--- /dev/null
+#!/usr/bin/env python
+#
+# Copyright 2008 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, eng_notation
+from gnuradio import usrp
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+import sys
+
+from gnuradio import gpio
+
+class my_top_block(gr.top_block):
+
+ def __init__(self, options):
+ gr.top_block.__init__(self)
+
+ # Create a USRP source with GPIO FPGA build, then configure
+ u = usrp.source_s(decim_rate=options.decim,fpga_filename=gpio.fpga_filename)
+
+ if options.force_complex_RXA:
+ # This is a dirty hack to force complex mode (receive both I and Q) on basicRX or LFRX
+ # This forces the receive board in RXA (side A) to be used
+ # FIXME: This has as a side effect that the gain for Q is not set. So only use with gain 0 (--gain 0)
+ options.rx_subdev_spec=(0,0)
+ u.set_mux(0x10)
+ if not (0==options.gain):
+ print "WARNING, you should set the gain to 0 with --gain 0 when using --force-complex-RXA"
+ print "The gain for Q will now still be zero while the gain for I is not"
+ #options.gain=0
+ else:
+ if options.rx_subdev_spec is None:
+ options.rx_subdev_spec = usrp.pick_rx_subdevice(u)
+ u.set_mux(usrp.determine_rx_mux_value(u, options.rx_subdev_spec))
+
+ subdev = usrp.selected_subdev(u, options.rx_subdev_spec)
+ print "Using RX d'board %s" % (subdev.side_and_name(),)
+ input_rate = u.adc_freq()/u.decim_rate()
+ print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
+
+ if options.gain is None:
+ # if no gain was specified, use the mid-point in dB
+ g = subdev.gain_range()
+ options.gain = float(g[0]+g[1])/2
+
+
+ #TODO setting gain on basicRX only sets the I channel, use a second subdev to set gain of Q channel
+ #see gnuradio-examples/multi-antenna for possible solutions
+ subdev.set_gain(options.gain)
+
+ #TODO check if freq has same problem as gain when trying to use complex mode on basicRX
+ r = u.tune(0, subdev, options.freq)
+ if not r:
+ sys.stderr.write('Failed to set frequency\n')
+ raise SystemExit, 1
+
+ # Connect pipeline
+ src = u
+ if options.nsamples is not None:
+ head = gr.head(gr.sizeof_short, int(options.nsamples)*2)
+ self.connect(u, head)
+ src = head
+
+ ana_strip = gpio.and_const_ss(0xFFFE)
+ dig_strip = gpio.and_const_ss(0x0001)
+ ana_sink = gr.file_sink(gr.sizeof_short, options.ana_filename)
+ dig_sink = gr.file_sink(gr.sizeof_short, options.dig_filename)
+
+ self.connect(src, ana_strip, ana_sink)
+ self.connect(src, dig_strip, dig_sink)
+
+if __name__ == '__main__':
+ usage="%prog: [options] analog_filename digital_filename"
+ parser = OptionParser(option_class=eng_option, usage=usage)
+ parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=(0, 0),
+ help="select USRP Rx side A or B (default=A)")
+ 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("-N", "--nsamples", type="eng_float", default=None,
+ help="number of samples to collect [default=+inf]")
+ parser.add_option("-F", "--force-complex-RXA", action="store_true", default=False,
+ help="enable basicRX hack to force complex mode on basicRX and LFRX. Only works on side A. Only use with --gain 0")
+ (options, args) = parser.parse_args ()
+ if len(args) != 2:
+ parser.print_help()
+ raise SystemExit, 1
+ options.ana_filename = args[0]
+ options.dig_filename = args[1]
+
+ if options.freq is None:
+ parser.print_help()
+ sys.stderr.write('You must specify the frequency with -f FREQ\n');
+ raise SystemExit, 1
+
+ try:
+ tb = my_top_block(options)
+ tb.run()
+ except KeyboardInterrupt:
+ pass
projects / debian / gnuradio / blobdiff