Add gr-adsbtx as a proper packaged gnuradio block
Using that block you can feed ascii-encoded ADS-B messages via TCP into gnuradio, which will then take care of encoding/transmitting the respective bursts.
This commit is contained in:
parent
99c31f0921
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15
README
15
README
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@ -1,5 +1,5 @@
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Osmocom ADS-B generator/transmitter
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(C) 2014 by Harald Welte <laforge@gnumonks.org>
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(C) 2014-2015 by Harald Welte <laforge@gnumonks.org>
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======================================================================
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adsb_gen - ADS-B / Mode-S transmitter
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@ -17,6 +17,10 @@ This is very early PoC code and can probably do with lots of
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improvements, particularly related to the modulation depth, transmit
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power, etc.
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There are two ways of using the project:
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1) Old style (with gnuradio before it had PDU abstraction)
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The idea is as follows:
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* provide a text file with ADS-B sentences in regular encoding like
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@ -35,3 +39,12 @@ The idea is as follows:
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* the '-p' parameter can be used to configure the gap between subsequent
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ADS-B sentences (specified in microseconds). The default is 1s.
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2) New style (with gnuradio 3.7)
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* Build the gr-adsbtx module like usual using cmake/make
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* Run the adsb_gen.grc flow graph in gnuradio-companiion
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* Connect to localhost port 52002 and send ADS-B sentences
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to it
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File diff suppressed because it is too large
Load Diff
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@ -90,7 +90,7 @@ find_package(Doxygen)
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# components required to the list of GR_REQUIRED_COMPONENTS (in all
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# caps such as FILTER or FFT) and change the version to the minimum
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# API compatible version required.
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set(GR_REQUIRED_COMPONENTS RUNTIME)
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set(GR_REQUIRED_COMPONENTS RUNTIME PMT BLOCKS)
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find_package(Gnuradio "3.7.2" REQUIRED)
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if(NOT CPPUNIT_FOUND)
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@ -18,5 +18,6 @@
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# Boston, MA 02110-1301, USA.
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install(FILES
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adsbtx_AdsbEncoder.xml
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DESTINATION share/gnuradio/grc/blocks
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)
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@ -0,0 +1,50 @@
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/* -*- c++ -*- */
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/*
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* Copyright 2013 <+YOU OR YOUR COMPANY+>.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef INCLUDED_ADSBTX_ADSBENCODER_H
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#define INCLUDED_ADSBTX_ADSBENCODER_H
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#include <adsbtx/api.h>
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#include <gnuradio/blocks/api.h>
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#include <gnuradio/blocks/pdu.h>
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#include <gnuradio/block.h>
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namespace gr {
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namespace adsbtx {
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/*!
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* \brief Builds ADSB Frame
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* \ingroup adsbtx
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*
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*/
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class ADSBTX_API AdsbEncoder : virtual public block
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{
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public:
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typedef boost::shared_ptr<AdsbEncoder> sptr;
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static sptr make(void);
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};
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} // namespace adsbtx
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} // namespace gr
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#endif /* INCLUDED_ADSBTX_BUILD_FRAME_H */
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@ -22,5 +22,6 @@
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########################################################################
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install(FILES
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api.h
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AdsbEncoder.h
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DESTINATION include/adsbtx
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)
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@ -22,9 +22,9 @@
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#ifndef INCLUDED_ADSBTX_API_H
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#define INCLUDED_ADSBTX_API_H
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#include <gnuradio/attributes.h>
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#include <gruel/attributes.h>
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#ifdef gnuradio_adsbtx_EXPORTS
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#ifdef gnuradio_ADSBTX_EXPORTS
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# define ADSBTX_API __GR_ATTR_EXPORT
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#else
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# define ADSBTX_API __GR_ATTR_IMPORT
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/* -*- c++ -*- */
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/*
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* Copyright 2015 Harald Welte <hwelte@sysmocom.de>.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <gnuradio/io_signature.h>
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#include <gnuradio/block.h>
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#include <gnuradio/blocks/pdu.h>
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#include "AdsbEncoder_impl.h"
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extern "C" {
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#include <osmocom/core/bits.h>
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#include <osmocom/core/utils.h>
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#define PREAMBLE_LEN 8
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#define SHORT_LEN 56
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#define LONG_LEN 112
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#define OUTBUF_SIZE ((LONG_LEN+PREAMBLE_LEN)*2)
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#define SPACE 0xff
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static const ubit_t preamble[PREAMBLE_LEN] = { 1, 1, SPACE, 0, 0, SPACE, SPACE, SPACE };
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namespace gr {
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namespace adsbtx {
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AdsbEncoder::sptr
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AdsbEncoder::make()
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{
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return gnuradio::get_initial_sptr
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(new AdsbEncoder_impl());
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}
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/*
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* The private constructor
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*/
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AdsbEncoder_impl::AdsbEncoder_impl()
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: block("ADS-B Payload to Symbols Encoder",
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io_signature::make(0, 0, 0),
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io_signature::make(0, 0, 0))
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{
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message_port_register_out(pmt::mp("pdus"));
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message_port_register_in(pmt::mp("pdus"));
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set_msg_handler(pmt::mp("pdus"), boost::bind(&AdsbEncoder_impl::handle_msg, this, _1));
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#if 0
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if (d_num_lead_in_syms) {
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/* round up to the next byte boundary */
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if (d_num_lead_in_syms % 8)
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d_num_lead_in_syms += d_num_lead_in_syms % 8;
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/* empty vector for lead-in */
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d_lead_in_bytes = pmt::make_u8vector(d_num_lead_in_syms/8, 0);
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}
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#endif
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}
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/*
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* Our virtual destructor.
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*/
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AdsbEncoder_impl::~AdsbEncoder_impl()
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{
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}
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/* encode Pulse Position Modulation */
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static int ppm_encode(ubit_t *out, const ubit_t *in, unsigned int num_in)
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{
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int i;
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int j = 0;
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for (i = 0; i < num_in; i++) {
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switch (in[i]) {
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case 0:
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out[j++] = 0;
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out[j++] = 1;
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break;
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case 1:
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out[j++] = 1;
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out[j++] = 0;
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break;
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case SPACE:
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out[j++] = 0;
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out[j++] = 0;
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break;
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default:
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return -1;
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}
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}
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return 0;
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}
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static int modes_encode_from_bin(ubit_t *out, const pbit_t *bin, unsigned int num_bits)
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{
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ubit_t bitbuf[PREAMBLE_LEN+LONG_LEN];
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int rc, out_len;
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printf("from_bin(num_bits=%u)\n", num_bits);
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/* assemble the un-encoded bits of the entire message */
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memcpy(bitbuf, preamble, sizeof(preamble));
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rc = osmo_pbit2ubit(bitbuf+sizeof(preamble), bin, num_bits);
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printf("sym=%s\n", osmo_ubit_dump(bitbuf, num_bits+sizeof(preamble)));
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/* encode using pulse-position modulation */
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rc = ppm_encode(out, bitbuf, num_bits+sizeof(preamble));
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if (rc < 0) {
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fprintf(stderr, "Error during ppm_encode\n");
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return rc;
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}
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out_len = 2*(num_bits + sizeof(preamble));
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printf("out=%s\n", osmo_ubit_dump(out, out_len));
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return out_len;
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}
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/* obtain last char of string */
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static char *lastch(char *line)
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{
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int len = strlen(line);
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if (len == 0)
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return NULL;
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return &line[len-1];
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}
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/* strip any trailing CR, LF or combinations thereof */
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static void chomp(char *line)
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{
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char *ch;
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if (strlen(line) == 0)
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return;
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for (ch = lastch(line);
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ch != NULL && (*ch == '\n' || *ch == '\r');
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ch = lastch(line)) {
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*ch = '\0';
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}
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}
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static int modes_encode_from_ascii(ubit_t *out, const char *in, unsigned int length)
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{
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char ascbuf[LONG_LEN*2];
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ubit_t binbuf[LONG_LEN];
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int num_bytes;
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int rc;
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/* sanity checking */
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if (length > LONG_LEN*2 + 2) {
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fprintf(stderr, "String too long!\n");
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return -1;
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}
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memset(ascbuf, 0, sizeof(ascbuf));
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strncpy(ascbuf, in, length);
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/* remove any trailing line endings */
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chomp(ascbuf);
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if (ascbuf[0] != '*' || ascbuf[strlen(ascbuf)-1] != ';') {
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fprintf(stderr, "string `%s' not in correct format\n", in);
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return -2;
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}
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/* remove trailing semicolon */
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ascbuf[strlen(ascbuf)-1] = '\0';
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num_bytes = strlen(ascbuf) / 2;
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/* convert from hex to binary */
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rc = osmo_hexparse(ascbuf+1, binbuf, sizeof(binbuf));
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if (rc < 0) {
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fprintf(stderr, "error during hexparse of `%s'\n", ascbuf);
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return rc;
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}
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/* encode the actual binary */
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return modes_encode_from_bin(out, binbuf, num_bytes*8);
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}
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void
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AdsbEncoder_impl::handle_msg(pmt::pmt_t pdu)
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{
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pmt::pmt_t meta = pmt::car(pdu);
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pmt::pmt_t inpdu_bytes = pmt::cdr(pdu);
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if (pmt::is_null(meta)) {
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meta = pmt::make_dict();
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} else if (!pmt::is_dict(meta)) {
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throw std::runtime_error("received non PDU input");
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}
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/* FIXME */
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if (!pmt::is_u8vector(inpdu_bytes))
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throw std::runtime_error("This block requires u8 vector as input");
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size_t io(0);
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const char *sentence = (const char *) uniform_vector_elements(inpdu_bytes, io);
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ubit_t outbuf[OUTBUF_SIZE];
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int rc;
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rc = modes_encode_from_ascii(outbuf, sentence, pmt::length(inpdu_bytes));
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if (rc < 0)
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return;
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pmt::pmt_t outpdu_bytes = make_pdu_vector(blocks::pdu::byte_t, outbuf, rc);
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message_port_pub(pmt::mp("pdus"), pmt::cons(meta, outpdu_bytes));
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}
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} /* namespace adsbtx */
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} /* namespace gr */
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}
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@ -0,0 +1,49 @@
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/* -*- c++ -*- */
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/*
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* Copyright 2013 <+YOU OR YOUR COMPANY+>.
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* Copyright 2015 Harald Welte <hwelte@sysmocom.de>
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef INCLUDED_ADSBTX_BUILD_FRAME_IMPL_H
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#define INCLUDED_ADSBTX_BUILD_FRAME_IMPL_H
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#include <adsbtx/AdsbEncoder.h>
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#define __VERSION 0.3
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namespace gr {
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namespace adsbtx {
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class AdsbEncoder_impl : public AdsbEncoder
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{
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private:
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public:
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AdsbEncoder_impl(void);
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~AdsbEncoder_impl(void);
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// Where all the action really happens
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void handle_msg(pmt::pmt_t pdu);
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};
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} // namespace adsbtx
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} // namespace gr
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#endif /* INCLUDED_ADSBTX_BUILD_FRAME_IMPL_H */
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@ -26,6 +26,7 @@ include_directories(${Boost_INCLUDE_DIR})
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link_directories(${Boost_LIBRARY_DIRS})
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list(APPEND adsbtx_sources
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AdsbEncoder_impl.cc
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)
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set(adsbtx_sources "${adsbtx_sources}" PARENT_SCOPE)
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endif(NOT adsbtx_sources)
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add_library(gnuradio-adsbtx SHARED ${adsbtx_sources})
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target_link_libraries(gnuradio-adsbtx ${Boost_LIBRARIES} ${GNURADIO_ALL_LIBRARIES})
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target_link_libraries(gnuradio-adsbtx ${Boost_LIBRARIES}
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${GNURADIO_ALL_LIBRARIES}
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-lvolk -losmocore
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)
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set_target_properties(gnuradio-adsbtx PROPERTIES DEFINE_SYMBOL "gnuradio_adsbtx_EXPORTS")
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if(APPLE)
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${GNURADIO_RUNTIME_LIBRARIES}
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${Boost_LIBRARIES}
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${CPPUNIT_LIBRARIES}
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-losmocore
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gnuradio-adsbtx
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)
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%include "adsbtx_swig_doc.i"
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%{
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#include "adsbtx/AdsbEncoder.h"
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%}
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%include "adsbtx/AdsbEncoder.h"
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GR_SWIG_BLOCK_MAGIC2(adsbtx, AdsbEncoder);
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