TMDSEMU200-U: The measured lengths of the JTAG IR and DR scan-paths are invalid.

Lukas Blenk

Part Number: TMDSEMU200-U
Other Parts Discussed in Thread: AMIC110

Some time ago my XDS200 Debug Probe broke. (Always got Cable broken far from Device or something like that.)

So the old one was a Spectrum Digital Inc. XDS200 P/N: 516410-0001A.

I re ordered a new one and i got a Blackhawk TMDSEMU200-U. (Seems to be the same, since the Sectrum Digital also has the naming TMDSEMU200-U)

EDIT: I should also mention if i use a diffrent XDS200 (Spectrum) everything works.

I now get some errors:

-----[An error has occurred and this utility has aborted]--------------------

This error is generated by TI's USCIF driver or utilities.

The value is '-230' (0xffffff1a).
The title is 'SC_ERR_PATH_MEASURE'.

The explanation is:
The measured lengths of the JTAG IR and DR scan-paths are invalid.
This indicates that an error exists in the link-delay or scan-path.

[End: Texas Instruments XDS2xx USB Debug Probe_0]

Some one knows why this message appears and how to fix this?

Some more Infos:

Code Composer Studio Version: 10.4.0.0000

Driver Emulator: Vendor: Texas Instruments Incorporated Version: 6.0.3.1

Driver User: Vendor: Texas Instruments Incorporated Versoin: 6.0.3.1

I tested with our custom Board and with the AMIC110 ICE EVM. Both work with only the Spectrum XDS200.

over 2 years ago

0 peaves over 2 years ago

TI__Guru 58135 points

You are the second to report this issue. We discussed this with Black Hawk after the first report and they say their debugger is effectively the same design as the Spectrum debugger. I sent an email to the AMIC110 EVM designer after seeing your post, but haven't heard from him yet. I was hoping he may have some insight on what could be causing this issue.

It sounds like you may still have access to a functional Spectrum debugger. If so, can you capture some JTAG signal waveforms with an oscilloscope to see if you observe any obvious differences as the debugger is tryin to connect to the AMIC110 device.

This may help him understand what is happening.

0 Lukas Blenk over 2 years ago in reply to peaves

Prodigy 60 points

Sry had some trubles with my usb c dock at first.

Here are the Captures: drive.google.com/.../view

I don't have a Osciloscope with much Memory so the Captures are short.

0 peaves over 2 years ago in reply to Lukas Blenk

TI__Guru 58135 points

We are not allowed to access someone's google drive. You will need to insert them into this thread.

Regards,
Paul

0 Lukas Blenk over 2 years ago in reply to peaves

Prodigy 60 points

Ti XDS200 SpectrumDigital vs Blackhawk.zip

0 peaves over 2 years ago in reply to Lukas Blenk

TI__Guru 58135 points

There is no context in these snapshots. For example, there is no mention which scope channel represents the signal name used in the image name and doesn't say what the other channel is connected to.

The EMU signals are sampled on the rising edge of TRSTn, so you should show each of them relative to rising edge of TRSTn.

All of the other JTAG signals are synchronous to TCK, so you need to show these signal relative to TCK.

Regards,
Paul

0 Lukas Blenk over 2 years ago in reply to peaves

Prodigy 60 points

I will try to capture that on Friday then i should get another Osciloscope with more Memory.

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TMDSEMU200-U: The measured lengths of the JTAG IR and DR scan-paths are invalid.