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author | Tom Rondeau | 2012-04-03 17:52:55 -0400 |
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committer | Tom Rondeau | 2012-04-03 17:52:55 -0400 |
commit | 7c6361c85a00517b9781d4cd4f2c2e3bdda67035 (patch) | |
tree | 46787f5b358a4f92ac617d0dcabeccb72bcadee7 /gr-pager/apps/usrp_flex | |
parent | 0c1b35d17e9aa5058f58fd8763bb292613b3658a (diff) | |
parent | 7dc08ba2875c0dace0432cd514add6ce2b085f44 (diff) | |
download | gnuradio-7c6361c85a00517b9781d4cd4f2c2e3bdda67035.tar.gz gnuradio-7c6361c85a00517b9781d4cd4f2c2e3bdda67035.tar.bz2 gnuradio-7c6361c85a00517b9781d4cd4f2c2e3bdda67035.zip |
Merge branch 'rm_python_ext' into cmake_builds
Conflicts:
CMakeLists.txt
Diffstat (limited to 'gr-pager/apps/usrp_flex')
-rwxr-xr-x | gr-pager/apps/usrp_flex | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/gr-pager/apps/usrp_flex b/gr-pager/apps/usrp_flex new file mode 100755 index 000000000..7d0d66a95 --- /dev/null +++ b/gr-pager/apps/usrp_flex @@ -0,0 +1,161 @@ +#!/usr/bin/env python +# +# Copyright 2006,2007,2009,2011 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio 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. +# +# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from gnuradio import gr, gru, uhd, optfir, eng_notation, pager +from gnuradio.eng_option import eng_option +from optparse import OptionParser +import time, os, sys + +class app_top_block(gr.top_block): + def __init__(self, options, queue): + gr.top_block.__init__(self, "usrp_flex") + self.options = options + self.offset = 0.0 + self.adj_time = time.time() + self.verbose = options.verbose + + if options.from_file is None: + # Set up USRP source + self.u = uhd.usrp_source(device_addr=options.address, stream_args=uhd.stream_args('fc32')) + + # Grab 250 KHz of spectrum + # (A UHD facility to get sample rate range and granularity would be useful) + self.u.set_samp_rate(250e3) + rate = self.u.get_samp_rate() + if rate != 250e3: + print "Unable to set required sample rate of 250 Ksps (got %f)" % rate + sys.exit(1) + + # Tune daughterboard + r = self.u.set_center_freq(options.freq+options.calibration, 0) + if not r: + frange = self.u.get_freq_range() + sys.stderr.write(("\nRequested frequency (%f) out or range [%f, %f]\n") % \ + (freq, frange.start(), frange.stop())) + sys.exit(1) + + # if no gain was specified, use the mid-point in dB + if options.rx_gain is None: + grange = self.u.get_gain_range() + options.rx_gain = float(grange.start()+grange.stop())/2.0 + print "\nNo gain specified." + print "Setting gain to %f (from [%f, %f])" % \ + (options.rx_gain, grange.start(), grange.stop()) + + self.u.set_gain(options.rx_gain, 0) + + else: + # Use supplied file as source of samples + self.u = gr.file_source(gr.sizeof_gr_complex, options.from_file) + if options.verbose: + print "Reading samples from", options.from_file + + if options.log and not options.from_file: + usrp_sink = gr.file_sink(gr.sizeof_gr_complex, 'usrp.dat') + self.connect(self.u, usrp_sink) + + # Set up 22KHz-wide bandpass about center frequency. Decimate by 10 + # to get channel rate of 25Ksps + taps = optfir.low_pass(1.0, # Filter gain + 250e3, # Sample rate + 11000, # One-sided modulation bandwidth + 12500, # One-sided channel bandwidth + 0.1, # Passband ripple + 60) # Stopband attenuation + + if options.verbose: + print "Channel filter has", len(taps), "taps." + + self.chan = gr.freq_xlating_fir_filter_ccf(10, # Decimation rate + taps, # Filter taps + 0.0, # Offset frequency + 250e3) # Sample rate + + if options.log: + chan_sink = gr.file_sink(gr.sizeof_gr_complex, 'chan.dat') + self.connect(self.chan, chan_sink) + + # FLEX protocol demodulator + self.flex = pager.flex_demod(queue, options.freq, options.verbose, options.log) + + self.connect(self.u, self.chan, self.flex) + + def freq_offset(self): + return self.flex.dc_offset()*1600 + + def adjust_freq(self): + if time.time() - self.adj_time > 1.6: # Only do it once per FLEX frame + self.adj_time = time.time() + self.offset -= self.freq_offset() + self.chan.set_center_freq(self.offset) + if self.verbose: + print "Channel frequency offset (Hz):", int(self.offset) + + +def get_options(): + parser = OptionParser(option_class=eng_option) + + parser.add_option('-f', '--freq', type="eng_float", default=None, + help="Set receive frequency to FREQ [default=%default]", + metavar="FREQ") + parser.add_option("-a", "--address", type="string", default="addr=192.168.10.2", + help="Address of UHD device, [default=%default]") + parser.add_option("-A", "--antenna", type="string", default=None, + help="select Rx Antenna where appropriate") + parser.add_option("", "--rx-gain", type="eng_float", default=None, + help="set receive gain in dB (default is midpoint)") + parser.add_option("-c", "--calibration", type="eng_float", default=0.0, + help="set frequency offset to Hz", metavar="Hz") + parser.add_option("-v", "--verbose", action="store_true", default=False) + parser.add_option("-l", "--log", action="store_true", default=False, + help="log flowgraph to files (LOTS of data)") + parser.add_option("-F", "--from-file", default=None, + help="read samples from file instead of USRP") + + (options, args) = parser.parse_args() + + if len(args) > 0: + print "Run 'usrp_flex.py -h' for options." + sys.exit(1) + + if (options.freq is None): + sys.stderr.write("You must specify -f FREQ or --freq FREQ\n") + sys.exit(1) + + return (options, args) + +if __name__ == "__main__": + + (options, args) = get_options() + + # Flow graph emits pages into message queue + queue = gr.msg_queue() + tb = app_top_block(options, queue) + runner = pager.queue_runner(queue) + + try: + tb.run() + except KeyboardInterrupt: + pass + + runner.end() + |