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_graph(gr.flow_graph):
13
gr.flow_graph.__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):
72
was_running = self.is_running ()
75
self.disconnect_all ()
76
if type == gr.GR_SIN_WAVE or type == gr.GR_CONST_WAVE:
77
self.connect (self.siggen, self.u)
78
# self.connect (self.siggen, self.file_sink)
79
self.siggen.set_waveform (type)
80
self.src = self.siggen
81
elif type == gr.GR_UNIFORM or type == gr.GR_GAUSSIAN:
82
self.connect (self.noisegen, self.u)
83
self.noisegen.set_type (type)
84
self.src = self.noisegen
86
raise ValueError, type
90
def set_freq(self, target_freq):
92
Set the center frequency we're interested in.
94
@param target_freq: frequency in Hz
97
Tuning is a two step process. First we ask the front-end to
98
tune as close to the desired frequency as it can. Then we use
99
the result of that operation and our target_frequency to
100
determine the value for the digital up converter.
102
r = self.u.tune(self.subdev._which, self.subdev, target_freq)
104
#print "r.baseband_freq =", eng_notation.num_to_str(r.baseband_freq)
105
#print "r.dxc_freq =", eng_notation.num_to_str(r.dxc_freq)
106
#print "r.residual_freq =", eng_notation.num_to_str(r.residual_freq)
107
#print "r.inverted =", r.inverted
115
parser = OptionParser (option_class=eng_option)
116
parser.add_option ("-T", "--tx-subdev-spec", type="subdev", default=(0, 0),
117
help="select USRP Tx side A or B")
118
parser.add_option ("-f", "--rf-freq", type="eng_float", default=None,
119
help="set RF center frequency to FREQ")
120
parser.add_option ("-i", "--interp", type="int", default=64,
121
help="set fgpa interpolation rate to INTERP [default=%default]")
123
parser.add_option ("--sine", dest="type", action="store_const", const=gr.GR_SIN_WAVE,
124
help="generate a complex sinusoid [default]", default=gr.GR_SIN_WAVE)
125
parser.add_option ("--const", dest="type", action="store_const", const=gr.GR_CONST_WAVE,
126
help="generate a constant output")
127
parser.add_option ("--gaussian", dest="type", action="store_const", const=gr.GR_GAUSSIAN,
128
help="generate Gaussian random output")
129
parser.add_option ("--uniform", dest="type", action="store_const", const=gr.GR_UNIFORM,
130
help="generate Uniform random output")
132
parser.add_option ("-w", "--waveform-freq", type="eng_float", default=100e3,
133
help="set waveform frequency to FREQ [default=%default]")
134
parser.add_option ("-a", "--amplitude", type="eng_float", default=16e3,
135
help="set waveform amplitude to AMPLITUDE [default=%default]", metavar="AMPL")
136
parser.add_option ("-o", "--offset", type="eng_float", default=0,
137
help="set waveform offset to OFFSET [default=%default]")
138
(options, args) = parser.parse_args ()
144
if options.rf_freq is None:
145
sys.stderr.write("usrp_siggen: must specify RF center frequency with -f RF_FREQ\n")
150
fg.set_interpolator (options.interp)
151
fg.set_waveform_type (options.type)
152
fg.set_waveform_freq (options.waveform_freq)
153
fg.set_waveform_ampl (options.amplitude)
154
fg.set_waveform_offset (options.offset)
156
# determine the daughterboard subdevice we're using
157
if options.tx_subdev_spec is None:
158
options.tx_subdev_spec = usrp.pick_tx_subdevice(fg.u)
160
m = usrp.determine_tx_mux_value(fg.u, options.tx_subdev_spec)
161
#print "mux = %#04x" % (m,)
163
fg.subdev = usrp.selected_subdev(fg.u, options.tx_subdev_spec)
164
print "Using TX d'board %s" % (fg.subdev.side_and_name(),)
166
fg.subdev.set_gain(fg.subdev.gain_range()[1]) # set max Tx gain
168
if not fg.set_freq(options.rf_freq):
169
sys.stderr.write('Failed to set RF frequency\n')
172
fg.subdev.set_enable(True) # enable transmitter
176
except KeyboardInterrupt:
179
if __name__ == '__main__':