JPH09134296A - Process tracer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accumulate control information and the history of program execution in a state where a loaded unit is in a sealed state. SOLUTION: The program execution part 11a of MPU 11 analyzes the instruction of ROM 14 into which an application program where a process tracing function is incorporated is written, and executes a processing in accordance with the instruction. The tracing management part 11b of MPU 1 accumulates ID given in the respective processing units of the application program and the state of a register and the like in MPU 11 as tracing information in RAM 15 when the application program in the program execution part 11a is executed. When the tracing management part 11b receives a tracing information request command from an external unit via a serial input/output terminal 13 and UART 12, it outputs tracing information accumulated in RAM 15 to the external unit via UART 12 and the serial input/output terminal 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process tracer, and more particularly, to a program validity evaluation and a failure analysis after product release in the program development of an on-board device incorporating a microcomputer device.

[0002]

2. Description of the Related Art Conventionally, in some spaceborne aircraft, aircraft, or on-board equipment to be mounted on a ship, the housing itself is hermetically sealed after the microcomputer device is incorporated.

In this on-board equipment, control information of the microcomputer device and the execution state of the program are output in order to evaluate the adequacy of the program in the program development of the microcomputer device or to analyze the failure after product release. Parallel output circuit and LED (Light Emitting Di
ode: light emitting diode) is provided, and a monitor display is performed using an LED.

That is, as shown in FIG. 3, an MPU (Micro Process) is provided in the sealed on-board device 3.
ing Unit) 31 and ROM (Read Onl)
yMemory 32 and RAM (Random Ac)
cess Memory) 33 and LED 34 are incorporated.

The MPU 31 uses the ROM 32 and the RAM 33 to execute the application program, and
The control information and the execution state of the program are displayed on the LED 34 as a monitor. That is, by turning on or off the LED 34, it is displayed whether the control information is normally exchanged or the program is normally executed.

[0006]

In the conventional on-board equipment described above, evaluation of the adequacy of the program and failure analysis after product release in the program development of the microcomputer device incorporated therein are displayed on the LED monitor. It is based on the latest status.

That is, since the control information and the latest state of program execution are displayed on the LED, and the display contents are constantly updated each time the program is executed, only the control information and the temporary state of program execution are displayed. It is not possible to analyze its history.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a process tracer capable of accumulating control information and program execution history even when mounted equipment is hermetically sealed.

Another object of the present invention is to provide a process tracer capable of outputting the control information and the history of program execution to the outside for analysis even when the mounted equipment is hermetically sealed.

[0010]

A process tracer according to the present invention is a process tracer for an on-board device in which an information processing device for executing a plurality of processes of an application program is incorporated and sealed, each of the plurality of processes being An accumulating unit that accumulates, as history information, the identification information previously given to each of the plurality of processes and the internal state of the information processing apparatus each time it is executed is provided.

In addition to the above configuration, another process tracer according to the present invention includes an instruction incorporated in each of the plurality of processes and outputting identification information corresponding to each of the plurality of processes when the process is executed.

In addition to the above configuration, another process tracer according to the present invention is provided with means for outputting the contents of the storage means to the outside in response to an external instruction, and the outer wall of the hermetically sealed container of the on-board equipment, and It has a serial input / output terminal used for inputting an external instruction and outputting the contents of the storage means.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the operation of the present invention will be described below.

Each time each process of the application program of the mounted device in which the microcomputer device is incorporated and sealed is executed, the identification number assigned to each process and the state of the MPU register etc. are stored in the memory.

Further, in a sealed on-board device, a serial input / output terminal is provided in the housing for outputting the trace data accumulated in the memory to the outside, and the external device is input through this serial input / output terminal. The trace data stored in the memory is output to the external device from the serial input / output terminal according to the stored data output request from the. As a result, it becomes possible for the external device to analyze the history of the program execution state of the on-board device.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention. In the figure, the mounted device 1 is an MPU.
11 and UART (Universal Asynch
Ronous Reciever Transmitt
er) 12, serial input / output terminal 13, and ROM 14
And a RAM 15 are incorporated. Here, the serial input / output terminal 13 is attached to the outer wall of the housing of the mounted device 1.

The program execution unit 11a of the MPU 11 analyzes the instruction of the ROM 14 in which the application program having the process trace function is written, and executes the processing according to the instruction.

The trace management unit 11b of the MPU 11 has an ID (identifier) assigned to each processing unit of the application program and a register (not shown) in the MPU 11 when the application program is executed by the program execution unit 11a. The states such as are accumulated in the RAM 15 as trace information.

When the trace management unit 11b receives a trace information request command from an external device (not shown) via the serial input / output terminal 13 and the UART 12, the RA
The trace information accumulated in M15 is output to an external device via the UART 12 and the serial input / output terminal 13.
The program execution unit 11a and the trace management unit 11b are realized by the program written in the ROM 14.

FIG. 2 is a conceptual diagram of an application program according to an embodiment of the present invention. 2A shows an example of the processing of the application program according to the embodiment of the present invention, and FIG. 2B shows another example of the processing of the application program according to the embodiment of the present invention.
(C) has shown the structure of RAM15 of FIG.

When the process A is executed by the program execution unit 11a of the MPU 11, the process trace function 21 incorporated in the process A is executed at the end of the process A, and "I" of the process A is executed.
"Da" is passed to the trace management unit 11b, and "IDa" is written in the RAM 15 by the trace management unit 11b [see FIGS. 2 (a) and 2 (c)].

When the process B is executed by the program execution unit 11a, the determination function 22 incorporated in the process B operates at the end of the process B to determine which path (route) of the application program is used to complete the process. To be judged.

The process trace function 23 or the branch destination process trace function 24 is executed according to the determination result of the determination function 22, and "ID b" or "I" of the process B is executed.
"Dc" is passed to the trace management unit 11b, and "ID b" or "ID c" is written on the RAM 15 by the trace management unit 11b [see FIGS. 2 (b) and 2 (c)].

In the above example, the case where the ID given to each process of the application program is written as trace information in the RAM 15 by the trace management unit 11b has been described, but the states of the registers in the MPU 11 are also described above. RA at the end of processing A and B in the same manner as
It is possible to store in M15.

As described above, in the mounted device 1 in which the MPU 11 for executing the application program including the plurality of processes is incorporated and hermetically sealed, each of the plurality of processes of the application program is executed by the MPU 11 each time the plurality of processes is executed. Pre-assigned ID and MPU11
By storing the internal state of the above as the history information in the RAM 15, it is possible to accumulate the control information and the history of program execution even when the mounted device 1 is sealed.

Also, from the external device, the serial input / output terminal 1
3 when the trace information request command is received via the UART 3 and the UART 12,
By outputting the trace information accumulated in M15 to the external device via the UART 12 and the serial input / output terminal 13, the control information and the program execution history are output to the outside for analysis even when the mounted device 1 is sealed. can do.

[0027]

As described above, according to the process tracer of the present invention, each of a plurality of processes is executed in a mounted device in which an information processing device for executing an application program including a plurality of processes is incorporated and sealed. By accumulating the identification information and the internal state of the information processing device, which have been previously given to each of the plurality of processes, in the accumulating means as the history information, the control information and the program execution history can be stored even when the mounted device is sealed. The effect is that it can be accumulated.

Further, according to another process tracer of the present invention, the contents of the accumulating means are output from the serial input / output terminals provided on the outer wall of the hermetically sealed container of the on-board equipment so that the on-board equipment can be operated. Even in the sealed state, there is an effect that control information and program execution history can be output to the outside for analysis.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

2A is a diagram showing an example of processing of an application program according to an embodiment of the present invention; FIG. 2B is a diagram showing another example of processing of an application program according to an embodiment of the present invention; ) Is a diagram showing a configuration of the RAM of FIG. 1.

FIG. 3 is a block diagram showing a configuration of a conventional example.

[Explanation of Codes] 1 On-board equipment 11 MPU 11a Program execution unit 11b Trace management unit 12 UART 13 Serial input / output terminal 14 ROM 15 RAM 21, 23, 24 Process trace function

Claims (3)

[Claims] 1. A process tracer for an on-board device, in which an information processing device for executing an application program comprising a plurality of processes is incorporated and hermetically sealed, wherein each of the plurality of processes is executed every time the plurality of processes is executed. 2. A process tracer, comprising: storage means for storing, as history information, identification information given in advance to the information processing apparatus and an internal state of the information processing apparatus. 2. The process tracer according to claim 1, further comprising an instruction that is incorporated in each of the plurality of processes and outputs corresponding identification information when the plurality of processes are executed. 3. Means for outputting the contents of the accumulating means to the outside in response to an external instruction, and used for inputting the external instruction and outputting the contents of the accumulating means provided on the outer wall of the closed container of the on-board equipment. The process tracer according to claim 1 or 2, further comprising a serial input / output terminal.