Subject:
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Re: Co-operative Multi tasking in pbforth 2.1
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Newsgroups:
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lugnet.robotics.rcx.pbforth
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Date:
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Fri, 3 May 2002 23:27:35 GMT
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Viewed:
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2557 times
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Hi Ralph
Thanks for you reply.
I have just started into the article on background monitoring, its great.
I am looking forward to your articles on hooking into the one millisecond
timer and use of using John Barnes' ultrasonic sensor.
I was going to build up an "IR RADAR" using the bricks' IR transmitter and
the LEGO light sensor as a receiver.
IN THEORY..... the transmitter would provide say 110 degree coverage in
front of the brick. The Light sensor would be shrouded to be directional
and then rotated through the arc of coverage detecting any reflected IR.
The RADAR task was to be run as a separate task to provide "terain warning"
along with Driving the brick collecting information from two touch sensors
and building a terain map.
I am paticularly interested in the ultrasonic sensor as this would be a
better form of "RARAR" well closer to "Active SONAR" actually.
The project is in its very early days yet, I need more rainy weekends.
Thanks again for your effort.
haveagoodone
phil
In lugnet.robotics.rcx.pbforth, Ralph Hempel writes:
> Phil,
>
> I have some hooks in the current version of pbForth that
> you can use to implement cooperative multi-tasking.
>
> Have you read the article on implementing a background monitor
> to check for button presses? It's at:
>
> <http://www.hempeldesigngroup.com/lego/pbForth/scripts/howtoRCXMonitor1.html>
>
> I was going to write another article this weekend on using John Barnes'
> ultrasonic sensor (great bit of engineering) and then another
> one on hooking into the 1msec timer hook I have in pbForth.
>
> I'm kinda busy right now at work (who isn't) but requests like
> this make it more likely that I'll actually get the article done.
>
> Can you give us more info on what kind of sensor you
> want to use and why you actually need multi-tasking?
>
> Cheers, Ralph
>
> --------------------------------------------------------------------
> Check out pbFORTH for LEGO Mindstorms at:
> <http://www.hempeldesigngroup.com/lego/pbForth>
>
> Buy "Extreme Mindstorms: an Advanced Guide to Lego Mindstorms"
> <http://www.amazon.com/exec/obidos/ASIN/1893115844/hempeldesigngrou>
> --------------------------------------------------------------------
> Reply to: rhempel at bmts dot com
> --------------------------------------------------------------------
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