+++ /dev/null
-#!/usr/bin/env python
-
-"""
-Read samples from the USRP 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 audio
-from gnuradio import usrp
-from gnuradio.eng_option import eng_option
-from optparse import OptionParser
-
-class my_graph(gr.flow_graph):
-
- def __init__(self):
- gr.flow_graph.__init__(self)
-
- usage="%prog: [options] output_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("-8", "--width-8", action="store_true", default=False,
- help="Enable 8-bit samples across USB")
- parser.add_option( "--no-hb", action="store_true", default=False,
- help="don't use halfband filter in usrp")
- parser.add_option( "-s","--output-shorts", action="store_true", default=False,
- help="output interleaved shorts in stead of complex floats")
- parser.add_option("-N", "--nsamples", type="eng_float", default=None,
- help="number of samples to collect [default=+inf]")
- (options, args) = parser.parse_args ()
- if len(args) != 1:
- parser.print_help()
- raise SystemExit, 1
- filename = args[0]
-
- if options.freq is None:
- parser.print_help()
- sys.stderr.write('You must specify the frequency with -f FREQ\n');
- raise SystemExit, 1
-
- # build the graph
- if options.no_hb or (options.decim<8):
- self.fpga_filename="std_4rx_0tx.rbf" #Min decimation of this firmware is 4. contains 4 Rx paths without halfbands and 0 tx paths.
- if options.output_shorts:
- self.u = usrp.source_s(decim_rate=options.decim,fpga_filename=self.fpga_filename)
- else:
- self.u = usrp.source_c(decim_rate=options.decim,fpga_filename=self.fpga_filename)
- else:
- #standard fpga firmware "std_2rxhb_2tx.rbf" contains 2 Rx paths with halfband filters and 2 tx paths (the default) min decimation 8
- if options.output_shorts:
- self.u = usrp.source_s(decim_rate=options.decim)
- else:
- self.u = usrp.source_c(decim_rate=options.decim)
- if options.width_8:
- sample_width = 8
- sample_shift = 8
- format = self.u.make_format(sample_width, sample_shift)
- r = self.u.set_format(format)
- if options.output_shorts:
- self.dst = gr.file_sink(gr.sizeof_short, filename)
- else:
- self.dst = gr.file_sink(gr.sizeof_gr_complex, filename)
- if options.nsamples is None:
- self.connect(self.u, self.dst)
- else:
- if options.output_shorts:
- self.head = gr.head(gr.sizeof_short, int(options.nsamples)*2)
- else:
- self.head = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
- self.connect(self.u, self.head, self.dst)
-
- if options.rx_subdev_spec is None:
- options.rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
- self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
-
- # determine the daughterboard subdevice we're using
- self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
- print "Using RX d'board %s" % (self.subdev.side_and_name(),)
- input_rate = self.u.adc_freq() / self.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 = self.subdev.gain_range()
- options.gain = float(g[0]+g[1])/2
-
- self.subdev.set_gain(options.gain)
-
- r = self.u.tune(0, self.subdev, options.freq)
- if not r:
- sys.stderr.write('Failed to set frequency\n')
- raise SystemExit, 1
-
-
-if __name__ == '__main__':
- try:
- my_graph().run()
- except KeyboardInterrupt:
- pass
projects / debian / gnuradio / blobdiff