Subject:
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Re: LOGO with Mindstorms
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 7 Jan 1999 23:55:53 GMT
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Original-From:
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Ralph M. Deal <deal@kzoo.eduIHATESPAM>
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Viewed:
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2349 times
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Hi, Simon Brooke & LOGO enthuasists:
> MIT have written BrickLOGO for the RCX; they are in discussion with LEGO
> inc about whether they can release it to mere mortals like us. As of
> mid-December this matter was still unresolved. The guy dealing with it
> at MIT is Mitchel Resnick, but please, guys, don't swamp him with mail;
> he knows we're interested and I'm already hassling him on a sort of
> monthly basis. I'll report to the list when anything's ready.
Good to hear - there had to be a link. Do let us know what you hear from
Mitchel Resnick.
The problem brought up in the thread earlier about the motors in the
MindStroms package are just DC motors, not servo motors, does make
executing LOGO commands awkward since quantitative responses are
expected. The suggested work arounds involving measuring how far a motor
has rotated and using that to control the final angle is workable but
would take up many of the very few sensory inputs for the RCX. Do you
know if the MIT brickLOGO is used to drive servomotors? Any chance of
LEGO making servo motor bricks? (would need some interface from the RCX).
> Note that to operate as a turtle the RCX does not have to run LOGO
> natively, merely respond to commands from a computer which does run
> LOGO; probably the best thing to do would be get UCB Logo and hack it to
> talk to the IR tower.
Wouldn't it be easier to write a LOGO interpreter in legOS?
> For a standard turtle, you would need messages for:
> pen [up|down]
> forward x
> backward x
> left x
> right x
It is that nasty x that is the problem...
> Probably best to package your message up into packets of bytes:
> [start-of-message RCX-being-addressed operator operand-1 ...
> operand-N end-of-message]
>
> Writing a handler for packets of this type would not be a major job, but
> a robot which could turn left and right by set numbers of degrees would
> of course require two rotation sensors.
Right.
> Finally, if you're interested in writing a LISP interpreter for the RCX,
> I'm planning to build a simple one (probably on top of legOS), and would
> be happy to colaborate.
neat idea but I'm far from that right now. I've got to add a new hard
disk to mount LINUX as well as the MindStorms standard software.
Thanks for the info! Ralph M. Deal deal@kzoo.edu
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
Message is in Reply To:
 | | Re: LOGO with Mindstorms
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| (...) [SNIP] (...) Sorry I didn't pick up this message earlier; I don't read this list every day, because of being busy, and traffic volumes, and... MIT have written BrickLOGO for the RCX; they are in discussion with LEGO inc about whether they can (...) (26 years ago, 7-Jan-99, to lugnet.robotics)
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