Subject:
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Re: light sensor problem?
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Mon, 24 Jul 2000 00:23:49 GMT
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Viewed:
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5236 times
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On Mon, 24 Jul 2000, Paolo Masetti wrote:
> > That didn't help either, at least not a whole lot. So... maybe the problem
> > isn't in ds_handler(), but I can't figure out where else it could be.
> > Anyone? Or does everyone else just not care that the scaling is screwed
> > up?
>
> I patched the reading routine in ds_handler to fix a vary bad behavier that
> caused reading for active sensors to be quite random without a small
> delay... Now with the settle time the reading is stable, but also changed in
> values for different offsets... I've fixed rotation sensor values, but...
Oh! So readings are more stable, and it isn't just my imagination. That's
good to know :)
> I've not fixed the scaling factor, because I can't figure why Markus used
> these lines to define upper and lower limits for raw readings... I've also
> asked for it but I got no reply as usual nowadays...
Those values used to pretty cleanly define max and min- or at least, they
must have, since I consistently got 15-105 values (or roughly what he
projected.)
> Please, feel free to change, or investigate these values to fix light
> reading...
Like I said, those values really were pegged to actual read values.
Something has occurred to change them. If it can't be fixed, that's fine.
It wouldn't be too hard to do a little math and make the values "correct."
(i.e., 0-100). However, it won't be nearly as fast as the X>>7 that used
to be used. So, I don't know which is the "correct" answer- to scale
(relatively slowly) or not to scale. What do other users/developers think?
Either way, I have to change documentation, so...
Luis
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"Summertime... and the living is easy...
fish are jumping and the cotton is high...
So hush, little baby, baby don't you cry."
-Ella
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Message has 1 Reply:
 | | Re: light sensor problem?
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| (...) I supposed so, but only to get a "fast scaling"? (...) I can "rescale" those values by theoretical calculation and maintain >>7 or make the right conversion (0-100). Now I've done the right scaling (ready to commit), but I sincerely think that (...) (26 years ago, 25-Jul-00, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Re: light sensor problem?
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| (...) I'm the one that fixed active sensor reading... :-) Settle time is one of mine... Kekoa msg about this problem (a very old one in this ng if I remember) helped me to solve things. (...) I patched the reading routine in ds_handler to fix a vary (...) (26 years ago, 24-Jul-00, to lugnet.robotics.rcx.legos)
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