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2fa8deb92d
Compilation still has problems (Thread error on success, and can't handle non-pde files in a sketch). Modified the Mac OS X make.sh to copy the hardware, avr tools, and example over. Removing some of the antlr stuff. Disabling the Commander (command-line execution) for now. Added Library, LibraryManager, and Target. Added support for prefixed preferences (e.g. for boards and programmers).
72 lines
1.9 KiB
Plaintext
72 lines
1.9 KiB
Plaintext
/* Melody
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* (cleft) 2005 D. Cuartielles for K3
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*
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* This example uses a piezo speaker to play melodies. It sends
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* a square wave of the appropriate frequency to the piezo, generating
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* the corresponding tone.
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*
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* The calculation of the tones is made following the mathematical
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* operation:
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*
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* timeHigh = period / 2 = 1 / (2 * toneFrequency)
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*
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* where the different tones are described as in the table:
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*
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* note frequency period timeHigh
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* c 261 Hz 3830 1915
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* d 294 Hz 3400 1700
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* e 329 Hz 3038 1519
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* f 349 Hz 2864 1432
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* g 392 Hz 2550 1275
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* a 440 Hz 2272 1136
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* b 493 Hz 2028 1014
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* C 523 Hz 1912 956
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*
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* http://www.arduino.cc/en/Tutorial/Melody
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*/
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int speakerPin = 9;
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int length = 15; // the number of notes
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char notes[] = "ccggaagffeeddc "; // a space represents a rest
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int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };
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int tempo = 300;
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void playTone(int tone, int duration) {
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for (long i = 0; i < duration * 1000L; i += tone * 2) {
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digitalWrite(speakerPin, HIGH);
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delayMicroseconds(tone);
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digitalWrite(speakerPin, LOW);
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delayMicroseconds(tone);
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}
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}
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void playNote(char note, int duration) {
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char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
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int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };
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// play the tone corresponding to the note name
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for (int i = 0; i < 8; i++) {
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if (names[i] == note) {
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playTone(tones[i], duration);
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}
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}
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}
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void setup() {
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pinMode(speakerPin, OUTPUT);
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}
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void loop() {
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for (int i = 0; i < length; i++) {
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if (notes[i] == ' ') {
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delay(beats[i] * tempo); // rest
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} else {
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playNote(notes[i], beats[i] * tempo);
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}
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// pause between notes
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delay(tempo / 2);
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}
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}
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