Diff: Piezo_Buzzer/piezo_bz.h

Revision:

7:acf82069b794

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Piezo_Buzzer/piezo_bz.h	Thu Aug 25 13:50:39 2022 +0000
@@ -0,0 +1,100 @@
+/*
+ * Mbed library program
+ *  Control Piezo Transducer
+ *
+ * Copyright (c) 2018 Kenji Arai / JH1PJL
+ *  http://www.page.sannet.ne.jp/kenjia/index.html
+ *  http://mbed.org/users/kenjiArai/
+ *      Created:    Feburary  28th, 2018
+ *      Revised:    March      3rd, 2018
+ */
+
+// Tested: Nucleo-F446RE with Akizuki PT08-Z185R
+//      http://akizukidenshi.com/catalog/g/gP-01251/
+
+/*
+    Refrence:
+        https://os.mbed.com/users/MikamiUitOpen/code/UIT_Sounder_OnOff/
+        by 不韋 呂 さん(Mikami-san)
+ */
+
+#ifndef MBED_PIEZOBZ_H
+#define MBED_PIEZOBZ_H
+
+#include "mbed.h"
+
+/**  Interface for Piezo Buzzer
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "piezo_bz.h"
+ *
+ * PIEZO_BZ bz(D8, 3000U, 500U);   // 3kHz 0.5 sec duty
+ *
+ * int main() {
+ *     while(1) {
+ *         bz.start();
+ *         wait(5.0f);
+ *         bz.stop();
+ *         wait(1.0f);
+ *     }
+ * }
+ *
+ * @endcode
+ */
+
+#define CONTINUOUS_MODE     0U
+
+/** Piezo Buzzer class
+ */
+class PIEZO_BZ
+{
+public:
+
+    /** Create a Piezo Buzzer instance
+     *
+     * @param pin for Piezo Buzzer (another pin connect GND)
+     * @param Buzzer frequency [Hz]
+     * @param Duration for ringing time and rest time (duty 50%) [mS]
+     *          on_off_time = 0 -> Continuous mode
+     */
+    PIEZO_BZ(PinName pin, uint32_t freq, uint32_t on_off_time);
+
+    /** Destructor of Piezo Buzzer
+     */
+    virtual ~PIEZO_BZ();
+
+    /** Start Buzzer
+     */
+    void start(void);
+
+    /** Stop Buzzer
+     */
+    void stop(void);
+
+    /** Change buzzer frequency
+     * @param Buzzer frequency [Hz]
+     */
+    void change_frequency(uint32_t freq);
+
+    /** Change On-Off duration
+     * @param Duration for ringing time and rest time (duty 50%) [mS]
+     */
+    void change_on_off(uint32_t on_off_time);
+
+private:
+    void create_freq_irq(void);
+    void create_onoff_irq(void);
+
+    DigitalOut  _pin;
+    Ticker      _t0;
+    Ticker      _t1;
+    uint32_t    freq;
+    uint32_t    t_onoff;
+    bool        out;
+    bool        flag_onoff;
+    bool        flag_run;
+    bool        flag_continuous;
+};
+
+#endif // MBED_PIEZOBZ_H