Subject:
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Re: Ultrasonic sensor interactions
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 21 May 2006 18:15:49 GMT
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Viewed:
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7272 times
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Hello Brian,
> Specificly, I can not find a way to turn off the US sensor from the
> LEGO-provided SW environment. There may very well be some functionality at a
> lower level I don't have access to (at the moment), or LEGO themselves may do
> something about this (after all, for FLL it will be an issue).
That's easy to do in NBC, and not hard with NXT-G: to shut off the US sensor,
just "use" another sensor type on the same port. Here is a sample program that
switches the US sensor on/off with NXT enter button.
http://www.brickshelf.com/gallery/Philo/Misc/test_stop_usd.png
> > If the sensor actually pings 10 times a second...
>
> I've not been able to exactly measure how fast the US sensor pings, but from
> simply (trying!) to count the barely audiable pings it seems around 10/second.
> But another interesting fact comes up when I do that - I can hear variation in
> the ping rate.
At low level sample rate can be changed - and even a single shot mode is
available - but presently NXT-G doesn't give access to these features
Philo
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Message has 2 Replies:
 | | Re: Ultrasonic sensor interactions
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| (...) I'm not positive of that. If the US sensor is plugged in to a powered NXT, I can detect a clicking from it - I presume it's on. Regardless of what sensor I define the port as, this clicking continues. This is what I was basing my "can't turn (...) (20 years ago, 21-May-06, to lugnet.robotics)
| | | Re: Ultrasonic sensor interactions
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| (...) ; us_off.nbc ; ---...--- variable declarations ---...--- dseg segment ;------- definitions ------- TCommLSWrite struct Result sbyte Port byte Buffer byte[] ReturnLen byte TCommLSWrite ends ;------- declarations ------- thePort byte 0 // port 1 (...) (20 years ago, 22-May-06, to lugnet.robotics)
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Message is in Reply To:
| | Re: Ultrasonic sensor interactions
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| (...) I was the one that mentioned that I couldn't find a way from the SW I have to turn the US sensor off. That said, I don't think it's time yet to worry about intractable problems: A hundred of us or so have been playing with this stuff for a (...) (20 years ago, 21-May-06, to lugnet.robotics)
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