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Date: Sat, 3 Dec 2011 11:47:28 -0500
Message-ID: <CAPYb0EFGjYUVh_g3ru5dENV2713_EyHF0Fqy4j_DcQtpjhNHBg@mail.gmail.com>
Subject: Re: [geda-user] Re: I won't do BGA's
From: Bob Paddock <bob DOT paddock AT gmail DOT com>
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On Sat, Dec 3, 2011 at 11:19 AM, Dave McGuire <mcguire AT neurotica DOT com> wrote:

>  Please forgive me for jumping in, but I was just handed responsibility for
> a biggish project at work that is AVR-based.  I'm primarily an ARM and mcs51
> guy, and this was my first exposure to AVR. So far so good; I'm enjoying it.

Have no real complants about the chips, other than wishing they'd fix
the known bugs in them.
They rarely do that.  My complaints are with Atmel.

>  About the GCC support having been good in the past...I build all of my own
> GCC cross compilation toolchains, because most of the pre-built ones I've
> found out there have disappointed me at one time or another. I'm currently
> at 4.4.6.  The AVR support in that release seems to be just fine.  Is there
> some point in a later release where things are suboptimal?

Something to do with changes in internal register allocation changes
of GCC, as far as the AVR was concerned.

4.3.4 is still the official recommended version.  Jörg  wants people
to test the 4.6.x stuff.
I'd skip anything in 4.4 and 4.5.
Bingo's conical build script is here:
http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=42631&postdays=0&postorder=asc
Unless you have a very new part that is not supported, there is not a
lot of reason to use the newer stuff for the AVR.

Do make sure you are up to date on all of the patches, and using the
latest version of AVR-LibC.  1.7.0 had all of the delay functions
broken.
I document a particularly nasty problem with the XMega here:
http://blog.softwaresafety.net/2011/02/anatomy-of-race-condition-toyota-vs-avr.html


>  Heh.  I'd quit. ;)

I've thought of it.  Even thought of going out on my own, problem is I
don't know how to answer the question "Where are your customers going
to come from?".

> Dave McGuire
> New Kensington, PA

Thought you where in Florida?  Your only about 70 miles from me now.



-- 
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