#!/usr/bin/env python # # Copyright 2011 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 from gnuradio import uhd from gnuradio import eng_notation from gnuradio.eng_option import eng_option from optparse import OptionParser import sys import numpy try: from gnuradio.wxgui import stdgui2, form, slider from gnuradio.wxgui import fftsink2, waterfallsink2, scopesink2 import wx except ImportError: sys.stderr.write("Error importing GNU Radio's wxgui. Please make sure gr-wxgui is installed.\n") sys.exit(1) class app_top_block(stdgui2.std_top_block): def __init__(self, frame, panel, vbox, argv): stdgui2.std_top_block.__init__(self, frame, panel, vbox, argv) self.frame = frame self.panel = panel parser = OptionParser(option_class=eng_option) parser.add_option("-a", "--args", type="string", default="", help="UHD device address args , [default=%default]") parser.add_option("", "--spec", type="string", default=None, help="Subdevice of UHD device where appropriate") parser.add_option("-A", "--antenna", type="string", default=None, help="select Rx Antenna where appropriate") parser.add_option("-s", "--samp-rate", type="eng_float", default=1e6, help="set sample rate (bandwidth) [default=%default]") parser.add_option("-f", "--freq", type="eng_float", default=None, help="set frequency to FREQ", metavar="FREQ") parser.add_option("-g", "--gain", type="eng_float", default=None, help="set gain in dB (default is midpoint)") parser.add_option("-W", "--waterfall", action="store_true", default=False, help="Enable waterfall display") parser.add_option("-S", "--oscilloscope", action="store_true", default=False, help="Enable oscilloscope display") parser.add_option("", "--avg-alpha", type="eng_float", default=1e-1, help="Set fftsink averaging factor, default=[%default]") parser.add_option("", "--ref-scale", type="eng_float", default=1.0, help="Set dBFS=0dB input value, default=[%default]") parser.add_option("--fft-size", type="int", default=1024, help="Set number of FFT bins [default=%default]") (options, args) = parser.parse_args() if len(args) != 0: parser.print_help() sys.exit(1) self.options = options self.show_debug_info = True self.u = uhd.usrp_source(device_addr=options.args, io_type=uhd.io_type.COMPLEX_FLOAT32, num_channels=1) self.u.set_samp_rate(options.samp_rate) input_rate = self.u.get_samp_rate() if options.waterfall: self.scope = \ waterfallsink2.waterfall_sink_c (panel, fft_size=1024, sample_rate=input_rate) self.frame.SetMinSize((800, 420)) elif options.oscilloscope: self.scope = scopesink2.scope_sink_c(panel, sample_rate=input_rate) self.frame.SetMinSize((800, 600)) else: self.scope = fftsink2.fft_sink_c (panel, fft_size=options.fft_size, sample_rate=input_rate, ref_scale=options.ref_scale, ref_level=20.0, y_divs = 12, avg_alpha=options.avg_alpha) self.frame.SetMinSize((800, 420)) self.connect(self.u, self.scope) self._build_gui(vbox) self._setup_events() # set initial values if options.gain is None: # if no gain was specified, use the mid-point in dB g = self.u.get_gain_range() options.gain = float(g.start()+g.stop())/2 if options.freq is None: # if no freq was specified, use the mid-point r = self.u.get_freq_range() options.freq = float(r.start()+r.stop())/2 self.set_gain(options.gain) # Set the subdevice spec if(options.spec): self.u.set_subdev_spec(options.spec, 0) # Set the antenna if(options.antenna): self.u.set_antenna(options.antenna, 0) if self.show_debug_info: self.myform['samprate'].set_value(self.u.get_samp_rate()) self.myform['rffreq'].set_value(0) self.myform['dspfreq'].set_value(0) if not(self.set_freq(options.freq)): self._set_status_msg("Failed to set initial frequency") def _set_status_msg(self, msg): self.frame.GetStatusBar().SetStatusText(msg, 0) def _build_gui(self, vbox): def _form_set_freq(kv): return self.set_freq(kv['freq']) vbox.Add(self.scope.win, 10, wx.EXPAND) # add control area at the bottom self.myform = myform = form.form() hbox = wx.BoxSizer(wx.HORIZONTAL) hbox.Add((5,0), 0, 0) myform['freq'] = form.float_field( parent=self.panel, sizer=hbox, label="Center freq", weight=1, callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg)) hbox.Add((5,0), 0, 0) g = self.u.get_gain_range() # some configurations don't have gain control if g.stop() > g.start(): myform['gain'] = form.slider_field(parent=self.panel, sizer=hbox, label="Gain", weight=3, min=int(g.start()), max=int(g.stop()), callback=self.set_gain) hbox.Add((5,0), 0, 0) vbox.Add(hbox, 0, wx.EXPAND) self._build_subpanel(vbox) def _build_subpanel(self, vbox_arg): # build a secondary information panel (sometimes hidden) # FIXME figure out how to have this be a subpanel that is always # created, but has its visibility controlled by foo.Show(True/False) def _form_set_samp_rate(kv): return self.set_samp_rate(kv['samprate']) if not(self.show_debug_info): return panel = self.panel vbox = vbox_arg myform = self.myform hbox = wx.BoxSizer(wx.HORIZONTAL) hbox.Add((5,0), 0) myform['samprate'] = form.float_field( parent=panel, sizer=hbox, label="Sample Rate", callback=myform.check_input_and_call(_form_set_samp_rate, self._set_status_msg)) hbox.Add((5,0), 1) myform['rffreq'] = form.static_float_field( parent=panel, sizer=hbox, label="RF Freq.") hbox.Add((5,0), 1) myform['dspfreq'] = form.static_float_field( parent=panel, sizer=hbox, label="DSP Freq.") hbox.Add((5,0), 0) vbox.Add(hbox, 0, wx.EXPAND) def set_freq(self, target_freq): """ Set the center frequency we're interested in. @param target_freq: frequency in Hz @rypte: bool """ r = self.u.set_center_freq(target_freq, 0) if r: self.myform['freq'].set_value(self.u.get_center_freq()) self.myform['rffreq'].set_value(r.actual_rf_freq) self.myform['dspfreq'].set_value(r.actual_dsp_freq) if not self.options.oscilloscope: self.scope.set_baseband_freq(target_freq) return True return False def set_gain(self, gain): if self.myform.has_key('gain'): self.myform['gain'].set_value(gain) # update displayed value self.u.set_gain(gain, 0) def set_samp_rate(self, samp_rate): ok = self.u.set_samp_rate(samp_rate) input_rate = self.u.get_samp_rate() self.scope.set_sample_rate(input_rate) if self.show_debug_info: # update displayed values self.myform['samprate'].set_value(self.u.get_samp_rate()) # uhd set_samp_rate never fails; always falls back to closest requested. return True def _setup_events(self): if not self.options.waterfall and not self.options.oscilloscope: self.scope.win.Bind(wx.EVT_LEFT_DCLICK, self.evt_left_dclick) def evt_left_dclick(self, event): (ux, uy) = self.scope.win.GetXY(event) if event.CmdDown(): # Re-center on maximum power points = self.scope.win._points if self.scope.win.peak_hold: if self.scope.win.peak_vals is not None: ind = numpy.argmax(self.scope.win.peak_vals) else: ind = int(points.shape()[0]/2) else: ind = numpy.argmax(points[:,1]) (freq, pwr) = points[ind] target_freq = freq/self.scope.win._scale_factor print ind, freq, pwr self.set_freq(target_freq) else: # Re-center on clicked frequency target_freq = ux/self.scope.win._scale_factor self.set_freq(target_freq) def main (): app = stdgui2.stdapp(app_top_block, "UHD FFT", nstatus=1) app.MainLoop() if __name__ == '__main__': main ()