Joseph Roberts
/
beep
Important changes to repositories hosted on mbed.com
Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.
To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.
It is also possible to export all your personal repositories from the account settings page.
Fork of
beep
by 
Peter Drescher
beep.cpp@5:372aa7360db7, 2014-02-22 (annotated)
- Committer:
- joe4465
- Date:
- Sat Feb 22 13:11:02 2014 +0000
- Revision:
- 5:372aa7360db7
- Parent:
- 4:d8e14429a95f
commit before library update
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| dreschpe | 0:18e4a9c978ec | 1 | #include "beep.h" |
| dreschpe | 0:18e4a9c978ec | 2 | #include "mbed.h" |
| dreschpe | 0:18e4a9c978ec | 3 | |
| dreschpe | 2:a34405c20cf5 | 4 | /** class to make sound with a buzzer, based on a PwmOut |
| dreschpe | 3:5a8242af60ba | 5 | * The class use a timeout to switch off the sound - it is not blocking while making noise |
| dreschpe | 3:5a8242af60ba | 6 | * |
| dreschpe | 3:5a8242af60ba | 7 | * Example: |
| dreschpe | 3:5a8242af60ba | 8 | * @code |
| dreschpe | 3:5a8242af60ba | 9 | * // Beep with 1Khz for 0.5 seconds |
| dreschpe | 3:5a8242af60ba | 10 | * #include "mbed.h" |
| dreschpe | 3:5a8242af60ba | 11 | * #include "beep.h" |
| dreschpe | 3:5a8242af60ba | 12 | * |
| dreschpe | 3:5a8242af60ba | 13 | * Beep buzzer(p21); |
| dreschpe | 3:5a8242af60ba | 14 | * |
| dreschpe | 3:5a8242af60ba | 15 | * int main() { |
| dreschpe | 3:5a8242af60ba | 16 | * ... |
| dreschpe | 3:5a8242af60ba | 17 | * buzzer.beep(1000,0.5); |
| dreschpe | 3:5a8242af60ba | 18 | * ... |
| dreschpe | 3:5a8242af60ba | 19 | * } |
| dreschpe | 3:5a8242af60ba | 20 | * @endcode |
| dreschpe | 3:5a8242af60ba | 21 | */ |
| dreschpe | 2:a34405c20cf5 | 22 | |
| dreschpe | 0:18e4a9c978ec | 23 | using namespace mbed; |
| dreschpe | 3:5a8242af60ba | 24 | // constructor |
| dreschpe | 2:a34405c20cf5 | 25 | /** Create a Beep object connected to the specified PwmOut pin |
| dreschpe | 3:5a8242af60ba | 26 | * |
| dreschpe | 3:5a8242af60ba | 27 | * @param pin PwmOut pin to connect to |
| dreschpe | 3:5a8242af60ba | 28 | */ |
| dreschpe | 2:a34405c20cf5 | 29 | |
| joe4465 | 5:372aa7360db7 | 30 | Beep::Beep(PinName pin) : _digitalOut(pin) { |
| joe4465 | 5:372aa7360db7 | 31 | _digitalOut.write(0); // after creating it have to be off |
| dreschpe | 0:18e4a9c978ec | 32 | } |
| dreschpe | 0:18e4a9c978ec | 33 | |
| dreschpe | 2:a34405c20cf5 | 34 | /** stop the beep instantaneous |
| dreschpe | 3:5a8242af60ba | 35 | * usually not used |
| dreschpe | 3:5a8242af60ba | 36 | */ |
| dreschpe | 0:18e4a9c978ec | 37 | void Beep::nobeep() { |
| joe4465 | 5:372aa7360db7 | 38 | _digitalOut.write(0); |
| dreschpe | 0:18e4a9c978ec | 39 | } |
| dreschpe | 0:18e4a9c978ec | 40 | |
| dreschpe | 2:a34405c20cf5 | 41 | /** Beep with given frequency and duration. |
| dreschpe | 3:5a8242af60ba | 42 | * |
| dreschpe | 3:5a8242af60ba | 43 | * @param frequency - the frequency of the tone in Hz |
| dreschpe | 3:5a8242af60ba | 44 | * @param time - the duration of the tone in seconds |
| dreschpe | 3:5a8242af60ba | 45 | */ |
| dreschpe | 2:a34405c20cf5 | 46 | |
| joe4465 | 5:372aa7360db7 | 47 | void Beep::beep(float time) { |
| dreschpe | 0:18e4a9c978ec | 48 | |
| joe4465 | 5:372aa7360db7 | 49 | _digitalOut.write(1); |
| dreschpe | 0:18e4a9c978ec | 50 | toff.attach(this,&Beep::nobeep, time); // time to off |
| dreschpe | 0:18e4a9c978ec | 51 | } |
| dreschpe | 0:18e4a9c978ec | 52 | |
| dreschpe | 0:18e4a9c978ec | 53 | |
| dreschpe | 0:18e4a9c978ec | 54 | |
| dreschpe | 0:18e4a9c978ec | 55 |