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F2837x controlCARD

Philipp
Prodigy 170 points

Hello,

i wanted to use the GPIOs 122 to 137 of the F2837x controlCARD. But as i see now, the controlCARD seems not to be usefull to me. The named GPIOs are not connected to anything, am i right? Is there a way to connect anythink to this IOs?

  • 0
    TI__Genius 15260 points

    Hi Phillipp,

    I'm not familiar with the controlCARD, but if you truly cannot access the these pins directly and want to verify their functionality for their development, you can reroute these to a different GPIO through a round-a-bout method.  I'll ask someone to verify this.

    You can use the INPUT X-BAR and assign an INPUTx to each of the GPIOs you wish to verify but cannot access.  So for example, INPUT1 = 122, INPUT2 = 137, etc.  You can then route these connections to a different GPIO through the OUTPUT X-BAR by selecting the corresponding INPUT X-BAR signal as the source.  So if you go to the datasheet and locate a OUTPUTXBARx signal which you have access to on a different GPIO, you are essentially creating a loop which will re-route the output of your GPIOs to a different one.  There will of course be some extra propagation delay and such, but for just viewing the output this should work well.

    Kris

  • 0 in reply to Kris Parrent
    Prodigy 170 points

    Hi Kris,

    i will look into the datasheet for this feature tomorrow. Thank you for answering my question.

    edit:

    I looked into the Datasheet. It says it is possible to mux the needed functions (sigma delta filter module) to many GPIOs.
    But the Pin Mux Tool in Versino 3.0.396 says:
    The F2837x-PTP_176 has no sigma delta, but only the sd clock.
    The F2837x-ZWT_337 has sigma delta filters. But they can only be muxed to other sigma delta pins.

    I believe the Datasheet is right and the Software is incorrect, but i cant verify that now.
    Can you say if there is a newer Version of the Pin Mux tool than in the wiki linked?

    http://processors.wiki.ti.com/index.php/TI_PinMux_Tool