/** * CANopen Service Data Object - server protocol. * * @file CO_SDOserver.h * @ingroup CO_SDOserver * @author Janez Paternoster * @copyright 2020 Janez Paternoster * * This file is part of , a CANopen Stack. * * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this * file except in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License is * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and limitations under the License. */ #ifndef CO_SDO_SERVER_H #define CO_SDO_SERVER_H #include "301/CO_driver.h" #include "301/CO_ODinterface.h" /* default configuration, see CO_config.h */ #ifndef CO_CONFIG_SDO_SRV #define CO_CONFIG_SDO_SRV \ (CO_CONFIG_SDO_SRV_SEGMENTED | CO_CONFIG_GLOBAL_FLAG_CALLBACK_PRE | CO_CONFIG_GLOBAL_FLAG_TIMERNEXT \ | CO_CONFIG_GLOBAL_FLAG_OD_DYNAMIC) #endif #ifndef CO_CONFIG_SDO_SRV_BUFFER_SIZE #define CO_CONFIG_SDO_SRV_BUFFER_SIZE 32U #endif #ifdef __cplusplus extern "C" { #endif /** * @defgroup CO_SDOserver SDO server * CANopen Service Data Object - server protocol. * * @ingroup CO_CANopen_301 * @{ * Service data objects (SDOs) allow the access to any entry of the CANopen Object dictionary. By SDO a peer-to-peer * communication channel between two CANopen devices is established. In addition, the SDO protocol enables to transfer * any amount of data in a segmented way. Therefore the SDO protocol is mainly used in order to communicate * configuration data. * * All CANopen devices must have implemented SDO server and first SDO server channel. Servers serves data from Object * dictionary. Object dictionary is a collection of variables, arrays or records (structures), which can be used by the * stack or by the application. This file (CO_SDOserver.h) implements SDO server. * * SDO client can be (optionally) implemented on one (or multiple, if multiple SDO channels are used) device in CANopen * network. Usually this is master device and provides also some kind of user interface, so configuration of the network * is possible. Code for the SDO client is in file CO_SDOclient.h. * * SDO communication cycle is initiated by the client. Client can upload (read) data from device or can download (write) * data to device. If data size is less or equal to 4 bytes, communication is finished by one server response (expedited * transfer). If data size is longer, data are split into multiple segments of request/response pairs (normal or * segmented transfer). For longer data there is also a block transfer protocol, which transfers larger block of data in * secure way with little protocol overhead. If error occurs during SDO transfer #CO_SDO_abortCode_t is send by client * or server and transfer is terminated. For more details see #CO_SDO_state_t. * * Access to Object dictionary is specified in @ref CO_ODinterface. */ /** * Internal state flags indicate type of transfer * * These flags correspond to the upper nibble of the SDO state machine states and can be used to determine the type of * state an SDO object is in. */ #define CO_SDO_ST_FLAG_DOWNLOAD 0x10U #define CO_SDO_ST_FLAG_UPLOAD 0x20U #define CO_SDO_ST_FLAG_BLOCK 0x40U /** * Internal states of the SDO state machine. * * Upper nibble of byte indicates type of state: * 0x10: Download * 0x20: Upload * 0x40: Block Mode * * Note: CANopen has little endian byte order. */ typedef enum { /** * - SDO client may start new download to or upload from specified node, specified index and specified subindex. It * can start normal or block communication. * - SDO server is waiting for client request. */ CO_SDO_ST_IDLE = 0x00U, /** * - SDO client or server may send SDO abort message in case of error: * - byte 0: @b 10000000 binary. * - byte 1..3: Object index and subIndex. * - byte 4..7: #CO_SDO_abortCode_t. */ CO_SDO_ST_ABORT = 0x01U, /** * - SDO client: Node-ID of the SDO server is the same as node-ID of this node, SDO client is the same device as * SDO server. Transfer data directly without communication on CAN. * - SDO server does not use this state. */ CO_SDO_ST_DOWNLOAD_LOCAL_TRANSFER = 0x10U, /** * - SDO client initiates SDO download: * - byte 0: @b 0010nnes binary: (nn: if e=s=1, number of data bytes, that do @b not contain data; e=1 for * expedited transfer; s=1 if data size is indicated.) * - byte 1..3: Object index and subIndex. * - byte 4..7: If e=1, expedited data are here. If e=0 s=1, size of data for segmented transfer is indicated here. * - SDO server is in #CO_SDO_ST_IDLE state and waits for client request. */ CO_SDO_ST_DOWNLOAD_INITIATE_REQ = 0x11U, /** * - SDO client waits for response. * - SDO server responses: * - byte 0: @b 01100000 binary. * - byte 1..3: Object index and subIndex. * - byte 4..7: Reserved. * - In case of expedited transfer communication ends here. */ CO_SDO_ST_DOWNLOAD_INITIATE_RSP = 0x12U, /** * - SDO client sends SDO segment: * - byte 0: @b 000tnnnc binary: (t: toggle bit, set to 0 in first segment; nnn: number of data bytes, that do * @b not contain data; c=1 if this is the last segment). * - byte 1..7: Data segment. * - SDO server waits for segment. */ CO_SDO_ST_DOWNLOAD_SEGMENT_REQ = 0x13U, /** * - SDO client waits for response. * - SDO server responses: * - byte 0: @b 001t0000 binary: (t: toggle bit, set to 0 in first segment). * - byte 1..7: Reserved. * - If c was set to 1, then communication ends here. */ CO_SDO_ST_DOWNLOAD_SEGMENT_RSP = 0x14U, /** * - SDO client: Node-ID of the SDO server is the same as node-ID of this node, SDO client is the same device as * SDO server. Transfer data directly without communication on CAN. * - SDO server does not use this state. */ CO_SDO_ST_UPLOAD_LOCAL_TRANSFER = 0x20U, /** * - SDO client initiates SDO upload: * - byte 0: @b 01000000 binary. * - byte 1..3: Object index and subIndex. * - byte 4..7: Reserved. * - SDO server is in #CO_SDO_ST_IDLE state and waits for client request. */ CO_SDO_ST_UPLOAD_INITIATE_REQ = 0x21U, /** * - SDO client waits for response. * - SDO server responses: * - byte 0: @b 0100nnes binary: (nn: if e=s=1, number of data bytes, that do @b not contain data; e=1 for * expedited transfer; s=1 if data size is indicated). * - byte 1..3: Object index and subIndex. * - byte 4..7: If e=1, expedited data are here. If e=0 s=1, size of data for segmented transfer is indicated here. * - In case of expedited transfer communication ends here. */ CO_SDO_ST_UPLOAD_INITIATE_RSP = 0x22U, /** * - SDO client requests SDO segment: * - byte 0: @b 011t0000 binary: (t: toggle bit, set to 0 in first segment). * - byte 1..7: Reserved. * - SDO server waits for segment request. */ CO_SDO_ST_UPLOAD_SEGMENT_REQ = 0x23U, /** * - SDO client waits for response. * - SDO server responses with data: * - byte 0: @b 000tnnnc binary: (t: toggle bit, set to 0 in first segment; nnn: number of data bytes, that do * @b not contain data; c=1 if this is the last segment). * - byte 1..7: Data segment. * - If c is set to 1, then communication ends here. */ CO_SDO_ST_UPLOAD_SEGMENT_RSP = 0x24U, /** * - SDO client initiates SDO block download: * - byte 0: @b 11000rs0 binary: (r=1 if client supports generating CRC on data; s=1 if data size is indicated.) * - byte 1..3: Object index and subIndex. * - byte 4..7: If s=1, then size of data for block download is indicated here. * - SDO server is in #CO_SDO_ST_IDLE state and waits for client request. */ CO_SDO_ST_DOWNLOAD_BLK_INITIATE_REQ = 0x51U, /** * - SDO client waits for response. * - SDO server responses: * - byte 0: @b 10100r00 binary: (r=1 if server supports generating CRC on data.) * - byte 1..3: Object index and subIndex. * - byte 4: blksize: Number of segments per block that shall be used by the client for the following block * download with 0 < blksize < 128. * - byte 5..7: Reserved. */ CO_SDO_ST_DOWNLOAD_BLK_INITIATE_RSP = 0x52U, /** * - SDO client sends 'blksize' segments of data in sequence: * - byte 0: @b cnnnnnnn binary: (c=1 if no more segments to be downloaded, enter SDO block download end phase; * nnnnnnn is sequence number of segment, 1..127. * - byte 1..7: At most 7 bytes of segment data to be downloaded. * - SDO server reads sequence of 'blksize' blocks. */ CO_SDO_ST_DOWNLOAD_BLK_SUBBLOCK_REQ = 0x53U, /** * - SDO client waits for response. * - SDO server responses: * - byte 0: @b 10100010 binary. * - byte 1: ackseq: sequence number of last segment that was received successfully during the last block * download. If ackseq is set to 0 the server indicates the client that the segment with the sequence number 1 * was not received correctly and all segments shall be retransmitted by the client. * - byte 2: Number of segments per block that shall be used by the client for the following block download with * 0 < blksize < 128. * - byte 3..7: Reserved. * - If c was set to 1, then communication enters SDO block download end phase. */ CO_SDO_ST_DOWNLOAD_BLK_SUBBLOCK_RSP = 0x54U, /** * - SDO client sends SDO block download end: * - byte 0: @b 110nnn01 binary: (nnn: number of data bytes, that do @b not contain data) * - byte 1..2: 16 bit CRC for the data set, if enabled by client and server. * - byte 3..7: Reserved. * - SDO server waits for client request. */ CO_SDO_ST_DOWNLOAD_BLK_END_REQ = 0x55U, /** * - SDO client waits for response. * - SDO server responses: * - byte 0: @b 10100001 binary. * - byte 1..7: Reserved. * - Block download successfully ends here. */ CO_SDO_ST_DOWNLOAD_BLK_END_RSP = 0x56U, /** * - SDO client initiates SDO block upload: * - byte 0: @b 10100r00 binary: (r=1 if client supports generating CRC on data.) * - byte 1..3: Object index and subIndex. * - byte 4: blksize: Number of segments per block with 0 < blksize < 128. * - byte 5: pst - protocol switch threshold. If pst > 0 and size of the data in bytes is less or equal pst, * then the server may switch to the SDO upload protocol #CO_SDO_ST_UPLOAD_INITIATE_RSP. * - byte 6..7: Reserved. * - SDO server is in #CO_SDO_ST_IDLE state and waits for client request. */ CO_SDO_ST_UPLOAD_BLK_INITIATE_REQ = 0x61U, /** * - SDO client waits for response. * - SDO server responses: * - byte 0: @b 11000rs0 binary: (r=1 if server supports generating CRC on data; s=1 if data size is indicated.) * - byte 1..3: Object index and subIndex. * - byte 4..7: If s=1, then size of data for block upload is indicated here. * - If enabled by pst, then server may alternatively response with #CO_SDO_ST_UPLOAD_INITIATE_RSP */ CO_SDO_ST_UPLOAD_BLK_INITIATE_RSP = 0x62U, /** * - SDO client sends second initiate for SDO block upload: * - byte 0: @b 10100011 binary. * - byte 1..7: Reserved. * - SDO server waits for client request. */ CO_SDO_ST_UPLOAD_BLK_INITIATE_REQ2 = 0x63U, /** * - SDO client reads sequence of 'blksize' blocks. * - SDO server sends 'blksize' segments of data in sequence: * - byte 0: @b cnnnnnnn binary: (c=1 if no more segments to be uploaded, enter SDO block upload end phase; * nnnnnnn is sequence number of segment, 1..127. * - byte 1..7: At most 7 bytes of segment data to be uploaded. */ CO_SDO_ST_UPLOAD_BLK_SUBBLOCK_SREQ = 0x64U, /** * - SDO client responses: * - byte 0: @b 10100010 binary. * - byte 1: ackseq: sequence number of last segment that was received successfully during the last block * upload. If ackseq is set to 0 the client indicates the server that the segment with the sequence number 1 was * not received correctly and all segments shall be retransmitted by the server. * - byte 2: Number of segments per block that shall be used by the server for the following block upload with * 0 < blksize < 128. * - byte 3..7: Reserved. * - SDO server waits for response. * - If c was set to 1 and all segments were successfull received, then communication enters SDO block upload end * phase. */ CO_SDO_ST_UPLOAD_BLK_SUBBLOCK_CRSP = 0x65U, /** * - SDO client waits for server request. * - SDO server sends SDO block upload end: * - byte 0: @b 110nnn01 binary: (nnn: number of data bytes, that do @b not contain data) * - byte 1..2: 16 bit CRC for the data set, if enabled by client and server. * - byte 3..7: Reserved. */ CO_SDO_ST_UPLOAD_BLK_END_SREQ = 0x66U, /** * - SDO client responses: * - byte 0: @b 10100001 binary. * - byte 1..7: Reserved. * - SDO server waits for response. * - Block download successfully ends here. Note that this communication ends with client response. Client may * then start next SDO communication immediately. */ CO_SDO_ST_UPLOAD_BLK_END_CRSP = 0x67U, } CO_SDO_state_t; /** * SDO abort codes. * * Send with Abort SDO transfer message. * * The abort codes not listed here are reserved. */ typedef enum { CO_SDO_AB_NONE = 0x00000000UL, /**< 0x00000000, No abort */ CO_SDO_AB_TOGGLE_BIT = 0x05030000UL, /**< 0x05030000, Toggle bit not altered */ CO_SDO_AB_TIMEOUT = 0x05040000UL, /**< 0x05040000, SDO protocol timed out */ CO_SDO_AB_CMD = 0x05040001UL, /**< 0x05040001, Command specifier not valid or unknown */ CO_SDO_AB_BLOCK_SIZE = 0x05040002UL, /**< 0x05040002, Invalid block size in block mode */ CO_SDO_AB_SEQ_NUM = 0x05040003UL, /**< 0x05040003, Invalid sequence number in block mode */ CO_SDO_AB_CRC = 0x05040004UL, /**< 0x05040004, CRC error (block mode only) */ CO_SDO_AB_OUT_OF_MEM = 0x05040005UL, /**< 0x05040005, Out of memory */ CO_SDO_AB_UNSUPPORTED_ACCESS = 0x06010000UL, /**< 0x06010000, Unsupported access to an object */ CO_SDO_AB_WRITEONLY = 0x06010001UL, /**< 0x06010001, Attempt to read a write only object */ CO_SDO_AB_READONLY = 0x06010002UL, /**< 0x06010002, Attempt to write a read only object */ CO_SDO_AB_NOT_EXIST = 0x06020000UL, /**< 0x06020000, Object does not exist in the object dictionary */ CO_SDO_AB_NO_MAP = 0x06040041UL, /**< 0x06040041, Object cannot be mapped to the PDO */ CO_SDO_AB_MAP_LEN = 0x06040042UL, /**< 0x06040042, Number and length of object to be mapped exceeds PDO length */ CO_SDO_AB_PRAM_INCOMPAT = 0x06040043UL, /**< 0x06040043, General parameter incompatibility reasons */ CO_SDO_AB_DEVICE_INCOMPAT = 0x06040047UL, /**< 0x06040047, General internal incompatibility in device */ CO_SDO_AB_HW = 0x06060000UL, /**< 0x06060000, Access failed due to hardware error */ CO_SDO_AB_TYPE_MISMATCH = 0x06070010UL, /**< 0x06070010, Data type does not match, length of service parameter does not match */ CO_SDO_AB_DATA_LONG = 0x06070012UL, /**< 0x06070012, Data type does not match, length of service parameter too high */ CO_SDO_AB_DATA_SHORT = 0x06070013UL, /**< 0x06070013, Data type does not match, length of service parameter too short */ CO_SDO_AB_SUB_UNKNOWN = 0x06090011UL, /**< 0x06090011, Sub index does not exist */ CO_SDO_AB_INVALID_VALUE = 0x06090030UL, /**< 0x06090030, Invalid value for parameter (download only). */ CO_SDO_AB_VALUE_HIGH = 0x06090031UL, /**< 0x06090031, Value range of parameter written too high */ CO_SDO_AB_VALUE_LOW = 0x06090032UL, /**< 0x06090032, Value range of parameter written too low */ CO_SDO_AB_MAX_LESS_MIN = 0x06090036UL, /**< 0x06090036, Maximum value is less than minimum value. */ CO_SDO_AB_NO_RESOURCE = 0x060A0023UL, /**< 0x060A0023, Resource not available: SDO connection */ CO_SDO_AB_GENERAL = 0x08000000UL, /**< 0x08000000, General error */ CO_SDO_AB_DATA_TRANSF = 0x08000020UL, /**< 0x08000020, Data cannot be transferred or stored to application */ CO_SDO_AB_DATA_LOC_CTRL = 0x08000021UL, /**< 0x08000021, Data cannot be transferred or stored to application because of local control */ CO_SDO_AB_DATA_DEV_STATE = 0x08000022UL, /**< 0x08000022, Data cannot be transferred or stored to application because of present device state */ CO_SDO_AB_DATA_OD = 0x08000023UL, /**< 0x08000023, Object dictionary not present or dynamic generation fails */ CO_SDO_AB_NO_DATA = 0x08000024UL /**< 0x08000024, No data available */ } CO_SDO_abortCode_t; /** * Return values from SDO server or client functions. */ typedef enum { CO_SDO_RT_waitingLocalTransfer = 6, /**< Waiting in client local transfer. */ CO_SDO_RT_uploadDataBufferFull = 5, /**< Data buffer is full. SDO client: data must be read before next upload cycle begins. */ CO_SDO_RT_transmittBufferFull = 4, /**< CAN transmit buffer is full. Waiting. */ CO_SDO_RT_blockDownldInProgress = 3, /**< Block download is in progress. Sending train of messages. */ CO_SDO_RT_blockUploadInProgress = 2, /**< Block upload is in progress. Receiving train of messages. SDO client: Data must not be read in this state. */ CO_SDO_RT_waitingResponse = 1, /**< Waiting server or client response. */ CO_SDO_RT_ok_communicationEnd = 0, /**< Success, end of communication. SDO client: uploaded data must be read. */ CO_SDO_RT_wrongArguments = -2, /**< Error in arguments */ CO_SDO_RT_endedWithClientAbort = -9, /**< Communication ended with client abort */ CO_SDO_RT_endedWithServerAbort = -10, /**< Communication ended with server abort */ } CO_SDO_return_t; /** * SDO server object. */ typedef struct { CO_CANmodule_t* CANdevTx; /**< From CO_SDOserver_init() */ CO_CANtx_t* CANtxBuff; /**< CAN transmit buffer inside CANdevTx for CAN tx message */ OD_t* OD; /**< From CO_SDOserver_init() */ uint8_t nodeId; /**< From CO_SDOserver_init() */ bool_t valid; /**< If true, SDO channel is valid */ volatile CO_SDO_state_t state; /**< Internal state of the SDO server */ OD_IO_t OD_IO; /**< Object dictionary interface for current object. */ uint16_t index; /**< Index of the current object in Object Dictionary */ uint8_t subIndex; /**< Subindex of the current object in Object Dictionary */ volatile void* CANrxNew; /**< Indicates, if new SDO message received from CAN bus. It is not cleared, until received message is completely processed. */ uint8_t CANrxData[8]; /**< 8 data bytes of the received message */ #if (((CO_CONFIG_SDO_SRV)&CO_CONFIG_FLAG_OD_DYNAMIC) != 0) || defined CO_DOXYGEN CO_CANmodule_t* CANdevRx; /**< From CO_SDOserver_init() */ uint16_t CANdevRxIdx; /**< From CO_SDOserver_init() */ uint16_t CANdevTxIdx; /**< From CO_SDOserver_init() */ uint32_t COB_IDClientToServer; /**< Copy of CANopen COB_ID Client -> Server, meaning of the specific bits: - Bit 0...10: 11-bit CAN identifier. - Bit 11..30: reserved, must be 0. - Bit 31: if 1, SDO client object is not used. */ uint32_t COB_IDServerToClient; /**< Copy of CANopen COB_ID Server -> Client, similar as above */ OD_extension_t OD_1200_extension; /**< Extension for OD object */ #endif #if (((CO_CONFIG_SDO_SRV)&CO_CONFIG_SDO_SRV_SEGMENTED) != 0) || defined CO_DOXYGEN OD_size_t sizeInd; /**< Size of data, which will be transferred. It is optionally indicated by client in case of download or by server in case of upload. */ OD_size_t sizeTran; /**< Size of data which is actually transferred. */ uint8_t toggle; /**< Toggle bit toggled in each segment in segmented transfer */ bool_t finished; /**< If true, then: data transfer is finished (by download) or read from OD variable is finished (by upload) */ uint32_t SDOtimeoutTime_us; /**< Maximum timeout time between request and response in microseconds */ uint32_t timeoutTimer; /**< Timeout timer for SDO communication */ uint8_t buf[CO_CONFIG_SDO_SRV_BUFFER_SIZE + 1U]; /**< Interim data buffer for segmented or block transfer + byte for '\0' */ OD_size_t bufOffsetWr; /**< Offset of next free data byte available for write in the buffer. */ OD_size_t bufOffsetRd; /**< Offset of first data available for read in the buffer */ #endif #if (((CO_CONFIG_SDO_SRV)&CO_CONFIG_SDO_SRV_BLOCK) != 0) || defined CO_DOXYGEN uint32_t block_SDOtimeoutTime_us; /**< Timeout time for SDO sub-block download, half of #SDOtimeoutTime_us */ uint32_t block_timeoutTimer; /**< Timeout timer for SDO sub-block download */ uint8_t block_seqno; /**< Sequence number of segment in block, 1..127 */ uint8_t block_blksize; /**< Number of segments per block, 1..127 */ uint8_t block_noData; /**< Number of bytes in last segment that do not contain data */ bool_t block_crcEnabled; /**< Client CRC support in block transfer */ uint16_t block_crc; /**< Calculated CRC checksum */ #endif #if (((CO_CONFIG_SDO_SRV)&CO_CONFIG_FLAG_CALLBACK_PRE) != 0) || defined CO_DOXYGEN void (*pFunctSignalPre)(void* object); /**< From CO_SDOserver_initCallbackPre() or NULL */ void* functSignalObjectPre; /**< From CO_SDOserver_initCallbackPre() or NULL */ #endif } CO_SDOserver_t; /** * Initialize SDO object. * * Function must be called in the communication reset section. * * @param SDO This object will be initialized. * @param OD Object Dictionary. * @param OD_1200_SDOsrvPar OD entry for SDO server parameter (0x1200+), can be NULL for default single SDO server and * must not be NULL for additional SDO servers. With additional SDO servers it may also have IO extension enabled, to * allow dynamic configuration (see also @ref CO_CONFIG_FLAG_OD_DYNAMIC). * @param nodeId If this is first SDO channel, then "nodeId" is CANopen Node ID of this device. In all additional * channels "nodeId" is ignored. * @param SDOtimeoutTime_ms Timeout time for SDO communication in milliseconds. * @param CANdevRx CAN device for SDO server reception. * @param CANdevRxIdx Index of receive buffer in the above CAN device. * @param CANdevTx CAN device for SDO server transmission. * @param CANdevTxIdx Index of transmit buffer in the above CAN device. * @param [out] errInfo Additional information in case of error, may be NULL. * * @return @ref CO_ReturnError_t CO_ERROR_NO in case of success. */ CO_ReturnError_t CO_SDOserver_init(CO_SDOserver_t* SDO, OD_t* OD, OD_entry_t* OD_1200_SDOsrvPar, uint8_t nodeId, uint16_t SDOtimeoutTime_ms, CO_CANmodule_t* CANdevRx, uint16_t CANdevRxIdx, CO_CANmodule_t* CANdevTx, uint16_t CANdevTxIdx, uint32_t* errInfo); #if (((CO_CONFIG_SDO_SRV)&CO_CONFIG_FLAG_CALLBACK_PRE) != 0) || defined CO_DOXYGEN /** * Initialize SDOrx callback function. * * Function initializes optional callback function, which should immediately start processing of CO_SDOserver_process() * function. Callback is called after SDOserver message is received from the CAN bus or when new call without delay is * necessary (SDO block transfer is in progress). * * @param SDO This object. * @param object Pointer to object, which will be passed to pFunctSignalPre(). Can be NULL * @param pFunctSignalPre Pointer to the callback function. Not called if NULL. */ void CO_SDOserver_initCallbackPre(CO_SDOserver_t* SDO, void* object, void (*pFunctSignalPre)(void* object)); #endif /** * Process SDO communication. * * Function must be called cyclically. * * @param SDO This object. * @param NMTisPreOrOperational True if #CO_NMT_internalState_t is NMT_PRE_OPERATIONAL or NMT_OPERATIONAL. * @param timeDifference_us Time difference from previous function call in [microseconds]. * @param [out] timerNext_us info to OS - see CO_process(). * * @return #CO_SDO_return_t */ CO_SDO_return_t CO_SDOserver_process(CO_SDOserver_t* SDO, bool_t NMTisPreOrOperational, uint32_t timeDifference_us, uint32_t* timerNext_us); /** @} */ /* CO_SDOserver */ #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* CO_SDO_SERVER_H */