How to implement and use a LWIP in PPC440

Posted on 2010-08-19
Last Modified: 2012-05-10

I would like to know how to implement a LWIP stack in a PPC on a virtex5 FX.
Actually i found a lot of doc on Internet but it's alway too complex for me. I would like to have an input/output to my vhdl design to communicate with a computer via this LWIP.
The easiest example i found was the "echo server", but from that i don't know how to link the receive and send data to my vhdl design.

If someone can give me a good tutorial or example (other than web server) it would be very nice.

Thank you

Question by:DBTechnique
  • 3
  • 3
LVL 12

Expert Comment

ID: 33482634
Lwip should be installed on the host operating system. Are you using NIOS? maybe in the documentation page there are some hint or instruction.
When the stack is implemented with the O.S., you can use it as a normal TCPIP stack (with sockets and other stuff)

Author Comment

ID: 33482881
Ok, maybe my explanation was not so good, so i explain again my problem.

I'm working on the Firmware side of a project (on Xilinx Virtex5 FX). What i have to do is to build a TCP/IP connection, like that we can exchange data from the computer (with a independent SW) and the hardware (using the FW on the FPGA).

What i'm using to do that is a PowerPC440 that is resource of the Virtex5. And i would like to implement a soft-Mac-Ethernet IP to do the job.
The library that is usually (of course there are other) is called lwIP. I found some exemple on the net that use this library to make an embedded sw, but there are too simple or too complex.

So i would like to know if some could explain me how to do that or give me some link on tutorial or example.

Thank you

Author Comment

ID: 33527182
nobody ??
Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

LVL 12

Expert Comment

ID: 33529281
I never used lwip, but as far as I can see from the website, it can be used with or without an operating system.


If I understood correctly, your situation is to have the stack running without an operating system, on a "single threaded application". It's described on the first part of that page.
(sidenote: there is a possibly subtle bug in that code, the check for time elapsed for call to tcp_tmr() should be ">=" instead of "==", because missing one call will lockout all the future time elapsing...)

I would start from that "single loop" application and implement an "echo server", for example. Then if you application is not too complex, I would work starting from that echo server, implementing all required functionality.

if your application is complex, I would think about installing an operating system (such NIOS or linux?)

Hope that helps, sorry for I cannot be more precise.
LVL 12

Accepted Solution

HappyCactus earned 500 total points
ID: 33529307
Looking around I found that lwip seems to be an outdated project (latest "news" dates 2003). uIP[1] seems to be the evolution of that project, it was ported to many platform (see [2]). If you are not tied to a specific soft processor and architecture, I suggest you to see the ports page and see if you can change cpu/ ethernet controller and have the uIP already ported.


Author Comment

ID: 33634187
thank you

Featured Post

VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Display adapter WDDM 1.0 3 1,199
WD Red WD20EFRX in dell R710 raid 3 942
Should I replace CPU fan/cooler to smaller size in order to access dual channel ram? 11 362
Intel vPro 4 116
When we purchase storage, we typically are advertised storage of 500GB, 1TB, 2TB and so on. However, when you actually install it into your computer, your 500GB HDD will actually show up as 465GB. Why? It has to do with the way people and computers…
SEO can be a real minefield to navigate, but there are three simple ways to up your SEO game just be re-assessing your content output.
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question