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Hi, all,
We have an old Lego Dacta kit with SO many parts I hate to give it up. But we
need the interface cord between the card in our old Apple II GS and the black
power/controller box.
Any chance of finding/busying one?
Thanks,
Doug Clements
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In lugnet.robotics.rcx.java, Roger Glassey wrote:
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Hi Anders In lugnet.robotics.rcx.java, Anders Gaasedal wrote:
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My problem is the communication speed from the PC to RCX, it takes about 0.5
sec before the IR tower sends the message (1 byte) to the RCX. I use the
lejos software and the pcrcxcomm.jar and I use the RCXF7PORT for
communication.
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I could not repeat your experiment exactly because I don’t have a joy stick.
So instead I wrote a pair of programs that send single byte messages between
the PC and the RCX. The RCX adds 1 to the incoming byte and immediately send
it back. The PC then echoes it back to the RCX. I am using the LeJos
RCXF7Port, InputStream and OutputStream. I count about 4.2 round trip
messages per second. The PC side code sends the first byte in response to a
mouse click. The delay between the mouse click and the tower light coming on
is too short to observe. The light then appears to stay on continuously.
Perhaps the delay you are seeing is not in the communications, but somewhere
else in your code? Good luck, Roger
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Hi Roger,
Thank you for your help, it is a bit strange that you dont see any problems,
since it is the same protocols we are using. I dont think the joystick is the
problem since I have the same problem with inputs from keyboard or mouse, but I
will try to review my code again, and see if I can find any bugs. I would be
very glad if you will send your example to my email.
Thanks, Anders
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Hi Anders In lugnet.robotics.rcx.java, Anders Gaasedal wrote:
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My problem is the communication speed from the PC to RCX, it takes about 0.5
sec before the IR tower sends the message (1 byte) to the RCX. I use the
lejos software and the pcrcxcomm.jar and I use the RCXF7PORT for
communication.
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I could not repeat your experiment exactly because I don’t have a joy stick. So
instead I wrote a pair of programs that send single byte messages between the PC
and the RCX. The RCX adds 1 to the incoming byte and immediately send it back.
The PC then echoes it back to the RCX. I am using the LeJos RCXF7Port,
InputStream and OutputStream. I count about 4.2 round trip messages per second.
The PC side code sends the first byte in response to a mouse click. The delay
between the mouse click and the tower light coming on is too short to observe.
The light then appears to stay on continuously. Perhaps the delay you are
seeing is not in the communications, but somewhere else in your code? Good luck,
Roger
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Hi everyone,
Im working on a project with controlling a large Container Crane by 4 RCXs.
I have implementet some controlling and a lot of functions in the model,
including a userinterface made in Java for a laptop. The crane is controlled by
a Joystick through the PC.
My problem is the communication speed from the PC to RCX, it takes about 0.5 sec
before the IR tower sends the message (1 byte) to the RCX. I use the lejos
software and the pcrcxcomm.jar and I use the RCXF7PORT for communication.
Are there any other method I can use which do not includes 0.5 waiting time, or
do you know how to get around the problem?
Please visit my homepage to see the project, I have put a lot of pictures in
there. http://www.gaasedal.dk
Thank you for your help.
Best regards
Anders Gaasedal
LEGO Mobile Cranes
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We have a bunch of kids in our school who have been
having a great time building stuff with two old
LEGO Dacta (PC Controlled, wired) set of parts. Many of
them are 1st to 3rd grade, and usually don't get to
do our Mindstorms LEGO projects yet. But it's a great
introduction, and it's been very popular, and mostly
self-guided.
We could use some MORE of this older stuff! Anyone have
some of these old sets in the closet?
We can maybe trade some other parts, electronics parts, etc.
We also have a complete IBM Personal Science Laboratory
setup with temperature and distance sensors we might trade.
I'd like to see more kids with their hands on this stuff...
--
Regards, Terry King ...In The Woods In Vermont
tking@waitsriver.k12.vt.us
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