Work in progress.

global.h

@@ -35,7 +35,7 @@
 
 
 #define PROGRAM_NAME          "DSRemote"
-#define PROGRAM_VERSION       "0.32_1601091517"
+#define PROGRAM_VERSION       "0.32_1601091631"
 
 #define MAX_PATHLEN            4096
 

mainwindow.cpp

@@ -466,6 +466,10 @@ void UI_Mainwindow::close_connection()
 
   scrn_thread->set_device(NULL);
 
+  devparms.math_fft = 0;
+
+  devparms.math_fft_split = 0;
+
   waveForm->clear();
 
   tmc_close();

signalcurve.cpp

@@ -734,7 +734,12 @@ void SignalCurve::drawFFT(QPainter *painter, int curve_h_b, int curve_w_b)
 
 /////////////////////////////////// FFT: draw the curve ///////////////////////////////////////////
 
-  if((devparms->fftbufsz > 32) && devparms->chandisplay[devparms->math_fft_src] && (bufsize > 32))
+  if(bufsize < 32)
+  {
+    return;
+  }
+
+  if((devparms->fftbufsz > 32) && devparms->chandisplay[devparms->math_fft_src])
   {
     painter->setClipping(true);
     painter->setClipRegion(QRegion(0, 0, curve_w, curve_h), Qt::ReplaceClip);