--- /dev/null
+#!/usr/bin/env python
+#
+# Copyright 2004,2005,2007,2008,2009 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.
+#
+
+"""
+Read samples from the USRP2 and write to file formatted as binary
+outputs single precision complex float values or complex short values
+(interleaved 16 bit signed short integers).
+"""
+
+from gnuradio import gr, eng_notation
+from gnuradio import usrp2
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+import sys
+
+n2s = eng_notation.num_to_str
+
+class rx_cfile_block(gr.top_block):
+
+ def __init__(self, options, filename):
+ gr.top_block.__init__(self)
+
+ # Create a USRP2 source
+ if options.output_shorts:
+ self._u = usrp2.source_16sc(options.interface, options.mac_addr)
+ self._sink = gr.file_sink(gr.sizeof_short*2, filename)
+ else:
+ self._u = usrp2.source_32fc(options.interface, options.mac_addr)
+ self._sink = gr.file_sink(gr.sizeof_gr_complex, filename)
+
+ # Set receiver decimation rate
+ self._u.set_decim(options.decim)
+
+ # Set receive daughterboard gain
+ if options.gain is None:
+ g = self._u.gain_range()
+ options.gain = float(g[0]+g[1])/2
+ print "Using mid-point gain of", options.gain, "(", g[0], "-", g[1], ")"
+ self._u.set_gain(options.gain)
+
+ # Set receive frequency
+ if options.lo_offset is not None:
+ self._u.set_lo_offset(options.lo_offset)
+
+ tr = self._u.set_center_freq(options.freq)
+ if tr == None:
+ sys.stderr.write('Failed to set center frequency\n')
+ raise SystemExit, 1
+
+ # Create head block if needed and wire it up
+ if options.nsamples is None:
+ self.connect(self._u, self._sink)
+ else:
+ if options.output_shorts:
+ self._head = gr.head(gr.sizeof_short*2, int(options.nsamples))
+ else:
+ self._head = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
+
+ self.connect(self._u, self._head, self._sink)
+
+ input_rate = self._u.adc_rate()/self._u.decim()
+
+ if options.verbose:
+ print "Network interface:", options.interface
+ print "USRP2 address:", self._u.mac_addr()
+ print "Using RX d'board id 0x%04X" % (self._u.daughterboard_id(),)
+ print "Rx gain:", options.gain
+ print "Rx baseband frequency:", n2s(tr.baseband_freq)
+ print "Rx DDC frequency:", n2s(tr.dxc_freq)
+ print "Rx residual frequency:", n2s(tr.residual_freq)
+ print "Rx decimation rate:", options.decim
+ print "Rx sample rate:", n2s(input_rate)
+ if options.nsamples is None:
+ print "Receiving samples until Ctrl-C"
+ else:
+ print "Receving", n2s(options.nsamples), "samples"
+ if options.output_shorts:
+ print "Writing 16-bit complex shorts"
+ else:
+ print "Writing 32-bit complex floats"
+ print "Output filename:", filename
+
+def get_options():
+ usage="%prog: [options] output_filename"
+ parser = OptionParser(option_class=eng_option, usage=usage)
+ parser.add_option("-e", "--interface", type="string", default="eth0",
+ help="use specified Ethernet interface [default=%default]")
+ parser.add_option("-m", "--mac-addr", type="string", default="",
+ help="use USRP2 at specified MAC address [default=None]")
+ parser.add_option("-d", "--decim", type="int", default=16,
+ help="set fgpa decimation rate to DECIM [default=%default]")
+ parser.add_option("-f", "--freq", type="eng_float", default=None,
+ help="set frequency to FREQ", metavar="FREQ")
+ parser.add_option("-g", "--gain", type="eng_float", default=None,
+ help="set gain in dB (default is midpoint)")
+ parser.add_option( "-s","--output-shorts", action="store_true", default=False,
+ help="output interleaved shorts instead of complex floats")
+ parser.add_option("-N", "--nsamples", type="eng_float", default=None,
+ help="number of samples to collect [default=+inf]")
+ parser.add_option("-v", "--verbose", action="store_true", default=False,
+ help="verbose output")
+ parser.add_option("", "--lo-offset", type="eng_float", default=None,
+ help="set daughterboard LO offset to OFFSET [default=hw default]")
+
+ (options, args) = parser.parse_args ()
+ if len(args) != 1:
+ parser.print_help()
+ raise SystemExit, 1
+
+ if options.freq is None:
+ parser.print_help()
+ sys.stderr.write('You must specify the frequency with -f FREQ\n');
+ raise SystemExit, 1
+
+ return (options, args[0])
+
+
+if __name__ == '__main__':
+ (options, filename) = get_options()
+ tb = rx_cfile_block(options, filename)
+
+ try:
+ tb.run()
+ except KeyboardInterrupt:
+ pass
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