--- /dev/null
+#!/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 gnuradio.wxgui import slider, powermate
+from gnuradio.wxgui import stdgui2, fftsink2, form, scopesink2
+from optparse import OptionParser
+from usrpm import usrp_dbid
+import sys
+import math
+import wx
+
+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.BASIC_RX))
+
+class wfm_rx_block (stdgui2.std_top_block):
+ def __init__(self,frame,panel,vbox,argv):
+ stdgui2.std_top_block.__init__ (self,frame,panel,vbox,argv)
+
+ 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=65,
+ help="set gain in dB (default is midpoint)")
+ parser.add_option("-s", "--squelch", type="eng_float", default=0,
+ help="set squelch level (default is 0)")
+ parser.add_option("-V", "--volume", type="eng_float", default=None,
+ help="set volume (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.frame = frame
+ self.panel = panel
+
+ self.vol = 0
+ 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 = 3*demod_rate / audio_decimation/2 # 48 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)
+
+
+ chan_filt_coeffs = gr.firdes.low_pass_2 (1, # gain
+ usrp_rate, # sampling rate
+ 90e3, # passband cutoff
+ 30e3, # transition bandwidth
+ 70, # stopband attenuation
+ gr.firdes.WIN_BLACKMAN)
+ print len(chan_filt_coeffs)
+ chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs)
+
+ self.rchan_sample = blks2.rational_resampler_fff(3,2)
+ self.lchan_sample = blks2.rational_resampler_fff(3,2)
+
+
+ #self.guts = blks2.wfm_rcv (demod_rate, audio_decimation)
+ self.guts = blks2.wfm_rcv_fmdet (demod_rate, audio_decimation)
+
+ # FIXME rework {add,multiply}_const_* to handle multiple streams
+ self.volume_control_l = gr.multiply_const_ff(self.vol)
+ self.volume_control_r = 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.connect((self.guts, 0), self.lchan_sample,self.volume_control_l,(audio_sink,0))
+ self.connect((self.guts, 1), self.rchan_sample,self.volume_control_r,(audio_sink,1))
+
+ try:
+ self.guts.stereo_carrier_pll_recovery.squelch_enable(True)
+ except:
+ print "FYI: This implementation of the stereo_carrier_pll_recovery has no squelch implementation yet"
+
+
+ self._build_gui(vbox, usrp_rate, demod_rate, audio_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
+
+ if options.volume is None:
+ g = self.volume_range()
+ options.volume = float(g[0]+g[1])/2
+
+ if abs(options.freq) < 1e6:
+ options.freq *= 1e6
+
+ # set initial values
+
+ self.set_gain(options.gain)
+ self.set_vol(options.volume)
+ try:
+ self.guts.stereo_carrier_pll_recovery.set_lock_threshold(options.squelch)
+ except:
+ print "FYI: This implementation of the stereo_carrier_pll_recovery has no squelch implementation yet"
+
+ if not(self.set_freq(options.freq)):
+ self._set_status_msg("Failed to set initial frequency")
+
+
+ def _set_status_msg(self, msg, which=0):
+ self.frame.GetStatusBar().SetStatusText(msg, which)
+
+
+ def _build_gui(self, vbox, usrp_rate, demod_rate, audio_rate):
+
+ def _form_set_freq(kv):
+ return self.set_freq(kv['freq'])
+
+
+ if 1:
+ self.src_fft = fftsink2.fft_sink_c(self.panel, title="Data from USRP",
+ fft_size=512, sample_rate=usrp_rate,
+ ref_scale=32768.0, ref_level=0, y_divs=12)
+ self.connect (self.u, self.src_fft)
+ vbox.Add (self.src_fft.win, 4, wx.EXPAND)
+
+ if 1:
+ post_fm_demod_fft = fftsink2.fft_sink_f(self.panel, title="Post FM Demod",
+ fft_size=512, sample_rate=demod_rate,
+ y_per_div=10, ref_level=0)
+ self.connect (self.guts.fm_demod, post_fm_demod_fft)
+ vbox.Add (post_fm_demod_fft.win, 4, wx.EXPAND)
+
+ if 0:
+ post_stereo_carrier_generator_fft = fftsink2.fft_sink_c (self.panel, title="Post Stereo_carrier_generator",
+ fft_size=512, sample_rate=audio_rate,
+ y_per_div=10, ref_level=0)
+ self.connect (self.guts.stereo_carrier_generator, post_stereo_carrier_generator_fft)
+ vbox.Add (post_stereo_carrier_generator_fft.win, 4, wx.EXPAND)
+
+ if 0:
+ post_deemphasis_left = fftsink2.fft_sink_f (self.panel, title="Post_Deemphasis_Left",
+ fft_size=512, sample_rate=audio_rate,
+ y_per_div=10, ref_level=0)
+ self.connect (self.guts.deemph_Left, post_deemphasis_left)
+ vbox.Add (post_deemphasis_left.win, 4, wx.EXPAND)
+
+ if 0:
+ post_deemphasis_right = fftsink2.fft_sink_f(self.panel, title="Post_Deemphasis_Right",
+ fft_size=512, sample_rate=audio_rate,
+ y_per_div=10, ref_level=-20)
+ self.connect (self.guts.deemph_Left, post_deemphasis_right)
+ vbox.Add (post_deemphasis_right.win, 4, wx.EXPAND)
+
+
+ if 0:
+ LmR_fft = fftsink2.fft_sink_f(self.panel, title="LmR",
+ fft_size=512, sample_rate=audio_rate,
+ y_per_div=10, ref_level=-20)
+ self.connect (self.guts.LmR_real,LmR_fft)
+ vbox.Add (LmR_fft.win, 4, wx.EXPAND)
+
+ if 0:
+ self.scope = scopesink2.scope_sink_f(self.panel, sample_rate=demod_rate)
+ self.connect (self.guts.fm_demod,self.scope)
+ vbox.Add (self.scope.win,4,wx.EXPAND)
+
+ # control area form at bottom
+ self.myform = myform = form.form()
+
+ hbox = wx.BoxSizer(wx.HORIZONTAL)
+ hbox.Add((5,0), 0)
+ myform['freq'] = form.float_field(
+ parent=self.panel, sizer=hbox, label="Freq", weight=1,
+ callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
+
+ hbox.Add((5,0), 0)
+ myform['freq_slider'] = \
+ form.quantized_slider_field(parent=self.panel, sizer=hbox, weight=3,
+ range=(87.9e6, 108.1e6, 0.1e6),
+ callback=self.set_freq)
+ hbox.Add((5,0), 0)
+ vbox.Add(hbox, 0, wx.EXPAND)
+
+ hbox = wx.BoxSizer(wx.HORIZONTAL)
+ hbox.Add((5,0), 0)
+
+ myform['volume'] = \
+ form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Volume",
+ weight=3, range=self.volume_range(),
+ callback=self.set_vol)
+ hbox.Add((5,0), 1)
+
+ myform['gain'] = \
+ form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Gain",
+ weight=3, range=self.subdev.gain_range(),
+ callback=self.set_gain)
+ hbox.Add((5,0), 0)
+
+ myform['sqlch_thrsh'] = \
+ form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Stereo Squelch Threshold",
+ weight=3, range=(0.0,1.0,0.01),
+ callback=self.set_squelch)
+ hbox.Add((5,0), 0)
+ vbox.Add(hbox, 0, wx.EXPAND)
+
+ try:
+ self.knob = powermate.powermate(self.frame)
+ self.rot = 0
+ powermate.EVT_POWERMATE_ROTATE (self.frame, self.on_rotate)
+ powermate.EVT_POWERMATE_BUTTON (self.frame, self.on_button)
+ except:
+ print "FYI: No Powermate or Contour Knob found"
+
+
+ def on_rotate (self, event):
+ self.rot += event.delta
+ if (self.state == "FREQ"):
+ if self.rot >= 3:
+ self.set_freq(self.freq + .1e6)
+ self.rot -= 3
+ elif self.rot <=-3:
+ self.set_freq(self.freq - .1e6)
+ self.rot += 3
+ else:
+ step = self.volume_range()[2]
+ if self.rot >= 3:
+ self.set_vol(self.vol + step)
+ self.rot -= 3
+ elif self.rot <=-3:
+ self.set_vol(self.vol - step)
+ self.rot += 3
+
+ def on_button (self, event):
+ if event.value == 0: # button up
+ return
+ self.rot = 0
+ if self.state == "FREQ":
+ self.state = "VOL"
+ else:
+ self.state = "FREQ"
+ self.update_status_bar ()
+
+
+ def set_vol (self, vol):
+ g = self.volume_range()
+ self.vol = max(g[0], min(g[1], vol))
+ self.volume_control_l.set_k(10**(self.vol/10))
+ self.volume_control_r.set_k(10**(self.vol/10))
+ self.myform['volume'].set_value(self.vol)
+ self.update_status_bar ()
+
+ def set_squelch(self,squelch_threshold):
+ try:
+ self.guts.stereo_carrier_pll_recovery.set_lock_threshold(squelch_threshold);
+ except:
+ print "FYI: This implementation of the stereo_carrier_pll_recovery has no squelch implementation yet"
+
+ 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 = usrp.tune(self.u, 0, self.subdev, target_freq)
+
+ if r:
+ self.freq = target_freq
+ self.myform['freq'].set_value(target_freq) # update displayed value
+ self.myform['freq_slider'].set_value(target_freq) # update displayed value
+ 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.myform['gain'].set_value(gain) # update displayed value
+ self.subdev.set_gain(gain)
+
+ def update_status_bar (self):
+ msg = "Volume:%r Setting:%s" % (self.vol, self.state)
+ self._set_status_msg(msg, 1)
+ self.src_fft.set_baseband_freq(self.freq)
+
+ def volume_range(self):
+ return (-20.0, 0.0, 0.5)
+
+
+if __name__ == '__main__':
+ app = stdgui2.stdapp (wfm_rx_block, "USRP WFM RX")
+ app.MainLoop ()
projects / debian / gnuradio / blobdiff