ECE3872 HW/SW Project Code
Dependencies: mbed Servo mbed-rtos 4DGL-uLCD-SE PinDetect X_NUCLEO_53L0A1
SongPlayer.h@25:7764baddb7bc, 2020-04-13 (annotated)
- Committer:
- trmontgomery
- Date:
- Mon Apr 13 21:32:00 2020 +0000
- Revision:
- 25:7764baddb7bc
- Child:
- 26:2063ee8419cc
trying to make a servo move back and forth. tried to use SongPlayer class to control servos.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
trmontgomery | 25:7764baddb7bc | 1 | #include "mbed.h" |
trmontgomery | 25:7764baddb7bc | 2 | // new class to play a note on Speaker based on PwmOut class |
trmontgomery | 25:7764baddb7bc | 3 | class SongPlayer |
trmontgomery | 25:7764baddb7bc | 4 | { |
trmontgomery | 25:7764baddb7bc | 5 | public: |
trmontgomery | 25:7764baddb7bc | 6 | SongPlayer(PinName pin) : _pin(pin) { |
trmontgomery | 25:7764baddb7bc | 7 | // _pin(pin) means pass pin to the constructor |
trmontgomery | 25:7764baddb7bc | 8 | } |
trmontgomery | 25:7764baddb7bc | 9 | // class method to play a note based on PwmOut class |
trmontgomery | 25:7764baddb7bc | 10 | void PlaySong(float frequency[], float duration[], float volume=1.0) { |
trmontgomery | 25:7764baddb7bc | 11 | vol = volume; |
trmontgomery | 25:7764baddb7bc | 12 | notecount = 0; |
trmontgomery | 25:7764baddb7bc | 13 | _pin.period(1.0/frequency[notecount]); |
trmontgomery | 25:7764baddb7bc | 14 | _pin = volume/2.0; |
trmontgomery | 25:7764baddb7bc | 15 | noteduration.attach(this,&SongPlayer::nextnote, duration[notecount]); |
trmontgomery | 25:7764baddb7bc | 16 | // setup timer to interrupt for next note to play |
trmontgomery | 25:7764baddb7bc | 17 | frequencyptr = frequency; |
trmontgomery | 25:7764baddb7bc | 18 | durationptr = duration; |
trmontgomery | 25:7764baddb7bc | 19 | //returns after first note starts to play |
trmontgomery | 25:7764baddb7bc | 20 | } |
trmontgomery | 25:7764baddb7bc | 21 | void nextnote(); |
trmontgomery | 25:7764baddb7bc | 22 | private: |
trmontgomery | 25:7764baddb7bc | 23 | Timeout noteduration; |
trmontgomery | 25:7764baddb7bc | 24 | PwmOut _pin; |
trmontgomery | 25:7764baddb7bc | 25 | int notecount; |
trmontgomery | 25:7764baddb7bc | 26 | float vol; |
trmontgomery | 25:7764baddb7bc | 27 | float * frequencyptr; |
trmontgomery | 25:7764baddb7bc | 28 | float * durationptr; |
trmontgomery | 25:7764baddb7bc | 29 | }; |
trmontgomery | 25:7764baddb7bc | 30 | //Interrupt Routine to play next note |
trmontgomery | 25:7764baddb7bc | 31 | void SongPlayer::nextnote() |
trmontgomery | 25:7764baddb7bc | 32 | { |
trmontgomery | 25:7764baddb7bc | 33 | _pin = 0.0; |
trmontgomery | 25:7764baddb7bc | 34 | notecount++; //setup next note in song |
trmontgomery | 25:7764baddb7bc | 35 | if (durationptr[notecount]!=0.0) { |
trmontgomery | 25:7764baddb7bc | 36 | _pin.period(1.0/frequencyptr[notecount]); |
trmontgomery | 25:7764baddb7bc | 37 | noteduration.attach(this,&SongPlayer::nextnote, durationptr[notecount]); |
trmontgomery | 25:7764baddb7bc | 38 | _pin = vol/2.0; |
trmontgomery | 25:7764baddb7bc | 39 | } else |
trmontgomery | 25:7764baddb7bc | 40 | _pin = 0.0; //turn off on last note |
trmontgomery | 25:7764baddb7bc | 41 | } |