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snehal_p's avatar
snehal_p
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2 years ago
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Ethernet GMII to RMII converter ip

Hello,
Ethernet RMII Interface on the cyclone V board is connected through FPGA IO, to use one of the HPS EMACs we need GMII to RMII converter ip.
Can anyone help with the Ethernet IP to convert GMII to RMII.
Thanks,
snehal_p
  • ZiYing_Intel's avatar
    ZiYing_Intel
    2 years ago

    Hi snehal_p,


    Although the HPS EMAC supports RGMII(dedicated hps part pin), you can try route the EMAC to the FPGA in order to re-use the HPS I/O for other peripherals. When the EMAC is routed into the FPGA it is exposed as a MII/GMII interface. So when the EMAC is routed into FPGA, it support GMII interface.


    Best regards,

    Zi Ying


8 Replies

  • ZiYing_Intel's avatar
    ZiYing_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi snehal_p,


    Although the HPS EMAC supports RGMII(dedicated hps part pin), you can try route the EMAC to the FPGA in order to re-use the HPS I/O for other peripherals. When the EMAC is routed into the FPGA it is exposed as a MII/GMII interface. So when the EMAC is routed into FPGA, it support GMII interface.


    Best regards,

    Zi Ying


    • snehal_p's avatar
      snehal_p
      Icon for Contributor rankContributor
      2 years ago

      Hello Zi Ying,

      Thanks for the response.

      On cyclone V board we have Ethernet RMII interface through FPGA IO.

      As when the EMAC is routed into the FPGA it is exposed as a MII/GMII interface. So when the EMAC is routed into FPGA, it support GMII interface. Can you suggest GMII to RMII converter ip.

      Thanks,

      snehal_p

  • ZiYing_Intel's avatar
    ZiYing_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi,


    Just wonder that are you plan to use RGMII with Triple Speed Ethernet IP?


    Best regards,

    Zi Ying


    • snehal_p's avatar
      snehal_p
      Icon for Contributor rankContributor
      2 years ago

      Hi,

      With triple speed ethernet ip can I use RMII.

      Thanks,

      snehal_p

      • FvM's avatar
        FvM
        Icon for Super Contributor rankSuper Contributor
        2 years ago
        Obviously RMII is restricted to 10/100 Mbps. I presume that's what you want.
  • ZiYing_Intel's avatar
    ZiYing_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi snehal_p,

    You may try with the HPS GMII to RGMII Converter IP.

    The IP is removed on all Quartus Pro version 17.1 onward but you can use the IP in Quartus standard version because the Standard version is to be used by Cyclone V and supported devices.

    Best regards,

    Zi Ying


  • ZiYing_Intel's avatar
    ZiYing_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi snehal_p,


    Do you still have any question about this case?

    Else I would like to have your permission to close the case.


    Best regards,

    Zi Ying


  • ZiYing_Intel's avatar
    ZiYing_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi,


    Since I no hear any feedback from you, I am now close the case.

    If you have another question after the case closed, please do feel free to submit another issue.


    Best regards,

    Zi Ying