3 * Copyright 2004 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 #ifndef INCLUDED_GR_LFSR_32K_SOURCE_S_H
24 #define INCLUDED_GR_LFSR_32K_SOURCE_S_H
26 #include <gr_sync_block.h>
27 #include <gri_lfsr_32k.h>
29 class gr_lfsr_32k_source_s;
30 typedef boost::shared_ptr<gr_lfsr_32k_source_s> gr_lfsr_32k_source_s_sptr;
32 gr_lfsr_32k_source_s_sptr gr_make_lfsr_32k_source_s ();
35 * \brief LFSR pseudo-random source with period of 2^15 bits (2^11 shorts)
38 * This source is typically used along with gr_check_lfsr_32k_s to test
39 * the USRP using its digital loopback mode.
41 class gr_lfsr_32k_source_s : public gr_sync_block
43 friend gr_lfsr_32k_source_s_sptr gr_make_lfsr_32k_source_s ();
46 static const int BUFSIZE = 2048 - 1; // ensure pattern isn't packet aligned
48 short d_buffer[BUFSIZE];
50 gr_lfsr_32k_source_s ();
54 virtual int work (int noutput_items,
55 gr_vector_const_void_star &input_items,
56 gr_vector_void_star &output_items);