From: mjsilva@scriptoriumdesigns.com
Subject: Re: Point a beginner in the right direction? Cheap bare-board to run with a RTOS for running ADA
Date: Mon, 8 Jul 2013 17:19:34 -0700 (PDT)
Date: 2013-07-08T17:19:34-07:00 [thread overview]
Message-ID: <6f36b546-7087-4ddc-b118-28e83a226c6a@googlegroups.com> (raw)
In-Reply-To: <1ca073mj5nq7$.8644vkeirvf4$.dlg@40tude.net>
On Monday, July 8, 2013 1:45:21 PM UTC-7, Dmitry A. Kazakov wrote:
> Consider frequency measuring. When a digital input toggles you have to
>
> latch the real-time clock. Usually it is done from the interrupt routine.
>
> The latency determines the error in the time/frequency measurement.
Actually, with any of the smallish micros that we're talking about, the capture of the timer value can be made to happen automatically upon the input change. At the same time an interrupt can be generated to save off or otherwise deal with the just-captured value.
> Polling becomes problematic when there are many inputs to handle or when
>
> signals may get lost. The later is the case when you have to react on the
>
> edge rather than on the level as in the example above.
Interrupts are critical for most systems built around the smallish micros many of us are talking about.
next prev parent reply other threads:[~2013-07-09 0:19 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
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 [this message]
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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