diff options
Diffstat (limited to 'gr-gpio/src/python/gpio_rx_sfile.py')
| -rwxr-xr-x | gr-gpio/src/python/gpio_rx_sfile.py | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/gr-gpio/src/python/gpio_rx_sfile.py b/gr-gpio/src/python/gpio_rx_sfile.py new file mode 100755 index 0000000000..ac4d608bf6 --- /dev/null +++ b/gr-gpio/src/python/gpio_rx_sfile.py @@ -0,0 +1,121 @@ +#!/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 |