Subject:
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Re: The Datalog
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Newsgroups:
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lugnet.robotics.rcx.nqc
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Date:
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Tue, 10 Oct 2000 08:55:03 GMT
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Viewed:
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2187 times
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Sorry, Dean - now I got your point. There is indeed no way to read the contents
of the datalog. What about storing the data (e.g. for path information, maps,
etc.) into an ARRAY instead of the datalog? With RIS2.0 and the latest NQC
version you have this feature.
The sad thing is that the dimension of an array and the number of all global
variables is less equal 32.
However, I experimented a bit with a trace-back algorithm and could pack
(shifting, masking and "oring") several data into one "word" stored then in
array [i]. But this is admittedly only a poor approach.
By the way, why don't we suggest Lego to implement a READ DATALOG command?
I don't know where to send this proposal. Up to now, none of my mails with
problems, suggestions or questions I sent to Lego have ever been answered ...
In lugnet.robotics.rcx.nqc, Dean Husby writes:
> Bernd Frassek wrote:
>
> > To my mind, the datalog is a good feature, since it helps with debugging or
> > adjusting sensors. I found very useful for analyzing light sensor values,
> > measured during movements (e.g. proximity detection).
> > Another useful application was measuring the temperatures of my heating • system
> > and the real temperatures at home over a period of 24 hours. So I could see
> > when there were actual heating periods and how the effects were for the true
> > temperature in the living room. As a result of this I could optimize the
> > control of the heating system.
>
> Please don't get any of us wrong, the DataLog is a WONDERFUL feature. It makes • for
> the greatest use of the brick as a data gatherer... The ONLY gripe any of us • have
> is that the RCX it's self cannot read back the DataLog... If we could we could
> make programs that could remember their paths and return. Could build maps in
> their brains about the environment and react with it...
>
> I'm hoping that one day this will be possible...
>
> 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 2 Replies:
 | | Re: The Datalog
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| (...) Lego has made it quite clear that they will not listen to us. They say that it pollutes their vision or something. All we can do is hope that the few people they do ask for feedback will point out these 'lacking' points. But, since version 2.0 (...) (24 years ago, 10-Oct-00, to lugnet.robotics.rcx.nqc)
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Message is in Reply To:
| | Re: The Datalog
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| (...) Please don't get any of us wrong, the DataLog is a WONDERFUL feature. It makes for the greatest use of the brick as a data gatherer... The ONLY gripe any of us have is that the RCX it's self cannot read back the DataLog... If we could we could (...) (24 years ago, 9-Oct-00, to lugnet.robotics.rcx.nqc)
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