IEEE_802_15_4_NL.h

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/*******************************************************************************
 *
 * Copyright (c) 2008-2010
 * Michael Schulze <mschulze@ivs.cs.uni-magdeburg.de>
 * Thomas Kiebel <kiebel@ivs.cs.uni-magdeburg.de>
 * All rights reserved.
 *
 *    Redistribution and use in source and binary forms, with or without
 *    modification, are permitted provided that the following conditions
 *    are met:
 *
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *    * Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in
 *      the documentation and/or other materials provided with the
 *      distribution.
 *
 *    * Neither the name of the copyright holders nor the names of
 *      contributors may be used to endorse or promote products derived
 *      from this software without specific prior written permission.
 *
 *
 *    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 *    IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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 * $Id$
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 ******************************************************************************/

#ifndef __IEEE_802_15_4_NL_h__
#define __IEEE_802_15_4_NL_h__

#include <stdio.h>

#include "mw/api/EventChannel.h"
#include "mw/common/NodeID.h"
#include "mw/common/Subject.h"
#include "mw/el/EventLayerCallBack.h"
#include "mw/nl/DistinctNL.h"
#include "mw/nl/Packet.h"
#include "mw/afp/Config.h"

#include "debug.h"

namespace famouso {
    namespace mw {
        namespace nl {

            template< class driver_t >
            class IEEE_802_15_4_NL : public DistinctNL {
                    driver_t driver;
                public:
                    typedef IEEE_802_15_4_NL type;
                    typedef famouso::mw::Subject SNN;
                    typedef Packet<SNN> Packet_t;
                    typedef typename driver_t::mob_t mob_t;

                    struct info {
                        enum {
                            payload  = 127 - sizeof( SNN )
                        };
                    };

                    typedef afp::Disable AFP_Config;

                protected:
                    struct message {
                        uint8_t size;
                        uint8_t data[info::payload];
                    } mbuffer;

                public:

                    IEEE_802_15_4_NL() {}
                    ~IEEE_802_15_4_NL() {}
                    void init() {
                        TRACE_FUNCTION;
                        driver.init();
                        driver.rx_Interrupt.template bind<type, &type::rx_interrupt>(this);
                    }

                    void bind(const Subject &s, SNN &snn) {
                        TRACE_FUNCTION;
                        snn = s;
                    }

                    void deliver(const Packet_t& p) {
                        TRACE_FUNCTION;
                        struct message buffer;

                        SNN *subject = reinterpret_cast<SNN*>( buffer.data );//TODO Problem mit kleinem subject
                        *subject     = p.snn;

                        buffer.size = 0;
                        while ( buffer.size != p.data_length ) {
                            buffer.data[sizeof( SNN ) + buffer.size] = p.data[buffer.size];
                            ++buffer.size;
                        }
                        buffer.size += sizeof( SNN );
                        driver.send(buffer.data, buffer.size);
                    }

                    void fetch(Packet_t& p) {
                        TRACE_FUNCTION;

                        p.snn         = *reinterpret_cast<SNN*>( mbuffer.data );
                        p.data        = mbuffer.data + sizeof( famouso::mw::Subject );
                        p.data_length = mbuffer.size - sizeof( famouso::mw::Subject );
                    }

                    void rx_interrupt(const mob_t& msg) {
                        TRACE_FUNCTION;
                        mbuffer.size = 0;
                        while ( mbuffer.size != msg.length) {
                            mbuffer.data[mbuffer.size] = msg.data[mbuffer.size];
                            mbuffer.size++;
                        }
                        famouso::mw::el::IncommingEventFromNL(this);
                    }

                    void tx_interrupt() {
                        TRACE_FUNCTION;
                    }

                    SNN lastPacketSNN() {
                        return *reinterpret_cast<SNN*>( mbuffer.data );
                    }
            };
        } // namespace nl
    } // namespace mw
} //namespace famouso

#endif /*__IEEE_802_15_4_NL_h__*/