Re: [lwip-users] LWIP size

[Oscar F]

Hello, i think i ´ll move the heap and data to SDRAM. I read the application note, but i don´t know exactly that files create or edit because i have lwip and freeRTOS.

My first idea is to do:

a) edit the crt0.x of the project
b) edit init_startup function in the port directory of FREERTOS
c) Add de link_... .lds  to the project
d)  change the option of linker

Do you follow this step?
Thanks
Oscar

On Thu, Oct 1, 2009 at 7:05 PM, Oscar F <address@hidden> wrote:

Hello one question, if i defined one buffer very big, is necesary to increase alot the stack of the task. My memory is 64k too and i have FreeRTOS and lwip. I need to create a buffer of 20000bytes.

Do you think i have enough memory or i need to move all memory to SDRAM?

thanks

Oscar

On Thu, Oct 1, 2009 at 6:05 PM, Dany Thiffeault <address@hidden> wrote:

great, thanks!

I tried many things, but not this one.

Also, I want to point out that in the meantime, I decided to move my heap to my SDRAM instead of the 64k SRAM on the AVR32UC3. Now I have enough space to create all my tasks without problem, even with bigger stack sizes.

On Thu, Oct 1, 2009 at 1:09 AM, Mathias Zenger <address@hidden> wrote:

check this:

http://support.atmel.no/bin/customer?=&action="">

mathias

-----Ursprüngliche Nachricht-----
Von: lwip-users-bounces+m.zenger=mobatime.com@nongnu.org [mailto:lwip-users-bounces+m.zenger=mobatime.com@nongnu.org]Im Auftrag von Dany Thiffeault
Gesendet: Mittwoch, 30. September 2009 17:42
An: Mailing list for lwIP users
Betreff: Re: [lwip-users] LWIP size

Thanks Bill, good idea. 

I'm still trying to figure out how to generate the MAP file with AVRStudio 2.1...

On Tue, Sep 29, 2009 at 5:30 PM, Bill Auerbach <address@hidden> wrote:

Check you MAP file and find out where RAM has been allocated.  It’s easy to allocate too many PBUF_POOLs and run out of memory that way.

 

Bill

 

From: lwip-users-bounces+bauerbach=arrayonline.com@nongnu.org [mailto:lwip-users-bounces+bauerbach=arrayonline.com@nongnu.org] On Behalf Of Dany Thiffeault
Sent: Tuesday, September 29, 2009 3:56 PM
To: Mailing list for lwIP users
Subject: [lwip-users] LWIP size

 

Hi,

 

I would like to know what is the expected (approx.) size of the lwip stack. I use sequential configuration. My problem is that on my AVR32, I only have 64kbytes of SRAM and for some reasons, it is full. I'm trying to run my application using FreeRTOS and lwip. When I create tasks, my last one always fail on the malloc.

 

So, I'm assuming that FreeRTOS and lwip take a significant amount of space on my AVR32 in SRAM because my tasks have those sizes (presented in order of creation):

 

1- lwip Main task:                        512

2- Startup task (my own):            512

3- FreeRTOS Scheduler:             256

4- Ethernet task (my own):          512

5- Ethif (lwip):                             256

6- Diags task (my own):              512

 

The last one is the one that fails. So, out of 64kbytes, my tasks take much less memory. I another project not using lwip, I was able to create 3 tasks of 1024,  4096 and 4096 of size. So, I presume lwip takes a significant amount of space.

 

If yes, how could I tweak the config to reduce the size taken?

 

Best regards,

DownyTif.

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