Alexander Hentschel
Fork of beep lib. Enables play of continous tones and changing of frequency on the fly
Fork of
beep
by 
Peter Drescher
Diff: beep.c
- Revision:
- 0:18e4a9c978ec
- Child:
- 2:a34405c20cf5
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/beep.c Tue Feb 01 18:44:45 2011 +0000
@@ -0,0 +1,26 @@
+#include "beep.h"
+#include "mbed.h"
+
+using namespace mbed;
+// constructor
+Beep::Beep(PinName pin) : _pwm(pin) {
+ _pwm.write(0.0); // after creating it have to be off
+}
+
+// switch off
+void Beep::nobeep() {
+ _pwm.write(0.0);
+}
+
+
+// beep
+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
+}
+
+
+
+