git.gag.com Git - debian/gnuradio/blob - gr-utils/src/python/usrp2_fft.py

   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         (options, args) = parser.parse_args()
  62         if len(args) != 0:
  63             parser.print_help()
  64             sys.exit(1)
  65         self.options = options
  66         self.show_debug_info = True
  67
  68         self.u = usrp2.source_32fc(options.interface, options.mac_addr)
  69         self.u.set_decim(options.decim)
  70
  71         #input_rate = self.u.adc_freq() / self.u.decim_rate()
  72         input_rate = 100e6/options.decim
  73
  74         if options.waterfall:
  75             self.scope = \
  76               waterfallsink2.waterfall_sink_c (panel, fft_size=1024, sample_rate=input_rate)
  77         elif options.oscilloscope:
  78             self.scope = scopesink2.scope_sink_c(panel, sample_rate=input_rate)
  79         else:
  80             self.scope = fftsink2.fft_sink_c (panel, fft_size=1024, sample_rate=input_rate,
  81                                               ref_scale=options.ref_scale, ref_level=0.0, y_divs = 10,
  82                                               avg_alpha=options.avg_alpha)
  83
  84         self.connect(self.u, self.scope)
  85
  86         self._build_gui(vbox)
  87         self._setup_events()
  88
  89         # set initial values
  90
  91         if options.gain is None:
  92             # if no gain was specified, use the mid-point in dB
  93             #g = self.subdev.gain_range()
  94             #options.gain = float(g[0]+g[1])/2
  95             options.gain = 0
  96
  97         if options.freq is None:
  98             # if no freq was specified, use the mid-point
  99             #r = self.subdev.freq_range()
 100             #options.freq = float(r[0]+r[1])/2
 101             options.freq = 0
 102
 103         self.set_gain(options.gain)
 104
 105         #if options.antenna is not None:
 106         #    print "Selecting antenna %s" % (options.antenna,)
 107         #    self.subdev.select_rx_antenna(options.antenna)
 108
 109         if self.show_debug_info:
 110             self.myform['decim'].set_value(options.decim)
 111             self.myform['fs@usb'].set_value(100e6/options.decim) #self.u.adc_freq() / self.u.decim_rate())
 112             #self.myform['dbname'].set_value(self.subdev.name())
 113             self.myform['baseband'].set_value(0)
 114             self.myform['ddc'].set_value(0)
 115
 116         if not(self.u.set_center_freq(options.freq)):
 117             self._set_status_msg("Failed to set initial frequency")
 118
 119     def _set_status_msg(self, msg):
 120         self.frame.GetStatusBar().SetStatusText(msg, 0)
 121
 122     def _build_gui(self, vbox):
 123
 124         def _form_set_freq(kv):
 125             return self.set_freq(kv['freq'])
 126
 127         vbox.Add(self.scope.win, 10, wx.EXPAND)
 128
 129         # add control area at the bottom
 130         self.myform = myform = form.form()
 131         hbox = wx.BoxSizer(wx.HORIZONTAL)
 132         hbox.Add((5,0), 0, 0)
 133         myform['freq'] = form.float_field(
 134             parent=self.panel, sizer=hbox, label="Center freq", weight=1,
 135             callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
 136
 137         hbox.Add((5,0), 0, 0)
 138         #g = self.subdev.gain_range()
 139         g = [0, 100, 1] #FIXME
 140         myform['gain'] = form.slider_field(parent=self.panel, sizer=hbox, label="Gain",
 141                                            weight=3,
 142                                            min=int(g[0]), max=int(g[1]),
 143                                            callback=self.set_gain)
 144
 145         hbox.Add((5,0), 0, 0)
 146         vbox.Add(hbox, 0, wx.EXPAND)
 147
 148         self._build_subpanel(vbox)
 149
 150     def _build_subpanel(self, vbox_arg):
 151         # build a secondary information panel (sometimes hidden)
 152
 153         # FIXME figure out how to have this be a subpanel that is always
 154         # created, but has its visibility controlled by foo.Show(True/False)
 155
 156         def _form_set_decim(kv):
 157             return self.set_decim(kv['decim'])
 158
 159         if not(self.show_debug_info):
 160             return
 161
 162         panel = self.panel
 163         vbox = vbox_arg
 164         myform = self.myform
 165
 166         #panel = wx.Panel(self.panel, -1)
 167         #vbox = wx.BoxSizer(wx.VERTICAL)
 168
 169         hbox = wx.BoxSizer(wx.HORIZONTAL)
 170         hbox.Add((5,0), 0)
 171
 172         myform['decim'] = form.int_field(
 173             parent=panel, sizer=hbox, label="Decim",
 174             callback=myform.check_input_and_call(_form_set_decim, self._set_status_msg))
 175
 176         hbox.Add((5,0), 1)
 177         myform['fs@usb'] = form.static_float_field(
 178             parent=panel, sizer=hbox, label="Fs@USB")
 179
 180         hbox.Add((5,0), 1)
 181         myform['dbname'] = form.static_text_field(
 182             parent=panel, sizer=hbox)
 183
 184         hbox.Add((5,0), 1)
 185         myform['baseband'] = form.static_float_field(
 186             parent=panel, sizer=hbox, label="Analog BB")
 187
 188         hbox.Add((5,0), 1)
 189         myform['ddc'] = form.static_float_field(
 190             parent=panel, sizer=hbox, label="DDC")
 191
 192         hbox.Add((5,0), 0)
 193         vbox.Add(hbox, 0, wx.EXPAND)
 194
 195
 196     def set_freq(self, target_freq):
 197         """
 198         Set the center frequency we're interested in.
 199
 200         @param target_freq: frequency in Hz
 201         @rypte: bool
 202
 203         Tuning is a two step process.  First we ask the front-end to
 204         tune as close to the desired frequency as it can.  Then we use
 205         the result of that operation and our target_frequency to
 206         determine the value for the digital down converter.
 207         """
 208         r = self.u.set_center_freq(target_freq)
 209
 210         if r:
 211             self.myform['freq'].set_value(target_freq)     # update displayed value
 212             if self.show_debug_info:
 213                 self.myform['baseband'].set_value(r.baseband_freq)
 214                 self.myform['ddc'].set_value(r.dxc_freq)
 215             if not self.options.oscilloscope:
 216                 self.scope.win.set_baseband_freq(target_freq)
 217             return True
 218
 219         return False
 220
 221     def set_gain(self, gain):
 222         self.myform['gain'].set_value(gain)     # update displayed value
 223         self.u.set_gain(gain)
 224
 225     def set_decim(self, decim):
 226         ok = self.u.set_decim(decim)
 227         if not ok:
 228             print "set_decim failed"
 229         #input_rate = self.u.adc_freq() / self.u.decim_rate()
 230         input_rate = 100e6/decim # FIXME
 231         self.scope.set_sample_rate(input_rate)
 232         if self.show_debug_info:  # update displayed values
 233             self.myform['decim'].set_value(decim) #self.u.decim_rate())
 234             self.myform['fs@usb'].set_value(input_rate) #self.u.adc_freq() / self.u.decim_rate())
 235         return ok
 236
 237     def _setup_events(self):
 238         if not self.options.waterfall and not self.options.oscilloscope:
 239             self.scope.win.Bind(wx.EVT_LEFT_DCLICK, self.evt_left_dclick)
 240
 241     def evt_left_dclick(self, event):
 242         (ux, uy) = self.scope.win.GetXY(event)
 243         if event.CmdDown():
 244             # Re-center on maximum power
 245             points = self.scope.win._points
 246             if self.scope.win.peak_hold:
 247                 if self.scope.win.peak_vals is not None:
 248                     ind = numpy.argmax(self.scope.win.peak_vals)
 249                 else:
 250                     ind = int(points.shape()[0]/2)
 251             else:
 252                 ind = numpy.argmax(points[:,1])
 253             (freq, pwr) = points[ind]
 254             target_freq = freq/self.scope.win._scale_factor
 255             print ind, freq, pwr
 256             self.set_freq(target_freq)
 257         else:
 258             # Re-center on clicked frequency
 259             target_freq = ux/self.scope.win._scale_factor
 260             self.set_freq(target_freq)
 261
 262
 263 def main ():
 264     app = stdgui2.stdapp(app_top_block, "USRP2 FFT", nstatus=1)
 265     app.MainLoop()
 266
 267 if __name__ == '__main__':
 268     main ()