Faizan Khan / Mbed OS 4180-lab2-more-io

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Dependencies:   4DGL-uLCD-SE SDFileSystem

Files at this revision

API Documentation at this revision

Revision 4:f5bc5d9a790b, committed 2016-09-23

Comitter:
fkhan39
Date:
Fri Sep 23 19:45:44 2016 +0000
Parent:
3:99acbebbed6c
Child:
5:151b0fa1fb44
Commit message:
added mems microphone test;

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/main.cpp	Fri Sep 23 19:34:38 2016 +0000
+++ b/main.cpp	Fri Sep 23 19:45:44 2016 +0000
@@ -1,5 +1,42 @@
 #include "mbed.h"
 
+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);
+    }
+}
+/*
+
 AnalogOut aout(p18);
 AnalogIn ain(p15);
 DigitalOut led1(LED1);
@@ -9,6 +46,9 @@
 
 int main()
 {
+    
+    
+    /*
     // part 1
     const double pi = 3.141592653589793238462;
     const double amplitude = 1.0f;
@@ -66,4 +106,3 @@
 
     printf("Done\n");
     */
-}
\ No newline at end of file