Regarding lwIP echo server in XSDK 2018.2

[Priya_mp]

Dear All,

I've used lwIP echo server example for my custom board designed with XC7Z045 with Marvell PHY.

I'm using ViVado 2018.2 and lwIP202.

I found that Ethernet link is very unstable.

Auto-negotiation is complete initially. The terminal also displays the speed initially. But its unstable.

When I'm trying to ping with the board IP : 192.168.1.10. There is 100% packet loss.

PFA for the zynq core settings.

Are there any settings to be done with lwIP Echo Server Example??. I'm using as it is.

Please guide me wrt this asap.

[JColvin]

Hi @Priya_mp,

The folks over on the Xilinx forum will be better able to answer questions on using their lwIP with a Zynq 7045 SoC than those of us here at Digilent. Otherwise, the thing I would recommend looking into is that the pins and voltage levels are correct; if PHY needs 3.3V logic but you are supplying only 1.8V logic, that won't work correctly as 1.8V does not meet the low end of the voltage high threshold.

Thanks,
JColvin