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49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
/*
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*
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* Simple (PWM) Oscillator with Trigger
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*
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* A2 = pitch
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* A1 = note duration
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* A3 = trigger in
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*
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*
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*/
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bool triggered; // logic: trigered, yes or no
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#define SPEAKER_PIN 11
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int noteDuration = 100;
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void setup() {
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// set pin 11 as output
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pinMode(SPEAKER_PIN, OUTPUT);
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Serial.begin(9600); // debugging (see if trigger is registered)
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}
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void loop() {
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int input3 = digitalRead(A3); // read analog pin 3 (trigger)
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int noteDuration = analogRead(A1)/10; // read analog pin 1 (note duration)
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// trigger
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if(input3 && !triggered) {
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Serial.println("I hear a trigger!");
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Serial.println(noteDuration);
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for(int i=0;i<noteDuration;i++){
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digitalWrite( SPEAKER_PIN, LOW );
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delayMicroseconds( analogRead(A2)*10); // wait
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digitalWrite( SPEAKER_PIN, HIGH );
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delayMicroseconds( analogRead(A2)*10 ); // wait
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triggered = true;
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delay(1); //playtime of the osc note: this numer * noteDuration milliseconds
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}
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}
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else if(!input3 && triggered) { //if there is no reading on input3 and condition triggered is true (aka sound is playing), set triggered to false, aka stop playing
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// STOP WHEN NO TRIGGER IS PRESENT (or do something else ;)
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triggered = false;
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}
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}
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