Taeyong Shin / Mbed 2 deprecated alarmClock

Interactive Alarm Clock Code

Dependencies:   4DGL-uLCD-SE mbed

SongPlayer.h@0:68a3851de2ee, 2015-12-10 (annotated)

Committer:
tshin7
Date:
Thu Dec 10 08:59:55 2015 +0000
Revision:
0:68a3851de2ee
Alarm Clock

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tshin7 0:68a3851de2ee 1 #include "mbed.h"
tshin7 0:68a3851de2ee 2 // new class to play a note on Speaker based on PwmOut class
tshin7 0:68a3851de2ee 3 class SongPlayer
tshin7 0:68a3851de2ee 4 {
tshin7 0:68a3851de2ee 5 public:
tshin7 0:68a3851de2ee 6 SongPlayer(PinName pin) : _pin(pin) {
tshin7 0:68a3851de2ee 7 // _pin(pin) means pass pin to the constructor
tshin7 0:68a3851de2ee 8 }
tshin7 0:68a3851de2ee 9 // class method to play a note based on PwmOut class
tshin7 0:68a3851de2ee 10 void PlaySong(float frequency[], float duration[], float volume=1.0) {
tshin7 0:68a3851de2ee 11 vol = volume;
tshin7 0:68a3851de2ee 12 notecount = 0;
tshin7 0:68a3851de2ee 13 _pin.period(1.0/frequency[notecount]);
tshin7 0:68a3851de2ee 14 _pin = volume/2.0;
tshin7 0:68a3851de2ee 15 noteduration.attach(this,&SongPlayer::nextnote, duration[notecount]);
tshin7 0:68a3851de2ee 16 // setup timer to interrupt for next note to play
tshin7 0:68a3851de2ee 17 frequencyptr = frequency;
tshin7 0:68a3851de2ee 18 durationptr = duration;
tshin7 0:68a3851de2ee 19 //returns after first note starts to play
tshin7 0:68a3851de2ee 20 }
tshin7 0:68a3851de2ee 21 void nextnote();
tshin7 0:68a3851de2ee 22 private:
tshin7 0:68a3851de2ee 23 Timeout noteduration;
tshin7 0:68a3851de2ee 24 PwmOut _pin;
tshin7 0:68a3851de2ee 25 int notecount;
tshin7 0:68a3851de2ee 26 float vol;
tshin7 0:68a3851de2ee 27 float * frequencyptr;
tshin7 0:68a3851de2ee 28 float * durationptr;
tshin7 0:68a3851de2ee 29 };
tshin7 0:68a3851de2ee 30 //Interrupt Routine to play next note
tshin7 0:68a3851de2ee 31 void SongPlayer::nextnote()
tshin7 0:68a3851de2ee 32 {
tshin7 0:68a3851de2ee 33 _pin = 0.0;
tshin7 0:68a3851de2ee 34 notecount++; //setup next note in song
tshin7 0:68a3851de2ee 35 if (durationptr[notecount]!=0.0) {
tshin7 0:68a3851de2ee 36 _pin.period(1.0/frequencyptr[notecount]);
tshin7 0:68a3851de2ee 37 noteduration.attach(this,&SongPlayer::nextnote, durationptr[notecount]);
tshin7 0:68a3851de2ee 38 _pin = vol/2.0;
tshin7 0:68a3851de2ee 39 } else
tshin7 0:68a3851de2ee 40 _pin = 0.0; //turn off on last note
tshin7 0:68a3851de2ee 41 }