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- #include <LiquidCrystal.h>
- LiquidCrystal lcd(4,6,10,11,12,13);
- int Piezo = 5;
- int length = 32;
- char notes[] = "gefgg gabCC efggagff egcedffccc gefgg gabCC efggagff egcedffcce";
- int beats[] = {2,1,1,2,3,.5,1,1,1,2,3.5,1,1,1,2,2,1,1,1,4,2,2,2,2,1,2,2,4,2.5,.5,1,1,2,3,.5,1,1,1,2,3.5,1,1,1,2,2,1,1,1,4,2,2,2,2,2,3,2.5,4};
- int tempo = 250;
- void playTone(int tone, int duration) {
- for (long i = 0; i < duration * 1000L; i += tone * 2) {
- digitalWrite(Piezo, HIGH);
- delayMicroseconds(tone);
- digitalWrite(Piezo, LOW);
- delayMicroseconds(tone);
- }
- }
- void playNote(char note, int duration) {
- char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C','B'};
- int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956, 27.5};
- // play the tone corresponding to the note name
- for (int i = 0; i < 8; i++) {
- if (names[i] == note) {
- playTone(tones[i], duration);
- }
- }
- }
- void setup() {
- pinMode(Piezo, OUTPUT);
- lcd.begin (16,2);
- }
- void loop() {
- for (int i = 0; i < length; i++) {
- if (notes[i] == ' ')
- {
- delay(beats[i] * tempo); // rest
- } else {
- playNote(notes[i], beats[i] * tempo);
- }
- // pause between notes
- delay(tempo / 310);
- }
- lcd.clear();
- for (int i = 0; i<16; i++)
- {
- lcd.setCursor(i,0);
- lcd.print ("Merry christmas");
- delay (200);
- lcd.clear();
- }
- }
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