ECE 4180 Labs
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Dependencies: mbed
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SPW2430_Microphone_Hello_World
by 
jim hamblen
Revision 0:1a0cc42c459d, committed 2015-11-28
- Comitter:
- 4180_1
- Date:
- Sat Nov 28 01:48:05 2015 +0000
- Commit message:
- ver 1.0
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
--- /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);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Sat Nov 28 01:48:05 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/9296ab0bfc11 \ No newline at end of file