legOS : 218


Robotics / RCX / legOS / 218	217 \| 219

Subject:	Re: Lego Network Protocol questions
Newsgroups:	lugnet.robotics.rcx.legos, lugnet.robotics
Date:	Sun, 6 Jun 1999 02:48:29 GMT
Viewed:	2376 times

Kekoa Proudfoot <kekoa@pixel.Stanford.EDU> wrote: > I have implemented code to support this format for an unreleased version of > Librcx, and am of course willing to share source code. I am hoping that > other people will either use this format or point out its deficiencies so > the format can be fixed. I forgot to mention that one possible deficiency is the complements. They can be eliminated, for the most part, with careful counting of zeros. I haven't done any testing regarding this, so I don't know how many zeros in a row will break reception, but I suspect that it's possible to make things work by counting zeros and injecting an occasional FF into the stream if the ratio of zeros to ones gets too high. The only problem with doing this is that it complicates the choice of the header. -Kekoa

Message has 1 Reply:

		Re: Lego Network Protocol questions
(...) So of course I was curious about getting rid of the complements. Apparently, they are not necessary, or so my testing so far seems to indicate. Under the several lighting conditions I tried, and for distances of up to 27' (the farthest I could (...) (25 years ago, 6-Jun-99, to lugnet.robotics.rcx.legos, lugnet.robotics)

Message is in Reply To:

		Re: Lego Network Protocol questions
Regarding the IR protocol, I have elsewhere suggested the following simple low-level format: 1 start, 1 stop, 2400 baud, odd parity 55 f0 f0 L ~L D1 ~D1 .. Dn ~Dn C ~C L is number of data bytes, valid range 1..255, less depending on buffer sizes Dx (...) (25 years ago, 6-Jun-99, to lugnet.robotics.rcx.legos, lugnet.robotics)

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