Kenji Arai
CW Decoder (Morse code decoder) 1st release version. Only run on Nucleo-F446RE mbed board.
Dependencies: Array_Matrix F446_AD_DA ST7565_SPI_LCD TextLCD UIT_FFT_Real
Fork of
F446_MySoundMachine
by 
不韋 呂
Base on F446_MySoundMachine program created by 不韋 呂-san.
Thanks to 不韋 呂-san making fundamental part such as FFT and ADC high speed interrupt driven program.
I just combined LCD and show CW code.
Diff: SignalProcessing/BilinearDesignLH.hpp
- Revision:
- 6:5e21ac9f0550
- Parent:
- 5:503bd366fd73
--- a/SignalProcessing/BilinearDesignLH.hpp Tue Jan 31 12:52:35 2017 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,53 +0,0 @@
-//------------------------------------------------------------------------
-// Design of Butterworth LPF and HPF using bilinear transform -- Header
-//
-// 2016/03/31, Copyright (c) 2016 MIKAMI, Naoki
-//------------------------------------------------------------------------
-
-#ifndef BILINEAR_BUTTERWORTH_HPP
-#define BILINEAR_BUTTERWORTH_HPP
-
-#include "mbed.h"
-#include <complex> // requisite
-#include "Array.hpp"
-
-namespace Mikami
-{
- typedef complex<float> Complex; // define "Complex"
-
- class BilinearDesign
- {
- public:
- struct Coefs { float a1, a2, b1, b2; };
- enum Type { LPF, HPF };
-
- // Constructor
- BilinearDesign(int order, float fs)
- : PI_FS_(PI_/fs), ORDER_(order),
- sP_(order/2), zP_(order/2), ck_(order/2) {}
-
- // Destractor
- virtual ~BilinearDesign() {}
-
- // Execution of design
- void Execute(float fc, Type pb, Coefs c[], float& g);
-
- private:
- static const float PI_ = 3.1415926536f;
- const float PI_FS_;
- const int ORDER_;
-
- Array<Complex> sP_; // Poles on s-plane
- Array<Complex> zP_; // Poles on z-plane
- Array<Coefs> ck_; // Coefficients of transfer function for cascade form
-
- float gain_; // Gain factor for cascade form
-
- void Butterworth();
- void Bilinear(float fc);
- void ToCascade(Type pb);
- void GetGain(Type pb);
- void GetCoefs(Coefs c[], float& gain);
- };
-}
-#endif // BILINEAR_BUTTERWORTH_HPP