play songs
Dependencies: mbed
main.cpp
- Committer:
- maclobdell
- Date:
- 2016-05-16
- Revision:
- 4:02dc2ab8eabb
- Parent:
- 3:c04186a77ede
- Child:
- 5:7003c9f6d633
File content as of revision 4:02dc2ab8eabb:
#include "mbed.h" // this tells us to load mbed related functions #include "tones.h" // list of all the tones and their frequencies PwmOut buzzer(D3); // our buzzer is a PWM output (pulse-width modulation) static int BPM = 120; static void silence() { buzzer.write(0.0f); // silence! } // this is our function that plays a tone. // Takes in a tone frequency, and after duration (in ms.) we stop playing again static void play_tone(int tone) { buzzer.period_us(1000000/(tone)); buzzer.write(0.10f); // 10% duty cycle, otherwise it's too loud } static void play_song(int notes_left, int* melody, int* duration) { // YOUR CODE HERE } // this code runs when the microcontroller starts up int main() { // declare a melody int melody[] = { NOTE_G4, NOTE_G4, NOTE_G4, NOTE_DS3, NOTE_AS4, NOTE_G4, NOTE_DS3, NOTE_AS4, NOTE_G4, NOTE_D4, NOTE_D4, NOTE_D4, NOTE_DS4, NOTE_AS4, NOTE_FS4, NOTE_DS4, NOTE_AS4, NOTE_G4 }; // note durations: 4 = quarter note, 8 = eighth note, etc.: int duration[] = { 2, 2, 2, 4, 4, 2, 4, 4, 1, 2, 2, 2, 4, 4, 2, 4, 4, 1 }; // melody & duration are on the heap, need to get them on the stack int *m = new int[sizeof(melody) / sizeof(int)]; memcpy(m, melody, sizeof(melody)); int *d = new int[sizeof(duration) / sizeof(int)]; memcpy(d, duration, sizeof(duration)); if (sizeof(melody) != sizeof(duration)) { printf("Melody and duration do not have same number of elements! Aborting!\r\n"); return 1; } play_song(sizeof(melody) / sizeof(int), m, d); return 0; }