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Altera_Forum's avatar
Altera_Forum
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16 years ago

Why I can't see SRAM when selecting reset&exception memory location?

My board has a SRAM on it. So I tried to use it in NIOS II.

From ftp://ftp.altera.com/up/pub/university_program_ip_cores/90 , I got a SRAM_Controller code to interface the SRAM to Avalon bus. However, when I try to put my code to SRAM by setting reset&exception memory location, I can not find this memory in the drop-down list. On-chip SRAM and CFI FLASH can be displayed in the drop-down list.

Can anyone help to explain how I can put my software code to the SRAM directly? Thanks.

4 Replies

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

    Did you remember to give the nios's instruction port access to the SRAM?

    (you'll need data port acces as well ....)
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    If above does not help, make sure that in the .tcl-file of the component there is following line:

    set_interface_property avalon_slave_xxx isMemoryDevice true
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    --- Quote Start ---

    Did you remember to give the nios's instruction port access to the SRAM?

    (you'll need data port acces as well ....)

    --- Quote End ---

    Thanks. Both instruction & data port are connected, but the problem still exits.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    --- Quote Start ---

    If above does not help, make sure that in the .tcl-file of the component there is following line:

    set_interface_property avalon_slave_xxx isMemoryDevice true

    --- Quote End ---

    Thanks. This method works. Now I can run download software to SRAM and run it.