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@1:1656f55c2d5c, 2015-12-10 (annotated)

Committer:
MikamiUitOpen
Date:
Thu Dec 10 04:56:04 2015 +0000
Revision:
1:1656f55c2d5c
Parent:
0:5c237fdcba23
Child:
2:095b360e0f54
2

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 1:1656f55c2d5c 5 // 2015/12/10, 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 const int N_DATA_ = 260;
MikamiUitOpen 0:5c237fdcba23 16
MikamiUitOpen 0:5c237fdcba23 17 Ticker timer_; // for timer interrupt
MikamiUitOpen 0:5c237fdcba23 18 Sampler input_(A0, timer_, N_DATA_);
MikamiUitOpen 0:5c237fdcba23 19
MikamiUitOpen 0:5c237fdcba23 20 // Interrupt service routine for timer
MikamiUitOpen 1:1656f55c2d5c 21 void Isr()
MikamiUitOpen 0:5c237fdcba23 22 {
MikamiUitOpen 0:5c237fdcba23 23 input_.Execute();
MikamiUitOpen 0:5c237fdcba23 24 }
MikamiUitOpen 0:5c237fdcba23 25
MikamiUitOpen 0:5c237fdcba23 26 int main()
MikamiUitOpen 0:5c237fdcba23 27 {
MikamiUitOpen 0:5c237fdcba23 28 const int N_FFT = 512; // number of date for FFT
MikamiUitOpen 0:5c237fdcba23 29 const int X_WAV = 44; // Origin for waveform of x axis
MikamiUitOpen 0:5c237fdcba23 30 const int Y_WAV = 36; // Origin for waveform of y axis
MikamiUitOpen 0:5c237fdcba23 31 const int X0 = 40; // Origin for spectrum of x axis
MikamiUitOpen 0:5c237fdcba23 32 const int Y0 = 234; // Origin for spectrum of y axis
MikamiUitOpen 0:5c237fdcba23 33 const float DB1 = 2.4f; // Pixels for 1 dB
MikamiUitOpen 0:5c237fdcba23 34 const int BIN = 1; // Pixels per bin
MikamiUitOpen 0:5c237fdcba23 35 const int W_DB = 60; // Width in dB to be displayed
MikamiUitOpen 0:5c237fdcba23 36 const int X0_BUTTON = 340; // Origin for button of x axis
MikamiUitOpen 0:5c237fdcba23 37
MikamiUitOpen 0:5c237fdcba23 38 const int FS = 10000; // Sampling frequency: 10 kHz
MikamiUitOpen 0:5c237fdcba23 39 const int TS = 1000000/FS; // Sampling period: 100 micro sec.
MikamiUitOpen 0:5c237fdcba23 40
MikamiUitOpen 0:5c237fdcba23 41 const uint32_t BACK_COLOR = 0xFF006A6C; // teal green
MikamiUitOpen 0:5c237fdcba23 42 const uint32_t INACTIVE_COLOR = BACK_COLOR & 0xD0FFFFFF;
MikamiUitOpen 0:5c237fdcba23 43 const uint32_t TOUCHED_COLOR = 0xFF7F7FFF;
MikamiUitOpen 0:5c237fdcba23 44 const uint32_t ORIGINAL_COLOR = 0xFF0068B7;
MikamiUitOpen 0:5c237fdcba23 45 const uint32_t INACTIVE_TEXT_COLOR = LCD_COLOR_GRAY;
MikamiUitOpen 0:5c237fdcba23 46 const uint32_t AXIS_COLOR = 0xFFCCFFFF;
MikamiUitOpen 0:5c237fdcba23 47 const uint32_t LINE_COLOR = LCD_COLOR_CYAN;
MikamiUitOpen 0:5c237fdcba23 48
MikamiUitOpen 0:5c237fdcba23 49 LCD_DISCO_F746NG lcd; // Object for LCD display
MikamiUitOpen 0:5c237fdcba23 50 TS_DISCO_F746NG ts; // Object for touch pannel
MikamiUitOpen 0:5c237fdcba23 51
MikamiUitOpen 0:5c237fdcba23 52 lcd.Clear(BACK_COLOR);
MikamiUitOpen 0:5c237fdcba23 53
MikamiUitOpen 0:5c237fdcba23 54 // Setting of button group
MikamiUitOpen 0:5c237fdcba23 55 const string RUN_STOP[2] = {"RUN", "STOP"};
MikamiUitOpen 0:5c237fdcba23 56 ButtonGroup runStop(lcd, ts, X0_BUTTON, 10, 60, 40,
MikamiUitOpen 0:5c237fdcba23 57 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:5c237fdcba23 58 2, RUN_STOP, 5, 0, 2);
MikamiUitOpen 0:5c237fdcba23 59 runStop.Draw(1, INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:5c237fdcba23 60
MikamiUitOpen 0:5c237fdcba23 61 const string NORM_INV[2] = {"NORM", "INV"};
MikamiUitOpen 0:5c237fdcba23 62 ButtonGroup normInv(lcd, ts, X0_BUTTON, 65, 60, 40,
MikamiUitOpen 0:5c237fdcba23 63 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:5c237fdcba23 64 2, NORM_INV, 5, 0, 2);
MikamiUitOpen 0:5c237fdcba23 65 normInv.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:5c237fdcba23 66
MikamiUitOpen 0:5c237fdcba23 67 const string METHOD[3] = {"FFT", "Linear Pred.", "Cepstrum"};
MikamiUitOpen 0:5c237fdcba23 68 ButtonGroup method(lcd, ts, X0_BUTTON, 120, 125, 40,
MikamiUitOpen 0:5c237fdcba23 69 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:5c237fdcba23 70 3, METHOD, 0, 5, 1);
MikamiUitOpen 0:5c237fdcba23 71 method.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:5c237fdcba23 72 // End of button group setting
MikamiUitOpen 0:5c237fdcba23 73
MikamiUitOpen 0:5c237fdcba23 74 SpectrumDisplay disp(lcd, N_FFT, X0, Y0, DB1, BIN, W_DB, FS,
MikamiUitOpen 0:5c237fdcba23 75 AXIS_COLOR, LINE_COLOR, BACK_COLOR);
MikamiUitOpen 0:5c237fdcba23 76 // Linear prediction: order = 14
MikamiUitOpen 0:5c237fdcba23 77 // Cepstral smoothing: lifter length = 50
MikamiUitOpen 0:5c237fdcba23 78 Selector selector(disp, method, N_DATA_, N_FFT, 14, 50,
MikamiUitOpen 0:5c237fdcba23 79 TOUCHED_COLOR);
MikamiUitOpen 0:5c237fdcba23 80
MikamiUitOpen 0:5c237fdcba23 81 WaveformDisplay waveDisp(lcd, X_WAV, Y_WAV, N_DATA_, 10,
MikamiUitOpen 0:5c237fdcba23 82 AXIS_COLOR, LINE_COLOR, BACK_COLOR);
MikamiUitOpen 0:5c237fdcba23 83
MikamiUitOpen 0:5c237fdcba23 84 int16_t* sn; // pointer of data to be analyzed
MikamiUitOpen 0:5c237fdcba23 85 bool runSelected = false;
MikamiUitOpen 0:5c237fdcba23 86 int touchedNum = -1;
MikamiUitOpen 0:5c237fdcba23 87 bool inv = false;
MikamiUitOpen 0:5c237fdcba23 88 while (true)
MikamiUitOpen 0:5c237fdcba23 89 {
MikamiUitOpen 0:5c237fdcba23 90 if (!runSelected)
MikamiUitOpen 0:5c237fdcba23 91 {
MikamiUitOpen 0:5c237fdcba23 92 if (runStop.Touched(0, TOUCHED_COLOR))
MikamiUitOpen 0:5c237fdcba23 93 {
MikamiUitOpen 0:5c237fdcba23 94 input_.ClearCount();
MikamiUitOpen 1:1656f55c2d5c 95 timer_.attach_us(&Isr, TS); // Enable timer interrupt
MikamiUitOpen 0:5c237fdcba23 96 runSelected = true;
MikamiUitOpen 0:5c237fdcba23 97 for (int n=0; n<3; n++)
MikamiUitOpen 0:5c237fdcba23 98 if (n != touchedNum) method.Redraw(n);
MikamiUitOpen 0:5c237fdcba23 99 }
MikamiUitOpen 0:5c237fdcba23 100 int touchedNum2 = touchedNum;
MikamiUitOpen 0:5c237fdcba23 101 method.GetTouchedNumber(touchedNum2);
MikamiUitOpen 0:5c237fdcba23 102 if ( (touchedNum != -1) && (touchedNum != touchedNum2) )
MikamiUitOpen 0:5c237fdcba23 103 selector.Execute(sn, touchedNum);
MikamiUitOpen 0:5c237fdcba23 104 }
MikamiUitOpen 0:5c237fdcba23 105
MikamiUitOpen 0:5c237fdcba23 106 if (runSelected)
MikamiUitOpen 0:5c237fdcba23 107 {
MikamiUitOpen 0:5c237fdcba23 108 // "NORM" or "INV"
MikamiUitOpen 0:5c237fdcba23 109 if (normInv.GetCurrentColor(0) == INACTIVE_COLOR)
MikamiUitOpen 0:5c237fdcba23 110 {
MikamiUitOpen 0:5c237fdcba23 111 for (int n=0; n<2; n++) normInv.Redraw(n);
MikamiUitOpen 0:5c237fdcba23 112 if (!inv)
MikamiUitOpen 0:5c237fdcba23 113 normInv.Draw(0, TOUCHED_COLOR);
MikamiUitOpen 0:5c237fdcba23 114 else
MikamiUitOpen 0:5c237fdcba23 115 normInv.Draw(1, TOUCHED_COLOR);
MikamiUitOpen 0:5c237fdcba23 116 }
MikamiUitOpen 0:5c237fdcba23 117
MikamiUitOpen 1:1656f55c2d5c 118 int invButton; // 0: "NORM", 1: "INV"
MikamiUitOpen 1:1656f55c2d5c 119 normInv.GetTouchedNumber(invButton, TOUCHED_COLOR);
MikamiUitOpen 0:5c237fdcba23 120
MikamiUitOpen 0:5c237fdcba23 121 // If input buffer filled, start analysis
MikamiUitOpen 0:5c237fdcba23 122 if (input_.Filled())
MikamiUitOpen 0:5c237fdcba23 123 {
MikamiUitOpen 0:5c237fdcba23 124 sn = input_.Get();
MikamiUitOpen 0:5c237fdcba23 125 waveDisp.Execute(sn);
MikamiUitOpen 0:5c237fdcba23 126
MikamiUitOpen 1:1656f55c2d5c 127 // spectrum analysis and display
MikamiUitOpen 1:1656f55c2d5c 128 selector.Execute(sn, touchedNum);
MikamiUitOpen 0:5c237fdcba23 129
MikamiUitOpen 0:5c237fdcba23 130 // Check "STOP" button touched
MikamiUitOpen 0:5c237fdcba23 131 if (runStop.Touched(1, TOUCHED_COLOR))
MikamiUitOpen 0:5c237fdcba23 132 {
MikamiUitOpen 1:1656f55c2d5c 133 timer_.detach(); // Disable timer interrupt
MikamiUitOpen 0:5c237fdcba23 134 runSelected = false;
MikamiUitOpen 0:5c237fdcba23 135 normInv.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:5c237fdcba23 136 }
MikamiUitOpen 0:5c237fdcba23 137
MikamiUitOpen 0:5c237fdcba23 138 // Restart sampling
MikamiUitOpen 1:1656f55c2d5c 139 inv = (invButton == 0) ? input_.InvertEnable(false)
MikamiUitOpen 1:1656f55c2d5c 140 : input_.InvertEnable(true);
MikamiUitOpen 0:5c237fdcba23 141 input_.Restart();
MikamiUitOpen 1:1656f55c2d5c 142 timer_.attach_us(&Isr, TS); // Enable timer interrupt
MikamiUitOpen 0:5c237fdcba23 143 }
MikamiUitOpen 0:5c237fdcba23 144 }
MikamiUitOpen 0:5c237fdcba23 145 }
MikamiUitOpen 0:5c237fdcba23 146 }