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48 lines
1.3 KiB
C++

/*
*
* Envelope Generator (ADSR)
*
* A3 = trigger (sync) in
*
*/
int pwmPin = 11; //define output pin, Meergranen output pin is 11
bool triggered; // logic: triggered, yes or no
void setup() {
pinMode(pwmPin, OUTPUT); //set pin as output
Serial.begin(9600); // debugging (see if trigger is registered)
}
void loop() { // run forever
int input3 = digitalRead(A3); // read analog pin 3, detect triggers
if(input3 && !triggered) {
Serial.println("trigger!");
//ATTACK
for(int value = 0; value<=255; value++){ // cycle through 255 values, start at 0. 8 bit output == 255 values
analogWrite(pwmPin, value); // analogWrite simulates smooth sinewave using complex pwm duty cycles
//DELAY
delay(1);
}
//SUSTAIN
for(int value = 255; value>=0; value--){ // cycle through 255 values, start at 0. 8 bit output == 255 values
analogWrite(pwmPin, value); // analogWrite simulates smooth sinewave using complex pwm duty cycles
delay(2);
}
//RELEASE
delay(20);
triggered = true;
}
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
// STOP WHEN NO TRIGGER IS PRESENT (or do something else ;)
triggered = false;
}
}