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Altera_Forum's avatar
Altera_Forum
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16 years ago

nios debug downloading problem

hey guys...

i'm having a problem with downloading program to the FPGA. i use sram to store the instruction. i dont get any errors while building the project. but when i tried to debug the program, it keeps giving me error message like this:

" Downloading 01080000 ( 0%)

Downloaded 36KB in 0.6s (60.0KB/s)

Verifying 01080000 ( 0%)

Verify failed between address 0x1080000 and 0x1088D27

Leaving target processor paused "

what's the problem??

address 0x1080000 seems to be the base address of the sram. i attach my connection in sopc too. thanks for the help

2 Replies

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

    I presume this a physical sram device located outside the fpga, not fpga ram.

    In this case verify if you are missing some connection between sopc pins and fpga pins. Also verify the correct assignment of these pins.

    Last, verify your system complies with sram access time.

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

    thanks cris

    the problem's solved. somehow i forgot to update the block after i substituted on-chip memory core with sdram controller core.