08-Teclado Musical com gravação

Material Utilizado:

01 Placa Arduino Uno
01 Protoboard
09 resistores de 220Ω
09 chaves tácteis
08 Leds
Jumpers
01 Buzzer

Código:

// Teclado musical

//EduArduino

#define SPK 13

#define PLAYBACK_BTN 12

#define BUFFERSIZE 160

int keys[] = {2,3,4,5,6,7,8,9,10,11,A4,A5};

int tones[] = {2638,2349,2093,1976,1760,1568,1397,1319,1175,1047,988,880}; // melhor tom

//int tones[] = {1047,1175,1319,1397,1568,1760,1976,2093};

char names[] = { 'a','b','c', 'd', 'e', 'f', 'g', 'a', 'b', 'C','D','E' };

//int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };

int length = sizeof keys/sizeof *keys;

// for recording

int count = 0;

int recorder[BUFFERSIZE];

unsigned long interval[BUFFERSIZE];

unsigned long pauseInterval[BUFFERSIZE];

void setup() {

pinMode(SPK,OUTPUT);

pinMode(PLAYBACK_BTN,INPUT);

for(int i=0; i<length; i++){

pinMode(keys[i],INPUT);

}

void loop() {

unsigned long startTime;

static unsigned long pauseTime;

static int playback_btn=0;

int lastState = LOW;

// prevent buffer overflow

if(count>=BUFFERSIZE) count=0;

// playback button

if(digitalRead(PLAYBACK_BTN)==HIGH){

playback();

playback_btn=1;

}

// for each keyboard key

for(int i=0; i<length; i++){

//startTime = micros();

startTime = millis();

while(digitalRead(keys[i])==HIGH){

if(playback_btn){

// reset count after playback

playback_btn = 0;

count=0;

}

recorder[count]=i;

tone(SPK,tones[i]);

delay(5); // debounce

lastState=HIGH;

}

if(lastState==HIGH){

lastState=LOW;

noTone(SPK);

interval[count]=millis()-startTime;

if(count)

pauseInterval[count-1]=millis()-pauseTime;

pauseTime=millis();

count++;

}

void playback(){

int index, key;

for(int i=0; i<length; i++){

pinMode(keys[i],OUTPUT);

}

for(int i=0; i<count; i++){

index = recorder[i];

key = keys[index];

digitalWrite(key,HIGH);

tone(SPK,tones[index]);

delay(interval[i]);

digitalWrite(key,LOW);

noTone(SPK);

delay(pauseInterval[i]);

}

for(int i=0; i<length; i++){

pinMode(keys[i],INPUT);

}