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SPI: MASTER AND SLAVE SHOULD COMMUNICATE USING SAME CODE

naga iec
Prodigy 40 points


HI ALL

I try to implement same code in master and slave for spi communication. Is it possible to do so? In detail, master will have code for both master_init and slave_init. The exact replica will be in slave controller. Which ever turns on first, it needs to configured as master and the other one as slave. This is my requirement. Innovative ideas, suggestions, h/w suggestions are requested on this concept

  • 0
    Guru 192875 points

    Hi Naga,

    Which controller are you using? Basically SPI peripheral has a register SPICTL in which you can configure the device as Master/Slave.

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Prodigy 40 points

    I am using F28021. configuration is fine. But i am looking for logic : i need same code for master and slave. whichever turns on first iit should configure as master and the later one as slave.

  • 0 in reply to naga iec
    Guru 192875 points

    naga iec said:
    But i am looking for logic : i need same code for master and slave. whichever turns on first iit should configure as master and the later one as slave.

    There's no ready made code or provision as such but you can write an algorithm to do so. What you can do is, use SCI to determine the master/slave (using first power ON logic) and then configure SPI accordingly.

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Prodigy 40 points

    Thank U Gautham.

    The idea what u gave is good. I will try on this logic. But a small correction here. I havent asked readymade code on this. i requested some ideas on this.

    Thank you for your valuable inputs.

  • 0 in reply to naga iec
    Guru 192875 points

    naga iec said:
    The idea what u gave is good.

    Thanks!

    naga iec said:
    I will try on this logic.

    Sure, do keep us informed.

    naga iec said:
    But a small correction here. I havent asked readymade code on this. i requested some ideas on this.

    No problem, I misunderstood when you asked for "i need same code for master and slave".

    Regards,

    Gautam