Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

LWIP/LAN91C111 Bug!

I've just spent the best part of a day trying to get some simple socket stuff to work under LWIP/uCos. Symptoms? Telnet-style connections locked up and dropped mysteriously... Anyway, ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

I don't have any accurate figures, but my NIOS dev kit board is serving web pages at about 150KBytes/second. Not great, but I've done no optimization yet.

If your receive is slow, try increasing the MAX WINDOW SIZE option in the LWIP TCP options page. It defaults to 2K, which means almost every packet will need an immediate ACK. Ethereal is a great tool for seeing what's really happening on your link.

- Roddy