Re: [lwip-users] need urgent help in debugging retransmission issue

[Sergio R. Caprile]

Yes, I remember analyzing your capture file about 15 days ago and
pointing to that possibility. Glad it was a hit.

"lpc_low_level_output" is not something related to lwIP, it is your
vendor driver code. Ask your vendor.

Want to find it yourself ? Great! Then grab a debugger and place
breakpoints in the driver until you get it. You can write a small
application that just tries to send lots of data or just work on the
driver alone (without lwIP). My advice is to work on just the driver.

The output function of the driver is a piece of software that takes what
will go in the Ethernet payload (prepared by lwIP) and sends it to the
Ethernet hardware. It should be simple, unless it is DMA driven, in
which case it is a bit more complicated. Good luck, I suggest you try
asking for help in your vendor forum anyway.