mirror of
https://github.com/TomHarte/CLK.git
synced 2024-11-12 22:06:03 +00:00
41 lines
829 B
C++
41 lines
829 B
C++
//
|
|
// CRC.hpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 18/09/2016.
|
|
// Copyright © 2016 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#ifndef CRC_hpp
|
|
#define CRC_hpp
|
|
|
|
#include <cstdint>
|
|
|
|
namespace NumberTheory {
|
|
|
|
class CRC16 {
|
|
public:
|
|
CRC16(uint16_t polynomial, uint16_t reset_value) :
|
|
reset_value_(reset_value), value_(reset_value), polynomial_(polynomial) {}
|
|
|
|
inline void reset() { value_ = reset_value_; }
|
|
inline void add(uint8_t value) {
|
|
// TODO: go table based
|
|
value_ ^= (uint16_t)value << 8;
|
|
for(int c = 0; c < 8; c++)
|
|
{
|
|
uint16_t exclusive_or = (value_&0x8000) ? polynomial_ : 0x0000;
|
|
value_ = (uint16_t)(value_ << 1) ^ exclusive_or;
|
|
}
|
|
}
|
|
inline uint16_t get_value() { return value_; }
|
|
|
|
private:
|
|
uint16_t reset_value_, polynomial_;
|
|
uint16_t value_;
|
|
};
|
|
|
|
}
|
|
|
|
#endif /* CRC_hpp */
|