rfdevice.h

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/*
 * atMETEO - An ATmega based weather station
 * Copyright (C) 2014-2015 Christian Fetzer
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#pragma once

#include "demodulator.h"
#include "bitdecoder.h"
#include "sensor.h"

namespace Sensors
{

enum class RfDeviceStatus : uint8_t {
    Complete = 0,

    Incomplete,

    InvalidData
};

template <typename TDemodulator,
          typename TBitDecoder,
          typename TSensor,
          uint16_t TBitLength = 0>
class RfDevice :
        private TDemodulator,
        private TBitDecoder,
        public TSensor
{
public:
    RfDeviceStatus addPulseWidth(uint16_t pulseWidth)
    {
        if (m_lastStatus == RfDeviceStatus::InvalidData)
            reset();

        m_lastStatus = internalAddPulseWidth(pulseWidth);
        return m_lastStatus;
    }

    void reset()
    {
        TDemodulator::reset();
        TBitDecoder::reset();
        TSensor::reset();
        m_bitLength = 0;
    }

private:
    RfDeviceStatus internalAddPulseWidth(uint16_t pulseWidth)
    {
        auto demodulatorStatus = TDemodulator::addPulseWidth(pulseWidth);
        if (demodulatorStatus == DemodulatorStatus::Incomplete) {
            return RfDeviceStatus::Incomplete;
        } else if (demodulatorStatus != DemodulatorStatus::Complete) {
            return RfDeviceStatus::InvalidData;
        }

        // Bit
        auto decoderStatus = TBitDecoder::addBit(TDemodulator::getData());
        if (decoderStatus == BitDecoderStatus::ParityError) {
            return RfDeviceStatus::InvalidData;
        }
        ++m_bitLength;
        if (m_bitLength != TBitLength &&
            decoderStatus != BitDecoderStatus::Complete) {
            return RfDeviceStatus::Incomplete;
        }

        // Byte
        auto sensorStatus = TSensor::addByte(TBitDecoder::getData());
        if (sensorStatus == SensorStatus::Incomplete) {
            return RfDeviceStatus::Incomplete;
        } else if (sensorStatus != SensorStatus::Complete) {
            return RfDeviceStatus::InvalidData;
        }

        return RfDeviceStatus::Complete;
    }

    uint16_t m_bitLength = 0;
    RfDeviceStatus m_lastStatus = RfDeviceStatus::Incomplete;
};
  // \addtogroup libsensors_rfdevice

}  // namespace Sensors