diff options
Diffstat (limited to 'gr-pager/apps/usrp_flex_band')
| -rwxr-xr-x | gr-pager/apps/usrp_flex_band | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/gr-pager/apps/usrp_flex_band b/gr-pager/apps/usrp_flex_band new file mode 100755 index 000000000..63fb93fa1 --- /dev/null +++ b/gr-pager/apps/usrp_flex_band @@ -0,0 +1,142 @@ +#!/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, blks2, pager +from gnuradio.eng_option import eng_option +from optparse import OptionParser +import sys + +class app_top_block(gr.top_block): + def __init__(self, options, queue): + gr.top_block.__init__(self, "usrp_flex_all") + + if options.from_file is not None: + self.u = gr.file_source(gr.sizeof_gr_complex, options.from_file) + if options.verbose: + print "Reading samples from file", options.from_file + else: + # Set up USRP source + self.u = uhd.usrp_source(device_addr=options.address, stream_args=uhd.stream_args('fc32')) + + # Grab 1 MHz of spectrum + # (A UHD facility to get sample rate range and granularity would be useful) + self.u.set_samp_rate(1e6) + rate = self.u.get_samp_rate() + if rate != 1e6: + print "Unable to set required sample rate of 1 Msps (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) + + + taps = gr.firdes.low_pass(1.0, + 1.0, + 1.0/40.0*0.4, + 1.0/40.0*0.1, + gr.firdes.WIN_HANN) + + if options.verbose: + print "Channel filter has", len(taps), "taps" + + bank = blks2.analysis_filterbank(40, taps) + self.connect(self.u, bank) + + if options.log and options.from_file == None: + src_sink = gr.file_sink(gr.sizeof_gr_complex, 'usrp.dat') + self.connect(self.u, src_sink) + + for i in range(40): + if i < 20: + freq = options.freq+i*25e3 + else: + freq = options.freq-0.5e6+(i-20)*25e3 + + self.connect((bank, i), pager.flex_demod(queue, freq, options.verbose, options.log)) + if options.log: + self.connect((bank, i), gr.file_sink(gr.sizeof_gr_complex, 'chan_'+'%3.3f'%(freq/1e6)+'.dat')) + + +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_band.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() + + queue = gr.msg_queue() + tb = app_top_block(options, queue) + runner = pager.queue_runner(queue) + + try: + tb.run() + except KeyboardInterrupt: + pass + + runner.end() + + |