[Tfug] Just starting - need help

[Joe Blais]

Don -

Yes, I've looked at things like RT linux, and some other kernel mods that
make it faster ---

But for now, we got the touch screen running, and I did a xlib hello world
that runs -- so even though I can't compile the kernel just yet, I can get
things going

Thank you all for the help....

Joe


-----Original Message-----
From: tfug-bounces at tfug.org [mailto:tfug-bounces at tfug.org]On Behalf Of
Bexley Hall
Sent: Tuesday, October 03, 2006 3:40 PM
To: Tucson Free Unix Group
Subject: Re: [Tfug] Just starting - need help



--- Joe Blais <joe.blais at pti-instruments.com> wrote:

> QNX --  :-)
> I worked with that way back when -- It was great ---
> I was trying to get that for this project --but
> bosses like cheap :-(

There's no free lunch -- as you may end up proving to
them in the next few months!  :-/

> The devices we make need some degree of
> real-timedness. XP worked
> sufficiently fast, with a 1gig processor, so we
> figured we could live with Linux on a small card.

Don't fall into the trap of confusing "fast" with
"real-time".  :-(  Make *sure* you understand your
exposure, there (I sincerely doubt the linux kernel
was written -- or REwritten -- with deteministic,
bounded algorithms throughout, etc.).  Many real-time
linux products work by providing a seaparate
mechanism *outside* the kernel that provides
real-time guarantees.  And an interface to Linux
for the non-real-time GUI-type things.

> The problem with winders is the forced upgrades to
> bigger and faster processors means upgrading devices
> we build..... calling home...

Yup.  And,depending on the industry in which you are
working, being unable to escrow sources could be a
deal-breaker.

> XP embedded is a fallback.

My condolences!  :>
--don

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