drivers/ec_command.c
author Florian Pose <fp@igh-essen.com>
Fri, 06 Jan 2006 16:19:35 +0000
changeset 49 3f8e769ca747
parent 39 6965c23a6826
permissions -rw-r--r--
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/******************************************************************************
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 *
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 *  e c _ c o m m a n d . c
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 *
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 *  Methoden für ein EtherCAT-Kommando.
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 *
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 *  $Id$
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 *****************************************************************************/
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#include <linux/slab.h>
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#include "ec_command.h"
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/*****************************************************************************/
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/**
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   Kommando-Konstruktor.
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   Initialisiert alle Variablen innerhalb des Kommandos auf die
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   Default-Werte.
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   @param cmd Zeiger auf das zu initialisierende Kommando.
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*/
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void EtherCAT_command_init(EtherCAT_command_t *cmd)
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{
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  cmd->type = ECAT_CMD_NONE;
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  cmd->address.logical = 0x00000000;
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  cmd->data_length = 0;
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  cmd->state = ECAT_CS_READY;
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  cmd->index = 0;
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  cmd->working_counter = 0;
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}
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/*****************************************************************************/
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/**
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   Kommando-Destruktor.
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   Setzt alle Attribute auf den Anfangswert zurueck.
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   @param cmd Zeiger auf das zu initialisierende Kommando.
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*/
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void EtherCAT_command_clear(EtherCAT_command_t *cmd)
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{
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  EtherCAT_command_init(cmd);
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}
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/*****************************************************************************/
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#define ECAT_FUNC_HEADER \
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  EtherCAT_command_init(cmd)
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#define ECAT_FUNC_WRITE_FOOTER \
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  cmd->data_length = length; \
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  memcpy(cmd->data, data, length);
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#define ECAT_FUNC_READ_FOOTER \
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  cmd->data_length = length;
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/*****************************************************************************/
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/**
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   Initialisiert ein EtherCAT-NPRD-Kommando.
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   @param cmd Zeiger auf das Kommando
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   @param node_address Adresse des Knotens (Slaves)
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   @param offset Physikalische Speicheradresse im Slave
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   @param length Länge der zu lesenden Daten
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*/
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void EtherCAT_command_read(EtherCAT_command_t *cmd,
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                           unsigned short node_address,
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                           unsigned short offset,
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                           unsigned int length)
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{
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  if (unlikely(node_address == 0x0000))
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    printk(KERN_WARNING "EtherCAT: Warning - Using node address 0x0000!\n");
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  ECAT_FUNC_HEADER;
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  cmd->type = ECAT_CMD_NPRD;
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  cmd->address.phy.dev.node = node_address;
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  cmd->address.phy.mem = offset;
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  ECAT_FUNC_READ_FOOTER;
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}
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/*****************************************************************************/
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/**
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   Initialisiert ein EtherCAT-NPWR-Kommando.
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   Alloziert ein "node-adressed physical write"-Kommando
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   und fügt es in die Liste des Masters ein.
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   @param cmd Zeiger auf das Kommando
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   @param node_address Adresse des Knotens (Slaves)
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   @param offset Physikalische Speicheradresse im Slave
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   @param length Länge der zu schreibenden Daten
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   @param data Zeiger auf Speicher mit zu schreibenden Daten
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*/
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void EtherCAT_command_write(EtherCAT_command_t *cmd,
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                            unsigned short node_address,
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                            unsigned short offset,
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                            unsigned int length,
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                            const unsigned char *data)
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{
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  if (unlikely(node_address == 0x0000))
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    printk(KERN_WARNING "EtherCAT: Warning - Using node address 0x0000!\n");
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  ECAT_FUNC_HEADER;
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  cmd->type = ECAT_CMD_NPWR;
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  cmd->address.phy.dev.node = node_address;
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  cmd->address.phy.mem = offset;
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  ECAT_FUNC_WRITE_FOOTER;
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}
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/*****************************************************************************/
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/**
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   Initialisiert ein EtherCAT-APRD-Kommando.
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   Alloziert ein "autoincerement physical read"-Kommando
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   und fügt es in die Liste des Masters ein.
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   @param cmd Zeiger auf das Kommando
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   @param ring_position (Negative) Position des Slaves im Bus
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   @param offset Physikalische Speicheradresse im Slave
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   @param length Länge der zu lesenden Daten
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*/
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void EtherCAT_command_position_read(EtherCAT_command_t *cmd,
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                                    short ring_position,
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                                    unsigned short offset,
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                                    unsigned int length)
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{
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  ECAT_FUNC_HEADER;
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  cmd->type = ECAT_CMD_APRD;
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  cmd->address.phy.dev.pos = ring_position;
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  cmd->address.phy.mem = offset;
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  ECAT_FUNC_READ_FOOTER;
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}
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/*****************************************************************************/
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/**
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   Initialisiert ein EtherCAT-APWR-Kommando.
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   Alloziert ein "autoincrement physical write"-Kommando
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   und fügt es in die Liste des Masters ein.
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   @param cmd Zeiger auf das Kommando
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   @param ring_position (Negative) Position des Slaves im Bus
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   @param offset Physikalische Speicheradresse im Slave
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   @param length Länge der zu schreibenden Daten
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   @param data Zeiger auf Speicher mit zu schreibenden Daten
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*/
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void EtherCAT_command_position_write(EtherCAT_command_t *cmd,
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                                     short ring_position,
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                                     unsigned short offset,
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                                     unsigned int length,
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                                     const unsigned char *data)
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{
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  ECAT_FUNC_HEADER;
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  cmd->type = ECAT_CMD_APWR;
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  cmd->address.phy.dev.pos = ring_position;
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  cmd->address.phy.mem = offset;
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  ECAT_FUNC_WRITE_FOOTER;
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}
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/*****************************************************************************/
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/**
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   Initialisiert ein EtherCAT-BRD-Kommando.
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   Alloziert ein "broadcast read"-Kommando
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   und fügt es in die Liste des Masters ein.
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   @param cmd Zeiger auf das Kommando
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   @param offset Physikalische Speicheradresse im Slave
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   @param length Länge der zu lesenden Daten
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*/
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void EtherCAT_command_broadcast_read(EtherCAT_command_t *cmd,
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                                     unsigned short offset,
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                                     unsigned int length)
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{
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  ECAT_FUNC_HEADER;
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  cmd->type = ECAT_CMD_BRD;
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  cmd->address.phy.dev.node = 0x0000;
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  cmd->address.phy.mem = offset;
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  ECAT_FUNC_READ_FOOTER;
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}
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/*****************************************************************************/
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/**
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   Initialisiert ein EtherCAT-BWR-Kommando.
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   Alloziert ein "broadcast write"-Kommando
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   und fügt es in die Liste des Masters ein.
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   @param cmd Zeiger auf das Kommando
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   @param offset Physikalische Speicheradresse im Slave
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   @param length Länge der zu schreibenden Daten
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   @param data Zeiger auf Speicher mit zu schreibenden Daten
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*/
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void EtherCAT_command_broadcast_write(EtherCAT_command_t *cmd,
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                                      unsigned short offset,
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                                      unsigned int length,
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                                      const unsigned char *data)
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{
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  ECAT_FUNC_HEADER;
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  cmd->type = ECAT_CMD_BWR;
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  cmd->address.phy.dev.node = 0x0000;
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  cmd->address.phy.mem = offset;
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  ECAT_FUNC_WRITE_FOOTER;
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}
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/*****************************************************************************/
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/**
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   Initialisiert ein EtherCAT-LRW-Kommando.
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   Alloziert ein "logical read write"-Kommando
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   und fügt es in die Liste des Masters ein.
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   @param cmd Zeiger auf das Kommando
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   @param offset Logische Speicheradresse
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   @param length Länge der zu lesenden/schreibenden Daten
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   @param data Zeiger auf Speicher mit zu lesenden/schreibenden Daten
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*/
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void EtherCAT_command_logical_read_write(EtherCAT_command_t *cmd,
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                                         unsigned int offset,
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                                         unsigned int length,
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                                         unsigned char *data)
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{
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  ECAT_FUNC_HEADER;
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  cmd->type = ECAT_CMD_LRW;
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  cmd->address.logical = offset;
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  ECAT_FUNC_WRITE_FOOTER;
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}
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/*****************************************************************************/