Subject:
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Re: light sensor question
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Thu, 24 Jul 2003 14:09:31 GMT
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Viewed:
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3040 times
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Aaron Goodman <lone(underscore]iguana@hotmail[do.t]com> writes:
>
> The Analog to Digital converter of the h8/300 (the brains
> of the lego mindstorms) is 10 bits, so it has a range of
> 0-1023. I'm not sure how it converts that to the 0-100, it
> may do it by just dividing by 10 and rounding.
According to Kekoa Proudfoot's RCX Internals webpage
(http://graphics.stanford.edu/~kekoa/rcx/):
if (raw < 187) // bug? this allows percent=101, should be raw < 189
sensor->value = 64
else
sensor->value = (3ff - raw) * 19 / 9c
Numbers are in hexadecimal (base 16).
Jürgen
--
Jürgen Stuber <stuber@loria.fr>
http://www.loria.fr/~stuber/
> rot 13 "fr"
"se"
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Message is in Reply To:
 | | Re: light sensor question
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| (...) The Analog to Digital converter of the h8/300 (the brains of the lego mindstorms) is 10 bits, so it has a range of 0-1023. I'm not sure how it converts that to the 0-100, it may do it by just dividing by 10 and rounding. If you want to see (...) (21 years ago, 24-Jul-03, to lugnet.robotics.rcx)
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