git.gag.com Git - debian/gnuradio/blob - gr-noaa/apps/hrpt_decode.py

   1 #!/usr/bin/env python
   2 ##################################################
   3 # Gnuradio Python Flow Graph
   4 # Title: Hrpt Decode
   5 # Generated: Sun Nov  8 10:49:01 2009
   6 ##################################################
   7
   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
  14 import math, os
  15
  16 class hrpt_decode(gr.top_block):
  17
  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")
  20
  21                 ##################################################
  22                 # Parameters
  23                 ##################################################
  24                 self.decim = decim
  25                 self.pll_alpha = pll_alpha
  26                 self.clock_alpha = clock_alpha
  27                 self.input_filename = input_filename
  28
  29                 ##################################################
  30                 # Variables
  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)
  38
  39                 ##################################################
  40                 # Blocks
  41                 ##################################################
  42                 self.decoder = noaa.hrpt_decoder(True,True)
  43                 self.file_source = gr.file_source(gr.sizeof_short*1, input_filename, False)
  44
  45                 ##################################################
  46                 # Connections
  47                 ##################################################
  48                 self.connect((self.file_source, 0), (self.decoder, 0))
  49
  50         def set_decim(self, decim):
  51                 self.decim = decim
  52                 self.set_sample_rate(64e6/self.decim)
  53
  54         def set_pll_alpha(self, pll_alpha):
  55                 self.pll_alpha = pll_alpha
  56
  57         def set_clock_alpha(self, clock_alpha):
  58                 self.clock_alpha = clock_alpha
  59
  60         def set_input_filename(self, input_filename):
  61                 self.input_filename = input_filename
  62
  63         def set_sym_rate(self, sym_rate):
  64                 self.sym_rate = sym_rate
  65                 self.set_sps(self.sample_rate/self.sym_rate)
  66
  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)
  71
  72         def set_sps(self, sps):
  73                 self.sps = sps
  74                 self.set_hs(int(self.sps/2.0))
  75
  76         def set_max_clock_offset(self, max_clock_offset):
  77                 self.max_clock_offset = max_clock_offset
  78
  79         def set_max_carrier_offset(self, max_carrier_offset):
  80                 self.max_carrier_offset = max_carrier_offset
  81
  82         def set_hs(self, hs):
  83                 self.hs = hs
  84
  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)
  97         tb.run()
  98