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2fa8deb92d
Compilation still has problems (Thread error on success, and can't handle non-pde files in a sketch). Modified the Mac OS X make.sh to copy the hardware, avr tools, and example over. Removing some of the antlr stuff. Disabling the Commander (command-line execution) for now. Added Library, LibraryManager, and Target. Added support for prefixed preferences (e.g. for boards and programmers).
50 lines
1.1 KiB
Plaintext
50 lines
1.1 KiB
Plaintext
/*
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* Calibration
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*
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* Demonstrates one techinque for calibrating sensor input. The
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* sensor readings during the first five seconds of the sketch
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* execution define the minimum and maximum of expected values.
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*/
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int sensorPin = 2;
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int ledPin = 9;
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int val = 0;
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int sensorMin = 1023, sensorMax = 0;
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void setup() {
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// signal the start of the calibration period
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pinMode(13, OUTPUT);
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digitalWrite(13, HIGH);
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// calibrate during the first five seconds
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while (millis() < 5000) {
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val = analogRead(sensorPin);
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// record the maximum sensor value
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if (val > sensorMax) {
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sensorMax = val;
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}
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// record the minimum sensor value
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if (val < sensorMin) {
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sensorMin = val;
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}
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}
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// signal the end of the calibration period
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digitalWrite(13, LOW);
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}
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void loop() {
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val = analogRead(sensorPin);
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// apply the calibration to the sensor reading
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val = map(val, sensorMin, sensorMax, 0, 255);
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// in case the sensor value is outside the range seen during calibration
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val = constrain(val, 0, 255);
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analogWrite(ledPin, val);
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}
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