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Deleting gps_telemetry.cc and gps_telemetry.h. Most of the functions were not used anywhere, the others have been moved to places in which make sense.

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git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@107 64b25241-fba3-4117-9849-534c7e92360d
This commit is contained in:
Carles Fernandez 2012-01-03 09:27:24 +00:00
parent 3ceef64d27
commit ce4ddd03e8
10 changed files with 58 additions and 153 deletions
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38
src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l1_ca_telemetry_decoder_cc.cc
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@ -33,16 +33,16 @@
* \todo Clean this code and move the telemetry definitions to GPS_L1_CA system definitions file
*/
#include "gps_l1_ca_telemetry_decoder_cc.h"
#include <iostream>
#include <sstream>
#include <bitset>
#include <gnuradio/gr_io_signature.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include "gps_l1_ca_telemetry_decoder_cc.h"
#include "control_message_factory.h"
#define _lrotl(X,N) ((X << N) ^ (X >> (32-N))) //!< Used in the parity check algorithm
using google::LogMessage;
@ -121,6 +121,38 @@ gps_l1_ca_telemetry_decoder_cc::~gps_l1_ca_telemetry_decoder_cc() {
}
bool gps_l1_ca_telemetry_decoder_cc::gps_word_parityCheck(unsigned int gpsword)
{
unsigned int d1,d2,d3,d4,d5,d6,d7,t,parity;
/* XOR as many bits in parallel as possible. The magic constants pick
up bits which are to be XOR'ed together to implement the GPS parity
check algorithm described in IS-GPS-200E. This avoids lengthy shift-
and-xor loops. */
d1 = gpsword & 0xFBFFBF00;
d2 = _lrotl(gpsword,1) & 0x07FFBF01;
d3 = _lrotl(gpsword,2) & 0xFC0F8100;
d4 = _lrotl(gpsword,3) & 0xF81FFE02;
d5 = _lrotl(gpsword,4) & 0xFC00000E;
d6 = _lrotl(gpsword,5) & 0x07F00001;
d7 = _lrotl(gpsword,6) & 0x00003000;
t = d1 ^ d2 ^ d3 ^ d4 ^ d5 ^ d6 ^ d7;
// Now XOR the 5 6-bit fields together to produce the 6-bit final result.
parity = t ^ _lrotl(t,6) ^ _lrotl(t,12) ^ _lrotl(t,18) ^ _lrotl(t,24);
parity = parity & 0x3F;
if (parity == (gpsword&0x3F))
return(true);
else
return(false);
}
int gps_l1_ca_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) {
int corr_value=0;
@ -247,7 +279,7 @@ int gps_l1_ca_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_i
{
d_GPS_frame_4bytes ^= 0x3FFFFFC0; // invert the data bits (using XOR)
}
if (gps_word_parityCheck(d_GPS_frame_4bytes)) {
if (gps_l1_ca_telemetry_decoder_cc::gps_word_parityCheck(d_GPS_frame_4bytes)) {
memcpy(&d_GPS_FSM.d_GPS_frame_4bytes,&d_GPS_frame_4bytes,sizeof(char)*4);
d_GPS_FSM.d_preamble_time_ms=d_preamble_time_seconds*1000.0;
d_GPS_FSM.Event_gps_word_valid();

14
src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l1_ca_telemetry_decoder_cc.h
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@ -31,15 +31,17 @@
#ifndef GNSS_SDR_GPS_L1_CA_TELEMETRY_DECODER_CC_H
#define GNSS_SDR_GPS_L1_CA_TELEMETRY_DECODER_CC_H
#include "GPS_L1_CA.h"
#include "gps_l1_ca_subframe_fsm.h"
#include "concurrent_queue.h"
#include <fstream>
#include <bitset>
#include <gnuradio/gr_block.h>
//#include <gnuradio/gr_sync_block.h>
#include <gnuradio/gr_msg_queue.h>
#include "GPS_L1_CA.h"
#include "gps_telemetry.h"
#include "gps_l1_ca_subframe_fsm.h"
#include "concurrent_queue.h"
//#include <gnuradio/gr_sync_block.h>
class gps_l1_ca_telemetry_decoder_cc;
@ -64,6 +66,8 @@ private:
gps_l1_ca_telemetry_decoder_cc(unsigned int satellite, long if_freq, long fs_in,unsigned
int vector_length, gr_msg_queue_sptr queue, bool dump);
bool gps_word_parityCheck(unsigned int gpsword);
// constants
unsigned short int d_preambles_bits[8];

1
src/algorithms/telemetry_decoder/libs/gps_l1_ca_subframe_fsm.h
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@ -45,7 +45,6 @@
#include <iostream>
#include <cstring>
#include "GPS_L1_CA.h"
#include "gps_telemetry.h"
#include "gps_navigation_message.h"
namespace sc = boost::statechart;

2
src/core/system_parameters/GPS_L1_CA.h
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@ -76,7 +76,7 @@ const int GPS_WORD_BITS=30; //!< Number of bits per word in t
#define num_of_slices(x) sizeof(x)/sizeof(bits_slice)
/*!
* \brief Navigation message bits slice structure: A portion of bits is indicated by

12
src/core/system_parameters/gps_navigation_message.cc
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@ -32,6 +32,10 @@
#include "gps_navigation_message.h"
#define num_of_slices(x) sizeof(x)/sizeof(bits_slice)
void gps_navigation_message::reset()
{
d_TOW=0;
@ -129,6 +133,13 @@ gps_navigation_message::gps_navigation_message()
void gps_navigation_message::print_gps_word_bytes(unsigned int GPS_word)
{
std::cout << " Word =";
std::cout<<std::bitset<32>(GPS_word);
std::cout<<std::endl;
}
bool gps_navigation_message::read_navigation_bool(std::bitset<GPS_SUBFRAME_BITS> bits, const bits_slice *slices)
@ -154,6 +165,7 @@ bool gps_navigation_message::read_navigation_bool(std::bitset<GPS_SUBFRAME_BITS>
unsigned long int gps_navigation_message::read_navigation_unsigned(std::bitset<GPS_SUBFRAME_BITS> bits, const bits_slice *slices, int num_of_slices)
{
unsigned long int value;
value=0;
for (int i=0;i<num_of_slices;i++)
{

1
src/core/system_parameters/gps_navigation_message.h
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@ -58,6 +58,7 @@ private:
unsigned long int read_navigation_unsigned(std::bitset<GPS_SUBFRAME_BITS> bits, const bits_slice *slices, int num_of_slices);
signed long int read_navigation_signed(std::bitset<GPS_SUBFRAME_BITS> bits, const bits_slice *slices, int num_of_slices);
bool read_navigation_bool(std::bitset<GPS_SUBFRAME_BITS> bits, const bits_slice *slices);
void print_gps_word_bytes(unsigned int GPS_word);
/*
* Accounts for the beginning or end of week crossover

99
src/core/system_parameters/gps_telemetry.cc
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@ -1,99 +0,0 @@
/*!
* \file gps_telemetry.cc
* \brief GPS L1 C/A telemetry processing
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2011 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR 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.
*
* GNSS-SDR 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 GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "gps_telemetry.h"
#include <iostream>
#include <bitset>
#include <cstring>
bool gps_word_parityCheck(unsigned int gpsword)
{
unsigned int d1,d2,d3,d4,d5,d6,d7,t,parity;
/* XOR as many bits in parallel as possible. The magic constants pick
up bits which are to be XOR'ed together to implement the GPS parity
check algorithm described in ICD-GPS-200. This avoids lengthy shift-
and-xor loops. */
d1 = gpsword & 0xFBFFBF00;
d2 = _lrotl(gpsword,1) & 0x07FFBF01;
d3 = _lrotl(gpsword,2) & 0xFC0F8100;
d4 = _lrotl(gpsword,3) & 0xF81FFE02;
d5 = _lrotl(gpsword,4) & 0xFC00000E;
d6 = _lrotl(gpsword,5) & 0x07F00001;
d7 = _lrotl(gpsword,6) & 0x00003000;
t = d1 ^ d2 ^ d3 ^ d4 ^ d5 ^ d6 ^ d7;
// Now XOR the 5 6-bit fields together to produce the 6-bit final result.
parity = t ^ _lrotl(t,6) ^ _lrotl(t,12) ^ _lrotl(t,18) ^ _lrotl(t,24);
parity = parity & 0x3F;
if (parity == (gpsword&0x3F))
return(true);
else
return(false);
}
char bit_mask(int num_bits)
{
char mask;
mask=1;
for (int i=0;i<(num_bits-1);i++)
{
mask<<=1;
mask++;
}
return mask;
}
char bit_select(int num_bit)
{
char mask;
mask=1;
for (int i=0;i<(num_bit-1);i++)
{
mask<<=1;
}
return mask;
}
void print_gps_word_bytes(unsigned int GPS_word)
{
std::cout << " Word =";
std::cout<<std::bitset<32>(GPS_word);
std::cout<<std::endl;
}
/*----------------------------------------------------------------------------------------------*/

42
src/core/system_parameters/gps_telemetry.h
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@ -1,42 +0,0 @@
/*!
* \file gps_telemetry.h
* \brief GPS L1 C/A telemetry processing
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2011 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR 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.
*
* GNSS-SDR 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 GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GNSS_SDR_GPS_TELEMETRY_H_
#define GNSS_SDR_GPS_TELEMETRY_H_
#define _lrotl(X,N) ((X << N) ^ (X >> (32-N))) //!< Used in the parity check algorithm
#include "GPS_L1_CA.h"
bool gps_word_parityCheck(unsigned int gpsword);
char bit_mask(int num_bits);
char bit_select(int num_bit);
void print_gps_word_bytes(unsigned int GPS_word);
#endif

1
src/core/system_parameters/jamfile.jam
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@ -1,4 +1,3 @@
project : build-dir ../../../build ;
obj gps_navigation_message : gps_navigation_message.cc ;
obj gps_telemetry : gps_telemetry.cc ;

1
src/main/jamfile.jam
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@ -51,7 +51,6 @@ exe gnss-sdr : main.cc
../core/receiver//gnss_block_factory
../core/receiver//gnss_flowgraph
../core/system_parameters//gps_navigation_message
../core/system_parameters//gps_telemetry
../..//gflags
../..//glog
../..//gnuradio-core ;