diff options
Diffstat (limited to 'apps/helpers/grgsm_capture')
-rwxr-xr-x | apps/helpers/grgsm_capture | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/apps/helpers/grgsm_capture b/apps/helpers/grgsm_capture new file mode 100755 index 0000000..add42d3 --- /dev/null +++ b/apps/helpers/grgsm_capture @@ -0,0 +1,274 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# @file +# @author (C) 2015 by Roman Khassraf <rkhassraf@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. +# +# + +from gnuradio import blocks +from gnuradio import eng_notation +from gnuradio import gr +from gnuradio.eng_option import eng_option +from gnuradio.filter import firdes +from math import pi +from optparse import OptionParser + +import grgsm +import osmosdr +import pmt +import signal +import sys + + +class grgsm_capture(gr.top_block): + + def __init__(self, fc, gain, samp_rate, ppm, arfcn, cfile=None, burst_file=None, band=None, verbose=False, rec_length=None, args=""): + + gr.top_block.__init__(self, "Gr-gsm Capture") + + ################################################## + # Parameters + ################################################## + self.fc = fc + self.gain = gain + self.samp_rate = samp_rate + self.ppm = ppm + self.arfcn = arfcn + self.cfile = cfile + self.burst_file = burst_file + self.band = band + self.verbose = verbose + self.shiftoff = shiftoff = 400e3 + self.rec_length = rec_length + + ################################################## + # Processing Blocks + ################################################## + + self.rtlsdr_source = osmosdr.source( args="numchan=" + str(1) + " " + args ) + self.rtlsdr_source.set_sample_rate(samp_rate) + self.rtlsdr_source.set_center_freq(fc - shiftoff, 0) + self.rtlsdr_source.set_freq_corr(ppm, 0) + self.rtlsdr_source.set_dc_offset_mode(2, 0) + self.rtlsdr_source.set_iq_balance_mode(2, 0) + self.rtlsdr_source.set_gain_mode(True, 0) + self.rtlsdr_source.set_gain(gain, 0) + self.rtlsdr_source.set_if_gain(20, 0) + self.rtlsdr_source.set_bb_gain(20, 0) + self.rtlsdr_source.set_antenna("", 0) + self.rtlsdr_source.set_bandwidth(250e3+abs(shiftoff), 0) + self.blocks_rotator = blocks.rotator_cc(-2*pi*shiftoff/samp_rate) + + if self.rec_length is not None: + self.blocks_head_0 = blocks.head(gr.sizeof_gr_complex, int(samp_rate*rec_length)) + + if self.verbose or self.burst_file: + self.gsm_receiver = grgsm.receiver(4, ([self.arfcn]), ([])) + self.gsm_input = grgsm.gsm_input( + ppm=0, + osr=4, + fc=fc, + samp_rate_in=samp_rate, + ) + self.gsm_clock_offset_control = grgsm.clock_offset_control(fc-shiftoff, samp_rate, osr=4) + + if self.burst_file: + self.gsm_burst_file_sink = grgsm.burst_file_sink(self.burst_file) + + if self.cfile: + self.blocks_file_sink = blocks.file_sink(gr.sizeof_gr_complex*1, self.cfile, False) + self.blocks_file_sink.set_unbuffered(False) + + if self.verbose: + self.gsm_bursts_printer_0 = grgsm.bursts_printer(pmt.intern(""), + False, False, False, False) + + ################################################## + # Connections + ################################################## + + if self.rec_length is not None: #if recording length is defined connect head block after the source + self.connect((self.rtlsdr_source, 0), (self.blocks_head_0, 0)) + self.connect((self.blocks_head_0, 0), (self.blocks_rotator, 0)) + else: + self.connect((self.rtlsdr_source, 0), (self.blocks_rotator, 0)) + + if self.cfile: + self.connect((self.blocks_rotator, 0), (self.blocks_file_sink, 0)) + + if self.verbose or self.burst_file: + self.connect((self.gsm_input, 0), (self.gsm_receiver, 0)) + self.connect((self.blocks_rotator, 0), (self.gsm_input, 0)) + self.msg_connect(self.gsm_clock_offset_control, "ctrl", self.gsm_input, "ctrl_in") + self.msg_connect(self.gsm_receiver, "measurements", self.gsm_clock_offset_control, "measurements") + + if self.burst_file: + self.msg_connect(self.gsm_receiver, "C0", self.gsm_burst_file_sink, "in") + if self.verbose: + self.msg_connect(self.gsm_receiver, "C0", self.gsm_bursts_printer_0, "bursts") + + def get_fc(self): + return self.fc + + def set_fc(self, fc): + self.fc = fc + if self.verbose or self.burst_file: + self.gsm_input.set_fc(self.fc) + + def get_arfcn(self): + return self.arfcn + + def set_arfcn(self, arfcn): + self.arfcn = arfcn + if self.verbose or self.burst_file: + self.gsm_receiver.set_cell_allocation([self.arfcn]) + if options.band: + new_freq = grgsm.arfcn.arfcn2downlink(self.arfcn, self.band) + else: + for band in grgsm.arfcn.get_bands(): + if grgsm.arfcn.is_valid_arfcn(arfcn, band): + new_freq = grgsm.arfcn.arfcn2downlink(arfcn, band) + break + self.set_fc(new_freq) + + def get_gain(self): + return self.gain + + def set_gain(self, gain): + self.gain = gain + + def get_samp_rate(self): + return self.samp_rate + + def set_samp_rate(self, samp_rate): + self.samp_rate = samp_rate + self.rtlsdr_source.set_sample_rate(self.samp_rate) + if self.verbose or self.burst_file: + self.gsm_input.set_samp_rate_in(self.samp_rate) + + def get_ppm(self): + return self.ppm + + def set_ppm(self, ppm): + self.ppm = ppm + self.set_ppm_slider(self.ppm) + + def get_rec_length(self): + return self.rec_length + + def set_rec_length(self, rec_length): + self.rec_length = rec_length + self.blocks_head_0.set_length(int(self.samp_rate*self.rec_length)) + + +if __name__ == '__main__': + + parser = OptionParser(option_class=eng_option, usage="%prog [options]", + description="RTL-SDR capturing app of gr-gsm.") + + parser.add_option("-f", "--fc", dest="fc", type="eng_float", + help="Set frequency [default=%default]") + + parser.add_option("-a", "--arfcn", dest="arfcn", type="intx", + help="Set ARFCN instead of frequency. In some cases you may have to provide the GSM band also") + + parser.add_option("-g", "--gain", dest="gain", type="eng_float", + default=eng_notation.num_to_str(30), + help="Set gain [default=%default]") + + parser.add_option("-s", "--samp-rate", dest="samp_rate", type="eng_float", + default=eng_notation.num_to_str(1000000), + help="Set samp_rate [default=%default]") + + parser.add_option("-p", "--ppm", dest="ppm", type="intx", default=0, + help="Set ppm [default=%default]") + + parser.add_option("-b", "--burst-file", dest="burst_file", + help="File where the captured bursts are saved") + + parser.add_option("-c", "--cfile", dest="cfile", + help="File where the captured data are saved") + + bands_list = ", ".join(grgsm.arfcn.get_bands()) + parser.add_option("--band", dest="band", + help="Specify the GSM band for the frequency.\nAvailable bands are: " + bands_list + ".\nIf no band is specified, it will be determined automatically, defaulting to 0." ) + + parser.add_option("", "--args", dest="args", type="string", default="", + help="Set device arguments [default=%default]") + + parser.add_option("-v", "--verbose", action="store_true", + help="If set, the captured bursts are printed to stdout") + + parser.add_option("-T", "--rec-length", dest="rec_length", type="eng_float", + help="Set length of recording in seconds [default=%default]") + + (options, args) = parser.parse_args() + + if options.cfile is None and options.burst_file is None: + parser.error("Please provide a cfile or a burst file (or both) to save the captured data\n") + + if (options.fc is None and options.arfcn is None) or (options.fc is not None and options.arfcn is not None): + parser.error("You have to provide either a frequency or an ARFCN (but not both).\n") + + arfcn = 0 + fc = 939.4e6 + if options.arfcn: + if options.band: + if options.band not in grgsm.arfcn.get_bands(): + parser.error("Invalid GSM band\n") + elif not grgsm.arfcn.is_valid_arfcn(options.arfcn, options.band): + parser.error("ARFCN is not valid in the specified band\n") + else: + arfcn = options.arfcn + fc = grgsm.arfcn.arfcn2downlink(arfcn, options.band) + else: + arfcn = options.arfcn + for band in grgsm.arfcn.get_bands(): + if grgsm.arfcn.is_valid_arfcn(arfcn, band): + fc = grgsm.arfcn.arfcn2downlink(arfcn, band) + break + elif options.fc: + fc = options.fc + if options.band: + if options.band not in grgsm.arfcn.get_bands(): + parser.error("Invalid GSM band\n") + elif not grgsm.arfcn.is_valid_downlink(options.fc, options.band): + parser.error("Frequency is not valid in the specified band\n") + else: + arfcn = grgsm.arfcn.downlink2arfcn(options.fc, options.band) + else: + for band in grgsm.arfcn.get_bands(): + if grgsm.arfcn.is_valid_downlink(options.fc, band): + arfcn = grgsm.arfcn.downlink2arfcn(options.fc, band) + break + + tb = grgsm_capture(fc=fc, gain=options.gain, samp_rate=options.samp_rate, + ppm=options.ppm, arfcn=arfcn, cfile=options.cfile, + burst_file=options.burst_file, band=options.band, verbose=options.verbose, + rec_length=options.rec_length, args=options.args) + + def signal_handler(signal, frame): + tb.stop() + tb.wait() + sys.exit(0) + + signal.signal(signal.SIGINT, signal_handler) + + tb.start() + tb.wait() |