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Original question:

PGA411Q1EVM: PGA411Q1EVM

CCS/PGA411Q1EVM: PGA411Q1EVM

JEMIN P JAMES
Prodigy 110 points

Part Number: PGA411Q1EVM

Tool/software: Code Composer Studio

Hi,

I am trying to communicate with PGA411Q1EVM and ti TMS570LS3137DZWT Hercules board through SPI.

But after power on some unknown values are coming in SOMI of the PGA411Q1EVM.

And it is not able to capture through mipspi () function.

Is there any example codes are there in the CCS v6.0.1 to drive the PGA411Q1EVM through TMS570LS3137DZWT Hercules board.

Thanks

  • 0
    TI__Mastermind 23810 points

    We do not have any sample code for that specific MCU. We do have sample code for the TMS320F28069M available with the PGA411-Q1 TI designs:

  • 0 in reply to Clancy Soehren
    Prodigy 110 points

    Hi,

    Can we get the initialization and reading angle SPI commands for PGA411Q1EVM?

    Thanks

  • 0 in reply to JEMIN P JAMES
    TI__Mastermind 23810 points

    Jemin,

    The EVM source code we cannot provide. The firmware examples from the TI designs are more useful anyways.

  • 0 in reply to Clancy Soehren
    Prodigy 110 points

    Hi Clancy,

    We have connected the PGA411Q1EVM board through USB to our pc where the PGA411-Q1 GUI s/w is installed . We are able to communicate with the PGA411-Q1 through PGA411-Q1 GUI s/w and we are getting the accurate angle reading from the PGA411-Q1 on PGA411-Q1 GUI. We connected SPI pins of J11 jumper and saw the SOMI(SDO) of the value.

    But whenever we disconnected the USB, the data available in the SPI has lost.

    Is there any way to get data through SOMI(SDO) PGA411-Q1, without the use of USB connection/PGA411-Q1 GUI?

    Thanks

  • 0 in reply to JEMIN P JAMES
    TI__Mastermind 23810 points

    You may need to do some board modifications to do this. There is some back-feeding from the PGA411 to the MSP430 portion of the board when the USB power is disconnected. This means that the level translators may not be in a truly High-Z state, which could interfere with your external SPI connection.

    Try powering the VBUS test point with 5V to supply power to the MCU portion of the board (or you can plug in the USB cable). Then force the LSHIFT_NEN net (accessible by connecting a wire to R44) to 3.3V. This should keep the level translators in a High-Z state, which will let you jumper in your own SPI connections.