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ADS7057EVM-PDK: PC Interfacing Question

Broydon Stufko
Prodigy 120 points
Part Number: ADS7057EVM-PDK


Hello,

We are looking to interface with an analog acoustic emissions sensor operating in the 100kHz to 450kHz frequency range.  We believe the ADS7057EVM-PDK could be a good solution as it samples at an appropriate frequency to capture the signal, and a good enoug bit resolution.  However, we are trying to interface with an NVIDIA Jetson board running a Linux distribution.  In the User Guide, I get the impression that the provided software is only Windows-based.  Is this the case?  If so, would it be possible to bypass the software/write our own that runs on Linux?  Would this be a monumental task?

Thanks,

Broydon

  • 0
    TI__Mastermind 25030 points

    Hello

    The GUI is only intended for customers to evaluate the performance of the device.

    If you are trying to use the EVM as part of your system, then you will need to create your own code to communicate with it.

    The PHI board that comes with the EVM is the communications card and it only works with the GUI, thus you will not be able to use this to communicate with the ADC outside of the GUI.

    you will need to connect to the digital pins of the ADC and to your host (CS, SCLK, SDO), as well as provide power. Normally the EVM is powered by the PHI board, but without that you will need to power the board directly. schematic is available in the Users Guide

    I suggest using an oscilloscope probed on the digital pins to develop and debug your code. this will help to visually check that what you think your code is doing is in fact doing it (or not). this will also help confirm you are meeting timing requirements

    Also, before you start soldering in blue wires. I suggest taking scope shots of the digital lines when the EVM is connected and working with the PHI using the GUI

    This way you know what a correct command is suppose to look like.

    Regards

    Cynthia

  • 0 in reply to Cynthia
    Prodigy 120 points

    Cynthia,

    Thanks for the info, that is good to hear we will be able to interface over SPI directly.  One small question, what do you mean by blue wires?  I am unfamiliar with the term.


    Thanks again,

    Broydon

  • 0 in reply to Broydon Stufko
    TI__Mastermind 25030 points

    No problem,

    Blue wire is a term used to describe when outside connections/wires of a PCB are soldered on to make changes or connect into the board.

    so, when i say blue wire into the EVM, i mean you will need to solder on lose wires to connect the digital connections from the host to the EVM

    Regards

    Cynthia

  • 0 in reply to Cynthia
    Prodigy 120 points

    Perfect, I had a feeling that was what it meant but was not certain.


    Thanks again for the help

    Broydon