Subject:
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Re: Scout and External Iight sensor question
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Newsgroups:
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lugnet.robotics.scout
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Date:
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Sat, 20 Jan 2001 19:21:54 GMT
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Viewed:
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2477 times
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DJA wrote:
> Hi all,
>
> I read once that it is possible to use an external light sensor on on of the
> 2 available input ports on the SCOUT in RAW mode. I attempted to do this
> with SENSOR_1 in NQC with little success.
>
> Here is what I have tried.
>
> SetSensorType(SENSOR_1, SENSOR_LIGHT);
> SetSensorMode(SENSOR_1, SENSOR_MODE_RAW);
>
> On first try - got an error SENSOR_LIGHT variable undefined...
> Then I commented out the first line and hoped that by setting SENSOR_1 to
> RAW, the SCOUT could interpret the values correctly...
>
> I built a calibrate function that would calibrate the light values and play
> a sound based on the light value.
>
> Here is part of the code:
>
> i = 0;
> runningTotal = 0;
> while (i < 10)
> {
> runningTotal += SENSOR_1;
> Wait(50); // .5 sec
> i += 1;
> if (c == 0) // calibrate black
> {
> blackthresh = runningTotal / 10;
> PlayTone(blackthresh , 10
> }
> (note there may be { placement errors as some code has been clipped.)
>
> When the program runs it will loop through 10 iterations, sample the light
> and play a sound based on the light value. I get no sound... The variable
> blackthresh is evaluating to 0. So to verify that the PlayTone is working,
> I add 100 to blackthresh:
> PlayTone(whitethresh + 100, 10)
> This gives me a consistent sound for each of the 10 iterations of the light
> calibration procedure.. What I get from this is that the SCOUT is not
> reding the light sensor values in RAW.
>
> Any suggestions / ideas would be appreciated.
>
> Thx,
>
> Dave
Scout has a special command for RAW.
Sensor ValueRaw(n);
x = SensorValueRaw(0);
This is taken from page 28 of the NQC manual.
Hope that helps.
Dean
--
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Vancouver Lego Club: http://www.akasa.bc.ca/vlc
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Message is in Reply To:
 | | Scout and External Iight sensor question
|
| Hi all, I read once that it is possible to use an external light sensor on on of the 2 available input ports on the SCOUT in RAW mode. I attempted to do this with SENSOR_1 in NQC with little success. Here is what I have tried. (...) (24 years ago, 20-Jan-01, to lugnet.robotics.scout)
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