3 * Copyright 2006 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
23 GR_SWIG_BLOCK_MAGIC(gr,correlate_access_code_bb);
26 * \param access_code is represented with 1 byte per bit, e.g., "010101010111000100"
27 * \param threshold maximum number of bits that may be wrong
29 gr_correlate_access_code_bb_sptr
30 gr_make_correlate_access_code_bb (const std::string &access_code, int threshold)
31 throw(std::out_of_range);
34 * \brief Examine input for specified access code, one bit at a time.
37 * input: stream of bits, 1 bit per input byte (data in LSB)
38 * output: stream of bits, 2 bits per output byte (data in LSB, flag in next higher bit)
40 * Each output byte contains two valid bits, the data bit, and the
41 * flag bit. The LSB (bit 0) is the data bit, and is the original
42 * input data, delayed 64 bits. Bit 1 is the
43 * flag bit and is 1 if the corresponding data bit is the first data
44 * bit following the access code. Otherwise the flag bit is 0.
46 class gr_correlate_access_code_bb : public gr_sync_block
48 friend gr_correlate_access_code_bb_sptr
49 gr_make_correlate_access_code_bb (const std::string &access_code, int threshold);
51 gr_correlate_access_code_bb(const std::string &access_code, int threshold);
54 ~gr_correlate_access_code_bb();
57 * \param access_code is represented with 1 byte per bit, e.g., "010101010111000100"
59 bool set_access_code (const std::string &access_code);