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ADS1274EVM-PDK: problem with continuous sampling

omri alcobi
Prodigy 10 points

Part Number: ADS1274EVM-PDK

I have recently bought the ads1274 evaluation board, I am using the ADCpro software with the ADS1274EVM-PDK plugin to connect to the board on a windows 10 computer .

I was able to connect to board and tried to sample some data in continuous mode at 128kSPS for 5 seconds.

The data was saved in several text files with different sizes, when opening the saved files I saw that each file had a different number of samples with a total sum of about 34000 samples in all the files combined.

can any one please help me understand what is going on here?

Also is there another software to work with to connect to the board because the ADCpro crashes frequently, and is there a python module that is able to sample the board?? 

  • 0
    TI__Mastermind 23050 points

    Hi Omri,

    How are you exporting the data from ADCPro? Continuous mode does not allow logging to a file and it doesn't actually result in continuous streaming of data. Data is always acquired in blocks, specified by the block size. Continuous mode just automatically initiates a new block after the previous has completed. There will be a discontinuity in the data, and not all of the data from your continuous stream will be available at the end. I would instead recommend setting the block size to the number of samples you want to capture per channel and then exporting from the multichannel scope view:

    This will export all of the data that is displayed by the scope. Note that if you have a large number of points the scope will appear white. The data is still there, but since it is plotted in white there is just too much data to display. You can still export all of it. If you zoom in to the plot, it will only export data displayed.

    Unfortunately we do not have another way to interface with the EVM, but I hope this helps!

    Best,

    Zak 

  • 0 in reply to Zak Kaye
    Prodigy 10 points

    Hey Zak,

    Thank you for the quick response!

    To answer your question I was exporting the data while sampling in continuous mode in Data monitor test type with the auto checkbox checked.

    So just to be clear there is no way to sample and save data for a recording of a couple of minutes? 

    And is there a chance to get the source code for the ADCpro sofware?

    Thank you,

    Omri

  • +1 in reply to omri alcobi
    TI__Mastermind 23050 points

    Hey Omri,

    There is no way to save a continuous stream of data for multiple minutes. The maximum number of samples that can be recorded at a time is 1,048,576. I don't believe we can share the source code, but I will double check!

    Best,

    Zak