diff options
Diffstat (limited to 'gr-pager/apps/usrp_flex_band.py')
| -rwxr-xr-x | gr-pager/apps/usrp_flex_band.py | 106 |
1 files changed, 70 insertions, 36 deletions
diff --git a/gr-pager/apps/usrp_flex_band.py b/gr-pager/apps/usrp_flex_band.py index 06c2488c0..8ea76c229 100755 --- a/gr-pager/apps/usrp_flex_band.py +++ b/gr-pager/apps/usrp_flex_band.py @@ -1,6 +1,6 @@ #!/usr/bin/env python # -# Copyright 2006,2007,2009 Free Software Foundation, Inc. +# Copyright 2006,2007,2009,2011 Free Software Foundation, Inc. # # This file is part of GNU Radio # @@ -20,32 +20,52 @@ # Boston, MA 02110-1301, USA. # -from gnuradio import gr, gru, usrp, optfir, eng_notation, blks2, pager +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") - self.subdev = None if options.from_file is not None: - self.src = gr.file_source(gr.sizeof_gr_complex, options.from_file) + self.u = gr.file_source(gr.sizeof_gr_complex, options.from_file) if options.verbose: print "Reading samples from file", options.from_file else: - self.src = usrp.source_c() - if options.rx_subdev_spec is 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)) - self.src.set_decim_rate(64) - frequency = options.frequency+options.calibration - result = usrp.tune(self.src, 0, self.subdev, frequency) - if options.verbose: - print "Using", self.subdev.name(), " for receiving." - print "Tuned USRP to", frequency + # Set up USRP source + self.u = uhd.usrp_source(device_addr=options.address, + io_type=uhd.io_type.COMPLEX_FLOAT32, + num_channels=1) + + # 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, @@ -56,43 +76,59 @@ class app_top_block(gr.top_block): print "Channel filter has", len(taps), "taps" bank = blks2.analysis_filterbank(40, taps) - self.connect(self.src, bank) + 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.src, src_sink) + self.connect(self.u, src_sink) for i in range(40): if i < 20: - freq = options.frequency+i*25e3 + freq = options.freq+i*25e3 else: - freq = options.frequency-0.5e6+(i-20)*25e3 + 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 main(): +def get_options(): parser = OptionParser(option_class=eng_option) - parser.add_option("-f", "--frequency", type="eng_float", default=929.5e6, - help="set receive center frequency to Hz", metavar="Hz") - parser.add_option("-R", "--rx-subdev-spec", type="subdev", - help="select USRP Rx side A or B (default=first daughterboard found)") - parser.add_option("-c", "--calibration", type="eng_float", default=0.0, + + 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("-g", "--gain", type="int", - help="set RF gain", metavar="dB") - parser.add_option("-F", "--from-file", default=None, - help="Read from file instead of USRP") + 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("-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 options.verbose: - print options + 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) @@ -105,6 +141,4 @@ def main(): runner.end() - -if __name__ == "__main__": - main() + |