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/*
Copyright (C) 2005, 2006, 2007, 2008, 2009 Her Majesty the Queen in Right
of Canada (Communications Research Center Canada)
*/
/*
This file is part of ODR-DabMux.
ODR-DabMux 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 of the
License, or (at your option) any later version.
ODR-DabMux 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 ODR-DabMux. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdint.h>
#include <stdlib.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
class PrbsGenerator {
public:
void setup(long polynomial);
uint8_t step(void);
void rewind(void);
private:
/* Generate a table of matrix products to update a 32-bit PRBS
* generator. */
void gen_prbs_table(void);
/* Update a 32-bit PRBS generator eight bits at a time. */
unsigned long update_prbs(void);
/* Generate the weight table. */
void gen_weight_table(void);
/* Count the number of errors in a block of received data. */
size_t error_count(
unsigned char *rx_data,
int rx_data_length);
void gen_sequence(
unsigned char *tx_data,
int tx_data_length,
unsigned long polynomial);
// table of matrix products used to update a 32-bit PRBS generator
unsigned long prbs_table [4] [256];
// table of weights for 8-bit bytes
unsigned char weight[256];
// PRBS polynomial generator
unsigned long polynomial;
// PRBS generator polarity mask
unsigned char polarity_mask;
// PRBS accumulator
unsigned long accum;
};
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