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MathMf.h
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MathMf.h
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/*
* Math library
*
* This source file can be found under:
* http://www.github.com/arduino-library/MathMf
*
* Please visit:
* http://www.microfarad.de
* http://www.github.com/microfarad-de
* http://www.github.com/arduino-library
*
* Copyright (C) 2019 Karim Hraibi (khraibi at gmail.com)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __MATHMF_H
#define __MATHMF_H
#include <Arduino.h>
/*
* FIR Filter class
*/
class FirFilterClass {
public:
void initialize (int16_t *memory, uint16_t size);
int16_t process (int16_t input);
private:
bool initialized = false;
int16_t *memory;
uint16_t size;
uint16_t index;
};
/*
* IIR Filter class
*/
class IirFilterClass {
public:
int16_t process (int16_t input, uint16_t size);
private:
int32_t output = 0;
};
/*
* Class for applying a hysteresis
*/
class HysteresisClass {
public:
/*
* Apply the hystereseis
*/
uint32_t apply (
uint32_t value, // Input value
int32_t threshold // Hysteresis threshold
);
private:
uint32_t lastValue = 0;
int8_t lastSign = 1;
};
/*
* Calculate the CRC checksum
*/
uint32_t crcCalc (uint8_t *buf, uint16_t bufSize);
/*
* return the sign of a value
*/
int8_t sgn (int val);
/*
* Caluclate least significant BCD digit
* out of a 2-digit decimal value
*/
uint8_t dec2bcdLow (uint8_t value);
/*
* Caluclate most significant BCD digit
* out of a 2-digit decimal value
*/
uint8_t dec2bcdHigh (uint8_t value);
#endif // __MATHMF_H