include/ecrt.h
author Florian Pose <fp@igh-essen.com>
Fri, 16 Mar 2007 14:00:12 +0000
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child 697 6f658c2082fd
permissions -rw-r--r--
Dynamic creation of EoE handlers.
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/******************************************************************************
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 *
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 *  $Id$
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 *
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 *  Copyright (C) 2006  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
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 *  and/or modify it under the terms of the GNU General Public License
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 *  as published by the Free Software Foundation; either version 2 of the
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 *  License, or (at your option) any later version.
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 *
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 *  The IgH EtherCAT Master is distributed in the hope that it will be
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 *  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General 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
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 *  along 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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 *  The right to use EtherCAT Technology is granted and comes free of
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 *  charge under condition of compatibility of product made by
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 *  Licensee. People intending to distribute/sell products based on the
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 *  code, have to sign an agreement to guarantee that products using
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 *  software based on IgH EtherCAT master stay compatible with the actual
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 *  EtherCAT specification (which are released themselves as an open
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 *  standard) as the (only) precondition to have the right to use EtherCAT
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 *  Technology, IP and trade marks.
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 *
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 *****************************************************************************/
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/**
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   \file
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   EtherCAT realtime interface.
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*/
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/**
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   \defgroup RealtimeInterface EtherCAT realtime interface
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   EtherCAT interface for realtime modules.
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   This interface is designed for realtime modules that want to use EtherCAT.
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   There are functions to request a master, to map process data, to communicate
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   with slaves via CoE and to configure and activate the bus.
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*/
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/*****************************************************************************/
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#ifndef __ECRT_H__
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#define __ECRT_H__
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#include <asm/byteorder.h>
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#ifdef __KERNEL__
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#include <linux/types.h>
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#else
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#include <stdint.h>
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#endif
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/*****************************************************************************/
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#define ECRT_VER_MAJOR 1
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#define ECRT_VER_MINOR 3
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#define ECRT_VERSION(a,b) (((a) << 8) + (b))
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#define ECRT_VERSION_MAGIC ECRT_VERSION(ECRT_VER_MAJOR, ECRT_VER_MINOR)
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/*****************************************************************************/
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struct ec_master;
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typedef struct ec_master ec_master_t; /**< \see ec_master */
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struct ec_domain;
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typedef struct ec_domain ec_domain_t; /**< \see ec_domain */
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struct ec_slave;
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typedef struct ec_slave ec_slave_t; /**< \see ec_slave */
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/**
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 * Bus status.
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 */
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typedef enum {
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    EC_BUS_FAILURE = -1, /**< At least one slave with process data exchange
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                           is offline. */
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    EC_BUS_OK            /**< All slaves with process data exchange are
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                           online. */
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}
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ec_bus_status_t;
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/**
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 * Master status.
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 * This is used for the output parameter of ecrt_master_get_status().
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 */
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typedef struct {
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    ec_bus_status_t bus_status; /**< \see ec_bus_status_t */
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    unsigned int bus_tainted; /**< non-zero, if the bus topology is invalid */
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    unsigned int slaves_responding; /**< number of responging slaves */
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}
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ec_master_status_t;
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/**
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 * List entry for domain PDO registrations.
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 * This type is used as a parameter for the ecrt_domain_register_pdo_list()
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 * convenience function.
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 */
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typedef struct {
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    const char *slave_address; /**< slave address string
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                                 \see ec_master_parse_slave_address() */
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    uint32_t vendor_id; /**< vendor ID */
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    uint32_t product_code; /**< product code */
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    uint16_t pdo_entry_index; /**< PDO entry index */
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    uint8_t pdo_entry_subindex; /**< PDO entry subindex */
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    void **data_ptr; /**< address of the process data pointer */
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}
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ec_pdo_reg_t;
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/**
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 * Direction type for PDO mapping and range registration functions.
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 */
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typedef enum {
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    EC_DIR_OUTPUT, /**< values written by master */
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    EC_DIR_INPUT   /**< values read by master */
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}
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ec_direction_t;
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/******************************************************************************
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 *  Global functions
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 *****************************************************************************/
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ec_master_t *ecrt_request_master(unsigned int master_index);
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void ecrt_release_master(ec_master_t *master);
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unsigned int ecrt_version_magic(void);
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/******************************************************************************
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 *  Master methods
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 *****************************************************************************/
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void ecrt_master_callbacks(ec_master_t *master, int (*request_cb)(void *),
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                           void (*release_cb)(void *), void *cb_data);
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ec_domain_t *ecrt_master_create_domain(ec_master_t *master);
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ec_slave_t *ecrt_master_get_slave(const ec_master_t *, const char *,
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        uint32_t vendor_id, uint32_t product_code);
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int ecrt_master_activate(ec_master_t *master);
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void ecrt_master_send(ec_master_t *master);
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void ecrt_master_receive(ec_master_t *master);
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void ecrt_master_get_status(const ec_master_t *master, ec_master_status_t *);
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/******************************************************************************
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 *  Domain Methods
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 *****************************************************************************/
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int ecrt_domain_register_pdo(ec_domain_t *domain, ec_slave_t *slave,
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        uint16_t pdo_index, uint8_t pdo_subindex, void **data_ptr);
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int ecrt_domain_register_pdo_range(ec_domain_t *domain, ec_slave_t *slave,
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        ec_direction_t direction, uint16_t offset, uint16_t length,
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        void **data_ptr);
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int ecrt_domain_register_pdo_list(ec_domain_t *domain,
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        const ec_pdo_reg_t *pdos);
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void ecrt_domain_process(ec_domain_t *domain);
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void ecrt_domain_queue(ec_domain_t *domain);
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int ecrt_domain_state(const ec_domain_t *domain);
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/******************************************************************************
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 *  Slave Methods
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 *****************************************************************************/
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int ecrt_slave_conf_sdo8(ec_slave_t *slave, uint16_t sdo_index,
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                         uint8_t sdo_subindex, uint8_t value);
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int ecrt_slave_conf_sdo16(ec_slave_t *slave, uint16_t sdo_index,
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                          uint8_t sdo_subindex, uint16_t value);
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int ecrt_slave_conf_sdo32(ec_slave_t *slave, uint16_t sdo_index,
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                          uint8_t sdo_subindex, uint32_t value);
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void ecrt_slave_pdo_mapping_clear(ec_slave_t *, ec_direction_t);
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int ecrt_slave_pdo_mapping_add(ec_slave_t *, ec_direction_t, uint16_t);
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int ecrt_slave_pdo_mapping(ec_slave_t *, ec_direction_t, unsigned int, ...);
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/******************************************************************************
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 *  Bitwise read/write macros
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 *****************************************************************************/
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/**
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 * Read a certain bit of an EtherCAT data byte.
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 * \param DATA EtherCAT data pointer
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 * \param POS bit position
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 */
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#define EC_READ_BIT(DATA, POS) ((*((uint8_t *) (DATA)) >> (POS)) & 0x01)
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/**
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 * Write a certain bit of an EtherCAT data byte.
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 * \param DATA EtherCAT data pointer
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 * \param POS bit position
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 * \param VAL new bit value
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 */
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#define EC_WRITE_BIT(DATA, POS, VAL) \
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    do { \
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        if (VAL) *((uint8_t *) (DATA)) |=  (1 << (POS)); \
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        else     *((uint8_t *) (DATA)) &= ~(1 << (POS)); \
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    } while (0)
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/******************************************************************************
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 *  Read macros
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 *****************************************************************************/
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/**
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 * Read an 8-bit unsigned value from EtherCAT data.
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 * \return EtherCAT data value
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 */
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#define EC_READ_U8(DATA) \
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    ((uint8_t) *((uint8_t *) (DATA)))
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/**
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 * Read an 8-bit signed value from EtherCAT data.
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 * \param DATA EtherCAT data pointer
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 * \return EtherCAT data value
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 */
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#define EC_READ_S8(DATA) \
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     ((int8_t) *((uint8_t *) (DATA)))
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/**
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 * Read a 16-bit unsigned value from EtherCAT data.
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 * \param DATA EtherCAT data pointer
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 * \return EtherCAT data value
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 */
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#define EC_READ_U16(DATA) \
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     ((uint16_t) le16_to_cpup((void *) (DATA)))
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/**
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 * Read a 16-bit signed value from EtherCAT data.
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 * \param DATA EtherCAT data pointer
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 * \return EtherCAT data value
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 */
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#define EC_READ_S16(DATA) \
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     ((int16_t) le16_to_cpup((void *) (DATA)))
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/**
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 * Read a 32-bit unsigned value from EtherCAT data.
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 * \param DATA EtherCAT data pointer
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 * \return EtherCAT data value
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 */
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#define EC_READ_U32(DATA) \
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     ((uint32_t) le32_to_cpup((void *) (DATA)))
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/**
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 * Read a 32-bit signed value from EtherCAT data.
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 * \param DATA EtherCAT data pointer
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 * \return EtherCAT data value
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 */
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#define EC_READ_S32(DATA) \
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     ((int32_t) le32_to_cpup((void *) (DATA)))
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/******************************************************************************
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 *  Write macros
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 *****************************************************************************/
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/**
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 * Write an 8-bit unsigned value to EtherCAT data.
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 * \param DATA EtherCAT data pointer
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 * \param VAL new value
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 */
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#define EC_WRITE_U8(DATA, VAL) \
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    do { \
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        *((uint8_t *)(DATA)) = ((uint8_t) (VAL)); \
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    } while (0)
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/**
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 * Write an 8-bit signed value to EtherCAT data.
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 * \param DATA EtherCAT data pointer
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 * \param VAL new value
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 */
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#define EC_WRITE_S8(DATA, VAL) EC_WRITE_U8(DATA, VAL)
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/**
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 * Write a 16-bit unsigned value to EtherCAT data.
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 * \param DATA EtherCAT data pointer
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 * \param VAL new value
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 */
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#define EC_WRITE_U16(DATA, VAL) \
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    do { \
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        *((uint16_t *) (DATA)) = (uint16_t) (VAL); \
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        cpu_to_le16s(DATA); \
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    } while (0)
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/**
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 * Write a 16-bit signed value to EtherCAT data.
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 * \param DATA EtherCAT data pointer
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 * \param VAL new value
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 */
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#define EC_WRITE_S16(DATA, VAL) EC_WRITE_U16(DATA, VAL)
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/**
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 * Write a 32-bit unsigned value to EtherCAT data.
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 * \param DATA EtherCAT data pointer
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 * \param VAL new value
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 */
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#define EC_WRITE_U32(DATA, VAL) \
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    do { \
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        *((uint32_t *) (DATA)) = (uint32_t) (VAL); \
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        cpu_to_le16s(DATA); \
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    } while (0)
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/**
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 * Write a 32-bit signed value to EtherCAT data.
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 * \param DATA EtherCAT data pointer
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 * \param VAL new value
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 */
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#define EC_WRITE_S32(DATA, VAL) EC_WRITE_U32(DATA, VAL)
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/*****************************************************************************/
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#endif