Subject:
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Re: IR communication
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 19 Apr 2000 18:48:57 GMT
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Original-From:
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Jose Solorzano <j.h.solorzano@worldnet*spamless*.att.net>
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Viewed:
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711 times
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-----Original Message-----
From: Colin Ryan <colin.ryan@cs.tcd.ie>
To: lego-robotics@crynwr.com <lego-robotics@crynwr.com>
Date: Wednesday, April 19, 2000 5:27 PM
Subject: RE: IR communication
> Hi
>
> I read a mail a few weeks back about a minimum JVM
> implementation for the RCX. I am doing some reearch
> into CORBA for Embedded Systems and was wondering if
> anyone has any thoughts / exposure as to the RCX's
> suitability ....
>
> Colin
I'm sure it's doable but it would take quite a bit
of work. You would probably require a special
IDL compiler to create stubs and skels that
use the IR communication routines. Another way
to do it is to implement a socket layer. My brother
was talking about implementing sockets
for TinyVM (http://www.crazyrobots.com/tinyvmsite),
but I believe he lost interest.
To be honest, Java is not necessarily the best choice
for the implementation of CORBA. You might be able
to do it on top of legOS (though it may not be as fun).
Now, if we were talking about RMI and/or Jini, that's
a different story. Many Java enthusiasts would probably
tell you to forget about CORBA and implement Jini.
(I'm not too familiar with Jini technology yet).
In any case, any of these frameworks that would allow
you to install long-running servers in the RCX will require
some features to be added to TinyVM: garbage collection, strings, etc.
If anyone is interested in starting such projects, let
me know.
Regards,
--Jose
> -----Original Message-----
> From: news-gateway@lugnet.com [mailto:news-gateway@lugnet.com]On Behalf
> Of Dean Husby
> Sent: 19 April 2000 17:28
> To: lego-robotics@crynwr.com
> Subject: Re: IR communication
>
>
> Daniele Pongan wrote:
>
> > Hi
> >
> > I'm working at a method to transmit to a RCX that is not directly
> > aligned with the IR-tower (say that the little robot with the RCX
> > mounted on it can be anywhere in the range of 2-3 meters from the
> > IR-transmitter).
> > I want to use only IR communication, no radio or cable or anything else.
> >
> > Has anyone already found a good solution to it?
> > Is it possible to use something to reflect IR-light?
> >
> > Thanx in advance
> > Daniele
>
> On LOW power I've found the RCX hardly reads any signals at all. You must • be
> very close to the tower/other RCX to read it. (V Cool) On HIGH though I can
> bounce the signal down the hall and it still reaches my bot.
>
> I'm only using the RCX codes though 1-255
>
> Dean
> --
> Coin-Op's For Sale!: http://www.akasa.bc.ca/tfm/coin-op.html
> Dean's Lego Workshop: http://www.akasa.bc.ca/tfm/lego_wr.html
> Vancouver Lego Club: http://www.akasa.bc.ca/vlc
>
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Message has 1 Reply:
 | | RE: CORBA and MindStorms
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| Hi, I should probably have clarified. I'm not intending on using Java to implement a CORBA ORB, I think that would be way too costly, I was thinking at a more granular level of coding. Probably NQC and/or assembly. I know JINI interfaces exist, but (...) (25 years ago, 20-Apr-00, to lugnet.robotics)
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