Macdonald Nwabia
/
ElderPlus_SecuritySystem
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Door_1_Docs/Speaker.h@1:9d7c34bfe43e, 2020-12-15 (annotated)
- Committer:
- nwabiam
- Date:
- Tue Dec 15 18:15:48 2020 +0000
- Revision:
- 1:9d7c34bfe43e
Simple Electronic Lock (Solenoid) code
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| nwabiam | 1:9d7c34bfe43e | 1 | #include "mbed.h" |
| nwabiam | 1:9d7c34bfe43e | 2 | // new class to play a note on Speaker based on PwmOut class |
| nwabiam | 1:9d7c34bfe43e | 3 | class Speaker |
| nwabiam | 1:9d7c34bfe43e | 4 | { |
| nwabiam | 1:9d7c34bfe43e | 5 | public: |
| nwabiam | 1:9d7c34bfe43e | 6 | Speaker(PinName pin) : _pin(pin) { |
| nwabiam | 1:9d7c34bfe43e | 7 | // _pin(pin) means pass pin to the Speaker Constructor |
| nwabiam | 1:9d7c34bfe43e | 8 | } |
| nwabiam | 1:9d7c34bfe43e | 9 | // class method to play a note based on PwmOut class |
| nwabiam | 1:9d7c34bfe43e | 10 | void PlayNote(float frequency, float duration, float volume) { |
| nwabiam | 1:9d7c34bfe43e | 11 | _pin.period(1.0/frequency); |
| nwabiam | 1:9d7c34bfe43e | 12 | _pin = volume/2.0; |
| nwabiam | 1:9d7c34bfe43e | 13 | wait(duration); |
| nwabiam | 1:9d7c34bfe43e | 14 | _pin = 0.0; |
| nwabiam | 1:9d7c34bfe43e | 15 | } |
| nwabiam | 1:9d7c34bfe43e | 16 | |
| nwabiam | 1:9d7c34bfe43e | 17 | private: |
| nwabiam | 1:9d7c34bfe43e | 18 | PwmOut _pin; |
| nwabiam | 1:9d7c34bfe43e | 19 | }; |