Subject:
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Re: Controlling Multiple RCX's from one PC
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Newsgroups:
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lugnet.robotics.rcx.java
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Date:
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Wed, 10 Jul 2002 18:01:31 GMT
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Viewed:
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4460 times
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Lawrie Griffiths has majorly reworked the RCX communications support in
leJOS. His architecture allows you to define protocol stacks that sit on top
of a basic transport mechanism. He has implemented support for the LNP stack
used in legos - which provides addressing as part of the protocol (in other
words you can send message to a specific address).
This will be released as part of the next lejos release along with many
other big improvements.
Naturally I don't know exactly when that will be, but I think we are talking
weeks rather than months (unless we find any major problems).
I know that he was planning on commiting his changes to the main branch late
this week, so if any of you are up for building your own release, you could
do so!
In lugnet.robotics.rcx.java, Laurence K.W. Yip writes:
> Hi, Roger and Jonathan!!
>
> I'd like to get your code too as I'm also interested to do the same thing as
> Jonathan.
> Would you mind also sending your source code about controlling multiple mindstorms
> using one PC to me? I'd like to have more exchange with yours in the future about
> this context!
>
> Thanks in advance!
>
> Laurence
>
> Roger Glassey wrote:
>
> > In lugnet.robotics.rcx.java, Jonathan Dallas writes:
> > > I'm working on a project that requires four RCX's to be controlled by one
> > > laptop. The program on the laptop is written in Java and the program on the
> > > RCXs is written in lejos. I'm using RCXPort to establish a connection
> > > between them.
> > >
> > > The problem I'm running into is that if I have more than one RCX running in
> > > front of the same tower, it causes an exception and then prevents the laptop
> > > from sending the data to the RCX.
> > >
> > > Has anyone found a way around this?
> >
> > Hi Jonathan,
> > I send messages from the PC to 3 RCX's with no problem, but I use the Tower
> > object running on my PC, and Serial in the RCX. I don't use Stream objects
> > because they actually only send one byte at a time and not yet very reliable.
> >
> > The trick in using the send(byte[] b, int n)method in Tower is to set the
> > correct value in b[0] before you send it.
> > To send a packet containing 1 data byte (packet length 2) use
> > packet[0]= 0xf7;
> > Example:
> >
> > byte[] packet = {0xf7,0x08};
> > tower.send(packet,2);
> >
> > will send the message containing the data byte 0x08 to every RCX within range
> >
> > A packet containing 5 data bytes (length 6) can use 0x05 as packet[0]
> >
> > If you wish, I can send you my source code.
> > Good luck,
> > Roger
> > glassey@ieor.berkeley.edu
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Message is in Reply To:
 | | Re: Controlling Multiple RCX's from one PC
|
| Hi, Roger and Jonathan!! I'd like to get your code too as I'm also interested to do the same thing as Jonathan. Would you mind also sending your source code about controlling multiple mindstorms using one PC to me? I'd like to have more exchange (...) (22 years ago, 8-Jul-02, to lugnet.robotics.rcx.java)
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