Re: GNAT verses A# for soft-realtime system
- From: "Chip Orange" <Chip.Orange@xxxxxxxxxxxxxxx>
- Date: Mon, 9 Apr 2007 13:44:03 -0400
"Rob Veenker" <veenker@xxxxxxxxx> wrote in message
news:461a279f$0$79139$e4fe514c@xxxxxxxxxxxxxxxxx
Chip and Allie Orange wrote:
"Jeffrey R. Carter" <jrcarter@xxxxxxx> wrote in message
news:2IWRh.39480$_c5.25338@xxxxxxxxxxxx
Chip and Allie Orange wrote:
I can purchase a Windows-based PC robot for $5k, and I'd like to learn
to program it to do autonomous functions (including realtime image
analysis).
I have a choice of GNAT or A# for my programming environment.
A# is a version of GNAT that targets .net.
If you're willing to pay $5k for your robot, you might be willing to pay
10% or less of that for a supported compiler. AdaCore doesn't provide
anything in that price range, but both Aonix and RR SW do.
Whether you go with a supported compiler, or with a free version of GNAT
(including A#), you have a couple of decisions to make. One is which
version of Ada you want to use. Only GNAT GPL implements most of the
most
recent version; A# and the commercial compilers implement Ada 95.
The other is the target platform you want to use. Apparently you have a
Windows target but could also use .net on top of that. Using .net would
constrain you to A#.
These are not decisions we can make for you. GNAT GPL has some errors in
the new features, but if you're interested in learning the new version
of
Ada, that might be the way you want to go. If you'd rather have support
and Ada 95 is acceptable, a commercial compiler would probably be your
choice. If you'd like to use existing .net SW, A# would be the way to
go.
Thanks Jeff.
I am constrained by an NDA from saying why .net offers me some
advantages,
but it does.
You've helped answer one of my questions, in that I now understand A# is
Ada95, while GNAT/GPL is Ada2005. I was interested in Ada2005, as long
as
I'm bothering to throw my time and money into this.
My question was also, does .net have something about it that makes it a
poor
environment for soft real-time systems? Especially, does it produce code
that's noticeably slow, or that garbage collects in some way that would
make it less than desirable for real-time systems with very limited CPU
resources?
Do the additional features of 2005 target real-time systems?
Finally, are the products from compiler vendors (Aionix and RR) that much
better than GNAT/GPL?
Thanks again.
Chip
You may want to take a look at
http://www.adacore.com/wp-content/files/attachments/adacore_news_1106_web.pdf
Thank you Rob. This obviously makes GNAT/Pro attractive to me, but as a
hobbyist, is there a version that I could reasonably afford? Or, will these
features planned for GNAT/Pro also be available in GNAT/GPL?
I'm not quite clear on pricing, or if there are differences in the feature
set of the two versions of GNAT? I believe GNAT/Pro buys you support, but
I'm not sure if it buys you a different compiler or not?
Thanks again,
Chip
.
- References:
- GNAT verses A# for soft-realtime system
- From: Chip and Allie Orange
- Re: GNAT verses A# for soft-realtime system
- From: Jeffrey R. Carter
- Re: GNAT verses A# for soft-realtime system
- From: Chip and Allie Orange
- Re: GNAT verses A# for soft-realtime system
- From: Rob Veenker
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