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oscar717
Observer
Observer
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Registered: ‎02-26-2020

AXI 1G.2.5G Ethernet Subsystem - lwIP "Link down" issue

Hi,

I am having an aproblem to get ethernet interface over the SFP using the lwIP 211 application. Then console window currently prints "Link down" and I have no clue why is this happening.

The only think that I modify in the BSP was the link speed, I set it to 1000 Mb, other than that, I did not modify anything.

I tried to telnet to 192.168.1.10, but I get no response

I attached an image of my block diagram and and screen shot of the SDK terminal outputs.

Capture.PNGCapture2.PNGCapture3.PNGCapture4.PNG

Capture.PNG
Capture2.PNG
Capture4.PNG
Capture3.PNG
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nanz
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Registered: ‎08-25-2009

Hi @oscar717 ,

Have you tried to add debug point into the source codes and see where exactly the codes are stuck?

Also, what PHY are you using? LWIP does not support all PHYs:

https://www.xilinx.com/support/answers/63495.html

 

 

"Don't forget to reply, kudo and accept as solution."
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oscar717
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Registered: ‎02-26-2020

Hi @nanz,

I did run the the application in Debug mode in SDK and the code does not get stuck in any place.

Regarding to the PHY, I am using a FINISAR SFP (FCLF8520P2BTL), and I was reading the datasheet and I don't see any specification of what PHY is inside. They said that I can access the 1000 BASE-T Physical layer via I2C by looking at the Marvell IC 88E1111

Or do you have another approacho on how to test the Ethernet Interface without using the lwIP application?

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