JPH0218745B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an information processing system in which a module that has obtained the right to use a common bus transfers data to other modules using the common bus. The present invention relates to an information processing system that has a function of inspecting the mounting state.

(Prior Art) In an information processing system in which a module that has obtained the right to use a common bus uses the common bus to transfer data with other modules, conventionally, the implementation state of the modules that make up the system has not been checked by humans. Based on this information, information regarding the implementation status is inputted from the outside as system configuration information.

(Problem to be solved by the invention) However, in the above method, when adding a new module or temporarily removing a certain module from the system, the information on these constituent modules must be changed each time. need to,
This is troublesome, and if an operator or the like accidentally inputs data that is different from the actual mounting state of the module, a system error may occur.

The present invention has been made in view of the above points, and an object thereof is to automatically create mounting state information of modules that constitute a system.

(Means for solving the problems) The present invention provides the following means to solve the above problems.

First, a bus use request signal line and a bus use permission signal line for controlling the right to use the common bus were provided for each module, and these signal lines were connected to a control section that controlled the right to use the common bus.

Second, a mode signal line was provided commonly to all modules, and this signal line was connected to the control section.

Third, the control section is provided with means for sending a test mode signal to the mode signal line, and means for sending a bus permission signal to the bus permission signal line after sending the test mode signal.

Fourth, after a test mode signal is sent to each module's mode signal line, a bus use permission signal is sent to its own module's bus use permission signal line, and the number of its own module is sent to the above using the common bus. A means for sending the information to the control unit is provided.

(Function) According to the information processing system of the present invention, when inspecting the mounting state of the module, the control section sends out a test signal. As a result, each module monitors the bus use permission signal addressed to itself. On the other hand, after transmitting the test signal, the control section transmits a bus use permission signal to a specific module. This bus use permission signal is recognized by the corresponding module, and that module sends its own module number to the control section using the common bus. On the other hand, after transmitting the bus use permission signal, the control section sequentially sends the bus use permission signal to other modules.

(Embodiment) FIG. 1 is a schematic configuration diagram of an information processing system to which the present invention is applied, in which 1 is a system control module as a control unit that controls the right to use a common bus;
-1, 2-2, 2-n are module #1,
#2, #n, 3 are mode signal lines, 4 is a source module address signal line, 5 is a receiving module address signal, and 6 is a data bus. Collectively called the common bus. 7-1, 7-2, 7-n are bus use request signal lines for modules #1, #2, #n, respectively, and 8-1, 8-2, 8-n are bus use request signal lines 7-n, respectively. This is a bus use permission signal line for 1, 7-2, and 7-n. In such a configuration, this information processing system has the following two types of operation modes.

(1) Normal data transfer mode (2) Test mode The above operation modes are transmitted from the system control module 1 to all modules in the information processing system via the mode signal line. Hereinafter, how this information processing system operates in the modes (1) and (2) above will be explained. First, (1) In the case of normal data transfer mode, the system control module 1 monitors the bus use request signal lines 7-1, 7-2, and 7-n, and if any of these signal lines becomes significant, the priority is A determination is made to determine that only one bus use permission signal line is significant, and only one module is given the right to use the data bus 6. The module that has been given the right to use the bus sends the source module number (own module number) and destination module number (other module number) onto the source module address signal line 4 and the destination module address signal line 5, respectively. and transfer the data to data bus 6
data transfer. Next (2) In the case of test mode, system control module 1 connects mode signal line 3
sends a signal indicating that it is in test mode.
Further, the system control module 1 sequentially sends significant signals (for example, logic "1") onto the bus use permission signal lines 8-1, 8-2, and 8-n. When each module 2-1, 2-2, 2-n learns from the mode signal line 3 that the information processing system is in test mode, it does not transfer data between modules and uses the bus assigned to its own module. The permission signal line is monitored. Then, the module whose assigned bus permission signal line becomes significant sends its own module number onto the source module address signal line 4.
In response, the system control module 1 receives a sample of the module number on the source module address signal line 4 and checks whether the module is correctly mounted. For example, (a) the module number and the number of the bus permission signal line assigned to that module are the same number, and the number of the bus permission signal line that has been determined to be significant is compared with the module number that received the sample. do.

(b) The correspondence between the module number and the number of the bus permission signal line assigned to that module is held in the system control module 1, and the above comparison is performed based on this held data.

There are several methods, but which method you choose is up to you.
The module mounting status information confirmed in this inspection is held in the system control module 1 and used as system management information.

Figure 2 shows a time chart in test mode. In this time chart, a indicates a synchronization clock signal (not shown in FIG. 1), b indicates one of the bus permission signal lines (BGNT _n ), and c indicates the other one (BGNT _n+1 ) is shown. d indicates a signal on the source module address 4, and e indicates sample data of the system control module 1. As can be seen from this figure, system control module 1 is at time A.
Then, the bus use permission signal line (BGNT _n ) for module m is made significant as shown in FIG. 2b. As a result, module m sends its own module number at the time assigned to the source module address 4 (FIG. 2d). At this time, the other party is the system control module 1. System control module 1 samples the module number on the source module address, and then, when ready, sends the bus permission signal line (BGNT _{n+1) to other module m+1} as shown in Figure 2c. It is assumed to be significant at time B. The same applies below.

In the above explanation, in addition to the mode instruction function described above, the system control module 1 has functions such as controlling bus usage rights, initializing the system, and monitoring system failures.The method for instructing the test mode is as follows. There is a method.

(a) Automatically enters test mode when the system starts up.

(b) The operator instructs the test mode from the operation panel as necessary.

(Effects of the Invention) As described in detail above, according to the present invention, since the system control module automatically creates the mounting state information of the modules that constitute the system,
When adding a module to or deleting a module from the system, there is no need for an operator to change the system configuration module information, and it also has the advantage of preventing system errors due to input of incorrect information that differs from the actual implementation status. .

Furthermore, since no bus use request signal is issued during the test mode, there is an advantage that module mounting status information can be created at high speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an information processing system to which the present invention is applied, and FIG. 2 is a time chart. 1: System control module, 2-1, 2-
2, 2-n: module, 3: mode signal line,
4: Source module address signal line, 5: Receiving destination module address signal line, 6: Data bus,
7-1, 7-2, 7-n: bus use request signal line,
8-1, 8-2, 8-n: Bus use permission signal lines.

Claims (1)

[Scope of Claims] 1. An information processing system in which a module that has obtained the right to use a common bus uses the common bus to transfer data with other modules, comprising: a control unit that controls the right to use the common bus; In between, a bus use request signal line and a bus use permission signal line are provided for each module, and a mode signal line is provided common to all modules, and further, a test mode signal is sent to the mode signal line in the control section. and means for sending a bus use permission signal to the bus permission signal line after sending the test mode signal; An information processing system comprising means for transmitting the number of the own module to the control unit using a common bus when a bus use permission signal is sent to the bus use permission signal line of the own module.