Diff: main.cpp

Revision:

0:1a0cc42c459d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Nov 28 01:48:05 2015 +0000
@@ -0,0 +1,37 @@
+#include "mbed.h"
+//Adafruit MEMs SPW2430 microphone demo - LEDs display audio level
+BusOut myleds(LED1,LED2,LED3,LED4);
+
+class microphone
+{
+public :
+    microphone(PinName pin);
+    float read();
+    operator float ();
+private :
+    AnalogIn _pin;
+};
+microphone::microphone (PinName pin):
+    _pin(pin)
+{
+}
+float microphone::read()
+{
+    return _pin.read();
+}
+inline microphone::operator float ()
+{
+    return _pin.read();
+}
+
+microphone mymicrophone(p16);
+
+int main()
+{
+    while(1) {
+//read in, subtract 0.67 DC bias, take absolute value, and scale up .1Vpp to 15 for builtin LED display
+        myleds = int(abs((mymicrophone - (0.67/3.3)))*500.0);
+//Use an 8kHz audio sample rate (phone quality audio);
+        wait(1.0/8000.0);
+    }
+}