main.cpp

00001 //-----------------------------------------------------------
00002 //  Demo waveform and spectrum display
00003 //      Tap the screen to begin the spectrum analyzer 
00004 //  No photo version of "F746_SpectralAnalysis_Example"
00005 //
00006 //  2015/11/24, Copyright (c) 2015 MIKAMI, Naoki
00007 //-----------------------------------------------------------
00008 
00009 #include "vowel_data.hpp"
00010 #include "button_group.hpp"
00011 #include "waveform_display.hpp"
00012 #include "FFT_Analysis.hpp"
00013 #include "SpectrumDisplay.hpp"
00014 #include "LPC_Analysis.hpp"
00015 
00016 using namespace Mikami;
00017 
00018 const int N_FFT_ = 512;     // number of date for FFT
00019 const int X0_ = 50;         // Origin for x axis
00020 const int Y0_ = 236;        // Origin for y axis
00021 const float DB1_ = 2.4f;    // Pixels for 1 dB
00022 const int BIN_ = 1;         // Pixels per bin
00023 const int W_DB = 60;        // Width in dB to be displayed
00024 
00025 const int FS_ = 8000;       // Sampling frequency: 8 kHz
00026 
00027 LCD_DISCO_F746NG lcd_;
00028 TS_DISCO_F746NG ts_;
00029 
00030 FftAnalyzer fft_(N_DATA_, N_FFT_);      // using FFT
00031 LpcAnalyzer lpc_(N_DATA_, 10, N_FFT_);  // using linear prediction
00032 
00033 int main()
00034 {
00035     int16_t sn[N_DATA_];
00036     float sn_f[N_DATA_];
00037     float db1[N_FFT_/2+1];  // Log powerspectrum using FFT
00038     float db2[N_FFT_/2+1];  // Log powerspectrum using linear prediction
00039 
00040     uint32_t backColor = 0xFF006A6C;            // teal green
00041     lcd_.Clear(backColor);
00042 
00043     const string AIUEO[5] = {"/a/", "/i/", "/u/", "/e/", "/o/"};
00044     ButtonGroup aiueo(lcd_, ts_, 430, 15, 50, 40,
00045                       LCD_COLOR_BLUE, backColor,
00046                       5, AIUEO, 0, 10, 1, Font16);
00047 
00048     const string METHOD[3] = {"FFT (Bar)", "FFT (Line)", "LP"};
00049     ButtonGroup method(lcd_, ts_, 340, 15, 80, 40,
00050                        LCD_COLOR_BLUE, backColor,
00051                        3, METHOD, 0, 10, 1, Font12);
00052     uint32_t inActive = backColor & 0xD0FFFFFF;
00053     for (int n=0; n<3; n++) method.Draw(n, inActive, LCD_COLOR_LIGHTGRAY);
00054 
00055     SpectrumDisplay disp(lcd_, N_FFT_, X0_, Y0_, DB1_, BIN_, W_DB, FS_);
00056     bool dataOk = false;
00057     while (true)
00058     {
00059         int vowel;
00060         if (aiueo.GetTouchedNumber(vowel, 0xFF0000B0))
00061         {
00062             for (int n=0; n<N_DATA_; n++) sn[n] = sn_[vowel][n];
00063                 WaveformDisplay(lcd_, 50, 40, sn, N_DATA_, backColor);
00064 
00065             for (int n=0; n<N_DATA_; n++) sn_f[n] = sn[n];
00066             fft_.Execute(sn_f, db1);
00067             lpc_.Execute(sn_f, db2);
00068             dataOk = true;
00069             disp.Clear(backColor);
00070             for (int n=0; n<3; n++) method.Redraw(n);
00071         }
00072 
00073         if (dataOk)
00074         {
00075             int k;
00076             if (method.GetTouchedNumber(k, 0xFF0000B0))
00077             {
00078                 switch (k)
00079                 {
00080                     case 0: disp.BarChart(db1, backColor);
00081                             break;
00082                     case 1: disp.LineChart(db1, backColor);
00083                             break;
00084                     case 2: disp.LineChart(db2, backColor);
00085                             break;
00086                 }   
00087             }
00088         }
00089         wait(0.1);
00090     }
00091 }