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noTone()
Descrição
Interrompe a geração de uma onda quadrada iniciada pela função tone(). Não tem nenhum efeito se nenhum tom está sendo gerado.
Sintaxe
noTone(pino)
Parâmetros
- pino: o pino do Arduino no qual se quer parar de gerar um tom.
Retorna
Nada
Código de Exemplo
Let's to play "Jingle Bells" song with Arduino.
Hardware Required
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Wiring Diagram
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Arduino Code
/*
* Created by ArduinoGetStarted.com
*
* This example code is in the public domain
*
* Tutorial page: https://arduinogetstarted.com/pt/reference/notone
*/
#include "pitches.h"
#define BUZZER_PIN 8 // The Arduino pin connected to the buzzer
// notes in the melody:
int melody[] = {
NOTE_E5, NOTE_E5, NOTE_E5,
NOTE_E5, NOTE_E5, NOTE_E5,
NOTE_E5, NOTE_G5, NOTE_C5, NOTE_D5,
NOTE_E5,
NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5,
NOTE_F5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5,
NOTE_E5, NOTE_D5, NOTE_D5, NOTE_E5,
NOTE_D5, NOTE_G5
};
// note durations: 4 = quarter note, 8 = eighth note, etc, also called tempo:
int noteDurations[] = {
8, 8, 4,
8, 8, 4,
8, 8, 8, 8,
2,
8, 8, 8, 8,
8, 8, 8, 16, 16,
8, 8, 8, 8,
4, 4
};
void setup() {
// iterate over the notes of the melody:
int size = sizeof(noteDurations) / sizeof(int);
for (int thisNote = 0; thisNote < size; thisNote++) {
// to calculate the note duration, take one second divided by the note type.
//e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
int noteDuration = 1000 / noteDurations[thisNote];
tone(BUZZER_PIN, melody[thisNote], noteDuration);
// to distinguish the notes, set a minimum time between them.
// the note's duration + 30% seems to work well:
int pauseBetweenNotes = noteDuration * 1.30;
delay(pauseBetweenNotes);
// stop the tone playing:
noTone(BUZZER_PIN);
}
}
void loop() {
// no need to repeat the melody.
}
For more detailed instruction, see Arduino - Piezo Buzzer
※ Notas e Advertências:
Se você quiser tocar tons diferentes em múltiplos pinos, você precisa chamar noTone() em um pino antes de chamar tone() no próximo pino.
Ver Também
- Linguagem : pulseIn()
- Linguagem : pulseInLong()
- Linguagem : shiftIn()
- Linguagem : shiftOut()
- Linguagem : tone()
- Exemplo : Arduino - Piezo Buzzer
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