Final version.
Dependencies: F746_GUI F746_SAI_IO UIT_FFT_Real
Fork of F746_Spectrogram by
main.cpp
- Committer:
- mladjo1993
- Date:
- 2017-08-30
- Revision:
- 8:99d57d6e0ea1
- Parent:
- 7:23b60827582d
File content as of revision 8:99d57d6e0ea1:
/******************************************************** * Real time spectrogram * Input: MEMS microphone * * Mladen Adamovic, 3326/2016 ********************************************************/ #include "SAI_InOut.hpp" #include "F746_GUI.hpp" #include "MethodCollection.hpp" using namespace etf; //typedef enum {2D,3D} int main() { const int FS = AUDIO_FREQUENCY_16K; // Sampling frequency: 16 kHz const int N_FFT = 512; // FFT score SaiIO mySai(SaiIO::INPUT, N_FFT+1, FS, // Use with force INPUT_DEVICE_DIGITAL_MICROPHONE_2); // Input device: MEMS microphone LCD_DISCO_F746NG &lcd = GuiBase::GetLcd(); // Obtain reference of object of LCD display lcd.Clear(GuiBase::ENUM_BACK); Label myLabel1(240, 2, "Real-time spectrogram", Label::CENTER, Font16); // Set ButtonGroup const uint16_t B_W = 50; const uint16_t B_Y = 242; const uint16_t B_H = 30; const string RUN_STOP[3] = {"2D","3D", "STOP"}; ButtonGroup runStop(275, B_Y, B_W, B_H, 3, RUN_STOP, 0, 0, 3, 2); Button clearButton(430, B_Y, B_W, B_H, "CLEAR"); clearButton.Inactivate(); // Coordinate axis const uint16_t X0 = 40; // The origin of the x coordinate of the display area const uint16_t Y0 = 200; // The origin of the y coordinate of the display area const uint16_t PX_1KHZ = 32; // Number of pixels corresponding to 1 kHz - 3D view const uint16_t PX_20dB = 20; // Number of pixels corresponding to 20 dB - 2D view const uint16_t H0 = PX_1KHZ*5; // Number of pixels corresponding to the length of the frequency axis (corresponding to 5 kHz) const uint16_t W0_3D = 360; // Width in the horizontal direction 3D (unit: pixels) const uint16_t W0_2D = 384; // Width in the horizontal direction 2D (unit: pixels) const float FRAME = (N_FFT/(float)FS)*1000.0f; // Time corresponding to one frame (unit: ms) const uint16_t H_BAR = 2; // The number of pixels in the horizontal direction corresponding to one frame when displaying const uint16_t MS100 = 100*H_BAR/FRAME; // Number of pixels corresponding to 100 ms 3D const float Hz100 = 6.4; // Number of pixels corresponding to 100 hz 2D const uint32_t AXIS_COLOR = LCD_COLOR_WHITE; DrawAxis2D(X0, Y0, W0_2D, H0, AXIS_COLOR, Hz100, PX_20dB, lcd); Array<float> sn(N_FFT+1); // Buffer for storing signals for spectrum analysis Array<float> db(N_FFT/2+1); // A buffer storing the calculated log spectrum // Two-dimensional array that stores color data corresponding to the size of spectrum Matrix<uint32_t> spectra(W0_3D/H_BAR, H0+1, GuiBase::ENUM_BACK); FftAnalyzer fftAnalyzer(N_FFT+1, N_FFT); // Initialization of variable used in loop int stop = 0; // 0: run, 1: stop int screen = 0; // 0: 2D, 1: 3D while(!runStop.Touched(0) && !runStop.Touched(1)) {} // Wait till you touch "2D" or "3D" // Start reading data mySai.RecordIn(); while(!mySai.IsCaptured()) {} while (true) { runStop.GetTouchedNumber(stop); switch(stop){ case 0: clearButton.Inactivate(); if (screen == 1) { // Clear relationship between color and dB ClearColorDb(Y0, AXIS_COLOR, lcd); // Draw 2D axis DrawAxis2D(X0, Y0, W0_2D, H0, AXIS_COLOR, Hz100, PX_20dB, lcd); // Screen - 2D screen = 0; } if (mySai.IsCaptured()) { // Input of signal for one frame for (int n=0; n<mySai.GetLength(); n++) { int16_t xL, xR; mySai.Input(xL, xR); sn[n] = (float)xL; } // Spectrum update SpectrumUpdate(spectra, fftAnalyzer, sn, db); // Display 2D spectrum DisplaySpectrum2D(db, X0, Y0, W0_2D/H_BAR, H_BAR, lcd); } break; case 1: clearButton.Inactivate(); if (screen == 0) { // Draw relationship between color and dB DrawColorDb(Y0, AXIS_COLOR, lcd); // Draw 3D axis DrawAxis3D(X0, Y0, W0_3D, H0, AXIS_COLOR, MS100, PX_1KHZ, lcd); // Screen - 3D screen = 1; } if (mySai.IsCaptured()) { // Input of signal for one frame for (int n=0; n<mySai.GetLength(); n++) { int16_t xL, xR; mySai.Input(xL, xR); sn[n] = (float)xL; } // Spectrum update SpectrumUpdate(spectra, fftAnalyzer, sn, db); // Display spectrum DisplaySpectrum3D(spectra, X0, Y0, H_BAR, lcd); } break; case 2: clearButton.Activate(); if (clearButton.Touched()) { if (screen == 1) { spectra.Fill(GuiBase::ENUM_BACK); // Process for clearing the spectrum display DisplaySpectrum3D(spectra, X0, Y0, H_BAR, lcd); // Clear spectrum display } else ClearDisplay(X0, Y0, W0_2D, H0+1, lcd); clearButton.Draw(); } break; } } }