From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,3025dd6d917b499c X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Received: by 10.180.93.6 with SMTP id cq6mr3444439wib.2.1353446756484; Tue, 20 Nov 2012 13:25:56 -0800 (PST) Path: q13ni212wii.0!nntp.google.com!feeder3.cambriumusenet.nl!feed.tweaknews.nl!194.109.133.87.MISMATCH!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!feeds.phibee-telecom.net!newsfeed.straub-nv.de!nuzba.szn.dk!news.jacob-sparre.dk!munin.jacob-sparre.dk!pnx.dk!.POSTED!not-for-mail From: Tero Koskinen Newsgroups: comp.lang.ada Subject: Re: Ada, the best language with the not-so-best tool chain Date: Tue, 20 Nov 2012 23:25:55 +0200 Organization: Jacob Sparre Andersen Research & Innovation Message-ID: <20121120232555.32c1a7196fb117eec5fdb664@iki.fi> References: <38af7fb8-b0a4-4a31-87aa-b7b698cc89c3@googlegroups.com> <85k3v0jqj0.fsf@stephe-leake.org> <5df9e216-b808-419e-91ac-19b7fe7dc153@googlegroups.com> <857gqyg9gq.fsf@stephe-leake.org> <87wqxwzfeh.fsf@adaheads.sparre-andersen.dk> NNTP-Posting-Host: 84.249.65.244 Mime-Version: 1.0 X-Trace: munin.nbi.dk 1353446755 9250 84.249.65.244 (20 Nov 2012 21:25:55 GMT) X-Complaints-To: news@jacob-sparre.dk NNTP-Posting-Date: Tue, 20 Nov 2012 21:25:55 +0000 (UTC) X-Newsreader: Sylpheed 3.2.0 (GTK+ 2.24.13; x86_64-redhat-linux-gnu) Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Date: 2012-11-20T23:25:55+02:00 List-Id: On Thu, 08 Nov 2012 12:07:34 +0400 Jacob Sparre Andersen wrote: > Stephen Leake wrote: > > > Which raises the question; why insist on "bareboard", instead of a > > well supported OS that does what you need? > > Because it is hard to find a well supported OS that does what you need? > We are using Linux on ARM underneath an application we are developing at > the moment, but I'm a bit worried about the timing properties of having > a full OS running. We may end up solving the problem by having a > hardware or a kernel-space clock triggering the microcontrollers running > the jitter-sensitive parts of the application. This way we may miss > some measurements, but those we get will be from well-defined times. If you don't need accurate real-time properties, Linux+Ada on ARM is the easiest and the cheapest way to run Ada on ARM device. Cheapest ARM boards capable of running Linux(Debian) are something like 24 euros[1], about same as Arduinos and cheaper than Raspberry Pi. About a year ago I asked from AdaCore how much it would cost to have GNAT Pro (1y subscription) for bareboard ARM microcontroller board (cortex-m3). As you can probably guess, the price was high, which led me to port GNAT to Debian/armhf myself[2]. But at least now, they (AdaCore) cannot say there has been no demand for ARM. ;) -- Tero Koskinen - http://iki.fi/tero.koskinen/ [1] https://www.olimex.com/Products/OLinuXino/iMX233/iMX233-OLinuXino-MICRO/ [2] http://lists.debian.org/debian-ada/2012/04/msg00027.html