Diff: main.cpp

Revision:

0:c35b8a23a863

Child:

1:2ef356b500f2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Oct 26 08:06:57 2015 +0000
@@ -0,0 +1,89 @@
+//-----------------------------------------------------------
+//  Demo waveform and spectrum display
+//
+//  2015/10/26, Copyright (c) 2015 MIKAMI, Naoki
+//-----------------------------------------------------------
+
+#include "vowel_data.hpp"
+#include "button.hpp"
+#include "waveform_display.hpp"
+#include "FFT_Analysis.hpp"
+#include "SpectrumDisplay.hpp"
+#include "LPC_Analysis.hpp"
+
+using namespace Mikami;
+
+const int N_FFT_ = 512;     // number of date for FFT
+
+const int X0_ = 50;         // Origin for x axis
+const int Y0_ = 236;        // Origin for y axis
+const float DB1_ = 2.4f;    // Pixels for 1 dB
+const int BIN_ = 1;         // Pixels per bin
+const int MAX_DB_ = 60;     // Maximum dB
+
+const int FS_ = 8000;      // Sampling frequency: 8 kHz
+
+
+LCD_DISCO_F746NG lcd_;
+TS_DISCO_F746NG ts_;
+
+FftAnalyzer fft_(N_DATA_, N_FFT_);      // using FFT
+LpcAnalyzer lpc_(N_DATA_, 10, N_FFT_);  // using linear prediction
+
+int main()
+{
+    const char AIUEO[5] = {'a', 'i', 'u', 'e', 'o'};
+    int16_t sn[N_DATA_];
+    float sn_f[N_DATA_];
+    float db1[N_FFT_/2+1];  // Log powerspectrum using FFT
+    float db2[N_FFT_/2+1];  // Log powerspectrum using linear prediction
+    
+    uint32_t backColor = LCD_COLOR_LIGHTBLUE;
+    lcd_.Clear(backColor);
+
+    Button *buttons[5];
+    for (int n=0; n<5; n++)
+    {
+        char strButton[8];
+        sprintf(strButton, "/%c/", AIUEO[n]);
+        buttons[n] = new Button(lcd_, ts_, 430, 15+50*n, 50, 40,
+                                LCD_COLOR_BLUE, strButton, Font16);
+    }
+    Button fftButtonBar(lcd_, ts_, 340, 15, 80, 40, LCD_COLOR_MAGENTA, "FFT (Bar)", Font12);
+    Button fftButtonLine(lcd_, ts_, 340, 65, 80, 40, LCD_COLOR_MAGENTA, "FFT (Line)", Font12);
+    Button lpButton(lcd_, ts_, 340, 115, 80, 40, LCD_COLOR_MAGENTA, "LP", Font12);
+    lcd_.SetBackColor(backColor);
+      
+    SpectrumDisplay disp(lcd_, N_FFT_, X0_, Y0_, DB1_, BIN_, MAX_DB_, FS_);
+    bool dataOk = false;
+    while (true)
+    {
+        for (int k=0; k<N_VOWEL_; k++)
+        {
+            if (buttons[k]->Touched())
+            {
+                for (int n=0; n<N_DATA_; n++) sn[n] = sn_[k][n];
+                WaveformDisplay(lcd_, 50, 40, sn, N_DATA_, backColor);
+
+                for (int n=0; n<N_DATA_; n++) sn_f[n] = sn[n];
+                fft_.Execute(sn_f, db1);
+                lpc_.Execute(sn_f, db2);
+                dataOk = true;
+                disp.Clear(backColor);
+            }
+        }
+        
+        if (fftButtonBar.Touched() && dataOk)
+            disp.BarChart(db1, backColor);
+
+        if (fftButtonLine.Touched() && dataOk)
+            disp.LineChart(db1, backColor);
+
+        if (lpButton.Touched() && dataOk)
+            disp.LineChart(db2, backColor);
+
+        wait(0.1);
+    }
+}
+
+