awef
Fork of Speaker by
Speaker.h@1:bd28eb0ec6f8, 2015-12-08 (annotated)
- Committer:
- UnitedHolmes
- Date:
- Tue Dec 08 00:43:32 2015 +0000
- Revision:
- 1:bd28eb0ec6f8
- Parent:
- 0:41292907c9cb
latest edit;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
zchen311 | 0:41292907c9cb | 1 | #include "mbed.h" |
zchen311 | 0:41292907c9cb | 2 | // new class to play a note on Speaker based on PwmOut class |
zchen311 | 0:41292907c9cb | 3 | class Speaker |
zchen311 | 0:41292907c9cb | 4 | { |
zchen311 | 0:41292907c9cb | 5 | public: |
zchen311 | 0:41292907c9cb | 6 | Speaker(PinName pin) : _pin(pin) { |
zchen311 | 0:41292907c9cb | 7 | // _pin(pin) means pass pin to the Speaker Constructor |
zchen311 | 0:41292907c9cb | 8 | } |
zchen311 | 0:41292907c9cb | 9 | // class method to play a note based on PwmOut class |
UnitedHolmes | 1:bd28eb0ec6f8 | 10 | void PlayNote(float frequency, float frequency2, float duration, float volume) { |
UnitedHolmes | 1:bd28eb0ec6f8 | 11 | if (frequency == 0) { |
UnitedHolmes | 1:bd28eb0ec6f8 | 12 | _pin.period(1.0/frequency2); |
UnitedHolmes | 1:bd28eb0ec6f8 | 13 | _pin = volume/2.0; |
UnitedHolmes | 1:bd28eb0ec6f8 | 14 | wait(duration); |
UnitedHolmes | 1:bd28eb0ec6f8 | 15 | } |
UnitedHolmes | 1:bd28eb0ec6f8 | 16 | else if(frequency2 == 0) { |
UnitedHolmes | 1:bd28eb0ec6f8 | 17 | _pin.period(1.0/frequency); |
UnitedHolmes | 1:bd28eb0ec6f8 | 18 | _pin = volume/2.0; |
UnitedHolmes | 1:bd28eb0ec6f8 | 19 | wait(duration); |
UnitedHolmes | 1:bd28eb0ec6f8 | 20 | } |
UnitedHolmes | 1:bd28eb0ec6f8 | 21 | else { |
UnitedHolmes | 1:bd28eb0ec6f8 | 22 | _pin.period(1.0/frequency); |
UnitedHolmes | 1:bd28eb0ec6f8 | 23 | _pin = volume/2.0; |
UnitedHolmes | 1:bd28eb0ec6f8 | 24 | wait(.008); |
UnitedHolmes | 1:bd28eb0ec6f8 | 25 | _pin = 0.0; |
UnitedHolmes | 1:bd28eb0ec6f8 | 26 | _pin.period(1.0/frequency2); |
zchen311 | 0:41292907c9cb | 27 | _pin = volume/2.0; |
UnitedHolmes | 1:bd28eb0ec6f8 | 28 | wait(.008); |
UnitedHolmes | 1:bd28eb0ec6f8 | 29 | } |
UnitedHolmes | 1:bd28eb0ec6f8 | 30 | } |
UnitedHolmes | 1:bd28eb0ec6f8 | 31 | |
UnitedHolmes | 1:bd28eb0ec6f8 | 32 | void StopPlaying() { |
UnitedHolmes | 1:bd28eb0ec6f8 | 33 | _pin = 0; |
UnitedHolmes | 1:bd28eb0ec6f8 | 34 | wait(0.001); |
zchen311 | 0:41292907c9cb | 35 | } |
zchen311 | 0:41292907c9cb | 36 | |
zchen311 | 0:41292907c9cb | 37 | private: |
zchen311 | 0:41292907c9cb | 38 | PwmOut _pin; |
zchen311 | 0:41292907c9cb | 39 | }; |