Elecia White / Mbed 2 deprecated FistfulOfWires

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Dependencies:   PixelArray mbed

SongPlayer.h@0:21fea82c85fc, 2016-05-15 (annotated)

Committer:
Elecia
Date:
Sun May 15 18:06:06 2016 +0000
Revision:
0:21fea82c85fc
Blinking works, colors work. No speaker yet.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Elecia 0:21fea82c85fc 1 #include "mbed.h"
Elecia 0:21fea82c85fc 2 // new class to play a note on Speaker based on PwmOut class
Elecia 0:21fea82c85fc 3 // https://developer.mbed.org/users/4180_1/notebook/using-a-speaker-for-audio-output/
Elecia 0:21fea82c85fc 4 class SongPlayer
Elecia 0:21fea82c85fc 5 {
Elecia 0:21fea82c85fc 6 public:
Elecia 0:21fea82c85fc 7 SongPlayer(PinName pin) : _pin(pin) {
Elecia 0:21fea82c85fc 8 // _pin(pin) means pass pin to the constructor
Elecia 0:21fea82c85fc 9 }
Elecia 0:21fea82c85fc 10 // class method to play a note based on PwmOut class
Elecia 0:21fea82c85fc 11 void PlaySong(float frequency[], float duration[], float volume=1.0) {
Elecia 0:21fea82c85fc 12 vol = volume;
Elecia 0:21fea82c85fc 13 notecount = 0;
Elecia 0:21fea82c85fc 14 _pin.period(1.0/frequency[notecount]);
Elecia 0:21fea82c85fc 15 _pin = volume/2.0;
Elecia 0:21fea82c85fc 16 noteduration.attach(this,&SongPlayer::nextnote, duration[notecount]);
Elecia 0:21fea82c85fc 17 // setup timer to interrupt for next note to play
Elecia 0:21fea82c85fc 18 frequencyptr = frequency;
Elecia 0:21fea82c85fc 19 durationptr = duration;
Elecia 0:21fea82c85fc 20 //returns after first note starts to play
Elecia 0:21fea82c85fc 21 }
Elecia 0:21fea82c85fc 22 void nextnote();
Elecia 0:21fea82c85fc 23 private:
Elecia 0:21fea82c85fc 24 Timeout noteduration;
Elecia 0:21fea82c85fc 25 PwmOut _pin;
Elecia 0:21fea82c85fc 26 int notecount;
Elecia 0:21fea82c85fc 27 float vol;
Elecia 0:21fea82c85fc 28 float * frequencyptr;
Elecia 0:21fea82c85fc 29 float * durationptr;
Elecia 0:21fea82c85fc 30 };
Elecia 0:21fea82c85fc 31 //Interrupt Routine to play next note
Elecia 0:21fea82c85fc 32 void SongPlayer::nextnote()
Elecia 0:21fea82c85fc 33 {
Elecia 0:21fea82c85fc 34 _pin = 0.0;
Elecia 0:21fea82c85fc 35 notecount++; //setup next note in song
Elecia 0:21fea82c85fc 36 if (durationptr[notecount]!=0.0) {
Elecia 0:21fea82c85fc 37 _pin.period(1.0/frequencyptr[notecount]);
Elecia 0:21fea82c85fc 38 noteduration.attach(this,&SongPlayer::nextnote, durationptr[notecount]);
Elecia 0:21fea82c85fc 39 _pin = vol/2.0;
Elecia 0:21fea82c85fc 40 } else
Elecia 0:21fea82c85fc 41 _pin = 0.0; //turn off on last note
Elecia 0:21fea82c85fc 42 }