JP3347420B2 - Data processing apparatus and method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing apparatus and method for performing data processing based on a program on a memory card.

[0002]

2. Description of the Related Art Conventionally, there has been known a data processing device in which a memory card is removably mounted on an apparatus main body and performs data processing based on an application program on the mounted memory card. The main body of the apparatus is provided with a slot for mounting a memory card.

In this type of data processing apparatus, it is necessary to prevent malfunction due to sudden removal of the memory card. In particular, if the memory card is pulled out in a state where the control address (program counter) indicates the address on the memory card, that is, in a state where the application program on the memory card is being executed, the object code is instantaneously garbled, The value is undefined, the program runs away, and the data in the memory or the memory card in the main body of the apparatus may be adversely affected to cause an irreparable malfunction.

In order to avoid such a malfunction, conventionally,
A cover is provided in the slot, and when this cover is opened, this is detected and notified to the software inside the main unit by means such as hardware interrupt, and access to the memory card is prohibited and control is performed. The data was immediately transferred to the memory of the main unit.

When such access prohibition is performed, it is necessary to interrupt and perform a maintenance process such as displaying a message for a warning or an operation instruction or closing an open file. Conventionally, an interrupt maintenance routine for performing an interrupt maintenance process has been registered in the following manner.

That is, (1) an interrupt maintenance routine is provided in the basic software (operating system), and (2) an application program executed in the apparatus main body before control is transferred to an application program on a memory card. (3) The application program on the memory card has an interrupt maintenance routine. When the application program on the memory card is executed, the entire application program is transferred to the main unit of the apparatus. Control is passed to the copied application program after being copied to the internal memory.

[0007]

However, as described in the above (1), in the system in which the operating system has the interrupt maintenance routine, the display form of a message for a warning or an operation instruction becomes uniform. There is a problem that the designer of the application program cannot freely set the display format of the message, and the process flow is not flexible, such as turning off the power for safety after displaying the message or closing the file. Was.

In the method in which the application program executed in the apparatus main body has an interrupt processing routine as described in (2) above, the application program is arranged on a memory card and arranged in a memory in the apparatus main body. Because it is functionally distinguished from the program,
There is a problem that it becomes a burden in designing an application program.

Further, in the method of copying the entire application program on the memory card to the memory in the apparatus main body as in the above (3), the start of application program execution is delayed by the time for performing the copy processing, and the apparatus main body is The internal memory requires a large copy data storage area, and there is a problem in that the memory use efficiency is reduced.

[0010] The present invention has been made under such circumstances, and an object of the present invention is to provide a maintenance processing program to be executed when a memory card is pulled out with a high degree of freedom in design and a light design load, and to reduce the load on the device. It is an object of the present invention to provide a data processing apparatus and a data processing method which can be designed and installed in such a manner that the use efficiency of the memory in the main body is not reduced.

[0011]

According to the present invention, there is provided a data processing apparatus for performing data processing in accordance with an application program stored in a removable memory card. A card mounting portion, and a memory card stored in the memory card.
Maintenance process in the application program
Reading means for reading the application program during execution of the application program, storage means for storing the security processing routine read by the reading means, and the memory card.
Whether the memory card has been pulled out of the mounting portion,
Application programs stored in the memory card
A determination unit that determines during execution of the program, and when the determination unit determines that the memory card has been removed, executes the maintenance processing routine stored in the storage unit and determines that the memory card has been removed. Sana
The application stored in the memory card,
Execution means for continuing execution of the application program .

The present invention also relates to a data processing method for performing data processing according to an application program stored in a removable memory card, wherein the data processing method includes the steps of:
The maintenance routine of the application program
The memory card is read out during execution of the memory card and stored in the storage means, and whether or not the memory card is removed from the memory card mounting portion
The application stored in the memory card.
The determination is made during execution of the memory program, and when it is determined that the memory card has been removed, the maintenance processing routine stored in the storage means is executed and the memory card is removed.
If it is not determined that the memory card has been
Of the application program stored in the
Execution is continuing .

[0013]

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First and second embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 is a block diagram showing a schematic configuration of a data processing apparatus according to first and second embodiments of the present invention. This data processing device performs various data processing with the CPU 1 as a core.
A power supply system 11 including a RAM 2, a ROM 3, an input device 6 such as a keyboard, a display device 7 such as a liquid crystal touch panel, a printing device 8 such as an inkjet printer, a communication port 9, a power supply circuit 11 a, and a battery pack 11 b via a bus B.
Is connected. Further, the data processing apparatus can use a memory card 4, and a memory card reader / writer 10 is connected to the CPU 1 via a bus B.

Although not shown, a slot is formed in the housing of the data processing apparatus so that the memory card 4 can be attached to and detached from the apparatus main body. A cover is provided to prevent deviation from the main body or accidental removal. Then, the interrupt control unit 5, which detects the opening of the cover and outputs a hardware interrupt signal to the CPU 1,
It is connected to PU1.

FIG. 2 is an explanatory diagram for explaining the contents of data stored in the memory. The interrupt control unit 5 detects the opening of the cover when the memory card 4 is attached or detached, and executes a hardware interrupt. Signal (cover open interrupt signal)
Output to U1. In the RAM 2, a registration area E for registering an interrupt maintenance processing routine 41a described later recorded on the memory card 4 is formed. The basic software (operating system) 31 is preset in the ROM 3.
The routine includes a cover open interrupt processing routine 31a and a jump destination designation routine 31b.

The basic software 3 is stored in the memory card 4.
A user program (application program) 41 described in a format that can be executed by the user 1 is stored in the user program 41. A registration request routine 41b for requesting the basic software 31 to register 41a in the registration area E of the RAM 2 is included.

Next, an interrupt maintenance processing routine 41a included in the user program 41 in the memory card 4 is stored in a RAM.
2 will be described with reference to the flowchart of FIG.

When the power of the power supply system 11 is turned on (step S1), the CPU 1 starts the basic software 31 and performs necessary self-checks and various initial settings (step S1).
2). Then, the user program 41 in the memory card 4 is executed based on the basic software 31 (step S3). Then, it is determined whether or not the currently executing user program 41 includes the registration request routine 41b (step S4).

As a result, if the registration request routine 41b is included, based on the registration request routine 41b,
An interrupt maintenance processing routine 41a included in the currently executing user program 41 is registered in the RAM 2 (step S5). In this case, the user program 41, that is, the registration request routine 41b makes a registration request by passing the address and size of the interrupt maintenance processing routine 41a to the basic software 31 as parameters. Then, the basic software 31 performs the registration processing by reading the interrupt maintenance processing routine 41a from the memory card 4 and writing it in the registration area E of the RAM 2 according to these parameters. After performing the registration process, the execution of the user program 41 in the memory card 4 is restarted (step S6). If it is determined in step S4 that the registration request routine 41b is not included, the process skips step S5 and proceeds to step S6 to restart the execution of the user program 41 in the memory card 4.

Next, the interrupt maintenance processing when the cover of the memory card 4 is opened while the user program 41 in the memory card 4 is being executed will be described with reference to the flowchart of FIG.

When the cover of the memory card 4 is opened and a hardware interrupt signal is input from the interrupt control unit 5 (step S21), the CPU 1 executes a cover open interrupt processing routine in the basic software 31. 31a
Is started (step S22). In the cover open interrupt processing routine 31a, first, the basic software 3
The default process on the first side is performed (step S23). As the default process, for example, a process of closing the file in use so as to normally save the file or turning off the power supply to the memory card 4 is performed.

Next, it is determined whether or not the interrupt maintenance processing routine 41a in the memory card 4 is registered in the RAM 2 (step S24). As a result, if the interrupt maintenance processing routine 41a is registered in the RAM 2,
The access to the memory card 4 is prohibited by executing the interrupt maintenance processing routine 41a in Step 2 (Step S25). This access prohibition is such that if access to the memory card 4 is continued after the cover is opened, the object code becomes undefined and the program runs away when the memory card 4 is removed following the cover open. Because it can cause harm,
This is performed in order to prevent this adverse effect.

In the interrupt maintenance processing routine 41a, the default processing performed by the basic software 31 in step S23 performs insufficient maintenance processing. As a method of this processing, for example, as shown in FIG. 5, a display message 71 and an input key 7 are displayed on a touch panel screen 70 of the display device 7.
2 (menu key 72a and end key 72b in the figure) are displayed, and the guidance 7 of the function of each input key 72 is displayed.
3 is displayed.

Next, it is determined whether or not a jump destination has been designated, that is, in the example of FIG. 5, whether or not the menu key 72a has been touched (step S26). As a result, when the menu key 72a is touched and the jump destination is designated, the touched menu key 72 is determined based on the jump destination designation routine 31b in the basic software 31.
shampoo to the program corresponding to a (step S2
7).

As the jump destination program, for example, a program for displaying a processing menu is suitable. The method of specifying a jump destination in the user interrupt processing routine 41a can be specified by specifying a path such as a program name of a jump destination program. When information is to be passed to the jump destination, data or a file format is stored in the RAM 2. Should be memorized. However, since the default processing is performed by the basic software 31 in step S23, it is necessary to consider this in the interrupt maintenance processing routine 41a.

On the other hand, when the end key 72b is touched instead of the menu key 72a, the power is turned off (step S29) and the process ends. If it is determined in step S24 that the interrupt maintenance processing routine 41a has not been registered in the RAM 2, a default message is displayed and a key input is waited (step S28). Then, the power is turned off (step S29), and the process ends.

As described above, by registering the interrupt maintenance processing routine 41a in the memory card 4 in the RAM 2 by the basic software 31, the necessary processing when the card access is prohibited can be freely designed and stored in the memory card 4. Can be prepared in the interrupt maintenance processing routine 41a, so that the processing required when card access is prohibited can be made flexible. In addition, by providing the jump destination designation routine 31b in the basic software 31,
Jump destination control when card access is prohibited can be performed by the interrupt maintenance processing routine 41a in the memory card 4.

[Second Embodiment] Next, a second embodiment will be described. In the second embodiment, the maintenance processing required when the card access is prohibited is not partially borne by the basic software 31, but is entirely borne by the interrupt maintenance processing routine 41a recorded on the memory card 4. Also, the first
In the embodiment, the interrupt maintenance processing routine 41a is only registered in the RAM 2, but in the second embodiment, in addition to this, the vector which is the jump destination pointer at the time of interruption is rewritten. This vector rewriting function is provided in the basic software 31 and is performed by a user program in the memory card 4 requesting the basic software 31. At this time, the pointer written in the vector becomes the start address of the copied interrupt maintenance processing routine 41a, that is, the start address of the registration area E.

Next, an interrupt maintenance process when a card access is prohibited in the second embodiment will be described with reference to a flowchart of FIG.

When the cover of the memory card 4 is opened and a hardware interrupt signal is input from the interrupt control section 5 (step S31), the CPU 1 issues a user instruction for the user interrupt processing. Starts the interrupt maintenance processing routine 41a registered in the registration area E of the RAM 2 (step S32), and executes the interrupt maintenance processing according to the interrupt maintenance processing routine 41a (step S33).

In this case, in the present embodiment, since the basic software 31 does not perform any processing required when the card access is prohibited, the processing to be performed in the interrupt maintenance processing in step S33 is entirely performed by the user in the memory card 4. It is left to the design of the program (interrupt maintenance processing routine 41a). Therefore, the process of closing only the data created or updated during the execution of the user program up to that time and the necessary files is performed by the interrupt maintenance processing routine 41.
It can also be included in a. When jumping to another program and transferring control to the jump destination program, it is possible to leave necessary information on the jump destination program in the RAM 2 in the form of data or a file.

Next, for example, in response to the guidance display or the like shown in FIG. 5, it is determined whether a jump destination has been designated (step S34). As a result, when the jump destination is designated, the program is shampooed to the designated jump destination program based on the jump destination designation routine 31b in the basic software 31 (step S35). on the other hand,
If no jump destination is specified, the power is turned off (step S36), and the process ends.

As described above, the basic software 31 registers the interrupt maintenance processing routine 41a in the memory card 4 in the RAM 2 and rewrites the interrupt vector when the card access is prohibited, so that the processing required when the card access is prohibited is performed. It can be freely designed and prepared for the interrupt maintenance processing routine 41a in the memory card 4, and it is possible to provide flexibility in the maintenance processing required when card access is prohibited. In addition, since the basic software 31 does not perform any default processing, the time required for the default processing can be reduced. For example, since there are many open files, it takes time to close the file in the default process, and the user program (interrupt processing) to avoid a situation in which the execution of the guidance display in the user interrupt processing routine 41a is delayed. It can be prepared on the maintenance processing routine 41a) side.

By providing the jump destination designation routine 31b in the basic software 31, the jump destination control when the card access is prohibited can be performed by the interrupt maintenance processing routine 41a in the memory card 4.
At this time, since the default processing is not performed on the basic software 31 side, the way of passing information to the jump destination can be freely designed on the user program side. Further, only the interrupt maintenance processing routine 41a is registered without registering the entire user program in the RAM2.
There is no decrease in the use efficiency of M2.

[0037]

As described above, according to the present invention ,
High degree of freedom in the design of conservation program, lighter burden of design, and it is possible to design and equipped in such a way does not cause a reduction in the use efficiency of the memory in the apparatus main body.

More specifically, for example, the display of a message such as a warning to the operator and an explanation of the operation at the time of card removal can be freely designed on the user program side. Not only system shutdown by turning off, but also flexibility, such as jumping to other programs, and saving files and data only when necessary, and system defaults It is possible to obtain effects such as saving unnecessary wasteful processing.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a data processing device according to first and second embodiments of the present invention.

FIG. 2 is an explanatory diagram for describing data contents stored in a memory.

FIG. 3 is a flowchart showing a registration process of an interrupt maintenance process routine.

FIG. 4 is a flowchart illustrating an interrupt maintenance process according to the first embodiment.

FIG. 5 is a diagram showing a display example of a message such as a warning and an explanation of an operation as an example of an interrupt maintenance process.

FIG. 6 is a flowchart illustrating an interrupt maintenance process according to the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... CPU 2 ... RAM 3 ... ROM 4 ... Memory card 5 ... Interrupt control unit 7 ... Display device 10 ... Memory card reader / writer 31 ... Basic software 31a ... Cover open interrupt processing routine 31b ... Jump destination designation routine 41 ... User program 41a: Interruption maintenance processing routine 41b: Registration request routine

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-303692 (JP, A) JP-A-3-51921 (JP, A) JP-A-4-1722582 (JP, A) 82297 (JP, A) JP-A-2-309437 (JP, A) JP-A-63-180187 (JP, A) JP-A-60-229169 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G06F 11/00, 3/08

Claims (4)

(57) [Claims] 1. A stored in the removable memory card Tei
A data processing device for performing data processing in accordance with an application program, wherein a memory card mounting unit in which the memory card is mounted; and an application program stored in the memory card .
The maintenance routine in the program
Reading means for reading during execution of the security program, storage means for storing the security processing routine read by the reading means, and pulling out the memory card from the memory card mounting portion.
Whether the memory card has been deleted or not.
A determination unit that determines during execution of the application program; and if the determination unit determines that the memory card has been removed, executes the security processing routine stored in the storage unit and removes the memory card. Was
If not, it is stored in the memory card
Execution means for continuing the execution of the application program . 2. The method according to claim 2, wherein the memory card mounting unit has a cover, and the determining unit detects that the memory card has been pulled out from the memory card mounting unit when detecting that the cover is opened. The data processing device according to claim 1, wherein the determination is performed. 3. A stored in the removable memory card Tei
A data processing method for performing data processing in accordance with an application program that the storage of the memory card
Maintenance process in the application program
Read out the memory card during execution of the application program and store it in the storage means, and pull out the memory card from the memory card mounting portion.
Whether the memory card has been deleted or not.
When the application program is determined to be executed, and when it is determined that the memory card is removed, the security processing routine stored in the storage unit is executed.
If it is not determined that the memory card has been
The application stored in the memory card.
A data processing method characterized by continuing execution of an application program . 4. The memory card mounting portion has a cover, and the determination as to whether the memory card is pulled out from the memory card mounting portion is made based on whether the cover is opened. 4. The data processing method according to claim 3, wherein: