不韋 呂 / Mbed 2 deprecated F746_RealtimeSpectrumAnalyzer_MEMS_Mic

Version using MEMS microphone and CODEC for the program "F746_RealtimeSpectrumAnalyzer". "F746_RealtimeSpectrumAnalyzer" の入力を MEMS のマイクと CODEC に変更．このプログラムは Tomona Nanase さんが作成し DISCO-F746NG_Oscilloscope の名前で登録しているプログラムで， CODEC を使って入力する部分を参考にして作成．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．

Dependencies:   BSP_DISCO_F746NG BUTTON_GROUP LCD_DISCO_F746NG TS_DISCO_F746NG UIT_FFT_Real mbed

main.cpp@8:e7dc8658c5cd, 2016-04-19 (annotated)

Committer:
MikamiUitOpen
Date:
Tue Apr 19 09:35:24 2016 +0000
Revision:
8:e7dc8658c5cd
Parent:
7:f863d0a84d11 
9

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:0e5131366580 1 //------------------------------------------------
MikamiUitOpen 0:0e5131366580 2 // Realtime spectrum analyzer
MikamiUitOpen 0:0e5131366580 3 // Input: MEMS microphone or CN11
MikamiUitOpen 0:0e5131366580 4 //
MikamiUitOpen 8:e7dc8658c5cd 5 // 2016/04/19, Copyright (c) 2016 MIKAMI, Naoki
MikamiUitOpen 0:0e5131366580 6 //------------------------------------------------
MikamiUitOpen 0:0e5131366580 7
MikamiUitOpen 0:0e5131366580 8 #include "main.h"
MikamiUitOpen 0:0e5131366580 9
MikamiUitOpen 0:0e5131366580 10 using namespace Mikami;
MikamiUitOpen 0:0e5131366580 11
MikamiUitOpen 0:0e5131366580 12 int16_t audio_in_buffer[BufferSize];
MikamiUitOpen 0:0e5131366580 13 __IO bool audio_in_buffer_captured = false;
MikamiUitOpen 0:0e5131366580 14 __IO int32_t audio_in_buffer_offset = 0;
MikamiUitOpen 0:0e5131366580 15 __IO int32_t audio_in_buffer_length = 0;
MikamiUitOpen 0:0e5131366580 16
MikamiUitOpen 3:a6df3a2de219 17 // Switching input device
MikamiUitOpen 3:a6df3a2de219 18 void SwitchInputDevice(int sw)
MikamiUitOpen 3:a6df3a2de219 19 {
MikamiUitOpen 3:a6df3a2de219 20 uint16_t dev = (sw == 0) ? INPUT_DEVICE_DIGITAL_MICROPHONE_2
MikamiUitOpen 3:a6df3a2de219 21 : INPUT_DEVICE_INPUT_LINE_1;
MikamiUitOpen 3:a6df3a2de219 22 InitRunAudioIn(dev, I2S_AUDIOFREQ_16K);
MikamiUitOpen 3:a6df3a2de219 23 }
MikamiUitOpen 3:a6df3a2de219 24
MikamiUitOpen 0:0e5131366580 25 int main()
MikamiUitOpen 0:0e5131366580 26 {
MikamiUitOpen 0:0e5131366580 27 const int FS = 8000; // Sampling frequency: 8 kHz
MikamiUitOpen 0:0e5131366580 28 const int N_DATA = N_DATA_; // Number of data to be analyzed
MikamiUitOpen 0:0e5131366580 29 const int N_FFT = 512; // Number of date for FFT
MikamiUitOpen 0:0e5131366580 30
MikamiUitOpen 0:0e5131366580 31 const int X_WAV = 44; // Origin for x axis of waveform
MikamiUitOpen 0:0e5131366580 32 const int Y_WAV = 36; // Origin for y axis of waveform
MikamiUitOpen 0:0e5131366580 33 const int X0 = 40; // Origin for x axis of spectrum
MikamiUitOpen 0:0e5131366580 34 const int Y0 = 234; // Origin for y axis of spectrum
MikamiUitOpen 0:0e5131366580 35 const float DB1 = 2.4f; // Pixels for 1 dB
MikamiUitOpen 0:0e5131366580 36 const int BIN = 1; // Pixels per bin
MikamiUitOpen 0:0e5131366580 37 const int W_DB = 60; // Range in dB to be displayed
MikamiUitOpen 0:0e5131366580 38 const int X0_BTN = 340; // Holizontal position for left of buttons
MikamiUitOpen 0:0e5131366580 39
MikamiUitOpen 0:0e5131366580 40 const uint32_t BACK_COLOR = 0xFF006A6C; // Teal green
MikamiUitOpen 0:0e5131366580 41 const uint32_t INACTIVE_COLOR = BACK_COLOR & 0xD0FFFFFF;
MikamiUitOpen 0:0e5131366580 42 const uint32_t TOUCHED_COLOR = 0xFF7F7FFF;
MikamiUitOpen 0:0e5131366580 43 const uint32_t ORIGINAL_COLOR = 0xFF0068B7;
MikamiUitOpen 0:0e5131366580 44 const uint32_t INACTIVE_TEXT_COLOR = LCD_COLOR_GRAY;
MikamiUitOpen 0:0e5131366580 45 const uint32_t AXIS_COLOR = 0xFFCCFFFF;
MikamiUitOpen 0:0e5131366580 46 const uint32_t LINE_COLOR = LCD_COLOR_CYAN;
MikamiUitOpen 0:0e5131366580 47
MikamiUitOpen 0:0e5131366580 48 LCD_DISCO_F746NG lcd; // Object for LCD display
MikamiUitOpen 0:0e5131366580 49 TS_DISCO_F746NG ts; // Object for touch pannel
MikamiUitOpen 0:0e5131366580 50
MikamiUitOpen 0:0e5131366580 51 lcd.Clear(BACK_COLOR);
MikamiUitOpen 0:0e5131366580 52
MikamiUitOpen 0:0e5131366580 53 // Setting of button group
MikamiUitOpen 0:0e5131366580 54 const string RUN_STOP[2] = {"RUN", "STOP"};
MikamiUitOpen 0:0e5131366580 55 ButtonGroup runStop(lcd, ts, X0_BTN, 10, 60, 40,
MikamiUitOpen 0:0e5131366580 56 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:0e5131366580 57 2, RUN_STOP, 5, 0, 2);
MikamiUitOpen 0:0e5131366580 58 runStop.Draw(1, INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:0e5131366580 59
MikamiUitOpen 0:0e5131366580 60 const string MIC_LINE[2] = {"MIC", "LINE"};
MikamiUitOpen 0:0e5131366580 61 ButtonGroup micLine(lcd, ts, X0_BTN, 65, 60, 40,
MikamiUitOpen 0:0e5131366580 62 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:0e5131366580 63 2, MIC_LINE, 5, 0, 2);
MikamiUitOpen 0:0e5131366580 64 micLine.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:0e5131366580 65
MikamiUitOpen 0:0e5131366580 66 const string METHOD[3] = {"FFT", "Linear Pred.", "Cepstrum"};
MikamiUitOpen 0:0e5131366580 67 ButtonGroup method(lcd, ts, X0_BTN, 120, 125, 40,
MikamiUitOpen 0:0e5131366580 68 ORIGINAL_COLOR, BACK_COLOR,
MikamiUitOpen 0:0e5131366580 69 3, METHOD, 0, 5, 1);
MikamiUitOpen 0:0e5131366580 70 method.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:0e5131366580 71 // End of button group setting
MikamiUitOpen 0:0e5131366580 72
MikamiUitOpen 1:ac0a67a0deec 73 WaveformDisplay waveDisp(lcd, X_WAV, Y_WAV, N_DATA, 9,
MikamiUitOpen 0:0e5131366580 74 AXIS_COLOR, LINE_COLOR, BACK_COLOR);
MikamiUitOpen 0:0e5131366580 75
MikamiUitOpen 3:a6df3a2de219 76 SpectrumDisplay disp(lcd, N_FFT, X0, Y0, -45, DB1, BIN, W_DB, FS,
MikamiUitOpen 0:0e5131366580 77 AXIS_COLOR, LINE_COLOR, BACK_COLOR);
MikamiUitOpen 1:ac0a67a0deec 78 // Linear prediction: order = 10
MikamiUitOpen 0:0e5131366580 79 // Cepstral smoothing: highest quefrency = 40
MikamiUitOpen 1:ac0a67a0deec 80 Selector analyzer(disp, N_DATA, N_FFT, 10, 40);
MikamiUitOpen 0:0e5131366580 81
MikamiUitOpen 0:0e5131366580 82 // Initialize the infinite loop procedure
MikamiUitOpen 0:0e5131366580 83 int select = -1;
MikamiUitOpen 3:a6df3a2de219 84 int sw = 0; // 0: mic, 1: line
MikamiUitOpen 0:0e5131366580 85 int stop = 0;
MikamiUitOpen 0:0e5131366580 86 int16_t sn[N_DATA];
MikamiUitOpen 0:0e5131366580 87
MikamiUitOpen 0:0e5131366580 88 // Wait for "RUN" button touched
MikamiUitOpen 0:0e5131366580 89 while (!runStop.Touched(0, TOUCHED_COLOR)) {}
MikamiUitOpen 0:0e5131366580 90
MikamiUitOpen 0:0e5131366580 91 // Start of spectrum analyzing
MikamiUitOpen 0:0e5131366580 92 method.DrawAll(ORIGINAL_COLOR);
MikamiUitOpen 0:0e5131366580 93
MikamiUitOpen 0:0e5131366580 94 while (true)
MikamiUitOpen 0:0e5131366580 95 {
MikamiUitOpen 0:0e5131366580 96 if (runStop.Touched(0, TOUCHED_COLOR))
MikamiUitOpen 0:0e5131366580 97 {
MikamiUitOpen 3:a6df3a2de219 98 SwitchInputDevice(sw);
MikamiUitOpen 3:a6df3a2de219 99 micLine.Draw(sw, TOUCHED_COLOR);
MikamiUitOpen 3:a6df3a2de219 100 micLine.Redraw(1-sw);
MikamiUitOpen 0:0e5131366580 101 }
MikamiUitOpen 0:0e5131366580 102
MikamiUitOpen 0:0e5131366580 103 runStop.GetTouchedNumber(stop, TOUCHED_COLOR);
MikamiUitOpen 0:0e5131366580 104 if (stop == 0)
MikamiUitOpen 0:0e5131366580 105 {
MikamiUitOpen 3:a6df3a2de219 106 if (micLine.GetTouchedNumber(sw, TOUCHED_COLOR))
MikamiUitOpen 3:a6df3a2de219 107 SwitchInputDevice(sw);
MikamiUitOpen 0:0e5131366580 108
MikamiUitOpen 0:0e5131366580 109 if (audio_in_buffer_captured)
MikamiUitOpen 0:0e5131366580 110 {
MikamiUitOpen 0:0e5131366580 111 // Waveform display
MikamiUitOpen 0:0e5131366580 112 int32_t index = audio_in_buffer_offset; // right mic. or left line
MikamiUitOpen 0:0e5131366580 113 // int32_t index = audio_in_buffer_offset + 1; // left mic. or right line
MikamiUitOpen 0:0e5131366580 114 Decimate(N_DATA, index, audio_in_buffer, sn);
MikamiUitOpen 0:0e5131366580 115 waveDisp.Execute(sn);
MikamiUitOpen 0:0e5131366580 116 // Spectrum analysis and display
MikamiUitOpen 0:0e5131366580 117 analyzer.Execute(sn, select);
MikamiUitOpen 0:0e5131366580 118 audio_in_buffer_captured = false;
MikamiUitOpen 0:0e5131366580 119 }
MikamiUitOpen 0:0e5131366580 120 else
MikamiUitOpen 0:0e5131366580 121 if (method.GetTouchedNumber(select, TOUCHED_COLOR))
MikamiUitOpen 0:0e5131366580 122 analyzer.Execute(sn, select);
MikamiUitOpen 0:0e5131366580 123 }
MikamiUitOpen 0:0e5131366580 124 else
MikamiUitOpen 0:0e5131366580 125 {
MikamiUitOpen 0:0e5131366580 126 if (runStop.Touched(1))
MikamiUitOpen 0:0e5131366580 127 {
MikamiUitOpen 0:0e5131366580 128 StopAudioIn(); // Stop sampling
MikamiUitOpen 0:0e5131366580 129 micLine.DrawAll(INACTIVE_COLOR, INACTIVE_TEXT_COLOR);
MikamiUitOpen 0:0e5131366580 130 }
MikamiUitOpen 0:0e5131366580 131 if (method.GetTouchedNumber(select, TOUCHED_COLOR))
MikamiUitOpen 0:0e5131366580 132 analyzer.Execute(sn, select);
MikamiUitOpen 0:0e5131366580 133 }
MikamiUitOpen 0:0e5131366580 134 }
MikamiUitOpen 0:0e5131366580 135 }