2 ##################################################
3 # Gnuradio Python Flow Graph
5 # Generated: Sun Nov 8 10:49:01 2009
6 ##################################################
8 from gnuradio import eng_notation
9 from gnuradio import gr
10 from gnuradio import noaa
11 from gnuradio.eng_option import eng_option
12 from gnuradio.gr import firdes
13 from optparse import OptionParser
16 class hrpt_decode(gr.top_block):
18 def __init__(self, decim=32, pll_alpha=0.01, clock_alpha=0.01, input_filename="frames.hrpt"):
19 gr.top_block.__init__(self, "Hrpt Decode")
21 ##################################################
23 ##################################################
25 self.pll_alpha = pll_alpha
26 self.clock_alpha = clock_alpha
27 self.input_filename = input_filename
29 ##################################################
31 ##################################################
32 self.sym_rate = sym_rate = 600*1109
33 self.sample_rate = sample_rate = 64e6/decim
34 self.sps = sps = sample_rate/sym_rate
35 self.max_clock_offset = max_clock_offset = 100e-6
36 self.max_carrier_offset = max_carrier_offset = 2*math.pi*100e3/sample_rate
37 self.hs = hs = int(sps/2.0)
39 ##################################################
41 ##################################################
42 self.decoder = noaa.hrpt_decoder(True,True)
43 self.file_source = gr.file_source(gr.sizeof_short*1, input_filename, False)
45 ##################################################
47 ##################################################
48 self.connect((self.file_source, 0), (self.decoder, 0))
50 def set_decim(self, decim):
52 self.set_sample_rate(64e6/self.decim)
54 def set_pll_alpha(self, pll_alpha):
55 self.pll_alpha = pll_alpha
57 def set_clock_alpha(self, clock_alpha):
58 self.clock_alpha = clock_alpha
60 def set_input_filename(self, input_filename):
61 self.input_filename = input_filename
63 def set_sym_rate(self, sym_rate):
64 self.sym_rate = sym_rate
65 self.set_sps(self.sample_rate/self.sym_rate)
67 def set_sample_rate(self, sample_rate):
68 self.sample_rate = sample_rate
69 self.set_max_carrier_offset(2*math.pi*100e3/self.sample_rate)
70 self.set_sps(self.sample_rate/self.sym_rate)
72 def set_sps(self, sps):
74 self.set_hs(int(self.sps/2.0))
76 def set_max_clock_offset(self, max_clock_offset):
77 self.max_clock_offset = max_clock_offset
79 def set_max_carrier_offset(self, max_carrier_offset):
80 self.max_carrier_offset = max_carrier_offset
85 if __name__ == '__main__':
86 parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
87 parser.add_option("-d", "--decim", dest="decim", type="intx", default=32,
88 help="Set decim [default=%default]")
89 parser.add_option("-p", "--pll-alpha", dest="pll_alpha", type="eng_float", default=eng_notation.num_to_str(0.01),
90 help="Set pll_alpha [default=%default]")
91 parser.add_option("-s", "--clock-alpha", dest="clock_alpha", type="eng_float", default=eng_notation.num_to_str(0.01),
92 help="Set clock_alpha [default=%default]")
93 parser.add_option("-F", "--input-filename", dest="input_filename", type="string", default="frames.hrpt",
94 help="Set frames.hrpt [default=%default]")
95 (options, args) = parser.parse_args()
96 tb = hrpt_decode(decim=options.decim, pll_alpha=options.pll_alpha, clock_alpha=options.clock_alpha, input_filename=options.input_filename)