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Oliver_I_Sedlacek's avatar
Oliver_I_Sedlacek
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2 years ago

NIOS2 doesn't automatically run from external RAM, how to debug

I really need my NIOS2 to autostart and run from off chip RAM using the bootloader copy method. The trouble is that despite many readings of the handbook and multiple rebuilds of the design the code ...
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tehjingy_Altera's avatar
tehjingy_Altera
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2 years ago

Hi Oliver


Could you share what issue that you are facing currently?

Have you managed to see the user guide on the boot copier?


https://www.intel.com/content/www/us/en/docs/programmable/683820/current/nios-ii-processor-boot-copier.html


I would check a few points.

  1. The setting in the EMIF controller, whether it is according to the board RAM.
  2. In the NiosII the vectors are selected to point to the EMIF.
  3. In the BSP linker have you selected correctly.


Regards

Jingyang, Teh



  • Oliver_I_Sedlacek's avatar
    Oliver_I_Sedlacek
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    2 years ago

    Jingyang, yes I've used that guide for the boot copier.

    1. The EMIF must be correct because the external RAM works fine. When the debugger runs the code everything works.

    2. This is the most suspect area. I've read the documentation and my question is "how do I check that the vectors are correct?". What does 'correct' look like?

    3. Same as point 2, what does 'correct' look like? I think the linker memory areas must be correct, see point 1.

    Oliver

    • Oliver_I_Sedlacek's avatar
      Oliver_I_Sedlacek
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      2 years ago

      Keeping this alive, I really need a solution.

  • Oliver_I_Sedlacek's avatar
    Oliver_I_Sedlacek
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    2 years ago

    Any news. I know that if there's no activity then this will get closed even if I haven't got an answer.

    Oliver