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SPI OMAP-L138

Boris Ruvinsky
Expert 1410 points
Other Parts Discussed in Thread: OMAP-L138, OMAPL138

Dear E2E:

Thank you for your help.

I need to use SPI interface on OMAP-L138.

As I understood –SPI requires continuously transmit the data in order to receive the data from Slave. Is it correct?

If Master stops transmitting the data- the CLK is not generating and no receive data coming from Slave. Is it correct?

Thank you,

Boris Ruvinsky

  • 0
    TI__Guru** 116170 points

    Boris,

    Here are responses to your questions

    As I understood –SPI requires continuously transmit the data in order to receive the data from Slave. Is it correct?

    Yes essentially once the Master is initialized the clock is generated continuous. However data communication between master and slave depends on the enable and the chip select pins depending on which mode you are operating in. All the scenerios and modes are explained in detail in the Technical reference guide of OMAPL138 that can be found here

      http://www.ti.com/product/omap-l138#doctype6

    If Master stops transmitting the data- the CLK is not generating and no receive data coming from Slave. Is it correct?

    That is correct. Clock is generally turned off only after the entire master slave communication is complete. You can take a look at the BIOS and linux PSP for examples on SPI.


    Regards,

    Rahul