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req: example codes for multicore programming on tci6486

manoj6581
Prodigy 240 points

Hi all,

I am new to multicore programming.I need to do my proj on TCI6486 using 2 cores . i want to know how to program multicores and how to initate different cores and sync them, are there any APIs to do this? how can i trigger the 2nd core when my project was on first core. are there any example codes so that i can see and learn how to program multicores,intiate multiple cores  and sync them.

 

Thanks,

Manoj

  • 0
    TI__Guru* 84110 points

    The best place to start is with the "Multicore Programming Guide" SPRAB27. You will find links to this and other related technical documents in the Product Folder for the TCI6486 under www.ti.com (search for keyword TCI6486 and click on the product folder link that is displayed, then click on Technical Documents on the Product Folder page).

  • 0 in reply to RandyP
    Prodigy 240 points

    Hi Randy,

    I have gone through the mutlicore programming guide you have specified. but i am still confused on how to trigger 2nd core from the 1st core or how to build a project since in doc it says that i need to have separate projects for each core. how to create a project so that i could use two cores and how can i sync them. can you please specify some more references or example codes for better understanding.

     

    Thanks,

    Manoj

  • 0 in reply to manoj6581
    TI__Guru* 84110 points

    Some additional material that may be helpful are the C6472 training modules at http://e2e.ti.com/media/p/45086.aspx . I have been having trouble getting more than just the Overview module to show up, so when you go to this page, if there is not a list of eight (8) training modules with descriptions, click Refresh on your browser a few times until they do. All of the modules will be helpful to you, but the two most directly related to your current question are "Programming a Multi-Core DSP" and "Startup Considerations".

    SPRAB27a, which you have already reviewed, discusses in Section 2 the major choices for Parallel Processing Modes: Master/Slave and Data Flow. You also have the choice of independent processing where the cores are ignorant of each other.

    SPRAB27a Section 7 discusses alternative methods of creating the code and data images, single image shared by multiple processors or multiple images.

    The easiest way to start multiprocessing with the TCI6486, in my opinion, is to use multiple images and parallel processing. For each core, build a separate project that builds an individual executable .out file. Each core will have its own copy of DSP/BIOS and CSL, each will have its own local L1/L2 memory although it would be good to use global addresses, each will have its own section of SL2 and DDR2 allocated in its memory map, and each will have its own peripheral resources set aside (like EDMA channels and timers). The CCS Parallel Debug Manager (PDM) will allow you to open, load, run, and debug each core independently.

    To signal between the cores, use the IPC module described in the datasheet.