The experiment using this program is introduced on "Interface" No.3, CQ publishing Co.,Ltd, 2015. 本プログラムを使った実験は,CQ出版社のインターフェース 2015年3月号で紹介しています.
Dependencies: DSProcessingIO mbed
TwoPhaseGenerator.hpp
- Committer:
- CQpub0Mikami
- Date:
- 2014-12-27
- Revision:
- 2:0b15cd2b79e3
- Parent:
- 0:a5a171eda3f8
File content as of revision 2:0b15cd2b79e3:
//-------------------------------------------------------------- // Two phase sin generator class // Copyright (c) 2014 MIKAMI, Naoki, 2014/06/23 //-------------------------------------------------------------- #ifndef TWO_PHASE_GENERATOR_HPP #define TWO_PHASE_GENERATOR_HPP #include "mbed.h" namespace Mikami { class TwoPhaseGenerator { public: // Constructor TwoPhaseGenerator(float f0, float fs) : a1_(cosf(6.283185f*f0/fs)), b1_(sinf(6.283185f*f0/fs)), xn1_(1.0f), yn1_(0.0f) {} // -1.0f <= x1, x2 <= 1.0f void Generate(float& xn, float& yn) { yn = a1_*yn1_ + b1_*xn1_; // sin xn = -b1_*yn1_ + a1_*xn1_; // cos float c1 = 1.5f - 0.5f*(xn*xn + yn*yn); xn1_ = c1*xn; yn1_ = c1*yn; } private: const float a1_, b1_; float xn1_, yn1_; TwoPhaseGenerator(const TwoPhaseGenerator&); TwoPhaseGenerator& operator=(const TwoPhaseGenerator&); }; } #endif // TWO_PHASE_GENERATOR_HPP