Make noise with a piezo buzzer. Use a pwm pin.

Dependents:   Cave_Runner popcorn default USBMIDI_Buzzer ... more

Files at this revision

API Documentation at this revision

Comitter:
dreschpe
Date:
Tue Sep 11 08:21:45 2012 +0000
Parent:
3:5a8242af60ba
Commit message:
change beep.c to beep.cpp to avoid compiler problems

Changed in this revision

beep.c Show diff for this revision Revisions of this file
beep.cpp Show annotated file Show diff for this revision Revisions of this file
diff -r 5a8242af60ba -r d8e14429a95f beep.c
--- a/beep.c	Wed Feb 02 22:38:30 2011 +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
-}
-
-
-
-
diff -r 5a8242af60ba -r d8e14429a95f beep.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/beep.cpp	Tue Sep 11 08:21:45 2012 +0000
@@ -0,0 +1,56 @@
+#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
+}
+
+
+
+