Chris Taylor / MusicEngine

Music Engine plays Music Macro Language compositions in the background

Dependents:   RETRO_BallsAndPaddle RETRO_BallAndHoles MusicBoxForFathersDay USBSec_mbed-os_dev

Music Engine is a simply library to execute Music Macro Language sequences asynchronously. Learn more about MML on wikipedia http://en.wikipedia.org/wiki/Music_Macro_Language

The following sample plays a simple tune

#include "mbed.h"
#include "MusicEngine.h"

// Play music on MCU Pin 0.18
// The pin should support PWM
MusicEngine music(P0_18);

main()
{
    music.play("T224L8O5CL16>C<P16GP16L8EL16P16>C<GP16L8E.L16P16L8C#L16>C#<P16G#P16L8FL16P16>C#<G#P16L8F.L16P16L8CL16>C<P16GP16L8EL16P16>C<GP16L8E.L16P16D#EFP16FF#GP16GG#AP16L8>C<P8L4>C");
    
    while(1)
    {
    }
}

Diff: MusicEngine.h

Revision:
0:d873d5d62d3b
Child:
1:7eb27d971c01
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MusicEngine.h	Thu Feb 05 04:18:39 2015 +0000
@@ -0,0 +1,76 @@
+///////////////////////////////////////////////////////////////////////////////
+// Retro  Music Engine
+// Author: Chris Taylor (taylorza)
+
+#include "mbed.h"
+
+#ifndef __MUSICENGINE_H__
+#define __MUSICENGINE_H__
+class MusicEngine
+{
+public:
+    MusicEngine(PinName pin);
+    
+    void play(char *mml);
+    void stop();
+        
+    bool getIsPlaying() { return _isPlaying; }
+    
+    void setCompletionCallback(void (*function)(void))
+    {
+        _completionCallback.attach(function);
+    }
+    
+    template<typename T>
+    void setCompletionCallback(T *object, void (T::*member)(void))
+    {
+        _completionCallback.attach(object, member);       
+    }
+
+private:
+    void executeCommand();
+    void skipWhiteSpace();
+    char getChar();
+    char peekChar();
+    void rewind();
+    int getNumber(int min, int max);
+    
+private:
+    PwmOut      _pwm;
+    bool        _isPlaying;
+    char        *_mml;
+    int         _mmlIndex;    
+    int         _octave;
+    float       _duration;
+    float       _durationRatio;
+    float       _pause;
+    int         _tempo;
+    Timeout     _scheduler;
+    
+    FunctionPointer _completionCallback;
+    
+    static const float PERIOD_TABLE[];
+    
+    static const float WHOLE_NOTE_DURATION;
+    static const float QUARTER_NOTE_DURATION;
+    static const float QUARTER_NOTES_PER_MINUTE;
+    
+    static const float DEFAULT_TIMING;
+    static const float LEGATO_TIMING;
+    static const float STACCATO_TIMING;
+    
+    static const int NOTE_REST;
+    static const int NOTE_C;
+    static const int NOTE_CS;
+    static const int NOTE_D;
+    static const int NOTE_DS;
+    static const int NOTE_E;
+    static const int NOTE_F;
+    static const int NOTE_FS;
+    static const int NOTE_G;
+    static const int NOTE_GS;
+    static const int NOTE_A;
+    static const int NOTE_AS;
+    static const int NOTE_B;
+};
+#endif //__MUSICENGINE_H__
\ No newline at end of file