Subject:
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RE: expansion board - servo control
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 21 Dec 1998 21:57:31 GMT
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Original-From:
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brett anthony <ANTHONYB@ECS.CSUS.EDUantispam>
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Viewed:
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1349 times
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-----Original Message-----
From: shsc9801@condor.stcloudstate.edu
[mailto:shsc9801@condor.stcloudstate.edu]
Sent: Monday, December 21, 1998 1:39 PM
To: handyboard@media.mit.edu
Subject: expansion board - servo control
Hi,
I stopped working with the handyboard for a while but just started back up
again. I put the expansion board onto my handyboard and began testing it.
After testing the general tests done before with just the handyboard I
started testing the servo ports.
I am having some trouble with controlling the ports though. When I enter
init_expbd_servos(int action); from the computer via IC, the motor turns
completely clockwise. It does not matter what my integer is as long as it
is not zero. I am not sure what the action variable should be in any case.
I also am unable to change the direction of the servo no matter what action
value is given or what value I give servo0, the port that the motor is
plugged into.
Can anyone give me any suggestions as to how to control the servo?
Thanks,
Scott Sherman
shsc9801@condor.stcloudstate.edu
ACS
SCSU
AhHa!
The expansion board lives! I hope that now we all have winter break we'll
start to hear from the other beta testers again.
I know I've been slacking due to other commitments and an unrelated comm
problem with my HB, but I'm anxious to get with it again as soon as I finish
my ^#&@( shopping.
Anyhoo, though I left it home (I'm at work, and didn't want the temptation)
I'll try to help from my somewhat rusty memory of my servo experiments:
1. The servo control function does not load by default, make sure you load
it.
2. Not all servo pinouts match the Futaba standard used on the board; I had
to swap leads on my Airtronics servos.
Hope this helps!
Brett Anthony
Equipment Technician
College of Engineering and Computer Science
California State University, Sacramento
Postal Mail: Brett Anthony
CSUS, E&CS
6000 J St.
Sacramento, CA 95819-6023
email: anthonyb@ecs.csus.edu
phone: (916)278-6253
fax: (916)278-5949
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