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EVM430-F6736: Communication Loss with HID

Fathi Chelly
Prodigy 50 points
Part Number: EVM430-F6736
Other Parts Discussed in Thread: MSP-FET

Tool/software:

Hello!

I hope this question find you well.

I am actually working on the EVM-F6736.

I successfully generated a code using EMDC and flashed it with CCS (20.0.2).

After that, I disconnected the MSP-FET and wired the setup as described in the online Energy Measurement Technology Guide (version 1.40.00.03).

Then, I launched EMDC, clicked on the MSP icon, and connected successfully. The firmware version was displayed. I went to the 'Results' section and started reading the data, which updates every second, though calibration is still needed. The following image shows the result : 

After one or two minutes, the results stop updating, and the GUI freezes at the last received values. No new data comes in, even though nothing in the system has changed.

I disconnected the HID and repeated the test, but the same issue occurred. The results stream for a while, then suddenly stop.

Do you have any idea what might be causing this?

Thank you in advance for your response! 

I wish you an excellent day!

Best regards,

Fathi Chelly

  • 0
    TI__Expert 5585 points

    Hi Fathi, thanks for the question! That does sound like strange behavior indeed. Can you try installing a clean copy of the GUI tool and see if it still occurs? Also, can you probe on the EVM to see if there is any communication happening through the interface? That should at least let us know where the problem lies.

    -Brian

  • 0 in reply to Brian Dempsey
    Prodigy 50 points

    Hello Brian!

    First of all, thank you for your prompt response.

    Actually something interesting happened.

    I ran the same test today, under the same conditions as yesterday without changing anything, and everything is working correctly this time. The data has been updating continuously without interruption for the past 20 minutes.

    Hoping that the problem is resolved, I will proceed with the calibration.

    As for the cause of yesterday's issue, I currently have no idea. But it could be related to the USB HID interface. Maybe the buffer was saturated or something.

    And so maybe reinitializing the peripherals was enough to resolve it.

    Best regards!

    Fathi

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