不韋 呂 / Mbed 2 deprecated F446_DSP_FFT_Analyzer

FFT によるスペクトル解析器

Dependencies:   Array_Matrix mbed SerialTxRxIntr UIT_FFT_Real DSP_ADDA

MSeq16.hpp@0:91cc5a03f0ca, 2021-01-08 (annotated)

Committer:
MikamiUitOpen
Date:
Fri Jan 08 02:27:46 2021 +0000
Revision:
0:91cc5a03f0ca
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:91cc5a03f0ca 1 //---------------------------------------------------------
MikamiUitOpen 0:91cc5a03f0ca 2 // M 系列信号発生器（N = 16）
MikamiUitOpen 0:91cc5a03f0ca 3 //
MikamiUitOpen 0:91cc5a03f0ca 4 // 2020/10/17, Copyright (c) 2020 MIKAMI, Naoki
MikamiUitOpen 0:91cc5a03f0ca 5 //---------------------------------------------------------
MikamiUitOpen 0:91cc5a03f0ca 6
MikamiUitOpen 0:91cc5a03f0ca 7 #include "mbed.h"
MikamiUitOpen 0:91cc5a03f0ca 8
MikamiUitOpen 0:91cc5a03f0ca 9 #ifndef MSEQ16_HPP
MikamiUitOpen 0:91cc5a03f0ca 10 #define MSEQ16_HPP
MikamiUitOpen 0:91cc5a03f0ca 11
MikamiUitOpen 0:91cc5a03f0ca 12 namespace Mikami
MikamiUitOpen 0:91cc5a03f0ca 13 {
MikamiUitOpen 0:91cc5a03f0ca 14 class MSeq16
MikamiUitOpen 0:91cc5a03f0ca 15 {
MikamiUitOpen 0:91cc5a03f0ca 16 public:
MikamiUitOpen 0:91cc5a03f0ca 17 MSeq16() : reg_(1) {}
MikamiUitOpen 0:91cc5a03f0ca 18
MikamiUitOpen 0:91cc5a03f0ca 19 // 戻り値： 1 => 1, 0 => -1
MikamiUitOpen 0:91cc5a03f0ca 20 int Execute()
MikamiUitOpen 0:91cc5a03f0ca 21 {
MikamiUitOpen 0:91cc5a03f0ca 22 if ((reg_ & B_M_) == B_M_)
MikamiUitOpen 0:91cc5a03f0ca 23 {
MikamiUitOpen 0:91cc5a03f0ca 24 reg_ = ((reg_ ^ XOR_) << 1) | 1; // 1 の場合の処理
MikamiUitOpen 0:91cc5a03f0ca 25 return 1;
MikamiUitOpen 0:91cc5a03f0ca 26 }
MikamiUitOpen 0:91cc5a03f0ca 27 else
MikamiUitOpen 0:91cc5a03f0ca 28 {
MikamiUitOpen 0:91cc5a03f0ca 29 reg_ = reg_ << 1; // 0 の場合の処理
MikamiUitOpen 0:91cc5a03f0ca 30 return -1;
MikamiUitOpen 0:91cc5a03f0ca 31 }
MikamiUitOpen 0:91cc5a03f0ca 32 }
MikamiUitOpen 0:91cc5a03f0ca 33 private:
MikamiUitOpen 0:91cc5a03f0ca 34 static const uint16_t XOR_ = (1 << (2-1))
MikamiUitOpen 0:91cc5a03f0ca 35 | (1 << (3-1))
MikamiUitOpen 0:91cc5a03f0ca 36 | (1 << (5-1)); // XOR の位置に対応する定数
MikamiUitOpen 0:91cc5a03f0ca 37 static const uint16_t B_M_ = 1 << (16-1); // 16 段目に相当するビットを調べる
MikamiUitOpen 0:91cc5a03f0ca 38
MikamiUitOpen 0:91cc5a03f0ca 39 uint16_t reg_;
MikamiUitOpen 0:91cc5a03f0ca 40 };
MikamiUitOpen 0:91cc5a03f0ca 41 }
MikamiUitOpen 0:91cc5a03f0ca 42 #endif // MSEQ16_HPP