Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)?

From	rickman <gnuarm.deletethisbit@gmail.com>
Newsgroups	comp.arch.embedded
Subject	Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)?
Date	2018-01-04 14:31 -0500
Organization	A noiseless patient Spider
Message-ID	<p2lve0$tuv$1@dont-email.me> (permalink)
References	(4 earlier) <p1bg2u$5ke$2@dont-email.me> <p2igr5$j9j$1@dont-email.me> <p2j5mn$bev$2@dont-email.me> <p2jqj6$9jq$1@dont-email.me> <p2kotf$cu9$1@dont-email.me>

Show all headers | View raw

rickman wrote on 1/4/2018 3:33 AM:
> Les Cargill wrote on 1/3/2018 6:59 PM:
>> rickman wrote:
>>> Les Cargill wrote on 1/3/2018 7:07 AM:
>>>> rickman wrote:
>>>>> Ed Prochak wrote on 12/19/2017 11:19 AM:
>>>>>> On Saturday, December 16, 2017 at 12:56:31 PM UTC-5, Les Cargill wrote:
>>>>>>> Mike Perkins wrote:
>>>>>>>> On 09/12/2017 16:05, pozz wrote:
>>>>>>>>>
>>>>>>>>
>>>>>>>> I use it where I have a number of 'tasks' which then interact with each
>>>>>>>> other.
>>>>>>>>
>>>>>>>> If your system is a pure state machine then there is no need for an
>>>>>>>> RTOS.
>>>>>>>>
>>>>>>>
>>>>>>> Indeed. Indeed.
>>>>>>
>>>>>> If it is just one state machine. Then yes, indeed.
>>>>>> ed
>>>>>
>>>>> It can always be one state machine.  The only issue is how complex the
>>>>> combined state machine is.
>>>>>
>>>>
>>>> It's always a case of "how long should a man's legs be?" Lincoln
>>>> is alleged to have said "long enough to touch the ground."
>>>>
>>>>> Actually the issue is not how many state machines you have.  It is the
>>>>> timing requirements of the various state machines.  If your timing is lax,
>>>>> sequential operation of multiple machines is easy.  But this often becomes
>>>>> a huge discussion with everyone talking past each other.
>>>>>
>>>>
>>>> They should use state machines to keep track then :)
>>>>
>>>> If your system can be decomposed as roughly events cross
>>>> state, you have a snowball's chance of "understanding" it.
>>>
>>> Sorry, I don't know what this means "roughly events cross state".
>>>
>>>
>>
>> You are in state A. Event 42 occurs. Lookup.... ah, here -
>> if we get event 42 whilst in state A, we move to state B
>> and send message m.
>
> So what makes that so hard to understand?

To be more explicit, I think every FSM I've ever coded was along the lines 
of a case statement on the state with IF conditions on all the interesting 
inputs.  I find this structure to be self documenting if the signal names 
are chosen well.

Why is this structure hard to understand?

-- 

Rick C

Viewed the eclipse at Wintercrest Farms,
on the centerline of totality since 1998

Thread

Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Mike Perkins <spam@spam.com> - 2017-12-10 14:56 +0000
  Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Les Cargill <lcargill99@comcast.com> - 2017-12-16 11:58 -0600
    Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Ed Prochak <edprochak@gmail.com> - 2017-12-19 08:19 -0800
      Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm@gmail.com> - 2017-12-19 11:51 -0500
        Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Ed Prochak <edprochak@gmail.com> - 2018-01-02 14:58 -0800
        Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Les Cargill <lcargill99@comcast.com> - 2018-01-03 06:07 -0600
          Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-03 12:59 -0500
            Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Les Cargill <lcargill99@comcast.com> - 2018-01-03 17:59 -0600
              Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-04 03:33 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-04 14:31 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Rob Gaddi <rgaddi@highlandtechnology.invalid> - 2018-01-04 11:56 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Les Cargill <lcargill99@comcast.com> - 2018-01-04 21:46 -0600
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-04 16:46 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Les Cargill <lcargill99@comcast.com> - 2018-01-04 21:47 -0600
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-06 18:55 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-07 00:54 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-07 13:41 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-07 23:32 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-10 10:33 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-10 16:29 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? upsidedown@downunder.com - 2018-01-08 08:11 +0200
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-07 23:05 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? upsidedown@downunder.com - 2018-01-08 10:06 +0200
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? David Brown <david.brown@hesbynett.no> - 2018-01-08 10:27 +0100
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-08 09:56 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-08 18:39 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-08 12:20 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-08 22:11 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? David Brown <david.brown@hesbynett.no> - 2018-01-08 22:26 +0100
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-08 22:23 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-08 14:44 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-08 23:06 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-08 10:02 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Les Cargill <lcargill99@comcast.com> - 2018-01-08 17:34 -0600
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-06 22:29 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-07 00:46 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Les Cargill <lcargill99@comcast.com> - 2018-01-04 21:44 -0600
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-05 09:12 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-01-05 21:40 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Les Cargill <lcargill99@comcast.com> - 2018-01-05 21:29 -0600
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-06 09:10 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Les Cargill <lcargill99@comcast.com> - 2018-01-06 16:35 -0600
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-07 01:04 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-06 09:17 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Les Cargill <lcargill99@comcast.com> - 2018-01-06 16:37 -0600
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-07 01:11 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-06 17:31 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-07 01:52 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-07 00:39 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-07 09:55 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-07 10:43 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-07 19:35 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-06 19:06 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-06 16:58 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-06 22:37 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-07 00:58 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-07 09:32 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Paul Rubin <no.email@nospam.invalid> - 2018-01-07 10:53 -0800
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-10 11:40 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-07 01:14 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-06 18:57 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-07 01:17 +0000
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-06 22:40 -0500
                Re: When exactly do you choose to use a RTOS (instead of a non-OS approach)? Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-01-07 09:59 +0000

csiph-web