#!/usr/bin/env python # # Copyright 2004,2005,2006,2007 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. # # Based on usrp_fsk4_oscope.py - sound card coded added by KA1RBI ( ikj1234i at yahoo dot com ) # print "Loading revised usrp_oscope with additional options for scopesink..." from gnuradio import gr, gru, optfir from gnuradio import audio from gnuradio import eng_notation from gnuradio.eng_option import eng_option from gnuradio.wxgui import stdgui2, scopesink2, form, slider from optparse import OptionParser import wx import sys from gnuradio import fsk4 from math import pi import threading 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 self.offset = 0.0 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=1, 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("-p", "--protocol", type="int", default=0, help="set protocol: 0 = RDLAP 19.2kbps (default); 1 = APCO25") parser.add_option("-g", "--gain", type="eng_float", default=1, help="set gain multiplier") parser.add_option("-8", "--width-8", action="store_true", default=False, help="Enable 8-bit samples across USB") parser.add_option( "--no-hb", action="store_true", default=False, help="don't use halfband filter in usrp") parser.add_option("-C", "--basic-complex", action="store_true", default=False, help="Use both inputs of a basicRX or LFRX as a single Complex input channel") parser.add_option("-D", "--basic-dualchan", action="store_true", default=False, help="Use both inputs of a basicRX or LFRX as seperate Real input channels") parser.add_option("-n", "--frame-decim", type="int", default=1, help="set oscope frame decimation factor to n [default=1]") parser.add_option("-I", "--audio-input", type="string", default="", help="pcm input device name. E.g., hw:0,0 or /dev/dsp") parser.add_option("-s", "--sample-rate", type="int", default=48000, help="sound card input sample rate") parser.add_option("-v", "--v-scale", type="eng_float", default=1000, help="set oscope initial V/div to SCALE [default=%default]") parser.add_option("-t", "--t-scale", type="eng_float", default=49e-6, help="set oscope initial s/div to SCALE [default=50us]") (options, args) = parser.parse_args() if len(args) != 0: parser.print_help() sys.exit(1) self.show_debug_info = True # build the graph self.num_inputs=1 self.msgq = gr.msg_queue(2) # queue that holds a maximum of 2 messages if options.protocol == 0: # ---------- RD-LAP 19.2 kbps (9600 ksps), 25kHz channel, self.symbol_rate = 9600 # symbol rate; at 2 bits/symbol this corresponds to 19.2kbps self.channel_decimation = 1 # decimation (final rate should be at least several symbol rate) self.input_sample_rate = options.sample_rate / options.decim # for USRP: 64MHz / FPGA decimation rate self.protocol_processing = fsk4.rdlap_f(self.msgq, 0) # desired protocol processing block selected here self.channel_rate = self.input_sample_rate / self.channel_decimation # symbol shaping filter characteristics symbol_coeffs = gr.firdes.root_raised_cosine (1.0, # gain self.channel_rate , # sampling rate self.symbol_rate, # symbol rate 0.2, # width of trans. band 500) # filter type if options.protocol == 1: # ---------- APCO-25 C4FM Test Data self.symbol_rate = 4800 # symbol rate; at 2 bits/symbol this corresponds to 19.2kbps self.channel_decimation = 1 # decimation self.input_sample_rate = options.sample_rate / options.decim # for USRP: 64MHz / FPGA decimation rate self.protocol_processing = fsk4.apco25_f(self.msgq, 0) self.channel_rate = self.input_sample_rate / self.channel_decimation # symbol shaping filter symbol_coeffs = gr.firdes.root_raised_cosine (1.0, # gain self.channel_rate , # sampling rate self.symbol_rate, # symbol rate 0.2, # width of trans. band 500) # filter type # ----------------- End of setup block self.audio_input = audio.source(options.sample_rate, options.audio_input) self.audio_gain = gr.multiply_const_ff(options.gain) self.scope2 = scopesink2.scope_sink_f(panel, sample_rate=self.symbol_rate, frame_decim=1, v_scale=2, t_scale= 0.025, num_inputs=self.num_inputs) # also note: # this specifies the nominal frequency deviation for the 4-level fsk signal symbol_decim = 1 self.symbol_filter = gr.fir_filter_fff (symbol_decim, symbol_coeffs) # eventually specify: sample rate, symbol rate self.demod_fsk4 = fsk4.demod_ff(self.msgq, self.channel_rate , self.symbol_rate) #self.rdlap_processing = fsk4.rdlap_f(self.msgq, 0) self.connect(self.audio_input, self.audio_gain, self.symbol_filter, self.demod_fsk4, self.protocol_processing) self.connect(self.demod_fsk4, self.scope2) # --------------- End of most of the 4L-FSK hack & slash self._build_gui(vbox) # set initial values self.set_gain(options.gain) if self.show_debug_info: # self.myform['decim'].set_value(self.u.decim_rate()) self.myform['dbname'].set_value("alsa") self.myform['baseband'].set_value(0) self.myform['ddc'].set_value(0) if self.num_inputs==2: self.myform['baseband2'].set_value(0) self.myform['ddc2'].set_value(0) 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']) def _form_set_freq2(kv): return self.set_freq2(kv['freq2']) vbox.Add(self.scope2.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['gain'] = form.slider_field(parent=self.panel, sizer=hbox, label="Gain", weight=3, min=1, max=150, 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['fs@usb'] = form.static_float_field( parent=panel, sizer=hbox, label="Fs@USB") 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") if self.num_inputs==2: hbox.Add((1,0), 1) myform['baseband2'] = form.static_float_field( parent=panel, sizer=hbox, label="BB2") hbox.Add((1,0), 1) myform['ddc2'] = form.static_float_field( parent=panel, sizer=hbox, label="DDC2") hbox.Add((5,0), 0) vbox.Add(hbox, 0, wx.EXPAND) def set_gain(self, gain): self.myform['gain'].set_value(gain) # update displayed value self.audio_gain.set_k(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['fs@usb'].set_value(self.u.adc_freq() / self.u.decim_rate()) # return ok #----------------------------------------------------------------------- # Queue watcher. Dispatches measured delay to callback. #----------------------------------------------------------------------- class queue_watcher (threading.Thread): def __init__ (self, msgq, callback, **kwds): threading.Thread.__init__ (self, **kwds) self.setDaemon (1) self.msgq = msgq self.callback = callback self.keep_running = True self.start () def run (self): while (self.keep_running): msg = self.msgq.delete_head() # blocking read of message queue frequency_correction = msg.arg1() self.callback(frequency_correction) def main (): app = stdgui2.stdapp( app_top_block, "USRP O'scope + 4LFSK", nstatus=1 ) app.MainLoop() if __name__ == '__main__': main ()