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RHark's avatar
RHark
Icon for New Contributor rankNew Contributor
5 years ago
Solved

Triple-Speed Ethernet with Max10 Issue

I'm implementing the triple speed ethernet IP (MAC, with a DP83867 as the PHY) and it's mostly working, but I've run into an issue on the TX side. When I transmit out a packet (any packet, type does...
  • RHark's avatar
    RHark
    5 years ago

    I calculated and inserted the CRC myself, but I also tried letting the MAC do it automatically. Both times the final byte was corrupted.

    I was able to get it working though, it appears as though the MAC IP was causing a much larger delay in the TXD to GTX_CLK path than I had thought. I inverted the GTX_CLK signal into the MAC and then was able to adjust the line delays on my PHY in order to get the signals to line up properly.

SengKok_L_Intel's avatar
SengKok_L_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

Hi,


Did you provide the CRC from the application? I would suggest you check if the ethernet basic frame format is correct (e.g length/type and Payload data). Perhaps you can perform a MAC loopback test, and ensure your design timing is clean.


Regards -SK


RHark's avatar
RHark
Icon for New Contributor rankNew Contributor
5 years ago

I calculated and inserted the CRC myself, but I also tried letting the MAC do it automatically. Both times the final byte was corrupted.

I was able to get it working though, it appears as though the MAC IP was causing a much larger delay in the TXD to GTX_CLK path than I had thought. I inverted the GTX_CLK signal into the MAC and then was able to adjust the line delays on my PHY in order to get the signals to line up properly.