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ADS7066EVM-PDK: Save the data capture automatically

Rick Pease
Prodigy 25 points
Part Number: ADS7066EVM-PDK
Other Parts Discussed in Thread: ADS7066

Tool/software:

Hello,

I am evaluating the ADS7066EVM-PDK and have the GUI software confirmed working. 

The signal I am trying to capture happens at an irregular rate which means setting the samples to capture and clicking capture in the UI doesn't capture the signal I'm trying to grab.

I would like to know how to read the capture data from the device over the serial port. I've been able to trigger the capture and configuration through putty but can't figure out how to pull the capture data.

Any advice is appreciated

Thank you.

  • 0
    TI__Expert 3500 points

    Hello Rick, 

    Unfortunately we do not have a direct solution to enable to read data capture via serial port via putty at the moment.  The way the controller is currently structured the data would not be accessible just through putty and would require some firmware changes. 

    We do also have some other devices and EVMs in this device family that have an integrated comparator that could help detecting these irregular signals. 

    ADS7038EVM

    Or if you would like to share more information on how you are using the device and the signal you are trying to measure I could try to help with that. 

    Best regards,

    Yolanda

  • 0 in reply to Yolanda Gonzalez
    Prodigy 25 points

    Hello Yolanda,

    Thank you for your reply and help with this topic.

    I am measuring a load cell and trying to see how much force is applied to the load cell when an irregular human action happens withing ~30 seconds of starting the test. I would like to be able to set this eval kit up to be ready to capture/save once CH0 has changed/ toggled.

    My current work around is to turn on auto sequency and oversampling so the capture window is now ~12 seconds which at least gets me moving but I think I am missing some of the events.

    I would love to be able to set something like "if the signal goes above this level or below this, save the next 2048 readings"


    Do you know how the data is sent to the browser-based UI? I couldn't find information about it online and had some issues trying to peek in on how it works.
    I can see there is a "capture done" style message sent over the serial port but I don't see the data related to the readings coming over.


  • +1 in reply to Rick Pease
    TI__Expert 3500 points

    Hello Rick, 

    I see what you mean, a direct and single device approach for triggering and capturing with a single ADS7066 and current PAMB controller would be a bit difficult. 

    It would be possible, but the firmware would also have to be modified to enable this. 

    Currently the PAMB controller is detectable on PC through in two ways a serial and a bulk device, one which would be accessible through putty like you have done, but accessing the bulk would require firmware access which is currently not enabled. 

    We do have other devices with comparators that would set off an alarm when detecting a change, but as a stand device for this trigger functionality it wouldn't be a direct solution either. 

    Best regards, 

    Yolanda

  • 0 in reply to Yolanda Gonzalez
    Prodigy 25 points

    Hello Yolanda,

    Oh Interesting!

    I haven't worked with Bulk Devices before and will take my interest offline while I look into this.


    My project timeline doesn't support acquiring a different device, but I will look into your recommendation for the next time.

    Thank again for your input!

    Marking this "Resolved" as in a dead-end trying to use the hardware the way I intend and need to acquire different hardware to achieve the desired behavior as you have outlined.