Fix to issues #6 and #7. Cleaning imaginary to avoid OVF.

kosme · Aug 28, 2017 · 690c071 · 690c071
1 parent 8952252
commit 690c071
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diff --git a/Examples/FFT_01/FFT_01.ino b/Examples/FFT_01/FFT_01.ino
@@ -63,6 +63,7 @@ void loop()
   {
     vReal[i] = int8_t((amplitude * (sin((i * (twoPi * cycles)) / samples))) / 2.0);/* Build data with positive and negative values*/
     //vReal[i] = uint8_t((amplitude * (sin((i * (twoPi * cycles)) / samples) + 1.0)) / 2.0);/* Build data displaced on the Y axis to include only positive values*/
+    vImag[i] = 0.0; //Imaginary part must be zeroed in case of looping to avoid wrong calculations and overflows
   }
   /* Print the results of the simulated sampling according to time */
   Serial.println("Data:");

diff --git a/Examples/FFT_03/FFT_03.ino b/Examples/FFT_03/FFT_03.ino
@@ -56,6 +56,7 @@ void loop()
   for(uint16_t i =0;i<samples;i++)
   {
     vReal[i] = double(analogRead(CHANNEL));
+    vImag[i] = 0.0; //Imaginary part must be zeroed in case of looping to avoid wrong calculations and overflows
     if(samplingFrequency<=1000)
       delay(delayTime);
     else

diff --git a/library.properties b/library.properties
@@ -1,5 +1,5 @@
 name=arduinoFFT
-version=1.2
+version=1.2.1
 author=kosme <enrique@shapeoko.com>
 maintainer=Enrique Condes <enrique@shapeoko.com>
 sentence=A library for implementing Fast Fourier Transform on Arduino.