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GPS connectivity on TMDX320TCI6614

SURESH A
Prodigy 50 points

How can one verify GPS connectivity/sync on this EVM from Linux?

  • 0
    TI__Guru* 81335 points

    Welcome to the TI E2E forum. I hope you will find many good answers here and in the TI.com documents and in the TI Wiki Pages (for processor issues). Be sure to search those for helpful information and to browse for the questions others may have asked on similar topics (e2e.ti.com). Please read all the links below my signature.

    We will get back to you on the above query shortly. Thank you for your patience.

  • 0 in reply to Raja
    Prodigy 50 points
    Is there an answer to my question? Please do let me know

    -Suresh
  • 0 in reply to SURESH A
    TI__Mastermind 21025 points

    Hi Suresh,

    There is no GPS module on the TCI6614 device, and to my knowledge, not on the EVM either.  Perhaps there is a way to obtain GPS information from the network, but this would not be specific to the device, and probably more relevant in a Linux forum.

      -dave

  • 0 in reply to db_woodall
    TI__Expert 5805 points
    Hi Suresh,,

    There actually is a GPS module on the TCI6614 EVM (not embedded in the SoC) -> www.ti.com/.../cc4000-tc6000gn

    The GPS module is connected to Timer0 pin. A system timer (i.e. Timer64) module should be then used to implement the SW DPLL.

    However, there is no available SW demo for setting up this module. I don't believe there is any GPS sync demo either at Linux that would showcase the DPLL state machine and the OCXO adjustments needed to sync the local clock to the GPS clock.

    There is a KS2 1588 ordinary clock demo that can be used as a guide on how to implement a SW DPLL, but it will have to be ported to use Timer64 instead of CPTS. Furthermore, the GPS SW stack on top, plus the GPS module code would have to developed by the end user.

    Kind regards,
    Javier
  • 0 in reply to Javier Malave-Bonet
    TI__Expert 5805 points
    Hi Suresh,

    Let me correct myself. There is a KS1 1588 demo that uses PA for timestamping and not CPTS. The demo missing is for KS2 actually.

    And there might be a KS1 GPS demo, but not sure the state of it. Last I was communicated is that there was no support for the EVM GPS module, so my understanding was that there is no demo. But, I may be wrong. I will double check with the SW development team and update this thread once I hear back from them.

    Regards,
    Javier
  • 0 in reply to Javier Malave-Bonet
    Prodigy 50 points
    Hi Javier,
    Do u have any update...?

    Regards,
    Suresh A
  • 0 in reply to db_woodall
    TI__Expert 5805 points
    Hi Suresh,

    After much internal research I found out that we had indeed tested the GPS solution on the 6614 EVM, but it was not meant to be packaged as a public demo. So there is no available demo at the moment, although we have tested the solution works.

    Kind regards,
    Javier