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From: "Rego, P." <pvrego@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Chicken or the egg. New targets & runtimes
Date: Mon, 21 May 2012 12:51:30 -0700 (PDT)
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Date: 2012-05-21T12:51:30-07:00
List-Id: <comp.lang.ada>

> For example, if you have 4 tasks and divide memory equally, each task
> gets only about 512 bytes (2KB total / 4 =3D 512b and you need to
> reserve a little for the scheduler also). In addition, task switching
> overheard might become quite big, since you need to save quite many
> registers in every switch and processor CPU frequency is limited to
> 20MHz at maximum.

Well, 512B is exactly the amount of SRAM an AVR Minumus (AT90USB162 - 512B =
SRAM, 16KB Flash and 16MHz) has available, so it's not so few. I have one, =
and it's quite good for simple control/robotic applications even using as C=
DC (much more as standalone). With this 4-tasking scheme, we would simply h=
ave the equivalent to 4 AT90USB162 running in parallel, but a bit faster, s=
ince ATmega328P is 20MHz, and with more h/w resources. Also the 32KB Flash =
from the ATmega328p would be enough to allocate all the code for the tasks.

> But, I agree that (implementing) the tasking would be interesting,
> whether or not it being useful. :)

Yes, but I believe it will be useful :-)