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@11:a8420871920e, 2015-12-31 (annotated)

Committer:
MikamiUitOpen
Date:
Thu Dec 31 12:03:06 2015 +0000
Revision:
11:a8420871920e
Parent:
10:351d70a4efde
Child:
13:92ac49e48697
12

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 10:351d70a4efde 5 // 2015/12/31, Copyright (c) 2015 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 11:a8420871920e 16 printf("\r\n20:12");
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 8:1f4bc859bc84 19 const int X_WAV = 44; // Origin for x axis of waveform
MikamiUitOpen 8:1f4bc859bc84 20 const int Y_WAV = 36; // Origin for y axis of waveform
MikamiUitOpen 8:1f4bc859bc84 21 const int X0 = 40; // Origin for x axis of spectrum
MikamiUitOpen 8:1f4bc859bc84 22 const int Y0 = 234; // Origin for y axis of spectrum
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 8:1f4bc859bc84 25 const int W_DB = 60; // Range in dB to be displayed
MikamiUitOpen 8:1f4bc859bc84 26 const int X0_BTN = 340; // Holizontal position for left of buttons
MikamiUitOpen 0:5c237fdcba23 27
MikamiUitOpen 2:095b360e0f54 28 const int FS = 10000; // Sampling frequency: 10 kHz
MikamiUitOpen 0:5c237fdcba23 29
MikamiUitOpen 8:1f4bc859bc84 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 7:6598a9b70e5a 37
MikamiUitOpen 7:6598a9b70e5a 38 LCD_DISCO_F746NG lcd; // Object for LCD display
MikamiUitOpen 7:6598a9b70e5a 39 TS_DISCO_F746NG ts; // Object for touch pannel
MikamiUitOpen 7:6598a9b70e5a 40 Sampler input(A0, FS, N_DATA); // Object for sampling
MikamiUitOpen 8:1f4bc859bc84 41 int16_t* sn = input.Get(); // Input data
MikamiUitOpen 0:5c237fdcba23 42
MikamiUitOpen 0:5c237fdcba23 43 lcd.Clear(BACK_COLOR);
MikamiUitOpen 0:5c237fdcba23 44
MikamiUitOpen 0:5c237fdcba23 45 // Setting of button group
MikamiUitOpen 0:5c237fdcba23 46 const string RUN_STOP[2] = {"RUN", "STOP"};
MikamiUitOpen 2:095b360e0f54 47 ButtonGroup runStop(lcd, ts, X0_BTN, 10, 60, 40,
MikamiUitOpen 0:5c237fdcba23 48 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:5c237fdcba23 49 2, RUN_STOP, 5, 0, 2);
MikamiUitOpen 0:5c237fdcba23 50 runStop.Draw(1, INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:5c237fdcba23 51
MikamiUitOpen 0:5c237fdcba23 52 const string NORM_INV[2] = {"NORM", "INV"};
MikamiUitOpen 2:095b360e0f54 53 ButtonGroup normInv(lcd, ts, X0_BTN, 65, 60, 40,
MikamiUitOpen 0:5c237fdcba23 54 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:5c237fdcba23 55 2, NORM_INV, 5, 0, 2);
MikamiUitOpen 0:5c237fdcba23 56 normInv.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:5c237fdcba23 57
MikamiUitOpen 0:5c237fdcba23 58 const string METHOD[3] = {"FFT", "Linear Pred.", "Cepstrum"};
MikamiUitOpen 2:095b360e0f54 59 ButtonGroup method(lcd, ts, X0_BTN, 120, 125, 40,
MikamiUitOpen 0:5c237fdcba23 60 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:5c237fdcba23 61 3, METHOD, 0, 5, 1);
MikamiUitOpen 0:5c237fdcba23 62 method.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:5c237fdcba23 63 // End of button group setting
MikamiUitOpen 0:5c237fdcba23 64
MikamiUitOpen 2:095b360e0f54 65 WaveformDisplay waveDisp(lcd, X_WAV, Y_WAV, N_DATA, 10,
MikamiUitOpen 2:095b360e0f54 66 AXIS_COLOR, LINE_COLOR, BACK_COLOR);
MikamiUitOpen 2:095b360e0f54 67
MikamiUitOpen 0:5c237fdcba23 68 SpectrumDisplay disp(lcd, N_FFT, X0, Y0, DB1, BIN, W_DB, FS,
MikamiUitOpen 0:5c237fdcba23 69 AXIS_COLOR, LINE_COLOR, BACK_COLOR);
MikamiUitOpen 0:5c237fdcba23 70 // Linear prediction: order = 14
MikamiUitOpen 10:351d70a4efde 71 // Cepstral smoothing: highest quefrency = 50
MikamiUitOpen 9:99c55850cb41 72 Selector analyzer(disp, N_DATA, N_FFT, 14, 50);
MikamiUitOpen 0:5c237fdcba23 73
MikamiUitOpen 2:095b360e0f54 74 // Wait for "RUN" button touched
MikamiUitOpen 10:351d70a4efde 75 while (!runStop.Touched(0, TOUCHED_COLOR)) {}
MikamiUitOpen 2:095b360e0f54 76
MikamiUitOpen 6:b27ef8d98edc 77 // Start of spectrum analyzing
MikamiUitOpen 10:351d70a4efde 78 method.DrawAll(ORIGINAL_COLOR);
MikamiUitOpen 5:98ec9dd54144 79 int inv = 0; // 0: "NORM", 1: "INV"
MikamiUitOpen 2:095b360e0f54 80 int select = -1;
MikamiUitOpen 10:351d70a4efde 81 int stop = 0;
MikamiUitOpen 11:a8420871920e 82 // input.Start(inv == 1);
MikamiUitOpen 10:351d70a4efde 83
MikamiUitOpen 0:5c237fdcba23 84 while (true)
MikamiUitOpen 7:6598a9b70e5a 85 {
MikamiUitOpen 11:a8420871920e 86 // runStop.GetTouchedNumber(stop, TOUCHED_COLOR);
MikamiUitOpen 11:a8420871920e 87 if (runStop.GetTouchedNumber(stop, TOUCHED_COLOR))
MikamiUitOpen 11:a8420871920e 88 if (stop == 0) input.Start(inv == 1);
MikamiUitOpen 10:351d70a4efde 89 if (stop == 0)
MikamiUitOpen 0:5c237fdcba23 90 {
MikamiUitOpen 2:095b360e0f54 91 normInv.GetTouchedNumber(inv, TOUCHED_COLOR);
MikamiUitOpen 10:351d70a4efde 92 normInv.Draw(inv, TOUCHED_COLOR);
MikamiUitOpen 10:351d70a4efde 93 normInv.Redraw(1-inv);
MikamiUitOpen 2:095b360e0f54 94 if (input.Filled())
MikamiUitOpen 0:5c237fdcba23 95 {
MikamiUitOpen 7:6598a9b70e5a 96 // Restart
MikamiUitOpen 8:1f4bc859bc84 97 input.Start(inv == 1);
MikamiUitOpen 0:5c237fdcba23 98
MikamiUitOpen 7:6598a9b70e5a 99 // Waveform display
MikamiUitOpen 7:6598a9b70e5a 100 waveDisp.Execute(sn);
MikamiUitOpen 7:6598a9b70e5a 101 // Spectrum analysis and display
MikamiUitOpen 8:1f4bc859bc84 102 analyzer.Execute(sn, select);
MikamiUitOpen 0:5c237fdcba23 103 }
MikamiUitOpen 2:095b360e0f54 104 else
MikamiUitOpen 2:095b360e0f54 105 if (method.GetTouchedNumber(select, TOUCHED_COLOR))
MikamiUitOpen 8:1f4bc859bc84 106 analyzer.Execute(sn, select);
MikamiUitOpen 10:351d70a4efde 107 }
MikamiUitOpen 10:351d70a4efde 108 else
MikamiUitOpen 10:351d70a4efde 109 {
MikamiUitOpen 11:a8420871920e 110 input.Stop();
MikamiUitOpen 7:6598a9b70e5a 111 // Check "STOP" button touched
MikamiUitOpen 11:a8420871920e 112 //// if (runStop.Touched(1, TOUCHED_COLOR))
MikamiUitOpen 11:a8420871920e 113 normInv.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 10:351d70a4efde 114 if (method.GetTouchedNumber(select, TOUCHED_COLOR))
MikamiUitOpen 10:351d70a4efde 115 analyzer.Execute(sn, select);
MikamiUitOpen 0:5c237fdcba23 116 }
MikamiUitOpen 0:5c237fdcba23 117 }
MikamiUitOpen 0:5c237fdcba23 118 }