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beep.h
00001 #ifndef MBED_BEEP_H 00002 #define MBED_BEEP_H 00003 00004 #include "mbed.h" 00005 00006 /** Beep Class 00007 * @brief Acknowledgements to EJ Teb 00008 * 00009 * @brief class to make sound with a buzzer, based on a PwmOut 00010 * @brief The class use a timeout to switch off the sound - it is not blocking while making noise 00011 * 00012 * Example: 00013 * @code 00014 * // Beep with 1Khz for 0.5 seconds 00015 * #include "mbed.h" 00016 * #include "beep.h" 00017 * 00018 * Beep buzzer(p21); 00019 * 00020 * int main() { 00021 * ... 00022 * buzzer.beep(1000,0.5); 00023 * ... 00024 * } 00025 * @endcode 00026 */ 00027 00028 00029 namespace mbed { 00030 00031 /* Class: Beep 00032 * A class witch uses pwm to controle a beeper to generate sounds. 00033 */ 00034 class Beep { 00035 00036 public: 00037 00038 /** Create a Beep object connected to the specified PwmOut pin 00039 * 00040 * @param pin PwmOut pin to connect to 00041 */ 00042 Beep (PinName PTC10); 00043 00044 /** Beep with given frequency and duration. 00045 * 00046 * @param frequency - the frequency of the tone in Hz 00047 * @param time - the duration of the tone in seconds 00048 */ 00049 void beep (float frequency, float time); 00050 00051 /** stop the beep instantaneous 00052 * usually not used 00053 */ 00054 void nobeep(); 00055 00056 private : 00057 PwmOut _pwm; 00058 Timeout toff; 00059 }; 00060 00061 } 00062 #endif
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