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@17:b74b1d99a8c1, 2016-02-17 (annotated)

Committer:
MikamiUitOpen
Date:
Wed Feb 17 06:33:10 2016 +0000
Revision:
17:b74b1d99a8c1
Parent:
15:a490686fce1e
Child:
18:6630d61aeb3c
18

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 6:b27ef8d98edc 1 //------------------------------------------------
MikamiUitOpen 0:5c237fdcba23 2 // Realtime spectrum analyzer
MikamiUitOpen 0:5c237fdcba23 3 // Input: A0 (CN5)
MikamiUitOpen 0:5c237fdcba23 4 //
MikamiUitOpen 17:b74b1d99a8c1 5 // 2016/02/17, Copyright (c) 2016 MIKAMI, Naoki
MikamiUitOpen 6:b27ef8d98edc 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 using namespace Mikami;
MikamiUitOpen 0:5c237fdcba23 13
MikamiUitOpen 0:5c237fdcba23 14 int main()
MikamiUitOpen 0:5c237fdcba23 15 {
MikamiUitOpen 15:a490686fce1e 16 const int FS = 10000; // Sampling frequency: 10 kHz
MikamiUitOpen 8:1f4bc859bc84 17 const int N_DATA = 260; // Number of data to be analyzed
MikamiUitOpen 8:1f4bc859bc84 18 const int N_FFT = 512; // Number of date for FFT
MikamiUitOpen 15:a490686fce1e 19
MikamiUitOpen 8:1f4bc859bc84 20 const int X_WAV = 44; // Origin for x axis of waveform
MikamiUitOpen 8:1f4bc859bc84 21 const int Y_WAV = 36; // Origin for y axis of waveform
MikamiUitOpen 8:1f4bc859bc84 22 const int X0 = 40; // Origin for x axis of spectrum
MikamiUitOpen 8:1f4bc859bc84 23 const int Y0 = 234; // Origin for y axis of spectrum
MikamiUitOpen 2:095b360e0f54 24 const float DB1 = 2.4f; // Pixels for 1 dB
MikamiUitOpen 2:095b360e0f54 25 const int BIN = 1; // Pixels per bin
MikamiUitOpen 8:1f4bc859bc84 26 const int W_DB = 60; // Range in dB to be displayed
MikamiUitOpen 8:1f4bc859bc84 27 const int X0_BTN = 340; // Holizontal position for left of buttons
MikamiUitOpen 0:5c237fdcba23 28
MikamiUitOpen 8:1f4bc859bc84 29 const uint32_t BACK_COLOR = 0xFF006A6C; // Teal green
MikamiUitOpen 0:5c237fdcba23 30 const uint32_t INACTIVE_COLOR = BACK_COLOR & 0xD0FFFFFF;
MikamiUitOpen 0:5c237fdcba23 31 const uint32_t TOUCHED_COLOR = 0xFF7F7FFF;
MikamiUitOpen 0:5c237fdcba23 32 const uint32_t ORIGINAL_COLOR = 0xFF0068B7;
MikamiUitOpen 0:5c237fdcba23 33 const uint32_t INACTIVE_TEXT_COLOR = LCD_COLOR_GRAY;
MikamiUitOpen 0:5c237fdcba23 34 const uint32_t AXIS_COLOR = 0xFFCCFFFF;
MikamiUitOpen 0:5c237fdcba23 35 const uint32_t LINE_COLOR = LCD_COLOR_CYAN;
MikamiUitOpen 7:6598a9b70e5a 36
MikamiUitOpen 7:6598a9b70e5a 37 LCD_DISCO_F746NG lcd; // Object for LCD display
MikamiUitOpen 7:6598a9b70e5a 38 TS_DISCO_F746NG ts; // Object for touch pannel
MikamiUitOpen 7:6598a9b70e5a 39 Sampler input(A0, FS, N_DATA); // Object for sampling
MikamiUitOpen 8:1f4bc859bc84 40 int16_t* sn = input.Get(); // Input data
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 10:351d70a4efde 70 // Cepstral smoothing: highest quefrency = 50
MikamiUitOpen 9:99c55850cb41 71 Selector analyzer(disp, N_DATA, N_FFT, 14, 50);
MikamiUitOpen 0:5c237fdcba23 72
MikamiUitOpen 2:095b360e0f54 73 // Wait for "RUN" button touched
MikamiUitOpen 10:351d70a4efde 74 while (!runStop.Touched(0, TOUCHED_COLOR)) {}
MikamiUitOpen 2:095b360e0f54 75
MikamiUitOpen 6:b27ef8d98edc 76 // Start of spectrum analyzing
MikamiUitOpen 10:351d70a4efde 77 method.DrawAll(ORIGINAL_COLOR);
MikamiUitOpen 5:98ec9dd54144 78 int inv = 0; // 0: "NORM", 1: "INV"
MikamiUitOpen 2:095b360e0f54 79 int select = -1;
MikamiUitOpen 10:351d70a4efde 80
MikamiUitOpen 0:5c237fdcba23 81 while (true)
MikamiUitOpen 7:6598a9b70e5a 82 {
MikamiUitOpen 14:cd4534fb34e7 83 if (runStop.Touched(0))
MikamiUitOpen 15:a490686fce1e 84 {
MikamiUitOpen 14:cd4534fb34e7 85 input.Start(inv == 1);
MikamiUitOpen 15:a490686fce1e 86 normInv.Draw(inv, TOUCHED_COLOR);
MikamiUitOpen 15:a490686fce1e 87 normInv.Redraw(1-inv);
MikamiUitOpen 15:a490686fce1e 88 }
MikamiUitOpen 15:a490686fce1e 89
MikamiUitOpen 15:a490686fce1e 90 int stop;
MikamiUitOpen 14:cd4534fb34e7 91 runStop.GetTouchedNumber(stop, TOUCHED_COLOR);
MikamiUitOpen 10:351d70a4efde 92 if (stop == 0)
MikamiUitOpen 0:5c237fdcba23 93 {
MikamiUitOpen 2:095b360e0f54 94 normInv.GetTouchedNumber(inv, TOUCHED_COLOR);
MikamiUitOpen 15:a490686fce1e 95
MikamiUitOpen 2:095b360e0f54 96 if (input.Filled())
MikamiUitOpen 0:5c237fdcba23 97 {
MikamiUitOpen 7:6598a9b70e5a 98 // Restart
MikamiUitOpen 8:1f4bc859bc84 99 input.Start(inv == 1);
MikamiUitOpen 0:5c237fdcba23 100
MikamiUitOpen 7:6598a9b70e5a 101 // Waveform display
MikamiUitOpen 7:6598a9b70e5a 102 waveDisp.Execute(sn);
MikamiUitOpen 7:6598a9b70e5a 103 // Spectrum analysis and display
MikamiUitOpen 8:1f4bc859bc84 104 analyzer.Execute(sn, select);
MikamiUitOpen 0:5c237fdcba23 105 }
MikamiUitOpen 2:095b360e0f54 106 else
MikamiUitOpen 2:095b360e0f54 107 if (method.GetTouchedNumber(select, TOUCHED_COLOR))
MikamiUitOpen 8:1f4bc859bc84 108 analyzer.Execute(sn, select);
MikamiUitOpen 10:351d70a4efde 109 }
MikamiUitOpen 10:351d70a4efde 110 else
MikamiUitOpen 10:351d70a4efde 111 {
MikamiUitOpen 12:e5367ab82460 112 if (runStop.Touched(1))
MikamiUitOpen 15:a490686fce1e 113 {
MikamiUitOpen 15:a490686fce1e 114 input.Stop(); // Stop timer interrupt
MikamiUitOpen 7:6598a9b70e5a 115 normInv.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 15:a490686fce1e 116 }
MikamiUitOpen 10:351d70a4efde 117 if (method.GetTouchedNumber(select, TOUCHED_COLOR))
MikamiUitOpen 10:351d70a4efde 118 analyzer.Execute(sn, select);
MikamiUitOpen 0:5c237fdcba23 119 }
MikamiUitOpen 0:5c237fdcba23 120 }
MikamiUitOpen 0:5c237fdcba23 121 }