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sharing of EMIF peripheral by ARM & DSP

Kalaiyarasan ES
Intellectual 680 points

Hi,

    For my application, I want to access EMIF NAND flash from both ARM and DSP mutual exclusively .Pl let me know the procedures for sharing the peripherals and also let me know any constraints in accessing in this manner

I am using Linux in ARM and DSPBIOS 5.41 in DSP.    

Regards

Kalaiyarasan

  • 0
    TI__Guru*** 125430 points

    You need a mutex that spans cores.  I believe the "Multi Processor Critical Section" (MPCS) from dsplink serves this purpose.  Once one core starts accessing the NAND flash the other core needs to wait until it's finished or else it will mess up the ECCs, etc.  The MPCS will handle that.