WO2011145541A1 - バス制御装置及びバス制御方法 - Google Patents
バス制御装置及びバス制御方法 Download PDFInfo
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- WO2011145541A1 WO2011145541A1 PCT/JP2011/061136 JP2011061136W WO2011145541A1 WO 2011145541 A1 WO2011145541 A1 WO 2011145541A1 JP 2011061136 W JP2011061136 W JP 2011061136W WO 2011145541 A1 WO2011145541 A1 WO 2011145541A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40143—Bus networks involving priority mechanisms
- H04L12/4015—Bus networks involving priority mechanisms by scheduling the transmission of messages at the communication node
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
- G06F11/0745—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in an input/output transactions management context
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0766—Error or fault reporting or storing
- G06F11/0772—Means for error signaling, e.g. using interrupts, exception flags, dedicated error registers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0766—Error or fault reporting or storing
- G06F11/0781—Error filtering or prioritizing based on a policy defined by the user or on a policy defined by a hardware/software module, e.g. according to a severity level
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0766—Error or fault reporting or storing
- G06F11/0784—Routing of error reports, e.g. with a specific transmission path or data flow
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
- G06F13/22—Handling requests for interconnection or transfer for access to input/output bus using successive scanning, e.g. polling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection
Definitions
- the present invention connects a master-side circuit part on which a host CPU (Central Processing Unit) is mounted and a slave-side circuit part on which a device to be controlled is mounted via a back wiring board to connect a serial bus.
- the present invention relates to a bus control device and a bus control method configured to communicate with each other via a bus.
- An information processing device such as a network device connects a master-side circuit part on which a host CPU is mounted and a slave-side circuit part on which a device to be controlled is mounted via a backwiring board to transmit and receive Are configured to communicate with each other via a physically separated serial bus.
- a message is transmitted / received via a serial bus between a circuit part on which the host CPU is mounted and a plurality of circuit parts on which the control target device is mounted. Is indirectly accessed.
- Patent Document 1 describes centralized monitoring and control of each module regarding a monitoring control system in a system having a plurality of modules. This patent document 1 also describes hierarchical bus conversion between modules.
- the host CPU when a failure occurs in the device to be controlled, the host CPU receives the notification of the occurrence of the failure, then reads the failure information storage area of the corresponding device under the control bus and collects the failure information. Is going.
- the failure information storage area When reading the message, it is necessary to generate a message. For this reason, there is a problem that it takes time to acquire the failure information via the serial bus.
- failure data since failure data is added to response data, failure information cannot be acquired rapidly.
- the present invention is configured to connect a master-side circuit part on which a host CPU is mounted and a slave-side circuit part on which a device to be controlled is mounted via a serial bus.
- An object of the present invention is to provide a bus control device and a bus control method capable of promptly notifying host CPU of information on a target device.
- a bus control device includes a master circuit on which a control unit is mounted, a slave circuit on which a control target is mounted and performs message communication with the master circuit, and the master circuit, A master-side message generator for generating an access message for accessing the control target; and a master-side transmission for transmitting the access message to the slave circuit.
- a slave-side message generation unit that generates a response message to the access message and generates an information message based on the control target information And transmitting the response message and the information message to the master circuit.
- the slave message generating unit generates a product with the information message of the response message may conflict, generates preferentially the information message.
- a master circuit on which a control unit is mounted generates an access message for accessing a controlled object mounted on a slave circuit connected to the master circuit via a bus, and the slave
- the access message is transmitted to a circuit
- the slave circuit collects the information to be controlled, generates a response message for the access message and generates an information message based on the information to be controlled, and the response
- the message and the information message are transmitted to the master circuit, and the slave circuit preferentially generates the information message when the generation of the response message and the generation of the information message conflict.
- a failure information message is autonomously generated by the slave circuit and notified to the master circuit via the bus.
- the failure information message is generated with priority. For this reason, the control unit mounted on the master circuit can quickly acquire the failure information of the slave circuit and can reduce the time required for the failure processing.
- FIG. 1 is a block diagram showing the configuration of the bus control device according to the first embodiment of the present invention.
- a card 10 (master circuit) is a circuit part on which a master electronic circuit including a host CPU (Central Processing Unit) (control unit) 101 is mounted.
- the card 20 (slave circuit) is a circuit part on which a slave-side electronic circuit including control target devices 202-1 to 202-n (control target) is mounted.
- the control target devices 202-1 to 202-n are devices such as an EEPROM (Electrically Erasable and Programmable Read Only Memory) and a framer.
- the card 10 and the card 20 are connected via a back wiring board (not shown), and access is performed by transmitting and receiving messages to and from each other via the serial bus 30.
- FIG. 2 is an explanatory diagram of a transfer format in the bus control device according to the first embodiment of the present invention.
- the serial bus 30 includes a line used for transmitting a message from the card 10 to the card 20 and a line used for transmitting a message from the card 20 to the card 10.
- a message having a format as shown in FIG. 2 is transmitted and received between the card 10 and the card 20 via the serial bus 30.
- the message is composed of a message type, an access type, an access destination address, and data fields.
- the message type field stores an identifier indicating whether the message is read, written, or failure information.
- the access type field stores a type indicating whether the access by the message is single access or burst access.
- An address for reading / writing is stored in the access destination address field. This address is the head address of burst access when burst access is designated.
- the data field stores data to be written to the specified address for write access, data read from the specified address for read access, and failure for failure notification Is stored.
- the card 10 is provided with a master side bus conversion circuit 102.
- the master-side bus conversion circuit 102 is a circuit for performing bus conversion between the host CPU 101 and the serial bus 30, and generates a physical signal conversion function and a message to be output to the card 20 via the serial bus 30. It has a function to do.
- the master side bus conversion circuit 102 includes a bus interface 111, a register unit 112 (storage unit), a message assembly unit 113 (master side message generation unit), and a P / S (Parallel / Serial) unit 114 (master side transmission unit). ), An S / P (Serial / Parallel) unit 115, and a message determination unit 116.
- the bus interface 111 is an interface between the host CPU 101 and the master side bus conversion circuit 102.
- the bus interface 111 interfaces with the end of a control bus (such as a PCI (Peripheral-Component-Interconnect) bus) provided in the host CPU 101 and the register unit 112.
- a control bus such as a PCI (Peripheral-Component-Interconnect) bus
- the register unit 112 stores data for generating an access message for the host CPU 101 to access the card 20 via the serial bus 30. In addition, the register unit 112 stores data included in the response message for each type of response message from the message determination unit 116.
- the response message refers to a message indicating a response to writing / reading among messages received from the card 20.
- the message assembling unit 113 uses the access information (access destination address, read / write type, and write data in the case of writing) to the card 20 set in the register unit 112, as shown in FIG. A message in a format that can be transferred on the serial bus 30 is generated.
- the P / S unit 114 converts the message generated by the message assembly unit 113 from parallel data used for transmission inside the card 10 to serial data used for transmission via the serial bus 30, and converts the converted serial data to serial Output to the bus 30.
- the S / P unit 115 converts the message received from the card 20 via the serial bus 30 from serial data to parallel data, and outputs the converted parallel data to the message determination unit 116.
- the message determination unit 116 determines whether the message received from the card 20 is a response message indicating a response to writing / reading or a failure information message. When the message received from the card 20 is a response message, the message determination unit 116 further identifies whether the message is a response to writing or a response to reading. In addition, the message determination unit 116 outputs write response, read response (read data), or failure notification information to the register unit 112 according to the content of the message received from the card 20, and the arrival or failure of the response message. The host CPU 101 is notified of the arrival of the information message individually.
- the card 20 is provided with a slave side bus conversion circuit 201.
- the slave side bus conversion circuit 201 interfaces with the master side bus conversion circuit 102 via the serial bus 30, and analyzes / decomposes the access message generated by the master side bus conversion circuit 102.
- message decomposition refers to processing for dividing a message received from the card 10 into a message type (read / write) and an access type (burst access / single access) stored in the message. Then, the slave-side bus conversion circuit 201 accesses the controlled devices 202-1 to 202-n connected under the slave according to the message type of the decomposed message.
- the slave-side bus conversion circuit 201 assembles a message from the response data of the control target devices 202-1 to 202-n, and outputs the assembled message to the master-side bus conversion circuit 102. Further, when the slave side bus conversion circuit 201 collects fault information relating to the fault that has occurred in the controlled devices 202-1 to 202-n, the slave side bus conversion circuit 201 assembles a fault information message from the fault information and converts the fault information message into a master side bus conversion. Output to the circuit 102.
- the slave side bus conversion circuit 201 includes an S / P unit 211, a message decomposition unit 212, an access control unit 213, an alarm collection unit 214 (collection unit), a message assembly unit 215 (slave side message generation unit), P / S section 216 (slave side transmission section).
- the S / P unit 211 converts the message sent from the card 10 via the serial bus 30 from serial data to parallel data.
- the message disassembling unit 212 disassembles the access message sent from the card 10 to acquire bus access information, and notifies the access control unit 213 of this bus access information.
- the access control unit 213 Based on the bus access information received from the message decomposing unit 212, the access control unit 213 performs bus conversion and bus access in accordance with the access method (PCI bus or the like) of the devices to be controlled 202-1 to 202-n.
- the access result (information indicating normal end of writing or read data) is output to the message assembling unit 215.
- the alarm collection unit 214 collects failure information related to failures detected by the control target devices 202-1 to 202-n, and outputs the collected failure information to the message assembly unit 215.
- the message assembly unit 215 assembles the access result received from the access control unit 213 and the failure information from the alarm collection unit 214 into a serial bus communication message, and outputs the serial bus communication message to the P / S unit 216.
- the message assembly unit 215 outputs the failure information to the P / S unit 216 with priority.
- the P / S unit 216 has a function of converting the message generated by the message assembly unit 215 from parallel data to serial data.
- FIG. 1 when the host CPU 101 mounted on the card 10 controls the control target devices 202-1 to 202-n mounted on the card 20, the host CPU 101 passes through the bus interface 111.
- the access information (read / write type, access destination address, write data in the case of writing) is set in the register unit 112.
- the register unit 112 When the access information is set, the register unit 112 outputs the access information to the message assembly unit 113.
- the message assembling unit 113 When the access information is output from the register unit 112, the message assembling unit 113 generates an access message having a format as shown in FIG. 2 and outputs the generated access message to the P / S unit 114.
- the P / S unit 114 converts this access message from parallel data to serial data so as to match the serial bus interface of the serial bus 30, and sends the serial data access message to the serial bus 30.
- This access message is transmitted from the card 10 to the card 20 via the serial bus 30 and received by the S / P converter 211 of the card 20.
- the S / P unit 211 converts the received serial data into parallel data, and outputs the parallel data access message to the message decomposition unit 212.
- the message decomposition unit 212 decomposes the received access message for each access type (read / write), access destination address, and access unit (single access in the case of burst access). Then, when the access type indicates read, the message decomposing unit 212 outputs a read instruction and an access destination address to the access control unit 213 as an access instruction.
- the message decomposing unit 212 outputs a write instruction, an access destination address, and write data to the access control unit 213 as an access instruction.
- the access control unit 213 When the access control unit 213 obtains an access instruction from the message decomposing unit 212, the access control unit 213 performs read or write access using an access method corresponding to the control target devices 202-1 to 202-n. When the access to the controlled devices 202-1 to 202-n is normally completed, the access control unit 213 outputs a write completion notification to the message assembling unit 215 when the performed access is a write access. Is read access, the read data is output to the message assembling unit 215.
- the message assembly unit 215 When the message assembly unit 215 receives the access result from the access control unit 213, the message assembly unit 215 assembles a response message indicating the access result, and outputs the assembled response message to the P / S unit 216.
- the message generated by the message assembling unit 215 stores “read” or “write” in the message type field shown in FIG. 2, and the access result (write correct / incorrect) in the data field. Or read data read from a designated address) is stored.
- the alarm collection unit 214 of the card 20 receives an interrupt notification from the control target devices 202-1 to 202-n, or the alarm collection unit 214 periodically sends control target devices 202-1 to 202-n. By accessing, the presence or absence of a failure of the control target devices 202-1 to 202-n is detected. If there is a failure, the alarm collection unit 214 outputs failure information indicating the failure to the message assembly unit 215. When the message assembly unit 215 acquires the failure information from the alarm collection unit 214, the message assembly unit 215 generates a failure information message indicating the failure information. When a failure occurs, the message generated by the message assembling unit 215 stores “failure information” in the message type field shown in FIG. 2 and stores information on the failure in the data field.
- the P / S unit 216 converts the response message or failure information message received from the message assembly unit 215 from parallel data to serial data, and outputs the converted serial data to the serial bus 30.
- This response message or failure information message is transmitted from the card 20 to the card 10 via the serial bus 30 and received by the S / P conversion unit 115 of the card 10.
- the S / P unit 115 converts this message from serial data to parallel data, and outputs the converted parallel data message to the message determination unit 116.
- the message determination unit 116 determines from the message type field of the message acquired from the S / P unit 115 whether the received message is a response message for writing / reading or a failure information message. Further, if the message returned from the card 20 is a response message, the message determination unit 116 identifies whether it is a response to writing or a response to reading.
- the message determination unit 116 stores the access result (write correct / no-write, read data) stored in the data field of the message in the register unit 112.
- the message determination unit 116 stores the failure information stored in the data field of the message in the register unit 112.
- the message determination unit 116 outputs a write response, a read response (read data), or failure notification information to the register unit 112 according to the content of the message received from the card 20, and the arrival or failure of the response message.
- the arrival of the message is individually notified to the host CPU 101.
- the host CPU 101 When the notification from the message determination unit 116 indicates the result of the write access, the host CPU 101 reads the result of the write access from the register unit 112 via the bus interface 111. On the other hand, when the notification from the message determination unit 116 indicates the result of the read access, the host CPU 101 reads the read data from the register unit 112 via the bus interface 111. On the other hand, when the notification from the message determination unit 116 indicates a failure notification, the host CPU 101 reads out the failure information stored in the register unit 112 via the bus interface 111 and performs failure processing according to the content of the failure information. .
- the failure processing includes, more specifically, separation of a card in which a failure is detected, and switching of a card when there is a redundant card having overlapping functions.
- the access control unit 213 includes an access control receiving unit 300 and message areas 301-1 to 301-n for storing read data from the control target devices 202-1 to 202-n.
- the access control receiving unit 300 receives the processing results for the controlled devices 202-1 to 202-n and writes the received processing results in the message areas 301-1 to 301-n, respectively.
- access responses are stored in the message areas 301-1 to 301-n.
- the single access responses are stored in the message areas 301-1 to 301-n after the burst access response is converted into a single access response. For example, when n pieces of data are burst accessed, the burst access response is converted into n single access responses, and the response data is stored in n message areas 301-1 to 301-n, respectively. .
- the alarm collection unit 214 includes a failure information reception unit 400 and a status area 401.
- the failure information reception unit 400 receives failure information from the control target devices 202-1 to 202-n and writes the received failure information in the status area 401. Further, when the failure information receiving unit 400 receives the failure information, the failure information receiving unit 400 outputs interrupt information indicating that the failure information has been received to the message assembling unit 215.
- the status area 401 stores failure information.
- the message assembling unit 215 organizes the conflict between the storage of data on the message areas 301-1 to 301-n of the access control unit 213 and the storage of data on the status area 401 of the alarm collection unit 214. When this occurs, priority is given to storage of data on the status area 401. For this reason, when the message assembling unit 215 receives the interrupt information indicating that the failure information is collected from the failure information receiving unit 400 during the collection of data from the message areas 301-1 to 301-n, the message area 301- The collection from 1 to 301-n is stopped, the data is collected from the status area 401, and the failure information message is generated. When the generation of the failure information message is completed and the failure information message is output to the P / S unit 216, the message assembling unit 215 retrieves data from the message areas 301-1 to 301-n again.
- the message assembly unit 215 autonomously generates a failure information message.
- This failure information message is sent from the card 20 to the card 10 via the serial bus 30 with priority over the response message, and information on the failure of the control target device is stored in the register unit 112.
- the host CPU 101 can detect the failure of the control target device only by reading the register unit 112 without accessing the card 20.
- the failure information is transmitted from the card 20 to the card 10, but the present invention can also be used when information other than the failure information is transmitted.
- the present invention can also be used to transmit line failure / recovery information and line quality (bit error, etc.) information to the card 10. Also in this case, since the host CPU 101 can acquire information only by reading the register unit 112, the processing time can be shortened.
- the present invention provides, for example, a bus control configured such that a master-side circuit part on which a host CPU is mounted and a slave-side circuit part on which a control target device is mounted communicate with each other via a serial bus. Can be used for equipment.
- the host CPU can quickly acquire the failure information of the slave circuit, and the time required for the failure processing can be shortened.
- Serial bus 101 Host CPU 102: Master side bus conversion circuit 111: Bus interface 112: Register unit 113: Message assembly unit 116: Message determination unit 201: Slave side bus conversion circuits 202-1 to 202-n: Control target device 212: Message decomposition unit 213: Access control unit 214: Alarm collection unit 215: Message assembly unit
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Abstract
Description
カード20(スレーブ回路)は、制御対象デバイス202-1~202-n(制御対象)を含むスレーブ側の電子回路が搭載された回路パーツである。制御対象デバイス202-1~202-nは、EEPROM(Electrically Erasable and Programmable Read Only Memory)やフレーマ等のデバイスである。
カード10とカード20とは、バックワイヤリングボード(図示せず)経由で接続されており、シリアルバス30を介して互いにメッセージを送受信することでアクセスを行う。
シリアルバス30を用いた通信では、データの送信と受信とが物理的に分離されている。すなわち、シリアルバス30は、カード10からカード20へのメッセージの送信に用いる回線とカード20からカード10へのメッセージの送信に用いる回線とを別個に備える。カード10とカード20との間では、シリアルバス30を介して図2に示すようなフォーマットのメッセージを送受信する。
メッセージ種別のフィールドには、当該メッセージが、読み出し、書き込み、または障害情報のいずれのメッセージであるかを示す識別子が格納される。
アクセスタイプのフィールドには、当該メッセージによるアクセスがシングルアクセスなのかバーストアクセスなのかを示すタイプが格納される。
アクセス先アドレスのフィールドには、読み出し/書き込みを行うアドレスが格納される。なお、このアドレスは、バーストアクセスが指定されている場合には、バーストアクセスの先頭アドレスとなる。
データのフィールドには、書き込みアクセスの場合には指定されたアドレスに書き込まれるデータが格納され、読み出しアクセスの場合には指定されたアドレスから読み出されたデータが格納され、障害通知の場合は障害に関する情報が格納される。
そして、スレーブ側バス変換回路201は、分解されたメッセージのメッセージ種別に応じて、配下に接続される制御対象デバイス202-1~202-nへのアクセスを行う。また、スレーブ側バス変換回路201は、制御対象デバイス202-1~202-nの応答データからメッセージを組み立て、この組み立てたメッセージをマスタ側バス変換回路102に出力する。さらに、スレーブ側バス変換回路201は、制御対象デバイス202-1~202-nで発生した障害に関する障害情報を収集すると、この障害情報から障害情報メッセージを組み立て、この障害情報メッセージをマスタ側バス変換回路102に出力する。
図1において、カード10に搭載されているホストCPU101が、カード20に搭載されている制御対象デバイス202-1~202-nに対して制御を行う場合、ホストCPU101は、バスインタフェース111を介して、レジスタ部112にアクセス情報(読み出し/書き込み種別、アクセス先のアドレス、書き込みの場合には書き込みデータ)を設定する。レジスタ部112は、アクセス情報が設定されると、メッセージ組立部113に対してアクセス情報を出力する。レジスタ部112からアクセス情報が出力されると、メッセージ組立部113は、図2に示すようなフォーマットのアクセスメッセージを生成し、生成されたアクセスメッセージをP/S部114に出力する。次に、P/S部114は、シリアルバス30のシリアルバスインタフェースに合致するように、このアクセスメッセージをパラレルデータからシリアルデータに変換して、シリアルデータのアクセスメッセージをシリアルバス30に送出する。このアクセスメッセージは、シリアルバス30を介して、カード10からカード20に送信され、カード20のS/P変換部211で受信される。
メッセージ組立部215は、アラーム収集部214から障害情報を取得すると、当該障害情報を示す障害情報メッセージを生成する。障害が発生した場合、メッセージ組立部215が生成するメッセージには、図2に示すメッセージ種別のフィールドに「障害情報」が格納され、データフィールドに障害に関する情報が格納される。
アクセス制御受信部300は、制御対象デバイス202-1~202-nに対する処理結果を受信し、受信した処理結果をメッセージエリア301-1~301-nにそれぞれ書き込む。
メッセージエリア301-1~301-nには、アクセス応答が格納される。なお、バーストアクセスの場合には、メッセージエリア301-1~301-nには、バーストアクセスの応答をシングルアクセスの応答に変換した後に、これらシングルアクセスの応答が格納される。例えば、n個のデータをバーストアクセスした場合には、バーストアクセスの応答がn個のシングルアクセスの応答に変換され、n個のメッセージエリア301-1~301-nにそれぞれ応答データが格納される。
障害情報受信部400は、制御対象デバイス202-1~202-nから障害情報を受信し、受信した障害情報をステータスエリア401に書き込む。また、障害情報受信部400は、障害情報を受信した場合、メッセージ組立部215に障害情報を受信したことを示す割り込み情報を出力する。
ステータスエリア401には、障害情報が格納される。
30:シリアルバス
101:ホストCPU
102:マスタ側バス変換回路
111:バスインタフェース
112:レジスタ部
113:メッセージ組立部
116:メッセージ判定部
201:スレーブ側バス変換回路
202-1~202-n:制御対象デバイス
212:メッセージ分解部
213:アクセス制御部
214:アラーム収集部
215:メッセージ組立部
Claims (6)
- 制御部が搭載されるマスタ回路と、
制御対象を搭載し、前記マスタ回路とメッセージ通信を行うスレーブ回路と、
前記マスタ回路と前記スレーブ回路を接続するバスと
を具備し、
前記マスタ回路は、前記制御対象にアクセスするためのアクセスメッセージを生成するマスタ側メッセージ生成部と、前記アクセスメッセージを前記スレーブ回路に送信するマスタ側送信部とを有し、
前記スレーブ回路は、前記制御対象の情報を収集する収集部と、前記アクセスメッセージに対する応答メッセージを生成すると共に前記制御対象の情報に基づく情報メッセージを生成するスレーブ側メッセージ生成部と、前記応答メッセージおよび前記情報メッセージを前記マスタ回路に送信するスレーブ側送信部とを有し、
前記スレーブ側メッセージ生成部は、前記応答メッセージの生成と前記情報メッセージの生成とが競合する場合、前記情報メッセージを優先して生成する
バス制御装置。 - 前記マスタ回路は、前記スレーブ回路から受信したメッセージを保持する記憶部を有し、
前記制御部は、前記記憶部に保持された前記メッセージに基づいて前記制御対象の情報を取得する請求項1に記載のバス制御装置。 - 前記収集部は、前記制御対象からの割り込み通知に従って前記制御対象の情報を収集する請求項1又は2に記載のバス制御装置。
- 前記収集部は、前記制御対象に周期的にアクセスして前記制御対象の情報を収集する請求項1又は2に記載のバス制御装置。
- 前記収集部は、前記制御対象の情報を取得したことを示す割り込み情報を前記スレーブ側メッセージ生成部に出力し、
前記スレーブ側メッセージ生成部は、前記応答メッセージの生成中に前記割り込み情報を受信すると、前記応答メッセージの生成を停止して前記情報メッセージを生成した後に、改めて前記応答メッセージの生成を行う
請求項1から請求項4の何れか1項に記載のバス制御装置。 - 制御部が搭載されるマスタ回路が、バスを介して前記マスタ回路と接続するスレーブ回路に搭載される制御対象にアクセスするためのアクセスメッセージを生成し、前記スレーブ回路に対して前記アクセスメッセージを送信し、
前記スレーブ回路が、前記制御対象の情報を収集し、前記アクセスメッセージに対する応答メッセージを生成すると共に前記制御対象の情報に基づく情報メッセージを生成し、前記応答メッセージおよび前記情報メッセージを前記マスタ回路に送信し、
前記スレーブ回路は、前記応答メッセージの生成と前記情報メッセージの生成とが競合する場合には、前記情報メッセージを優先して生成する
バス制御方法。
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EP11783475.4A EP2574012A4 (en) | 2010-05-21 | 2011-05-16 | BUS CONTROL DEVICE AND BUS CONTROL METHOD |
JP2012515869A JP5418670B2 (ja) | 2010-05-21 | 2011-05-16 | バス制御装置及びバス制御方法 |
CN201180023005.0A CN102884776B (zh) | 2010-05-21 | 2011-05-16 | 总线控制装置及总线控制方法 |
US13/697,977 US20130067130A1 (en) | 2010-05-21 | 2011-05-16 | Bus control apparatus and bus control method |
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JP5637145B2 (ja) * | 2009-11-26 | 2014-12-10 | 日本電気株式会社 | バスモニタ回路及びバスモニタ方法 |
CN114020679B (zh) * | 2021-11-12 | 2023-11-07 | 中国船舶集团有限公司第七一一研究所 | I2c总线控制电路及用于船舶的电路系统 |
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- 2011-05-16 EP EP11783475.4A patent/EP2574012A4/en not_active Withdrawn
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CN102884776A (zh) | 2013-01-16 |
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EP2574012A1 (en) | 2013-03-27 |
JPWO2011145541A1 (ja) | 2013-07-22 |
US20130067130A1 (en) | 2013-03-14 |
CN102884776B (zh) | 2016-06-22 |
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