Jacob Smith / Mbed 2 deprecated IoT_V3

IoT for mbed1

Dependencies:   4DGL-uLCD-SE IoTsecuritySys PinDetect mbed-rtos mbed

Fork of IoT by Tal Landes

SongPlayer.h@9:413c094dd1e2, 2015-12-08 (annotated)

Committer:
jsmith352
Date:
Tue Dec 08 23:28:24 2015 +0000
Revision:
9:413c094dd1e2
Parent:
1:7f873efe5b11 
IoT for mbed1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
landes 1:7f873efe5b11 1 #include "mbed.h"
landes 1:7f873efe5b11 2 // new class to play a note on Speaker based on PwmOut class
landes 1:7f873efe5b11 3 class SongPlayer
landes 1:7f873efe5b11 4 {
landes 1:7f873efe5b11 5 public:
landes 1:7f873efe5b11 6 SongPlayer(PinName pin) : _pin(pin) {
landes 1:7f873efe5b11 7 // _pin(pin) means pass pin to the constructor
landes 1:7f873efe5b11 8 }
landes 1:7f873efe5b11 9 // class method to play a note based on PwmOut class
landes 1:7f873efe5b11 10 void PlaySong(float frequency[], float duration[], float volume=1.0) {
landes 1:7f873efe5b11 11 vol = volume;
landes 1:7f873efe5b11 12 notecount = 0;
landes 1:7f873efe5b11 13 _pin.period(1.0/frequency[notecount]);
landes 1:7f873efe5b11 14 _pin = volume/2.0;
landes 1:7f873efe5b11 15 noteduration.attach(this,&SongPlayer::nextnote, duration[notecount]);
landes 1:7f873efe5b11 16 // setup timer to interrupt for next note to play
landes 1:7f873efe5b11 17 frequencyptr = frequency;
landes 1:7f873efe5b11 18 durationptr = duration;
landes 1:7f873efe5b11 19 //returns after first note starts to play
landes 1:7f873efe5b11 20 }
landes 1:7f873efe5b11 21 void nextnote();
landes 1:7f873efe5b11 22 private:
landes 1:7f873efe5b11 23 Timeout noteduration;
landes 1:7f873efe5b11 24 PwmOut _pin;
landes 1:7f873efe5b11 25 int notecount;
landes 1:7f873efe5b11 26 float vol;
landes 1:7f873efe5b11 27 float * frequencyptr;
landes 1:7f873efe5b11 28 float * durationptr;
landes 1:7f873efe5b11 29 };
landes 1:7f873efe5b11 30 //Interrupt Routine to play next note
landes 1:7f873efe5b11 31 void SongPlayer::nextnote()
landes 1:7f873efe5b11 32 {
landes 1:7f873efe5b11 33 _pin = 0.0;
landes 1:7f873efe5b11 34 notecount++; //setup next note in song
landes 1:7f873efe5b11 35 if (durationptr[notecount]!=0.0) {
landes 1:7f873efe5b11 36 _pin.period(1.0/frequencyptr[notecount]);
landes 1:7f873efe5b11 37 noteduration.attach(this,&SongPlayer::nextnote, durationptr[notecount]);
landes 1:7f873efe5b11 38 _pin = vol/2.0;
landes 1:7f873efe5b11 39 } else
landes 1:7f873efe5b11 40 _pin = 0.0; //turn off on last note
landes 1:7f873efe5b11 41 }