Subject:
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Re: LEGO remote and LNP (legOS 0.2.4)
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Tue, 6 Feb 2001 04:54:10 GMT
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Viewed:
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1533 times
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Luis,
I can do a quick HOWTO (though it'll only cover Linux) & post this patch. I
think it'd be useful, anyway. It applies cleanly to 0.2.5 as well.
Regards,
ROSCO
Luis Villa <liv@duke.edu> wrote in message
news:Pine.GSO.4.10.10010231305500.4974-100000@teer13.acpub.duke.edu...
> I'd actually really like to include Chris's patch in the official tree,
> but I'm informed by folks with more clue about the networking stuff than
> me that switching the parity bit would probably break some LNP stuff.
> Would everyone be happier if I posted the patch on the site, along with
> some description of how to apply it to stock 0.2.4 and rebuild? I think
> that this seems like a reasonable compromise, unless someone has a better
> suggestion...
> Luis (who is very sorry that he hasn't written to Chris in some time)
>
> On Mon, 23 Oct 2000, Jochen Hoenicke wrote:
>
> > Date: Mon, 23 Oct 2000 16:53:44 GMT
> > From: Jochen Hoenicke <Jochen.Hoenicke@Informatik.Uni-Oldenburg.DE>
> > To: lugnet.robotics.rcx.legos@lugnet.com
> > Subject: Re: LEGO remote and LNP (legOS 0.2.4)
> >
> > On Oct 23, Rasmus Kjeldsen wrote:
> > > Hi
> > >
> > > I've just got the LEGO remote control (from the Ultimate Accessory • Kit), and
> > > of cause it dosen't work with legos. So I tried to see, if anyone had • done
> > > some kind of driver to it, but I couldn't find any, and began hacking • in the
> > > legOS kernel (kernel/lnp.c), to see, if I could alter the LNP driver • to accept
> > >
> > > messages from the remote. It nearly works, but strangly enough, a • couble of
> > > bytes is missing. I receive the following bytes for "message 1": (out • of my
> > > memory)
> > >
> > > 55 ff 00 2d d2 00 ff 2d d2
> > >
> > > But if I use a program on my Linuxbox, which receives the signal from • the ir-
> > > tower, I get:
> > >
> > > 55 ff 00 2d d2 00 ff 01 fe 2d d2
> > > So the question is: Why are the 01 fe bytes missing???
> >
> > The remote control sends with parity odd, but the rcx is programmed to
> > no parity. If the parity bit has the same value as a undriven line (I
> > think it is logical 1), the byte is received, but otherwise the byte
> > gets thrown away by the serial hardware.
> >
> > The fix is of course to put the serial in odd parity mode. There was
> > a patch by Chris Arquiza on this list some time ago (18. July) and I'm
> > using it (slightly modified) without problems. For convenience I have
> > now put the patch I am using at:
> >
> > http://www.informatik.uni-oldenburg.de/~delwi/legOS/remote.diff
> >
> > Jochen
> >
> >
>
> -----------------------------------------------------------------------
>
> "It's clear to us that Microsoft isn't the competition anymore.
> They are our environment."
> WordPerfect manager, talking about Word
>
> -----------------------------------------------------------------------
>
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Message is in Reply To:
 | | Re: LEGO remote and LNP (legOS 0.2.4)
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| I'd actually really like to include Chris's patch in the official tree, but I'm informed by folks with more clue about the networking stuff than me that switching the parity bit would probably break some LNP stuff. Would everyone be happier if I (...) (24 years ago, 23-Oct-00, to lugnet.robotics.rcx.legos)
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