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First Draft, serial print change based on distance
Beep/beep.cpp@17:02676e9bbc73, 2022-02-04 (annotated)
- Committer:
- liam94
- Date:
- Fri Feb 04 18:30:13 2022 +0000
- Revision:
- 17:02676e9bbc73
- Parent:
- 16:af15244242c2
final update to all comments
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
liam94 | 14:837945ccd8c0 | 1 | #include "beep.h" |
liam94 | 14:837945ccd8c0 | 2 | #include "mbed.h" |
liam94 | 14:837945ccd8c0 | 3 | |
liam94 | 14:837945ccd8c0 | 4 | |
liam94 | 14:837945ccd8c0 | 5 | /** class to make sound with a buzzer, based on a PwmOut |
liam94 | 14:837945ccd8c0 | 6 | * The class use a timeout to switch off the sound - it is not blocking while making noise |
liam94 | 14:837945ccd8c0 | 7 | * |
liam94 | 14:837945ccd8c0 | 8 | * Example: |
liam94 | 14:837945ccd8c0 | 9 | * @code |
liam94 | 14:837945ccd8c0 | 10 | * // Beep with 1Khz for 0.5 seconds |
liam94 | 14:837945ccd8c0 | 11 | * #include "mbed.h" |
liam94 | 14:837945ccd8c0 | 12 | * #include "beep.h" |
liam94 | 14:837945ccd8c0 | 13 | * |
liam94 | 14:837945ccd8c0 | 14 | * Beep buzzer(p21); |
liam94 | 14:837945ccd8c0 | 15 | * |
liam94 | 14:837945ccd8c0 | 16 | * int main() { |
liam94 | 14:837945ccd8c0 | 17 | * ... |
liam94 | 14:837945ccd8c0 | 18 | * buzzer.beep(1000,0.5); |
liam94 | 14:837945ccd8c0 | 19 | * ... |
liam94 | 14:837945ccd8c0 | 20 | * } |
liam94 | 14:837945ccd8c0 | 21 | * @endcode |
liam94 | 14:837945ccd8c0 | 22 | */ |
liam94 | 14:837945ccd8c0 | 23 | |
liam94 | 14:837945ccd8c0 | 24 | using namespace mbed; |
liam94 | 14:837945ccd8c0 | 25 | // constructor |
liam94 | 14:837945ccd8c0 | 26 | /** Create a Beep object connected to the specified PwmOut pin |
liam94 | 14:837945ccd8c0 | 27 | * |
liam94 | 14:837945ccd8c0 | 28 | * @param pin PwmOut pin to connect to |
liam94 | 14:837945ccd8c0 | 29 | */ |
liam94 | 14:837945ccd8c0 | 30 | |
liam94 | 14:837945ccd8c0 | 31 | Beep::Beep(PinName PTC10) : _pwm(PTC10) { |
liam94 | 14:837945ccd8c0 | 32 | _pwm.write(0.0); // after creating it have to be off |
liam94 | 14:837945ccd8c0 | 33 | } |
liam94 | 14:837945ccd8c0 | 34 | |
liam94 | 14:837945ccd8c0 | 35 | /** stop the beep instantaneous |
liam94 | 14:837945ccd8c0 | 36 | * usually not used |
liam94 | 14:837945ccd8c0 | 37 | */ |
liam94 | 14:837945ccd8c0 | 38 | void Beep::nobeep() { |
liam94 | 14:837945ccd8c0 | 39 | _pwm.write(0.0); |
liam94 | 14:837945ccd8c0 | 40 | } |
liam94 | 14:837945ccd8c0 | 41 | |
liam94 | 14:837945ccd8c0 | 42 | /** Beep with given frequency and duration. |
liam94 | 14:837945ccd8c0 | 43 | * |
liam94 | 14:837945ccd8c0 | 44 | * @param frequency - the frequency of the tone in Hz |
liam94 | 14:837945ccd8c0 | 45 | * @param time - the duration of the tone in seconds |
liam94 | 14:837945ccd8c0 | 46 | */ |
liam94 | 14:837945ccd8c0 | 47 | |
liam94 | 14:837945ccd8c0 | 48 | void Beep::beep(float frequency, float time) { |
liam94 | 14:837945ccd8c0 | 49 | |
liam94 | 14:837945ccd8c0 | 50 | _pwm.period(1.0/frequency); |
liam94 | 14:837945ccd8c0 | 51 | _pwm.write(0.5); // 50% duty cycle - beep on |
liam94 | 14:837945ccd8c0 | 52 | // toff.attach(&Beep::nobeep, time); // time to off |
liam94 | 14:837945ccd8c0 | 53 | } |
liam94 | 14:837945ccd8c0 | 54 | |
liam94 | 14:837945ccd8c0 | 55 | |
liam94 | 14:837945ccd8c0 | 56 | |
liam94 | 14:837945ccd8c0 | 57 |