Subject:
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Re: Receiving IR data
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 18 Apr 2001 12:41:59 GMT
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Original-From:
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Greg Frazier <gregory.frazier@saic(IHateSpam).com>
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Viewed:
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1245 times
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Actually, there is a mistake in James' web page. He wrote:
The middle portion of the data (red) are the opcodes you want to send to the RCX, followed by the two's complement of the
opcode.
In fact, it is followed by the 1's complement of the opcode. x55 is followed by xAA, x00 is followed by xFF, etc. I'd send this strait
to James, but I haven't been following this thread, so I don't know what his email address is - sorry, list-members.
-- Greg Frazier
Stef Mientki wrote:
> Hi James,
>
> James Matthews wrote:
>
> > Hi there,
> >
> > Thanks Stef for that *very useful* piece of information, I've now cracked it
> > and wrote up a little article on it:
> >
> > http://www.generation5.org/aisolutions/rob08.shtml
>
> Nice and above simple overview of the IR-communication !
> My first attempts were unsuccesfull, because I didn't know you had to invert the "third-bit", thanks to you my attempts gives results.
> The rough notes on my project can be seen at
>
> http://baserv.uci.kun.nl/~smientki/Lego_Knex/Lego_electronica/Data_acquisition.htm
>
> For testing a use a simple general purpose RS232 program, which can also be found on my page.
> By the way, did you try the 4800 Hz communication (or at least receiving at 4800 Hz should be possible I read from NQC) ?
>
> >
> >
> > It is only preliminary, but I thought people might like to see it. There is
> > some C++ code snippets and the protocol explanation, using the battery level
> > indicator as an example.
> >
> > Regards,
> >
> > James.
> >
> > - James Matthews
> > Generation5: http://www.generation5.org/
> > "...At the forefront of Artificial Intelligence..."
>
> regards, Stef Mientki
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Message is in Reply To:
 | | Re: Receiving IR data
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| Hi James, (...) My first attempts were unsuccesfull, because I didn't know you had to invert the "third-bit", thanks to you my attempts gives results. The rough notes on my project can be seen at (URL) testing a use a simple general purpose RS232 (...) (23 years ago, 16-Apr-01, to lugnet.robotics)
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