I am trying to run the lwIP echo server application project template from the Xilinx SDK on my PYNQ board. I have followed this tutorial for the. contrib/ports/xilinx – Contains the interface specific implementation || lwip 2 – Contains the stack implementation; lwip_echo_server is an application. Lightweight IP (lwIP) is an open source TCP/IP networking stack for Xilinx® Software Development Kit (SDK) provides lwIP software.
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In this part of the tutorial we will generate lwiip bitstream, export the hardware description to the SDK and then test the echo server application on our hardware. Firstly, for those of you who did not follow the first part of this tutorialwe will use the scripts in the Git repository for this project to regenerate the Vivado project.
If you followed the first part of the tutorial correctly, you should not need to xiinx this step. If you did not follow the first part of this tutorialyou may want to open the block diagram and get familiar with the design before continuing. Once the bitstream is generated, the following window will appear.
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When the ldip has been generated, we can export it and the hardware description to the Software Development Kit SDK. In the SDK we will be able to generate the echo server example design and run it on our hardware. At this point, the SDK loads and a hardware platform specification will be created for your design.
At this point, your SDK workspace should contain only the hardware description and no applications:.
Running a lwIP Echo Server on a Multi-port Ethernet design
The next page allows you to create the new application based on a template. The echo server template application will be setup to run on the first AXI Ethernet Subsystem block in our design.
We want xillnx add some code to the application to allow us to select a different port if we choose. The BSP for this project will also have to be modified slightly. There are laip few reasons for these modifications, but we would be going off-track to discuss those reasons in detail at this point. If you are using Vivado You will find the modified library files inside the EmbeddedSw directory of the repo.
I strongly recommend that you perform these modifications to the sources in the Xilnx installation files — not the sources in the BSP of your SDK workspace. These modifications are specific to using the echo server application on the Ethernet FMC.
Follow these instructions to ensure that your setup is correct:.
To be able to read the output of the echo server application, we need to use a terminal program such as Putty. Use the following settings:.
With the terminal program open, we can now load our ZedBoard with the bitstream and then run the echo server application. Now that the application is running successfully, we can test the echo server by sending packets from our PC to the Leip and looking at what gets sent back.
All Ethernet devices are required to respond to ping requests, so this is a very simple and easy test to perform using your computer.
To test that the xilixn server is actually doing its job and echoing received packets, you will have to install software that allows you to send and receive arbitrary packets.
The software that I use is called Packet Sender and can be downloaded here. Once xillinx software is installed, follow the instructions below to send and receive packets:. If you want to experiment, you can play around with the software by sending more packets, or different kinds of packets. Zynq GEM, Ethernet lite, etc. The application will lwiip compile if the correct BSP settings have not been set. To change BSP settings: Below are the links to the source code Git repositories.
Solved: Cannot connect to lwIP echo server on Zynq – Community Forums
There is a version of the project for the ZedBoard and the MicroZed. If you enjoyed this tutorial or if you run into problems using it, please leave me a comment below.
Do you think it is possible to apply this lwil to do video over ethernet VOE applications. Say, getting images from camera modules connected via ethernet and image processing is done in the FPGA? Have you tried 2 lwip echo server project in dual core. Do you have xilonx example designs or know-how for driving multiple ethernet ports simultanously with lwIP? Is there a specific reason for choosing only one ethernet MAC, deos lwIP support multiport application?
Your email address will not be published. Notify me of follow-up comments by email. Notify me of new posts by email. Noriel Christopher Tiglao on February 26, at Sukanya K on August 24, at Soumya on September 19, at 4: Mustafa Karadayi on July 18, at xllinx The IP application in the second….
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