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/*

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This file is part of CanFestival, a library implementing CanOpen Stack.

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Copyright (C): Edouard TISSERANT and Francis DUPIN

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See COPYING file for copyrights details.

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This library is free software; you can redistribute it and/or

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modify it under the terms of the GNU Lesser General Public

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License as published by the Free Software Foundation; either

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version 2.1 of the License, or (at your option) any later version.

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This library 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

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Lesser General Public License for more details.

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You should have received a copy of the GNU Lesser General Public

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License along with this library; if not, write to the Free Software

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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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*/

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/** @defgroup comobj Communication Objects

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 *  @ingroup userapi

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 */

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/** @defgroup sdo Service Data Object (SDO)

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 *  SDOs provide the access to entries in the CANopen Object Dictionary.

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 * 	An SDO is made up of at least two CAN messages with different identifiers.

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 * 	SDO s are always confirmed point-to-point communications services. 

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 *  @ingroup comobj

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 */

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#ifndef __sdo_h__

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#define __sdo_h__

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struct struct_s_transfer;

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#include "timers.h"

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/* Block mode : Data consumer receive step 

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 * - set to RXSTEP_STARTED when client receive initiate upload response 

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 * - set to RXSTEP_END when last segment of a block received 

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 */

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typedef enum {RXSTEP_INIT, RXSTEP_STARTED, RXSTEP_END } rxStep_t;

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typedef void (*SDOCallback_t)(CO_Data* d, UNS8 nodeId);

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/* The Transfer structure

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Used to store the different segments of

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 - a SDO received before writing in the dictionary

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 - the reading of the dictionary to put on a SDO to transmit

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WARNING : after a change in this structure check the macro s_transfer_Initializer in data.h

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*/

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struct struct_s_transfer {

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  UNS8           CliServNbr; /**< The index of the SDO client / server in our OD minus 0x1280 / 0x1200 */

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  UNS8           whoami;     /**< Takes the values SDO_CLIENT or SDO_SERVER */

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  UNS8           state;      /**< state of the transmission : Takes the values SDO_... */

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  UNS8           toggle;	

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  UNS32          abortCode;  /**< Sent or received */

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  /**< index and subindex of the dictionary where to store */

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  /**< (for a received SDO) or to read (for a transmit SDO) */

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  UNS16          index;

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  UNS8           subIndex;

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  UNS32          count;      /**< Number of data received or to be sent. */

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  UNS32          offset;     /**< stack pointer of data[]

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                              * Used only to tranfer part of a line to or from a SDO.

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                              * offset is always pointing on the next free cell of data[].

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                              * WARNING s_transfer.data is subject to ENDIANISATION

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                              * (with respect to CANOPEN_BIG_ENDIAN)

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                              */

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  UNS8           data [SDO_MAX_LENGTH_TRANSFER];

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#ifdef SDO_DYNAMIC_BUFFER_ALLOCATION

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  UNS8           *dynamicData;

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  UNS32          dynamicDataSize;

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#endif //SDO_DYNAMIC_BUFFER_ALLOCATION

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  UNS8           peerCRCsupport;    /**< True if peer supports CRC */

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  UNS8           blksize;           /**< Number of segments per block with 0 < blksize < 128 */

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  UNS8           ackseq;            /**< sequence number of last segment that was received successfully */

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  UNS32          objsize;           /**< Size in bytes of the object provided by data producer */

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  UNS8           lastblockoffset;   /**< Value of offset before last block */

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  UNS8           seqno;             /**< Last sequence number received OK or transmitted */   

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  UNS8           endfield;          /**< nbr of bytes in last segment of last block that do not contain data */

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  rxStep_t       rxstep;            /**< data consumer receive step - set to true when last segment of a block received */

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  UNS8           tmpData[8];        /**< temporary segment storage */

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  UNS8           dataType;   /**< Defined in objdictdef.h Value is visible_string

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                              * if it is a string, any other value if it is not a string,

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                              * like 0. In fact, it is used only if client.

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                              */

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  TIMER_HANDLE   timer;      /**< Time counter to implement a timeout in milliseconds.

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                              * It is automatically incremented whenever

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                              * the line state is in SDO_DOWNLOAD_IN_PROGRESS or

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                              * SDO_UPLOAD_IN_PROGRESS, and reseted to 0

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                              * when the response SDO have been received.

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                              */

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  SDOCallback_t Callback;   /**< The user callback func to be called at SDO transaction end */

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};

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typedef struct struct_s_transfer s_transfer;

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#include "data.h"

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/** 

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 * @brief Reset of a SDO exchange on timeout.

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 * Send a SDO abort.

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 * @param *d Pointer on a CAN object data structure

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 * @param id

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 */

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void SDOTimeoutAlarm(CO_Data* d, UNS32 id);

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/** 

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 * @brief Reset all SDO buffers.

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 * @param *d Pointer on a CAN object data structure

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 */

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void resetSDO (CO_Data* d);

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/** 

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 * @brief Copy the data received from the SDO line transfer to the object dictionary.

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 * @param *d Pointer on a CAN object data structure

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 * @param line SDO line

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 * @return SDO error code if error. Else, returns 0.

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 */

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UNS32 SDOlineToObjdict (CO_Data* d, UNS8 line);

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/** 

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 * @brief Copy the data from the object dictionary to the SDO line for a network transfer.

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 * @param *d Pointer on a CAN object data structure

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 * @param line SDO line

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 * @return SDO error code if error. Else, returns 0.

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 */

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UNS32 objdictToSDOline (CO_Data* d, UNS8 line);

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/** 

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 * @brief Copy data from an existant line in the argument "* data"

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 * @param d Pointer on a CAN object data structure

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 * @param line SDO line

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 * @param nbBytes

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 * @param *data Pointer on the data

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 * @return 0xFF if error. Else, returns 0.

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 */

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UNS8 lineToSDO (CO_Data* d, UNS8 line, UNS32 nbBytes, UNS8 * data);

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/** 

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 * @brief Add data to an existant line

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 * @param d Pointer on a CAN object data structure

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 * @param line SDO line

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 * @param nbBytes

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 * @param *data Pointer on the data

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 * @return 0xFF if error. Else, returns 0.

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 */

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UNS8 SDOtoLine (CO_Data* d, UNS8 line, UNS32 nbBytes, UNS8 * data);

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/** 

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 * @brief Called when an internal SDO abort occurs.

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 * Release the line * Only if server *

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 * If client, the line must be released manually in the core application.

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 * The reason of that is to permit the program to read the transfers structure before its reset,

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 * because many informations are stored on it : index, subindex, data received or trasmited, ...

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 * In all cases, sends a SDO abort.

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 * @param *d Pointer on a CAN object data structure

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 * @param CliServNbr

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 * @param whoami

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 * @param index

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 * @param subIndex

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 * @param abortCode

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 * @return 0

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 */

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UNS8 failedSDO (CO_Data* d, UNS8 CliServNbr, UNS8 whoami, UNS16 index, UNS8 subIndex, UNS32 abortCode);

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/** 

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 * @brief Reset an unused line.

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 * @param *d Pointer on a CAN object data structure

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 * @param line SDO line

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 */

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void resetSDOline (CO_Data* d, UNS8 line);

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/** 

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 * @brief Initialize some fields of the structure.

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 * @param *d Pointer on a CAN object data structure

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 * @param line

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 * @param CliServNbr

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 * @param index

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 * @param subIndex

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 * @param state

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 * @return 0

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 */

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UNS8 initSDOline (CO_Data* d, UNS8 line, UNS8 CliServNbr, UNS16 index, UNS8 subIndex, UNS8 state);

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/** 

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 * @brief Search for an unused line in the transfers array

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 * to store a new SDO.

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 * ie a line which value of the field "state" is "SDO_RESET"

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 * An unused line have the field "state" at the value SDO_RESET

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 * @param *d Pointer on a CAN object data structure

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 * @param whoami Create the line for a SDO_SERVER or SDO_CLIENT.

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 * @param *line Pointer on a SDO line 

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 * @return 0xFF if all the lines are on use. Else, return 0.

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 */

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UNS8 getSDOfreeLine (CO_Data* d, UNS8 whoami, UNS8 *line);

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/** 

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 * @brief Search for the line, in the transfers array, which contains the

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 * beginning of the reception of a fragmented SDO

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 * @param *d Pointer on a CAN object data structure

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 * @param CliServNbr Client or Server object involved

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 * @param whoami takes 2 values : look for a line opened as SDO_CLIENT or SDO_SERVER

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 * @param *line Pointer on a SDO line 

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 * @return 0xFF if error.  Else, return 0

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 */

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UNS8 getSDOlineOnUse (CO_Data* d, UNS8 CliServNbr, UNS8 whoami, UNS8 *line);

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/** 

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 * @brief Search for the line, in the transfers array, which contains the

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 * beginning of the reception of a fragmented SDO

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 *

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 * Because getSDOlineOnUse() does not return any line in state \c SDO_ABORTED_INTERNAL,

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 * this funtion is used to return them, too.

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 *

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 * @param *d Pointer on a CAN object data structure

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 * @param CliServNbr Client or Server object involved

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 * @param whoami takes 2 values : look for a line opened as SDO_CLIENT or SDO_SERVER

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 * @param *line Pointer on a SDO line

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 * @return 0xFF if error.  Else, return 0

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 */

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UNS8 getSDOlineToClose (CO_Data* d, UNS8 CliServNbr, UNS8 whoami, UNS8 *line);

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/** 

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 * @brief Close a transmission.

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 * @param *d Pointer on a CAN object data structure

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 * @param CliServNbr Client or Server object involved

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 * @param whoami Line opened as SDO_CLIENT or SDO_SERVER

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 */

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UNS8 closeSDOtransfer (CO_Data* d, UNS8 CliServNbr, UNS8 whoami);

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/** 

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 * @brief Bytes in the line structure which must be transmited (or received)

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 * @param *d Pointer on a CAN object data structure

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 * @param line SDO line 

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 * @param *nbBytes Pointer on nbBytes

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 * @return 0.

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 */

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UNS8 getSDOlineRestBytes (CO_Data* d, UNS8 line, UNS32 * nbBytes);

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/** 

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 * @brief Store in the line structure the nb of bytes which must be transmited (or received)

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 * @param *d Pointer on a CAN object data structure

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 * @param line SDO line 

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 * @param nbBytes

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 * @return 0 if success, 0xFF if error.

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 */

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UNS8 setSDOlineRestBytes (CO_Data* d, UNS8 line, UNS32 nbBytes);

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/**

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 * @brief Transmit a SDO frame on the bus bus_id

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 * @param *d Pointer on a CAN object data structure

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 * @param whoami Takes 2 values : SDO_CLIENT or SDO_SERVER

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 * @param CliServNbr Client or Server object involved

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 * @param data Array of the 8 bytes to transmit

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 * @return canSend(bus_id,&m) or 0xFF if error.

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 */

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UNS8 sendSDO (CO_Data* d, UNS8 whoami, UNS8 CliServNbr, UNS8 *pData);

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/** 

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 * @brief Transmit a SDO error to the client. The reasons may be :

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 * Read/Write to a undefined object

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 * Read/Write to a undefined subindex

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 * Read/write a not valid length object

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 * Write a read only object

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 * @param *d Pointer on a CAN object data structure

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 * @param whoami takes 2 values : SDO_CLIENT or SDO_SERVER

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 * @param CliServNbr

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 * @param index

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 * @param subIndex

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 * @param abortCode

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 * @return 0

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 */

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UNS8 sendSDOabort (CO_Data* d, UNS8 whoami, UNS8 CliServNbr, UNS16 index, UNS8 subIndex, UNS32 abortCode);

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/** 

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 * @brief Treat a SDO frame reception

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 * call the function sendSDO

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 * @param *d Pointer on a CAN object data structure

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 * @param *m Pointer on a CAN message structure 

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 * @return code : 

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 * 		   - 0xFF if error

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 *         - 0x80 if transfer aborted by the server

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 *         - 0x0  ok

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 */

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UNS8 proceedSDO (CO_Data* d, Message *m);

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/** 

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 * @ingroup sdo

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 * @brief Used to send a SDO request frame to write the data at the index and subIndex indicated

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 * @param *d Pointer to a CAN object data structure

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 * @param nodeId Node Id of the slave

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 * @param index At index indicated

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 * @param subIndex At subIndex indicated

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 * @param count number of bytes to write in the dictionnary.

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 * @param dataType (defined in objdictdef.h) : put "visible_string" for strings, 0 for integers or reals or other value.

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 * @param *data Pointer to data

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 * @return 

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 * - 0 is returned upon success.

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 * - 0xFE is returned when no sdo client to communicate with node.

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 * - 0xFF is returned when error occurs.

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 */

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UNS8 writeNetworkDict (CO_Data* d, UNS8 nodeId, UNS16 index,

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		       UNS8 subIndex, UNS32 count, UNS8 dataType, void *data, UNS8 useBlockMode);

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/** 

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 * @ingroup sdo

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 * @brief Used to send a SDO request frame to write in a distant node dictionnary.

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 * @details The function Callback which must be defined in the user code is called at the

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 * end of the exchange. (on succes or abort).

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 * @param *d Pointer to a CAN object data structure

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 * @param nodeId Node Id of the slave

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 * @param index At index indicated

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 * @param subIndex At subIndex indicated

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 * @param count number of bytes to write in the dictionnary.

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 * @param dataType (defined in objdictdef.h) : put "visible_string" for strings, 0 for integers or reals or other value.

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 * @param *data Pointer to data

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 * @param Callback Callback function

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 * @return 

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 * - 0 is returned upon success.

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 * - 0xFE is returned when no sdo client to communicate with node.

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 * - 0xFF is returned when error occurs.

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 */

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UNS8 writeNetworkDictCallBack (CO_Data* d, UNS8 nodeId, UNS16 index,

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		       UNS8 subIndex, UNS32 count, UNS8 dataType, void *data, SDOCallback_t Callback, UNS8 useBlockMode);

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/**

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 * @ingroup sdo 

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 * @brief Used to send a SDO request frame to write in a distant node dictionnary.

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 * @details The function Callback which must be defined in the user code is called at the

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 * end of the exchange. (on succes or abort). First free SDO client parameter is

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 * automatically initialized for specific node if not already defined.

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 * @param *d Pointer to a CAN object data structure

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 * @param nodeId Node Id of the slave

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 * @param index At index indicated

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 * @param subIndex At subIndex indicated

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 * @param count number of bytes to write in the dictionnary.

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 * @param dataType (defined in objdictdef.h) : put "visible_string" for strings, 0 for integers or reals or other value.

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 * @param *data Pointer to data

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 * @param Callback Callback function

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 * @param endianize When not 0, data is endianized into network byte order

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 *                  when 0, data is not endianized and copied in machine native

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 *                  endianness

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 * @return 

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 * - 0 is returned upon success.

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 * - 0xFF is returned when error occurs.

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 */

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UNS8 writeNetworkDictCallBackAI (CO_Data* d, UNS8 nodeId, UNS16 index,

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		       UNS8 subIndex, UNS32 count, UNS8 dataType, void *data, SDOCallback_t Callback, UNS8 endianize, UNS8 useBlockMode);

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/**

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 * @ingroup sdo 

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 * @brief Used to send a SDO request frame to read.

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 * @param *d Pointer to a CAN object data structure

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 * @param nodeId Node Id of the slave

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 * @param index At index indicated

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 * @param subIndex At subIndex indicated

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 * @param dataType (defined in objdictdef.h) : put "visible_string" for strings, 0 for integers or reals or other value.

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 * @return 

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 * - 0 is returned upon success.

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 * - 0xFE is returned when no sdo client to communicate with node.

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 * - 0xFF is returned when error occurs.

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 */

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UNS8 readNetworkDict (CO_Data* d, UNS8 nodeId, UNS16 index, UNS8 subIndex, UNS8 dataType, UNS8 useBlockMode);

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/** 

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 * @ingroup sdo

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 * @brief Used to send a SDO request frame to read in a distant node dictionnary.

   377

 * @details The function Callback which must be defined in the user code is called at the

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 * end of the exchange. (on succes or abort).

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 * @param *d Pointer on a CAN object data structure

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 * @param nodeId Node Id of the slave

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 * @param index At index indicated

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 * @param subIndex At subIndex indicated

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 * @param dataType (defined in objdictdef.h) : put "visible_string" for strings, 0 for integers or reals or other value.

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 * @param Callback Callback function

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 * @return 

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 * - 0 is returned upon success.

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 * - 0xFE is returned when no sdo client to communicate with node.

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 * - 0xFF is returned when error occurs.

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 */

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UNS8 readNetworkDictCallback (CO_Data* d, UNS8 nodeId, UNS16 index, UNS8 subIndex, UNS8 dataType, SDOCallback_t Callback, UNS8 useBlockMode);

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   392

/** 

   393

 * @ingroup sdo

   394

 * @brief Used to send a SDO request frame to read in a distant node dictionnary.

   395

 * @details The function Callback which must be defined in the user code is called at the

   396

 * end of the exchange. (on succes or abort). First free SDO client parameter is

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 * automatically initialized for specific node if not already defined.

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 * @param *d Pointer on a CAN object data structure

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 * @param nodeId Node Id of the slave

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 * @param index At index indicated

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 * @param subIndex At subIndex indicated

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 * @param dataType (defined in objdictdef.h) : put "visible_string" for strings, 0 for integers or reals or other value.

   403

 * @param Callback Callback function

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 * @return 

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 * - 0 is returned upon success.

   406

 * - 0xFF is returned when error occurs.

   407

 */

   408

UNS8 readNetworkDictCallbackAI (CO_Data* d, UNS8 nodeId, UNS16 index, UNS8 subIndex, UNS8 dataType, SDOCallback_t Callback, UNS8 useBlockMode);

   409

   410

/** 

   411

 * @ingroup sdo

   412

 * @brief Use this function after calling readNetworkDict to get the result.

   413

 * 

   414

 * @param *d Pointer to a CAN object data structure

   415

 * @param nodeId Node Id of the slave

   416

 * @param *data Pointer to the buffer to get the data

   417

 * @param *size Pointer to the size : MUST contain the size of the buffer before calling

   418

 *                                    The function set it to the actual number of written bytes

   419

 * @param *abortCode Pointer to the abortcode. (0 = not available. Else : SDO abort code. (received if return SDO_ABORTED_RCV)

   420

 * 

   421

 * 

   422

 * @return

   423

 *           - SDO_FINISHED             // datas are available

   424

 *           - SDO_ABORTED_RCV          // Transfer failed (abort SDO received)

   425

 *           - SDO_ABORTED_INTERNAL     // Transfer failed (internal abort)

   426

 *           - SDO_UPLOAD_IN_PROGRESS   // Datas are not yet available

   427

 *           - SDO_DOWNLOAD_IN_PROGRESS // Download is in progress

   428

 *           - SDO_PROVIDED_BUFFER_TOO_SMALL //The value *size is not enough to store the received data

   429

 * \n\n

   430

 * example :

   431

 * @code

   432

 * UNS32 data;

   433

 * UNS8 size;

   434

 * readNetworkDict(0, 0x05, 0x1016, 1, 0) // get the data index 1016 subindex 1 of node 5

   435

 * while (getReadResultNetworkDict (0, 0x05, &data, &size) == SDO_UPLOAD_IN_PROGRESS);

   436

 * @endcode

   437

*/

   438

UNS8 getReadResultNetworkDict (CO_Data* d, UNS8 nodeId, void* data, UNS32 *size, UNS32 * abortCode);

   439

   440

/**

   441

 * @ingroup sdo

   442

 * @brief Use this function after calling writeNetworkDict function to get the result of the write.

   443

 * @details It is mandatory to call this function because it is releasing the line used for the transfer.

   444

 * @param *d Pointer to a CAN object data structure

   445

 * @param nodeId Node Id of the slave

   446

 * @param *abortCode Pointer to the abortcode

   447

 * - 0 = not available. 

   448

 * - SDO abort code (received if return SDO_ABORTED_RCV)

   449

 * 

   450

 * @return : 

   451

 *           - SDO_FINISHED             // datas are available

   452

 *           - SDO_ABORTED_RCV          // Transfer failed (abort SDO received)

   453

 *           - SDO_ABORTED_INTERNAL     // Transfer failed (Internal abort)

   454

 *           - SDO_DOWNLOAD_IN_PROGRESS // Datas are not yet available

   455

 *           - SDO_UPLOAD_IN_PROGRESS   // Upload in progress

   456

 * \n\n

   457

 * example :

   458

 * @code

   459

 * UNS32 data = 0x50;

   460

 * UNS8 size;

   461

 * UNS32 abortCode;

   462

 * writeNetworkDict(0, 0x05, 0x1016, 1, size, &data) // write the data index 1016 subindex 1 of node 5

   463

 * while (getWriteResultNetworkDict (0, 0x05, &abortCode) == SDO_DOWNLOAD_IN_PROGRESS);

   464

 * @endcode

   465

*/

   466

UNS8 getWriteResultNetworkDict (CO_Data* d, UNS8 nodeId, UNS32 * abortCode);

   467

   468

#endif