58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
/*
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Analog input, analog output, serial output
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Reads an analog input pin, maps the result to a range from 0 to
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65535 and uses the result to set the pulse width modulation (PWM) of
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an output pin. Also prints the results to the serial monitor.
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(You may need to change the pin numbers analogInPin and analogOutPin
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if you're not using a Maple).
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The circuit:
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* Potentiometer connected to analog pin 15.
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Center pin of the potentiometer goes to the analog pin.
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Side pins of the potentiometer go to +3.3V and ground.
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* LED connected from digital pin 9 to ground
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created 29 Dec. 2008
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by Tom Igoe
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ported to Maple
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by LeafLabs
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*/
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// These constants won't change. They're used to give names
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// to the pins used:
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const int analogInPin = 15; // Analog input pin that the potentiometer
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// is attached to
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const int pwmOutPin = 9; // PWM pin that the LED is attached to
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// These variables will change:
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int sensorValue = 0; // value read from the pot
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int outputValue = 0; // value output to the PWM
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void setup() {
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// Configure the ADC pin
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pinMode(analogInPin, INPUT_ANALOG);
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// Configure LED pin
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pinMode(pwmOutPin, PWM);
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Serial.begin(115200); // Ignored by Maple. But needed by boards using Hardware serial via a USB to Serial Adaptor
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}
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void loop() {
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// read the analog in value:
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sensorValue = analogRead(analogInPin);
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// map it to the range of the analog out:
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outputValue = map(sensorValue, 0, 1023, 0, 65535);
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// change the analog out value:
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pwmWrite(pwmOutPin, outputValue);
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// print the results to the serial monitor:
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Serial.print("sensor = " );
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Serial.print(sensorValue);
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Serial.print("\t output = ");
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Serial.println(outputValue);
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}
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