不韋 呂 / Mbed 2 deprecated F446_DSP_FunctionGenerator

ファンクション･ジェネレータ

Dependencies:   mbed SerialTxRxIntr MyTicker7 Array_Matrix

IIR_Cascade/Biquad.hpp@1:ea5aa7f3d68c, 2020-12-23 (annotated)

Committer:
MikamiUitOpen
Date:
Wed Dec 23 01:07:09 2020 +0000
Revision:
1:ea5aa7f3d68c
Parent:
0:17c762b41fc7 
2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:17c762b41fc7 1 //--------------------------------------------------------------
MikamiUitOpen 0:17c762b41fc7 2 // 縦続形 IIR フィルタの構成要素として使う 2 次の IIR フィルタ（ヘッダ）
MikamiUitOpen 0:17c762b41fc7 3 // b0 は 1 と仮定している
MikamiUitOpen 0:17c762b41fc7 4 //
MikamiUitOpen 0:17c762b41fc7 5 // 2020/02/12, Copyright (c) 2020 MIKAMI, Naoki
MikamiUitOpen 0:17c762b41fc7 6 //--------------------------------------------------------------
MikamiUitOpen 0:17c762b41fc7 7
MikamiUitOpen 0:17c762b41fc7 8 #ifndef IIR_BIQUAD_HPP
MikamiUitOpen 0:17c762b41fc7 9 #define IIR_BIQUAD_HPP
MikamiUitOpen 0:17c762b41fc7 10
MikamiUitOpen 0:17c762b41fc7 11 #include "mbed.h"
MikamiUitOpen 0:17c762b41fc7 12
MikamiUitOpen 0:17c762b41fc7 13 namespace Mikami
MikamiUitOpen 0:17c762b41fc7 14 {
MikamiUitOpen 0:17c762b41fc7 15 class Biquad
MikamiUitOpen 0:17c762b41fc7 16 {
MikamiUitOpen 0:17c762b41fc7 17 public:
MikamiUitOpen 0:17c762b41fc7 18 // フィルタの係数をまとめて扱うための構造体
MikamiUitOpen 0:17c762b41fc7 19 struct Coefs { float a1, a2, b1, b2; };
MikamiUitOpen 0:17c762b41fc7 20
MikamiUitOpen 0:17c762b41fc7 21 // デフォルト･コンストラクタ
MikamiUitOpen 0:17c762b41fc7 22 // 係数は構造体 Ceofs で与える
MikamiUitOpen 0:17c762b41fc7 23 Biquad(const Coefs ck = (Coefs){0, 0, 0, 0});
MikamiUitOpen 0:17c762b41fc7 24
MikamiUitOpen 0:17c762b41fc7 25 // 係数を個別に与えるコンストラクタ
MikamiUitOpen 0:17c762b41fc7 26 Biquad(float a1, float a2, float b1, float b2);
MikamiUitOpen 0:17c762b41fc7 27
MikamiUitOpen 0:17c762b41fc7 28 // 2 次のフィルタを実行する
MikamiUitOpen 0:17c762b41fc7 29 float Execute(float xn);
MikamiUitOpen 0:17c762b41fc7 30
MikamiUitOpen 0:17c762b41fc7 31 // 係数を設定する
MikamiUitOpen 0:17c762b41fc7 32 void SetCoefs(const Coefs ck);
MikamiUitOpen 0:17c762b41fc7 33
MikamiUitOpen 0:17c762b41fc7 34 // 内部変数（遅延器）のクリア
MikamiUitOpen 0:17c762b41fc7 35 void Clear() { un1_ = un2_ = 0; }
MikamiUitOpen 0:17c762b41fc7 36
MikamiUitOpen 0:17c762b41fc7 37 private:
MikamiUitOpen 0:17c762b41fc7 38 float a1_, a2_, b1_, b2_;
MikamiUitOpen 0:17c762b41fc7 39 float un1_, un2_;
MikamiUitOpen 0:17c762b41fc7 40
MikamiUitOpen 0:17c762b41fc7 41 // コピー･コンストラクタ禁止のため
MikamiUitOpen 0:17c762b41fc7 42 Biquad(const Biquad&);
MikamiUitOpen 0:17c762b41fc7 43 };
MikamiUitOpen 0:17c762b41fc7 44 }
MikamiUitOpen 0:17c762b41fc7 45 #endif // IIR_BIQUAD_HPP