3 # Copyright 2005,2006,2007 Free Software Foundation, Inc.
5 # This file is part of GNU Radio
7 # GNU Radio is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3, or (at your option)
12 # GNU Radio is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Radio; see the file COPYING. If not, write to
19 # the Free Software Foundation, Inc., 51 Franklin Street,
20 # Boston, MA 02110-1301, USA.
23 from gnuradio import gr, gru, eng_notation, optfir
24 from gnuradio import audio
25 from gnuradio import usrp
26 from gnuradio import blks2
27 from gnuradio.eng_option import eng_option
28 from gnuradio.wxgui import slider, powermate
29 from gnuradio.wxgui import stdgui2, fftsink2, form
30 from optparse import OptionParser
31 from usrpm import usrp_dbid
36 def pick_subdevice(u):
38 The user didn't specify a subdevice on the command line.
39 Try for one of these, in order: TV_RX, BASIC_RX, whatever is on side A.
43 return usrp.pick_subdev(u, (usrp_dbid.TV_RX,
44 usrp_dbid.TV_RX_REV_2,
45 usrp_dbid.TV_RX_REV_3,
47 usrp_dbid.TV_RX_REV_2_MIMO,
48 usrp_dbid.TV_RX_REV_3_MIMO,
52 class wxapt_rx_block (stdgui2.std_top_block):
53 def __init__(self,frame,panel,vbox,argv):
54 stdgui2.std_top_block.__init__ (self,frame,panel,vbox,argv)
56 parser=OptionParser(option_class=eng_option)
57 parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
58 help="select USRP Rx side A or B (default=A)")
59 parser.add_option("-f", "--freq", type="eng_float", default=137.5e6,
60 help="set frequency to FREQ", metavar="FREQ")
61 parser.add_option("-g", "--gain", type="eng_float", default=None,
62 help="set gain in dB (default is midpoint)")
63 parser.add_option("-V", "--volume", type="eng_float", default=None,
64 help="set volume (default is midpoint)")
65 parser.add_option("-O", "--audio-output", type="string", default="",
66 help="pcm device name. E.g., hw:0,0 or surround51 or /dev/dsp")
68 (options, args) = parser.parse_args()
82 self.u = usrp.source_c() # usrp is data source
84 adc_rate = self.u.adc_rate() # 64 MS/s
86 self.u.set_decim_rate(usrp_decim)
87 usrp_rate = adc_rate / usrp_decim # 320 kS/s
89 demod_rate = usrp_rate / chanfilt_decim
91 audio_rate = demod_rate / audio_decimation # 32 kHz
93 if options.rx_subdev_spec is None:
94 options.rx_subdev_spec = pick_subdevice(self.u)
96 self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
97 self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
98 print "Using RX d'board %s" % (self.subdev.side_and_name(),)
101 chan_filt_coeffs = optfir.low_pass (1, # gain
102 usrp_rate, # sampling rate
103 40e3, # passband cutoff
104 60e3, # stopband cutoff
105 0.1, # passband ripple
106 60) # stopband attenuation
107 #print len(chan_filt_coeffs)
108 chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs)
110 self.guts = blks2.wfm_rcv (demod_rate, audio_decimation)
112 self.volume_control = gr.multiply_const_ff(self.vol)
114 # sound card as final sink
115 audio_sink = audio.sink (int (audio_rate), options.audio_output)
117 # now wire it all together
118 self.connect (self.u, chan_filt, self.guts, self.volume_control, audio_sink)
120 self._build_gui(vbox, usrp_rate, demod_rate, audio_rate)
122 if options.gain is None:
123 # if no gain was specified, use the mid-point in dB
124 g = self.subdev.gain_range()
125 options.gain = float(g[0]+g[1])/2
127 if options.volume is None:
128 g = self.volume_range()
129 options.volume = float(g[0]+g[1])/2
131 if abs(options.freq) < 1e6:
136 self.set_gain(options.gain)
137 self.set_vol(options.volume)
138 if not(self.set_freq(options.freq)):
139 self._set_status_msg("Failed to set initial frequency")
142 def _set_status_msg(self, msg, which=0):
143 self.frame.GetStatusBar().SetStatusText(msg, which)
146 def _build_gui(self, vbox, usrp_rate, demod_rate, audio_rate):
148 def _form_set_freq(kv):
149 return self.set_freq(kv['freq'])
153 self.src_fft = fftsink2.fft_sink_c (self.panel, title="Data from USRP",
154 fft_size=512, sample_rate=usrp_rate,
155 ref_scale=32768.0, ref_level=0, y_divs=12)
156 self.connect (self.u, self.src_fft)
157 vbox.Add (self.src_fft.win, 4, wx.EXPAND)
160 post_deemph_fft = fftsink2.fft_sink_f (self.panel, title="Post Deemph",
161 fft_size=512, sample_rate=demod_rate,
162 y_per_div=10, ref_level=-20)
163 self.connect (self.guts.deemph, post_deemph_fft)
164 vbox.Add (post_deemph_fft.win, 4, wx.EXPAND)
167 post_filt_fft = fftsink2.fft_sink_f (self.panel, title="Post Filter",
168 fft_size=512, sample_rate=audio_rate,
169 y_per_div=10, ref_level=0)
170 self.connect (self.guts.audio_filter, post_filt_fft)
171 vbox.Add (post_filt_fft.win, 4, wx.EXPAND)
174 # control area form at bottom
175 self.myform = myform = form.form()
177 hbox = wx.BoxSizer(wx.HORIZONTAL)
179 myform['freq'] = form.float_field(
180 parent=self.panel, sizer=hbox, label="Freq", weight=1,
181 callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
184 myform['freq_slider'] = \
185 form.quantized_slider_field(parent=self.panel, sizer=hbox, weight=3,
186 range=(137.0e6, 138.0e6, 0.0005e6),
187 callback=self.set_freq)
189 vbox.Add(hbox, 0, wx.EXPAND)
191 hbox = wx.BoxSizer(wx.HORIZONTAL)
195 form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Volume",
196 weight=3, range=self.volume_range(),
197 callback=self.set_vol)
201 form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Gain",
202 weight=3, range=self.subdev.gain_range(),
203 callback=self.set_gain)
205 vbox.Add(hbox, 0, wx.EXPAND)
208 self.knob = powermate.powermate(self.frame)
210 powermate.EVT_POWERMATE_ROTATE (self.frame, self.on_rotate)
211 powermate.EVT_POWERMATE_BUTTON (self.frame, self.on_button)
213 print "FYI: No Powermate or Contour Knob found"
216 def on_rotate (self, event):
217 self.rot += event.delta
218 if (self.state == "FREQ"):
220 self.set_freq(self.freq + .1e6)
223 self.set_freq(self.freq - .1e6)
226 step = self.volume_range()[2]
228 self.set_vol(self.vol + step)
231 self.set_vol(self.vol - step)
234 def on_button (self, event):
235 if event.value == 0: # button up
238 if self.state == "FREQ":
242 self.update_status_bar ()
245 def set_vol (self, vol):
246 g = self.volume_range()
247 self.vol = max(g[0], min(g[1], vol))
248 self.volume_control.set_k(10**(self.vol/10))
249 self.myform['volume'].set_value(self.vol)
250 self.update_status_bar ()
252 def set_freq(self, target_freq):
254 Set the center frequency we're interested in.
256 @param target_freq: frequency in Hz
259 Tuning is a two step process. First we ask the front-end to
260 tune as close to the desired frequency as it can. Then we use
261 the result of that operation and our target_frequency to
262 determine the value for the digital down converter.
264 r = usrp.tune(self.u, 0, self.subdev, target_freq)
267 self.freq = target_freq
268 self.myform['freq'].set_value(target_freq) # update displayed value
269 self.myform['freq_slider'].set_value(target_freq) # update displayed value
270 self.update_status_bar()
271 self._set_status_msg("OK", 0)
274 self._set_status_msg("Failed", 0)
277 def set_gain(self, gain):
278 self.myform['gain'].set_value(gain) # update displayed value
279 self.subdev.set_gain(gain)
281 def update_status_bar (self):
282 msg = "Volume:%r Setting:%s" % (self.vol, self.state)
283 self._set_status_msg(msg, 1)
284 self.src_fft.set_baseband_freq(self.freq)
286 def volume_range(self):
287 return (-20.0, 0.0, 0.5)
290 if __name__ == '__main__':
291 app = stdgui2.stdapp (wxapt_rx_block, "USRP WXAPT RX")