Fork of beep lib. Enables play of continous tones and changing of frequency on the fly
Fork of beep by
Diff: beep.cpp
- Revision:
- 5:a844c1579d27
- Parent:
- 4:d8e14429a95f
--- a/beep.cpp Tue Sep 11 08:21:45 2012 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,56 +0,0 @@ -#include "beep.h" -#include "mbed.h" - -/** class to make sound with a buzzer, based on a PwmOut - * The class use a timeout to switch off the sound - it is not blocking while making noise - * - * Example: - * @code - * // Beep with 1Khz for 0.5 seconds - * #include "mbed.h" - * #include "beep.h" - * - * Beep buzzer(p21); - * - * int main() { - * ... - * buzzer.beep(1000,0.5); - * ... - * } - * @endcode - */ - -using namespace mbed; - // constructor - /** Create a Beep object connected to the specified PwmOut pin - * - * @param pin PwmOut pin to connect to - */ - -Beep::Beep(PinName pin) : _pwm(pin) { - _pwm.write(0.0); // after creating it have to be off -} - - /** stop the beep instantaneous - * usually not used - */ -void Beep::nobeep() { - _pwm.write(0.0); -} - -/** Beep with given frequency and duration. - * - * @param frequency - the frequency of the tone in Hz - * @param time - the duration of the tone in seconds - */ - -void Beep::beep(float freq, float time) { - - _pwm.period(1.0/freq); - _pwm.write(0.5); // 50% duty cycle - beep on - toff.attach(this,&Beep::nobeep, time); // time to off -} - - - -