Vishwa Iyer
/
MBED_Pinball_4180_final_project
Important changes to repositories hosted on mbed.com
Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.
To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.
It is also possible to export all your personal repositories from the account settings page.
SongPlayer.h@1:b3e26728357c, 2019-04-30 (annotated)
- Committer:
- vishiswoz
- Date:
- Tue Apr 30 03:31:51 2019 +0000
- Revision:
- 1:b3e26728357c
final project code published
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| vishiswoz | 1:b3e26728357c | 1 | #include "mbed.h" |
| vishiswoz | 1:b3e26728357c | 2 | // new class to play a note on Speaker based on PwmOut class |
| vishiswoz | 1:b3e26728357c | 3 | class SongPlayer |
| vishiswoz | 1:b3e26728357c | 4 | { |
| vishiswoz | 1:b3e26728357c | 5 | public: |
| vishiswoz | 1:b3e26728357c | 6 | SongPlayer(PinName pin) : _pin(pin) { |
| vishiswoz | 1:b3e26728357c | 7 | // _pin(pin) means pass pin to the constructor |
| vishiswoz | 1:b3e26728357c | 8 | } |
| vishiswoz | 1:b3e26728357c | 9 | // class method to play a note based on PwmOut class |
| vishiswoz | 1:b3e26728357c | 10 | void PlaySong(float frequency[], float duration[], float volume=1.0) { |
| vishiswoz | 1:b3e26728357c | 11 | vol = volume; |
| vishiswoz | 1:b3e26728357c | 12 | notecount = 0; |
| vishiswoz | 1:b3e26728357c | 13 | _pin.period(1.0/frequency[notecount]); |
| vishiswoz | 1:b3e26728357c | 14 | _pin = volume/2.0; |
| vishiswoz | 1:b3e26728357c | 15 | noteduration.attach(this,&SongPlayer::nextnote, duration[notecount]); |
| vishiswoz | 1:b3e26728357c | 16 | // setup timer to interrupt for next note to play |
| vishiswoz | 1:b3e26728357c | 17 | frequencyptr = frequency; |
| vishiswoz | 1:b3e26728357c | 18 | durationptr = duration; |
| vishiswoz | 1:b3e26728357c | 19 | //returns after first note starts to play |
| vishiswoz | 1:b3e26728357c | 20 | } |
| vishiswoz | 1:b3e26728357c | 21 | void nextnote(); |
| vishiswoz | 1:b3e26728357c | 22 | private: |
| vishiswoz | 1:b3e26728357c | 23 | Timeout noteduration; |
| vishiswoz | 1:b3e26728357c | 24 | PwmOut _pin; |
| vishiswoz | 1:b3e26728357c | 25 | int notecount; |
| vishiswoz | 1:b3e26728357c | 26 | float vol; |
| vishiswoz | 1:b3e26728357c | 27 | float * frequencyptr; |
| vishiswoz | 1:b3e26728357c | 28 | float * durationptr; |
| vishiswoz | 1:b3e26728357c | 29 | }; |
| vishiswoz | 1:b3e26728357c | 30 | //Interrupt Routine to play next note |
| vishiswoz | 1:b3e26728357c | 31 | void SongPlayer::nextnote() |
| vishiswoz | 1:b3e26728357c | 32 | { |
| vishiswoz | 1:b3e26728357c | 33 | _pin = 0.0; |
| vishiswoz | 1:b3e26728357c | 34 | notecount++; //setup next note in song |
| vishiswoz | 1:b3e26728357c | 35 | if (durationptr[notecount]!=0.0) { |
| vishiswoz | 1:b3e26728357c | 36 | _pin.period(1.0/frequencyptr[notecount]); |
| vishiswoz | 1:b3e26728357c | 37 | noteduration.attach(this,&SongPlayer::nextnote, durationptr[notecount]); |
| vishiswoz | 1:b3e26728357c | 38 | _pin = vol/2.0; |
| vishiswoz | 1:b3e26728357c | 39 | } else |
| vishiswoz | 1:b3e26728357c | 40 | _pin = 0.0; //turn off on last note |
| vishiswoz | 1:b3e26728357c | 41 | } |