Subject:
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Re: Brainstorms
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 13 Aug 2002 16:04:28 GMT
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Original-From:
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Till Harbaum <HARBAUM@TM.UKA.saynotospamDE>
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Reply-To:
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HARBAUM@TM.UKAspamcake.DE
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Viewed:
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1110 times
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Hi,
On Tuesday 13 August 2002 17:52, you wrote:
> Since I had to support hot-pluggable devices on the bus (not my idea), I
Weird idea ...
> ago and I don't remember all of the details. It took either a zero-length
> read or a zero-length write followed by a check to see if the clock line
It's way simpler: You just send the address and wait for the acknowledged via
the data line. Then you just don't continue ... you don't even need read
access to the clock line for this.
IMHO something that can carry power, gnd and commands via two lines at all is
a better idea and works with the current kind of wiring used by lego. I once
was working with something like that, but i forgot the name ...
Ciao,
Till
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Message has 1 Reply:
 | | Re: Brainstorms
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| (...) [snip hot pluggable] (...) That is only a partial bus scan. It does not tell you what is at each address. A full bus scan allows people to plug arbitrary devices into the bus and allows the bus master to to reliably figure out what has been (...) (22 years ago, 13-Aug-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: Brainstorms
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| (...) Since I had to support hot-pluggable devices on the bus (not my idea), I had to continually scan the bus. Unfortunately, that was several years ago and I don't remember all of the details. It took either a zero-length read or a zero-length (...) (22 years ago, 13-Aug-02, to lugnet.robotics)
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