Arty7 xemacp undeclared

[zthom]

I'm having an issue following the example here:

https://reference.digilentinc.com/learn/programmable-logic/tutorials/arty-getting-started-with-microblaze-servers/start

The error is:

'xemacp' undeclared (first use in this function); did you mean 'xemac'? arty_ethernet_000_bsp line 347 C/C++ Problem

 

I tracked it down to this line:

https://github.com/Xilinx/embeddedsw/blob/0c6cd096c8f81978854c782c7aa175241fc3af20/ThirdParty/sw_services/lwip202/src/contrib/ports/xilinx/netif/xadapter.c#L347

 

It's failing because neither 'XLWIP_CONFIG_INCLUDE_GEM' nor 'XLWIP_CONFIG_INCLUDE_AXI_ETHERNET' are defined a few lines above that.

 

Is there a config option I missed?

[jpeyron]

Hi @zthom,

First i would right click on the bsp and re-generate the board support package. If that does not fix the error delete the bsp and create another bsp with the exact name. If that does not fix the error please attach a screen shot of the Vivado block design and the SDK with you error. Are you using the Arty-A7 board files? Which Arty-A7 are you using the 35T or the 100T? What version of Vivado are you using?

cheers,

Jon

[zthom]

Hello jpeyron.

I tried to re-generate bsp and created another project. I am using official Arty-A7 files from Digilentinc github, it is 100T. 

I have Vivado 2018.2

In the tutorial, they are using lwip 1.4 and I am using lwip 2.2 - SDK does not offer me the old version. I have followed exactly the tutorial, event with experiments, there is a problem with compiling lwip. Without lwip, bsp can compile.

Here is block design:

 

And errors:

[Darryl Ring]

This appears to be a known issue in 2018.2: https://www.xilinx.com/support/answers/71330.html. It appears that support for the emaclite driver got missed in a change (https://github.com/Xilinx/embeddedsw/commit/16c05f56fcb860513d34b83a1a301fa185e06316).

Their patch can't actually be applied to Xilinx/SDK/2018.2/data/embeddedsw, but the changes are small and easy to make. I've attached the file here. It should replace ThirdParty/sw_services/lwip202_v1_1/src/contrib/ports/xilinx/netif/xadapter.c. Then you can regenerate the BSP sources and it will compile.

xadapter.c

[jpeyron]

Hi @zthom,

I got the same issue in Vivado/SDK using 2018.2. I did not get these issues using Vivado/SDK 2017.4. It looks like an issue with Vivado/SDK 2018.2 as @Darryl Ring states in the above post.

thank you,

Jon

[zthom]

Thank you, it works now. It only needed to replace xadapter.c

 

 

[jpeyron]

Hi @zthom,

Glad that replacing the xadapter.c fixed the issue. Thank you for sharing what you did.

cheers,

Jon

 

 

 

[neha]

I replaced the adapter file and its work, but I am getting error in header file too
Error is same undeclared function

[jpeyron]

Hi @neha,

I would first re-generate the board support package by right clicking on the applications bsp. If that does not fix the error then delete the bsp and create another with the exact name.  Can you attach a screen shot of your block design in vivado?

thank you,

Jon

 

 

[mrpackethead]

Huge thanks for this!!  I too ran into this problem.  A small edit on the Tutorial would make a great addition for those new folks ( likely to be doing tutotrials )