From 5d69a524f81f234b3fbc41d49ba18d6f6886baba Mon Sep 17 00:00:00 2001
From: jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Thu, 3 Aug 2006 04:51:51 +0000
Subject: Houston, we have a trunk.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5
---
gnuradio-examples/python/usrp/usrp_siggen.py | 180 +++++++++++++++++++++++++++
1 file changed, 180 insertions(+)
create mode 100755 gnuradio-examples/python/usrp/usrp_siggen.py
(limited to 'gnuradio-examples/python/usrp/usrp_siggen.py')
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 ()
--
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