canID.h

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/*******************************************************************************
 *
 * Copyright (c) 2008-2010 Michael Schulze <mschulze@ivs.cs.uni-magdeburg.de>
 * All rights reserved.
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 *      the documentation and/or other materials provided with the
 *      distribution.
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 *      from this software without specific prior written permission.
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 * $Id$
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#ifndef __canID_h__
#define __canID_h__

#include <stdint.h>

namespace famouso {
    namespace mw {
        namespace nl {
            namespace CAN {
                namespace detail {

                    template <typename IDStruct>
                    union __attribute__((packed)) ID {
                        uint32_t _value;
                        uint8_t  _v[4];
                        typename IDStruct::parts parts;
                        typename IDStruct::parts_ccp parts_ccp;

                        uint16_t etag() {
                            return parts._etag;
                        }

                        void etag(uint16_t e) {
                            parts._etag = e;
                        }

                        uint8_t tx_node() {
                            return parts._tx_nodelo | (parts._tx_nodehi << 2) ;
                        }

                        void tx_node(uint8_t t) {
                            parts._tx_nodelo = t & 0x3;
                            parts._tx_nodehi = t >> 2 ;
                        }

                        bool fragment() {
                            return parts._fragment;
                        }

                        void fragment(bool f) {
                            parts._fragment = f;
                        }

                        uint8_t prio() {
                            return parts._priolo | (parts._priohi << 2) ;
                        }

                        void prio(uint8_t p) {
                            parts._priolo = p & 0x7;
                            parts._priohi = p >> 2;
                        }

                        uint8_t ccp_stage() {
                            return parts_ccp._stage;
                        }

                        void ccp_stage(uint8_t stage) {
                            parts_ccp._stage = stage;
                        }

                        uint8_t ccp_nibble() {
                            return parts_ccp._nibblelo | (parts_ccp._nibblehi << 2) ;
                        }

                        void ccp_nibble(uint8_t nibble) {
                            parts_ccp._nibblelo = nibble;
                            parts_ccp._nibblehi = nibble >> 2;
                        }

                        uint8_t & operator[](uint8_t i) {
                            return _v[i];
                        }
                    };

                 } /* namespace detail */

            } /* namespace CAN */
        } /* namespace nl */
    } /* namespace mw */
} /* namespace famouso */

#endif