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/******************************************************************************

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 *

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 *  $Id$

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 *

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 *  Copyright (C) 2006-2012  Florian Pose, Ingenieurgemeinschaft IgH

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 *

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 *  This file is part of the IgH EtherCAT Master.

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 *

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 *  The IgH EtherCAT Master is free software; you can redistribute it and/or

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 *  modify it under the terms of the GNU General Public License version 2, as

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 *  published by the Free Software Foundation.

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 *

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 *  The IgH EtherCAT Master is distributed in the hope that it will be useful,

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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General

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 *  Public License for more details.

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 *

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 *  You should have received a copy of the GNU General Public License along

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 *  with the IgH EtherCAT Master; if not, write to the Free Software

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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

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 *

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 *  ---

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 *

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 *  The license mentioned above concerns the source code only. Using the

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 *  EtherCAT technology and brand is only permitted in compliance with the

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 *  industrial property and similar rights of Beckhoff Automation GmbH.

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 *

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 *****************************************************************************/

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/**

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   \file

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   EtherCAT datagram pair structure.

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*/

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/*****************************************************************************/

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#ifndef __EC_DATAGRAM_PAIR_H__

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#define __EC_DATAGRAM_PAIR_H__

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#include <linux/list.h>

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#include "globals.h"

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#include "datagram.h"

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/*****************************************************************************/

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/** Domain datagram pair.

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 */

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typedef struct {

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    struct list_head list; /**< List header. */

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    ec_domain_t *domain; /**< Parent domain. */

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    ec_datagram_t datagrams[EC_MAX_NUM_DEVICES]; /**< Datagrams.  */

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#if EC_MAX_NUM_DEVICES > 1

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    uint8_t *send_buffer;

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#endif

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    unsigned int expected_working_counter; /**< Expectord working conter. */

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} ec_datagram_pair_t;

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/*****************************************************************************/

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int ec_datagram_pair_init(ec_datagram_pair_t *, ec_domain_t *, uint32_t,

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        uint8_t *, size_t, const unsigned int []);

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void ec_datagram_pair_clear(ec_datagram_pair_t *);

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uint16_t ec_datagram_pair_process(ec_datagram_pair_t *, uint16_t[]);

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/*****************************************************************************/

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#endif