[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [lwip-users] lwip ARP reply delay at first time

From: Sergio R. Caprile
Subject: Re: [lwip-users] lwip ARP reply delay at first time
Date: Wed, 15 Apr 2015 09:32:28 -0300
User-agent: Mozilla/5.0 (Windows NT 5.1; rv:31.0) Gecko/20100101 Thunderbird/31.6.0

Dmitriy, you seem to have a non-working port and/or a non-working driver.
FCS errors are not intentionally generated, so you can't correct them
unless you know why they are there. So... I'll assume you mean those
errored frames belong to the lwIP board. FCS should be correctly
generated by a correctly initialized Ethernet chip; check your driver,
check your cable.
The delay between frames can be because of an RTOS task polling the chip
instead of an interrupt driven rx framework. Check your port.
The initial delay... if you connect two machines together without a
hub/switch, one of them needs to reverse its function (unless you use a
crossover cable), that might be both Ethernet chips trying to satisfy
the other. A correctly configured chip shouldn't take long, but... check
your driver, try with a switch or a crossover cable if you can't get a
In any case, you should step through your code to find some answers.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]