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:
- 12:f7bfe38c93ab
- Parent:
- 11:91190380ca3c
--- a/MultirateLiPhCoefs.cpp Sun Dec 20 08:10:40 2020 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,38 +0,0 @@
-//-------------------------------------------------------------------
-// デフォルトの補間用フィルタの係数
-// この係数は，入力の標本化周波数を 10 kHz，
-// 出力の標本化周波数を 40 kHz として設計した
-//
-// 2020/12/06, Copyright (c) 2020 MIKAMI, Naoki
-//-------------------------------------------------------------------
-
-#include "MultirateLiPh.hpp"
-
-namespace Mikami
-{
- // 使用窓関数 Kaiser 窓
- // 標本化周波数 (kHz) 40.000000
- // 次数 70
- // 種類 LPF
- // 遮断周波数 (kHz) 5.000000
- // 減衰量 (dB) 40.00
- const int MultirateLiPh::ORDER_ = 70;
- const float MultirateLiPh::HK1_[] = {
- 3.806160E-03f, -7.410556E-03f, 1.260559E-02f, -1.994242E-02f,
- 3.036776E-02f, -4.579744E-02f, 7.095016E-02f, -1.214690E-01f,
- 2.969901E-01f, 8.992744E-01f, -1.749060E-01f, 9.096828E-02f,
- -5.663444E-02f, 3.726704E-02f, -2.468324E-02f, 1.596038E-02f,
- -9.780624E-03f, 5.435560E-03f};
- const float MultirateLiPh::HK2_[] = {
- 6.477720E-03f, -1.208128E-02f, 2.009782E-02f, -3.140681E-02f,
- 4.757964E-02f, -7.194132E-02f, 1.131902E-01f, -2.034948E-01f,
- 6.336764E-01f, 6.336764E-01f, -2.034948E-01f, 1.131902E-01f,
- -7.194132E-02f, 4.757964E-02f, -3.140681E-02f, 2.009782E-02f,
- -1.208128E-02f, 6.477720E-03f};
- const float MultirateLiPh::HK3_[] = {
- 5.435560E-03f, -9.780624E-03f, 1.596038E-02f, -2.468324E-02f,
- 3.726704E-02f, -5.663444E-02f, 9.096828E-02f, -1.749060E-01f,
- 8.992744E-01f, 2.969901E-01f, -1.214690E-01f, 7.095016E-02f,
- -4.579744E-02f, 3.036776E-02f, -1.994242E-02f, 1.260559E-02f,
- -7.410556E-03f, 3.806160E-03f};
-}
\ No newline at end of file