diff options
Diffstat (limited to 'gnuradio-examples/python/usrp/usrp_wfm_rcv2_nogui.py')
| -rwxr-xr-x | gnuradio-examples/python/usrp/usrp_wfm_rcv2_nogui.py | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/gnuradio-examples/python/usrp/usrp_wfm_rcv2_nogui.py b/gnuradio-examples/python/usrp/usrp_wfm_rcv2_nogui.py deleted file mode 100755 index edfbc3657..000000000 --- a/gnuradio-examples/python/usrp/usrp_wfm_rcv2_nogui.py +++ /dev/null @@ -1,183 +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 calc_dxc_freq(target_freq, baseband_freq, fs): - dxc_temp = (target_freq - baseband_freq) % fs - - if dxc_temp < fs/2.0: - dxc_freq = - dxc_temp - inverted = False - else: - dxc_freq = fs - dxc_temp - inverted = True - - return (dxc_freq, inverted) - -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("", "--f1", type="eng_float", default=100.7e6, - help="set 1st station frequency to FREQ", metavar="FREQ") - parser.add_option("", "--f2", type="eng_float", default=102.5e6, - help="set 2nd station freq to FREQ", metavar="FREQ") - parser.add_option("-g", "--gain", type="eng_float", default=40, - 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) - - if abs(options.f1) < 1e6: - options.f1 *= 1e6 - - if abs(options.f2) < 1e6: - options.f2 *= 1e6 - - if abs(options.f1 - options.f2) > 5.5e6: - print "Sorry, two stations must be within 5.5MHz of each other" - raise SystemExit - - f = (options.f1, options.f2) - - self.vol = .1 - self.state = "FREQ" - - # build graph - - self.u = usrp.source_c(0, nchan=2) # 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) - - mv = usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec) - mv |= (mv << 8) & 0xff00 # both DDC inputs setup same way - self.u.set_mux(mv) - self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec) - print "Using RX d'board %s" % (self.subdev.side_and_name(),) - - - # deinterleave two channels from FPGA - di = gr.deinterleave(gr.sizeof_gr_complex) - - # wire up the head of the chain - self.connect(self.u, di) - - # sound card as final sink - audio_sink = audio.sink(int(audio_rate), options.audio_output) - - # taps for channel filter - 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) - - mid_freq = (f[0] + f[1]) / 2 - # set front end PLL to middle frequency - tune_result = self.subdev.set_freq(mid_freq) - - for n in range(2): - chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs) - guts = blks2.wfm_rcv (demod_rate, audio_decimation) - volume_control = gr.multiply_const_ff(self.vol) - self.connect((di, n), chan_filt) - self.connect(chan_filt, guts, volume_control) - self.connect(volume_control, (audio_sink, n)) - dxc_freq, inverted = calc_dxc_freq(f[n], tune_result.baseband_freq, - self.u.converter_rate()) - self.u.set_rx_freq(n, dxc_freq) - - - 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 - - - # set initial values - self.set_gain(options.gain) - - - def set_vol (self, vol): - self.vol = vol - self.volume_control.set_k(self.vol) - - - def set_gain(self, gain): - self.subdev.set_gain(gain) - - def __del__(self): - # Avoid weak-reference error - del self.subdev - -if __name__ == '__main__': - tb = wfm_rx_block() - try: - tb.run() - except KeyboardInterrupt: - pass |