Lai-Kuei Hsueh / Mbed 2 deprecated Eathquake_Detector

4180 mini project

Dependencies:   LSM9DS1_Library_cal SDFileSystem mbed wave_player

Fork of HUZZAHESP8266-web-control-LPC1768 by Austin Dong

SongPlayer.h@6:9244b4b7485c, 2017-03-14 (annotated)

Committer:
mikebenq
Date:
Tue Mar 14 01:03:15 2017 +0000
Revision:
6:9244b4b7485c
ECE4180 project

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mikebenq 6:9244b4b7485c 1 #include "mbed.h"
mikebenq 6:9244b4b7485c 2 // new class to play a note on Speaker based on PwmOut class
mikebenq 6:9244b4b7485c 3 class SongPlayer
mikebenq 6:9244b4b7485c 4 {
mikebenq 6:9244b4b7485c 5 public:
mikebenq 6:9244b4b7485c 6 SongPlayer(PinName pin) : _pin(pin) {
mikebenq 6:9244b4b7485c 7 // _pin(pin) means pass pin to the constructor
mikebenq 6:9244b4b7485c 8 }
mikebenq 6:9244b4b7485c 9 // class method to play a note based on PwmOut class
mikebenq 6:9244b4b7485c 10 void PlaySong(float frequency[], float duration[], float volume=1.0) {
mikebenq 6:9244b4b7485c 11 vol = volume;
mikebenq 6:9244b4b7485c 12 notecount = 0;
mikebenq 6:9244b4b7485c 13 _pin.period(1.0/frequency[notecount]);
mikebenq 6:9244b4b7485c 14 _pin = volume/2.0;
mikebenq 6:9244b4b7485c 15 noteduration.attach(this,&SongPlayer::nextnote, duration[notecount]);
mikebenq 6:9244b4b7485c 16 // setup timer to interrupt for next note to play
mikebenq 6:9244b4b7485c 17 frequencyptr = frequency;
mikebenq 6:9244b4b7485c 18 durationptr = duration;
mikebenq 6:9244b4b7485c 19 //returns after first note starts to play
mikebenq 6:9244b4b7485c 20 }
mikebenq 6:9244b4b7485c 21 void nextnote();
mikebenq 6:9244b4b7485c 22 private:
mikebenq 6:9244b4b7485c 23 Timeout noteduration;
mikebenq 6:9244b4b7485c 24 PwmOut _pin;
mikebenq 6:9244b4b7485c 25 int notecount;
mikebenq 6:9244b4b7485c 26 float vol;
mikebenq 6:9244b4b7485c 27 float * frequencyptr;
mikebenq 6:9244b4b7485c 28 float * durationptr;
mikebenq 6:9244b4b7485c 29 };
mikebenq 6:9244b4b7485c 30 //Interrupt Routine to play next note
mikebenq 6:9244b4b7485c 31 void SongPlayer::nextnote()
mikebenq 6:9244b4b7485c 32 {
mikebenq 6:9244b4b7485c 33 _pin = 0.0;
mikebenq 6:9244b4b7485c 34 notecount++; //setup next note in song
mikebenq 6:9244b4b7485c 35 if (durationptr[notecount]!=0.0) {
mikebenq 6:9244b4b7485c 36 _pin.period(1.0/frequencyptr[notecount]);
mikebenq 6:9244b4b7485c 37 noteduration.attach(this,&SongPlayer::nextnote, durationptr[notecount]);
mikebenq 6:9244b4b7485c 38 _pin = vol/2.0;
mikebenq 6:9244b4b7485c 39 } else
mikebenq 6:9244b4b7485c 40 _pin = 0.0; //turn off on last note
mikebenq 6:9244b4b7485c 41 }