網上找了一段能控制蜂鳴器播放音樂的代碼 我想加個用按鍵控制 一按再開始播放音樂 不知道該怎么改這個程式
程式如下
int PIN_SPEAKER = 4;
int length = 25;
char notes[] = "ggagCbggagDCggGECbaffECDC";
int beats[] = {1,1,2,2,2,4, 1,1,2,2,2,4, 1,1,2,2,2,2,2, 1,1,2,2,2,4,1};
int tempo = 300;
void playTone(int tone, int duration) {
for (long i = 0; i < duration * 1000L; i += tone * 2) {
digitalWrite(PIN_SPEAKER, HIGH);
delayMicroseconds(tone);
digitalWrite(PIN_SPEAKER, LOW);
delayMicroseconds(tone);
}
}
void playNote(char note, int duration) {
char names[] = {'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C', 'D', 'E', 'F', 'G'};
int tones[] = {1915, 1700, 1519, 1432, 1275, 1136, 1014, 956, 853, 759, 716, 637, 568};
for (int i = 0; i < 12; i++) {
if (names[i] == note) {
Serial.print("value:");
Serial.println(note);
playTone(tones[i]*2, duration);
}
}
}
void setup() {
pinMode(PIN_SPEAKER, OUTPUT);
}
void loop() {
for (int i = 0; i < length; i++) {
if (notes[i] == ' ') {
delay(beats[i] * tempo);
} else {
playNote(notes[i], beats[i] * tempo);
}
delay(tempo / 2);
}
}
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標籤：單片機/工控