#!/usr/bin/env python # # Copyright 2004,2005 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 2, 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., 59 Temple Place - Suite 330, # Boston, MA 02111-1307, USA. # from gnuradio import gr, gru, audio, window from gnuradio import usrp from gnuradio import eng_notation from gnuradio.eng_option import eng_option from gnuradio.wxgui import stdgui, fftsink, waterfallsink, scopesink, form, slider from optparse import OptionParser import wx import sys def pick_subdevice(u): """ The user didn't specify a subdevice on the command line. If there's a daughterboard on A, select A. If there's a daughterboard on B, select B. Otherwise, select A. """ if u.db[0][0].dbid() >= 0: # dbid is < 0 if there's no d'board or a problem return (0, 0) if u.db[1][0].dbid() >= 0: return (1, 0) return (0, 0) class app_flow_graph(stdgui.gui_flow_graph): def __init__(self, frame, panel, vbox, argv): stdgui.gui_flow_graph.__init__(self) self.frame = frame self.panel = panel parser = OptionParser(option_class=eng_option) parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None, help="select USRP Rx side A or B (default=first one with a daughterboard)") 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("-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("-8", "--width-8", action="store_true", default=False, help="Enable 8-bit samples across USB") 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.show_debug_info = True # build the graph self.u = usrp.source_c(decim_rate=options.decim) if options.rx_subdev_spec is None: options.rx_subdev_spec = pick_subdevice(self.u) self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec)) if options.width_8: width = 8 shift = 8 format = self.u.make_format(width, shift) print "format =", hex(format) r = self.u.set_format(format) print "set_format =", r # determine the daughterboard subdevice we're using self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec) input_rate = self.u.adc_freq() / self.u.decim_rate() if options.waterfall: self.scope = \ waterfallsink.waterfall_sink_c (self, panel, fft_size=1024, sample_rate=input_rate) elif options.oscilloscope: self.scope = scopesink.scope_sink_c(self, panel, sample_rate=input_rate) else: self.scope = fftsink.fft_sink_c (self, panel, fft_size=1024, sample_rate=input_rate) self.connect(self.u, self.scope) # Output the spectrum in audio range # 2000 = 64e6 / 32000 , ADC_rate / audio_rate d2 = 2000 / options.decim # larger fftsize increases noise fft1size = 64 s2p = gr.serial_to_parallel(gr.sizeof_gr_complex, fft1size) # mywindow = window.hamming(fft1size) mywindow = fft1size * [1] fft1 = gr.fft_vcc(fft1size,True,mywindow) decim2 = gr.keep_one_in_n(fft1size*gr.sizeof_gr_complex,d2) ifft1 = gr.fft_vcc(fft1size,False,mywindow) p2s = gr.parallel_to_serial(gr.sizeof_gr_complex, fft1size) scale = gr.multiply_const_cc(complex(.0005,0)) c2f = gr.complex_to_float() audio_out = audio.sink(32000) self.connect(self.u,s2p,fft1,decim2,ifft1,p2s,scale,c2f) self.connect((c2f,0),(audio_out,0)) self.connect((c2f,1),(audio_out,1)) self._build_gui(vbox) # set initial values if options.gain is None: # if no gain was specified, use the mid-point in dB g = self.subdev.gain_range() options.gain = float(g[0]+g[1])/2 if options.freq is None: # if no freq was specified, use the mid-point r = self.subdev.freq_range() options.freq = float(r[0]+r[1])/2 self.set_gain(options.gain) if self.show_debug_info: self.myform['decim'].set_value(self.u.decim_rate()) self.myform['address@hidden'].set_value(self.u.adc_freq() / self.u.decim_rate()) self.myform['dbname'].set_value(self.subdev.name()) self.myform['baseband'].set_value(0) self.myform['ddc'].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.subdev.gain_range() myform['gain'] = form.slider_field(parent=self.panel, sizer=hbox, label="Gain", weight=3, min=int(g[0]), max=int(g[1]), 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_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), 1) myform['address@hidden'] = form.static_float_field( parent=panel, sizer=hbox, label="address@hidden") hbox.Add((5,0), 1) myform['dbname'] = form.static_text_field( parent=panel, sizer=hbox) hbox.Add((5,0), 1) myform['baseband'] = form.static_float_field( parent=panel, sizer=hbox, label="Analog BB") hbox.Add((5,0), 1) myform['ddc'] = form.static_float_field( parent=panel, sizer=hbox, label="DDC") 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. """ r = self.u.tune(0, self.subdev, target_freq) if r: self.myform['freq'].set_value(target_freq) # update displayed value if self.show_debug_info: self.myform['baseband'].set_value(r.baseband_freq) self.myform['ddc'].set_value(r.dxc_freq) return True return False def set_gain(self, gain): self.myform['gain'].set_value(gain) # update displayed value self.subdev.set_gain(gain) def set_decim(self, decim): ok = self.u.set_decim_rate(decim) if not ok: print "set_decim failed" input_rate = self.u.adc_freq() / self.u.decim_rate() self.scope.set_sample_rate(input_rate) if self.show_debug_info: # update displayed values self.myform['decim'].set_value(self.u.decim_rate()) self.myform['address@hidden'].set_value(self.u.adc_freq() / self.u.decim_rate()) return ok def main (): app = stdgui.stdapp(app_flow_graph, "USRP FFT", nstatus=1) app.MainLoop() if __name__ == '__main__': main ()