Jinghan Yu / Mbed 2 deprecated Synthetic

its a test

Dependencies:   mbed HC_SR04_Ultrasonic_Library

SongPlayer.h@0:c019b7e987f6, 2019-05-18 (annotated)

Committer:
JinghanYu
Date:
Sat May 18 17:12:42 2019 +0000
Revision:
0:c019b7e987f6
it's a test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JinghanYu 0:c019b7e987f6 1 #include "mbed.h"
JinghanYu 0:c019b7e987f6 2 // new class to play a note on Speaker based on PwmOut class
JinghanYu 0:c019b7e987f6 3 class SongPlayer
JinghanYu 0:c019b7e987f6 4 {
JinghanYu 0:c019b7e987f6 5 public:
JinghanYu 0:c019b7e987f6 6 SongPlayer(PinName pin) : _pin(pin) {
JinghanYu 0:c019b7e987f6 7 // _pin(pin) means pass pin to the constructor
JinghanYu 0:c019b7e987f6 8 }
JinghanYu 0:c019b7e987f6 9 // class method to play a note based on PwmOut class
JinghanYu 0:c019b7e987f6 10 void PlaySong(float frequency[], float duration[], float volume=1.0) {
JinghanYu 0:c019b7e987f6 11 vol = volume;
JinghanYu 0:c019b7e987f6 12 notecount = 0;
JinghanYu 0:c019b7e987f6 13 _pin.period(1.0/frequency[notecount]);
JinghanYu 0:c019b7e987f6 14 _pin = volume/2.0;
JinghanYu 0:c019b7e987f6 15 noteduration.attach(this,&SongPlayer::nextnote, duration[notecount]);
JinghanYu 0:c019b7e987f6 16 // setup timer to interrupt for next note to play
JinghanYu 0:c019b7e987f6 17 frequencyptr = frequency;
JinghanYu 0:c019b7e987f6 18 durationptr = duration;
JinghanYu 0:c019b7e987f6 19 //returns after first note starts to play
JinghanYu 0:c019b7e987f6 20 }
JinghanYu 0:c019b7e987f6 21 void nextnote();
JinghanYu 0:c019b7e987f6 22 private:
JinghanYu 0:c019b7e987f6 23 Timeout noteduration;
JinghanYu 0:c019b7e987f6 24 PwmOut _pin;
JinghanYu 0:c019b7e987f6 25 int notecount;
JinghanYu 0:c019b7e987f6 26 float vol;
JinghanYu 0:c019b7e987f6 27 float * frequencyptr;
JinghanYu 0:c019b7e987f6 28 float * durationptr;
JinghanYu 0:c019b7e987f6 29 };
JinghanYu 0:c019b7e987f6 30 //Interrupt Routine to play next note
JinghanYu 0:c019b7e987f6 31 void SongPlayer::nextnote()
JinghanYu 0:c019b7e987f6 32 {
JinghanYu 0:c019b7e987f6 33 _pin = 0.0;
JinghanYu 0:c019b7e987f6 34 notecount++; //setup next note in song
JinghanYu 0:c019b7e987f6 35 if (durationptr[notecount]!=0.0) {
JinghanYu 0:c019b7e987f6 36 _pin.period(1.0/frequencyptr[notecount]);
JinghanYu 0:c019b7e987f6 37 noteduration.attach(this,&SongPlayer::nextnote, durationptr[notecount]);
JinghanYu 0:c019b7e987f6 38 _pin = vol/2.0;
JinghanYu 0:c019b7e987f6 39 } else
JinghanYu 0:c019b7e987f6 40 _pin = 0.0; //turn off on last note
JinghanYu 0:c019b7e987f6 41 }