Subject:
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Re: Communicatin between NQC and legOS
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Sat, 23 Sep 2000 06:26:05 GMT
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Viewed:
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1474 times
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In article <G16wrp.Au0@lugnet.com>, "Rainer Balzerowski"
<Balze2@gmx.net> wrote:
> Hi folks,
>
> is it possible to communicate between two RCX, one running NQC, one
> running
> legOS ?
>
> I have to solve this problem for using a RCX programmed with legOS and
> the
> Vision Command camera.
> The vision command camera software requires an "alive-message" via IR
> from the
> RCX at least every 5 seconds.
> This works fine with NQC [SendMessage(x)] but does not work with legOS
> [lnp_integrity_write(test,1)].
>
> Where are the differences between this to functions ?
> Is there a frame around the transmitted data using NQC ?
> If so what does it look like ?
The protocol used by the standard firmware (which is what NQC relies on)
is described on these sites:
http://graphics.stanford.edu/~kekoa/rcx/
http://www.crynwr.com/lego-robotics/
the opcode of interest is F7 (thats what gets sent as a transmitted
message). The entire packet would look like this:
55 ff 00 f7 08 x ~x s ~s
where x is the message you want to send
~x is the one's complement of x
s is the checksum (f7 + x)
~s is the one's complement of the checksum
For example, sending message 1:
55 ff 00 f7 08 01 fe f8 07
Dave
p.s. You can also spy on nqc to figure out the packet. Tell nqc to
send the message, and enable verbose mode:
nqc -v -msg 1
--
reply to: dbaum at enteract dot com
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Message has 1 Reply:
Message is in Reply To:
 | | Communicatin between NQC and legOS
|
| Hi folks, is it possible to communicate between two RCX, one running NQC, one running legOS ? I have to solve this problem for using a RCX programmed with legOS and the Vision Command camera. The vision command camera software requires an (...) (24 years ago, 20-Sep-00, to lugnet.robotics.rcx)
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