ece4180_team / Mbed 2 deprecated lab3part5_Bluetooth

bluetooth

Dependencies:   4DGL-uLCD-SE SDFileSystem_3 mbed-rtos mbed wave_player

SongPlayer.h@3:0bc0b28da20d, 21 months ago (annotated)

Committer:
mus3
Date:
Thu Oct 13 19:01:17 2022 +0000
Revision:
3:0bc0b28da20d
Parent:
0:f531454e4dce 
lab3part5 bluetooth parts

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mus3 0:f531454e4dce 1 #include "mbed.h"
mus3 0:f531454e4dce 2 // new class to play a note on Speaker based on PwmOut class
mus3 0:f531454e4dce 3 class SongPlayer
mus3 0:f531454e4dce 4 {
mus3 0:f531454e4dce 5 public:
mus3 0:f531454e4dce 6 SongPlayer(PinName pin) : _pin(pin) {
mus3 0:f531454e4dce 7 // _pin(pin) means pass pin to the constructor
mus3 0:f531454e4dce 8 }
mus3 0:f531454e4dce 9 // class method to play a note based on PwmOut class
mus3 0:f531454e4dce 10 void PlaySong(float frequency[], float duration[], float volume=1.0) {
mus3 0:f531454e4dce 11 vol = volume;
mus3 0:f531454e4dce 12 notecount = 0;
mus3 0:f531454e4dce 13 _pin.period(1.0/frequency[notecount]);
mus3 0:f531454e4dce 14 _pin = volume/2.0;
mus3 0:f531454e4dce 15 noteduration.attach(this,&SongPlayer::nextnote, duration[notecount]);
mus3 0:f531454e4dce 16 // setup timer to interrupt for next note to play
mus3 0:f531454e4dce 17 frequencyptr = frequency;
mus3 0:f531454e4dce 18 durationptr = duration;
mus3 0:f531454e4dce 19 //returns after first note starts to play
mus3 0:f531454e4dce 20 }
mus3 0:f531454e4dce 21 void nextnote();
mus3 0:f531454e4dce 22 private:
mus3 0:f531454e4dce 23 Timeout noteduration;
mus3 0:f531454e4dce 24 PwmOut _pin;
mus3 0:f531454e4dce 25 int notecount;
mus3 0:f531454e4dce 26 float vol;
mus3 0:f531454e4dce 27 float * frequencyptr;
mus3 0:f531454e4dce 28 float * durationptr;
mus3 0:f531454e4dce 29 };
mus3 0:f531454e4dce 30 //Interrupt Routine to play next note
mus3 0:f531454e4dce 31 void SongPlayer::nextnote()
mus3 0:f531454e4dce 32 {
mus3 0:f531454e4dce 33 _pin = 0.0;
mus3 0:f531454e4dce 34 notecount++; //setup next note in song
mus3 0:f531454e4dce 35 if (durationptr[notecount]!=0.0) {
mus3 0:f531454e4dce 36 _pin.period(1.0/frequencyptr[notecount]);
mus3 0:f531454e4dce 37 noteduration.attach(this,&SongPlayer::nextnote, durationptr[notecount]);
mus3 0:f531454e4dce 38 _pin = vol/2.0;
mus3 0:f531454e4dce 39 } else
mus3 0:f531454e4dce 40 _pin = 0.0; //turn off on last note
mus3 0:f531454e4dce 41 }