mirror of
https://github.com/ETLCPP/etl.git
synced 2026-06-28 05:18:43 +08:00
109 lines
3.3 KiB
C++
109 lines
3.3 KiB
C++
///\file
|
|
|
|
/******************************************************************************
|
|
The MIT License(MIT)
|
|
|
|
Embedded Template Library.
|
|
https://github.com/ETLCPP/etl
|
|
http://www.etlcpp.com
|
|
|
|
Copyright(c) 2014 jwellbelove
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files(the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions :
|
|
|
|
The above copyright notice and this permission notice shall be included in all
|
|
copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
SOFTWARE.
|
|
******************************************************************************/
|
|
|
|
#ifndef __ETL_CRC16_KERMIT__
|
|
#define __ETL_CRC16_KERMIT__
|
|
|
|
#include <stdint.h>
|
|
#include <iterator>
|
|
|
|
#include "platform.h"
|
|
#include "frame_check_sequence.h"
|
|
|
|
#if defined(ETL_COMPILER_KEIL)
|
|
#pragma diag_suppress 1300
|
|
#endif
|
|
|
|
///\defgroup crc16_kermit 16 bit CRC Kermit calculation
|
|
///\ingroup crc
|
|
|
|
namespace etl
|
|
{
|
|
//***************************************************************************
|
|
/// CRC Kermit table
|
|
/// \ingroup crc
|
|
//***************************************************************************
|
|
extern const uint16_t CRC_KERMIT[];
|
|
|
|
//***************************************************************************
|
|
/// CRC16 Kermit policy.
|
|
/// Calculates CRC16 Kermit using polynomial 0x1021
|
|
//***************************************************************************
|
|
struct crc_policy_16_kermit
|
|
{
|
|
typedef uint16_t value_type;
|
|
|
|
inline uint16_t initial() const
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
inline uint16_t add(uint16_t crc, uint8_t value) const
|
|
{
|
|
return (crc >> 8) ^ CRC_KERMIT[(crc ^ value) & 0xFF];
|
|
}
|
|
|
|
inline uint16_t final(uint16_t crc) const
|
|
{
|
|
return crc;
|
|
}
|
|
};
|
|
|
|
//*************************************************************************
|
|
/// CRC16 Kermit
|
|
//*************************************************************************
|
|
class crc16_kermit : public etl::frame_check_sequence<etl::crc_policy_16_kermit>
|
|
{
|
|
public:
|
|
|
|
//*************************************************************************
|
|
/// Default constructor.
|
|
//*************************************************************************
|
|
crc16_kermit()
|
|
{
|
|
this->reset();
|
|
}
|
|
|
|
//*************************************************************************
|
|
/// Constructor from range.
|
|
/// \param begin Start of the range.
|
|
/// \param end End of the range.
|
|
//*************************************************************************
|
|
template<typename TIterator>
|
|
crc16_kermit(TIterator begin, const TIterator end)
|
|
{
|
|
this->reset();
|
|
this->add(begin, end);
|
|
}
|
|
};
|
|
}
|
|
|
|
#endif
|