Emeril Huang / Mbed 2 deprecated Lab4-Reversi-v2

Final

Dependencies:   4DGL-uLCD-SE SDFileSystem mbed-rtos mbed wave_player

Fork of Lab4-Reversi-v2 by Timothy Li

SongPlayer.h@3:b1fe86f61f2f, 2016-11-01 (annotated)

Committer:
aolmenki
Date:
Tue Nov 01 23:30:44 2016 +0000
Revision:
3:b1fe86f61f2f
Parent:
1:cc72ad58982b 
Final

Who changed what in which revision?

UserRevisionLine numberNew contents of line
aolmenki 1:cc72ad58982b 1 #include "mbed.h"
aolmenki 1:cc72ad58982b 2 // new class to play a note on Speaker based on PwmOut class
aolmenki 1:cc72ad58982b 3 class SongPlayer
aolmenki 1:cc72ad58982b 4 {
aolmenki 1:cc72ad58982b 5 public:
aolmenki 1:cc72ad58982b 6 SongPlayer(PinName pin) : _pin(pin) {
aolmenki 1:cc72ad58982b 7 // _pin(pin) means pass pin to the constructor
aolmenki 1:cc72ad58982b 8 }
aolmenki 1:cc72ad58982b 9 // class method to play a note based on PwmOut class
aolmenki 1:cc72ad58982b 10 void PlaySong(float frequency[], float duration[], float volume=1.0) {
aolmenki 1:cc72ad58982b 11 vol = volume;
aolmenki 1:cc72ad58982b 12 notecount = 0;
aolmenki 1:cc72ad58982b 13 _pin.period(1.0/frequency[notecount]);
aolmenki 1:cc72ad58982b 14 _pin = volume/2.0;
aolmenki 1:cc72ad58982b 15 noteduration.attach(this,&SongPlayer::nextnote, duration[notecount]);
aolmenki 1:cc72ad58982b 16 // setup timer to interrupt for next note to play
aolmenki 1:cc72ad58982b 17 frequencyptr = frequency;
aolmenki 1:cc72ad58982b 18 durationptr = duration;
aolmenki 1:cc72ad58982b 19 //returns after first note starts to play
aolmenki 1:cc72ad58982b 20 }
aolmenki 1:cc72ad58982b 21 void nextnote();
aolmenki 1:cc72ad58982b 22 private:
aolmenki 1:cc72ad58982b 23 Timeout noteduration;
aolmenki 1:cc72ad58982b 24 PwmOut _pin;
aolmenki 1:cc72ad58982b 25 int notecount;
aolmenki 1:cc72ad58982b 26 float vol;
aolmenki 1:cc72ad58982b 27 float * frequencyptr;
aolmenki 1:cc72ad58982b 28 float * durationptr;
aolmenki 1:cc72ad58982b 29 };
aolmenki 1:cc72ad58982b 30 //Interrupt Routine to play next note
aolmenki 1:cc72ad58982b 31 void SongPlayer::nextnote()
aolmenki 1:cc72ad58982b 32 {
aolmenki 1:cc72ad58982b 33 _pin = 0.0;
aolmenki 1:cc72ad58982b 34 notecount++; //setup next note in song
aolmenki 1:cc72ad58982b 35 if (durationptr[notecount]!=0.0) {
aolmenki 1:cc72ad58982b 36 _pin.period(1.0/frequencyptr[notecount]);
aolmenki 1:cc72ad58982b 37 noteduration.attach(this,&SongPlayer::nextnote, durationptr[notecount]);
aolmenki 1:cc72ad58982b 38 _pin = vol/2.0;
aolmenki 1:cc72ad58982b 39 } else
aolmenki 1:cc72ad58982b 40 _pin = 0.0; //turn off on last note
aolmenki 1:cc72ad58982b 41 }