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   1 #!/usr/bin/env python
   2 #
   3 # Copyright 2004,2005,2007,2008 Free Software Foundation, Inc.
   4 #
   5 # This file is part of GNU Radio
   6 #
   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)
  10 # any later version.
  11 #
  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.
  16 #
  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.
  21 #
  22
  23 from gnuradio import gr, gru
  24 from gnuradio import usrp2
  25 from gnuradio import eng_notation
  26 from gnuradio.eng_option import eng_option
  27 from gnuradio.wxgui import stdgui2, fftsink2, waterfallsink2, scopesink2, form, slider
  28 from optparse import OptionParser
  29 import wx
  30 import sys
  31 import numpy
  32
  33 class app_top_block(stdgui2.std_top_block):
  34     def __init__(self, frame, panel, vbox, argv):
  35         stdgui2.std_top_block.__init__(self, frame, panel, vbox, argv)
  36
  37         self.frame = frame
  38         self.panel = panel
  39
  40         parser = OptionParser(option_class=eng_option)
  41         parser.add_option("-e", "--interface", type="string", default="eth0",
  42                           help="select Ethernet interface, default is eth0")
  43         parser.add_option("-m", "--mac-addr", type="string", default="",
  44                           help="select USRP by MAC address, default is auto-select")
  45         #parser.add_option("-A", "--antenna", default=None,
  46         #                  help="select Rx Antenna (only on RFX-series boards)")
  47         parser.add_option("-d", "--decim", type="int", default=16,
  48                           help="set fgpa decimation rate to DECIM [default=%default]")
  49         parser.add_option("-f", "--freq", type="eng_float", default=None,
  50                           help="set frequency to FREQ", metavar="FREQ")
  51         parser.add_option("-g", "--gain", type="eng_float", default=None,
  52                           help="set gain in dB (default is midpoint)")
  53         parser.add_option("-W", "--waterfall", action="store_true", default=False,
  54                           help="Enable waterfall display")
  55         parser.add_option("-S", "--oscilloscope", action="store_true", default=False,
  56                           help="Enable oscilloscope display")
  57         parser.add_option("", "--avg-alpha", type="eng_float", default=1e-1,
  58                           help="Set fftsink averaging factor, default=[%default]")
  59         parser.add_option("", "--ref-scale", type="eng_float", default=1.0,
  60                           help="Set dBFS=0dB input value, default=[%default]")
  61         parser.add_option("--fft-size", type="int", default=1024,
  62                           help="Set number of FFT bins [default=%default]")
  63         (options, args) = parser.parse_args()
  64         if len(args) != 0:
  65             parser.print_help()
  66             sys.exit(1)
  67         self.options = options
  68         self.show_debug_info = True
  69
  70         self.u = usrp2.source_32fc(options.interface, options.mac_addr)
  71         self.u.set_decim(options.decim)
  72
  73         input_rate = self.u.adc_rate() / self.u.decim()
  74
  75         if options.waterfall:
  76             self.scope = \
  77               waterfallsink2.waterfall_sink_c (panel, fft_size=1024, sample_rate=input_rate)
  78         elif options.oscilloscope:
  79             self.scope = scopesink2.scope_sink_c(panel, sample_rate=input_rate)
  80         else:
  81             self.scope = fftsink2.fft_sink_c (panel,
  82                                               fft_size=options.fft_size,
  83                                               sample_rate=input_rate,
  84                                               ref_scale=options.ref_scale,
  85                                               ref_level=20.0,
  86                                               y_divs = 12,
  87                                               avg_alpha=options.avg_alpha)
  88
  89         self.connect(self.u, self.scope)
  90
  91         self._build_gui(vbox)
  92         self._setup_events()
  93
  94         # set initial values
  95
  96         if options.gain is None:
  97             # if no gain was specified, use the mid-point in dB
  98             g = self.u.gain_range()
  99             options.gain = float(g[0]+g[1])/2
 100
 101         if options.freq is None:
 102             # if no freq was specified, use the mid-point
 103             r = self.u.freq_range()
 104             options.freq = float(r[0]+r[1])/2
 105
 106         self.set_gain(options.gain)
 107
 108         #if options.antenna is not None:
 109         #    print "Selecting antenna %s" % (options.antenna,)
 110         #    self.subdev.select_rx_antenna(options.antenna)
 111
 112         if self.show_debug_info:
 113             self.myform['decim'].set_value(self.u.decim())
 114             self.myform['fs@gbe'].set_value(input_rate)
 115             self.myform['dbname'].set_value("0x%04X" % (self.u.daughterboard_id(),)) # FIXME: add text name
 116             self.myform['baseband'].set_value(0)
 117             self.myform['ddc'].set_value(0)
 118
 119         if not(self.set_freq(options.freq)):
 120             self._set_status_msg("Failed to set initial frequency")
 121
 122     def _set_status_msg(self, msg):
 123         self.frame.GetStatusBar().SetStatusText(msg, 0)
 124
 125     def _build_gui(self, vbox):
 126
 127         def _form_set_freq(kv):
 128             return self.set_freq(kv['freq'])
 129
 130         vbox.Add(self.scope.win, 10, wx.EXPAND)
 131
 132         # add control area at the bottom
 133         self.myform = myform = form.form()
 134         hbox = wx.BoxSizer(wx.HORIZONTAL)
 135         hbox.Add((5,0), 0, 0)
 136         myform['freq'] = form.float_field(
 137             parent=self.panel, sizer=hbox, label="Center freq", weight=1,
 138             callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
 139
 140         hbox.Add((5,0), 0, 0)
 141         g = self.u.gain_range()
 142
 143         # some configurations don't have gain control
 144         if g[1] > g[0]:
 145             myform['gain'] = form.slider_field(parent=self.panel, sizer=hbox, label="Gain",
 146                                            weight=3,
 147                                            min=int(g[0]), max=int(g[1]),
 148                                            callback=self.set_gain)
 149
 150         hbox.Add((5,0), 0, 0)
 151         vbox.Add(hbox, 0, wx.EXPAND)
 152
 153         self._build_subpanel(vbox)
 154
 155     def _build_subpanel(self, vbox_arg):
 156         # build a secondary information panel (sometimes hidden)
 157
 158         # FIXME figure out how to have this be a subpanel that is always
 159         # created, but has its visibility controlled by foo.Show(True/False)
 160
 161         def _form_set_decim(kv):
 162             return self.set_decim(kv['decim'])
 163
 164         if not(self.show_debug_info):
 165             return
 166
 167         panel = self.panel
 168         vbox = vbox_arg
 169         myform = self.myform
 170
 171         #panel = wx.Panel(self.panel, -1)
 172         #vbox = wx.BoxSizer(wx.VERTICAL)
 173
 174         hbox = wx.BoxSizer(wx.HORIZONTAL)
 175         hbox.Add((5,0), 0)
 176
 177         myform['decim'] = form.int_field(
 178             parent=panel, sizer=hbox, label="Decim",
 179             callback=myform.check_input_and_call(_form_set_decim, self._set_status_msg))
 180
 181         hbox.Add((5,0), 1)
 182         myform['fs@gbe'] = form.static_float_field(
 183             parent=panel, sizer=hbox, label="Fs@GbE")
 184
 185         hbox.Add((5,0), 1)
 186         myform['dbname'] = form.static_text_field(
 187             parent=panel, sizer=hbox)
 188
 189         hbox.Add((5,0), 1)
 190         myform['baseband'] = form.static_float_field(
 191             parent=panel, sizer=hbox, label="Analog BB")
 192
 193         hbox.Add((5,0), 1)
 194         myform['ddc'] = form.static_float_field(
 195             parent=panel, sizer=hbox, label="DDC")
 196
 197         hbox.Add((5,0), 0)
 198         vbox.Add(hbox, 0, wx.EXPAND)
 199
 200
 201     def set_freq(self, target_freq):
 202         """
 203         Set the center frequency we're interested in.
 204
 205         @param target_freq: frequency in Hz
 206         @rypte: bool
 207
 208         Tuning is a two step process.  First we ask the front-end to
 209         tune as close to the desired frequency as it can.  Then we use
 210         the result of that operation and our target_frequency to
 211         determine the value for the digital down converter.
 212         """
 213         r = self.u.set_center_freq(target_freq)
 214
 215         if r:
 216             self.myform['freq'].set_value(target_freq)     # update displayed value
 217             if self.show_debug_info:
 218                 self.myform['baseband'].set_value(r.baseband_freq)
 219                 self.myform['ddc'].set_value(r.dxc_freq)
 220             if not self.options.oscilloscope:
 221                 self.scope.win.set_baseband_freq(target_freq)
 222             return True
 223
 224         return False
 225
 226     def set_gain(self, gain):
 227         if self.myform.has_key('gain'):
 228             self.myform['gain'].set_value(gain)     # update displayed value
 229         self.u.set_gain(gain)
 230
 231     def set_decim(self, decim):
 232         ok = self.u.set_decim(decim)
 233         if not ok:
 234             print "set_decim failed"
 235         input_rate = self.u.adc_rate() / self.u.decim()
 236         self.scope.set_sample_rate(input_rate)
 237         if self.show_debug_info:  # update displayed values
 238             self.myform['decim'].set_value(self.u.decim())
 239             self.myform['fs@gbe'].set_value(input_rate)
 240         return ok
 241
 242     def _setup_events(self):
 243         if not self.options.waterfall and not self.options.oscilloscope:
 244             self.scope.win.Bind(wx.EVT_LEFT_DCLICK, self.evt_left_dclick)
 245
 246     def evt_left_dclick(self, event):
 247         (ux, uy) = self.scope.win.GetXY(event)
 248         if event.CmdDown():
 249             # Re-center on maximum power
 250             points = self.scope.win._points
 251             if self.scope.win.peak_hold:
 252                 if self.scope.win.peak_vals is not None:
 253                     ind = numpy.argmax(self.scope.win.peak_vals)
 254                 else:
 255                     ind = int(points.shape()[0]/2)
 256             else:
 257                 ind = numpy.argmax(points[:,1])
 258             (freq, pwr) = points[ind]
 259             target_freq = freq/self.scope.win._scale_factor
 260             print ind, freq, pwr
 261             self.set_freq(target_freq)
 262         else:
 263             # Re-center on clicked frequency
 264             target_freq = ux/self.scope.win._scale_factor
 265             self.set_freq(target_freq)
 266
 267
 268 def main ():
 269     app = stdgui2.stdapp(app_top_block, "USRP2 FFT", nstatus=1)
 270     app.MainLoop()
 271
 272 if __name__ == '__main__':
 273     main ()