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Altera_Forum's avatar
Altera_Forum
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15 years ago

SSRAM verify error

Good afternoon,

I have a problem with a property own board. I use the same SSRAM and conection than NIOS II cyclone II board, then it must be going, but the problem is that when I try to download to the SSRAM, NIOS IDE gets an error:

"Verifying 00200000 ( 0%)

Verify failed between address 0x200000 and 0x201DAB

Leaving target processor paused".

I have checked the SSRAM with IORD and IOWR functions, and it works correct.

Now I'm triying to check the SSRAM after the NIOS IDE download the program:

- I put the SSRAM as Program Memory, roData,...

- I save the .elf generated.

- Run debuger (it writes all the .elf data to the SSRAM and verify it, with the error).

-Change the program memory, roData... to OnChipMemory.

- Run debuger, and then, before anything, I open a memory window and check the content of the SSRAM with the data of the .elf generated in the first step.

The problem is that the elf file has a header, and I suppose that something more in the middle. I have check part of the .elf with SSRAM content and all is correct, but I don't know if there is something that must be in the SSRAM that isn't.

Some one know the construction of the .elf file?

Thank you for your support,

Isaac Campos

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    'objdump -p' will give the list of the data areas (as used by the program loader) within the elf image, together with their addresses, sizes and offsets into the elf file itself.

    That should be enough.

    The actual structures to get the program headers are relatively easy - they are designed for small loaders to use, and are defined in elf.h.

    Since the elf definition is largely architecture independant you can get that file from anywhere.