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TMS320F28335: SPI Communication and chip select pin

Prakash S
Prodigy 150 points
Part Number: TMS320F28335

Hello to all,

Actually now I am working on SPI communication using TMS320F28335 controllers.

I want to send data from one master to multiple slaves and correspondingly from slaves to master.

Here I need to send data individually to each slave and similarly, the individual slave also sends data to the master.

As I made a google search regarding this concept, I got to know that it required individual chip select pin for the individual slave.

The SPI peripheral pin in TMS320F28335 consist of only one chip select pin(SPISTE),  can I use GPIO pin as a chip select for individual master slave communication.

If I can configure GPIO pin as a chip select means, How I can configure it as a chip select.

If any other possibilities are there means kindly let me know the options.

Thanks and Regards

  • 0
    Guru 30330 points
    Prakash,

    See this thread for the hardware connection: e2e.ti.com/.../591822

    For the F28335, The Master, you would configure multiple GPIOs to be wired to the Slave chip select signals. You will then need to control them in software. This is necessary because only your software knows which slave is being addressed, so the software needs to handle the chip selects individually.

    Thanks,
    Mark