[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [lwip-users] lwip fails for full duplex communication
From: |
GICINDIA |
Subject: |
Re: [lwip-users] lwip fails for full duplex communication |
Date: |
Mon, 21 May 2012 21:36:06 -0700 (PDT) |
Hello Kieran,
Thanx alot for the reply.
If no. of pbufs is the issue then, to resolve this problem can i make
MEMP_NUM_PBUF = 32?
But, i did not understand lwip data transmit logic fully, if possible can u
explain it? so that i can be able to implement some other logic for buffer
handling at serial side before writing data into pbufs.
Regards,
Asma.
Kieran Mansley wrote:
>
> It looks to me like you have 16 pbufs, each of size 256 bytes. Your
> TCP_WND is 2048, so you can have 2KB of data received and waiting for your
> application before the other end will stop sending. Your TCP_SND_BUF is
> 6KB, so you can have that much sent by your application waiting to go onto
> the wire. In total, this makes 8KB of buffering, but you only have enough
> pbufs to hold 4KB (16 * 256). I think this is why you're running out.
>
> Kieran
> _______________________________________________
> lwip-users mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/lwip-users
>
>
--
View this message in context:
http://old.nabble.com/lwip-fails-for-full-duplex-communication-tp33862721p33886914.html
Sent from the lwip-users mailing list archive at Nabble.com.