Subject:
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Re: BrickOS motor port horrors
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Sun, 26 Oct 2003 20:15:29 GMT
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Viewed:
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3642 times
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In lugnet.robotics.rcx.legos, Rob Stehlik wrote:
> I was writing some simple programs to test out BrickOS last night, and had some
> really strange behavior. I hooked up a motor to port B and a rotation sensor to
> port 2. My programs were just testing out various motor speeds and positioning
> accuracy. The problem was, the motor made some awful grinding noises. It was
> almost as if it was toggling between forward and reverse rapidly. I haven't
> experimented with low speeds in BrickOS before, so I thought maybe it was
> normal. But once I stopped the program, the motor kept going. Kind of freaky.
> Then I shut of the RCX, turned it on again, and the motor started grinding
> again. Really freaky. The I hooked up the motor to the other ports to see if
> anything was wrong with them. Port A seemed fine, while port C was powered as
> well. Instead of a low grinding noise, it produced a high pitched whine. But the
> motor still ran even after the RCX was turned off and then on again. So... I
> erased the firmware by removing the batteries, and then reloaded BrickOS
> 0.2.6.10. Without even downloading a program to the RCX, motor ports B and C
> behaved the same as before. To make sure the problem was not a hrdware issue, I
> erased the firmware again, and loaded the standard Lego frimware, and the motor
> ports behaved themselves.
>
> Any idea what might have gone wrong? Is my RCX possessed?
> Rob
Rob, I've had the same problem with BrickOS. The installation I used came with
BrickOS already built.
I reloaded the RCX with LEGO firmware and all three motor ports worked fine. I
concluded it was a BrickOS problem that I would wrestle with when I wanted more
than one motor.
Kevin
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Message has 1 Reply:
 | | Re: BrickOS motor port horrors
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| (...) Me too. Without any program loaded, it seems to do funny things with the motors. But once I get a program downloaded, it works fine. The only thing that I find freaky is the different values for light sensors. There's hex percentages and dec (...) (21 years ago, 27-Oct-03, to lugnet.robotics.rcx.legos, FTX)
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Message is in Reply To:
| | BrickOS motor port horrors
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| I was writing some simple programs to test out BrickOS last night, and had some really strange behavior. I hooked up a motor to port B and a rotation sensor to port 2. My programs were just testing out various motor speeds and positioning accuracy. (...) (21 years ago, 25-Oct-03, to lugnet.robotics.rcx.legos)
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