diff options
Diffstat (limited to 'gr-utils/src/python/usrp_rx_nogui.py')
| -rwxr-xr-x | gr-utils/src/python/usrp_rx_nogui.py | 71 |
1 files changed, 49 insertions, 22 deletions
diff --git a/gr-utils/src/python/usrp_rx_nogui.py b/gr-utils/src/python/usrp_rx_nogui.py index b33d626e28..a5d792c8b8 100755 --- a/gr-utils/src/python/usrp_rx_nogui.py +++ b/gr-utils/src/python/usrp_rx_nogui.py @@ -1,8 +1,29 @@ #!/usr/bin/env python - -from gnuradio import gr, gru, usrp, optfir, audio, eng_notation, blks +# +# Copyright 2006,2007 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, gru, usrp, optfir, audio, eng_notation, blks2 from gnuradio.eng_option import eng_option from optparse import OptionParser +import sys """ This example application demonstrates receiving and demodulating @@ -47,12 +68,12 @@ blocks. # (usrp_decim, channel_decim, audio_decim, channel_pass, channel_stop, demod) demod_params = { - 'AM' : (250, 16, 1, 5000, 8000, blks.demod_10k0a3e_cf), - 'FM' : (250, 8, 4, 8000, 9000, blks.demod_20k0f3e_cf), - 'WFM' : (250, 1, 8, 90000, 100000, blks.demod_200kf3e_cf) + 'AM' : (250, 16, 1, 5000, 8000, blks2.demod_10k0a3e_cf), + 'FM' : (250, 8, 4, 8000, 9000, blks2.demod_20k0f3e_cf), + 'WFM' : (250, 1, 8, 90000, 100000, blks2.demod_200kf3e_cf) } -class usrp_source_c(gr.hier_block): +class usrp_src(gr.hier_block2): """ Create a USRP source object supplying complex floats. @@ -61,7 +82,11 @@ class usrp_source_c(gr.hier_block): Calibration value is the offset from the tuned frequency to the actual frequency. """ - def __init__(self, fg, subdev_spec, decim, gain=None, calibration=0.0): + def __init__(self, subdev_spec, decim, gain=None, calibration=0.0): + gr.hier_block2.__init__(self, "usrp_src", + gr.io_signature(0, 0, 0), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature + self._decim = decim self._src = usrp.source_c() if subdev_spec is None: @@ -77,7 +102,7 @@ class usrp_source_c(gr.hier_block): self._subdev.set_gain(gain) self._cal = calibration - gr.hier_block.__init__(self, fg, self._src, self._src) + self.connect(self._src, self) def tune(self, freq): result = usrp.tune(self._src, 0, self._subdev, freq+self._cal) @@ -86,20 +111,18 @@ class usrp_source_c(gr.hier_block): def rate(self): return self._src.adc_rate()/self._decim -class app_flow_graph(gr.flow_graph): - def __init__(self, options, args): - gr.flow_graph.__init__(self) +class app_top_block(gr.top_block): + def __init__(self, options): + gr.top_block.__init__(self) self.options = options - self.args = args (usrp_decim, channel_decim, audio_decim, channel_pass, channel_stop, demod) = demod_params[options.modulation] - USRP = usrp_source_c(self, # Flow graph - options.rx_subdev_spec, # Daugherboard spec - usrp_decim, # IF decimation ratio - options.gain, # Receiver gain - options.calibration) # Frequency offset + USRP = usrp_src(options.rx_subdev_spec, # Daugherboard spec + usrp_decim, # IF decimation ratio + options.gain, # Receiver gain + options.calibration) # Frequency offset USRP.tune(options.frequency) if_rate = USRP.rate() @@ -128,7 +151,7 @@ class app_flow_graph(gr.flow_graph): 1.0, # Initial gain 1.0) # Maximum gain - DEMOD = demod(self, channel_rate, audio_decim) + DEMOD = demod(channel_rate, audio_decim) # From RF to audio self.connect(USRP, CHAN, RFSQL, AGC, DEMOD) @@ -145,7 +168,7 @@ class app_flow_graph(gr.flow_graph): out_lcm = gru.lcm(audio_rate, options.output_rate) out_interp = int(out_lcm // audio_rate) out_decim = int(out_lcm // options.output_rate) - RSAMP = blks.rational_resampler_fff(self, out_interp, out_decim) + RSAMP = blks2.rational_resampler_fff(out_interp, out_decim) self.connect(tail, RSAMP) tail = RSAMP @@ -155,7 +178,7 @@ class app_flow_graph(gr.flow_graph): def main(): parser = OptionParser(option_class=eng_option) - parser.add_option("-f", "--frequency", type="eng_float", + parser.add_option("-f", "--frequency", type="eng_float", default=None, help="set receive frequency to Hz", metavar="Hz") parser.add_option("-R", "--rx-subdev-spec", type="subdev", help="select USRP Rx side A or B", metavar="SUBDEV") @@ -173,12 +196,16 @@ def main(): help="set CTCSS squelch to FREQ", metavar="FREQ") (options, args) = parser.parse_args() + if options.frequency is None: + print "Must supply receive frequency with -f" + sys.exit(1) + if options.frequency < 1e6: options.frequency *= 1e6 - fg = app_flow_graph(options, args) + tb = app_top_block(options) try: - fg.run() + tb.run() except KeyboardInterrupt: pass |