[En-Nut-Discussion] Does porting to ATMega644 makes sense?

[Dusan Ferbas]

Hi,

good luck with that project.

 From my experience, 4kB RAM is too low for any serious IP 
application. We have Modbus, snmp, 3 http threads, 2 threads for 
serial (+rxi5, arp, tcpsm, multiwatchdog). We had problems even with 
32kB RAM. Now with 64kB (nearly) these problems are gone.

Here is Eric's web site with a small module with this chip: 
http://www.chip45.com/index.pl?page=Crumb644-Net&lang=en. He provides 
uIP stack.

---
If someone wants to cooperate on porting Nut/OS to Freescale Coldfire 
platform, I am prepared.

Dusan

>From: Ole Reinhardt <ole.reinhardt at kernelconcepts.de>
>Date: Tue, 05 Jun 2007 12:11:09 +0200
>
>Hi all,
>
>I just got a nice little AVR Board with a microchip SPI Ethernet
>Controller.
>
>http://www.lochraster.org/etherrape/
>
>I'm thinking about porting NutOS to this device. Does anybody knows
>about the real life memory footprint of different NutOS components? As
>the used ATMega644 does not support any external memory NutOS is limited
>to the internal 4K of SRAM. Flash is plenty enough for small
>applications (64K).
>
>So I would try to do the job if it makes sense. I have plenty experience
>on the mega128 platform, but not that much with those limited devices.
>At least it should be possible to run the network stack, http deamon and
>some little applications.
>
>I'm looking forward to you comments.
>
>Bye,
>
>Ole Reinhardt


Dusan Ferbas
www.etech.cz