不韋 呂 / Mbed 2 deprecated F746_RealtimeSpectrumAnalyzer_MEMS_Mic

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Dependencies:   BSP_DISCO_F746NG BUTTON_GROUP LCD_DISCO_F746NG TS_DISCO_F746NG UIT_FFT_Real mbed

Diff: MyClasses_Functions/SpectrumDisplay.cpp

Revision:
4:2cdaad00d208
Parent:
1:ac0a67a0deec
--- a/MyClasses_Functions/SpectrumDisplay.cpp	Fri Jan 08 13:03:24 2016 +0000
+++ b/MyClasses_Functions/SpectrumDisplay.cpp	Sun Jan 10 09:58:43 2016 +0000
@@ -1,7 +1,7 @@
 //-------------------------------------------------------
 //  Class for display spectrum
 //
-//  2016/01/07, Copyright (c) 2015 MIKAMI, Naoki
+//  2016/01/10, Copyright (c) 2015 MIKAMI, Naoki
 //-------------------------------------------------------
 
 #include "SpectrumDisplay.hpp"
@@ -26,19 +26,30 @@
 
     void SpectrumDisplay::Draw(float db[])
     {
+        static const int TOP = Y0_ - (int)(MAX_DB_*DB1_);
         lcd_.SetTextColor(BACK_COLOR_);
         lcd_.FillRect(X0_+1, Y0_-(int)(MAX_DB_*DB1_),
                       N_FFT_*BIN_/2, MAX_DB_*DB1_);
 
         float h = ((db[1] + OFFSET_) > 0)? db[1] + OFFSET_ : 0;
+        if (h > MAX_DB_) h = MAX_DB_;
         int y1 = Y0_ - (int)(h*DB1_);
+        lcd_.SetTextColor(LINE_COLOR_);
         for (int n=1; n<N_FFT_/2; n++)
         {
             float h2 = ((db[n+1] + OFFSET_) > 0)? db[n+1] + OFFSET_ : 0;
             if (h2 > MAX_DB_) h2 = MAX_DB_;
             int y2 = Y0_ - (int)(h2*DB1_);
-            lcd_.SetTextColor(LINE_COLOR_);
-            lcd_.DrawLine(X0_+n, y1, X0_+n+1, y2);
+
+            if ( (y1 <= TOP) && (y2 <= TOP) )
+            {   // Out of displaying boundaries
+                lcd_.SetTextColor(LCD_COLOR_RED);
+                lcd_.DrawHLine(X0_+n, TOP, 1);
+                lcd_.SetTextColor(LINE_COLOR_);
+            }
+            else
+                lcd_.DrawLine(X0_+n, y1, X0_+n+1, y2);
+            if (y1 <= TOP) lcd_.DrawPixel(X0_+n, y1, LCD_COLOR_RED);
             y1 = y2;
         }
         lcd_.SetTextColor(AXIS_COLOR_);