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EK-TM4C1294XL: enet_lwip example not working

Bruno Fascendini
Prodigy 140 points
Part Number: EK-TM4C1294XL


Hello!

I've been developing an app during the last months. My starting point was the "enet_lwip" example. I added and modified a copy of this example to create my custom App. It all worked well, till some day the http web page stop responding. I assumed I made a mistake (I'm using "POST" methods") but problem is also present in a fresh (untouched) "enet_lwip" example. Web page example can't load, fail, it's slow, etc. All kind of weird behaviour.

Wireshark is showing errors:

I'm having "TCP Spurious Retransmissions". Any ideas where should I search to fix this error?

Examples version: TivaWare_C_Series-2.1.4.178

CCS  Version: 7.1.0.00016

ARM Compiler: 16.9.1

Thanks,

B

Thanks.

  • 0
    TI__Guru 72500 points
    I was not able to reproduce your problem using the same version of CCS and Compiler. Could you have a problem with your cable or RJ45 connector?
  • 0 in reply to Bob Crosby
    Prodigy 140 points

    Thanks for testing. I'll try with a different cable. Currently I'm using a 6 feet. Cat6 1Gbps cable. It's driving me crazy. Can't find the issue.

    B

  • 0 in reply to Bob Crosby
    Prodigy 140 points
    Tried with other cable...same thing. Tried with other router. Same thing. They started to work both (untouched enet_lwip example and my project) at some point (without changing anything but just cleaning project/rebuilding) but now they fail again. I made a video showing how I'm unboxing a brand new EK-TM4C1294XL kit with the precompiled enet_lwip example (using LM Flash Programmer Tool) to show you that it doesn't work even making things that way (untouched):

    www.youtube.com/watch

    It did work for the last months. I saw the error a couple of weaks ago during a regular testing procedure. And from there; nothing. In fact I ended up reinstalling Windows 7 x64 Ultimate from scratch, and the problem persists. Crazy thing is that error is also present even in the prebuilt "enet_lwip" example (C:\ti\TivaWare_C_Series-2.1.4.178\examples\boards\ek-tm4c1294xl\enet_lwip\ccs\Debug\enet_lwip.bin).

    I'm not really understanding what's happening here...
  • 0 in reply to Bob Crosby
    Prodigy 140 points

    Ok, so I decided to test the web page from another PC in the same router... and it works. Without any issue. I can't believe that it's the computer the one making the problem. Don't understand what could be making the PC for not being able to connect to the page. But, it seems OK from the other PC... So... ¿?