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TMS320F28377D: How to read RAM and Flash on CPU2?

Daniel Fang
Genius 11600 points
Part Number: TMS320F28377D

Hi

CPU initiate EMIF2 to extend 2 pcs RAM and 1 Flash. It's working well to read and write on CPU1. 

How to read and write RAM and Flash on CPU2?

Is there any document or example code about this?

Thanks. 

 

  • 0
    TI__Guru** 115271 points

    Hi Daniel,

    EMIF2 is only accessible from CPU1 and it's CLA. EMIF1 has access from CPU1 as well as CPU2. And the way you access it is same as you are doing CPU1 access to EMIF2 (using EMIF1 address space). You need to change the value of MSEL_EMIF1 bit to '1' in EMIF1MSEL to give the EMIF1 ownership to CPU2. This configuration need to be done from CPU1 code. We do not have example code for this.

    Regards,

    Vivek Singh

  • 0 in reply to Vivek Singh
    TI__Genius 11600 points

    Hi Vivek,

    Change to EMIF1 now, but still not working.

    Could you help review below code? Thanks a lot.

    CPU1 set Emif1ConfigRegs.EMIF1MSEL.all = 0x93A5CE72; to select CPU2

  • 0 in reply to Daniel Fang
    TI__Guru** 115271 points

    Hi,

    As mentioned in section "EMIF1_CONFIG_REGS Registers" EMIF1MSEL is EALLOW protected register (all registers in EMIF1_CONFIG_REGS are EALLOW protected) so you need to use EALLOW before writing to it.  Please correct the same and see if it works.

    Regards,

    Vivek Singh