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AM3359: Internal RAM access

Satoshi_dist
Prodigy 20 points

Part Number: AM3359

Hello,

I can access OCMC RAM on AM3359 starting at address 0x40300000.
But, I can not access internal RAM on AM3359 starting at address 0x402F0400.
MMU is disabled in Internal RAM.

Are there any settings or registers that restrict access to the internal RAM on AM3359 starting from address 0x402F0400?

I read the TRM and looked for a solution but couldn't find it.
TRM is here:www.tij.co.jp/.../spruh73q.pdf

Thank you.

Satoshi

  • 0
    TI__Guru* 90705 points

    Is this on a custom board?  Are you using Code Composer or other code base?  How you you accessing the memory?

    Regards,

    James

  • 0 in reply to JJD
    Prodigy 20 points


    Thank you for your reply.

    I am using BeagleBone Rev.A5.

    I want to access the internal SRAM (0x402F0400) via AHB(AXI)-AP using JTAG debugger.

    The OCMC RAM starting at address 0x40300000 can be accessed via AHB (AXI) -AP using a JTAG debugger.

    I wanted to resolve it quickly, so I contacted TI technical support directly and was able to find out what I wanted to know.

    The internal SRAM address 0x402F0400, this address is inside the ARM Cortex-A8 core.

    To access it, I need to do it through the Cortex-A8 itself and not through DAP, since DAP connects directly to the L3 interconnect rather than the MPUSS-local interconnect and therefore cannot access it.

    Thank you.

    Satoshi