不韋 呂
STM32F446 内蔵の DAC から出力する際に，補間フィルタを利用し，標本化周波数を入力の際の４倍の標本化周波数で出力するためのライブラリ．このライブラリを登録した際のプログラム： Demo_DSP_ADDA_Multirate. Library for outputting from built-in DAC in STM32F446 using interpolation filter at sampling frequency of 4 times in case of input.
Dependencies: Array_Matrix DSP_ADDA
Dependents: Demo_DSP_ADDA_Multirate DSP_AD_DA_Multirate DSP_GraphicEqualizerB DSP_VariableLHpfB ... more
Diff: MultirateLiPhCoefs.cpp
- Revision:
- 4:c233f2db4652
- Parent:
- 3:59af3dfa0595
- Child:
- 6:202a7610f937
--- a/MultirateLiPhCoefs.cpp Tue Jun 16 09:48:54 2020 +0000
+++ b/MultirateLiPhCoefs.cpp Thu Jun 18 05:06:42 2020 +0000
@@ -1,37 +1,38 @@
//-------------------------------------------------------------------
// デフォルトの補間用フィルタの係数
+// このの係数は，入力の標本化周波数は 10 kHz，出力の標本化周波数を
+// 40 kHz として設計したもの
//
-// 2020/06/16, Copyright (c) 2020 MIKAMI, Naoki
+// 2020/06/18, Copyright (c) 2020 MIKAMI, Naoki
//-------------------------------------------------------------------
#include "MultirateLiPh.hpp"
-using namespace Mikami;
-// 以下の係数は，入力の標本化周波数は 10 kHz，出力の標本化周波数は 40 kHz
-// として設計したもの
-//
-// 使用窓関数 Kaiser 窓
-// 標本化周波数 (kHz) 40.000000
-// 次数 72
-// 種類 LPF
-// 遮断周波数 (kHz) 5.000000
-// 減衰量 (dB) 40.00
-const int MultirateLiPh::ORDER_ = 72;
-const float MultirateLiPh::HK1_[] = {
- 4.431256E-03f, -8.146596E-03f, 1.341366E-02f, -2.077330E-02f,
- 3.116614E-02f, -4.650688E-02f, 7.151836E-02f, -1.218529E-01f,
- 2.971602E-01f, 8.993316E-01f, -1.751857E-01f, 9.144896E-02f,
- -5.727932E-02f, 3.802786E-02f, -2.550498E-02f, 1.678651E-02f,
- -1.055827E-02f, 6.120216E-03f};
-const float MultirateLiPh::HK2_[] = {
- 7.405152E-03f, -1.315348E-02f, 2.125564E-02f, -3.257789E-02f,
- 4.868468E-02f, -7.290120E-02f, 1.139337E-01f, -2.039652E-01f,
- 6.338376E-01f, 6.338376E-01f, -2.039652E-01f, 1.139337E-01f,
- -7.290120E-02f, 4.868468E-02f, -3.257789E-02f, 2.125564E-02f,
- -1.315348E-02f, 7.405152E-03f};
-const float MultirateLiPh::HK3_[] = {
- 6.120216E-03f, -1.055827E-02f, 1.678651E-02f, -2.550498E-02f,
- 3.802786E-02f, -5.727932E-02f, 9.144896E-02f, -1.751857E-01f,
- 8.993316E-01f, 2.971602E-01f, -1.218529E-01f, 7.151836E-02f,
- -4.650688E-02f, 3.116614E-02f, -2.077330E-02f, 1.341366E-02f,
- -8.146596E-03f, 4.431256E-03f};
\ No newline at end of file
+namespace Mikami
+{
+ // 使用窓関数 Kaiser 窓
+ // 標本化周波数 (kHz) 40.000000
+ // 次数 72
+ // 種類 LPF
+ // 遮断周波数 (kHz) 5.000000
+ // 減衰量 (dB) 40.00
+ const int MultirateLiPh::ORDER_ = 72;
+ const float MultirateLiPh::HK1_[] = {
+ 4.431256E-03f, -8.146596E-03f, 1.341366E-02f, -2.077330E-02f,
+ 3.116614E-02f, -4.650688E-02f, 7.151836E-02f, -1.218529E-01f,
+ 2.971602E-01f, 8.993316E-01f, -1.751857E-01f, 9.144896E-02f,
+ -5.727932E-02f, 3.802786E-02f, -2.550498E-02f, 1.678651E-02f,
+ -1.055827E-02f, 6.120216E-03f};
+ const float MultirateLiPh::HK2_[] = {
+ 7.405152E-03f, -1.315348E-02f, 2.125564E-02f, -3.257789E-02f,
+ 4.868468E-02f, -7.290120E-02f, 1.139337E-01f, -2.039652E-01f,
+ 6.338376E-01f, 6.338376E-01f, -2.039652E-01f, 1.139337E-01f,
+ -7.290120E-02f, 4.868468E-02f, -3.257789E-02f, 2.125564E-02f,
+ -1.315348E-02f, 7.405152E-03f};
+ const float MultirateLiPh::HK3_[] = {
+ 6.120216E-03f, -1.055827E-02f, 1.678651E-02f, -2.550498E-02f,
+ 3.802786E-02f, -5.727932E-02f, 9.144896E-02f, -1.751857E-01f,
+ 8.993316E-01f, 2.971602E-01f, -1.218529E-01f, 7.151836E-02f,
+ -4.650688E-02f, 3.116614E-02f, -2.077330E-02f, 1.341366E-02f,
+ -8.146596E-03f, 4.431256E-03f};
+}
\ No newline at end of file