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Altera_Forum's avatar
Altera_Forum
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16 years ago

Add instructions in the processor NIOS

Hi everybody!!

I wonder if anyone knows how to put instructions in the processor NIOS...These instructions are created by me.

I tried to follow the manual but is not working. I also tried to create a new component to be added to the tab of the custom instructions NIOS II processor but my component did not appear on this tab.

I'm from Brazil, so my English is not very good, if not understand anything I speak I try to explain again.

Thanks you!

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    It´s hard to see what´s wrong. Now we can only guess. Can you post your VHDL/Verilog Code. That would help. The first thing I thought what could be wrong was there is something wrong with your Avalon bus.

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    mki, thanks for your reply.

    The problem is not the vhdl code. It is the time to put the code as instruction NIOS processor. How do I put this code vhdl I did as the instruction NIOS?

    I only know I have to do that in SOPC, but do not know how...

    Thanks you!
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    do you mean custom instructions ?

    open your project with the sopc builder

    have a look at menue -> tools -> options

    change to the IP search path

    make shure there is a path listed that contains your custom ip

    custom ips will not be visible where normals ips are in your component library on the left side

    instead double clic on your nios core

    go to last tab Custom Instructions

    your custom ip will be available on the left side, highlight it and add it

    now you should see it on the right side with its opcode extension

    close the nios core window

    regenerate the sopc

    recompile your fpga

    now your design has the custom ip functionality

    if you use the ide, just recompile your application at it should now know your custom ip