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

MyClasses/SpectrumDisplay.hpp@0:5c237fdcba23, 2015-12-09 (annotated)

Committer:
MikamiUitOpen
Date:
Wed Dec 09 05:05:00 2015 +0000
Revision:
0:5c237fdcba23
Child:
4:99d4d5ea06a2
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:5c237fdcba23 1 //-------------------------------------------------------
MikamiUitOpen 0:5c237fdcba23 2 // Class for display spectrum (Header)
MikamiUitOpen 0:5c237fdcba23 3 //
MikamiUitOpen 0:5c237fdcba23 4 // 2015/12/07, Copyright (c) 2015 MIKAMI, Naoki
MikamiUitOpen 0:5c237fdcba23 5 //-------------------------------------------------------
MikamiUitOpen 0:5c237fdcba23 6
MikamiUitOpen 0:5c237fdcba23 7 #ifndef SPECTRUM_DISPLAY_HPP
MikamiUitOpen 0:5c237fdcba23 8 #define SPECTRUM_DISPLAY_HPP
MikamiUitOpen 0:5c237fdcba23 9
MikamiUitOpen 0:5c237fdcba23 10 #include "LCD_DISCO_F746NG.h"
MikamiUitOpen 0:5c237fdcba23 11
MikamiUitOpen 0:5c237fdcba23 12 namespace Mikami
MikamiUitOpen 0:5c237fdcba23 13 {
MikamiUitOpen 0:5c237fdcba23 14 class SpectrumDisplay
MikamiUitOpen 0:5c237fdcba23 15 {
MikamiUitOpen 0:5c237fdcba23 16 public:
MikamiUitOpen 0:5c237fdcba23 17 SpectrumDisplay(LCD_DISCO_F746NG &lcd,
MikamiUitOpen 0:5c237fdcba23 18 int nFft, int x0, int y0,
MikamiUitOpen 0:5c237fdcba23 19 float db1, int bin, float maxDb, int fs,
MikamiUitOpen 0:5c237fdcba23 20 uint32_t axisColor, uint32_t lineColor,
MikamiUitOpen 0:5c237fdcba23 21 uint32_t backColor);
MikamiUitOpen 0:5c237fdcba23 22 void Draw(float db[]);
MikamiUitOpen 0:5c237fdcba23 23 void Clear();
MikamiUitOpen 0:5c237fdcba23 24
MikamiUitOpen 0:5c237fdcba23 25 private:
MikamiUitOpen 0:5c237fdcba23 26
MikamiUitOpen 0:5c237fdcba23 27 const int N_FFT_; // number of date for FFT
MikamiUitOpen 0:5c237fdcba23 28 const int X0_; // Origin for x axis
MikamiUitOpen 0:5c237fdcba23 29 const int Y0_; // Origin for y axis
MikamiUitOpen 0:5c237fdcba23 30 const float DB1_; // Pixels for 1 dB
MikamiUitOpen 0:5c237fdcba23 31 const int BIN_; // Pixels per bin
MikamiUitOpen 0:5c237fdcba23 32 const float MAX_DB_; // Maximum dB
MikamiUitOpen 0:5c237fdcba23 33 const int FS_; // Sampling frequency: 10 kHz
MikamiUitOpen 0:5c237fdcba23 34 const uint32_t AXIS_COLOR_;
MikamiUitOpen 0:5c237fdcba23 35 const uint32_t LINE_COLOR_;
MikamiUitOpen 0:5c237fdcba23 36 const uint32_t BACK_COLOR_;
MikamiUitOpen 0:5c237fdcba23 37
MikamiUitOpen 0:5c237fdcba23 38 LCD_DISCO_F746NG& lcd_;
MikamiUitOpen 0:5c237fdcba23 39
MikamiUitOpen 0:5c237fdcba23 40 void AxisX(); // x-axis
MikamiUitOpen 0:5c237fdcba23 41 void AxisY(); // y-axis
MikamiUitOpen 0:5c237fdcba23 42
MikamiUitOpen 0:5c237fdcba23 43 void DrawString(uint16_t x, uint16_t y, char str[])
MikamiUitOpen 0:5c237fdcba23 44 { lcd_.DisplayStringAt(x, y, (uint8_t *)str, LEFT_MODE); }
MikamiUitOpen 0:5c237fdcba23 45 };
MikamiUitOpen 0:5c237fdcba23 46 }
MikamiUitOpen 0:5c237fdcba23 47 #endif // SPECTRUM_DISPLAY_HPP