I'm using lwIP on a Stellaris micro, and saw lots of dropped packets. Upon
further investigation, it turns out these packets were failing TCP checksum. I
noticed that if I enabled debugging in the correct areas, and enough of it, the
issue went away. Long story short, after lots of trial and error I discovered
that if I disable debugging and add a delay of 300us at the very end, before
the return, in ip_output_if(), it fixes the problem. If I decrease the delay,
the problem starts appearing and becomes worse as I continue to decrease the
delay.
The driver for the onboard ethernet controller is from the Luminary driver
library. I don't imagine that a very high percentage of users here use the
same chip I'm using, but generally speaking, any idea what I can look for; what
would cause this? I'm mainly recieving data. It's streaming audio data so
once I initiate it, the stack only has to ACK.
_______________________________________________
lwip-users mailing list
[email protected]
http://lists.nongnu.org/mailman/listinfo/lwip-users
