不韋 呂 / Mbed 2 deprecated F746_RealtimeSpectrumAnalyzer

Realtime spectrum analyzer. Using FFT, linear prediction, or cepstrum smoothing. Version using MEMS microphone and CODEC, named "F746_RealtimeSpectrumAnalyzer_MEMS_Mic" is registered. リアルタイム スペクトル解析器．解析の手法：FFT，線形予測法，ケプストラムによる平滑化の３種類．このプログラムの説明は，CQ出版社のインターフェース誌，2016年4月号に掲載．外付けのマイクまたは他の信号源等を A0 に接続する．線形予測法，ケプストラムは，スペクトル解析の対象を音声信号に想定してパラメータを設定している．MEMS マイクと CODEC を使ったバージョンを "F746_RealtimeSpectrumAnalyzer_MEMS_Mic" として登録．

Dependencies:   BSP_DISCO_F746NG BUTTON_GROUP LCD_DISCO_F746NG TS_DISCO_F746NG UIT_FFT_Real mbed

main.cpp@3:7c26b701f363, 2015-12-14 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Dec 14 13:44:42 2015 +0000
Revision:
3:7c26b701f363
Parent:
2:095b360e0f54
Child:
4:99d4d5ea06a2
4

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:5c237fdcba23 1 //-----------------------------------------------------------
MikamiUitOpen 0:5c237fdcba23 2 // Realtime spectrum analyzer
MikamiUitOpen 0:5c237fdcba23 3 // Input: A0 (CN5)
MikamiUitOpen 0:5c237fdcba23 4 //
MikamiUitOpen 3:7c26b701f363 5 // 2015/12/14, Copyright (c) 2015 MIKAMI, Naoki
MikamiUitOpen 0:5c237fdcba23 6 //-----------------------------------------------------------
MikamiUitOpen 0:5c237fdcba23 7
MikamiUitOpen 0:5c237fdcba23 8 #include "button_group.hpp"
MikamiUitOpen 1:1656f55c2d5c 9 #include "Sampler.hpp"
MikamiUitOpen 1:1656f55c2d5c 10 #include "WaveformDisplay.hpp"
MikamiUitOpen 0:5c237fdcba23 11 #include "AnalysisSelector.hpp"
MikamiUitOpen 0:5c237fdcba23 12
MikamiUitOpen 0:5c237fdcba23 13 using namespace Mikami;
MikamiUitOpen 0:5c237fdcba23 14
MikamiUitOpen 0:5c237fdcba23 15 int main()
MikamiUitOpen 0:5c237fdcba23 16 {
MikamiUitOpen 2:095b360e0f54 17 const int N_DATA = 260; // number of data to be analyzed
MikamiUitOpen 2:095b360e0f54 18 const int N_FFT = 512; // number of date for FFT
MikamiUitOpen 2:095b360e0f54 19 const int X_WAV = 44; // Origin for waveform of x axis
MikamiUitOpen 2:095b360e0f54 20 const int Y_WAV = 36; // Origin for waveform of y axis
MikamiUitOpen 2:095b360e0f54 21 const int X0 = 40; // Origin for spectrum of x axis
MikamiUitOpen 2:095b360e0f54 22 const int Y0 = 234; // Origin for spectrum of y axis
MikamiUitOpen 2:095b360e0f54 23 const float DB1 = 2.4f; // Pixels for 1 dB
MikamiUitOpen 2:095b360e0f54 24 const int BIN = 1; // Pixels per bin
MikamiUitOpen 2:095b360e0f54 25 const int W_DB = 60; // Width in dB to be displayed
MikamiUitOpen 2:095b360e0f54 26 const int X0_BTN = 340; // Origin for button of x axis
MikamiUitOpen 0:5c237fdcba23 27
MikamiUitOpen 2:095b360e0f54 28 const int FS = 10000; // Sampling frequency: 10 kHz
MikamiUitOpen 0:5c237fdcba23 29
MikamiUitOpen 0:5c237fdcba23 30 const uint32_t BACK_COLOR = 0xFF006A6C; // teal green
MikamiUitOpen 0:5c237fdcba23 31 const uint32_t INACTIVE_COLOR = BACK_COLOR & 0xD0FFFFFF;
MikamiUitOpen 0:5c237fdcba23 32 const uint32_t TOUCHED_COLOR = 0xFF7F7FFF;
MikamiUitOpen 0:5c237fdcba23 33 const uint32_t ORIGINAL_COLOR = 0xFF0068B7;
MikamiUitOpen 0:5c237fdcba23 34 const uint32_t INACTIVE_TEXT_COLOR = LCD_COLOR_GRAY;
MikamiUitOpen 0:5c237fdcba23 35 const uint32_t AXIS_COLOR = 0xFFCCFFFF;
MikamiUitOpen 0:5c237fdcba23 36 const uint32_t LINE_COLOR = LCD_COLOR_CYAN;
MikamiUitOpen 0:5c237fdcba23 37
MikamiUitOpen 2:095b360e0f54 38 LCD_DISCO_F746NG lcd; // Object for LCD display
MikamiUitOpen 2:095b360e0f54 39 TS_DISCO_F746NG ts; // Object for touch pannel
MikamiUitOpen 2:095b360e0f54 40 Sampler input(A0, FS, N_DATA); // Object for sampling
MikamiUitOpen 0:5c237fdcba23 41
MikamiUitOpen 0:5c237fdcba23 42 lcd.Clear(BACK_COLOR);
MikamiUitOpen 0:5c237fdcba23 43
MikamiUitOpen 0:5c237fdcba23 44 // Setting of button group
MikamiUitOpen 0:5c237fdcba23 45 const string RUN_STOP[2] = {"RUN", "STOP"};
MikamiUitOpen 2:095b360e0f54 46 ButtonGroup runStop(lcd, ts, X0_BTN, 10, 60, 40,
MikamiUitOpen 0:5c237fdcba23 47 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:5c237fdcba23 48 2, RUN_STOP, 5, 0, 2);
MikamiUitOpen 0:5c237fdcba23 49 runStop.Draw(1, INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:5c237fdcba23 50
MikamiUitOpen 0:5c237fdcba23 51 const string NORM_INV[2] = {"NORM", "INV"};
MikamiUitOpen 2:095b360e0f54 52 ButtonGroup normInv(lcd, ts, X0_BTN, 65, 60, 40,
MikamiUitOpen 0:5c237fdcba23 53 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:5c237fdcba23 54 2, NORM_INV, 5, 0, 2);
MikamiUitOpen 0:5c237fdcba23 55 normInv.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:5c237fdcba23 56
MikamiUitOpen 0:5c237fdcba23 57 const string METHOD[3] = {"FFT", "Linear Pred.", "Cepstrum"};
MikamiUitOpen 2:095b360e0f54 58 ButtonGroup method(lcd, ts, X0_BTN, 120, 125, 40,
MikamiUitOpen 0:5c237fdcba23 59 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:5c237fdcba23 60 3, METHOD, 0, 5, 1);
MikamiUitOpen 0:5c237fdcba23 61 method.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:5c237fdcba23 62 // End of button group setting
MikamiUitOpen 0:5c237fdcba23 63
MikamiUitOpen 2:095b360e0f54 64 WaveformDisplay waveDisp(lcd, X_WAV, Y_WAV, N_DATA, 10,
MikamiUitOpen 2:095b360e0f54 65 AXIS_COLOR, LINE_COLOR, BACK_COLOR);
MikamiUitOpen 2:095b360e0f54 66
MikamiUitOpen 0:5c237fdcba23 67 SpectrumDisplay disp(lcd, N_FFT, X0, Y0, DB1, BIN, W_DB, FS,
MikamiUitOpen 0:5c237fdcba23 68 AXIS_COLOR, LINE_COLOR, BACK_COLOR);
MikamiUitOpen 0:5c237fdcba23 69 // Linear prediction: order = 14
MikamiUitOpen 0:5c237fdcba23 70 // Cepstral smoothing: lifter length = 50
MikamiUitOpen 2:095b360e0f54 71 Selector selector(disp, method, N_DATA, N_FFT, 14, 50,
MikamiUitOpen 2:095b360e0f54 72 TOUCHED_COLOR);
MikamiUitOpen 0:5c237fdcba23 73
MikamiUitOpen 2:095b360e0f54 74 // Wait for "RUN" button touched
MikamiUitOpen 2:095b360e0f54 75 while (!runStop.Touched(0)) {}
MikamiUitOpen 2:095b360e0f54 76
MikamiUitOpen 2:095b360e0f54 77 // Start spectrum analyzing
MikamiUitOpen 2:095b360e0f54 78 int inv = 0; // 0: "NORM", 1: "INV"
MikamiUitOpen 2:095b360e0f54 79 int select = -1;
MikamiUitOpen 0:5c237fdcba23 80 while (true)
MikamiUitOpen 0:5c237fdcba23 81 {
MikamiUitOpen 2:095b360e0f54 82 int16_t* sn; // pointer of data to be analyzed
MikamiUitOpen 2:095b360e0f54 83
MikamiUitOpen 2:095b360e0f54 84 if (runStop.GetCurrentColor(0) != TOUCHED_COLOR)
MikamiUitOpen 0:5c237fdcba23 85 {
MikamiUitOpen 0:5c237fdcba23 86 if (runStop.Touched(0, TOUCHED_COLOR))
MikamiUitOpen 0:5c237fdcba23 87 {
MikamiUitOpen 2:095b360e0f54 88 input.IntrEnable();
MikamiUitOpen 0:5c237fdcba23 89 for (int n=0; n<3; n++)
MikamiUitOpen 2:095b360e0f54 90 if (n != select) method.Redraw(n);
MikamiUitOpen 2:095b360e0f54 91 normInv.Draw(inv, TOUCHED_COLOR);
MikamiUitOpen 2:095b360e0f54 92 normInv.Redraw(1-inv);
MikamiUitOpen 0:5c237fdcba23 93 }
MikamiUitOpen 2:095b360e0f54 94 if (method.GetTouchedNumber(select, TOUCHED_COLOR))
MikamiUitOpen 2:095b360e0f54 95 selector.Execute(sn, select);
MikamiUitOpen 0:5c237fdcba23 96 }
MikamiUitOpen 0:5c237fdcba23 97
MikamiUitOpen 2:095b360e0f54 98 if (runStop.GetCurrentColor(0) == TOUCHED_COLOR)
MikamiUitOpen 0:5c237fdcba23 99 {
MikamiUitOpen 2:095b360e0f54 100 normInv.GetTouchedNumber(inv, TOUCHED_COLOR);
MikamiUitOpen 2:095b360e0f54 101
MikamiUitOpen 2:095b360e0f54 102 if (input.Filled())
MikamiUitOpen 0:5c237fdcba23 103 {
MikamiUitOpen 2:095b360e0f54 104 sn = input.Get();
MikamiUitOpen 0:5c237fdcba23 105 waveDisp.Execute(sn);
MikamiUitOpen 0:5c237fdcba23 106
MikamiUitOpen 1:1656f55c2d5c 107 // spectrum analysis and display
MikamiUitOpen 2:095b360e0f54 108 selector.Execute(sn, select);
MikamiUitOpen 0:5c237fdcba23 109
MikamiUitOpen 0:5c237fdcba23 110 // Check "STOP" button touched
MikamiUitOpen 0:5c237fdcba23 111 if (runStop.Touched(1, TOUCHED_COLOR))
MikamiUitOpen 2:095b360e0f54 112 normInv.DrawAll(INACTIVE_COLOR,
MikamiUitOpen 2:095b360e0f54 113 INACTIVE_TEXT_COLOR);
MikamiUitOpen 2:095b360e0f54 114 else // Restart sampling
MikamiUitOpen 0:5c237fdcba23 115 {
MikamiUitOpen 2:095b360e0f54 116 input.InvertEnable(inv == 1);
MikamiUitOpen 2:095b360e0f54 117 input.Restart();
MikamiUitOpen 2:095b360e0f54 118 input.IntrEnable();
MikamiUitOpen 0:5c237fdcba23 119 }
MikamiUitOpen 0:5c237fdcba23 120 }
MikamiUitOpen 2:095b360e0f54 121 else
MikamiUitOpen 2:095b360e0f54 122 if (method.GetTouchedNumber(select, TOUCHED_COLOR))
MikamiUitOpen 2:095b360e0f54 123 selector.Execute(sn, select);
MikamiUitOpen 0:5c237fdcba23 124 }
MikamiUitOpen 0:5c237fdcba23 125 }
MikamiUitOpen 0:5c237fdcba23 126 }
MikamiUitOpen 3:7c26b701f363 127