![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
3872 Play-live--test code - tempting to make this the main one
SongPlayer.h
- Committer:
- chenchen2020
- Date:
- 2020-11-11
- Revision:
- 2:9296823ea33d
- Parent:
- 1:c704bea518d8
File content as of revision 2:9296823ea33d:
#include "mbed.h" // new class to play a note on Speaker based on PwmOut class class SongPlayer { public: SongPlayer(PinName pin) : _pin(pin) { // _pin(pin) means pass pin to the constructor } // class method to play a note based on PwmOut class void PlaySong(float frequency[], float duration[], float volume=1.0) { vol = volume; notecount = 0; _pin.period(1.0/frequency[notecount]); _pin = volume/2.0; noteduration.attach(this,&SongPlayer::nextnote, duration[notecount]); // setup timer to interrupt for next note to play frequencyptr = frequency; durationptr = duration; //returns after first note starts to play } void Play_Note(float frequency){ _pin.period(1.0/frequency); _pin = 1.0/2.0; } void nextnote(); private: Timeout noteduration; PwmOut _pin; int notecount; float vol; float * frequencyptr; float * durationptr; }; //Interrupt Routine to play next note void SongPlayer::nextnote() { _pin = 0.0; notecount++; //setup next note in song if (durationptr[notecount]!=0.0) { _pin.period(1.0/frequencyptr[notecount]); noteduration.attach(this,&SongPlayer::nextnote, durationptr[notecount]); _pin = vol/2.0; } else _pin = 0.0; //turn off on last note }