Subject:
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Re: PowerBook G3 IR Port?
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 28 Jan 2000 05:08:55 GMT
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Viewed:
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1143 times
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In article <v04210107b4b6549cdf89@[199.103.231.199]>, Ben Wyckoff
<wyckoff@clearway.com> wrote:
> Has anybody tried using the PB IR port? Can anybody tell me if I
> would be wasting my time to try?
In theory it may be possible, but in practice it hasn't been done. The
reason is that the PB uses IrDA (it also features a special Apple-only
protocol), while the RCX uses simple NRZ on a 38kHz carrier. In theory
you may be able to use one of the higher IrDA baud rates to manually
generate the 38kHz carrier for transmit, but this would require fairly
low level access to the IR hardware. Receive is an even bigger problem.
When you use the IrDA port as a substitute for a serial port you are
actually running several layers of protocol (IrCOM, TinyTP, IrLAP)
between the virtual serial interface seen by your program and the
physical Ir hardware. The RCX understands none of these protocols.
Dave
--
reply to: dbaum at enteract dot com
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Message has 1 Reply:
 | | Re: PowerBook G3 IR Port?
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| (...) Dave, Thanks for the response. Soon after I posted my question, I actually read page 18 of your book which told me the same thing ;) I'll just go get a cable, and tote my IRTower around with me! -Ben ---...--- Ben Wyckoff wyckoff@clearway.com (...) (25 years ago, 28-Jan-00, to lugnet.robotics)
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Message is in Reply To:
| | PowerBook G3 IR Port?
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| Hi all, I am new to this list. I was a beta tester for the Mindstorms kit, but sadly have not had much time to play with it. I just got two books, and have started researching on the web. I know I can hook up the IR tower to a Mac through some (...) (25 years ago, 27-Jan-00, to lugnet.robotics)
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