diff options
Diffstat (limited to 'gsm-tvoid/src/python')
| -rwxr-xr-x | gsm-tvoid/src/python/gsm_scan_light.py | 658 |
1 files changed, 658 insertions, 0 deletions
diff --git a/gsm-tvoid/src/python/gsm_scan_light.py b/gsm-tvoid/src/python/gsm_scan_light.py new file mode 100755 index 0000000..308602f --- /dev/null +++ b/gsm-tvoid/src/python/gsm_scan_light.py @@ -0,0 +1,658 @@ +#!/usr/bin/env python +# TODO: +# * Add status info to window (frequency, offset, etc) +# * Put direct frequency tuning back +# * Add rate-limited file reads (throttle?) +# * Make console only version +# * Reset burst_stats on retune +# * Add better option checking +# * Wideband (multi-channel) processing (usrp and/or file input) +# * Automatic beacon scan (quick scan RSSI, then check for BCCH) +# * AGC +#Piotr: +# I've removed stuff for visualisation which isn't needed to get +# output bits and which causes that the program hangs when it finish processing. +# This version works with GNU Radio 3.2.x + +import sys + +#nasty hack for testing +for extdir in ['../lib','../lib/.libs']: + if extdir not in sys.path: + sys.path.append(extdir) + +from gnuradio import gr, gru, blks2 +from gnuradio import usrp +from gnuradio import eng_notation +from gnuradio.eng_option import eng_option +from gnuradio.wxgui import stdgui2, fftsink2, waterfallsink2, scopesink2, form, slider +from optparse import OptionParser +from math import pi +import wx +import gsm + +#################### +class burst_callback(gr.feval_ll): + def __init__(self, fg): + gr.feval_ll.__init__(self) + self.fg = fg + self.offset_mean_num = 10 #number of FCCH offsets to average + self.offset_vals = [] + +#################### + def eval(self, x): + #print "burst_callback: eval(",x,")\n"; + try: + if gsm.BURST_CB_SYNC_OFFSET == x: + #print "burst_callback: SYNC_OFFSET\n"; + if self.fg.options.tuning.count("o"): + last_offset = self.fg.burst.last_freq_offset() + self.fg.offset -= last_offset + #print "burst_callback: SYNC_OFFSET:", last_offset, " ARFCN: ", self.fg.channel, "\n"; + self.fg.set_channel(self.fg.channel) + + elif gsm.BURST_CB_ADJ_OFFSET == x: + last_offset = self.fg.burst.last_freq_offset() + + self.offset_vals.append(last_offset) + count = len(self.offset_vals) + #print "burst_callback: ADJ_OFFSET:", last_offset, ", count=",count,"\n"; + + if count >= self.offset_mean_num: + sum = 0.0 + while len(self.offset_vals): + sum += self.offset_vals.pop(0) + + self.fg.mean_offset = sum / self.offset_mean_num + + #print "burst_callback: mean offset:", self.fg.mean_offset, "\n"; + + #retune if greater than 100 Hz + if abs(self.fg.mean_offset) > 100.0: + #print "burst_callback: mean offset adjust:", self.fg.mean_offset, "\n"; + if self.fg.options.tuning.count("o"): + #print "burst_callback: tuning.\n"; + self.fg.offset -= self.fg.mean_offset + self.fg.set_channel(self.fg.channel) + + elif gsm.BURST_CB_TUNE == x: + #print "burst_callback: BURST_CB_TUNE: ARFCN: ", self.fg.burst.next_arfcn, "\n"; + if self.fg.options.tuning.count("h"): + #print "burst_callback: tuning.\n"; + self.fg.set_channel(self.fg.burst.next_arfcn) + + return 0 + + except Exception, e: + print >> sys.stderr, "burst_callback: Exception: ", e + + +#################### +def pick_subdevice(u): + if u.db[0][0].dbid() >= 0: + return (0, 0) + if u.db[1][0].dbid() >= 0: + return (1, 0) + return (0, 0) + +#################### +def get_freq_from_arfcn(chan,region): + + #P/E/R-GSM 900 + if chan >= 0 and chan <= 124: + freq = 890 + 0.2*chan + 45 + + #GSM 850 + elif chan >= 128 and chan <= 251: + freq = 824.2 + 0.2*(chan - 128) + 45 + + #GSM 450 + elif chan >= 259 and chan <= 293: + freq = 450.6 + 0.2*(chan - 259) + 10 + + #GSM 480 + elif chan >= 306 and chan <= 340: + freq = 479 + 0.2*(chan - 306) + 10 + + #DCS 1800 + elif region is "e" and chan >= 512 and chan <= 885: + freq = 1710.2 + 0.2*(chan - 512) + 95 + + #DCS 1900 + elif region is "u" and chan >= 512 and chan <= 810: + freq = 1850.2 + 0.2*(chan - 512) + 80 + + #E/R-GSM 900 + elif chan >= 955 and chan <= 1023: + freq = 890 + 0.2*(chan - 1024) + 45 + + else: + freq = 0 + + return freq * 1e6 + +def get_arfcn_from_freq(freq,region): + freq = freq / 1e6 + # GSM 450 + if freq <= 450.6 + 0.2*(293 - 259) + 10: + arfcn = ((freq - (450.6 + 10)) / 0.2) + 259 + # GSM 480 + elif freq <= 479 + 0.2*(340 - 306) + 10: + arfcn = ((freq - (479 + 10)) / 0.2) + 306 + # GSM 850 + elif freq <= 824.2 + 0.2*(251 - 128) + 45: + arfcn = ((freq - (824.2 + 45)) / 0.2) + 128 + #E/R-GSM 900 + elif freq <= 890 + 0.2*(1023 - 1024) + 45: + arfcn = ((freq - (890 + 45)) / -0.2) + 955 + # GSM 900 + elif freq <= 890 + 0.2*124 + 45: + arfcn = (freq - (890 + 45)) / 0.2 + else: + if region is "u": + if freq > 1850.2 + 0.2*(810 - 512) + 80: + arfcn = 0; + else: + arfcn = (freq - (1850.2 + 80) / 0.2) + 512 + elif region is "e": + if freq > 1710.2 + 0.2*(885 - 512) + 95: + arfcn = 0; + else: + arfcn = (freq - (1710.2 + 95) / 0.2) + 512 + else: + arfcn = 0 + + return arfcn + +#################### +class tvoid_receiver(gr.top_block): + + def __init__(self): + gr.top_block.__init__(self) + + #self.frame = frame + #self.panel = panel + self.parse_options() + self.setup_flowgraph() + self.setup_print_options() + #self._build_gui(vbox) + + #some non-gui wxwindows handlers + #self.t1 = wx.Timer(self.frame) + #self.t1.Start(5000,0) + #self.frame.Bind(wx.EVT_TIMER, self.on_tick) + + #bind the idle routing for message_queue processing + #self.frame.Bind(wx.EVT_IDLE, self.on_idle) + + #tune + self.set_channel(self.channel) + + #giddyup +# self.status_msg = "Started." + + +#################### + def parse_options(self): + parser = OptionParser(option_class=eng_option) + + #view options + parser.add_option("-S", "--scopes", type="string", default="I", + help="Select scopes to display. (N)one, (I)nput,(F)ilter,(d)emod,(c)locked,(b)urst [default=%default]") + parser.add_option("-p", "--print-console", type="string", default="s", + help="What to print on console. [default=%default]\n" + + "(n)othing, (e)verything, (s)tatus, (a)ll Types, (k)nown, (u)nknown, \n" + + "TS(0), (F)CCH, (S)CH, (N)ormal, (D)ummy\n" + + "Usefull (b)its, All TS (B)its, (C)orrelation bits, he(x) raw burst data, \n" + + "(d)ecoded hex for gsmdecode") + + + #decoder options + parser.add_option("-D", "--decoder", type="string", default="c", + help="Select decoder block to use. (c)omplex,(f)loat [default=%default]") + parser.add_option("-E", "--equalizer", type="string", default="none", + help="Type of equalizer to use. none, fixed-dfe, fixed-linear [default=%default]") + parser.add_option("-t", "--timing", type="string", default="cn", + help="Type of timing techniques to use. [default=%default] \n" + + "(n)one, (c)orrelation track, (q)uarter bit, (f)ull04 ") + + #tuning options + parser.add_option("-T", "--tuning", type="string", default="oh", + help="Type of tuning to perform. [default=%default] \n" + + "(n)one, (o)ffset adjustment, (h)opping ") + parser.add_option("-o", "--offset", type="eng_float", default=0.0, + help="Tuning offset frequency") + + #file options + parser.add_option("-I", "--inputfile", type="string", default=None, + help="Select a capture file to read") + parser.add_option("-O", "--outputfile", type="string", default=None, + help="Filename to save burst output") + parser.add_option("-l", "--fileloop", action="store_true", dest="fileloop", default=False, + help="Continuously loop data from input file") + + #usrp options + parser.add_option("-d", "--decim", type="int", default=112, + help="Set USRP decimation rate to DECIM [default=%default]") + parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None, + help="Select USRP Rx side A or B (default=first one with a daughterboard)") + parser.add_option("--fusb-block-size", type="int", default=0, + help="Set USRP blocksize") + parser.add_option("--fusb-nblocks", type="int", default=0, + help="Set USRP block buffers") + parser.add_option("--realtime",action="store_true", dest="realtime", + help="Use realtime scheduling.") + parser.add_option("-C", "--clock-offset", type="eng_float", default=0.0, + help="Sample clock offset frequency") + + #FIXME: gain not working? + parser.add_option("-g", "--gain", type="eng_float", default=None, + help="Set gain in dB (default is midpoint)") + parser.add_option("-c", "--channel", type="int", default=1, + help="Tune to GSM ARFCN.") + parser.add_option("-r", "--region", type="string", default="u", + help="Frequency bands to use for channels. (u)s or (e)urope [default=%default]") + + #testing options + parser.add_option("--test-hop-speed",action="store_true", dest="test_hop_speed", + help="Test hopping speed.") + parser.add_option("--hopgood", type="int", default=658, + help="Good ARFCN [default=%default]") + parser.add_option("--hopbad", type="int", default=655, + help="Emtpy ARFCN [default=%default]") + + (options, args) = parser.parse_args() + if (len(args) != 0): + parser.print_help() + sys.exit(1) + +# if (options.inputfile and ( options.freq or options.rx_subdev_spec or options.gain)): +# print "datafile option cannot be used with USRP options." +# sys.exit(1) + + if options.test_hop_speed: + options.tuning = 'h' #hopping only, no offset + options.channel = options.hopgood + + self.options = options + self.scopes = options.scopes + self.region = options.region + self.channel = options.channel + self.offset = options.offset + +#################### + def setup_print_options(self): + options = self.options + + self.print_status = options.print_console.count('s') + + if options.print_console.count('e'): + self.print_status = 1 + + #console print options + popts = 0 + + if options.print_console.count('d'): + popts |= gsm.PRINT_GSM_DECODE + + if options.print_console.count('s'): + popts |= gsm.PRINT_STATE + + if options.print_console.count('e'): + popts |= gsm.PRINT_EVERYTHING + + if options.print_console.count('a'): + popts |= gsm.PRINT_ALL_TYPES + + if options.print_console.count('k'): + popts |= gsm.PRINT_KNOWN + + if options.print_console.count('u'): + popts |= gsm.PRINT_UNKNOWN + + if options.print_console.count('0'): + popts |= gsm.PRINT_TS0 + + if options.print_console.count('F'): + popts |= gsm.PRINT_FCCH + + if options.print_console.count('S'): + popts |= gsm.PRINT_SCH + + if options.print_console.count('N'): + popts |= gsm.PRINT_NORMAL + + if options.print_console.count('D'): + popts |= gsm.PRINT_DUMMY + + if options.print_console.count('x'): + popts |= gsm.PRINT_BITS | gsm.PRINT_HEX + + if options.print_console.count('B'): + popts |= gsm.PRINT_BITS | gsm.PRINT_ALL_BITS + + elif options.print_console.count('b'): + popts |= gsm.PRINT_BITS + + elif options.print_console.count('C'): + popts |= gsm.PRINT_BITS | gsm.PRINT_CORR_BITS + + #print "Print flags: 0x%8.8x\n" %(popts) + + self.burst.d_print_options = popts + + +#################### + def setup_usrp(self): + options = self.options + + #set resonable defaults if no user prefs set + if options.realtime: + if options.fusb_block_size == 0: + options.fusb_block_size = gr.prefs().get_long('fusb', 'rt_block_size', 1024) + if options.fusb_nblocks == 0: + options.fusb_nblocks = gr.prefs().get_long('fusb', 'rt_nblocks', 16) + else: + if options.fusb_block_size == 0: + options.fusb_block_size = gr.prefs().get_long('fusb', 'block_size', 4096) + if options.fusb_nblocks == 0: + options.fusb_nblocks = gr.prefs().get_long('fusb', 'nblocks', 16) + + print >> sys.stderr, "fusb_block_size =", options.fusb_block_size + print >> sys.stderr, "fusb_nblocks =", options.fusb_nblocks + + + self.ursp = usrp.source_c(decim_rate=options.decim,fusb_block_size=options.fusb_block_size,fusb_nblocks=options.fusb_nblocks) + + if options.rx_subdev_spec is None: + options.rx_subdev_spec = pick_subdevice(self.ursp) + + self.ursp.set_mux(usrp.determine_rx_mux_value(self.ursp, options.rx_subdev_spec)) + + # determine the daughterboard subdevice + self.subdev = usrp.selected_subdev(self.ursp, options.rx_subdev_spec) + input_rate = self.ursp.adc_freq() / self.ursp.decim_rate() + + # set initial values + if options.gain is None: + # if no gain was specified, use the mid-point in dB + g = self.subdev.gain_range() + options.gain = float(g[0]+g[1])/2 + + self.set_gain(options.gain) + + self.source = self.ursp + +#################### + def setup_timing(self): + options = self.options + clock_rate = 64e6 + + if options.clock_offset: + clock_rate = 64e6 + options.clock_offset + elif options.channel: + #calculate actual clock rate based on frequency offset (assumes shared clock for sampling and tuning) + f = get_freq_from_arfcn(options.channel,options.region) + if f: + percent_offset = options.offset / get_freq_from_arfcn(options.channel,options.region) + else: + percent_offset = 0.0 + + clock_rate += clock_rate * percent_offset + print >> sys.stderr, "% offset = ", percent_offset, "clock = ", clock_rate + + self.clock_rate = clock_rate + self.input_rate = clock_rate / options.decim #TODO: what about usrp value? + self.gsm_symb_rate = 1625000.0 / 6.0 + self.sps = self.input_rate / self.gsm_symb_rate + +#################### + def setup_filter(self): + #test w/o filter (for buffer latency) + #self.filter = self.source + #return + + options = self.options + + # configure channel filter + filter_cutoff = 145e3 #135,417Hz is GSM bandwidth + filter_t_width = 10e3 + + #Only DSP adjust for offset on datafile, adjust tuner for USRP + #TODO: see if we can change this offset at runtime based on freq detection + if options.inputfile: + offset = self.offset + else: + offset = 0.0 + + filter_taps = gr.firdes.low_pass(1.0, self.input_rate, filter_cutoff, filter_t_width, gr.firdes.WIN_HAMMING) + self.filter = gr.freq_xlating_fir_filter_ccf(1, filter_taps, offset, self.input_rate) + + self.connect(self.source, self.filter) + +#################### + def setup_f_flowgraph(self): + # configure demodulator + # adjust the phase gain for sampling rate + self.demod = gr.quadrature_demod_cf(self.sps); + + #configure clock recovery + gain_mu = 0.01 + gain_omega = .25 * gain_mu * gain_mu # critically damped + self.clocker = gr.clock_recovery_mm_ff( self.sps, + gain_omega, + 0.5, #mu + gain_mu, + 0.5) #omega_relative_limit, + + self.burst = gsm.burst_ff(self.burst_cb) + self.connect(self.filter, self.demod, self.clocker, self.burst) + +#################### + def setup_c_flowgraph(self): + #use the sink version if burst scope not selected +# if self.scopes.count("b"): +# self.burst = gsm.burst_cf(self.burst_cb,self.input_rate) +# else: +# self.burst = gsm.burst_sink_c(self.burst_cb,self.input_rate) + + self.burst = gsm.burst_cf(self.burst_cb,self.input_rate) + + self.connect(self.filter, self.burst) + +#################### + +#################### + def configure_burst_decoder(self): + options = self.options + + # equalizer + eq_types = {'none': gsm.EQ_NONE, 'fixed-dfe': gsm.EQ_FIXED_DFE, 'fixed-linear': gsm.EQ_FIXED_LINEAR } + self.burst.d_equalizer_type = eq_types[options.equalizer] + + # timing + topts = 0 + + if options.timing.count('c'): + topts |= gsm.CLK_CORR_TRACK + + if options.timing.count('q'): + topts |= gsm.QB_QUARTER + + elif options.timing.count('f'): + topts |= gsm.QB_FULL04 + + self.burst.d_clock_options = topts + + #test modes + testopts = 0 + + if options.test_hop_speed: + testopts |= gsm.OPT_TEST_HOP_SPEED + self.burst.d_hop_good_arfcn = options.hopgood + self.burst.d_hop_bad_arfcn = options.hopbad + + print "!!!!! Enabling Hop Speed Testing (good=%d, bad=%d) !!!!!" % (options.hopgood,options.hopbad) + + self.burst.d_test_options = testopts + #print "Test Options: 0x%8.8x" % (self.burst.d_test_options) + + + +#################### + def setup_flowgraph(self): + + options = self.options + + # Attempt to enable realtime scheduling + if options.realtime: + r = gr.enable_realtime_scheduling() + if r == gr.RT_OK: + options.realtime = True + print >> sys.stderr, "Realtime scheduling ENABLED" + else: + options.realtime = False + print >> sys.stderr, "Realtime scheduling FAILED" + + self.setup_timing() + + # Setup our input source + if options.inputfile: + self.using_usrp = False + print >> sys.stderr, "Reading data from: " + options.inputfile + self.source = gr.file_source(gr.sizeof_gr_complex, options.inputfile, options.fileloop) + else: + self.using_usrp = True + self.setup_usrp() + + self.setup_filter() + + #create a tuner callback + self.mean_offset = 0.0 #this is set by tuner callback + self.burst_cb = burst_callback(self) + + # Setup flow based on decoder selection + # if options.decoder.count("c"): + self.setup_c_flowgraph() + # elif options.decoder.count("f"): + # self.setup_f_flowgraph() + + self.configure_burst_decoder() + + #Hookup a vector-stream converter if we want burst output + if self.scopes.count("b") or options.outputfile: + self.v2s = gr.vector_to_stream(gr.sizeof_float,142) #burst output is 142 (USEFUL_BITS) + self.connect(self.burst, self.v2s) + else: + self.burst_sink = gr.null_sink(gr.sizeof_float) + self.v2s = gr.vector_to_stream(gr.sizeof_float,142) #burst output is 142 (USEFUL_BITS) + self.connect(self.burst, self.v2s) + self.connect(self.v2s, self.burst_sink) + + + #Output file + if options.outputfile: + self.filesink = gr.file_sink(gr.sizeof_float, options.outputfile) + self.connect(self.v2s, self.filesink) + +# self.setup_scopes() + +#################### +# def set_status_msg(self, msg): +# self.frame.GetStatusBar().SetStatusText(msg, 0) + +#################### +#################### + def set_freq(self, freq): + #TODO: for wideband processing, determine if the desired freq is within our current sample range. + # If so, use the frequency translator to tune. Tune the USRP otherwise. + # Maybe have a flag to force tuning the USRP? + + if not self.using_usrp: + #if reading from file just adjust for offset in the freq translator + if self.print_status: + print >> sys.stderr, "Setting filter center freq to offset: ", self.offset, "\n" + + self.filter.set_center_freq(self.offset) + return True + + freq = freq - self.offset + + r = self.ursp.tune(0, self.subdev, freq) + + if r: + self.status_msg = '%f' % (freq/1e6) + return True + else: + self.status_msg = "Failed to set frequency (%f)" % (freq/1e6) + return False + +#################### + def set_gain(self, gain): + + if not self.using_usrp: + return False + + self.subdev.set_gain(gain) + +#################### + def set_channel(self, chan): + + self.chan = chan + + freq = get_freq_from_arfcn(chan,self.region) + + if freq: + self.set_freq(freq) + else: + self.status_msg = "Invalid Channel" + +#################### + def print_stats(self): + out = sys.stderr + + n_total = self.burst.d_total_count + n_unknown = self.burst.d_unknown_count + n_known = n_total - n_unknown + + print >> out, "======== STATS =========" + print >> out, 'freq_offset: ',self.offset + print >> out, 'mean_offset: ',self.mean_offset + print >> out, 'sync_loss_count:',self.burst.d_sync_loss_count + print >> out, 'total_bursts: ',n_total + print >> out, 'fcch_count: ',self.burst.d_fcch_count + print >> out, 'part_sch_count: ',self.burst.d_part_sch_count + print >> out, 'sch_count: ',self.burst.d_sch_count + print >> out, 'normal_count: ',self.burst.d_normal_count + print >> out, 'dummy_count: ',self.burst.d_dummy_count + print >> out, 'unknown_count: ',self.burst.d_unknown_count + print >> out, 'known_count: ',n_known + if n_total: + print >> out, '%known: ', 100.0 * n_known / n_total + + #timing + if self.options.decoder.count("c"): + omega = self.burst.get_omega() + else: + omega = self.clocker.omega() + + percent_sps = omega / self.sps + print >> out, 'omega: %f (%f / %f)' % (omega,self.sps,percent_sps) + + print >> out, "" + + +#################### +def main(): + try: + tvoid_receiver().run() + except KeyboardInterrupt: + pass + + +# app = gsm_receiver_first_blood().run()stdgui2.stdapp(app_flow_graph, "GSM Scanner", nstatus=1) +# app.MainLoop() + +#################### +if __name__ == '__main__': + main() |