JP4554255B2 - COMMUNICATION MONITOR DEVICE, COMMUNICATION MONITOR METHOD, AND PROGRAM - Google Patents

Description

  The present invention relates to a communication monitoring device, a communication monitoring method, and a program, and more particularly, to a communication monitoring device, a communication monitoring method, and a program connected to a serial communication network.

  In recent years, the number of electronic devices mounted on vehicles has increased, and vehicle LANs are widely used to prevent an increase in the number of wire harnesses connecting these electronic devices.

  CAN (Controller Area Network) is known as one of vehicle LANs. CAN is used as a communication system for control in many automobiles, and is also used for FA, ships, medical equipment and the like in addition to vehicles. For example, an engine control device, a transmission control device, ABS, dashboard meters, lights, a power window, and the like are connected by CAN.

  In a CAN, a communication unit such as an ECU (Electric Control Unit) is connected to a CAN bus, and messages are transmitted and received between the communication units via the CAN bus. Since the CAN is a multi-master system, all communication units can transmit messages when the CAN bus is free. The CAN also adopts a multicast method, and messages transmitted to the CAN bus are received simultaneously by all communication units.

  The CAN message is transmitted and received in a frame format on the CAN bus. FIG. 9 shows a format of a data frame which is one of CAN frames. The data frame is a frame for the communication unit to send data to the other communication unit. As shown in the figure, the data frame includes an SOF (Start Of Frame) field, an ID field, a data field, a CRC field, and an EOF (End Of Frame) field. In addition, a control field indicating the data length, an ACK field for confirmation of reception, and the like are included (not shown).

  The SOF field is a field indicating the start of a data frame, the ID field is a field indicating CANID for identifying data, the data field is a field including data contents, the CRC field is a field for checking transmission errors of the frame, and the EOF field is This field indicates the end of the data frame.

  Each communication unit does not have information such as an address, identifies a frame to be received by CANID, receives the corresponding frame, and performs necessary processing. Further, as described above, when the CAN bus is free, all communication units can transmit a message, so that a plurality of communication units may start transmission at the same time. In this case, the priority order is determined by the CANID of the frame to be transmitted. A smaller CANID value is treated as a higher priority frame. Only the communication unit that has transmitted the frame with the highest priority can continue transmission, and the other communication units stop transmission and perform reception processing.

  Conventionally, an oscilloscope has been used to debug and evaluate a communication unit connected to the CAN bus and monitor the communication state of the CAN bus. However, since it is difficult to analyze the frame with only the oscilloscope waveform, the efficiency of debugging etc. is poor, and if you are not an expert, the waveform is often read incorrectly, and the quality of debugging can be guaranteed. Can not. Therefore, a communication monitoring device that monitors CAN bus communication is used.

  FIG. 10 shows a block diagram of a conventional communication monitoring apparatus. The communication monitor device 900 is connected to the CAN bus 970 and can monitor a communication of the CAN bus 970 and can transmit a desired message to the CAN bus 970.

  As shown in the figure, the communication monitor device 900 includes an information storage unit 910, a communication monitor control unit 920, a message transmission unit 930, a message reception unit 940, a display unit 950, and an input unit 960. The information storage unit 910 stores transmission message information 911, transmission condition information 912, and a transmission state flag 913. The communication monitor control unit 920 includes a transmission condition determination unit 921, a monitor unit 922, and an information editing unit 923.

  The transmission message information 911 is information relating to a message to be transmitted and a transmission pattern, and includes data constituting the message and patterns such as the order and period of transmitting the message. The transmission message information 911 includes a plurality of message information and one transmission pattern.

  The transmission condition information 912 is information regarding a condition for transmitting a message, and includes a transmission start condition and a transmission stop condition of the transmission pattern of the transmission message information 911. The transmission condition information 912 includes transmission conditions for one transmission pattern (including a transmission start condition and a transmission stop condition).

The transmission state flag 913 is a flag indicating the transmission state of the message, and indicates whether or not the message associated with the transmission pattern of the transmission message information 911 is being transmitted. The transmission status flag 913 includes a transmission status flag of a message associated with one transmission pattern.

The transmission condition determination unit 921 receives various events, determines whether the event matches the transmission start condition or the transmission stop condition of the transmission condition information 912, and refers to the transmission state flag 913. For example, if the event matches the transmission start condition and the message associated with the transmission pattern is in an untransmitted state, the message associated with the transmission pattern is sent to the CAN bus 970 via the message transmission unit 930. Send.

  The monitor unit 922 analyzes the message received from the CAN bus 970 via the message receiving unit 940 and displays it from the display unit 950. The information editing unit 923 accepts input from the user via the input unit 960, and adds, updates, etc. with respect to the information in the information storage unit 910.

  With such a configuration, communication of the CAN bus 970 can be monitored, and a message can be transmitted according to user-desired conditions and patterns. However, since the conventional communication monitoring apparatus stores only one transmission condition as the transmission condition information 912, a message can be transmitted only with one transmission pattern associated with the transmission condition. That is, there is a problem that transmission can be performed only with a simple pattern, such as one cycle according to one transmission condition.

Further, in the conventional communication monitoring apparatus, when information is edited by the information editing unit 923, it is necessary to stop the processing of the monitor unit 922 and the transmission condition determination unit 921 in order to avoid complicated processing. That is, there is a problem that other operations such as monitoring operation and information input cannot be performed simultaneously. For this reason, when transmission of messages associated with multiple transmission patterns is started at each timing, the monitoring operation cannot be realized unless the monitoring operation is temporarily stopped and the monitoring operation is restarted after resetting the pattern to be used. In addition to being complicated and adding real-time properties, inevitably, only one pattern can be used .

  In addition, there are devices that are capable of sending and receiving complex messages equivalent to actual EUC modules using a unique programming language as a development support device that has higher functionality than such a communication monitoring device. Learning and technical support from the distributor are necessary.

Patent Document 1 is known as a conventional CAN communication diagnostic apparatus.
Japanese Patent Laid-Open No. 2003-244779

  As described above, the conventional communication monitoring apparatus has a problem that a message can be transmitted only with a simple transmission pattern, and a monitor operation and other operations such as information input cannot be performed simultaneously. It was.

  The present invention has been made to solve such problems, and an object of the present invention is to enable transmission of a message with a complicated transmission pattern, and to enable other operations during the monitoring operation. That is.

The program according to the present invention is a program for causing a computer to execute a process of transmitting a plurality of transmission messages to a serial communication network according to a transmission pattern , wherein the process includes a transmission start condition included in each of the plurality of transmission patterns. A first process for obtaining the first transmission pattern based on the plurality of transmission start conditions, a second process for determining at least one first transmission pattern to start transmission from the plurality of transmission patterns , and the first transmission pattern fourth process for transmitting from the plurality of transmission message associated with the third and the process of determining the transmission message to be transmitted, the transmission message determined by said third process to said serial communication network If, while the transmission by the first transmission pattern is being performed, the processing and the fifth repeating said third process, the Obtain. Thereby, a message can be transmitted by a transmission pattern selected from a plurality of transmission patterns.

In the above program, and a sixth process of obtaining a transmission stop condition included in each of the plurality of transmission patterns, based on said plurality of transmission stop condition, the transmitting stop from a plurality of the first transmission pattern 2 And a seventh process for determining the transmission pattern, and an eighth process for canceling the fifth process for the second transmission pattern . Thereby, message transmission can be stopped by a transmission pattern selected from a plurality of transmission patterns.

In the above-described program, the step of repeating the step of determining the message to be transmitted may repeat the step of determining the message to be transmitted for a plurality of messages included in a plurality of transmission patterns. Thereby, a message can be transmitted by a plurality of transmission patterns selected from a plurality of transmission patterns.

In the above-described program, the transmission pattern includes data representing a cycle in which the transmission pattern is repeated, and the fifth process performs the third process at a transmission timing determined by the data representing the period. It may be repeated. As a result, a message can be transmitted using a complicated transmission pattern.

In the above program, the transmission pattern includes, for each of a plurality of messages included in the transmission pattern, data representing a transmission interval until the next message after message transmission is transmitted, and the fifth process May repeat the third process at a transmission timing determined by data representing the transmission interval. As a result, a message can be transmitted using a complicated transmission pattern.

In the above-described program, when the transmission timing overlaps for a plurality of messages, the third process may determine a message to be transmitted based on data included in the plurality of messages. Thereby, it is possible to efficiently transmit a message with a complicated transmission pattern.

The above program may further include a ninth process for receiving a message from the serial communication network and a tenth process for displaying the received message. Thereby, it is possible to perform a monitoring operation and transmit a message with a complicated transmission pattern.

  In the above program, the serial communication network may be a CAN communication network. Thereby, it is possible to transmit a message with a complicated transmission pattern in the CAN communication network.

In the above-described program, when the transmission timing overlaps for a plurality of messages, the third process may determine a message to be transmitted based on a CANID included in the plurality of messages. Thereby, it is possible to efficiently transmit a message with a complicated transmission pattern.

A communication monitoring method according to the present invention is a communication monitoring method for transmitting a plurality of transmission messages to a serial communication network according to a transmission pattern, the first step of receiving a message from the serial communication network, and displaying the received message a second step of, acquiring the plurality of transmission patterns, a third step of obtaining the transmission start condition included in each of the plurality of transmission patterns, based on said plurality of transmission start condition, said plurality of a fourth step of determining at least one first transmission pattern starts transmitted from the transmission pattern, from a plurality of transmission message associated with the first transmission pattern, the determining the transmission message to be transmitted 5 steps and, said transmission message determined by said fifth step to the serial communication network A sixth step of signal, while the transmission by the first transmission pattern is performed, in which and a seventh step of repeating the fifth step. Thereby, it is possible to perform a monitoring operation and transmit a message with a complicated transmission pattern.

A communication monitoring device according to the present invention is a communication monitoring device for transmitting a plurality of transmission messages to a serial communication network according to a transmission pattern , wherein the first means for receiving a message from the serial communication network and displaying the received message second means for, acquiring the plurality of transmission patterns, and the third means for acquiring a transmission start condition contained in each of the plurality of transmission patterns, based on the plurality of transmission start condition, said plurality of and fourth means for determining at least one first transmission pattern starts transmitted from the transmission pattern, from a plurality of transmission message associated with the first transmission pattern, the determining the transmission message to be transmitted 5 means, and sixth means for transmitting the transmission message which is determined by the fifth means to said serial communication network, before While the transmission by the first transmission pattern is performed, in which and a seventh means for repeating the processing by said fifth means. Thereby, it is possible to perform a monitoring operation and transmit a message with a complicated transmission pattern.

  According to the present invention, it is possible to provide a communication monitoring device, a communication monitoring method, and a program that can transmit a message with a complicated transmission pattern and can perform other operations during the monitoring operation.

Embodiment 1 of the Invention
First, the configuration of a communication system including a communication monitoring apparatus according to the first embodiment of the present invention will be described using FIG. As shown in the figure, this communication system includes a communication monitoring device 1 and a plurality of communication units 2, and communication between the communication monitoring device 1 and each communication unit 2 is performed via CAN buses 3a and 3b. Connected as possible. In this example, three communication units 2 are provided. However, the present invention is not limited to this, and an arbitrary number of communication units 2 may be provided.

  This communication system is, for example, a LAN provided in a vehicle such as an automobile, and CAN is used as a communication protocol. The CAN buses 3a and 3b are buses for performing communication according to the CAN protocol, and a bus-type network is constructed by the CAN buses 3a and 3b.

  The CAN bus 3a and the CAN bus 3b are used for different communication speeds and different applications. For example, the communication speed of the CAN bus 3a is set to 83 kbps and used as an information network such as a meter or an air conditioner. The communication speed of the CAN bus 3b is set to 1 Mbps and used as a control network such as engine control or transmission control. Available. In the example of the figure, the same communication unit 2 is connected to the CAN buses 3a and 3b, but different communication units 2 are connected depending on the application. Note that the number of CAN buses is not limited to two, but may be one, or any other number of CAN buses may be provided.

  The communication unit 2 is a communication device capable of communication according to the CAN protocol. The communication unit 2 is, for example, an ECU, and is a control device such as an engine, transmission, ABS, dashboard meters, and a power window.

  The communication monitoring device 1 is a device that monitors communication on the CAN buses 3a and 3b. In addition to monitoring messages communicated by the communication unit 2, the communication monitoring device 1 can simultaneously process a plurality of transmission patterns and transmit a message to the communication unit 2 at the timing of the plurality of transmission patterns. . As shown in the figure, the communication monitoring device 1 includes a CPU 101 that executes various control processes and a CAN controller 102 that performs communication control according to the CAN protocol.

  Next, the configuration of the communication monitoring apparatus according to the present embodiment will be described using the block diagram of FIG. The communication monitoring apparatus 1 is configured by a computer such as a personal computer or a server computer, and each block in the figure is configured by hardware or software executed on the hardware. Note that the communication monitor device 1 may be configured by a plurality of computers, not by a single computer.

  As shown in the figure, the communication monitor device 1 includes an information storage unit 110, a communication monitor control unit 120, a message transmission unit 130, a message reception unit 140, a display unit 150, and an input unit 160.

  The information storage unit 110 stores information related to processing of the communication monitor control unit 120. As shown in the figure, the information storage unit 110 stores transmission message information 111, transmission condition list information 112, transmission waiting pattern information 113, and transmission waiting message information 114. The information storage unit 110 includes, for example, an internal storage device such as a hard disk or an external storage device such as an optical disk. In addition, the information storage unit 110 stores an OS program, an application program, various data necessary for processing each program, and the like.

  The transmission message information 111 is information about a message to be transmitted and a transmission pattern, and can be realized by a list structure including a plurality of transmission messages and a plurality of transmission patterns, for example. The transmission message information 111 includes data stored in a file format defined by the communication monitor device 1 and data directly input from the user via the input unit 160. The transmission message information 111 includes a plurality of transmission patterns, and an example of data will be described later.

  The transmission condition list information 112 is information related to the transmission condition of the transmission pattern, and includes the transmission pattern start condition and the stop condition of the transmission message information 111. Similarly to the transmission message information 111, the transmission condition list information 112 is stored by input from the user via the input unit 160 or the like. The transmission condition list information 112 can be realized by a list structure, for example, and stores transmission start conditions and transmission stop conditions for each transmission pattern of the transmission message information 111. An example of data of the transmission condition list information 112 will be described later.

  The transmission wait pattern information 113 is information related to a transmission pattern during transmission processing, and includes a transmission pattern cycle, the number of times, and the like. The transmission wait pattern information 113 can be realized, for example, in a list structure, and is registered at the start of the transmission pattern transmission process and deleted at the end of the transmission process. The transmission wait pattern information 113 is registered or deleted by the transmission data scheduling unit 124. An example of data of the transmission waiting pattern information 113 will be described later.

  The transmission waiting message information 114 is information related to a transmission message being transmitted, and includes a transmission message cycle, the number of times, and the like. The transmission waiting message information 114 can be realized, for example, in a list structure, and is registered at the start of transmission processing of a transmission message and deleted at the end of transmission processing. The transmission waiting message information 114 is registered or deleted by the transmission data scheduling unit 124. An example of the data of the transmission waiting message information 114 will be described later.

  As shown in the figure, the communication monitor control unit 120 includes a transmission state monitoring unit 121, a transmission condition determination unit 122, a transmission pattern selection unit 123, a transmission data scheduling unit 124, a monitor unit 125, and an information editing unit 126. ing. The communication monitor control unit 120 is configured by, for example, a software program stored in the information storage unit 110 being expanded on a memory, the CPU 101 performing processing according to the software program, and cooperating with other hardware configurations. Yes.

The transmission state monitoring unit 121 monitors the transmission state of messages according to a certain transmission pattern transmitted from the communication monitoring device 1 to the CAN buses 3a and 3b. For example, transmission status monitoring unit 121 in response to an inquiry from the transmission condition judgment unit 122, by referring to the transmission waiting pattern information 113, to determine the transmission status of the message by the transmission pattern, the transmission condition judgment unit 122 Returns the judgment result.

The transmission condition determination unit 122 receives various events and determines whether there is a transmission condition corresponding to the event. For example, the transmission condition determination unit 122 accepts an event such as a key input by the user from the input unit 160 and a message reception from the CAN buses 3a and 3b, and whether the transmission condition of the transmission condition list information 112 matches the event. Judge whether or not. Further, the transmission condition determination unit 122 inquires the transmission state monitoring unit 121 about the transmission state regarding the transmission pattern that matches the transmission condition, and notifies the transmission pattern selection unit 123 of the transmission pattern based on the inquiry result.

  The transmission pattern selection unit 123 acquires information about the notified transmission pattern and information about a transmission message included in the transmission pattern. For example, for the transmission pattern notified from the transmission condition determination unit 122, the transmission pattern selection unit 123 uses the transmission condition list information 112 and the transmission message information 111, information about the transmission pattern, and a plurality of messages constituting the transmission pattern. The information regarding is acquired and notified to the transmission data scheduling unit 124.

Further, if the determination result of the transmission condition judgment unit 122 of the start of a message transmission by transmitting pattern, a start of message transmission by the transmission pattern, and notifies the transmission data scheduling unit 124, the determination of the transmission condition judgment unit 122 results in case of stopping of the message transmission by the transmitting pattern, a stop message transmitted by the transmission pattern, and notifies the transmission data scheduling unit 124.

  The transmission data scheduling unit 124 performs transmission start or transmission stop processing on the notified transmission pattern and transmission message. For example, the transmission data scheduling unit 124 registers the transmission pattern for starting transmission in the transmission waiting pattern information 113 and deletes the transmission pattern for stopping transmission from the transmission waiting pattern information 113. Also, based on the transmission pattern registered in the transmission waiting pattern information 113, the message to be transmitted is registered in the transmission waiting message information 114, and the timing is adjusted based on the transmission message registered in the transmission waiting message information 114, The transmission message is notified to the message transmission unit 130.

  The monitor unit 125 analyzes messages received from the CAN buses 3 a and 3 b via the message receiving unit 140 and displays them from the display unit 150. Since the message transmitted from the message transmitting unit 130 is also received from the CAN buses 3a and 3b, the transmitted message is also displayed. The monitor unit 125 may display all received messages, or may display only specific messages by filtering with CANID or the like.

  The information editing unit 126 receives an input from the user via the input unit 160, and adds, updates, etc. the information in the information storage unit 110.

  The message transmission unit 130 transmits the transmission message of the communication monitor control unit 120 to the CAN buses 3a and 3b. For example, information on a transmission message including CANID and data is received from the communication monitor control unit 120, the information on the transmission message is written into a register of the CAN controller 102, and the transmission message is transferred to the CAN buses 3a and 3b by the CAN controller 102. Sent.

  The message receiving unit 140 receives messages from the CAN buses 3a and 3b. For example, the CAN controller 102 receives a message from the CAN buses 3a and 3b, and the message receiving unit 140 receives an interrupt from the CAN controller 102, reads the received message from the register of the CAN controller 102, and communicates the received message. The monitor control unit 120 is notified.

  The input unit 160 receives information related to processing of the communication monitor control unit 120 input from the user. For example, input information from the user is received via an input device such as a keyboard or a mouse, and the input information is output to the communication monitor control unit 120. The display unit 150 displays information related to processing performed by the communication monitor control unit 120. For example, a monitor result or the like is received from the communication monitor control unit 120 and the information is displayed on a display device such as a CRT or LCD.

  Next, information stored in the communication monitoring apparatus according to the present embodiment will be described with reference to FIGS. 3 and 4. 3A is an example of transmission message information 111, FIG. 3B is a transmission condition list information 112, FIG. 4A is a transmission waiting pattern information 113, and FIG. 4B is an example of data of transmission waiting message information 114. Is shown. Note that these data are examples, and other data may be used as long as they can be processed in the processing in the communication monitor control unit 120 described later.

  As shown in FIG. 3A, the transmission message information 111 includes a transmission pattern name for identifying a transmission pattern, a transmission message name for identifying a transmission message, and a bus type for identifying a bus for transmitting the message. The frame type for identifying the format of the transmission message, the CAN ID included in the ID field of the transmission message, the data included in the data field of the transmission message, and the transmission interval of the transmission message are included. The transmission message information 111 is stored in the information storage unit 110 in which a plurality of transmission messages are associated with each transmission pattern, and CANID, data, and the like are associated with each transmission message. In addition, the transmission message information 111 may include the number of transmissions for each message.

  The transmission pattern name and the transmission message name only need to identify the transmission pattern and the transmission message, and the data format to be stored is not limited. The same applies to the transmission condition list information 112 and the like.

  The bus type stores data for identifying the connected CAN buses 3a and 3b. When there is one CAN bus to be connected, or when a CAN bus to be transmitted by CANID or the like is determined in advance, the bus type column need not be provided.

  The frame type stores data representing a standard format or an extended format. The standard format and the extended format are defined by the CAN protocol. In the standard format, the CANID is 11 bits, and in the extended format, the CANID is 29 bits. In addition, an error frame and a bit string frame can be stored in the frame type. In the case of an error frame, a CANID or data frame that does not follow the CAN protocol can be set. In the case of a bit string frame, the frame can be set by bit designation.

  In the CANID, an ID in a range corresponding to the frame type is stored, and in the data, for example, data having a length of 0 to 8 bytes is stored. Further, since the data length is variable, it is preferable that the data length corresponding to the control field is included in the CANID.

The transmission interval is a transmission interval with the message transmitted immediately before in the transmission pattern. If it is the first message of a transmission pattern, it will become the space | interval with the transmission start of the message transmitted by a transmission pattern. The transmission message is transmitted at every transmission interval, and this is repeated within the transmission pattern. In the example of transmission pattern 1 in the figure, when transmission of a message according to transmission pattern 1 is started, first, message A is transmitted after 10 msec, then message B is transmitted after 30 msec, then message C is transmitted after 25 msec, Thereafter, transmission from the message A is further repeated.

  As shown in FIG. 3B, the transmission condition list information 112 includes a transmission pattern name for identifying a transmission pattern, a transmission pattern transmission start condition, a transmission pattern transmission cycle, and a transmission pattern transmission stop condition. The information is stored in the information storage unit 110 in association with each other.

In the transmission start condition, the type of the key to be input is stored, and in the transmission stop condition, the number of times the message corresponding to the input key type and the transmission pattern is repeatedly transmitted can be stored. The transmission start condition and the transmission stop condition are not limited to this example, and various events that can be received by the communication monitor control unit 120 are stored. For example, clicking with a mouse, receiving a predetermined message, starting or stopping a predetermined program, interrupting a protocol error from the CAN controller 102, a transceiver provided between the CAN controller 102 and the CAN buses 3a and 3b, etc. It is also possible to use an external interrupt or the like as a condition.

The transmission cycle stores a cycle for repeating the transmission pattern. In the example of the transmission pattern 1 in the figure, when the key “1” is pressed, the transmission of the message according to the transmission pattern 1 is started, and the transmission messages of FIG. 3A are sequentially transmitted, and this is repeated at a cycle of 80 msec. Further, when the key “Esc” is pressed, transmission is stopped. The transmission condition list information 112 and the transmission message information 111 may be associated with each other in a list structure such as a pointer. By associating the transmission condition list information 112 with the transmission message information 111, it is possible to improve the capacity of data and the efficiency of search processing.

As shown in FIG. 4A, the transmission waiting pattern information 113 includes a transmission pattern name for identifying a transmission pattern, a next transmission time that is a time for transmitting a message corresponding to the transmission pattern, and a transmission pattern. The message transmission period corresponding to the transmission pattern , the number of transmissions of the message corresponding to the transmission pattern already transmitted, the number of transmissions of the message corresponding to the transmission pattern , and the transmission message are included. Note that the same information as the transmission message information 111 and the transmission condition list information 112 may not be stored in the transmission waiting pattern information 113.

The next transmission time stores the time until the next message corresponding to the transmission pattern is transmitted. In this example, the message corresponding to the transmission pattern 1 is transmitted after 10 msec. For example, when a transmission pattern is newly registered in the transmission waiting pattern information 113, 0 msec is stored in the next transmission time in order to start transmission immediately after registration. The next transmission time is not limited to this example, and may be a transmission time or the like. Further, the same information as that in FIG. 3B is stored in the transmission cycle.

  The number of times of transmission is counted once when all messages of the transmission pattern are transmitted and transmission processing of one pattern is completed. The number of transmitted times may be counted only for transmission patterns whose transmission number is a transmission stop condition, or may be counted for all transmission patterns. "-" In the figure indicates that no number of times is stored. The number of transmissions is the number of transmissions stored in the transmission stop condition of FIG.

  The message stored in the transmission message may be the name of the transmission message, but is preferably in a format that can be transmitted immediately for efficient transmission. That is, it is a format that can be directly written in the register of the CAN controller 102. For example, CANID and data of the transmission message information 111 are included.

  As shown in FIG. 4B, the transmission waiting message information 114 includes a transmission message, a bus type for transmitting the message, a next transmission time for transmitting the transmission message next, a transmission interval of the transmission message, and a transmission pattern name. include.

  In the transmission message, one of the transmission messages stored in the transmission waiting pattern information 113 is stored. The bus type is the same information as in FIG. 3A, but the transmission wait message information 114 may be different information for each bus type.

  The next transmission time is the time until the next transmission message is transmitted, similarly to the transmission waiting pattern information 113. In this example, the message A is transmitted after 1 msec. For example, when a transmission message is newly registered in the transmission waiting message information 114, since the message is transmitted after the transmission interval, the same value as the transmission interval is stored in the next transmission time. The transmission interval is the same information as the transmission message information 111.

  Next, processing of the communication monitoring apparatus according to the present embodiment will be described with reference to FIGS. 5 and 6. These processes are executed by the communication monitor control unit 120 by a predetermined application program or the like. For example, the processing of the communication monitor control unit 120 is executed in parallel by a plurality of tasks. By making each block of the communication monitor control unit 120 a separate task, it is possible to operate independently. For example, the process for monitoring an event and the process for transmitting a message are executed in different tasks. Hereinafter, event monitoring processing and message transmission processing will be described.

  The flowchart in FIG. 5 shows event monitoring processing in the communication monitor control unit 120. These processes are performed by the transmission state monitoring unit 121, the transmission condition determining unit 122, the transmission pattern selecting unit 123, and the transmission data scheduling unit 124.

  In this process, various events are constantly monitored. When an event occurs, the event is first accepted (S501). That is, the transmission condition determination unit 122 receives various events that have occurred. Here, the accepted event is an event that can be a transmission condition in the transmission condition list information 112, such as a key input.

  Next, it is determined whether a transmission condition corresponding to the event exists (S502). That is, the transmission condition determination unit 122 searches the transmission condition list information 112 to determine whether the event received in S501 corresponds to the transmission condition. Using the event as a search key, the transmission start condition and the transmission stop condition are searched for all transmission patterns in the transmission condition list information 112. At this time, when there are a plurality of corresponding transmission patterns, the subsequent processing is performed a plurality of times.

  If there is no transmission condition corresponding to the event in S502, the event is further monitored and S501 is performed. If there is a transmission condition corresponding to the event, S503 or S507 is executed depending on whether the transmission condition is a transmission start condition or a transmission stop condition.

  In S502, if the transmission condition corresponding to the event is a transmission start condition, it is determined whether or not the transmission pattern is being transmitted (S503). That is, the transmission condition determination unit 122 inquires of the transmission state monitoring unit 121 about the transmission state of the transmission pattern searched in S502. The transmission state monitoring unit 121 searches the transmission waiting pattern information 113 to determine whether or not the transmission pattern is being transmitted. Using the transmission pattern name of the transmission pattern as a search key, the transmission waiting pattern information 113 is searched. If there is a corresponding transmission pattern, the transmission process is in progress. If there is no corresponding transmission pattern, the transmission process is in progress. Judge that there is no. The transmission state monitoring unit 121 returns the determination result to the transmission condition determining unit 122.

  If it is determined in S503 that the transmission pattern is being transmitted, the event is further monitored, and S501 is performed. If the transmission condition corresponding to the event is the transmission start condition and the transmission pattern is already in transmission processing, there is no need to start transmission, so event monitoring is continued without doing anything.

  If it is determined in S503 that the transmission pattern is not being transmitted, the transmission pattern is acquired (S504). That is, the transmission condition determination unit 122 notifies the transmission pattern selection unit 123 of the transmission pattern that is determined not to be in the transmission process in S503. The transmission pattern selection unit 123 acquires information regarding the transmission pattern from the transmission condition list information 112 and the transmission message information 111. The transmission condition list information 112 and the transmission message information 111 are searched as a transmission pattern name and a search key of the transmission pattern. From the transmission condition list information 112, the transmission cycle and the number of transmissions of the transmission pattern, and the transmission message information 111 CANID, data, and the like of the transmission message constituting the transmission pattern are acquired.

  Next, a transmission message constituting the transmission pattern is generated (S505). The transmission pattern selection unit 123 generates a transmission message in a transmittable format from the information of the transmission messages that constitute the transmission pattern acquired in S504. A message in a predetermined format is generated from CANID and data. For example, the format can be written to the register of the CAN controller 102. At this time, the transmission message may be generated immediately before writing to the register of the CAN controller 102 without generating the transmission message.

  Next, the transmission pattern is registered in the transmission waiting pattern information 113 (S506). That is, the transmission pattern selection unit 123 notifies the transmission data scheduling unit 124 of the transmission pattern information acquired in S504 and the transmission message information generated in S505. The transmission data scheduling unit 124 registers the transmission pattern and transmission message information in the transmission wait pattern information 113. Thereafter, the event is further monitored, and S501 is performed. The transmission pattern and transmission message registered in the transmission waiting pattern information 113 are processed by a transmission monitoring process described later, and the message is transmitted.

  In S502, if the transmission condition corresponding to the event is a transmission stop condition, it is determined whether the transmission pattern is being transmitted (S507). That is, as in S503, the transmission condition determination unit 122 inquires the transmission state monitoring unit 121 about the transmission state of the transmission pattern searched in S502, and the transmission state monitoring unit 121 determines whether the transmission pattern is being processed for transmission. The transmission waiting pattern information 113 is searched and a determination is made.

  If it is determined in S507 that the transmission pattern is not in the transmission process, the event is further monitored, and S501 is performed. If the transmission condition corresponding to the event is the transmission stop condition and the transmission pattern is not already being transmitted, it is not necessary to stop the transmission, so the event monitoring is continued without doing anything.

  If it is determined in S507 that the transmission pattern is being transmitted, the transmission pattern is acquired (S508). That is, similarly to S504, the transmission condition determination unit 122 notifies the transmission pattern selection unit 123 of the transmission pattern that is determined to be transmission processing in S507, and the transmission pattern selection unit 123 transmits information on the transmission pattern. Obtained from the condition list information 112 and the transmission message information 111.

  Next, the transmission pattern is deleted from the transmission waiting pattern information 113 (S509). That is, similarly to S506, the transmission pattern selection unit 123 notifies the transmission data scheduling unit 124 of the transmission pattern information acquired in S508, and the transmission data scheduling unit 124 transmits the transmission pattern information. Delete from the waiting pattern information 113. At this time, if there is a transmission message constituting the transmission pattern in the transmission waiting message information 114, the transmission message is deleted. Thereafter, the event is further monitored, and S501 is performed. Further, since the transmission pattern and the transmission message deleted from the transmission waiting pattern information 113 are not processed by the transmission monitoring process described later, the transmission is stopped.

  The flowchart of FIG. 6 shows message transmission processing in the communication monitor control unit 120. These processes are processes in the transmission data scheduling unit 124.

  In this processing, the transmission waiting pattern and the transmission waiting message are constantly monitored, and the following processing is performed at a predetermined cycle such as 1 msec.

  First, it is determined whether there is a transmission pattern to be transmitted (S601). That is, the transmission data scheduling unit 124 searches the transmission waiting pattern information 113 for a transmission pattern that should start transmission at present. For example, a transmission pattern with a next transmission time of 0 msec is searched, and if there is a transmission pattern of 0 msec, it is determined that there is a transmission pattern to be transmitted.

  If it is determined in S601 that there is no transmission pattern to be transmitted, S603 is executed. If it is determined in S601 that there is a transmission pattern to be transmitted, a transmission message is registered in the transmission waiting message information 114 (S602). That is, the transmission data scheduling unit 124 registers the first transmission message in the transmission waiting message information 114 among the transmission messages constituting the transmission pattern searched in S601. When there are a plurality of transmission patterns to be transmitted, the transmission messages of all the transmission patterns are registered.

  Next, it is determined whether there is a message to be transmitted (S603). That is, the transmission data scheduling unit 124 searches the transmission waiting message information 114 for a transmission message to be currently transmitted. For example, a transmission pattern with a next transmission time of 0 msec is searched, and if there is a transmission pattern of 0 msec, it is determined that there is a message to be transmitted.

  If it is determined in S603 that there is no message to be transmitted, S601 is further performed. When returning to S601, a predetermined value such as a period of this processing, for example, 1 msec, is subtracted from the next transmission time of the transmission waiting pattern information 113 and the transmission waiting message information 114.

  If it is determined in S603 that there is a message to be transmitted, it is determined whether there are a plurality of messages to be transmitted (S604). That is, the transmission data scheduling unit 124 counts the number of transmission messages searched in S603 and determines whether there is one or a plurality of transmission messages.

  If it is determined in S604 that there are not a plurality of messages to be transmitted, S606 is performed. If it is determined in S604 that there are a plurality of messages to be transmitted, the CANIDs of the transmission messages are compared to determine the transmission order (S605). That is, the transmission data scheduling unit 124 compares the CANID values for the plurality of transmission messages determined in S604. Since the priority is higher when the value of CANID is smaller, the transmission messages are rearranged in order of increasing CANID. At this time, when the transmission message is registered in the transmission waiting message information 114 without determining the priority order, it may be registered according to the priority order.

  Next, the message is transmitted (S606). That is, the transmission data scheduling unit 124 outputs the transmission message to the message transmission unit 130 according to the order of the transmission message rearranged in S605. At this time, one transmission message may be output or a plurality of messages may be output.

  Next, the transmission waiting message information 114 and the transmission waiting pattern information 113 are reconstructed (S607). That is, the transmission data scheduling unit 124 deletes the transmission message transmitted in S606 from the transmission waiting message information 114. From the transmission wait pattern information 113, the transmission pattern of the transmission message is referred to, a transmission message to be transmitted next is acquired, and registered in the transmission wait message information 114. When the last message of the transmission messages constituting the transmission pattern is transmitted, the number of transmissions is incremented. When the number of times of transmission becomes equal to the number of times of transmission, the transmission pattern is deleted from the transmission waiting pattern information 113. Thereafter, S601 is further performed. When returning to S601, the next transmission time of the transmission waiting pattern information 113 and the transmission waiting message information 114 is subtracted by a predetermined value.

  Next, a specific example of operation will be described with reference to FIG. In the state where the two transmission patterns of FIG. 3B are set as the transmission patterns, the user performs key “8”, key “1”, key “1”, key “during monitoring operation of the CAN buses 3a and 3b. A case where the keys of the input unit 160 are pressed in the order of 2 "will be described.

  First, as an initial setting, the transmission message information 111 stores a plurality of messages in the two transmission patterns shown in FIG. 3A, and the transmission condition list information 112 has a key “1” as a transmission start condition. The key “Esc” and 10 times transmission are stored as “, key“ 2 ”and the transmission stop condition.

  After the monitoring operation of the CAN buses 3a and 3b is started, an event that “key“ 8 ”is pressed” is generated by a user operation, so that the transmission condition determination unit 122 transmits a transmission pattern using the key “8” as a transmission condition. Is searched from the transmission condition list information 112. Since the key “8” does not exist in the transmission condition list information 112, this event is ignored.

  Next, when an event “key“ 1 ”is pressed” is generated by a user operation, the transmission condition determination unit 122 determines whether or not there is a transmission pattern using the key “1” as a transmission condition from the transmission condition list information 112. Search for. Since the key “1” is a transmission start condition for transmission pattern 1, the transmission state monitoring unit 121 is inquired about the transmission state of transmission pattern 1. In this case, since the transmission state monitoring unit 121 is not a pattern in which the transmission pattern 1 is being transmitted, the transmission condition determination unit 122 responds to that effect, and the transmission condition determination unit 122 transmits the transmission pattern 1 to the transmission pattern selection unit 123. Notify that a transmission request has occurred.

  Next, the transmission pattern selection unit 123 receives the notification from the transmission condition determination unit 122, acquires the content of the transmission pattern 1 and the content of the transmission message A from the transmission condition list information 112 and the transmission message information 111, and transmits the transmission data / Notify the scheduling unit 124.

  Next, the transmission data scheduling unit 124 transmits the transmission acquired from the transmission pattern selection unit 123 to the current transmission state (in this case, nothing is registered in the transmission waiting pattern information 113 and the transmission waiting message information 114). Pattern 1 is registered in transmission waiting pattern information 113. The transmission data scheduling unit 124 registers the message A in the transmission waiting message information 114 based on the transmission pattern 1 registered in the transmission waiting pattern information 113, and after 10 msec, the message A is notified to the message transmission unit 130. Sent. Thereafter, the messages B and C are sequentially transmitted based on the transmission pattern 1 registered in the transmission waiting pattern information 113.

  Next, when an event “key“ 1 ”is pressed” is generated by a user operation, the transmission condition determination unit 122 determines whether or not there is a transmission pattern using the key “1” as a transmission condition from the transmission condition list information 112. Search for. Since the key “1” is the transmission condition of the transmission pattern 1, the transmission state monitoring unit 121 is inquired about the transmission state of the transmission pattern 1. In this case, since the transmission pattern 1 is registered in the transmission waiting pattern information 113 and the transmission state is being transmitted, the transmission state monitoring unit 121 responds to that effect, and the transmission condition determination unit 122 Ignore the event.

  Next, when an event “key“ 2 ”is pressed” occurs by a user operation 10 msec after message B is transmitted, the transmission condition determination unit 122 transmits a transmission pattern using the key “2” as a transmission condition. Is searched from the transmission condition list information 112. Since the key “2” is the transmission condition of the transmission pattern 2, the transmission state monitoring unit 121 is inquired about the transmission state of the transmission pattern 2. In this case, since the transmission pattern 2 is not a pattern in the state of being transmitted, the transmission state monitoring unit 121 responds to that effect, and the transmission condition determination unit 122 transmits the transmission pattern 2 to the transmission pattern selection unit 123. Notify that a transmission request has occurred.

  Next, the transmission pattern selection unit 123 receives the notification from the transmission condition determination unit 122, acquires the content of the transmission pattern 2 and the content of the transmission message D from the transmission condition list information 112 and the transmission message information 111, and transmits the transmission data / Notify the scheduling unit 124.

  Next, the transmission data scheduling unit 124 transmits the transmission acquired from the transmission pattern selection unit 123 to the current transmission state (in this case, the transmission pattern 1 is registered in the transmission waiting pattern information 113 and transmitted in a cycle of 80 msec). Pattern 2 is registered in transmission waiting pattern information 113. The transmission data scheduling unit 124

Based on the transmission pattern 2 registered in the transmission waiting pattern information 113, the message D is registered in the transmission waiting message information 114, and after 5 msec, the message D is notified to the message transmission unit 130 and transmitted. Thereafter, the messages E, F, G, H, and I are sequentially transmitted based on the transmission pattern 2 registered in the transmission waiting pattern information 113.

  In transmission data scheduling section 124, both transmission pattern 1 and transmission pattern 2 registered in transmission waiting pattern information 113 are scheduled and a message is transmitted. As a result, the result is as shown in FIG.

Thereafter, until the message transmission by transmission pattern 2 is performed 10 times, the transmission data scheduling unit 124 transmits the messages of transmission patterns 1 and 2 while monitoring the transmission cycle of each pattern and the transmission interval of each message. Schedule timing. After the transmission pattern 2 message is transmitted 10 times, the transmission data scheduling unit 124 schedules the transmission timing of only the transmission pattern 1 message.

With such a configuration, messages of a plurality of transmission patterns can be transmitted on the CAN bus with individual setting contents without stopping the monitoring operation. By storing the transmission conditions of a plurality of transmission patterns in the transmission condition list information 112, and scheduling the transmission timing of the order, interval, and period of each message included in each transmission pattern by the transmission data scheduling unit 124, A plurality of transmission patterns can be transmitted on the CAN bus with individual setting contents. Also, by separating the scheduling operation and the monitoring operation, messages corresponding to a plurality of transmission patterns can be transmitted without stopping the monitoring operation. Accordingly, it is possible to transmit messages corresponding to a plurality of transmission patterns without impairing real-time performance with an easy operation, and it is possible to improve debugging efficiency in system development using CAN.

Other Embodiments of the Invention
In the above example, the CAN bus communication is monitored. However, the communication is not limited to this, and communication of other communication protocols may be monitored. For example, serial communication such as LIN (Local Interconnect Network) may be used.

  FIG. 8 shows an example of a hardware configuration for realizing the communication monitor device described above. The CPU 201 and the communication adapter card 218 in FIG. 8 correspond to the CPU 101 and the CAN controller 102 in FIG. The communication monitoring apparatus 1 can use a typical computer system and includes a CPU 201 and a memory 204.

  The CPU 201 and the memory 204 are connected to a hard disk device 213 as an auxiliary storage device via a bus. Storage medium drive devices such as flexible disk device 220, hard disk devices 213 and 230, CD-ROM drives 226 and 229, and MO drive 228 are connected via various controllers such as flexible disk controller 219, IDE controller 225, and SCSI controller 227. Connected to the bus. A portable storage medium such as a flexible disk is inserted into a storage medium driving device such as the flexible disk device 220.

  The storage medium can store a computer program for giving a command to the CPU 201 and the like in cooperation with the operating system to implement the function of the communication monitor device 1. The computer program is executed by being loaded into the memory 204. The computer program can be compressed or divided into a plurality of pieces and stored in a storage medium. The hardware configuration typically comprises user interface hardware.

  Examples of user interface hardware include a pointing device (mouse 207, joystick, etc.) and keyboard 206 for inputting, a display device 211 such as a liquid crystal display for presenting visual data to the user, and a CRT display. There are 212.

  It is also possible to connect a printer via the parallel port 216. This computer system can be connected to a modem via the serial port 215, and connected to the network via the serial port 215 and the modem or token ring, communication adapter card 218, etc., and with other computer systems. We are communicating. In addition, the said structure can be abbreviate | omitted as needed.

It is a block diagram of the communication system containing the communication monitoring apparatus concerning this invention. It is a block diagram which shows the structure of the communication monitoring apparatus concerning this invention. It is an example of the data stored in the communication monitor apparatus concerning this invention. It is an example of the data stored in the communication monitor apparatus concerning this invention. It is a flowchart which shows the process of the communication monitoring apparatus concerning this invention. It is a flowchart which shows the process of the communication monitoring apparatus concerning this invention. It is a figure for demonstrating operation | movement of the communication monitoring apparatus concerning this invention. It is a hardware block diagram of the communication monitor apparatus concerning this invention. It is a format of a data frame communicated by CAN. It is a block diagram of the conventional communication monitoring apparatus.

1 Communication Monitor Device 101 CPU
102 CAN Controller 110 Information Storage Unit 111 Transmission Message Information 112 Transmission Condition List Information 113 Transmission Waiting Pattern Information 114 Transmission Waiting Message Information 120 Communication Monitor Control Unit 121 Transmission Status Monitoring Unit 122 Transmission Condition Determination Unit 123 Transmission Pattern Selection Unit 124 Transmission Data / Scheduling unit 125 Monitor unit 126 Information editing unit 126
130 Message Transmitter 140 Message Receiver 150 Display Unit 160 Input Unit

Claims (10)

A program for causing a computer to execute a process of transmitting a plurality of transmission messages to a serial communication network according to a transmission pattern , wherein the process includes:
A first process of acquiring a transmission start condition included in each of the plurality of transmission patterns;
A second process for determining at least one first transmission pattern for starting transmission from the plurality of transmission patterns based on the plurality of transmission start conditions ;
A third process for determining the transmission message to be transmitted from the plurality of transmission messages associated with the first transmission pattern ;
A fourth process for transmitting the transmission message determined by said third process to said serial communication network,
A fifth process that repeats the third process while transmission according to the first transmission pattern is performed;
A program comprising A sixth process of acquiring a transmission stop condition included in each of the plurality of transmission patterns;
A seventh process of determining a second transmission pattern for stopping transmission from the plurality of first transmission patterns based on the plurality of transmission stop conditions;
An eighth process of canceling the fifth process for the second transmission pattern ;
The program according to claim 1, further comprising: The transmission pattern includes data representing a cycle of repeating the transmission pattern,
The fifth process repeats the third process at a transmission timing determined by data representing the cycle.
The program according to claim 1 or 2 . The transmission pattern includes, for each of a plurality of messages included in the transmission pattern, data representing a transmission interval until the next message after message transmission is transmitted,
The fifth process repeats the third process at a transmission timing determined by data representing the transmission interval.
The program according to any one of claims 1 to 3 . The third process includes
When the transmission timing overlaps for a plurality of messages, the message to be transmitted is determined based on data included in the plurality of messages.
The program according to claim 3 or 4 . A ninth process for receiving a message from the serial communication network;
A tenth process for displaying the received message;
The program according to any one of claims 1 to 5 , further comprising: The serial communication network is a CAN communication network.
The program according to any one of claims 1 to 6 . The third process includes
When the transmission timing overlaps for a plurality of messages, the message to be transmitted is determined based on the CANID included in the plurality of messages.
The program according to claim 3 . A communication monitoring method for transmitting a plurality of transmission messages to a serial communication network according to a transmission pattern ,
A first step of receiving a message from a serial communication network;
A second step of displaying the received message;
A third step of acquiring the plurality of transmission patterns and acquiring a transmission start condition included in each of the plurality of transmission patterns;
A fourth step of determining at least one first transmission pattern for starting transmission from the plurality of transmission patterns based on the plurality of transmission start conditions;
A fifth step of determining the transmission message to be transmitted from a plurality of transmission messages associated with the first transmission pattern;
A sixth step of transmitting the transmission message which is determined by the fifth step to the serial communication network,
A seventh step of repeating the fifth step while transmission according to the first transmission pattern is performed ;
A communication monitoring method comprising: A communication monitoring device that transmits a plurality of transmission messages to a serial communication network according to a transmission pattern ,
A first means for receiving a message from a serial communication network;
A second means for displaying the received message;
A third means for obtaining a plurality of transmission patterns, and acquires the transmission start condition included in each of the plurality of transmission patterns,
A fourth means for determining at least one first transmission pattern for starting transmission from the plurality of transmission patterns based on the plurality of transmission start conditions;
A fifth means for determining the transmission message to be transmitted from a plurality of transmission messages associated with the first transmission pattern;
A sixth means for transmitting the transmission message which is determined by the fifth means to said serial communication network,
A seventh means for repeating the process by the fifth means while transmission by the first transmission pattern is being performed ;
A communication monitoring device comprising:

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