[En-Nut-Discussion] Using NutOS without external SRAM?

[Lars Andersson]

Marc,

Is there any special considerations one has to take into account for the minimal HW configuration you are using ? Any experience with the mega256?

Regards,
Lars A Andersson

-----Original Message-----
From: Marc Wetzel [mailto:mwse at gmx.de]
Sent: den 9 maj 2004 12:49
To: en-nut-discussion at egnite.de
Subject: [En-Nut-Discussion] Using NutOS without external SRAM?



Hi,

I'm not really a newbie concerning Nut/OS but it seems I'm running against a
wall here...

I have the problem that a minimal system (atmega128,8MHz) with only one
running task (not counting the idle-task and main) goes booboo
everytime it tries to execute fprintf right after registering one
uart-device.

I'm using the latest NutOS - but I dont think this is a problem with the
code but with too much RAM consumed at the wrong places.

So, my question is: How much RAM is minimum, if I want to use 2 buffered
uarts and 2 tasks?

How much memory should each task have? I already tried to tweak nutinit.c in
a project-local copy, because ~1500byte heap is allocated to the main-task
and I tried to reduce this step by step. 

TIA
/Marc

_______________________________________________
En-Nut-Discussion mailing list
En-Nut-Discussion at egnite.de
http://www.egnite.de/mailman/listinfo.cgi/en-nut-discussion