Re: [lwip-users] XAPP663 (TCP/IP on V2P devices using lwIP) problem

[Mechouk Nicolas]

Thanks Bill.

It was a useful answer....But I've an other question.

For my application, I only need one connection from my client (my XUP V2P) to my server (my PC). I've no SDRAM on my board, just embedded memory (BRAM).
The sending data size is about 128 bits.

>From lwipopts.h, what are the mininal sizes can I use to keep my ethernet connection functionnal ?

I tried these :                                                            (new  //old value)

#define MEM_SIZE                                 1*1024*1024  //16*1024*1024
#define MEMP_NUM_TCP_PCB                               1  //8
#define MEMP_NUM_TCP_PCB_LISTEN                1 //16
#define PBUF_POOL_SIZE                                        1 //512
#define TCP_SND_BUF                                 16*1024 //32*1024

and echo server still works but I want to use the least possible (I don't know if my english is very correct...... ^^; )

Regards,

Nicolas








Bill Auerbach a écrit :

lwIP memory buffers are statically allocated which can cause BSS to be quite
large if your lwipopts.h defines a lot of storage.  BSS doesn't take up
space in the output (elf) file so it's not uncommon to see programs
requiring much more storage than the output file size.

I hope I hit the mark what you were questioning.

Bill

  

-----Original Message-----
From: address@hidden
[mailto:address@hidden] On
Behalf Of Mechouk Nicolas
Sent: Tuesday, May 20, 2008 12:48 PM
To: Mailing list for lwIP users
Subject: [lwip-users] XAPP663 (TCP/IP on V2P devices using lwIP)
problem

Hi there,

I try to use lwIP to perform a TCP client application on my XUP V2P. I
use files of xapp663 from Xilinx.
But I'm very surprized by the programm size :

text            data    bss               dec               hex
75886        996    17598688    17675570    10db532

The lwIP lib file is about 200Ko and my .elf file isa about 200Ko too.

Anyone can illuminate me on this issue????
Regards,

Nicolas



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