109 lines
2.4 KiB
C++
109 lines
2.4 KiB
C++
/*
|
|
*@author James McKenzie
|
|
*@lang C89 Based
|
|
*@contact lunarised@outlook.com
|
|
*/
|
|
int mode;
|
|
void setup() {
|
|
pinMode(6, INPUT_PULLUP); //Mode Select Pin
|
|
pinMode (13, OUTPUT); //LED Indicator Pin
|
|
pinMode(8, OUTPUT); //Speaker Pin
|
|
pinMode (7, INPUT_PULLUP); //Play Pin
|
|
pinMode(5, INPUT_PULLUP); //+Octave Play Pin
|
|
Serial.begin (9600); //Set up a Serial Connection
|
|
pinMode(11, OUTPUT); //Trigger pin
|
|
pinMode(12, INPUT); //Echo pin
|
|
|
|
}
|
|
|
|
void loop() {
|
|
if (digitalRead(6) ==HIGH){
|
|
mode = 0;
|
|
}else{
|
|
mode = 1;
|
|
}
|
|
float note = 0;
|
|
if (digitalRead(7) == LOW || digitalRead(5) == LOW){
|
|
if (mode == 0){
|
|
note = tune(getNote());
|
|
}
|
|
else{
|
|
note = getNote();
|
|
}
|
|
if (digitalRead(5)==LOW){ //if the octave button is pressed
|
|
note *= 2;
|
|
}
|
|
digitalWrite(13, HIGH);
|
|
Serial.print(note); //print frequency
|
|
Serial.println(" hz"); //print units after frequency
|
|
tone(8, note);
|
|
}
|
|
else{
|
|
noTone(8);
|
|
}
|
|
}
|
|
/*
|
|
* Method that uses an UltraSonic sensor to calculate a frequency
|
|
* @return A Frequency generated by a sensor
|
|
*/
|
|
float getNote(){
|
|
|
|
float echoTime;
|
|
float calculatedDistance;
|
|
digitalWrite(11, HIGH);
|
|
delayMicroseconds(20);
|
|
digitalWrite(11, LOW);
|
|
echoTime = pulseIn(12, HIGH);
|
|
calculatedDistance = echoTime / 8; //Change this value to decrease
|
|
//the playing physical range
|
|
calculatedDistance += 110; //Minimum value
|
|
if (calculatedDistance > 1760){ //Prevent high pitched sounds
|
|
calculatedDistance = 1760; //Maximum Value
|
|
}
|
|
return calculatedDistance;
|
|
}
|
|
|
|
/*
|
|
* Method which takes a note, and brings the note down to a correct pitch
|
|
* @param toTune The Note in which you are autotuning
|
|
* @return The Note that has now been autotuned
|
|
*/
|
|
float tune(float toTune){
|
|
if (toTune> 523.75){ //C5
|
|
return 523.75;
|
|
}
|
|
if (toTune> 493.88){ //B4
|
|
return 493.88;
|
|
}
|
|
if (toTune> 440){ //A4
|
|
return 440;
|
|
}
|
|
if (toTune> 392){ //G4
|
|
return 392;
|
|
}
|
|
if (toTune> 349.23){ //F4
|
|
return 349.23;
|
|
}
|
|
if (toTune> 329.63){ //E5
|
|
return 329.63;
|
|
}
|
|
if (toTune> 293.66){ //D4
|
|
return 293.66;
|
|
}
|
|
if (toTune> 261.63){ //C4
|
|
return 261.63;
|
|
}
|
|
if (toTune> 246.94){ //B3
|
|
return 246.94;
|
|
}
|
|
if (toTune> 220){ //A3
|
|
return 220;
|
|
}
|
|
if (toTune> 196){ //G3
|
|
return 196;
|
|
}
|
|
if (toTune> 174.61){ //F3
|
|
return 174.61;
|
|
}
|
|
}
|