3 from gnuradio import gr, eng_notation
4 from gnuradio import usrp
5 from gnuradio import audio
6 from gnuradio.eng_option import eng_option
7 from optparse import OptionParser
10 def build_graph (cordic_freq):
15 audio_file = "/home/eb/demo/testing-audio.dat"
19 src = gr.file_source (gr.sizeof_float, audio_file, True)
20 gain = gr.multiply_const_ff (10000)
22 interp = gr.interp_fir_filter_fff (sw_interp, (1, 1, 1, 1))
24 f2c = gr.float_to_complex ()
26 u = usrp.sink_c (0, usrp_interp)
27 u.set_tx_freq (0, cordic_freq)
29 fg.connect (src, gain)
30 fg.connect (gain, interp)
31 fg.connect (interp, (f2c, 0))
32 fg.connect (interp, (f2c, 1))
38 parser = OptionParser (option_class=eng_option)
39 parser.add_option ("-c", "--cordic-freq", type="eng_float", default=10e6,
40 help="set Tx cordic frequency to FREQ", metavar="FREQ")
41 (options, args) = parser.parse_args ()
43 print "cordic_freq = %s" % (eng_notation.num_to_str (options.cordic_freq))
44 fg = build_graph (options.cordic_freq)
47 raw_input ('Press Enter to quit: ')
50 if __name__ == '__main__':