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alexforencich / verilog-ethernet

Verilog Ethernet components for FPGA implementation
MIT License
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question about principle #72

Open AliceXuXu opened 3 years ago

AliceXuXu commented 3 years ago

Is KC705 full duplex? Because the light of the duplex of my development board is on

AliceXuXu commented 3 years ago

please help me ,if someone know it.thank you

alexforencich commented 3 years ago

The PHY on that board is wired up exactly the same as on several other boards; it should come up as full duplex if the link partner supports full duplex. The verilog-ethernet example design does not touch any of the PHY registers, and the default for autonegotiation should be to request full duplex. I'll dig out my KC705 later and see if the duplex light is on or not just to confirm that it's working correctly.

AliceXuXu commented 3 years ago

Thanks for your reply.here I would show you two pictures.the first is Xilinx offical document:url:https://www.xilinx.com/support/documentation/boards_and_kits/kc705/ug810_KC705_Eval_Bd.pdf the second is the result of my experiment image

AliceXuXu commented 3 years ago

微信图片_20210405143742(1)

AliceXuXu commented 3 years ago

The PHY on that board is wired up exactly the same as on several other boards; it should come up as full duplex if the link partner supports full duplex. The verilog-ethernet example design does not touch any of the PHY registers, and the default for autonegotiation should be to request full duplex. I'll dig out my KC705 later and see if the duplex light is on or not just to confirm that it's working correctly.

Have you install bitstream in you KC705 board？，If you reply to me, it will be a great honor

alexforencich commented 3 years ago

Finally got around to testing this. Looks like the light is simply inverted from what the documentation states. I connected my KC705 to a gigabit USB NIC. ethtool reported that the link came up as 1000 Mbps, full duplex. The lights 1000 and DUP were illuminated on the card, exactly like your picture. Then I used ethtool to set the speed to 100 Mbps, and the lights changed to 100 and DUP. Then I used ethtool to set the duplex to half, and the DUP light went out, leaving only the 100 light illuminated.

AliceXuXu commented 3 years ago

OK, thank you very much. That means the official document is wrong. Thank you very much again. I was wondering if you could offer some suggestions on encapsulating UDP frames. After all, this project is just testing the Ethernet function. Do you have any ideas for practical applications?