Subject:
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Re: BrickOS Threading...
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Fri, 13 Dec 2002 04:29:10 GMT
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Viewed:
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2792 times
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Steve Hassenplug wrote:
> In lugnet.robotics.rcx.legos, Mark Riley writes:
> > The motor handler is only called once ever 2ms in
> > the latest version of BrickOS (as opposed to every
> > 1ms in earlier versions). This is a fairly recent change
> > and it could be causing a "granularity" type problem
> > with certain speed settings in your code. • <snip>
> This change seem to improve things. Can I change it back to the way it was
> before?
Steve, Yes, infact I had tested a couple different applications with
the motor controller being called every 1 ms and the same ones with a 2
ms interval. I didn't see a difference with those applications, but did
recognize the possibility that it could have adverse effects.
I will take a look at the code again, if you want; and try to get it
back into cvs right away... if you wish. It all has to do with the
timing of the interrupts and the placement of the code in the interrupt
handler (some code gets executed every 1 ms, other code every 2 ms.
I feel bad that you experienced a problem with this. However, I am
quite happy with the end results of the interrupt update.
// Joe
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Message has 1 Reply:
 | | Re: BrickOS Threading...
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| (...) In trying to balance an RCX on two wheels, every little bit makes a difference. I didn't think it would matter quite that much, but my robot really shakes more with the new version. Thanks for the work, Steve (22 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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