Josh Williams
Sonar Proximity Audio Alert for Robot
Dependencies: HC_SR04_Ultrasonic_Library Motor mbed-rtos mbed
Fork of
rtos_basic
by 
mbed official
Diff: Speaker.h
- Revision:
- 12:42d63181dbdb
diff -r 0309bef74ba8 -r 42d63181dbdb Speaker.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Speaker.h Mon Mar 13 18:35:56 2017 +0000
@@ -0,0 +1,19 @@
+#include "mbed.h"
+// a new class to play a note on Speaker based on PwmOut class
+class Speaker
+{
+public:
+ Speaker(PinName pin) : _pin(pin) {
+// _pin(pin) means pass pin to the Speaker Constructor
+ }
+// class method to play a note based on PwmOut class
+ void PlayNote(float frequency, float duration, float volume) {
+ _pin.period(1.0/frequency);
+ _pin = volume/2.0;
+ wait(duration);
+ _pin = 0.0;
+ }
+
+private:
+ PwmOut _pin;
+};
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