Realtime spectrum analyzer. Using FFT, linear prediction, or cepstrum smoothing. Version using MEMS microphone and CODEC, named "F746_RealtimeSpectrumAnalyzer_MEMS_Mic" is registered. リアルタイム スペクトル解析器.解析の手法:FFT,線形予測法,ケプストラムによる平滑化の3種類.このプログラムの説明は,CQ出版社のインターフェース誌,2016年4月号に掲載.外付けのマイクまたは他の信号源等を A0 に接続する.線形予測法,ケプストラムは,スペクトル解析の対象を音声信号に想定してパラメータを設定している.MEMS マイクと CODEC を使ったバージョンを "F746_RealtimeSpectrumAnalyzer_MEMS_Mic" として登録.
Dependencies: BSP_DISCO_F746NG BUTTON_GROUP LCD_DISCO_F746NG TS_DISCO_F746NG UIT_FFT_Real mbed
MyClasses/Sampler.hpp@4:99d4d5ea06a2, 2015-12-15 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Tue Dec 15 02:39:31 2015 +0000
- Revision:
- 4:99d4d5ea06a2
- Parent:
- 2:095b360e0f54
- Child:
- 6:b27ef8d98edc
5
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
MikamiUitOpen | 0:5c237fdcba23 | 1 | //----------------------------------------------------------- |
MikamiUitOpen | 2:095b360e0f54 | 2 | // Class for sampling input signal (Header) |
MikamiUitOpen | 0:5c237fdcba23 | 3 | // |
MikamiUitOpen | 4:99d4d5ea06a2 | 4 | // 2015/12/15, Copyright (c) 2015 MIKAMI, Naoki |
MikamiUitOpen | 0:5c237fdcba23 | 5 | //----------------------------------------------------------- |
MikamiUitOpen | 0:5c237fdcba23 | 6 | |
MikamiUitOpen | 0:5c237fdcba23 | 7 | #ifndef F746_SAMPLER_HPP |
MikamiUitOpen | 0:5c237fdcba23 | 8 | #define F746_SAMPLER_HPP |
MikamiUitOpen | 0:5c237fdcba23 | 9 | |
MikamiUitOpen | 0:5c237fdcba23 | 10 | #include "mbed.h" |
MikamiUitOpen | 0:5c237fdcba23 | 11 | |
MikamiUitOpen | 0:5c237fdcba23 | 12 | namespace Mikami |
MikamiUitOpen | 0:5c237fdcba23 | 13 | { |
MikamiUitOpen | 0:5c237fdcba23 | 14 | class Sampler |
MikamiUitOpen | 0:5c237fdcba23 | 15 | { |
MikamiUitOpen | 0:5c237fdcba23 | 16 | public: |
MikamiUitOpen | 2:095b360e0f54 | 17 | Sampler(PinName pin, int fs, int nData); |
MikamiUitOpen | 0:5c237fdcba23 | 18 | |
MikamiUitOpen | 0:5c237fdcba23 | 19 | ~Sampler() { delete[] buffer_; } |
MikamiUitOpen | 2:095b360e0f54 | 20 | |
MikamiUitOpen | 2:095b360e0f54 | 21 | void IntrEnable(); |
MikamiUitOpen | 0:5c237fdcba23 | 22 | |
MikamiUitOpen | 0:5c237fdcba23 | 23 | bool Filled() { return filled_; } |
MikamiUitOpen | 0:5c237fdcba23 | 24 | |
MikamiUitOpen | 0:5c237fdcba23 | 25 | void Restart() { filled_ = false; } |
MikamiUitOpen | 0:5c237fdcba23 | 26 | |
MikamiUitOpen | 2:095b360e0f54 | 27 | void InvertEnable(bool onOff) |
MikamiUitOpen | 2:095b360e0f54 | 28 | { sw_ = onOff ? 1 : 0; } |
MikamiUitOpen | 0:5c237fdcba23 | 29 | |
MikamiUitOpen | 2:095b360e0f54 | 30 | // Get pointer for sampled data |
MikamiUitOpen | 0:5c237fdcba23 | 31 | int16_t* Get() { return buffer_; } |
MikamiUitOpen | 4:99d4d5ea06a2 | 32 | |
MikamiUitOpen | 4:99d4d5ea06a2 | 33 | // disallow copy constructor and assignment operator |
MikamiUitOpen | 4:99d4d5ea06a2 | 34 | Sampler(const Sampler& ); |
MikamiUitOpen | 4:99d4d5ea06a2 | 35 | Sampler& operator=(const Sampler& ); |
MikamiUitOpen | 0:5c237fdcba23 | 36 | |
MikamiUitOpen | 0:5c237fdcba23 | 37 | private: |
MikamiUitOpen | 2:095b360e0f54 | 38 | const int TS_; // sampling period |
MikamiUitOpen | 0:5c237fdcba23 | 39 | const int N_DATA_; // number of 1 frame data |
MikamiUitOpen | 0:5c237fdcba23 | 40 | |
MikamiUitOpen | 0:5c237fdcba23 | 41 | AnalogIn aIn_; // Object of ADC |
MikamiUitOpen | 2:095b360e0f54 | 42 | Ticker timer_; // Object of Ticker |
MikamiUitOpen | 0:5c237fdcba23 | 43 | |
MikamiUitOpen | 0:5c237fdcba23 | 44 | bool trigger_; |
MikamiUitOpen | 0:5c237fdcba23 | 45 | bool filled_; |
MikamiUitOpen | 0:5c237fdcba23 | 46 | int count_; |
MikamiUitOpen | 0:5c237fdcba23 | 47 | int16_t xnM1_; |
MikamiUitOpen | 2:095b360e0f54 | 48 | int sw_; |
MikamiUitOpen | 0:5c237fdcba23 | 49 | int16_t* buffer_; // for sampled data |
MikamiUitOpen | 2:095b360e0f54 | 50 | |
MikamiUitOpen | 2:095b360e0f54 | 51 | // For input |
MikamiUitOpen | 2:095b360e0f54 | 52 | int16_t (Sampler::*Rd[2])(); |
MikamiUitOpen | 2:095b360e0f54 | 53 | int16_t ReadNorm() { return aIn_.read_u16() - 32767; } |
MikamiUitOpen | 2:095b360e0f54 | 54 | int16_t ReadInv() { return 32767 - aIn_.read_u16(); } |
MikamiUitOpen | 2:095b360e0f54 | 55 | |
MikamiUitOpen | 2:095b360e0f54 | 56 | void Set(bool tf); |
MikamiUitOpen | 2:095b360e0f54 | 57 | |
MikamiUitOpen | 2:095b360e0f54 | 58 | // Interrupt service routine for Ticker |
MikamiUitOpen | 2:095b360e0f54 | 59 | void Isr(); |
MikamiUitOpen | 0:5c237fdcba23 | 60 | }; |
MikamiUitOpen | 0:5c237fdcba23 | 61 | } |
MikamiUitOpen | 0:5c237fdcba23 | 62 | #endif // F746_SAMPLER_HPP |