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Added a block for generating Access Bursts

This commit is contained in:
Piotr Krysik 2017-11-29 16:39:22 +01:00
parent 2f0406b76d
commit 2344483869
9 changed files with 249 additions and 8 deletions
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1
grc/gsm_block_tree.xml
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@ -27,6 +27,7 @@
<block>gsm_txtime_setter</block>
<block>gsm_gmsk_mod</block>
<block>gsm_preprocess_tx_burst</block>
<block>gsm_gen_test_ab</block>
</cat>
<cat>
<name>Logical channels demapping</name>

8
grc/transmitter/CMakeLists.txt
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@ -19,7 +19,9 @@
install(FILES
gsm_gmsk_mod.xml
gsm_txtime_bursts_tagger.xml
gsm_txtime_setter.xml
gsm_preprocess_tx_burst.xml DESTINATION share/gnuradio/grc/blocks
gsm_txtime_bursts_tagger.xml
gsm_txtime_setter.xml
gsm_preprocess_tx_burst.xml
gsm_gen_test_ab.xml
DESTINATION share/gnuradio/grc/blocks
)

19
grc/transmitter/gsm_gen_test_ab.xml Normal file
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@ -0,0 +1,19 @@
<?xml version="1.0"?>
<block>
<name>Gen Test AB</name>
<key>gsm_gen_test_ab</key>
<import>import grgsm</import>
<make>grgsm.gen_test_ab()</make>
<sink>
<name>bursts_in</name>
<type>message</type>
<optional>1</optional>
</sink>
<source>
<name>bursts_out</name>
<type>message</type>
<optional>1</optional>
</source>
</block>

1
include/grgsm/transmitter/CMakeLists.txt
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@ -23,5 +23,6 @@
install(FILES
txtime_setter.h
preprocess_tx_burst.h
gen_test_ab.h
DESTINATION include/grgsm/transmitter
)

60
include/grgsm/transmitter/gen_test_ab.h Normal file
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@ -0,0 +1,60 @@
/* -*- c++ -*- */
/* @file
* @author Piotr Krysik <ptrkrysik@gmail.com>
* @section LICENSE
*
* Gr-gsm 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.
*
* Gr-gsm 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 gr-gsm; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef INCLUDED_GSM_GEN_TEST_AB_H
#define INCLUDED_GSM_GEN_TEST_AB_H
#include <grgsm/api.h>
#include <gnuradio/block.h>
namespace gr {
namespace gsm {
/*!
* \brief A block that does preprocessing tasks before sending bursts to modulator.
* \ingroup gsm
*
* Currently it removes GSMTAP header from a burst and puts it in first part of PDU
* pair and removes tailing zeros from Access Bursts coming from TRX interface.
*/
class GRGSM_API gen_test_ab : virtual public gr::block
{
public:
typedef boost::shared_ptr<gen_test_ab> sptr;
/*!
* \brief Return a shared_ptr to a new instance of gsm::gen_test_ab.
*
* To avoid accidental use of raw pointers, gsm::gen_test_ab's
* constructor is in a private implementation
* class. gsm::gen_test_ab::make is the public interface for
* creating new instances.
*/
static sptr make();
};
} // namespace gsm
} // namespace gr
#endif /* INCLUDED_GSM_GEN_TEST_AB_H */

1
lib/transmitter/CMakeLists.txt
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@ -20,4 +20,5 @@
add_sources(
txtime_setter_impl.cc
preprocess_tx_burst_impl.cc
gen_test_ab_impl
)

107
lib/transmitter/gen_test_ab_impl.cc Normal file
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@ -0,0 +1,107 @@
/* -*- c++ -*- */
/* @file
* @author Piotr Krysik <ptrkrysik@gmail.com>
* @section LICENSE
*
* Gr-gsm 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.
*
* Gr-gsm 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 gr-gsm; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gnuradio/io_signature.h>
#include <grgsm/gsmtap.h>
#include <grgsm/gsm_constants.h>
#include "gen_test_ab_impl.h"
namespace gr {
namespace gsm {
static uint8_t rach_synch_seq[] = {
0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1,
1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0 ,
1, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0,
};
// static uint8_t AB[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
// static uint8_t AB[] = {0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1};
// static uint8_t AB[] = { 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1};
static uint8_t AB[] = {1,1,1,1,1,1,1,1,1,0,1,1,0,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0,0,1,0,1,0,1,0,1,1,1,0,0,0,0,1,1,1,0,0,1,0,0,0,1,0,1,0,1,0,0,1,0,1,0,1,1,0,1,1,0,0,1,0,1,0,0,0,1,1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};
gen_test_ab::sptr
gen_test_ab::make()
{
return gnuradio::get_initial_sptr
(new gen_test_ab_impl());
}
/*
* The private constructor
*/
gen_test_ab_impl::gen_test_ab_impl()
: gr::block("gen_test_ab",
gr::io_signature::make(0, 0, 0),
gr::io_signature::make(0, 0, 0))
{
message_port_register_in(pmt::intern("bursts_in"));
message_port_register_out(pmt::intern("bursts_out"));
set_msg_handler(pmt::intern("bursts_in"), boost::bind(&gen_test_ab_impl::generate_ab, this, _1));
}
/*
* Our virtual destructor.
*/
gen_test_ab_impl::~gen_test_ab_impl()
{
}
void gen_test_ab_impl::generate_ab(pmt::pmt_t burst)
{
uint8_t buf[sizeof(gsmtap_hdr) + 148];
struct gsmtap_hdr *tap_header = (struct gsmtap_hdr *) buf;
uint8_t *access_burst = buf + sizeof(gsmtap_hdr);
// memset(access_burst, 0, 8); /* TB */
// memcpy(access_burst + 8, rach_synch_seq, 41); /* sync seq */
// memcpy(access_burst + 49, AB, 36); /* payload */
// memset(access_burst + 85, 0, 63); /* TB + GP */
memcpy(access_burst, AB, 148);
gsmtap_hdr * header = (gsmtap_hdr *)(pmt::blob_data(pmt::cdr(burst)));
uint32_t frame_nr = be32toh(header->frame_number);
frame_nr = (frame_nr+51)% (26*51*2048);
tap_header->version = GSMTAP_VERSION;
tap_header->hdr_len = sizeof(gsmtap_hdr) / 4;
tap_header->type = GSMTAP_TYPE_UM_BURST;
tap_header->sub_type = GSMTAP_BURST_ACCESS;
tap_header->frame_number = htobe32(frame_nr);
tap_header->timeslot = header->timeslot;
tap_header->arfcn = 0;
pmt::pmt_t blob = pmt::make_blob(buf, sizeof(gsmtap_hdr) + BURST_SIZE);
pmt::pmt_t pdu_header = pmt::make_dict();
pmt::pmt_t new_msg = pmt::cons(pdu_header, blob);
message_port_pub(pmt::intern("bursts_out"), new_msg);
}
} /* namespace gsm */
} /* namespace gr */

47
lib/transmitter/gen_test_ab_impl.h Normal file
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@ -0,0 +1,47 @@
/* -*- c++ -*- */
/* @file
* @author Piotr Krysik <ptrkrysik@gmail.com>
* @section LICENSE
*
* Gr-gsm 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.
*
* Gr-gsm 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 gr-gsm; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef INCLUDED_GSM_GEN_TEST_AB_IMPL_H
#define INCLUDED_GSM_GEN_TEST_AB_IMPL_H
#include <grgsm/transmitter/gen_test_ab.h>
#include <grgsm/misc_utils/time_spec.h>
#include <grgsm/misc_utils/fn_time.h>
namespace gr {
namespace gsm {
class gen_test_ab_impl : public gen_test_ab
{
private:
void generate_ab(pmt::pmt_t burst);
public:
gen_test_ab_impl();
~gen_test_ab_impl();
};
} // namespace gsm
} // namespace gr
#endif /* INCLUDED_GSM_GEN_TEST_AB_IMPL_H */

13
swig/grgsm_swig.i
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@ -1,7 +1,7 @@
/* -*- c++ -*- */
/*
* @file
* @author (C) 2014 by Piotr Krysik <ptrkrysik@gmail.com>
* @author (C) 2014-2017 by Piotr Krysik <ptrkrysik@gmail.com>
* @section LICENSE
*
* Gr-gsm is free software; you can redistribute it and/or modify
@ -72,6 +72,7 @@
#include "grgsm/misc_utils/fn_time.h"
#include "grgsm/transmitter/txtime_setter.h"
#include "grgsm/transmitter/preprocess_tx_burst.h"
#include "grgsm/transmitter/gen_test_ab.h"
#include "grgsm/misc_utils/trx_burst_if.h"
%}
@ -144,10 +145,6 @@ GR_SWIG_BLOCK_MAGIC2(gsm, msg_to_tag);
GR_SWIG_BLOCK_MAGIC2(gsm, controlled_fractional_resampler_cc);
%include "grgsm/misc_utils/extract_cmc.h"
GR_SWIG_BLOCK_MAGIC2(gsm, extract_cmc);
%include "grgsm/misc_utils/trx_burst_if.h"
GR_SWIG_BLOCK_MAGIC2(gsm, trx_burst_if);
%include "grgsm/qa_utils/burst_sink.h"
GR_SWIG_BLOCK_MAGIC2(gsm, burst_sink);
%include "grgsm/qa_utils/burst_source.h"
@ -185,3 +182,9 @@ GR_SWIG_BLOCK_MAGIC2(gsm, message_sink);
GR_SWIG_BLOCK_MAGIC2(gsm, txtime_setter);
%include "grgsm/transmitter/preprocess_tx_burst.h"
GR_SWIG_BLOCK_MAGIC2(gsm, preprocess_tx_burst);
%include "grgsm/transmitter/gen_test_ab.h"
GR_SWIG_BLOCK_MAGIC2(gsm, gen_test_ab);
%include "grgsm/misc_utils/trx_burst_if.h"
GR_SWIG_BLOCK_MAGIC2(gsm, trx_burst_if);