JP2005202796A - Bus monitor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bus monitor device capable of accurately determining a monitored unanalyzable command and quickly analyzing the monitoring results. <P>SOLUTION: The bus monitor device for monitoring and analyzing a signal transmitted on an interface connecting a plurality of equipment and modules is provided with a control means (control part 14) for retrieving a similar command among standard commands registered based on a database connected via a network and for controlling comparison of differences with the monitored unanalyzable command when the unanalyzable code is designated among the monitoring results. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bus monitor device for monitoring and analyzing signals transmitted on an interface connecting a plurality of devices / modules.

In a bus monitor device for monitoring and analyzing signals transmitted on an interface connecting multiple devices / modules, various types of information can be displayed as well as command analysis at a higher protocol level as well as displaying transmitted information as it is. There are protocol analyzers and bus monitor devices that separate and monitor image data and command data from the transmitted signal, but the types of images and commands that flow on the interface targeted by the bus monitor have increased, The format is becoming more complex.
As a conventional technique for command analysis, for example, in the bus monitor device disclosed in Patent Documents 1 and 2, a command is analyzed by searching a definition file prepared in advance, and a monitor result is displayed.
JP 2002-281111 A JP 2003-216512 A

However, if a code that cannot be analyzed is monitored, it is registered in order to determine whether it is a fault to be monitored, a command entry in the definition file missing, or a command parameter update missing. It was necessary to confirm the difference with many commands, and the work efficiency of command analysis was extremely bad.
It is an object of the present invention to provide a bus monitor device that can accurately determine a monitored command that cannot be analyzed and quickly analyze a monitoring result.

In order to achieve the above object, the invention according to claim 1 is a bus monitor device for monitoring and analyzing a signal transmitted on an interface connecting a plurality of devices / modules. When specifying a code that has become possible, a control means that performs a control to search for a similar command from standard commands registered based on a network-connected database and compare the difference with the monitored command that cannot be analyzed The main feature is the equipped bus monitor.
The invention according to claim 2 is characterized in that, in the bus monitor device according to claim 1, the bus monitor device which can directly set the information for searching the standard command on the database.
The invention according to claim 3 is characterized in that, in the bus monitor device according to claim 2, the main feature of the bus monitor device is to check compatibility with the old command when updating the parameters of the standard command registered in the database. To do.
The invention according to claim 4 is the bus monitor device according to claim 3, wherein the bus monitor device which searches for and downloads the command protocol of the specified condition from the database and notifies the difference from the monitored command protocol result is mainly used. Features.
The invention according to claim 5 is characterized in that, in the bus monitor device according to claim 4, the bus monitor device which can designate the standard command protocol and command list protocol comparison start and end positions.
The invention according to claim 6 is characterized in that, in the bus monitor device according to claim 5, the bus monitor device which can arbitrarily set a command type which is not subject to protocol comparison from the monitored command list.
According to a seventh aspect of the present invention, the bus monitor apparatus according to the sixth aspect is characterized in that a bus monitor apparatus that sets / cancels a command type that is not subject to comparison in a comparison result list.
The invention according to claim 8 is the bus monitor device according to claim 7, wherein the bus monitor device accepts the reversal of the transmission order in the time series with respect to a specific command with respect to the registered command protocol. And

  According to the present invention, it is possible to easily determine whether a monitored command that cannot be analyzed is a malfunction to be monitored, a command description missing from the definition file, or a command parameter update missing, Analysis can be performed quickly.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a connection diagram of a device and a bus monitor device. Device 1 and device 2 are connected by an interface 3. The devices 1 and 2 include functional modules 1-A and 1-B and functional modules 2-A and 2-B, respectively, which are also connected by a common interface 3.
The bus monitor device 4 of the present invention monitors data transfer between functional modules connected by this interface 3. The data transfer to be monitored is data transfer between devices such as device 1 and device 2, or data transfer between function modules in the same device such as function modules 1-A and 1-B. It doesn't matter.
FIG. 2 is a network configuration diagram of the bus monitor device. The bus monitor device 4 connected via a network such as a LAN shares a definition file registered in each model database (DB) 6 within the server 5 also connected via a network such as a LAN. The printer 7 and the copier 8 correspond to the devices 1 and 2 in FIG.
FIG. 3 is a functional block diagram of the bus monitor device according to the embodiment of the present invention. The bus monitor device includes an input unit 11, a reception unit 12, a definition file storage unit 13, a control unit 14, a filter 15, a command cutout unit 16, a command data buffer 17, an image data buffer 18, an image display unit 19, and a display unit 20. A command / protocol analysis unit 21, an image information table 22, a definition file editing unit 23, and a communication control unit 24.
The user inputs command cut-out conditions and information for specifying a definition file to be referenced from the input unit 11 to the control unit 14 before performing the monitoring operation. The definition file may be specified by the communication control unit 24 to read a new definition file from the server 5 connected to the network, or a default definition file may be prepared in advance.

The receiving unit 12 extracts an address value, a data value, and the like from the data transmitted on the interface 3 and passes them to the filter 15. Data is classified into command data and image data by the filter 15 and stored in the command data buffer 17 and the image data buffer 18.
The data in the command data buffer 17 is sequentially input to the command cutout unit 16. The command cutout unit 16 passes the command cutout conditions set by the user through the input unit 11 from the control unit 14, cuts out the data input from the data buffer 17 according to the command and passes it to the command / protocol analysis unit 21. .
The command / protocol analysis unit 21 reads the contents of the specified definition file from the definition file storage unit 23, analyzes the received command data, adds data such as a command name, and passes the data to the display unit 20. For codes that could not be analyzed, information that could be analyzed was added to the display unit 20 and displayed on the display unit 20 as an analysis impossible command.
Then, the image display unit 19 refers to the image information table 22, cuts out image data from the image data buffer 18 in units of one image unit, etc., and passes them to the display unit 20.
The user instructs from the input unit 11 to search for and call a standard command from an undefined command specification and a database connected to the network, compare the differences with the command / protocol analysis unit 21, and display the result on the display unit. 20 is displayed.
Similarly, the standard command protocol is retrieved and called from the database connected to the network, the difference is compared by the command / protocol analysis unit 21, and the result is displayed on the display unit 20.
In the bus monitor device 4 configured as described above, the command / protocol analysis unit 21 compares the definition file on the server 5 with the following operation for each embodiment.

In the bus monitor device 4, when the user designates an undefined command from the input unit 11 and gives an instruction for comparison with a standard command, the command / protocol analysis unit 21 provides information (command group number, etc.) that can be analyzed. The search information is passed to the control unit 14. Based on this information, the control unit 14 causes the communication control unit 24 to search for a corresponding standard command candidate from the network-connected database 6.
When the user selects a standard command to be compared, the corresponding standard command data is downloaded, the command / protocol analysis unit 21 performs comparison, and the result can be displayed on the display unit 20. FIG. 4 shows an example of the command comparison result screen.

  In the bus monitor device 4, when the analyzed information (command group No., etc.) is passed to the control unit 14 as search information, if the analysis sufficient for the search is not performed or the search condition is specified in advance The user can set the search information directly from the input unit 11 (pass it to the control unit 14).

  In the bus monitor device 4, when a change such as parameter addition is made to the standard command, the standard command that is the basis of the command newly edited by the definition file editing unit 23 is searched and downloaded from the database 6 connected to the network. Can be compared and displayed, and the additional position of the additional parameter can be verified.

  In the bus monitor device 4, the standard command protocol on the database 6 designated by the user from the input unit 11 is downloaded to the command / protocol analysis unit 21 via the communication control unit 24. The command / protocol analysis unit 21 compares the downloaded standard command protocol with the command monitor result (command list), and displays the comparison result on the display unit 20. FIG. 5 is a diagram showing an example of a command protocol comparison result screen.

  In the bus monitor device 4, the user can arbitrarily set the comparison area from the input unit 11 for the downloaded standard command protocol and command monitor result described in the fourth embodiment. The command / protocol analysis unit 21 compares the set comparison area and displays the comparison result on the display unit 20.

  In the bus monitor device 4, the command type specified by the user from the input unit 11 is marked as a non-comparison command for the command monitor result (command list) to be compared with the standard command protocol, and compared with the standard command protocol. Can be removed from the control. In FIG. 5, the command “No Check” indicates a non-comparison command.

  In the bus monitor device 4, when the user sets the [Status] field on the command protocol comparison result screen shown in FIG. 5 to [No Check] from the input unit 11, the command / protocol analysis unit 21 executes the comparison again. , The comparison result can be displayed by removing all the same commands from the comparison with the standard command protocol.

In the bus monitor device 4, a plurality of commands designated by the user from the input unit 11 are registered in the command / protocol analysis unit 21 as time series allowable commands, and if the time series is reversed in comparison with the standard command protocol, comparison is performed. On the result screen, a display indicating time series inversion is performed. In FIG. 5, the non-comparison command is indicated by the display of [order (vertical direction symbol)].
In the present invention, it is possible to easily determine whether the monitored unanalyzed command is a failure to be monitored, a command description missing in the definition file, or a command parameter update omission. Can be done quickly.
In addition, the number of search results for standard commands that are comparison candidates can be reduced, and the analysis of the monitor results can be performed quickly.
Also, by checking compatibility with old commands when updating parameters, it is possible that the command that cannot be analyzed is monitored because of a failure to be monitored, missing commands in the definition file, or missing command parameters. Can be analyzed efficiently.
Further, it is possible to easily confirm how the monitored command protocol is different from the standard command protocol, and it is possible to quickly analyze the monitoring result.
In addition, since the user can arbitrarily specify the range of command protocols to be compared, there is no need to confirm a huge comparison result, and the analysis of the monitor result can be performed efficiently.
Further, in the comparison between the monitored command list and the registered command protocol, an increase in protocol difference can be avoided, and the analysis of the monitoring result can be performed efficiently.
In addition, it is possible to specify the setting / cancellation of the command type on the comparison result list, thereby improving work efficiency.
Also, by excluding non-standard protocols that have no functional problems from the object of difference detection, it is possible to efficiently analyze the monitor results.

Connection diagram of equipment and bus monitor device. The network block diagram of a bus monitor apparatus. The functional block diagram of the bus monitor apparatus which concerns on embodiment of this invention. The figure which shows an example of a command comparison result screen. The figure which shows an example of a command protocol comparison result screen.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Input part, 12 Receiving part, 13 Definition file memory | storage part, 14 Control part, 15 Filter, 16 Command extraction part, 17 Command data buffer, 18 Image data buffer, 19 Image display part, 20 Display part, 21 Command / protocol analysis Section, 22 image information table, 23 definition file editing section, 24 communication control section

Claims (8)

  In a bus monitoring device for monitoring and analyzing signals transmitted on an interface connecting multiple devices / modules, a database connected via a network is used to specify codes that cannot be analyzed from the monitoring results. A bus monitoring device comprising a control means for performing a control for searching for a similar command from standard commands registered based on the command and comparing the difference with a monitored non-analyzable command.   2. The bus monitor device according to claim 1, wherein information for searching for a standard command on a database can be directly set.   3. The bus monitor device according to claim 2, wherein when the parameter of the standard command registered in the database is updated, compatibility with the old command is confirmed.   4. The bus monitor device according to claim 3, wherein a command protocol of a specified condition is searched from a database and downloaded, and a difference from the monitored command protocol result is notified.   5. The bus monitor device according to claim 4, wherein the standard command protocol and command list protocol comparison start and end positions can be designated.   6. The bus monitor device according to claim 5, wherein a command type that is not subject to protocol comparison can be arbitrarily set from the monitored command list.   7. The bus monitor device according to claim 6, wherein setting / cancellation of a command type that is not subject to comparison is performed in a comparison result list.   8. The bus monitor device according to claim 7, wherein a reversal of a transmission order in a time series is allowed for a specific command with respect to a registered command protocol.

Images