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/* -*- c++ -*- */
/*
* Copyright 2004 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_GR_CHECK_COUNTING_S_H
#define INCLUDED_GR_CHECK_COUNTING_S_H
#include <gr_core_api.h>
#include <gr_sync_block.h>
class gr_check_counting_s;
typedef boost::shared_ptr<gr_check_counting_s> gr_check_counting_s_sptr;
GR_CORE_API gr_check_counting_s_sptr gr_make_check_counting_s (bool do_32bit=false);
/*!
* \brief sink that checks if its input stream consists of a counting sequence.
* \param do_32bit expect an interleaved 32 bit counter in stead of 16 bit counter (default false)
* \ingroup sink_blk
*
* This sink is typically used to test the USRP "Counting Mode" or "Counting mode 32 bit".
*/
class GR_CORE_API gr_check_counting_s : public gr_sync_block
{
friend GR_CORE_API gr_check_counting_s_sptr gr_make_check_counting_s (bool do_32bit);
enum state {
SEARCHING, // searching for synchronization
LOCKED // is locked
};
state d_state;
unsigned int d_history; // bitmask of decisions
unsigned short d_current_count;
unsigned int d_current_count_32bit;
long d_total_errors;
long d_total_shorts;
bool d_do_32bit;
gr_check_counting_s (bool do_32bit);
void enter_SEARCHING ();
void enter_LOCKED ();
void right (){
d_history = (d_history << 1) | 0x1;
}
void wrong (){
d_history = (d_history << 1) | 0x0;
d_total_errors++;
}
bool right_three_times () { return (d_history & 0x7) == 0x7; }
bool wrong_three_times () { return (d_history & 0x7) == 0x0; }
void log_error (unsigned short expected, unsigned short actual);
void log_error_32bit (unsigned int expected, unsigned int actual);
int check_32bit (int noutput_items, unsigned short * in);
int check_16bit (int noutput_items, unsigned short * in);
public:
int work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* INCLUDED_GR_CHECK_COUNTING_S_H */
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