Music.h

00001 /* * * * * * * * * * * * * * * * * * * * * * * * * * *
00002  * This is a simple music library for the mbed.      *
00003  *                                                   *
00004  * Created by: Michael Dushkoff (mad1841@rit.edu)    *
00005  * * * * * * * * * * * * * * * * * * * * * * * * * * */
00006 
00007 #ifndef MBED_MUSIC_H
00008 #define MBED_MUSIC_H
00009  
00010 #include "mbed.h"
00011 #include "Notes.h"
00012 
00013 /* Define the music_note structure */
00014 typedef struct {
00015     double freq;  //The frequency of the note
00016     int duration; //The duration is given by a number [1 - 64]
00017 } music_note;
00018 
00019 /* Define an m_song structure */
00020 typedef struct {
00021     music_note* note; //The notes of the song
00022     int len;           //The length of the song
00023 } m_song;
00024 
00025 class music {
00026 public:
00027 
00028     music(PinName M0); //basic music constructor
00029     music(PinName M0, double freq); //music constructor
00030     void freq(double freq);  //Frequency setter
00031     void play(char* song, double tempo, int num);
00032     
00033 private:
00034 
00035     /* Private functions */
00036     void flip();  //Flips the output of a pin at a fixed frequency
00037     m_song parse(char* song, int num_notes);  //Parses a character array into notes
00038     void init_song(m_song *m, int num);  //Initialize an m_song
00039     void dal_song(m_song *m);  //Deallocate an m_song
00040     
00041     /* Private variables */
00042     Ticker _flipper;
00043     DigitalOut _M0;
00044     double _freq;
00045     
00046 };
00047 
00048 #endif