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Altera_Forum's avatar
Altera_Forum
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15 years ago

Connecting Custom Logic to M4K block?

Hi,

I have built a system which loads images from SDCARD to the onchip memory in Cyclone II in DE2-70 board using NIOS II IDE and C code ..

Now I need my custom logic modules to read the image from the memory to do some processing, how do I connect my custom logic to the SOPC instantiated M4K block and read the loaded values from it?

Should my custom verilog module be added as a component in SOPC to resolve this

Thanks

2 Replies

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

    Yes, you need to wrap your custom logic into a custom SOPC component so that you can connect it to the SOPC system.

    You'll either want to

    a) design your custom component with an Avalon-MM interfance and DMA capable

    b) design your custom component with an Avalon-ST interface and use the "sgdma" component to perform DMA

    Or maybe a third option:

    When reading the image from the SDCARD, store it directly into your custom component, instead of having a separate onchip memory component.