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#!/usr/bin/env python
##################################################
# Gnuradio Python Flow Graph
# Title: Hrpt Decode
# Generated: Sun Nov 8 10:49:01 2009
##################################################
from gnuradio import eng_notation
from gnuradio import gr
from gnuradio import noaa
from gnuradio.eng_option import eng_option
from gnuradio.gr import firdes
from optparse import OptionParser
import math, os
class hrpt_decode(gr.top_block):
def __init__(self, decim=32, pll_alpha=0.01, clock_alpha=0.01, input_filename="frames.hrpt"):
gr.top_block.__init__(self, "Hrpt Decode")
##################################################
# Parameters
##################################################
self.decim = decim
self.pll_alpha = pll_alpha
self.clock_alpha = clock_alpha
self.input_filename = input_filename
##################################################
# Variables
##################################################
self.sym_rate = sym_rate = 600*1109
self.sample_rate = sample_rate = 64e6/decim
self.sps = sps = sample_rate/sym_rate
self.max_clock_offset = max_clock_offset = 100e-6
self.max_carrier_offset = max_carrier_offset = 2*math.pi*100e3/sample_rate
self.hs = hs = int(sps/2.0)
##################################################
# Blocks
##################################################
self.decoder = noaa.hrpt_decoder(True,True)
self.file_source = gr.file_source(gr.sizeof_short*1, input_filename, False)
##################################################
# Connections
##################################################
self.connect((self.file_source, 0), (self.decoder, 0))
def set_decim(self, decim):
self.decim = decim
self.set_sample_rate(64e6/self.decim)
def set_pll_alpha(self, pll_alpha):
self.pll_alpha = pll_alpha
def set_clock_alpha(self, clock_alpha):
self.clock_alpha = clock_alpha
def set_input_filename(self, input_filename):
self.input_filename = input_filename
def set_sym_rate(self, sym_rate):
self.sym_rate = sym_rate
self.set_sps(self.sample_rate/self.sym_rate)
def set_sample_rate(self, sample_rate):
self.sample_rate = sample_rate
self.set_max_carrier_offset(2*math.pi*100e3/self.sample_rate)
self.set_sps(self.sample_rate/self.sym_rate)
def set_sps(self, sps):
self.sps = sps
self.set_hs(int(self.sps/2.0))
def set_max_clock_offset(self, max_clock_offset):
self.max_clock_offset = max_clock_offset
def set_max_carrier_offset(self, max_carrier_offset):
self.max_carrier_offset = max_carrier_offset
def set_hs(self, hs):
self.hs = hs
if __name__ == '__main__':
parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
parser.add_option("-d", "--decim", dest="decim", type="intx", default=32,
help="Set decim [default=%default]")
parser.add_option("-p", "--pll-alpha", dest="pll_alpha", type="eng_float", default=eng_notation.num_to_str(0.01),
help="Set pll_alpha [default=%default]")
parser.add_option("-s", "--clock-alpha", dest="clock_alpha", type="eng_float", default=eng_notation.num_to_str(0.01),
help="Set clock_alpha [default=%default]")
parser.add_option("-F", "--input-filename", dest="input_filename", type="string", default="frames.hrpt",
help="Set frames.hrpt [default=%default]")
(options, args) = parser.parse_args()
tb = hrpt_decode(decim=options.decim, pll_alpha=options.pll_alpha, clock_alpha=options.clock_alpha, input_filename=options.input_filename)
tb.run()
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