90 lines
3.5 KiB
C++
90 lines
3.5 KiB
C++
/* -*- c++ -*- */
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/*
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* gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
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*
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* Copyright (C) 2016, 2017, 2018
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* Libre Space Foundation <http://librespacefoundation.org/>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_SATNOGS_AX25_DECODER_BM_H
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#define INCLUDED_SATNOGS_AX25_DECODER_BM_H
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#include <satnogs/api.h>
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#include <gnuradio/sync_block.h>
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namespace gr
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{
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namespace satnogs
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{
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/*!
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* \brief AX.25 decoder that supports the legacy hardware radios.
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*
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* This block takes as input a quadrature demodulated bit stream.
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* Each byte should contains only one bit of information at the LSB.
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*
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* The block will try to find an AX.25 frame. If the frame pass the
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* CRC check then a blob PMT message is produced at the message output
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* indicated with name 'out'. Otherwise if the frame did not pass the
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* CRC check or the size was invalid, a blob PMT message is generated at
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* the output port with the name 'fail'. This will help to recover at least
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* some bytes from a corrupted message.
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*
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* The block also supports destination callsign check. Only frames with
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* the right destination Callsign will be accepted. This feature can be
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* disabled using the promisc parameter.
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*
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* \ingroup satnogs
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*
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*/
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class SATNOGS_API ax25_decoder_bm : virtual public gr::sync_block
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{
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public:
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typedef boost::shared_ptr<ax25_decoder_bm> sptr;
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/**
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* This block takes as input a quadrature demodulated bit stream.
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* Each byte should contains only one bit of information at the LSB.
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*
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* The block will try to find an AX.25 frame. If the frame pass the
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* CRC check then a blob PMT message is produced at the message output
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* indicated with name 'pdu'. Otherwise if the frame did not pass the
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* CRC check or the size was invalid, a blob PMT message is generated at
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* the output port with the name 'failed_pdu'.
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* This will help to recover at least some bytes from a corrupted message.
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*
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* The block also supports destination callsign check. Only frames with
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* the right destination Callsign will be accepted. This feature can be
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* disabled using the promisc parameter.
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* @param addr the Callsign of the receiver
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* @param ssid the SSID of the receiver
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* @param promisc if set to yes, the Callsign check is disabled
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* @param descramble if set to yes, the data will be descrambled prior
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* decoding using the G3RUH self-synchronizing descrambler.
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* @param max_frame_len the maximum allowed frame length
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* @return
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*/
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static sptr
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make (const std::string& addr, uint8_t ssid, bool promisc = false,
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bool descramble = true, size_t max_frame_len = 512);
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};
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} // namespace satnogs
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} // namespace gr
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#endif /* INCLUDED_SATNOGS_AX25_DECODER_BM_H */
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