Subject:
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Re: Reading sensors at equal intervals.
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 26 Apr 1999 11:04:22 GMT
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Original-From:
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S. Crawshaw <sc10003@eng.SAYNOTOSPAMcam.ac.uk>
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Viewed:
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1373 times
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On Sun, 25 Apr 1999, Kekoa Proudfoot wrote:
> > > By standard firmware, I assume you mean using the byte codes ala NQC or • <snip>
> You are right, the timer values as seen by the firmware are in 1/10ths of a
> second. I lost myself in H8-land, which has a 1 ms timer that gets divided
> down before being seen by the firmware.
That looks like a "no" then...
How does the timing of tasks work? I seem to recall reading somewhere that
the firmware executes the tasks in sequence - is there any timing element
to this, or does it just do task 1, then immediately onto task 2, etc, and
back to task 1 when it's done. (I'm hoping that it starts each task at a
predictable time...) Or have I got this completely wrong?!
Alternatively, if leave NQC etc behind and go to "H8-land", is it possible
to use LegOS or similar to generate a software interrupt at regular
intervals?
Failing that, I'm willing to write in pure H8 assembly language if
necessary (although I don't really want the hassle of setting up the H8
stuff for gcc)
Stuart
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | Re: Reading sensors at equal intervals.
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| (...) IIRC, it preferentially executes a single instruction received from the IR connection, otherwise takes the next instruction from the next task and executes that instead. (...) Probably. I don't think LegOS supports (what I'd call) a software (...) (26 years ago, 26-Apr-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: Reading sensors at equal intervals.
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| (...) You are right, the timer values as seen by the firmware are in 1/10ths of a second. I lost myself in H8-land, which has a 1 ms timer that gets divided down before being seen by the firmware. -Kekoa (26 years ago, 25-Apr-99, to lugnet.robotics)
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