diff options
| author | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2006-08-03 04:51:51 +0000 |
|---|---|---|
| committer | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2006-08-03 04:51:51 +0000 |
| commit | 5d69a524f81f234b3fbc41d49ba18d6f6886baba (patch) | |
| tree | b71312bf7f1e8d10fef0f3ac6f28784065e73e72 /gnuradio-examples/python/usrp/usrp_siggen.py | |
Houston, we have a trunk.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'gnuradio-examples/python/usrp/usrp_siggen.py')
| -rwxr-xr-x | gnuradio-examples/python/usrp/usrp_siggen.py | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/gnuradio-examples/python/usrp/usrp_siggen.py b/gnuradio-examples/python/usrp/usrp_siggen.py new file mode 100755 index 0000000000..59e01e0a9b --- /dev/null +++ b/gnuradio-examples/python/usrp/usrp_siggen.py @@ -0,0 +1,180 @@ +#!/usr/bin/env python + +from gnuradio import gr, gru +from gnuradio import usrp +from gnuradio.eng_option import eng_option +from gnuradio import eng_notation +from optparse import OptionParser +import sys + + +class my_graph(gr.flow_graph): + def __init__ (self): + gr.flow_graph.__init__(self) + + # controllable values + self.interp = 64 + self.waveform_type = gr.GR_SIN_WAVE + self.waveform_ampl = 16000 + self.waveform_freq = 100.12345e3 + self.waveform_offset = 0 + self._instantiate_blocks () + self.set_waveform_type (self.waveform_type) + + def usb_freq (self): + return self.u.dac_freq() / self.interp + + def usb_throughput (self): + return self.usb_freq () * 4 + + def set_waveform_type (self, type): + ''' + valid waveform types are: gr.GR_SIN_WAVE, gr.GR_CONST_WAVE, + gr.GR_UNIFORM and gr.GR_GAUSSIAN + ''' + self._configure_graph (type) + self.waveform_type = type + + def set_waveform_ampl (self, ampl): + self.waveform_ampl = ampl + self.siggen.set_amplitude (ampl) + self.noisegen.set_amplitude (ampl) + + def set_waveform_freq (self, freq): + self.waveform_freq = freq + self.siggen.set_frequency (freq) + + def set_waveform_offset (self, offset): + self.waveform_offset = offset + self.siggen.set_offset (offset) + + def set_interpolator (self, interp): + self.interp = interp + self.siggen.set_sampling_freq (self.usb_freq ()) + self.u.set_interp_rate (interp) + + def _instantiate_blocks (self): + self.src = None + self.u = usrp.sink_c (0, self.interp) + + self.siggen = gr.sig_source_c (self.usb_freq (), + gr.GR_SIN_WAVE, + self.waveform_freq, + self.waveform_ampl, + self.waveform_offset) + + self.noisegen = gr.noise_source_c (gr.GR_UNIFORM, + self.waveform_ampl) + + # self.file_sink = gr.file_sink (gr.sizeof_gr_complex, "siggen.dat") + + def _configure_graph (self, type): + was_running = self.is_running () + if was_running: + self.stop () + self.disconnect_all () + if type == gr.GR_SIN_WAVE or type == gr.GR_CONST_WAVE: + self.connect (self.siggen, self.u) + # self.connect (self.siggen, self.file_sink) + self.siggen.set_waveform (type) + self.src = self.siggen + elif type == gr.GR_UNIFORM or type == gr.GR_GAUSSIAN: + self.connect (self.noisegen, self.u) + self.noisegen.set_type (type) + self.src = self.noisegen + else: + raise ValueError, type + if was_running: + self.start () + + 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 up converter. + """ + r = self.u.tune(self.subdev._which, self.subdev, target_freq) + if r: + print "r.baseband_freq =", eng_notation.num_to_str(r.baseband_freq) + print "r.dxc_freq =", eng_notation.num_to_str(r.dxc_freq) + print "r.residual_freq =", eng_notation.num_to_str(r.residual_freq) + print "r.inverted =", r.inverted + return True + + return False + + + +def main (): + parser = OptionParser (option_class=eng_option) + parser.add_option ("-T", "--tx-subdev-spec", type="subdev", default=(0, 0), + help="select USRP Tx side A or B") + parser.add_option ("-f", "--rf-freq", type="eng_float", default=None, + help="set RF center frequency to FREQ") + parser.add_option ("-i", "--interp", type="int", default=64, + help="set fgpa interpolation rate to INTERP") + + parser.add_option ("--sine", dest="type", action="store_const", const=gr.GR_SIN_WAVE, + help="generate a complex sinusoid [default]", default=gr.GR_SIN_WAVE) + parser.add_option ("--const", dest="type", action="store_const", const=gr.GR_CONST_WAVE, + help="generate a constant output") + parser.add_option ("--gaussian", dest="type", action="store_const", const=gr.GR_GAUSSIAN, + help="generate Gaussian random output") + parser.add_option ("--uniform", dest="type", action="store_const", const=gr.GR_UNIFORM, + help="generate Uniform random output") + + parser.add_option ("-w", "--waveform-freq", type="eng_float", default=100e3, + help="set waveform frequency to FREQ") + parser.add_option ("-a", "--amplitude", type="eng_float", default=16e3, + help="set waveform amplitude to AMPLITUDE", metavar="AMPL") + parser.add_option ("-o", "--offset", type="eng_float", default=0, + help="set waveform offset to OFFSET") + (options, args) = parser.parse_args () + + if len(args) != 0: + parser.print_help() + raise SystemExit + + if options.rf_freq is None: + sys.stderr.write("usrp_siggen: must specify RF center frequency with -f RF_FREQ\n") + parser.print_help() + raise SystemExit + + fg = my_graph() + fg.set_interpolator (options.interp) + fg.set_waveform_type (options.type) + fg.set_waveform_freq (options.waveform_freq) + fg.set_waveform_ampl (options.amplitude) + fg.set_waveform_offset (options.offset) + + # determine the daughterboard subdevice we're using + if options.tx_subdev_spec is None: + options.tx_subdev_spec = usrp.pick_tx_subdevice(fg.u) + + m = usrp.determine_tx_mux_value(fg.u, options.tx_subdev_spec) + #print "mux = %#04x" % (m,) + fg.u.set_mux(m) + fg.subdev = usrp.selected_subdev(fg.u, options.tx_subdev_spec) + print "Using TX d'board %s" % (fg.subdev.side_and_name(),) + + fg.subdev.set_gain(fg.subdev.gain_range()[1]) # set max Tx gain + + if not fg.set_freq(options.rf_freq): + sys.stderr.write('Failed to set RF frequency\n') + raise SystemExit + + fg.subdev.set_enable(True) # enable transmitter + + try: + fg.run() + except KeyboardInterrupt: + pass + +if __name__ == '__main__': + main () |