lwip autonegotiation fails when using FSBL

Hi,

I have a Vivado design based on UltraZed-EV SOM. I am using Vitis 2019.2 to develop an application that makes use of a lwip TCP server. It happens that if I launch the application by selecting the psu_init.tcl file option in the Target Setup Configuration of the debugger everything works fine. If I select the initialization through the FSBL file, the lwip autonegotiation procedure always fails with the following messages:

Auto negotiation error
Phy setup error
Phy setup failure init_emacps
Ethernet link down

Needless to say that in the final application I need to use the FSBL

Any help is very much appreciated

Daniele

0 drozwood90 over 4 years ago

Hi there,

I'd have to confirm with the SW group, but as far as I know, the networking "stuff" is all initialized and re-initialized between those two steps. This means hardware, clocks, and other control loops.
That is probably the issue you are seeing. I'll pass this along to see if I can get some kind of confirmation.

--Dan
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0 narrucmot over 4 years ago

You may want to take a look at Xilinx XAPP1026 - lwIP Application Examples and XAPP1306 - PS and PL-Based Ethernet Performance with lwIP Stack. I believe the prescribed method is to use the psu_init.tcl to init the Zynq PS when launching the lwIP app, etc. via the Xilinx SDK, and use the FSBL when booting the lwIP apps via SD card.

--Tom
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0 dat63 over 4 years ago in reply to narrucmot

Hi Tom,
what you suggest is exactly what I am doing; I am using the lwIP TCP server demo application (no custom code) and it simply does not work when I use the FSBL either from the debugger or booting from the SD card
Daniele
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0 enelson_ngrf over 3 years ago in reply to dat63

Hello Daniele,

Did you resolve this? I am having the exact same problem.

Thanks!
Elliott
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