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
Revision 12:f7bfe38c93ab, committed 2021-12-22
- Comitter:
- MikamiUitOpen
- Date:
- Wed Dec 22 08:01:24 2021 +0000
- Parent:
- 11:91190380ca3c
- Commit message:
- 13
Changed in this revision
diff -r 91190380ca3c -r f7bfe38c93ab MultirateLiPh.cpp
--- a/MultirateLiPh.cpp Sun Dec 20 08:10:40 2020 +0000
+++ b/MultirateLiPh.cpp Wed Dec 22 08:01:24 2021 +0000
@@ -2,10 +2,11 @@
// 出力を 4 倍にアップサンプリングするクラス
// 補間処理で使うフィルタ：直線位相 FIR フィルタ
//
-// 2020/12/20, Copyright (c) 2020 MIKAMI, Naoki
+// 2021/12/22, Copyright (c) 2021 MIKAMI, Naoki
//-----------------------------------------------------------
#include "MultirateLiPh.hpp"
+#include "MultirateLiPhCoefs.hpp" // デフォルトの補間用フィルタの係数
namespace Mikami
{
diff -r 91190380ca3c -r f7bfe38c93ab MultirateLiPh.hpp --- a/MultirateLiPh.hpp Sun Dec 20 08:10:40 2020 +0000 +++ b/MultirateLiPh.hpp Wed Dec 22 08:01:24 2021 +0000 @@ -4,7 +4,7 @@ // // 出力端子： A2 (PA_4) // -// 2020/12/20, Copyright (c) 2020 MIKAMI, Naoki +// 2021/12/22, Copyright (c) 2021 MIKAMI, Naoki //----------------------------------------------------------- #include "DSP_AdcIntr.hpp"
diff -r 91190380ca3c -r f7bfe38c93ab MultirateLiPhCoefs.cpp
--- 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
diff -r 91190380ca3c -r f7bfe38c93ab MultirateLiPhCoefs.hpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/MultirateLiPhCoefs.hpp Wed Dec 22 08:01:24 2021 +0000
@@ -0,0 +1,38 @@
+//-------------------------------------------------------------------
+// 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
+//
+// 2021/12/22, Copyright (c) 2021 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 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