diff options
Diffstat (limited to 'gnuradio-examples/python/usrp/usrp_wfm_rcv_nogui.py')
| -rwxr-xr-x | gnuradio-examples/python/usrp/usrp_wfm_rcv_nogui.py | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/gnuradio-examples/python/usrp/usrp_wfm_rcv_nogui.py b/gnuradio-examples/python/usrp/usrp_wfm_rcv_nogui.py deleted file mode 100755 index 217f207c5..000000000 --- a/gnuradio-examples/python/usrp/usrp_wfm_rcv_nogui.py +++ /dev/null @@ -1,177 +0,0 @@ -#!/usr/bin/env python -# -# Copyright 2005,2006,2007 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, eng_notation, optfir -from gnuradio import audio -from gnuradio import usrp -from gnuradio import blks2 -from gnuradio.eng_option import eng_option -from optparse import OptionParser -from usrpm import usrp_dbid -import sys -import math - -def pick_subdevice(u): - """ - The user didn't specify a subdevice on the command line. - Try for one of these, in order: TV_RX, BASIC_RX, whatever is on side A. - - @return a subdev_spec - """ - return usrp.pick_subdev(u, (usrp_dbid.TV_RX, - usrp_dbid.TV_RX_REV_2, - usrp_dbid.TV_RX_REV_3, - usrp_dbid.TV_RX_MIMO, - usrp_dbid.TV_RX_REV_2_MIMO, - usrp_dbid.TV_RX_REV_3_MIMO, - usrp_dbid.BASIC_RX)) - - -class wfm_rx_block (gr.top_block): - - def __init__(self): - gr.top_block.__init__(self) - - parser=OptionParser(option_class=eng_option) - parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None, - help="select USRP Rx side A or B (default=A)") - parser.add_option("-f", "--freq", type="eng_float", default=100.1e6, - 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("-O", "--audio-output", type="string", default="", - help="pcm device name. E.g., hw:0,0 or surround51 or /dev/dsp") - - (options, args) = parser.parse_args() - if len(args) != 0: - parser.print_help() - sys.exit(1) - - self.vol = .1 - self.state = "FREQ" - self.freq = 0 - - # build graph - - self.u = usrp.source_c() # usrp is data source - - adc_rate = self.u.adc_rate() # 64 MS/s - usrp_decim = 200 - self.u.set_decim_rate(usrp_decim) - usrp_rate = adc_rate / usrp_decim # 320 kS/s - chanfilt_decim = 1 - demod_rate = usrp_rate / chanfilt_decim - audio_decimation = 10 - audio_rate = demod_rate / audio_decimation # 32 kHz - - - if options.rx_subdev_spec is None: - options.rx_subdev_spec = pick_subdevice(self.u) - - self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec)) - self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec) - print "Using RX d'board %s" % (self.subdev.side_and_name(),) - - - chan_filt_coeffs = optfir.low_pass (1, # gain - usrp_rate, # sampling rate - 80e3, # passband cutoff - 115e3, # stopband cutoff - 0.1, # passband ripple - 60) # stopband attenuation - #print len(chan_filt_coeffs) - chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs) - - self.guts = blks2.wfm_rcv (demod_rate, audio_decimation) - - self.volume_control = gr.multiply_const_ff(self.vol) - - # sound card as final sink - audio_sink = audio.sink(int(audio_rate), - options.audio_output, - False) # ok_to_block - - # now wire it all together - self.connect (self.u, chan_filt, self.guts, self.volume_control, audio_sink) - - - 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 - - if abs(options.freq) < 1e6: - options.freq *= 1e6 - - # set initial values - - self.set_gain(options.gain) - - if not(self.set_freq(options.freq)): - self._set_status_msg("Failed to set initial frequency") - - def set_vol (self, vol): - self.vol = vol - self.volume_control.set_k(self.vol) - self.update_status_bar () - - def set_freq(self, target_freq): - """ - Set the center frequency we're interested in. - - @param target_freq: frequency in Hz - @rypte: bool - - Tuning is a two step process. First we ask the front-end to - tune as close to the desired frequency as it can. Then we use - the result of that operation and our target_frequency to - determine the value for the digital down converter. - """ - r = self.u.tune(0, self.subdev, target_freq) - - if r: - self.freq = target_freq - self.update_status_bar() - self._set_status_msg("OK", 0) - return True - - self._set_status_msg("Failed", 0) - return False - - def set_gain(self, gain): - self.subdev.set_gain(gain) - - def update_status_bar (self): - msg = "Freq: %s Volume:%f Setting:%s" % ( - eng_notation.num_to_str(self.freq), self.vol, self.state) - self._set_status_msg(msg, 1) - - def _set_status_msg(self, msg, which=0): - print msg - - -if __name__ == '__main__': - tb = wfm_rx_block() - try: - tb.run() - except KeyboardInterrupt: - pass |