program.

If you're still not able to get it working, please submit more details as per the FAQ item 10.

joegrand commented 1 year ago
Screen Shot 2023-04-15 at 6 21 53 PM
joegrand commented 1 year ago

No response from OP, assuming the issue was solved.

kocoman1 commented 12 months ago

sorry I didn't have time to look at it till now..

Its giving me a▒aaa▒aa its receiving ▒, should i need some logic probe to debug it? what chip is broken do you think? thanks

joegrand commented 12 months ago

Are you using an officially manufactured JTAGulator or are you building your own? You can try to follow the test procedure to see if that narrows down the problem. If you're able to properly communicate with the JTAGulator using a terminal program, it's likely not UART hardware related and could be an I/O connection problem. Without knowing anything about your setup, hardware, baud rate you're testing with, etc., I'm really not able to give you any specific suggestions.