/* Play Melody * ----------- * * Program to play melodies stored in an array, it requires to know * about timing issues and about how to play tones. * * The calculation of the tones is made following the mathematical * operation: * * timeHigh = 1/(2 * toneFrequency) = period / 2 * * where the different tones are described as in the table: * * note frequency period PW (timeHigh) * c 261 Hz 3830 1915 * d 294 Hz 3400 1700 * e 329 Hz 3038 1519 * f 349 Hz 2864 1432 * g 392 Hz 2550 1275 * a 440 Hz 2272 1136 * b 493 Hz 2028 1014 * C 523 Hz 1912 956 * * (cleft) 2005 D. Cuartielles for K3 */ int ledPin = 13; int speakerOut = 7; byte names[] = {'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C'}; int tones[] = {1915, 1700, 1519, 1432, 1275, 1136, 1014, 956}; byte melody[] = "2d2a1f2c2d2a2d2c2f2d2a2c2d2a1f2c2d2a2a2g2p8p8p8p"; // count length: 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 // 10 20 30 int count = 0; int count2 = 0; int count3 = 0; int MAX_COUNT = 24; int statePin = LOW; void setup() { pinMode(ledPin, OUTPUT); pinMode(speakerOut, OUTPUT); } void loop() { digitalWrite(speakerOut, LOW); for (count = 0; count < MAX_COUNT; count++) { statePin = !statePin; digitalWrite(ledPin, statePin); for (count3 = 0; count3 <= (melody[count*2] - 48) * 30; count3++) { for (count2=0;count2<8;count2++) { if (names[count2] == melody[count*2 + 1]) { digitalWrite(speakerOut,HIGH); delayMicroseconds(tones[count2]); digitalWrite(speakerOut, LOW); delayMicroseconds(tones[count2]); } if (melody[count*2 + 1] == 'p') { // make a pause of a certain size digitalWrite(speakerOut, 0); delayMicroseconds(500); } } } } }