Re: [lwip-users] lwip fails for full duplex communication

[lookwong]

I don't think lwip spports full duplex mode.

On Tue, May 22, 2012 at 12:36 PM, GICINDIA <address@hidden> wrote:

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
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>

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