Subject:
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Re: Rotation Sensor Values
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Mon, 24 Jul 2000 13:59:12 GMT
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Viewed:
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1713 times
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On Mon, 24 Jul 2000, Andy Gombos wrote:
> I was reading about rotation sensors for legOS for a new robot, and
> thought I'd try it out. So, I made a simple program that would show
> rotation sensor values on the display. What I got was not what I
> expected. I have never used the rotation sensors in legOS before, so I
> do not know if this behavior was expected. Anyway, I got values of
> 9999, -9999, 64, and -64 (more that once). I think that these values
> correspond to the RAW values that I got from switchinf quadrants in
> the sensor. Are these the expected values, or are you supposed to get
> 0,1,2, -5,2, like in the regular lego firmware?
Andy-
Have you set up the rotation sensors correctly? You need to do a few
things before you get reasonable values for the rotation sensor.
1) use ds_active(&SENSOR_1) to turn on the sensor.
2) use ds_rotation_on(&SENSOR_1) to turn on the rotation processing in the
kernel.
3) use ds_rotation_set(&SENSOR_1, int X) to set the sensor to X. I believe
that the default for this is undefined, so unless you use rotation set at
least once, you could easily get an undefined value > 9999 or < -9999.
Once you've done all that, what you should see is just a counter, noting
the number of sixteenths of rotations that have occurred. (i.e., when the
counter reads 16, one rotation will have occurred.)
Hope that helps- please let us know if you still have problems-
Luis
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"Summertime... and the living is easy...
fish are jumping and the cotton is high...
So hush, little baby, baby don't you cry."
-Ella
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Message has 1 Reply:
 | | Re: Rotation Sensor Values
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| Well, I do not know if I have to have code to display the values. I do not get anything on screen when I run this code. If I put a loop, and with every loop, the sensor value is being displayed, then I get the values mentioned before. I run the (...) (24 years ago, 24-Jul-00, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Rotation Sensor Values
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| I was reading about rotation sensors for legOS for a new robot, and thought I'd try it out. So, I made a simple program that would show rotation sensor values on the display. What I got was not what I expected. I have never used the rotation sensors (...) (24 years ago, 24-Jul-00, to lugnet.robotics.rcx.legos)
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