GNU Radio 3.5.3.1 C++ API
pager_flex_sync.h
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/*
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* Copyright 2006 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio 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, or (at your option)
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* any later version.
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*
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* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef INCLUDED_PAGER_FLEX_SYNC_H
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#define INCLUDED_PAGER_FLEX_SYNC_H
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#include <
pager_api.h
>
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#include <
gr_block.h
>
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class
pager_flex_sync
;
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typedef
boost::shared_ptr<pager_flex_sync>
pager_flex_sync_sptr
;
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typedef
std::vector<gr_int64>
gr_int64_vector
;
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PAGER_API
pager_flex_sync_sptr
pager_make_flex_sync
();
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/*!
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* \brief flex sync description
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* \ingroup pager_blk
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*/
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class
PAGER_API
pager_flex_sync
:
public
gr_block
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{
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private
:
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// Constructors
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friend
PAGER_API
pager_flex_sync_sptr
pager_make_flex_sync
();
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pager_flex_sync
();
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// State machine transitions
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void
enter_idle();
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void
enter_syncing();
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void
enter_sync1();
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void
enter_sync2();
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void
enter_data();
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int
index_avg(
int
start,
int
end);
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bool
test_sync(
unsigned
char
sym);
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void
parse_fiw();
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int
output_symbol(
unsigned
char
sym);
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// Simple state machine
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enum
state_t { ST_IDLE, ST_SYNCING, ST_SYNC1, ST_SYNC2, ST_DATA };
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state_t d_state;
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int
d_index;
// Index into current baud
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int
d_start;
// Start of good sync
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int
d_center;
// Center of bit
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int
d_end;
// End of good sync
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int
d_count;
// Bit counter
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int
d_mode;
// Current packet mode
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int
d_baudrate;
// Current decoding baud rate
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int
d_levels;
// Current decoding levels
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int
d_spb;
// Current samples per baud
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bool
d_hibit;
// Alternating bit indicator for 3200 bps
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gr_int32
d_fiw;
// Frame information word
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int
d_frame;
// Current FLEX frame
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int
d_cycle;
// Current FLEX cycle
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int
d_unknown1;
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int
d_unknown2;
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unsigned
char
d_bit_a;
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unsigned
char
d_bit_b;
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unsigned
char
d_bit_c;
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unsigned
char
d_bit_d;
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unsigned
char
*d_phase_a;
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unsigned
char
*d_phase_b;
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unsigned
char
*d_phase_c;
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unsigned
char
*d_phase_d;
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gr_int64_vector
d_sync;
// Trial synchronizers
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public
:
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void
forecast
(
int
noutput_items,
gr_vector_int
&inputs_required);
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int
general_work
(
int
noutput_items,
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gr_vector_int
&ninput_items,
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gr_vector_const_void_star
&input_items,
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gr_vector_void_star
&output_items);
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};
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#endif
/* INCLUDED_PAGER_FLEX_SYNC_H */
gr-pager
lib
pager_flex_sync.h
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