3 from gnuradio import gr, gru
4 from gnuradio import usrp
5 from gnuradio.eng_option import eng_option
6 from gnuradio import eng_notation
7 from optparse import OptionParser
11 class my_top_block(gr.top_block):
13 gr.top_block.__init__(self)
17 self.waveform_type = gr.GR_SIN_WAVE
18 self.waveform_ampl = 16000
19 self.waveform_freq = 100.12345e3
20 self.waveform_offset = 0
21 self._instantiate_blocks ()
22 self.set_waveform_type (self.waveform_type)
25 return self.u.dac_freq() / self.interp
27 def usb_throughput (self):
28 return self.usb_freq () * 4
30 def set_waveform_type (self, type):
32 valid waveform types are: gr.GR_SIN_WAVE, gr.GR_CONST_WAVE,
33 gr.GR_UNIFORM and gr.GR_GAUSSIAN
35 self._configure_graph (type)
36 self.waveform_type = type
38 def set_waveform_ampl (self, ampl):
39 self.waveform_ampl = ampl
40 self.siggen.set_amplitude (ampl)
41 self.noisegen.set_amplitude (ampl)
43 def set_waveform_freq (self, freq):
44 self.waveform_freq = freq
45 self.siggen.set_frequency (freq)
47 def set_waveform_offset (self, offset):
48 self.waveform_offset = offset
49 self.siggen.set_offset (offset)
51 def set_interpolator (self, interp):
53 self.siggen.set_sampling_freq (self.usb_freq ())
54 self.u.set_interp_rate (interp)
56 def _instantiate_blocks (self):
58 self.u = usrp.sink_c (0, self.interp)
60 self.siggen = gr.sig_source_c (self.usb_freq (),
66 self.noisegen = gr.noise_source_c (gr.GR_UNIFORM,
69 # self.file_sink = gr.file_sink (gr.sizeof_gr_complex, "siggen.dat")
71 def _configure_graph (self, type):
74 self.disconnect_all ()
75 if type == gr.GR_SIN_WAVE or type == gr.GR_CONST_WAVE:
76 self.connect (self.siggen, self.u)
77 # self.connect (self.siggen, self.file_sink)
78 self.siggen.set_waveform (type)
79 self.src = self.siggen
80 elif type == gr.GR_UNIFORM or type == gr.GR_GAUSSIAN:
81 self.connect (self.noisegen, self.u)
82 self.noisegen.set_type (type)
83 self.src = self.noisegen
85 raise ValueError, type
89 def set_freq(self, target_freq):
91 Set the center frequency we're interested in.
93 @param target_freq: frequency in Hz
96 Tuning is a two step process. First we ask the front-end to
97 tune as close to the desired frequency as it can. Then we use
98 the result of that operation and our target_frequency to
99 determine the value for the digital up converter.
101 r = self.u.tune(self.subdev._which, self.subdev, target_freq)
103 #print "r.baseband_freq =", eng_notation.num_to_str(r.baseband_freq)
104 #print "r.dxc_freq =", eng_notation.num_to_str(r.dxc_freq)
105 #print "r.residual_freq =", eng_notation.num_to_str(r.residual_freq)
106 #print "r.inverted =", r.inverted
114 parser = OptionParser (option_class=eng_option)
115 parser.add_option ("-T", "--tx-subdev-spec", type="subdev", default=(0, 0),
116 help="select USRP Tx side A or B")
117 parser.add_option ("-f", "--rf-freq", type="eng_float", default=None,
118 help="set RF center frequency to FREQ")
119 parser.add_option ("-i", "--interp", type="int", default=64,
120 help="set fgpa interpolation rate to INTERP [default=%default]")
122 parser.add_option ("--sine", dest="type", action="store_const", const=gr.GR_SIN_WAVE,
123 help="generate a complex sinusoid [default]", default=gr.GR_SIN_WAVE)
124 parser.add_option ("--const", dest="type", action="store_const", const=gr.GR_CONST_WAVE,
125 help="generate a constant output")
126 parser.add_option ("--gaussian", dest="type", action="store_const", const=gr.GR_GAUSSIAN,
127 help="generate Gaussian random output")
128 parser.add_option ("--uniform", dest="type", action="store_const", const=gr.GR_UNIFORM,
129 help="generate Uniform random output")
131 parser.add_option ("-w", "--waveform-freq", type="eng_float", default=100e3,
132 help="set waveform frequency to FREQ [default=%default]")
133 parser.add_option ("-a", "--amplitude", type="eng_float", default=16e3,
134 help="set waveform amplitude to AMPLITUDE [default=%default]", metavar="AMPL")
135 parser.add_option ("-g", "--gain", type="eng_float", default=None,
136 help="set output gain to GAIN [default=%default]")
137 parser.add_option ("-o", "--offset", type="eng_float", default=0,
138 help="set waveform offset to OFFSET [default=%default]")
139 (options, args) = parser.parse_args ()
145 if options.rf_freq is None:
146 sys.stderr.write("usrp_siggen: must specify RF center frequency with -f RF_FREQ\n")
151 tb.set_interpolator (options.interp)
152 tb.set_waveform_type (options.type)
153 tb.set_waveform_freq (options.waveform_freq)
154 tb.set_waveform_ampl (options.amplitude)
155 tb.set_waveform_offset (options.offset)
157 # determine the daughterboard subdevice we're using
158 if options.tx_subdev_spec is None:
159 options.tx_subdev_spec = usrp.pick_tx_subdevice(tb.u)
161 m = usrp.determine_tx_mux_value(tb.u, options.tx_subdev_spec)
162 #print "mux = %#04x" % (m,)
164 tb.subdev = usrp.selected_subdev(tb.u, options.tx_subdev_spec)
165 print "Using TX d'board %s" % (tb.subdev.side_and_name(),)
167 if options.gain is None:
168 tb.subdev.set_gain(tb.subdev.gain_range()[1]) # set max Tx gain
170 tb.subdev.set_gain(options.gain) # set max Tx gain
172 if not tb.set_freq(options.rf_freq):
173 sys.stderr.write('Failed to set RF frequency\n')
176 tb.subdev.set_enable(True) # enable transmitter
180 except KeyboardInterrupt:
183 if __name__ == '__main__':