不韋 呂 / Mbed 2 deprecated F446_Spectrogram

Realtime sound spectrogram using FFT or linear prediction. Spectrogram is displayed on the display of PC. リアルタイム･スペクトログラム．解析の手法：FFT，線形予測法．スペクトログラムは PC のディスプレー装置に表示される．PC 側のプログラム：F446_Spectrogram.

Dependencies:   Array_Matrix mbed SerialTxRxIntr F446_AD_DA UIT_FFT_Real

Xfer.hpp@7:5ba884060d3b, 2019-11-24 (annotated)

Committer:
MikamiUitOpen
Date:
Sun Nov 24 11:14:01 2019 +0000
Revision:
7:5ba884060d3b
8

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 7:5ba884060d3b 1 //---------------------------------------------------------------------
MikamiUitOpen 7:5ba884060d3b 2 // スペクトル解析の結果を PC へ転送するためのクラス
MikamiUitOpen 7:5ba884060d3b 3 //
MikamiUitOpen 7:5ba884060d3b 4 // 2019/11/24, Copyright (c) 2019 MIKAMI, Naoki
MikamiUitOpen 7:5ba884060d3b 5 //---------------------------------------------------------------------
MikamiUitOpen 7:5ba884060d3b 6
MikamiUitOpen 7:5ba884060d3b 7 #include <string>
MikamiUitOpen 7:5ba884060d3b 8 #include "Array.hpp"
MikamiUitOpen 7:5ba884060d3b 9 #include "SerialRxTxIntr.hpp"
MikamiUitOpen 7:5ba884060d3b 10 using namespace Mikami;
MikamiUitOpen 7:5ba884060d3b 11
MikamiUitOpen 7:5ba884060d3b 12 #ifndef XFER_CONVERT_TOPC_HPP
MikamiUitOpen 7:5ba884060d3b 13 #define XFER_CONVERT_TOPC_HPP
MikamiUitOpen 7:5ba884060d3b 14
MikamiUitOpen 7:5ba884060d3b 15 class Xfer
MikamiUitOpen 7:5ba884060d3b 16 {
MikamiUitOpen 7:5ba884060d3b 17 public:
MikamiUitOpen 7:5ba884060d3b 18 // コンストラクタ
MikamiUitOpen 7:5ba884060d3b 19 Xfer(SerialRxTxIntr& rxTx, int size)
MikamiUitOpen 7:5ba884060d3b 20 : SIZE_(size), xn_(size), rxTx_(rxTx) {}
MikamiUitOpen 7:5ba884060d3b 21
MikamiUitOpen 7:5ba884060d3b 22 // スペクトル解析の結果を転送する形式に変換
MikamiUitOpen 7:5ba884060d3b 23 void Convert(const float db[], float levelShift)
MikamiUitOpen 7:5ba884060d3b 24 {
MikamiUitOpen 7:5ba884060d3b 25 static const float FACTOR = 10000.0f/80.0f; // 表示範囲： 0 ～ 80 dB
MikamiUitOpen 7:5ba884060d3b 26 for (int n=0; n<SIZE_; n++)
MikamiUitOpen 7:5ba884060d3b 27 {
MikamiUitOpen 7:5ba884060d3b 28 float xDb = FACTOR*(db[n] + 30.0f + levelShift);
MikamiUitOpen 7:5ba884060d3b 29 if (xDb > 10000) xDb = 10000;
MikamiUitOpen 7:5ba884060d3b 30 if (xDb < 0) xDb = 0;
MikamiUitOpen 7:5ba884060d3b 31 xn_[n] = (uint16_t)xDb;
MikamiUitOpen 7:5ba884060d3b 32 }
MikamiUitOpen 7:5ba884060d3b 33 }
MikamiUitOpen 7:5ba884060d3b 34
MikamiUitOpen 7:5ba884060d3b 35 // データを PC へ転送（0 ～ 10,000 の範囲の値を 2 文字で表すコード化を利用）
MikamiUitOpen 7:5ba884060d3b 36 void ToPC()
MikamiUitOpen 7:5ba884060d3b 37 {
MikamiUitOpen 7:5ba884060d3b 38 string str = "";
MikamiUitOpen 7:5ba884060d3b 39 for (int n=0; n<SIZE_; n++)
MikamiUitOpen 7:5ba884060d3b 40 {
MikamiUitOpen 7:5ba884060d3b 41 div_t a = div(xn_[n], 100);
MikamiUitOpen 7:5ba884060d3b 42 str += a.quot + 0x10;
MikamiUitOpen 7:5ba884060d3b 43 str += a.rem + 0x10;
MikamiUitOpen 7:5ba884060d3b 44 }
MikamiUitOpen 7:5ba884060d3b 45 rxTx_.Tx(str+"\n");
MikamiUitOpen 7:5ba884060d3b 46 rxTx_.Tx("EOT\n");
MikamiUitOpen 7:5ba884060d3b 47 }
MikamiUitOpen 7:5ba884060d3b 48
MikamiUitOpen 7:5ba884060d3b 49 private:
MikamiUitOpen 7:5ba884060d3b 50 const int SIZE_; // PC に送るデータ数
MikamiUitOpen 7:5ba884060d3b 51 Array<uint16_t> xn_; // PC に送るデータ
MikamiUitOpen 7:5ba884060d3b 52 SerialRxTxIntr& rxTx_;
MikamiUitOpen 7:5ba884060d3b 53
MikamiUitOpen 7:5ba884060d3b 54 // コピー･コンストラクタおよび代入演算子の禁止のため
MikamiUitOpen 7:5ba884060d3b 55 Xfer(const Xfer&);
MikamiUitOpen 7:5ba884060d3b 56 Xfer& operator=(const Xfer&);
MikamiUitOpen 7:5ba884060d3b 57 };
MikamiUitOpen 7:5ba884060d3b 58 #endif // XFER_CONVERT_TOPC_HPP