Re: rtos features

From: David Brown (david_at_no.westcontrol.spam.com)
Date: 06/22/04 

Date: Tue, 22 Jun 2004 17:24:26 +0200

"Not Really Me" <scott@exoXYZtech.com> wrote in message
news:RMXBc.17$7e3.7669@news.uswest.net...
> Sagar wrote:
> > hello,
> >
> > i am evaluating various rtos for on of our products based on arm7. i
> > have been looking at Nucleus, embOS, Rtxc, Threadx and MicroC os-ii.
> > Of the lot Threadx and embOS seem to be good. Although i believe that
> > the others are just as good. It seems hard to zero in one choice. I
> > have been searching for reviews in the newsgroups. I have found some
> > scattered info for nucleus and threadx (threadx apparently seems to be
> > better).
> >
> > I am primarily looking at these features:
> > Scheduling, events, queues, low interrupt latencies, small mem
> > footprint, fast context switching, ....
> >
> > I would appreciate if somebody could post their views/experiences on
> > these rtos'.
> >
> >
> > Thank you
> > Sagar
>
> I am very partial to MicroC/OS-II. It offers all the features you list
> including fast context switching. It has been ported to all kinds of
chips
> based on ARM7 and ARM9 cores and the ports are available freely from
> Micrium's web site. Jean Labrosse published a book on the OS (available
on
> their web site or from Amazon) and the book includes a CD with all of the
> source code. You can have it all for about US$70. A production license
is
> under $3000.
>
> MicroC/OS-II has also been tested extensively for use in safety critical
> systems.
>

When you say a production license is under $3000, what sort of quantities is
that for? Do they make a distinction between a product with, say, 50 units
a year, and one with several thousand? And do you need a seperate license
for different products (or different versions of the same product)?

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