Kenji Arai / Mbed OS CW_Decoder_using_FFT_on_F446

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.

MySpectrogram/AnalysisBase.cpp@6:5e21ac9f0550, 2017-02-05 (annotated)

Committer:
kenjiArai
Date:
Sun Feb 05 08:02:54 2017 +0000
Revision:
6:5e21ac9f0550
CW Decoder (Morse code decoder) 1st release version.  Only run on Nucleo-F446RE mbed board.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kenjiArai 6:5e21ac9f0550 1 //-------------------------------------------------------
kenjiArai 6:5e21ac9f0550 2 // Base abstract class for spectrum analysis
kenjiArai 6:5e21ac9f0550 3 //
kenjiArai 6:5e21ac9f0550 4 // 2016/07/23, Copyright (c) 2016 MIKAMI, Naoki
kenjiArai 6:5e21ac9f0550 5 //-------------------------------------------------------
kenjiArai 6:5e21ac9f0550 6
kenjiArai 6:5e21ac9f0550 7 #include "AnalysisBase.hpp"
kenjiArai 6:5e21ac9f0550 8
kenjiArai 6:5e21ac9f0550 9 namespace Mikami
kenjiArai 6:5e21ac9f0550 10 {
kenjiArai 6:5e21ac9f0550 11 AnalyzerBase::AnalyzerBase(int nData, int nFft, int nUse)
kenjiArai 6:5e21ac9f0550 12 : N_DATA_(nData), N_FFT_(nFft),
kenjiArai 6:5e21ac9f0550 13 fft_(nFft), wHm_(nData-1, nUse),
kenjiArai 6:5e21ac9f0550 14 xData_(nUse), wData_(nUse) {}
kenjiArai 6:5e21ac9f0550 15
kenjiArai 6:5e21ac9f0550 16 void AnalyzerBase::Execute(const float xn[], float db[])
kenjiArai 6:5e21ac9f0550 17 {
kenjiArai 6:5e21ac9f0550 18 // Differencing
kenjiArai 6:5e21ac9f0550 19 for (int n=0; n<N_DATA_-1; n++)
kenjiArai 6:5e21ac9f0550 20 xData_[n] = xn[n+1] - 0.8f*xn[n];
kenjiArai 6:5e21ac9f0550 21
kenjiArai 6:5e21ac9f0550 22 // Windowing
kenjiArai 6:5e21ac9f0550 23 wHm_.Execute(xData_, wData_);
kenjiArai 6:5e21ac9f0550 24
kenjiArai 6:5e21ac9f0550 25 Analyze(wData_, db);
kenjiArai 6:5e21ac9f0550 26 }
kenjiArai 6:5e21ac9f0550 27 }