ece 4180 project 2019
Dependencies: mbed wave_player mbed-rtos 4DGL-uLCD-SE SDFileSystem FATFileSystem
Speaker.h@3:221fb009c1ac, 2019-04-20 (annotated)
- Committer:
- rhuang77
- Date:
- Sat Apr 20 21:47:57 2019 +0000
- Revision:
- 3:221fb009c1ac
- Parent:
- 0:567492543056
finalizing details
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
rhuang77 | 0:567492543056 | 1 | #include "mbed.h" |
rhuang77 | 0:567492543056 | 2 | // new class to play a note on Speaker based on PwmOut class |
rhuang77 | 0:567492543056 | 3 | class Speaker |
rhuang77 | 0:567492543056 | 4 | { |
rhuang77 | 0:567492543056 | 5 | public: |
rhuang77 | 0:567492543056 | 6 | Speaker(PinName pin) : _pin(pin) { |
rhuang77 | 0:567492543056 | 7 | // _pin(pin) means pass pin to the Speaker Constructor |
rhuang77 | 0:567492543056 | 8 | } |
rhuang77 | 0:567492543056 | 9 | // class method to play a note based on PwmOut class |
rhuang77 | 0:567492543056 | 10 | void PlayNote(float frequency, float duration, float volume) { |
rhuang77 | 0:567492543056 | 11 | _pin.period(1.0/frequency); |
rhuang77 | 0:567492543056 | 12 | _pin = volume/2.0; |
rhuang77 | 0:567492543056 | 13 | wait(duration); |
rhuang77 | 0:567492543056 | 14 | _pin = 0.0; |
rhuang77 | 0:567492543056 | 15 | } |
rhuang77 | 0:567492543056 | 16 | |
rhuang77 | 0:567492543056 | 17 | private: |
rhuang77 | 0:567492543056 | 18 | PwmOut _pin; |
rhuang77 | 0:567492543056 | 19 | }; |