Tummas Tomasson / Mbed 2 deprecated PingDetector_mbedadc

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Dependencies:   mbed

Diff: PingDetect/FFT.cpp

Revision:
1:227db871d328
Parent:
0:efb27fbc92c0
--- a/PingDetect/FFT.cpp	Mon Jul 30 09:57:42 2012 +0000
+++ b/PingDetect/FFT.cpp	Tue Aug 21 14:23:03 2012 +0000
@@ -1,3 +1,7 @@
+/*
+    Program to caluclate the FFT strength of a frequency 
+*/
+
 #include "FFT.h"
 
 // Using the Mellen FFT
@@ -7,10 +11,8 @@
 
     CalculateFFT(data);
 
-    // adding the center frequencies with the 4 closesed frequencies
-//    amp = my[centerFreq-2]+my[centerFreq]+my[centerFreq+2];
+    // adding the center frequencies with the 2 closesed frequencies
     amp = my[centerFreq-2]+my[centerFreq]+my[centerFreq+2];
-//    return amp;
     if (amp >= AMPLITUDE_LIMIT)
         return found; // indicating pinger signal found