# -*- coding: utf-8 -*-
##################################################
# GNU Radio Python Flow Graph
# Title: LilacSat-1 decoder
# Author: Daniel Estevez
# Description: LilacSat-1 decoder
# Generated: Sun Aug 20 10:39:12 2017
##################################################

import os
import sys
sys.path.append(os.environ.get('GRC_HIER_PATH', os.path.expanduser('~/.grc_gnuradio')))

from gnuradio import blocks
from gnuradio import digital
from gnuradio import filter
from gnuradio import gr
from gnuradio.filter import firdes
from rms_agc import rms_agc  # grc-generated hier_block


class lilacsat1_ber_bpsk(gr.hier_block2):

    def __init__(self, bfo=12000, callsign='', ip='::', latitude=0, longitude=0, port=7355, recstart=''):
        gr.hier_block2.__init__(
            self, "LilacSat-1 decoder",
            gr.io_signature(1, 1, gr.sizeof_gr_complex*1),
            gr.io_signature(1, 1, gr.sizeof_char*1),
        )

        ##################################################
        # Parameters
        ##################################################
        self.bfo = bfo
        self.callsign = callsign
        self.ip = ip
        self.latitude = latitude
        self.longitude = longitude
        self.port = port
        self.recstart = recstart

        ##################################################
        # Variables
        ##################################################
        self.sps = sps = 5
        self.samp_per_sym = samp_per_sym = 5
        self.nfilts = nfilts = 16
        self.alpha = alpha = 0.35

        self.variable_constellation_0_0 = variable_constellation_0_0 = digital.constellation_calcdist(([-1, 1]), ([0, 1]), 2, 1).base()

        self.threshold = threshold = 3
        self.samp_rate = samp_rate = 48000
        self.rrc_taps_0 = rrc_taps_0 = firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(samp_per_sym), 0.35, 11*samp_per_sym*nfilts)
        self.rrc_taps = rrc_taps = firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), alpha, 11*sps*nfilts)
        self.nfilts_0 = nfilts_0 = 16

        ##################################################
        # Blocks
        ##################################################
        self.rms_agc_0 = rms_agc(
            alpha=1e-2,
            reference=0.5,
        )
        self.low_pass_filter_0_0 = filter.fir_filter_ccf(1, firdes.low_pass(
        	1, samp_rate, 10000, 1000, firdes.WIN_HAMMING, 6.76))
        self.low_pass_filter_0 = filter.fir_filter_ccf(1, firdes.low_pass(
        	1, samp_rate, 6000, 500, firdes.WIN_HAMMING, 6.76))
        self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps, 0.05, (rrc_taps), nfilts, nfilts/2, 0.01, 1)
        self.digital_fll_band_edge_cc_0 = digital.fll_band_edge_cc(sps, 0.350, 100, 0.01)
        self.digital_costas_loop_cc_0_0 = digital.costas_loop_cc(0.1, 2, False)
        self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
        self.blocks_complex_to_real_0 = blocks.complex_to_real(1)

        ##################################################
        # Connections
        ##################################################
        self.connect((self.blocks_complex_to_real_0, 0), (self.digital_binary_slicer_fb_0, 0))
        self.connect((self.digital_binary_slicer_fb_0, 0), (self, 0))
        self.connect((self.digital_costas_loop_cc_0_0, 0), (self.blocks_complex_to_real_0, 0))
        self.connect((self.digital_fll_band_edge_cc_0, 0), (self.low_pass_filter_0, 0))
        self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.digital_costas_loop_cc_0_0, 0))
        self.connect((self, 0), (self.low_pass_filter_0_0, 0))
        self.connect((self.low_pass_filter_0, 0), (self.digital_pfb_clock_sync_xxx_0, 0))
        self.connect((self.low_pass_filter_0_0, 0), (self.rms_agc_0, 0))
        self.connect((self.rms_agc_0, 0), (self.digital_fll_band_edge_cc_0, 0))

    def get_bfo(self):
        return self.bfo

    def set_bfo(self, bfo):
        self.bfo = bfo

    def get_callsign(self):
        return self.callsign

    def set_callsign(self, callsign):
        self.callsign = callsign

    def get_ip(self):
        return self.ip

    def set_ip(self, ip):
        self.ip = ip

    def get_latitude(self):
        return self.latitude

    def set_latitude(self, latitude):
        self.latitude = latitude

    def get_longitude(self):
        return self.longitude

    def set_longitude(self, longitude):
        self.longitude = longitude

    def get_port(self):
        return self.port

    def set_port(self, port):
        self.port = port

    def get_recstart(self):
        return self.recstart

    def set_recstart(self, recstart):
        self.recstart = recstart

    def get_sps(self):
        return self.sps

    def set_sps(self, sps):
        self.sps = sps
        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.alpha, 11*self.sps*self.nfilts))

    def get_samp_per_sym(self):
        return self.samp_per_sym

    def set_samp_per_sym(self, samp_per_sym):
        self.samp_per_sym = samp_per_sym
        self.set_rrc_taps_0(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.samp_per_sym), 0.35, 11*self.samp_per_sym*self.nfilts))

    def get_nfilts(self):
        return self.nfilts

    def set_nfilts(self, nfilts):
        self.nfilts = nfilts
        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.alpha, 11*self.sps*self.nfilts))
        self.set_rrc_taps_0(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.samp_per_sym), 0.35, 11*self.samp_per_sym*self.nfilts))

    def get_alpha(self):
        return self.alpha

    def set_alpha(self, alpha):
        self.alpha = alpha
        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.alpha, 11*self.sps*self.nfilts))

    def get_variable_constellation_0_0(self):
        return self.variable_constellation_0_0

    def set_variable_constellation_0_0(self, variable_constellation_0_0):
        self.variable_constellation_0_0 = variable_constellation_0_0

    def get_threshold(self):
        return self.threshold

    def set_threshold(self, threshold):
        self.threshold = threshold

    def get_samp_rate(self):
        return self.samp_rate

    def set_samp_rate(self, samp_rate):
        self.samp_rate = samp_rate
        self.low_pass_filter_0_0.set_taps(firdes.low_pass(1, self.samp_rate, 10000, 1000, firdes.WIN_HAMMING, 6.76))
        self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, 6000, 500, firdes.WIN_HAMMING, 6.76))

    def get_rrc_taps_0(self):
        return self.rrc_taps_0

    def set_rrc_taps_0(self, rrc_taps_0):
        self.rrc_taps_0 = rrc_taps_0

    def get_rrc_taps(self):
        return self.rrc_taps

    def set_rrc_taps(self, rrc_taps):
        self.rrc_taps = rrc_taps
        self.digital_pfb_clock_sync_xxx_0.update_taps((self.rrc_taps))

    def get_nfilts_0(self):
        return self.nfilts_0

    def set_nfilts_0(self, nfilts_0):
        self.nfilts_0 = nfilts_0
