diff options
Diffstat (limited to 'toplevel/mrfm/mrfm_fft.py')
| -rwxr-xr-x | toplevel/mrfm/mrfm_fft.py | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/toplevel/mrfm/mrfm_fft.py b/toplevel/mrfm/mrfm_fft.py new file mode 100755 index 000000000..343ab0197 --- /dev/null +++ b/toplevel/mrfm/mrfm_fft.py @@ -0,0 +1,319 @@ +#!/usr/bin/env python +# +# This is mrfm_fft_sos.py +# Modification of Matt's mrfm_fft.py that reads filter coefs from file +# +# 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 +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 +import mrfm + + +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) + +def read_ints(filename): + try: + f = open(filename) + ints = [ int(i) for i in f.read().split() ] + f.close() + return ints + except: + return [] + +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") + parser.add_option("-F", "--filename", default=None, + help="Name of file with filter coefficients") + parser.add_option("-C", "--cfilename", default=None, + help="Name of file with compensator coefficients") + parser.add_option("-B", "--bitstream", default="mrfm.rbf", + help="Name of FPGA Bitstream file (.rbf)") + parser.add_option("-n", "--frame-decim", type="int", default=20, + help="set oscope frame decimation factor to n [default=12]") + (options, args) = parser.parse_args() + if len(args) != 0: + parser.print_help() + sys.exit(1) + + self.show_debug_info = True + + # default filter coefs + b00 = b01 = 16384 + b10 = b20 = a10 = a20 = b11 = b21 = a11 = a21 = 0 + + ba = read_ints(options.filename) + if len(ba) >= 6: + b00 = ba[0]; b10 = ba[1]; b20 = ba[2]; a10 = ba[4]; a20 = ba[5] + if len(ba) >= 12: + b01 = ba[6]; b11 = ba[7]; b21 = ba[8]; a11 = ba[10]; a21=ba[11] + print b00, b10, b20, a10, a20, b01, b11, b21, a11, a21 + + # default compensator coefficients + c11 = c22 = 1 + c12 = c21 = cscale = 0 + + cs = read_ints(options.cfilename) + if len(cs) >= 5: + c11 = cs[0]; c12 = cs[1]; c21 = cs[2]; c22 = cs[3]; cscale = cs[4] + print c11, c12, c21, c22, cscale + + # build the graph + self.u = mrfm.source_c(options.bitstream) + + self.u.set_decim_rate(options.decim) + self.u.set_center_freq(options.freq) + + frac_bits = 14 + self.u.set_coeffs(frac_bits,b20,b10,b00,a20,a10,b21,b11,b01,a21,a11) + + self.u.set_compensator(c11,c12,c21,c22,cscale) + + 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() + input_rate = self.u.adc_freq() / options.decim + + # fft_rate = 15 + fft_rate = 5 + + self.deint = gr.deinterleave(gr.sizeof_gr_complex) + self.connect(self.u,self.deint) + + if options.waterfall: + self.scope1=waterfallsink.waterfall_sink_c (self, panel, fft_size=1024, sample_rate=input_rate, + fft_rate=fft_rate) + self.scope2=waterfallsink.waterfall_sink_c (self, panel, fft_size=1024, sample_rate=input_rate, + fft_rate=fft_rate) + + elif options.oscilloscope: + self.scope1 = scopesink.scope_sink_c(self, panel, sample_rate=input_rate,frame_decim=options.frame_decim) # added option JPJ 4/21/2006 + self.scope2 = scopesink.scope_sink_c(self, panel, sample_rate=input_rate,frame_decim=options.frame_decim) + + else: + self.scope1 = fftsink.fft_sink_c (self, panel, fft_size=1024, sample_rate=input_rate, + fft_rate=fft_rate) + self.scope2 = fftsink.fft_sink_c (self, panel, fft_size=1024, sample_rate=input_rate, + fft_rate=fft_rate) + + # Show I, I' on top scope panel, Q, Q' on bottom + #self.fin = gr.complex_to_float() + #self.fout = gr.complex_to_float() + + #self.connect((self.deint,0), self.fin) + #self.connect((self.deint,1), self.fout) + + #self.ii = gr.float_to_complex() + #self.qq = gr.float_to_complex() + + #self.connect((self.fin,0), (self.ii,0)) + #self.connect((self.fout,0), (self.ii,1)) + #self.connect((self.fin,1), (self.qq,0)) + #self.connect((self.fout,1), (self.qq,1)) + + #self.connect(self.ii, self.scope1) + #self.connect(self.qq, self.scope2) + + self.connect ((self.deint,0),self.scope1) + self.connect ((self.deint,1),self.scope2) + + 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 not(self.set_freq(options.freq)): + self._set_status_msg("Failed to set initial frequency") + + if self.show_debug_info: + self.myform['decim'].set_value(self.u.decim_rate()) + self.myform['fs@usb'].set_value(self.u.adc_freq() / self.u.decim_rate()) + self.myform['dbname'].set_value(self.subdev.name()) + + + 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.scope1.win, 10, wx.EXPAND) + 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['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) + + 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.static_float_field( + parent=panel, sizer=hbox, label="Decim") + + 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") + + 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 main (): + app = stdgui.stdapp(app_flow_graph, "USRP FFT", nstatus=1) + app.MainLoop() + +if __name__ == '__main__': + main () |