EventGhost/EventGhost

# -*- coding: utf-8 -*-
#
# This file is part of EventGhost.
# Copyright © 2005-2020 EventGhost Project <http://www.eventghost.net/>
#
# EventGhost is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 2 of the License, or (at your option)
# any later version.
#
# EventGhost is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along
# with EventGhost. If not, see <http://www.gnu.org/licenses/>.

# Local imports
from eg.Classes.IrDecoder import DecodeError, ManchesterCoding1

class Nrc17(ManchesterCoding1):
    """
    IR decoder for the Nokia NRC17 protocol.
    """
    def __init__(self, controller):
        ManchesterCoding1.__init__(self, controller, 500)

    def Decode(self, data):
        self.SetData(data)
        # Consume the pre-pulse bit
        self.GetSample()

        # Check the header pause
        for dummyCounter in range(5):
            if self.GetSample():
                raise DecodeError("pre-space too short %d" % dummyCounter)

        # Check the start bit
        if not self.GetBit():
            raise DecodeError("missing start bit")

        # Get the actual code bits
        code = self.GetBitsLsbFirst(16)
        if code == 0xFFFE:
            return ""
        return "NRC17_%0.4X" % code