Wifi IoT Project
Dependencies: 4DGL-uLCD-SE mbed
Speaker.h@0:6e8326358c6c, 2016-11-01 (annotated)
- Committer:
- yscho529
- Date:
- Tue Nov 01 19:51:07 2016 +0000
- Revision:
- 0:6e8326358c6c
Wifi IoT
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
yscho529 | 0:6e8326358c6c | 1 | #include "mbed.h" |
yscho529 | 0:6e8326358c6c | 2 | // new class to play a note on Speaker based on PwmOut class |
yscho529 | 0:6e8326358c6c | 3 | class Speaker |
yscho529 | 0:6e8326358c6c | 4 | { |
yscho529 | 0:6e8326358c6c | 5 | public: |
yscho529 | 0:6e8326358c6c | 6 | Speaker(PinName pin) : _pin(pin) { |
yscho529 | 0:6e8326358c6c | 7 | // _pin(pin) means pass pin to the Speaker Constructor |
yscho529 | 0:6e8326358c6c | 8 | } |
yscho529 | 0:6e8326358c6c | 9 | // class method to play a note based on PwmOut class |
yscho529 | 0:6e8326358c6c | 10 | void PlayNote(float frequency, float duration, float volume) { |
yscho529 | 0:6e8326358c6c | 11 | _pin.period(1.0/frequency); |
yscho529 | 0:6e8326358c6c | 12 | _pin = volume/2.0; |
yscho529 | 0:6e8326358c6c | 13 | wait(duration); |
yscho529 | 0:6e8326358c6c | 14 | _pin = 0.0; |
yscho529 | 0:6e8326358c6c | 15 | } |
yscho529 | 0:6e8326358c6c | 16 | |
yscho529 | 0:6e8326358c6c | 17 | private: |
yscho529 | 0:6e8326358c6c | 18 | PwmOut _pin; |
yscho529 | 0:6e8326358c6c | 19 | }; |