CHEE CHENG LIM
/
chumbaka
chumbaka
Speaker/Speaker.h@0:1df60be3424b, 2014-10-01 (annotated)
- Committer:
- limcheecheng
- Date:
- Wed Oct 01 08:54:54 2014 +0000
- Revision:
- 0:1df60be3424b
Commit
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
limcheecheng | 0:1df60be3424b | 1 | #include "mbed.h" |
limcheecheng | 0:1df60be3424b | 2 | // new class to play a note on Speaker based on PwmOut class |
limcheecheng | 0:1df60be3424b | 3 | class Speaker |
limcheecheng | 0:1df60be3424b | 4 | { |
limcheecheng | 0:1df60be3424b | 5 | public: |
limcheecheng | 0:1df60be3424b | 6 | Speaker(PinName pin) : _pin(pin) { |
limcheecheng | 0:1df60be3424b | 7 | // _pin(pin) means pass pin to the Speaker Constructor |
limcheecheng | 0:1df60be3424b | 8 | } |
limcheecheng | 0:1df60be3424b | 9 | // class method to play a note based on PwmOut class |
limcheecheng | 0:1df60be3424b | 10 | void PlayNote(float frequency, float duration, float volume) { |
limcheecheng | 0:1df60be3424b | 11 | _pin.period(1.0/frequency); |
limcheecheng | 0:1df60be3424b | 12 | _pin = volume/2.0; |
limcheecheng | 0:1df60be3424b | 13 | wait(duration); |
limcheecheng | 0:1df60be3424b | 14 | _pin = 0.0; |
limcheecheng | 0:1df60be3424b | 15 | } |
limcheecheng | 0:1df60be3424b | 16 | |
limcheecheng | 0:1df60be3424b | 17 | private: |
limcheecheng | 0:1df60be3424b | 18 | PwmOut _pin; |
limcheecheng | 0:1df60be3424b | 19 | }; |