From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Point a beginner in the right direction? Cheap bare-board to run with a RTOS for running ADA
Date: Sun, 7 Jul 2013 17:00:34 +0200
Date: 2013-07-07T17:00:34+02:00 [thread overview]
Message-ID: <u6bg0ssfhm3z$.n67nistd8o0o.dlg@40tude.net> (raw)
In-Reply-To: krbhkg$b18$1@dont-email.me
On Sun, 7 Jul 2013 10:58:24 +0000 (UTC), Simon Clubley wrote:
> On 2013-07-07, Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote:
>> On Sun, 7 Jul 2013 02:16:29 -0700 (PDT), Lucretia wrote:
>>
>>> Why not just buy a small SBC and just target Ada directly on the hardware.
>>> You don't have to have an OS at all.
>>
>> There exist heaters better than a computer performing pointless
>> calculations without any I/O.
>
> Sorry, Dmitry, but that's so out of touch I don't really know how to
> respond so I will just say you don't need a OS to provide I/O services.
>
> You create some routines around the hardware which the rest of your code
> can use to talk to the hardware and you structure your I/O support
> library so that only the modules needed by the application are actually
> linked in.
And this is what basically an OS is - a set of routines around the
hardware.
Either the application does nothing beyond integer arithmetic or else you
need an OS. Even most simple things like FPU or system timers would require
functionality attributed to an OS. Any I/O on a modern machine would
involve quite complicated hardware protocols like SPI, I2C, DMA, and
extremely complicated software protocols like TCP and stuff upon it. The
question is only who is going to write and maintain all this stuff.
Just which is the ratio of he application code to "some routines around the
hardware"? 1:0? 1:1? 1:1000? How about complexity of both?
Small SBC + 1:1 suggests creation of a heater.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2013-07-07 15:00 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-19 7:51 Point a beginner in the right direction? Cheap bare-board to run with a RTOS for running ADA Marcus F
2013-06-19 18:20 ` Point a beginner in the right direction? Cheap bare-board to run with a RTOS for running Ada Jacob Sparre Andersen
2013-06-19 18:59 ` Marcus F
2013-06-19 19:25 ` Marcus F
2013-07-12 20:35 ` Rego, P.
2013-07-12 20:37 ` Rego, P.
2013-07-07 9:16 ` Point a beginner in the right direction? Cheap bare-board to run with a RTOS for running ADA Lucretia
2013-07-07 9:56 ` Dmitry A. Kazakov
2013-07-07 10:58 ` Simon Clubley
2013-07-07 15:00 ` Dmitry A. Kazakov [this message]
2013-07-07 16:27 ` Niklas Holsti
2013-07-08 7:43 ` Dmitry A. Kazakov
2013-07-08 10:54 ` G.B.
2013-07-08 12:14 ` Dmitry A. Kazakov
2013-07-08 12:56 ` Simon Clubley
2013-07-08 14:06 ` Dmitry A. Kazakov
2013-07-08 14:43 ` G.B.
2013-07-08 17:23 ` Simon Clubley
2013-07-08 18:55 ` Dmitry A. Kazakov
2013-07-09 11:53 ` Simon Clubley
2013-07-09 12:57 ` Dmitry A. Kazakov
2013-07-09 13:11 ` Simon Clubley
2013-07-09 20:30 ` Randy Brukardt
2013-07-09 22:23 ` Georg Bauhaus
2013-07-10 8:06 ` Dmitry A. Kazakov
2013-07-10 12:25 ` Simon Clubley
2013-07-10 22:17 ` Randy Brukardt
2013-07-11 16:58 ` Eryndlia Mavourneen
2013-07-11 22:07 ` Randy Brukardt
2013-07-08 13:15 ` G.B.
2013-07-08 13:59 ` Dmitry A. Kazakov
2013-07-09 0:53 ` mjsilva
2013-07-08 20:31 ` Randy Brukardt
2013-07-08 20:45 ` Dmitry A. Kazakov
2013-07-09 0:19 ` mjsilva
2013-07-09 0:27 ` mjsilva
2013-07-09 7:51 ` Dmitry A. Kazakov
2013-07-09 8:33 ` Georg Bauhaus
2013-07-09 9:12 ` Dmitry A. Kazakov
2013-07-09 11:08 ` G.B.
2013-07-09 12:28 ` Dmitry A. Kazakov
2013-07-09 14:20 ` G.B.
2013-07-09 15:00 ` Dmitry A. Kazakov
2013-07-09 23:13 ` Peter C. Chapin
2013-07-09 15:38 ` mjsilva
2013-07-09 19:48 ` Dmitry A. Kazakov
2013-07-09 20:10 ` Randy Brukardt
2013-07-09 22:09 ` Georg Bauhaus
2013-07-10 22:21 ` Randy Brukardt
2013-07-11 6:12 ` Georg Bauhaus
2013-07-11 22:00 ` Randy Brukardt
2013-07-10 1:31 ` mjsilva
2013-07-10 8:17 ` Dmitry A. Kazakov
2013-07-10 22:39 ` Randy Brukardt
2013-07-09 13:53 ` Shmuel Metz
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