Make noise with a piezo buzzer. Use a pwm pin. IO expander ints done.
Fork of beep by
beep.h
- Committer:
- jurica238814
- Date:
- 2016-09-23
- Revision:
- 6:936ba3699e47
- Parent:
- 5:49c961e79a12
File content as of revision 6:936ba3699e47:
#ifndef MBED_BEEP_H #define MBED_BEEP_H #include "mbed.h" #define isdigit(n) (n >= '0' && n <= '9') #define OCTAVE_OFFSET 0 /** 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 */ namespace mbed { /* Class: Beep * A class witch uses pwm to controle a beeper to generate sounds. */ class Beep { public: /** Create a Beep object connected to the specified PwmOut pin * * @param pin PwmOut pin to connect to */ Beep (PinName pin); /** 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 (float frequency, float time); void playRttl(char *p); /** stop the beep instantaneous * usually not used */ void nobeep(); private : PwmOut _pwm; Timeout toff; }; } #endif