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TRF372017EVM: SPI read data is always zero at the TRF3720 gui

Thomas Young
Prodigy 10 points
Part Number: TRF372017EVM

Hi Support Team:

I used the TRF3720 GUI to program the TRF372017EVM, but I always read back zero from any of the programmed register.

I scoped the RDBK pin during at the read phase of the spi cycle, it is always zero.

Is the spi read back working at all?

Thomas

  • 0
    TI__Expert 4880 points
    Hey Thomas,

    I am going to run a few experiments tomorrow and get back to you as soon as possible.

    Yusuf
  • 0 in reply to Yusuf%20Agoro
    TI__Expert 4880 points
    Hey Thomas,

    So the GUI is programmed to enable readback automatically anytime you press read all registers or anytime you change a register value depending on the register read setting you've chosen. I was able to replicate the RDBK error you are experiencing when powering the board with a single 5V supply and keeping the JP6 jumper in tact.

    How are you powering the board? If using a single 5V supply make sure to remove JP6. If you're not using a single voltage supply, make sure you are providing 3.3V to TP2 & 5V to TP5 and that JP6 is in tact.

    Also make sure you are following the user guide when referencing how to operate the GUI & EVM.

    www.ti.com/.../slwu068a.pdf

    Yusuf