JPH08161202A - Program runaway detection method and program runaway detection device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a program runaway detection method and device capable of surely detecting a program runaway even when the original program is not restored and thereby preventing the device runaway. [Configuration] Detects that the original program is not restored due to an event at the lowest possible level, such as the power supply, and detects runaway. [Effect] It becomes possible to prevent the program runaway detection error as much as possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microcomputer program control device for home electric appliances, and more particularly to detection of runaway.

[0002]

2. Description of the Related Art With the recent development of microcomputer technology, microcomputers have been used for relatively small and inexpensive devices such as home electric appliances in order to exert their proper functions. For example, even in a simple process such as heating a food with seemingly specified electromagnetic wave intensity and time, such as a microwave oven,
A microcomputer is equipped to control the intensity of electromagnetic waves, control the rotation of the tableware, and generate a termination sound to notify the user of the fact that the specified time has been measured and passed. Program operation, for example, task switching is being performed.

By the way, as a program runaway detection method and device of this conventional microcomputer control device, there is, for example, the one disclosed in Japanese Patent Laid-Open No. 2-304635. This means that when calling another program from a running program, the calling program retains a plurality of return information such as a return address, and after the processing ends, the retained return information is compared. If there is a discrepancy, it is determined that the program is out of control.

[0004]

However, in the above-mentioned conventional technique, the comparison of the information held multiple times is performed when the processing of the called other program is completed and the return processing to the original program is performed. It Therefore, if the process of returning to the original program is not performed due to a runaway caused by a lightning strike, noise accompanying ON / OFF of a nearby large-capacity power supply, etc., runaway detection cannot be performed and is meaningless. . Moreover, especially for household appliances, it is easy to mistakenly operate the outlet such as accidentally disconnecting the outlet, or if you accidentally disconnect the outlet, you may rush to insert it immediately. The state changes, VT
In the case of R, the position of the tape may change before it reaches a steady speed. Depending on the device, a secondary error may occur, such as not necessarily an appropriate countermeasure.
Furthermore, there are mischiefs for children. For this reason, it is not uncommon for the program, and eventually the device controlled by the program, to run away with these as the direct and indirect causes.

Further, these not only directly or indirectly cause a failure of the equipment, but also cause a secondary inconvenience such as damage to a processing object of the equipment such as food in a microwave oven. Further, not only the program for home electric appliances but also the general program, it is difficult to completely prevent a program mistake.
It is also pointed out in No. 304635.

As a result, so-called garbled RAM (damage of data such as the call destination of the RAM and the register and the address of the call source) occurs, and program runaway occurs. Therefore, there is a demand for a method and apparatus that can detect runaway programs. In addition, there is also a demand for a method and a device that can appropriately cope with a program runaway in the unlikely event.

The present invention has been made for the purpose of solving the above problems.

[0008]

In order to achieve the above object, in the invention of claim 1, a plurality of tasks can be processed according to a program (accordingly), and the task is returned to the original task when the task is switched. In order to detect a program runaway by storing the information necessary for doing so and comparing the information, etc., in the program runaway detection method, switching the process from the task currently being processed (including a subroutine) to the next task A task switching request step for requesting a return task, a return information storing step for storing return information to a task before switching to a task before switching when a task being executed is switched to a different task, and the return information storing step. The return information stored in step 1 is copied and stored in the return information save section that uses an area different from the step for storing the return information. And return information saving processing step that,
A potential detection step of detecting a predetermined potential of the AC power supply,
The restoration information stored in the restoration information storing step and the restoration information stored in the restoration information saving processing step are caused by the predetermined potential detected in the potential detecting step (including the detection itself). If both information do not match as a result of the return information comparing step of comparing the return information comparing step with the return information comparing step, it is determined that a program runaway has occurred, and predetermined compensation processing such as stop of program execution against the program runaway (program runaway The program has a program runaway coping step for taking a coping measure).

According to the second aspect of the invention, a plurality of tasks can be processed according to a program, and the information necessary for returning to the original task when switching the tasks is stored and the information is used. In a program runaway detection device that detects program runaway, a task switching request unit requesting switching from the task currently being processed to the processing of the next task, and the task being processed in advance by a request from the task switching request unit. A return information storage unit that stores return information to the task before switching, for example, address information when switching to a different task such as defined,
A return information saving unit that uses a storage area different from that of the return information storing unit, a return information saving processing unit that copies the return information stored in the return information storing unit and stores it in the return information saving unit, and an alternating current A potential detection unit that detects a predetermined potential of the power supply, restoration information stored in the restoration information storage unit due to the potential detected by the potential detection unit, and restoration information stored in the restoration information saving unit. And a return information comparison unit that compares whether or not there is a match, and if there is no match as a result of the comparison of both information, it is determined that a program runaway has occurred and a predetermined compensation process for program runaway such as equipment stop It is characterized by having a program runaway coping unit that constitutes

Further, in the invention of claim 3, a constant time interval measuring step for measuring a constant time interval in place of or in combination with the potential detecting step and a return information comparing step are stored in the return information storing step. The return information comparison small step of comparing the restored return information stored in the return information saving step and the restored return information stored in the return information saving step, and in synchronization with the time interval measured in the fixed time interval measuring step (including a fixed time Delay) and the return information comparison control small step for actually performing the return information comparison small step.

Further, in the invention of claim 4, a constant time interval measuring unit for measuring a constant time interval, in place of or in combination with the potential detecting unit, and the return information comparing unit, are provided with the constant time interval. A synchronization signal receiving portion that receives a notification to that effect at regular time intervals measured by the measuring unit, return information stored in the return information storage unit due to the synchronization signal received by the synchronization signal receiving portion, and the return It is characterized in that it has a return information comparison part for extracting and comparing the return information stored in the information saving part.

Further, in the invention of claim 5, the time interval of the predetermined potential detected in the potential detecting step is divided by a special program according to a separately defined rule (each AC cycle is defined as Since it is divided in sequence for each cycle, it is also called frequency division.) A dividing step and a return information comparison control step for executing the return information comparing step in synchronization with the time interval divided in the dividing step. It is characterized by

Further, according to the invention of claim 6, the division unit divides the time interval of the predetermined potential detected by the potential detection unit according to a separately defined rule, and the time interval divided by the division unit is synchronized. And a return information comparison control unit for driving the return information comparison unit. Further, in the invention of claim 7, the comparison information determined according to each task (including the lack of the comparison information in some tasks) is stored in advance in the comparison information storage section including the ROM or the like having the program runaway resistance. In place of or in addition to the comparison information storing step, the return information storing step for storing the return information to the task before switching or the copy information thereof and the return information saving processing step, a predetermined comparison is made from the comparison information storing section. In place of or in combination with a comparison information storing step of taking out information, copying it, and storing it in a storage area for storage, and a return information comparing step of comparing the information stored in the return information storing step and the return information saving processing step. The comparison information comparison step for comparing the comparison information stored and stored in the comparison information storage step with the original information. It is characterized by and a flop.

Further, in the invention of claim 8, comparison information having program runaway resistance in which comparison information determined according to each task (including, when all tasks use the same comparison information, etc.) is stored in advance. An information storage unit, a comparison information execution storage unit that stores comparison information during program execution, and a return information storage unit and a return information save processing unit that store return information to the task before switching or copy information thereof In addition to or in addition, a predetermined comparison information is taken out from the comparison information storage unit, is copied, is stored in the comparison information executing storage unit and is stored therein, the return information storage unit and the return information saving process. The information stored in the comparison section is copied in the comparison information storage section instead of or in combination with the return information comparison section and stored in the comparison information execution storage section. It is characterized by and a comparison information comparing unit for comparing the original information comparison information.

Further, in the invention of claim 9, the program runaway coping step includes an operating state and an initial setting state of a device equipped with the return information stored in the return information storing step or a program associated therewith. Runaway to have program runaway resistance (not destroyed) because at least one side uses a different power source such as a dry battery or storage battery, or is electromagnetically sealed from the outside with a metal foil. Handling Recovery information storage Small steps and information necessary for executing the next task from the end of each task (including information for restart program itself and device protection) Prior to execution of the program, it is stored in advance in the memory unit for restart having runaway resistance (including, when the device is manufactured). After the stop of the program that has runaway based on the information stored in the memory storage small step and the runaway handling recovery information storage small step and the restart memory storage small step After the runaway that causes the next task to execute the program again It is characterized in that it has a continuous restart small step.

Further, in the invention of claim 10, the program runaway coping unit is equipped with the restoration information stored in the restoration information storage unit or a program associated therewith, and the operating state and the initial setting state are small. Also remembers one side and has program runaway resistance (not destroyed)
A runaway handling return information storage part to be stored in the runaway resistant storage part and information necessary for executing the next task from the end of the task for each task are stored in advance before the program execution, Then, the restarting memory part comprising a ROM or the like having runaway resistance, the runaway for causing the program to be executed from the next task based on the information stored in the runaway handling recovery information memory part and the restarting memory part. It is characterized by having a continuous restart part after completion.

[0017]

With the above structure, in the invention of claim 1,
A program runaway detection method capable of processing a plurality of tasks according to a program and storing information necessary for returning to the original task when switching tasks, and using the information to detect runaway of the program The following actions are performed. In the task switching request step, switching of processing from the task currently being processed to the next task is requested. In the return information storing step, when the task being executed is switched to a different task, the return information to the task before the switching is stored in the program storage unit or the like. In the potential detecting step, a predetermined potential of the AC power supply is detected. In the restoration information saving processing step, the restoration information stored in the restoration information storing step is copied and stored in the restoration information saving unit which uses an area different from that in the restoration information storing step. In the restoration information comparing step, the restoration information stored in the restoration information storing step and the restoration information stored in the restoration information saving processing step are caused by the predetermined potential detected in the potential detecting step. Compare. If it is determined in the program runaway handling step that the two pieces of information do not match as a result of the return information comparing step, it is determined that a program runaway has occurred, and a predetermined compensation process for the program runaway is performed.

According to the second aspect of the present invention, a plurality of tasks can be processed according to a program, and the information necessary for returning to the original task when switching the tasks is stored and used. In the program runaway detection device that detects a program runaway, the following actions are performed. The task switching request unit requests switching from the task currently being processed to the processing of the next task according to the program. The return information storage unit stores return information to the task before switching when the task being processed is switched to a different task in response to a request from the task switching request unit. The restoration information saving unit uses a storage area different from that of the restoration information storage unit to perform predetermined storage. The restoration information saving processing unit electromagnetically reads the restoration information stored in the restoration information storage unit, and then copies it and stores it in the restoration information saving unit. The potential detector detects a predetermined potential of the AC power supply. The restoration information comparison unit compares the restoration information stored in the restoration information storage unit with the restoration information stored in the restoration information saving unit due to the potential detected by the potential detection unit. If the program runaway control unit determines that the two information do not match as a result of comparison, it is determined that a program runaway has occurred, and a predetermined compensation is given to the program runaway, such as a warning to the user of the device. Do the processing.

Further, in the invention of claim 3, a timer is used at a fixed time interval measuring step in place of the potential detecting step in the case of the DC power source or the like, or in the case of the AC power source. Measure a certain time interval by using, etc., in the return information comparison small step of the return information comparison step, the return information stored in the return information storage step and the return information saved in the return information save step Compare with return information. Similarly, in the return information comparison control small step, the return information comparison small step is actually performed in synchronization with the time interval measured in the constant time interval measuring step.

Further, in the invention of claim 4, the constant time interval measuring unit in place of the potential detecting unit in the case of a DC power source, or in the AC power source, or in combination with the electric potential detecting unit sets a constant time interval. taking measurement. The synchronization signal receiving part of the return information comparing part receives a notification to that effect at every constant time interval measured by the constant time interval measuring part. Similarly, the return information comparing part receives the synchronization signal receiving part. Due to the synchronization signal, the return information stored in the return information storage unit and the return information stored in the return information saving unit are extracted and compared.

Further, in the invention of claim 5, in the dividing step, the time interval of the predetermined potential detected in the potential detecting step, for example, the frequency cycle of alternating current is divided according to a separately determined rule. The return information comparison control step causes the return information comparison step to be executed in synchronization with the time intervals divided in the division step. Also,
In the invention of claim 6, the dividing section divides the time interval of the predetermined potential detected by the potential detecting section according to a rule that is separately determined and programmed. The return information comparison control unit drives the return information comparison unit in synchronization with the time intervals divided by the division unit.

Further, in the invention of claim 7, in the comparison information storing step, the comparison information determined in accordance with each task is stored in advance in the comparison information storage section having the program runaway resistance. In the comparison information storage step, predetermined comparison information is stored from the comparison information storage unit in place of or in addition to the return information storage step of storing the return information to the task before switching or the copy information thereof and the return information saving processing step. It is taken out, copied and stored in the storage area for storage. In the comparison information comparing step, in place of or in addition to the return information comparing step of comparing the information stored in the return information storing step and the information stored in the return information saving processing step, in the comparison information storing step, it is copied and stored. Compare the given comparison information with the original information.

Further, in the invention of claim 8, the comparison information storage section having the program runaway resistance stores in advance the comparison information determined according to each task. The comparison information executing storage unit stores the comparison information during execution of the program. The comparison information storage unit, in place of or in addition to the return information storage unit and the return information saving processing unit that stores the return information or the copy information thereof to the task before switching, responds to the processing task from the comparison information storage unit. Predetermined comparison information such as is taken out, copied and stored in the comparison information executing storage unit for storage. The comparison information comparison unit is copying in the comparison information storage unit instead of or in addition to the return information comparison unit that compares the information stored in the return information storage unit and the information stored in the return information save processing unit, and the comparison information is being executed. The comparison information stored and stored in the storage unit is compared with the original information in the comparison information storage unit.

Further, in the invention of claim 9, the recovery information stored in the recovery information storing step or a program associated with the recovery information is installed in the small program recovery information storing step of the program malfunction handling step. At least one of the operating state of the device and the setting state of the initial operation by the user is stored in the runaway-resistant storage unit that is not destroyed even if a program runaway occurs. Similarly, in the small step for restart memory, the information necessary to execute the next task from the point where each task is completed is newly stored in the restart memory that has runaway resistance before executing the program. Remember. Similarly, in the continuous restart small step after the end of the runaway, the runaway is temporarily stopped by re-inserting the outlet etc. based on the information stored in the small step for storing the recovery information for recovery from the runaway and the small step for storing the memory for restart. After that, do not simply reset the program, but execute the program from the next task.

Further, in the invention of claim 10, the runaway handling return information storage portion of the program runaway handling portion is
The recovery information stored in the recovery information storage section, or at least one of the operating state and the initial setting state of the equipment equipped with the program associated therewith, is stored, and the runaway resistant memory is not destroyed even if the program runs out of control. To be stored in the department.
Similarly, the restarting storage unit having runaway resistance stores, for each task, information necessary to execute the next task anew from the point where the task ends, before the program is executed. Similarly, after the runaway, the continuation-type restart part causes the program to be executed from the next task based on the information stored in the runaway handling return information storage part and the restart storage part.

[0026]

EXAMPLES The present invention will be described below based on examples. (First Embodiment) FIG. 1 is a block diagram of a first embodiment of a program runaway detecting apparatus according to the present invention. This program runaway detection device includes a return information storage unit 101, a return information save unit 102, a task switching request unit 103, a return information save processing unit 104, a potential detection unit 105, a return information comparison unit 106, and a process. And a stop portion 107.

Then, these are created so as to be integrated with the original device control program, so that the functions can be exerted. In addition, the considerable part is RAM,
It is stored in a ROM or the like in a program-like format. Moreover, the basic part of the program is stored in a non-volatile memory or the like, and is also runaway resistant. In addition, the device body equipped with the microcomputer may have a dry battery, a storage battery or the like necessary for ensuring the minimum safety in the event of an abnormality, depending on its type, action, etc. Further, the microcomputer can use those power sources. However, since these things are so-called well-known techniques, description of their hardware and software aspects will be omitted, and their functions will be mainly described below.

The return information storage unit 101 stores the return information of the task. Here, the return information is stored in order to avoid the complexity of separately creating comparison information and storing it in a ROM or the like, and reading and storing the comparison information for comparison. It depends. Experience has also shown that program runaway is likely to occur when tasks are switched. Therefore, using return information from the viewpoint of program creation and the processing after detecting runaway. Also depends on what is convenient. The potential detector 105 detects a potential of 0 volt. Here, the 0 volt potential is detected because the program runaway can be surely detected even in the case of lightning, which is one of the important causes of ramification, and the AC power supply for home appliances. The voltage and frequency vary from country to country, but there is always 0 volt, and the lowest level event is used as much as possible (it is difficult to cause a failure, etc. Moreover, if the power supply is lost, the program processing becomes meaningless). This is a consideration. The restoration information comparison unit 106 synchronizes with the potential of 0 volt detected by the potential detection unit 105, and the restoration information storage unit 101.
And the information stored in the return information saving unit 102 are compared to determine whether or not they are the same. As a result of the comparison of the return information by the return information comparing unit 106, the processing stopping unit 107 determines that the program is out of control if they do not match, and stops the program to prevent the system from running out of control. This is because it is usually impossible for the two stored contents to change in exactly the same way in RAM. Therefore, the program runaway is surely detected.

Next, the operation of the program runaway detection device of the present embodiment constructed as described above will be described with reference to the drawings. FIG. 2 is a flowchart thereof. (Step S201) In task 1, processing 1 is performed. The contents of the return information storage unit 101 and the return information saving unit 102 at this time are conceptually shown in FIG. (Step S202) The task switching request unit 103 issues a task switching request. As a result, the processing is switched from task 1 to task 2. At this time, the return address (RET1) indicating the return position to the task 1 is stored in the return information storage unit 101. The storage means is
The existing method found in a conventional OS or the like is used. The contents of the return information storage unit 101 and the return information saving unit 102 at this time are conceptually shown in FIG.

(Step S203) When the process is switched to the task 2, the return information save processing unit 104 causes the return address (R) stored in the return information storage unit 101
ET1) is copied to the return information saving unit 102. This is the return address (RET2). The contents of the return information storage unit 101 and the return information saving unit 102 at this time are shown in FIG.
The concept is shown in.

(Step S204) The task 2 executes its own original processing. (Step S205) The potential detection unit 105 detects the potential of 0 V of the commercial power supply. (Step S206) The return information comparison unit 106 retrieves the return address (RET1) from the return information storage unit 101.

(Step S207) Return information comparison unit 10
6 is the return address (R
Take out ET2). (Step S208) The return information comparison unit 106 compares the return address (RET1) retrieved from the return information storage unit 101 in (Step S206) with (Step S2).
In 07), the return address (RET2) retrieved from the return information saving unit 102 is compared. as a result,
If they match, the process proceeds to step S209. If they do not match, the process proceeds to (step S210).

(Step S209) The processing in task 2 is continued. Then, the process proceeds to (step 204). (Step S210) If they do not match, the process stop unit 1
07 stops the program. In this embodiment, (step 206) and (step 207) may of course be reversed in order.

Further, in the present embodiment, the potential detecting section 10
Although 5 detects only the potential of 0 volt, it may detect a potential other than 0 volt, or may detect different potentials at two or more places. (Second Embodiment) FIG. 6 shows the construction of the dishwasher equipped with the program runaway detecting device according to the present invention, centering on the portion relating to the present invention. The dishwasher itself is the same as the conventional one, but prior to describing the program runaway detection device of this embodiment, a necessary part of the dishwasher will be briefly described.

In FIG. 6, reference numeral 601 denotes a cleaning tank for accommodating the tableware 602 inside and also collecting cleaning water at the bottom.
A cleaning nozzle 603 is rotatably supported and ejects cleaning water toward the tableware 602, a cleaning pump 604 sends the cleaning water to the cleaning nozzle 603, and the cleaning pump 604 is driven by a motor 605. Further, 606 is a water level detecting end for detecting the water level in the cleaning tank 601 and outputting it as an electric signal, 607 is a heater (electric heater) equipped at the bottom of the cleaning tank 601, and 608 is The thermistor is attached to the bottom of the cleaning tank 601 so as to be in close contact with the outside.
A blower fan 609 discharges the steam in the cleaning tank 601 to the outside, and the steam is discharged to the outside of the machine through an exhaust port 610. Further, reference numeral 611 is a mesh box for tableware that stores the tableware to be washed.

Next, the operation of this dishwasher will be described. The user arranges the tableware 602 in the tableware net 611, stores it in the cleaning tank 601, puts the detergent together, and then presses the operation start button (not shown). As a result, predetermined water is supplied to the bottom of the cleaning tank 601 under the action of the water level detection end 606. Next, the motor 605 and the heater 607 are energized. Next, the washing water is jetted from the washing nozzle 603 toward the tableware 602 by the washing pump 604 while being heated. At this time, the control means 612 measures the temperature of the washing water by the thermistor 608 and controls the temperature of the washing water so as to be always a constant value. Then, when the temperature of the cleaning water has reached a predetermined temperature that has been determined in advance, and when a predetermined time has elapsed from the start of cleaning, the control means 612 ends the cleaning process, and once the cleaning water is removed from the machine (tank). To discharge. Next, a rinse is performed, water is newly supplied, and an operation similar to the above-described cleaning process is performed for a few minutes, although no detergent is used, and then the water is drained. After repeating this rinsing several times, an operation called heating rinsing is performed, and when the washing water reaches a predetermined high temperature separately determined, this is finished and the drainage is performed. Finally, blower fan 60
9, the moisture in the cleaning tank 601 is discharged to the outside of the machine, and at the same time, the heater 607 is intermittently energized to heat the tableware 602,
The attached water droplets are evaporated and dried.

Next, the program runaway detection device according to the present invention will be described. As shown in FIG. 6, the program runaway detection device of the present invention includes a return information storage unit 614, a return information save unit 615, a task switching request unit 616, a return information save processing unit 617, and a potential detection unit 618. A return information comparison unit 619 and a processing stop unit 620 are provided and are connected to the control unit 612 of the dishwasher described above. The return information storage unit 614 stores task return information. The return information save unit 615 stores a copy of the information stored in the return information storage unit 614. The task switching request unit 616 requests task switching. The return information saving processing unit 617 copies the information in the return information storage unit 614 to the return information saving unit 615. The potential detection unit 618 is 0
Detect the potential of the volt. The restoration information comparison unit 619 compares the information stored in the restoration information storage unit 614 with the information stored in the restoration information saving unit 615 in synchronization with the 0 volt potential detected by the potential detection unit 618. Then
Determine if they are the same. As a result of the comparison of the return information by the return information comparing unit 619, the process stopping unit 620 stops the program if there is a mismatch, and also issues a predetermined warning sound to the user. This prevents runaway of the system.

Next, the operation of the program runaway detecting device applied to this dishwasher will be described with reference to the drawings. At this time, from the cleaning process which is a part of the process of task 1,
Description will be made assuming that the task is switched to the water supply process as the process of the task 2. FIG. 7 is a flowchart of the operation before and after this case. In this figure, (step S701) in task 1, the cleaning process is performed under the control of the control means 612. The contents of the return information storage unit 614 and the return information saving unit 615 at this time are conceptually shown in FIG.

(Step S702) Based on the program for the dishwasher, the task switching request unit 616 issues a task switching request. As a result, the processing is switched from task 1 to task 2. At this time, the return information storage unit 614 stores the return address indicating the return position to the task 1. In the case of this embodiment, 0x3
0 is stored. The storage means uses an existing method found in a conventional OS or the like. The contents stored in the return information storage unit 614 and the return information saving unit 615 at this time are conceptually shown in FIG.

(Step S703) When the process is switched to the task 2, the return information save processing unit 617 copies the return address 0x30 stored in the return information storage unit 614 to the return information save unit 615. . The contents of the return information storage unit 614 and the return information saving unit 615 at this time are conceptually shown in FIG. (Step S704) The task 2 continues the water supply to the cleaning tank 601 which is the original purpose of its own treatment.

(Step S705) Potential detection unit 618
Detects the 0 volt potential of the commercial power supply. (Step S706) The return information comparison unit 619 retrieves the return address 0x30 from the return information storage unit 614. (Step S707) The return information comparison unit 619 extracts the return address 0x30 from the return information saving unit 615.

(Step S708) Return information comparison unit 61
9 in (step S706) the return information storage unit 6
And the return address fetched from 14 (step S7
In 07), the return address retrieved from the return information saving unit 615 is compared. As a result, if they match, the process proceeds to (step S709). If they do not match, the process proceeds to (step S710). The return information storage unit 614 and the return information saving unit 6 when they match
The content of 15 is the same as that of FIG. Further, the contents of the return information storage unit 614 and the return information saving unit 615 in the case of disagreement are conceptually shown in FIG.

(Step S709) The process required for water supply in task 2 is continued. Then, (step 70
Proceed to 4). (Step S710) If they do not match, the processing stopping unit 7
07 stops the program. In addition, in this embodiment, the execution order of (step 706) and (step 707) may be reversed. Further, the task switching requesting unit 616, the potential detecting unit 618, and the processing stopping unit 620 are included in the control means 61.
If included in 2, it is also possible to use it.

Further, in the present embodiment, the potential detecting section 1
Although 05 detects only the potential of 0 V, it may detect a potential other than 0 V or detect different potentials at two or more places. As described above, according to the present embodiment, when the processing is switched from the task 1 being executed to a different task 2, the return information can be compared reliably. (Third Embodiment) FIG. 12 is a block diagram of a program runaway detecting apparatus according to the third embodiment of the present invention. The program runaway detecting apparatus of the present embodiment is provided with a clock detecting unit 1205 which detects a constant clock interval, instead of the potential detecting unit 105 in the first embodiment. Therefore, the same reference numerals are given to the same components, and the description of the configurations and operations will be omitted.

The parts unique to this embodiment will be mainly described below. First, regarding the configuration, the clock detection unit 1205
The elapsed time is detected (measured) at intervals of 4 msec. next,
The operation will be described. FIG. 13 is an operation flow chart of this embodiment, except that step 205 in FIG. 2 is replaced with step 1305 of detecting a predetermined clock interval.

From (step S201) to (step S2)
Up to 04), it is the same as in the first embodiment. (Step S1305) Clock detection unit 1205 is 4 m
The clock is detected at sec intervals. Hereafter, (step S
The steps after 206) (step S210) are the same as in the first embodiment.

In this embodiment also (step 20
The execution order of 6) and (step 207) may be reversed. Further, in this embodiment, the clock detection unit 1205
Is detected at intervals of 4 msec, but it goes without saying that time intervals other than 4 msec may be detected. Also, the previous 2
It goes without saying that the power supply may be DC, unlike the two embodiments. (Fourth Embodiment) FIG. 14 shows a dishwasher equipped with a program runaway detecting device according to the present invention. This dishwasher
The dishwasher of the second embodiment shown in FIG. 6 is different in that a clock detection unit 1418 for detecting a constant clock interval is provided instead of the potential detection unit 618. Therefore, the same reference numerals are given to parts having the same configuration, and the description of the configuration, operation, etc. will be omitted.

The parts unique to this embodiment will be mainly described below. The clock detection unit 1418 detects at 4 msec intervals. Next, the operation will be described. FIG. 15 is a flowchart thereof, but similar to FIG. 7, it is assumed that the cleaning, which is a part of the process of task 1, is switched to the water supply as the process of task 2. (Step S701) to (Step S704) are the same as those in the second embodiment.

(Step S705) Clock detector 14
18 detects the clock at 4 msec intervals. Less than,
(Step S706) to (Step S710) are the same as those in the second embodiment. Note that the execution order of (step 706) and (step 707) may be reversed in this embodiment as well.

When the task switching requesting unit 616, the potential detecting unit 618, and the processing stopping unit 620 are included in the control means 612, they can be used. Further, in this embodiment, the clock detection unit 1205 has four
Although detection is performed at msec intervals, it goes without saying that time intervals other than 4 msec may be used. As described above, according to the present embodiment, when the processing is switched from the task 1 being executed to the task 2 different from the task 1, the return information can be reliably compared in synchronization with the clock. .

Since the clock interval to be detected can be changed programmatically, the runaway detection process can be performed at any interval. (Fifth Embodiment) FIG. 16 is a block diagram of the fifth embodiment of the program runaway detecting apparatus according to the present invention. In addition to the configuration of the first embodiment shown in FIG. 11, the program runaway detection apparatus of the present embodiment changes the time represented by the potential interval detected by the potential detection unit 105 to a different time interval by a timer or the like. The difference is that a dividing unit 1601 for dividing is provided. Therefore, also in the present embodiment, the configuration, operation, and the like will be described mainly for the unique portion. First, regarding the configuration, the potential detection unit 105 detects a potential of 0 volt. 6
If the frequency band is 0 Hz, one cycle is about 16 msec.
Therefore, the potential interval detected by the potential detection unit 105 is about 8 msec. The dividing unit 1601 divides the time represented by the potential interval detected by the potential detecting unit 105 into four by activating a timer and generating an interrupt about every 2 msec.

Next, the operation will be described. Figure 17
The operation from (step S201) to (step S204) is the same as in the first embodiment. (Step S1705) The potential detection unit 105 detects the potential of 0 volt of the commercial power supply, or detects a timer interrupt by the timer activated by the division unit 1601.

(Step S1701) Potential detecting section 105
Detects 0 volt, the process proceeds to step S1702. If it is a timer interrupt by the dividing unit 1601, the process proceeds to (step S206). (Step S1702) The dividing unit 1601 activates a timer in order to generate a timer interrupt every 2 msec. After activation, the process proceeds to (step S206).

Hereinafter, (step S206) to (step S210) are the same as in the first embodiment. In addition,
Also in this embodiment (step 206) and (step 2)
In 07), the execution order may be reversed. Further, the potential detection unit 105 detects only the potential of 0 volt, but it goes without saying that it may detect a potential other than 0 volt or detect different potentials at two or more locations.

Further, in this embodiment, the dividing unit 160
1 detected the timer at 2msec intervals, but 1ms
ec interval, 4 msec interval, 12 msec interval, etc. 2
The interval may be different from msec. (Sixth Embodiment) FIG. 18 shows a dishwasher equipped with a program runaway detecting device according to the present invention. This dishwasher
The point that the dishwasher of the second embodiment shown in FIG. 6 is provided with a dividing unit 1601 that divides the time represented by the interval of the potential detected by the potential detecting unit 105 into different time intervals by a timer or the like. different. Therefore, like the fourth embodiment and the like, only the unique parts will be described.

First, with the configuration, the potential detecting section 105 detects a potential of 0 volt. In the case of the frequency band of 60 Hz, one cycle is about 16 msec, and therefore the potential interval detected by the potential detection unit 105 is about 8 msec.
Is. The dividing unit 1601 divides the time represented by the potential interval detected by the potential detecting unit 105 into four by activating a timer and generating a timer interrupt about every 2 msec.

Next, the operation of this embodiment will be described. FIG.
11 is a flow chart thereof, and it is assumed that the cleaning, which is a part of the process of task 1 as in FIG. 11, is switched to the water supply as the process of task 2, (step S
The steps from 701) to (step S704) are the same as in the second embodiment.

(Step S1705) Potential detector 618
Detects the 0 volt potential of the commercial power supply. Alternatively, a timer interrupt by the timer activated by the dividing unit 1801 is detected. (Step S1701) When the electric potential detection part 105 detects 0 volt, it progresses to (step S1702). Also,
If it is a timer interrupt by the dividing unit 1801, the process proceeds to (step S706).

(Step S1702) Dividing Unit 1801
Activates the timer in order to generate a timer interrupt every 2 msec. After startup (step S706)
Proceed to. Hereinafter, the steps (Step S706) to (Step S710) are the same as those in the second embodiment. In addition, also in the present embodiment, (step 706) and (step 70
The execution order of 7) may be reversed.

If the task switching requesting unit 616, the potential detecting unit 618, and the processing stopping unit 620 are included in the control means 612, they can be used.
Further, in the present embodiment as well, the potential detection unit 105 detects only the potential of 0 volt, but it may detect a potential other than 0 volt or detect different potentials at two or more places.

As described above, according to the present embodiment, when the processing is switched from the task 1 being executed to the task 2 different from the task 1, the return information can be surely compared and the program runaway can be performed. The detection interval can be easily changed to any time interval. Therefore, the conventional problems can be reduced well,
In addition, the detection interval can be easily changed, and a highly reliable program runaway detection device can be obtained. (Seventh Embodiment) This embodiment is basically the same as the first embodiment. However, it is different in that it has a comparison information storage unit, a comparison information execution storage unit, a comparison information storage unit, and a comparison information comparison unit. Therefore, only these specific configurations will be described, and the configuration diagrams are omitted because the contents are simple.

The comparison information storage unit stores, in the non-volatile memory, the comparison information corresponding to each step and having a larger amount than the return information, which is created at the time of creating the program main body. The comparison information executing storage unit is made so that the comparison information corresponding to each task can be stored in the volatile memory used during execution of the program body.

The comparison information storage unit stores the
The comparison information corresponding to the task before switching is taken out from the comparison information storage unit and copied, and stored and stored in a predetermined address of the comparison information executing storage unit. The comparison information comparison unit compares the comparison information corresponding to the task before the switching of the comparison information storage unit with the storage information in the storage information execution storage unit each time the AC power source becomes 0 bottle, and if they do not match each other. If there is, it is judged as a program runaway.

Now, the probability that the comparison information, which is larger than the return information, changes completely the same is lower. For this reason, runaway of equipment that is more important than those usually used at home, such as a washing machine for business use, and the accompanying damage such as excessive washing and excessive heating of very expensive and easily damaged clothes such as silk fabric. It is possible to ensure the prevention of secondary damage. (Eighth Embodiment) This embodiment is basically the same as the first embodiment. However, it is different in that it has a recovery information recovery information storage unit, a restart storage unit, and a restart type restarting unit after the runaway. Therefore, only these specific configurations will be described.

The runaway countermeasure return information storage unit is composed of a non-volatile memory and stores the current operating state of the home electric appliance and return information to the previous task. The memory for restart is created for each task together with the information, program, etc. necessary for executing the next task from the point where the task is finished, when the program itself is created. It is stored in memory.

When it is judged that the program is in a runaway state, the continuation-type restart section after the runaway is reset by temporarily stopping the program, and then, based on the information stored in the runaway handling recovery information storage section, The user's initial setting value is acquired, necessary information is read from the restart storage unit, and the task when the runaway occurs is restarted. As a result, it is possible to effectively deal with a power supply stoppage or the like in a home electric appliance for some reason. Specifically, in the VTR, after the power is restarted, the pre-roll of the recording tape and the accompanying storage position compensation are automatically performed, and the scene from the scene immediately before the outlet is disconnected is displayed on the CRT.

In the present embodiment, the elapsed time until the runaway occurrence time of the task at the time of the runaway occurrence is not taken into consideration, but this must be continuously known by a separate timer and stored in the non-volatile memory. Therefore, the time already spent may be omitted. Thereby, in a microwave oven or the like, excessive heating of food can be prevented.

In the case of an air conditioner or the like, even when the re-insertion of the outlet and the restart of the device due to the restoration of the power supply, the protective measures of the device such as continuing the stop for several minutes to make the refrigerant steady are incorporated programmatically. Good. Although the present invention has been described above based on the embodiments, it goes without saying that the present invention is not limited to the above embodiments. That is, you may do as follows.

(1) For the convenience of manufacturing or the like, a plurality of essential components (requirements, matters) of the present invention may be physically or mechanically composed, or conversely, a plurality of components may be integrated, or appropriately. Combining these. (2) In all the embodiments, the case where one task is switched is shown. However, when a plurality of task switches are performed, there are a plurality of pieces of return information to be compared. , I try to compare all. Further, arbitrary return information is compared, or sequentially compared.

(3) The operations of the inventions of the claims are made at the same time.

[0071]

As described above, according to the present invention, the predetermined potential of the power source is detected and the return information is compared in synchronization therewith, so that it is related to the operating state of the program. It can detect runaway without fail. Further, since the predetermined potential of the AC power supply is detected, it is possible to easily set the cycle for performing the runaway detection. Therefore,
The reliability of program runaway detection is improved.

Further, when the return information is compared in synchronization with the clock (clock, hour signal), it is not necessary to detect a predetermined potential of the power source, so the comparison interval can be arbitrarily changed. Therefore, the program runaway detection interval can be corrected to an arbitrary time interval on the program, and the reliability of the program runaway detection is improved. In addition, a predetermined potential of the AC power supply is detected, and a timer (time measuring means) or the like is also used,
When dividing into time intervals different from the time interval represented by the interval of the detected potential and comparing the return information in synchronization with this, the runaway detection cycle becomes dense and, of course, the operating state of the program Runaway detection can be performed regardless.

Therefore, the reliability of program runaway detection is further improved. Also, by using the comparison information,
The reliability of program runaway detection is improved. In addition, in household electric appliances, it is possible to effectively deal with erroneous operation by the user.
Due to the above effects, the practical value and effect are extremely large.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of a program runaway detection device according to the present invention.

FIG. 2 is an operation flow chart of the program runaway detection apparatus of the above embodiment.

FIG. 3 is a conceptual diagram of the contents of a return information storage unit and the contents of a return information save unit before switching tasks.

FIG. 4 is a conceptual diagram of the contents of the return information storage unit and the contents of the return information save unit immediately after the task switching.

FIG. 5 is a conceptual diagram of the contents of the restoration information storage unit and the contents of the restoration information saving unit immediately after copying the contents of the restoration information storage unit to the restoration information saving unit by the restoration information saving processing unit.

FIG. 6 is a block diagram of a dishwasher adopting the program runaway detection device of the first embodiment (second embodiment).

FIG. 7 is an operation flow chart of the program runaway detection apparatus as the second embodiment.

FIG. 8 is a conceptual diagram of the contents of the return information storage unit and the contents of the return information save unit before the task switching.

FIG. 9 is a conceptual diagram of the contents of the return information storage unit and the contents of the return information save unit immediately after switching tasks.

FIG. 10 is a conceptual diagram of the contents of the return information storage unit and the contents of the return information saving unit immediately after copying the contents of the return information storage unit to the return information saving unit by the return information saving processing unit.

FIG. 11 is a conceptual diagram of the contents of the restoration information storage unit and the contents of the restoration information saving unit when the restoration information comparison unit determines that they do not match.

FIG. 12 is a third program runaway detecting device according to the present invention.
It is a block diagram of an Example.

FIG. 13 is a flowchart showing the operation of program runaway detection in the above embodiment.

FIG. 14 is a block diagram of a dishwasher adopting the program runaway detection device of the third embodiment (fourth embodiment).

FIG. 15 is an operation flow chart of the program runaway detection apparatus as the fourth embodiment.

FIG. 16 is a fifth example of the program runaway detection device according to the present invention.
It is a block diagram of an Example.

FIG. 17 is an operation flow chart of program runaway detection of the above-described embodiment.

FIG. 18 is a configuration diagram of a dishwasher adopting the program runaway detection device as the fifth embodiment (sixth embodiment).

FIG. 19 is an operation flowchart of the program runaway detection device as the sixth embodiment.

[Explanation of symbols]

 101 Recovery Information Storage Section 102 Recovery Information Saving Section 103 Task Switching Request Section 104 Recovery Information Saving Processing Section 105 Potential Detection Section 106 Recovery Information Comparison Section 107 Processing Stopping Section 601 Cleaning Tank 602 Dishware 603 Cleaning Nozzle 604 Cleaning Pump 605 Motor 606 Water Level Sensor 607 Heater 608 Thermistor 609 Blower fan 610 Exhaust outlet 611 Basket 612 Control means 613 Calculation means 614 Return information storage section 615 Return information save section 616 Task switching request section 617 Return information save processing section 618 Potential detection section 619 Return information comparison section 620 Processing stop unit 1205 Clock detection unit 1418 Clock detection unit 1601 Dividing unit 1801 Dividing unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keiko Iwamoto 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Wataru Uchiyama 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (10)

[Claims] 1. A program capable of processing a plurality of tasks according to a program, storing information necessary for returning to the original task when switching the tasks, and detecting runaway of the program by using the information. In the runaway detection method, the task switching request step that requests switching of processing from the task currently being processed to the next task and the return information to the task before switching when the task being processed is switched to a different task. And a return information saving processing step of copying the return information stored in the return information storing step and storing it in a return information saving unit that uses an area different from that of the return information storing step. And a potential detection step of detecting a predetermined potential of the AC power source, and a predetermined potential detected in the potential detection step. As a cause, a return information comparison step of comparing the return information stored in the return information storing step with the return information stored in the return information saving processing step, and the result of the comparison in the return information comparing step, A program runaway detection method comprising: a program runaway handling step of determining that a program runaway has occurred if the two pieces of information do not match and performing a predetermined compensation process for the program runaway. 2. A program capable of processing a plurality of tasks according to a program, storing information necessary for returning to the original task when switching the tasks, and detecting runaway of the program using the information. In the runaway detection device, a task switching request unit requesting switching of processing from a task currently being processed to a next task, and when a task being executed is switched to a different task by a request of the task switching request unit, A return information storage unit that stores return information to the task before switching, a return information save unit that uses a storage area different from the return information storage unit, and copy the return information stored in the return information storage unit. The recovery information saving processing unit for storing the recovery information in the recovery information saving unit, the potential detecting unit for detecting a predetermined potential of the AC power supply, and the voltage detected by the potential detecting unit. A return information comparison unit that compares the return information stored in the return information storage unit with the return information stored in the return information saving unit, and a comparison of both information by the return information comparison unit. If the results do not match, it is judged that a program runaway has occurred,
A program runaway detection device comprising: a program runaway handling unit that performs a predetermined compensation process for a program runaway. 3. A constant time interval measuring step for measuring a constant time interval in place of or in addition to the potential detecting step, and the return information comparing step is stored in the return information storing step. The return information comparison small step of comparing the return information and the return information stored in the return information saving step, and the return information comparison small step in synchronization with the time interval measured in the constant time interval measurement step. 2. The program runaway detection method according to claim 1, further comprising a small step of return information comparison control that is actually performed. 4. A constant time interval measuring unit for measuring a constant time interval in place of or in addition to the potential detecting unit, wherein the return information comparing unit is configured to measure the constant time interval measured by the constant time interval measuring unit. The synchronization signal receiving portion that receives a notification to that effect at each interval, and the restoration information stored in the restoration information storage portion and stored in the restoration information saving portion due to the synchronization signal received by the synchronization signal receiving portion. 3. The program runaway detecting device according to claim 2, further comprising a return information comparing portion for extracting and comparing the present return information. 5. A division step of dividing a time interval of a predetermined potential detected in the potential detection step according to a separately determined rule, and the return information comparing step in synchronization with the time interval divided in the division step. And a return information comparison control step for executing.
The program runaway detection method described. 6. A division unit that divides a time interval of a predetermined potential detected by the potential detection unit according to a separately determined rule, and the return information comparison unit in synchronization with the time interval divided by the division unit. 3. The program runaway detection device according to claim 2, further comprising a return information comparison control unit to be driven. 7. A comparison information storage step of pre-storing comparison information determined according to each task in a comparison information storage section having program runaway resistance, and return information to the task before switching or copy information thereof. In place of or in addition to the return information storing step to store and the return information saving processing step, predetermined comparison information is taken out from the comparison information storage unit, copied, stored in a storage area, and stored, The original information based on the comparison information stored after copying in the comparison information storing step instead of or in addition to the return information comparing step for comparing the information stored in the return information storing step and the return information saving processing step And a comparison information comparing step of comparing with (1), (3) or (3). Program runaway detection method described. 8. A comparison information storage section having program runaway resistance for storing comparison information determined in accordance with each task in advance, a comparison information execution storage section for storing comparison information during program execution, and the switching. In place of or in addition to the return information storage unit and the return information save processing unit for storing the return information to the previous task or the copy information thereof, predetermined comparison information is taken out from the comparison information storage unit, copied, and copied. Instead of or in addition to the comparison information storage unit for storing and storing the comparison information in progress storage unit and the return information comparison unit for comparing the information stored in the return information storage unit and the return information save processing unit, And a comparison information comparison unit for comparing the comparison information stored in the comparison information execution storage unit and copied and stored in the comparison information storage unit with the original information. 7. The program runaway detection device according to claim 2, claim 4, or claim 6. 9. The program runaway countermeasure step includes program runaway resistance for at least one of an operation state and an initial setting state of a device equipped with the return information stored in the return information storing step or a program associated therewith. The small step for storing the reckless run-away recovery information stored in the run-away-resistant storage unit and the information necessary for executing the next task from the point where the task is completed for each task are stored in advance in advance. Based on the information stored in the restart storage small step to be stored in the restart storage unit having runaway property, the runaway handling recovery information storage small step and the restart storage small step, The method further comprises a small step of continuous restart after the runaway for executing a program from a task. The program runaway detection method according to claim 2 or claim 5. 10. The program runaway coping unit stores at least one of an operation state and an initial setting state of a device equipped with the return information stored in the return information storage unit or a program associated therewith, In addition, the runaway handling return information storage part to be stored in the runaway resistant storage part having program runaway resistance and the information necessary for executing the next task for each task from the point where the task is completed are stored in the program execution. A program is stored from the next task based on information stored in advance in advance, which has a runaway-resistant storage part for restart, and the runaway-handling recovery information storage part and the restart storage part. 7. The program runaway according to claim 2, claim 4 or claim 6, further comprising: a continuous restarting part after the runaway to be executed. Running detection method.