#!/usr/bin/env python # # Copyright 2004,2005,2007,2008,2010 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 from gnuradio import eng_notation from gnuradio.eng_option import eng_option from gnuradio.wxgui import stdgui2, fftsink2, waterfallsink2, scopesink2, form, slider from optparse import OptionParser import wx import sys import numpy 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("-d", "--decim", type="int", default=16, help="set fgpa decimation rate to DECIM [default=%default]") parser.add_option("-f", "--freq", type="eng_float", default=None, help="set frequency to FREQ", metavar="FREQ") 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") (options, args) = parser.parse_args() if len(args) != 0: parser.print_help() sys.exit(1) self.options = options self.options.gain = 1.0 self.show_debug_info = True input_rate = 100e6 / options.decim self.src = gr.file_descriptor_source(gr.sizeof_short, 0, False); self.s2c = gr.interleaved_short_to_complex() if options.waterfall: self.scope = \ waterfallsink2.waterfall_sink_c (panel, fft_size=1024, sample_rate=input_rate) elif options.oscilloscope: self.scope = scopesink2.scope_sink_c(panel, sample_rate=input_rate) else: self.scope = fftsink2.fft_sink_c (panel, fft_size=1024, y_divs=12, sample_rate=input_rate,ref_level=110,fft_rate=20) self.connect(self.src, self.s2c, self.scope) self._build_gui(vbox) self._setup_events() # set initial values if options.freq is None: # if no freq was specified, use the mid-point options.freq = 0.0 if self.show_debug_info: self.myform['decim'].set_value(self.options.decim) 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) 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_decim(kv): return self.set_decim(kv['decim']) if not(self.show_debug_info): return panel = self.panel vbox = vbox_arg myform = self.myform #panel = wx.Panel(self.panel, -1) #vbox = wx.BoxSizer(wx.VERTICAL) hbox = wx.BoxSizer(wx.HORIZONTAL) hbox.Add((5,0), 0) myform['decim'] = form.int_field( parent=panel, sizer=hbox, label="Decim", callback=myform.check_input_and_call(_form_set_decim, self._set_status_msg)) 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 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. """ if True: self.myform['freq'].set_value(target_freq) # update displayed value if not self.options.waterfall and not self.options.oscilloscope: self.scope.set_baseband_freq(target_freq) return True return False def set_gain(self, gain): self.myform['gain'].set_value(gain) # update displayed value def set_decim(self, decim): input_rate = 100e6 / self.options.decim self.scope.set_sample_rate(input_rate) if self.show_debug_info: # update displayed values self.myform['decim'].set_value(self.u.decim_rate()) return ok 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, "USRP FFT", nstatus=1) app.MainLoop() if __name__ == '__main__': main ()