From 28e086141aead2e43f958f0ae14d58cac557fa2d Mon Sep 17 00:00:00 2001
From: trondeau <trondeau@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Wed, 7 Mar 2007 04:31:19 +0000
Subject: merged trondeau/digital-wip2 r4193:4730 into trunk - improves digital
receiver and fixes ticket:72
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4731 221aa14e-8319-0410-a670-987f0aec2ac5
---
gnuradio-examples/python/hier/usrp/usrp_siggen.py | 145 ++++++++++++++++++++++
1 file changed, 145 insertions(+)
create mode 100755 gnuradio-examples/python/hier/usrp/usrp_siggen.py
(limited to 'gnuradio-examples/python/hier/usrp/usrp_siggen.py')
diff --git a/gnuradio-examples/python/hier/usrp/usrp_siggen.py b/gnuradio-examples/python/hier/usrp/usrp_siggen.py
new file mode 100755
index 0000000000..28f80a822a
--- /dev/null
+++ b/gnuradio-examples/python/hier/usrp/usrp_siggen.py
@@ -0,0 +1,145 @@
+#!/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.hier_block2):
+ def __init__ (self, type, ampl, wfreq, offset, subdev_spec, interp, rf_freq):
+ # Call hierarchical block constructor
+ # Top-level blocks have no inputs or outputs
+ gr.hier_block2.__init__(self,
+ "usrp_siggen", # Block type
+ gr.io_signature(0,0,0), # Input signature
+ gr.io_signature(0,0,0)) # Output signature
+
+ # controllable values
+ self.interp = interp
+ self.waveform_type = type
+ self.waveform_ampl = ampl
+ self.waveform_freq = wfreq
+ self.waveform_offset = offset
+
+ self.u = usrp.sink_c (0, self.interp)
+
+ # determine the daughterboard subdevice we're using
+ if subdev_spec is None:
+ ubdev_spec = usrp.pick_tx_subdevice(self.u)
+ m = usrp.determine_tx_mux_value(self.u, subdev_spec)
+ self.u.set_mux(m)
+ self.subdev = usrp.selected_subdev(self.u, subdev_spec)
+ self.subdev.set_gain(self.subdev.gain_range()[1]) # set max Tx gain
+ self.subdev.set_enable(True) # enable transmitter
+ print "Using TX d'board %s" % (self.subdev.side_and_name(),)
+
+ if not self.set_freq(rf_freq):
+ sys.stderr.write('Failed to set RF frequency\n')
+ raise SystemExit
+
+ self.define_component("usrp", self.u)
+
+ if type == gr.GR_SIN_WAVE or type == gr.GR_CONST_WAVE:
+ self.src = gr.sig_source_c (self.usb_freq (),
+ gr.GR_SIN_WAVE,
+ self.waveform_freq,
+ self.waveform_ampl,
+ self.waveform_offset)
+ self.define_component("src", self.src)
+
+ elif type == gr.GR_UNIFORM or type == gr.GR_GAUSSIAN:
+ self.src = gr.noise_source_c (gr.GR_UNIFORM,
+ self.waveform_ampl)
+ self.define_component("src", self.src)
+
+ else:
+ raise ValueError, type
+
+ # self.file_sink = gr.file_sink (gr.sizeof_gr_complex, "siggen.dat")
+ # self.define_component("file_sink", self.file_sink)
+
+ self.connect ("src", 0, "usrp", 0)
+
+
+ def usb_freq (self):
+ return self.u.dac_freq() / self.interp
+
+ def usb_throughput (self):
+ return self.usb_freq () * 4
+
+ 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 [default=%default]")
+
+ 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 [default=%default]")
+ parser.add_option ("-a", "--amplitude", type="eng_float", default=16e3,
+ help="set waveform amplitude to AMPLITUDE [default=%default]", metavar="AMPL")
+ parser.add_option ("-o", "--offset", type="eng_float", default=0,
+ help="set waveform offset to OFFSET [default=%default]")
+ (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
+
+ top_block = my_graph(options.type, options.amplitude, options.waveform_freq, options.offset,
+ options.tx_subdev_spec, options.interp, options.rf_freq)
+
+ runtime = gr.runtime(top_block)
+
+ try:
+ # Run forever
+ runtime.run()
+ except KeyboardInterrupt:
+ # Ctrl-C exits
+ pass
+
+if __name__ == '__main__':
+ main ()
--
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