不韋 呂 / Mbed 2 deprecated TrG_Spectrogram

スペクトログラム このプログラムの説明は，CQ出版社「トランジスタ技術」の2021年10月号から開始された連載記事「STM32マイコンではじめるPC計測」の中にあります．このプログラムといっしょに使うPC側のプログラムについても同誌を参照してください．

Dependencies:   Array_Matrix mbed SerialTxRxIntr DSP_ADDA UIT_FFT_Real Window

IIR_Filter/IirCascade.hpp@2:2ca9f8a0f6ef, 2022-04-21 (annotated)

Committer:
MikamiUitOpen
Date:
Thu Apr 21 05:45:48 2022 +0000
Revision:
2:2ca9f8a0f6ef
Parent:
0:3bf11d2ab6ad 
3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:3bf11d2ab6ad 1 //---------------------------------------------------
MikamiUitOpen 0:3bf11d2ab6ad 2 // 縦続形 IIR フィルタ
MikamiUitOpen 0:3bf11d2ab6ad 3 //
MikamiUitOpen 0:3bf11d2ab6ad 4 // 2020/11/04, Copyright (c) 2020 MIKAMI, Naoki
MikamiUitOpen 0:3bf11d2ab6ad 5 //---------------------------------------------------
MikamiUitOpen 0:3bf11d2ab6ad 6
MikamiUitOpen 0:3bf11d2ab6ad 7 #include "Biquad.hpp"
MikamiUitOpen 0:3bf11d2ab6ad 8 #include "Array.hpp" // Array クラスが定義されている
MikamiUitOpen 0:3bf11d2ab6ad 9 using namespace Mikami;
MikamiUitOpen 0:3bf11d2ab6ad 10
MikamiUitOpen 0:3bf11d2ab6ad 11 #ifndef IIR_CASCADE_HPP
MikamiUitOpen 0:3bf11d2ab6ad 12 #define IIR_CASCADE_HPP
MikamiUitOpen 0:3bf11d2ab6ad 13
MikamiUitOpen 0:3bf11d2ab6ad 14 class IirCascade
MikamiUitOpen 0:3bf11d2ab6ad 15 {
MikamiUitOpen 0:3bf11d2ab6ad 16 public:
MikamiUitOpen 0:3bf11d2ab6ad 17 // コンストラクタ
MikamiUitOpen 0:3bf11d2ab6ad 18 IirCascade(int order, const Biquad::Coefs ck[], float g0)
MikamiUitOpen 0:3bf11d2ab6ad 19 : order_(order), hn_((order+1)/2)
MikamiUitOpen 0:3bf11d2ab6ad 20 { SetCoefs(order, ck, g0); }
MikamiUitOpen 0:3bf11d2ab6ad 21
MikamiUitOpen 0:3bf11d2ab6ad 22 // コンストラクタ
MikamiUitOpen 0:3bf11d2ab6ad 23 IirCascade(int order, const Biquad hk[], float g0)
MikamiUitOpen 0:3bf11d2ab6ad 24 : order_(order), hn_((order+1)/2, hk), g0_(g0) {}
MikamiUitOpen 0:3bf11d2ab6ad 25
MikamiUitOpen 0:3bf11d2ab6ad 26 virtual ~IirCascade() {}
MikamiUitOpen 0:3bf11d2ab6ad 27
MikamiUitOpen 0:3bf11d2ab6ad 28 // フィルタ処理を実行する
MikamiUitOpen 0:3bf11d2ab6ad 29 float Execute(float xn)
MikamiUitOpen 0:3bf11d2ab6ad 30 {
MikamiUitOpen 0:3bf11d2ab6ad 31 float yn = g0_*xn;
MikamiUitOpen 0:3bf11d2ab6ad 32 for (int k=0; k<(order_+1)/2; k++) yn = hn_[k].Execute(yn);
MikamiUitOpen 0:3bf11d2ab6ad 33 return yn;
MikamiUitOpen 0:3bf11d2ab6ad 34 }
MikamiUitOpen 0:3bf11d2ab6ad 35
MikamiUitOpen 0:3bf11d2ab6ad 36 // 係数の設定
MikamiUitOpen 0:3bf11d2ab6ad 37 void SetCoefs(int order, const Biquad::Coefs ck[], float g0)
MikamiUitOpen 0:3bf11d2ab6ad 38 {
MikamiUitOpen 0:3bf11d2ab6ad 39 if (order_ != order)
MikamiUitOpen 0:3bf11d2ab6ad 40 {
MikamiUitOpen 0:3bf11d2ab6ad 41 order_ = order;
MikamiUitOpen 0:3bf11d2ab6ad 42 hn_.SetSize((order+1)/2);
MikamiUitOpen 0:3bf11d2ab6ad 43 }
MikamiUitOpen 0:3bf11d2ab6ad 44 g0_ = g0;
MikamiUitOpen 0:3bf11d2ab6ad 45 for (int k=0; k<(order+1)/2; k++) hn_[k].SetCoefs(ck[k]);
MikamiUitOpen 0:3bf11d2ab6ad 46 }
MikamiUitOpen 0:3bf11d2ab6ad 47
MikamiUitOpen 0:3bf11d2ab6ad 48 // 内部変数（遅延器）のクリア
MikamiUitOpen 0:3bf11d2ab6ad 49 void Clear()
MikamiUitOpen 0:3bf11d2ab6ad 50 { for (int k=0; k<(order_+1)/2; k++) hn_[k].Clear(); }
MikamiUitOpen 0:3bf11d2ab6ad 51
MikamiUitOpen 0:3bf11d2ab6ad 52 private:
MikamiUitOpen 0:3bf11d2ab6ad 53 int order_; // 次数
MikamiUitOpen 0:3bf11d2ab6ad 54 Array<Biquad> hn_; // Biquad クラスのオブジェクトの配列
MikamiUitOpen 0:3bf11d2ab6ad 55 float g0_; // 利得定数
MikamiUitOpen 0:3bf11d2ab6ad 56 };
MikamiUitOpen 0:3bf11d2ab6ad 57 #endif // IIR_CASCADE_HPP