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/* -*- c++ -*- */
/*
* Copyright 2021 Cesar Martinez.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*
*/
#ifndef INCLUDED_DIGITAL_CRC16_ASYNC_BB_H
#define INCLUDED_DIGITAL_CRC16_ASYNC_BB_H
#include <gnuradio/block.h>
#include <gnuradio/digital/api.h>
namespace gr {
namespace digital {
/*!
* \brief Byte-stream CRC block for async messages
* \ingroup packet_operators_blk
*
* \details
*
* Processes packets (as async PDU messages) for CRC16. The \p
* check parameter determines if the block acts to check and strip
* the CRC or to calculate and append the CRC16.
*
* The input PDU is expected to be a message of packet bytes.
*
* When using check mode, if the CRC passes, the output is a
* payload of the message with the CRC stripped, so the output
* will be 2 bytes smaller than the input.
*
* When using calculate mode (check == false), then the CRC is
* calculated on the PDU and appended to it. The output is then 2
* bytes longer than the input.
*
* This block implements the CRC16 using the Boost crc_optimal
* class for 16-bit CRCs with the standard generator 0x1021.
*/
class DIGITAL_API crc16_async_bb : virtual public block
{
public:
typedef std::shared_ptr<crc16_async_bb> sptr;
/*!
* \param check Set to true if you want to check CRC, false to create CRC.
*/
static sptr make(bool check = false);
};
} // namespace digital
} // namespace gr
#endif /* INCLUDED_DIGITAL_CRC16_ASYNC_BB_H */
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