Michele Furlanetto / Mbed 2 deprecated mbed_keyboard

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Dependencies:   TextLCD mbed MMA8451Q TSI

Diff: Speaker.h

Revision:
8:60231840370f
Parent:
6:459ddd3079fa
Child:
10:6e18b220e10c
--- a/Speaker.h	Fri Sep 18 15:46:20 2015 +0000
+++ b/Speaker.h	Sat Sep 19 10:04:37 2015 +0000
@@ -1,4 +1,7 @@
 #include "mbed.h"
+
+#ifndef SPEAKER
+#define SPEAKER
 // new class to play a note on Speaker based on PwmOut class
 // based on zchen311 implementation
 // http://mbed.org/users/zchen311/code/Speaker/
@@ -11,16 +14,17 @@
     _volume=0.2;
     }
     // class method to play a note based on PwmOut class
-    void changeFrequency(int delta) {
+    void changeFrequency(double delta) {
         frequency+=delta;
         if(frequency >0){
             _pin.period(1.0/frequency);
             _pin = _volume/2.0;
         } else {
                _pin = 0;
+               frequency=0;
         }
     }
-    int getFreq(){
+    double getFreq(){
         return frequency;   
     }
     float* getVolumeBuffer(){
@@ -29,5 +33,7 @@
 private:
     PwmOut _pin;
     float _volume;
-    int frequency;
-};
\ No newline at end of file
+    double frequency;
+};
+
+#endif
\ No newline at end of file