Akifumi Takahashi / AMPulseTrain

This makes Amplitude Modulated Pulse Train, which can be regarded as the discretized wave of the signal. Pulse Train can be defined by frequency and duty cycle, which can be temporarily changed, referring to PWM.

Dependents:   Interference_Simple

Diff: DSin.h

Revision:
2:b01e84ce3ae0
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DSin.h	Mon Dec 02 22:48:37 2019 +0000
@@ -0,0 +1,97 @@
+/** Defining Discretized Sinusoidal Wave Model 
+ *
+ *  \file   DSin.h
+ *  \author Akifumi Takahashi
+ *  \date   2019/Nov/28 ver.1 publish
+ *  \version 1.0.2019.Nov
+ *  \version 2.0.2019.Dec
+ */
+ 
+#ifndef DISCRETIZED_SINUSOIDAL_WAVE_MODEL_H
+#define DISCRETIZED_SINUSOIDAL_WAVE_MODEL_H
+#define _USE_MATH_DEFINES
+#include <cmath>
+
+#ifndef M_PI
+#define M_PI 3.141592
+#endif
+
+#include "mbed.h"
+/** \Class DISCRETIZED SINUSOIDAL WAVE MODEL
+ *
+ *  Model of a discretized sinusoidal wave whose value type is float, 
+ *  and the range is from (-1.0f * ampl) to (1.0f * ampl).
+ *
+ */
+class DSin
+{
+private:
+    /// Amplitude of sinusoidal wave (mA)
+    float m_ampl;
+    
+    /// Frequency of the wave (Hz)
+    uint16_t m_freq;
+    
+    /// Pulse width fineness of dicretization (us) 
+    /// pwth = 1000000 / freq / resolution_ofsin;
+    uint16_t m_pwth;
+    
+    float*      m_discretized_sin;
+    int32_t*    m_discretized_sin_p16m16;
+    
+    void init();
+
+public:
+    float const ampl_max;
+    uint16_t const freq_max;
+    uint16_t const resolution_ofsin; // = arg_resolution_ofsin below
+    
+    DSin(
+        uint16_t const arg_resolution_ofsin = 20
+    );
+    DSin(
+        float const arg_ampl,
+        uint16_t const arg_freq,
+        uint16_t const arg_resolution_ofsin = 20
+    );
+    
+    void setParam(
+        float const arg_ampl,
+        uint16_t const arg_freq
+    );
+    
+    void setAmplitude(
+        float const arg_ampl
+    );
+    
+    void setFrequency(
+        uint16_t const arg_freq
+    );
+    
+    float getValue();
+    int32_t getValue_p16m16();
+    
+    void getValueofSamplePoints(float[]);
+    
+    float    getAmplitude();    //inline
+    uint16_t getFrequency();    //inline
+    uint16_t getPulseWidth(); //inline
+    
+};
+
+
+inline float DSin::getAmplitude()
+{
+    return m_ampl;
+}
+
+inline uint16_t DSin::getFrequency()
+{
+    return m_freq;
+}
+
+inline uint16_t DSin::getPulseWidth()
+{
+    return m_pwth;
+}
+#endif
\ No newline at end of file