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Diffstat (limited to 'gr-pager/src/usrp_flex.py')
| -rwxr-xr-x | gr-pager/src/usrp_flex.py | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/gr-pager/src/usrp_flex.py b/gr-pager/src/usrp_flex.py deleted file mode 100755 index f8d9d25b1..000000000 --- a/gr-pager/src/usrp_flex.py +++ /dev/null @@ -1,172 +0,0 @@ -#!/usr/bin/env python -# -# Copyright 2006,2007,2009 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, usrp, optfir, eng_notation, pager -from gnuradio.eng_option import eng_option -from optparse import OptionParser -import time, os, sys - -""" -This example application demonstrates receiving and demodulating the -FLEX pager protocol. - -The following are required command line parameters: - --f FREQ USRP receive frequency - -The following are optional command line parameters: - --R SUBDEV Daughter board specification, defaults to first found --F FILE Read samples from a file instead of USRP. --c FREQ Calibration offset. Gets added to receive frequency. - Defaults to 0.0 Hz. --g GAIN Daughterboard gain setting. Defaults to mid-range. --l Log flow graph to files (LOTS of data) --v Verbose output - -Once the program is running, ctrl-break (Ctrl-C) stops operation. -""" - -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 with specified RX daughterboard - self.src = usrp.source_c() - if options.rx_subdev_spec == None: - options.rx_subdev_spec = usrp.pick_rx_subdevice(self.src) - self.subdev = usrp.selected_subdev(self.src, options.rx_subdev_spec) - self.src.set_mux(usrp.determine_rx_mux_value(self.src, options.rx_subdev_spec)) - - # Grab 250 KHz of spectrum (sample rate becomes 250 ksps complex) - self.src.set_decim_rate(256) - - # If no gain specified, set to midrange - if options.gain is None: - g = self.subdev.gain_range() - options.gain = (g[0]+g[1])/2.0 - self.subdev.set_gain(options.gain) - - # Tune daughterboard - actual_frequency = options.frequency+options.calibration - tune_result = usrp.tune(self.src, 0, self.subdev, actual_frequency) - if not tune_result: - sys.stderr.write("Failed to set center frequency to "+`actual_frequency`+"\n") - sys.exit(1) - - if options.verbose: - print "Using RX daughterboard", self.subdev.side_and_name() - print "USRP gain is", options.gain - print "USRP tuned to", actual_frequency - - else: - # Use supplied file as source of samples - self.src = 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.src, 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.frequency, options.verbose, options.log) - - self.connect(self.src, 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 main(): - parser = OptionParser(option_class=eng_option) - parser.add_option("-f", "--frequency", type="eng_float", default=None, - help="set receive frequency to Hz", metavar="Hz") - parser.add_option("-R", "--rx-subdev-spec", type="subdev", - help="select USRP Rx side A or B", metavar="SUBDEV") - parser.add_option("-c", "--calibration", type="eng_float", default=0.0, - help="set frequency offset to Hz", metavar="Hz") - parser.add_option("-g", "--gain", type="int", default=None, - help="set RF gain", metavar="dB") - parser.add_option("-l", "--log", action="store_true", default=False, - help="log flowgraph to files (LOTS of data)") - parser.add_option("-v", "--verbose", action="store_true", default=False, - help="display debug output") - 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 or (options.frequency == None and options.from_file == None): - print "Run 'usrp_flex.py -h' for options." - sys.exit(1) - - if options.frequency == None: - options.frequency = 0.0 - - # 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() - - -if __name__ == "__main__": - main() |