/usr/bin/usrp_flex_all is in gnuradio 3.7.11-10.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 | #!/usr/bin/python
#
# Copyright 2006,2007,2009,2013 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, uhd, eng_notation, pager
from gnuradio import blocks
from gnuradio import filter
from gnuradio.eng_option import eng_option
from optparse import OptionParser
from string import split, join, printable
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 = blocks.file_source(gr.sizeof_gr_complex, options.from_file)
self.nchan = options.nchan
if options.verbose:
print "Reading samples from file", options.from_file
print "User specified file contains", options.nchan, "25 KHz channels."
else:
# Set up USRP source
self.u = uhd.usrp_source(device_addr=options.address, stream_args=uhd.stream_args('fc32'))
# 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 options.verbose:
print "Tuned to center frequency", (options.freq+options.calibration)/1e6, "MHz"
# 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)
# Grab >=3 MHz of spectrum, evenly divisible by 25 KHz channels
# (A UHD facility to get sample rate range and granularity would be useful)
self.u.set_samp_rate(3.125e6) # Works if USRP is 100 Msps and can decimate by 32
rate = self.u.get_samp_rate()
if rate != 3.125e6:
self.u.set_samp_rate(3.2e6) # Works if USRP is 64 Msps and can decimate by 20
rate = self.u.get_samp_rate()
if (rate != 3.2e6):
print "Unable to set required sample rate for >= 3MHz of 25 KHz channels."
sys.exit(1)
self.nchan = int(rate/25e3)
if options.verbose:
print "\nReceiving", rate/1e6, "MHz of bandwidth containing", self.nchan, "baseband channels."
taps = filter.firdes.low_pass(1.0,
1.0,
1.0/self.nchan*0.4,
1.0/self.nchan*0.1,
filter.firdes.WIN_HANN)
if options.verbose:
print "Channel filter has", len(taps), "taps"
self.bank = filter.analysis_filterbank(self.nchan, taps)
self.connect(self.u, self.bank)
if options.log and options.from_file == None:
src_sink = blocks.file_sink(gr.sizeof_gr_complex, 'usrp.dat')
self.connect(self.u, src_sink)
mid_chan = int(self.nchan/2)
for i in range(self.nchan):
if i < mid_chan:
freq = options.freq+i*25e3
else:
freq = options.freq-(self.nchan-i)*25e3
if (freq < 929.0e6 or freq > 932.0e6):
self.connect((self.bank, i), blocks.null_sink(gr.sizeof_gr_complex))
else:
self.connect((self.bank, i), pager.flex_demod(queue, freq, options.verbose, options.log))
if options.log:
self.connect((self.bank, i), blocks.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=929.5125e6,
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")
parser.add_option("", "--nchan", type="int", default=None,
help="set to number of channels in capture file", metavar="nchan")
(options, args) = parser.parse_args()
if len(args) > 0:
print "Run 'usrp_flex_all.py -h' for options."
sys.exit(1)
if options.nchan is None and options.from_file is not None:
print "You must specify the number of baseband channels with --nchan when reading from a file"
sys.exit(1)
return (options, args)
def 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()
if __name__ == "__main__":
main()
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