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Altera_Forum's avatar
Altera_Forum
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10 years ago

Disabling SGDMA in NicheStack project

I created a TSE Project, I'm running 10/100Mb Small MAC with the MII interface. I removed the SGDMA from the example project I had.

1) In the "Triple-Speed Ethernet MegaCore Function" User guide for the small MAC interface it does not show an SGDMA interface, I assume that you don't need it, is this so?

2) Can I disable SGDMA in the NicheStack library?

3) How would I do that?

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    10 years ago

    SGDMA is how the Ethernet frames move between memory (SDRAM, DDR, etc.) and the TSE. If you remove it, the NicheStack library would be unable to communicate with the network (it would be able to control the TSE registers, but unable to send/receive actual Ethernet frames).

  • Altera_Forum's avatar
    Altera_Forum
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    10 years ago

    I see your point, Figure 11-1 in the "Triple-Speed Ethernet MegaCore Function User Guide" shows this clearly. Sorry, I should have noticed that on the first pass.