JPH09223025A - Real-time control device and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for dividing the processing of lower priority to finish it within a prescribed period and thereby to facilitate the design and development of a program by starting the processing of higher priority by means of the interruption accompanying occurrence of a single type of asynchronous events and carrying out again the processing of lower priority that is interrupted after the end of the processing of higher priority at the interruption time point. SOLUTION: A processing level management part 106a receives a processing switching request from a processing switching request part 105, discriminates the processing to be carried out after the processing is switched based on the contents stored in an executing processing storage part 102, a waiting processing storage part 103 and a processing level storage part 104, and instructs a processing state management part 106b for the processing to be carried out. Thus, the part 106b takes a necessary module out of a control processing module storage part 101 and carries out the instructed processing. Then, the part 106b detects the end of the processing and notifies the part 106a of this end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a real-time control device and method in a microcomputer system for controlling appliances such as home electric appliances by utilizing an interrupt caused by one kind of interrupt factor generated at a predetermined cycle.

[0002]

2. Description of the Related Art In recent years, in controlling home electric appliances and the like using a microcomputer system, there are many cases in which corresponding processing such as acquisition of key press information by a user and detection of a value by a sensor must be performed in real time. To do. In order to deal with them, real-time control is indispensable with limited resources such as microcomputers embedded in home appliances.

As an example of a conventional real-time control method in the field of home electric appliances, there is a method realized by a program loop (hereinafter referred to as "loop method"). The loop method will be described below. FIG. 21 is a flow chart showing the processing contents of a program incorporated in a microcomputer system for performing real-time control using the loop method.

In the figure, the circuit control processing is hardware control such as input / output of a port, which is started at a time interval determined for each piece of hardware to be controlled and ended within a limited time. This is a process that must be done. The sequence control process is a control such as data setting other than hardware, and is a process that does not have a fixed time interval of start-up or a processing time limit and may be sequentially performed.

In this example, an interrupt is used as the timing for starting the circuit control process, and the time limit for the circuit control process is until the next interrupt occurs. In order to generate an interrupt, there are a method of using a timer to generate a timer interrupt, a method of detecting an AC power supply voltage and generating interrupts at equal intervals, and the like. Since the time limit of the circuit control processing must be strictly adhered to in order for the device to operate normally, the circuit control processing must be executed prior to the sequence control processing. Therefore, the sequence control process is divided and programmed in advance so that the sequence control process is interrupted before the interrupt occurs and the interrupt is awaited. When an interrupt occurs (S211: Yes), the circuit control process is first performed (S212 to S214), and the sequence control process is performed after the circuit control process is completed (S215).

FIG. 22 is a flowchart showing the detailed processing contents of the sequence control processing. As described above, the sequence control process is performed after the predetermined circuit control process is completed.
The program is divided into multiple processing units that can be executed within the time until the next interrupt occurs. Therefore, in this example, the sequence control is divided into sequence control 1 to sequence control 4, and the sequence control to be performed is determined by referring to the value of the counter (CNT) in the program.

[0007]

However, when the above loop method is used, the sequence control processing is divided when the program of the microcomputer system is developed. Therefore, the operation of the equipment is studied in detail and the program is designed. I had to. That is, sequence control 1 to
After completing the circuit control processing, the sequence control 4
In order to design the program so that it will finish before the next interrupt occurs, the time until the next interrupt occurs must be calculated and the processing contents for each execution must be determined. It had a problem that it required a very complicated examination.

Further, in order to control the processing of a plurality of priorities, it is possible to use a real-time control device having a circuit capable of multistage interruption. In that case,
It has a problem that it causes an increase in manufacturing cost of the microcomputer system. In view of the above problems, a first object of the present invention is to provide a real-time control device and method that can easily design and develop a program for performing real-time processing. A second object of the present invention is to keep the manufacturing cost of the microcomputer system low,
An object of the present invention is to provide a real-time control device and method capable of controlling processing of a plurality of priorities.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 uses an interrupt due to one kind of interrupt factor generated at every predetermined cycle,
A real-time control device in a microcomputer system for controlling equipment, which is a process identifier for the highest-priority process programmed to end within the predetermined cycle and the process having other priorities And a priority, a process priority storage unit, an execution process storage unit that stores an identifier of a process being executed, an identifier of a process whose execution is interrupted, and information indicating a status of the process at the time of interrupt. Standby processing storing means for storing, processing switching requesting means for outputting a processing switching request in response to the occurrence of the interrupt, and receiving the processing switching request, interrupting the processing being executed and giving the highest priority The first control means for starting the execution of the executed processing and updating the contents of the execution processing storage means and the standby processing storage means, and detecting the end of the processing. In the comparison between the comparison means and the comparison means for comparing the priority of the processing having the next highest priority after the completed processing with the priority of the processing having the identifier last stored in the standby processing storage means. When the former is higher, the second control means for starting the execution of the former processing and updating the contents of the execution processing storage means and the comparing means are compared with each other. Alternatively, when the priorities of the two are equal, the latter process is restarted from the interruption point based on the information indicating the status of the process at the time of interruption stored in the standby process storage unit, and the execution process storage unit and the And a third control means for updating the contents of the standby processing storage means.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a real-time control device in a microcomputer system for controlling a device by utilizing an interrupt due to one kind of interrupt factor generated at a predetermined cycle. Processing priority storage means for storing processing identifiers and priorities of the highest priority processing programmed to end within the predetermined cycle and the processing having other priorities; Execution process storage means for storing the identifier of the process being executed, standby process storage means for sequentially storing the identifier of the process whose execution has been interrupted and information indicating the status of the process at the time of interruption, and receiving the occurrence of the interrupt. A process switching request means for outputting a process switching request, and receiving the process switching request,
First control means for interrupting the processing being executed, starting the execution of the processing assigned the highest priority, updating the contents of the execution processing storage means and the standby processing storage means, and ending the processing And a comparison means for comparing the priority of the processing with the second highest priority after the completed processing with the priority of the processing having the identifier last stored in the standby processing storage means; In the comparison of the means, when the former is higher, in the comparison of the second control means for starting the execution of the former processing and updating the contents of the execution processing storage means and the comparison means, the former Is low or both have the same priority, the latter process is restarted from the interruption point based on the information indicating the status of the interruption process stored in the standby process storage means, and the execution process is performed. And a third control means for updating the 憶 means and the contents of the standby processing storage unit.

The processing priority storing means stores the identifier and the priority of the processing for the highest priority processing programmed to end within a predetermined interrupt generation cycle and the processing having other priorities. And remember. The execution process storage means stores the identifier of the process being executed. The standby process storage means sequentially stores information such as an identifier of a process whose execution has been interrupted, the contents of a register indicating the execution status of the process at the time of interruption, and the address of the program.

The processing switching request means outputs a processing switching request upon receipt of an interrupt due to one type of interrupt factor. In response to the process switching request, the first control unit interrupts the process being executed, starts executing the process assigned the highest priority, and the execution process storage unit and the standby process storage unit. Update the contents of. As described above, the process with the highest priority ends within a predetermined interrupt cycle. That is, since the program is programmed to end before the occurrence of the interrupt, the process interrupted by the first control means is a process other than the process having the highest priority. Therefore, when outputting the process switching request,
The highest priority process will always be executed.

The comparing means, when detecting the end of the processing, compares the priority of the processing with the next highest priority with the processing that has ended,
The priority of the process having the identifier last stored in the standby process storage means is compared. The second control means, in the comparison by the comparison means, starts execution of a process having a higher priority next to the completed process when the process having a higher priority next to the completed process has a higher priority. At the same time, the contents of the execution process storage means are updated.

The third execution means, in the comparison by the comparison means, when the priority of the processing having the next highest priority after the completed processing is lower or the priority of both is equal, the waiting processing is performed. The process given the identifier last stored in the storage means is restarted from the point of interruption based on the contents of the register indicating the status of the process at the time of interruption stored in the standby process storage means, the program address, etc. At the same time, the contents of the execution process storage means and the standby process storage means are updated.

As described above, the priority of the process having the second highest priority after the completed process is compared with the priority of the process to which the identifier last stored in the standby process storage means is compared, By determining the processing to be executed, it becomes possible to control the processing to which the priority is assigned in a plurality of stages by one type of interrupt factor. Further, in the invention according to claim 2, in the real-time control device according to claim 1, when the end of the process is detected, the contents of the process priority storage means are referred to, and the priority is given to the completed process. Has a determination means for determining whether or not there is a low process, the comparison means, when it is determined by the determination means,
The priority of the process having the second highest priority after the completed process is compared with the priority of the process having the identifier last stored in the standby process storage means.

When the end of processing is detected, the determination means refers to the contents of the processing priority storage means and determines whether or not there is a processing having a lower priority than the completed processing. The comparing means performs control such as ending the control of the device when there is no processing having a lower priority than the ended processing by comparing the priorities of the processing when the judging means judges that the processing exists. It becomes possible.

The invention described in claim 3 is the first invention.
Alternatively, in the real-time control device according to 2, the process of controlling the device is classified into two levels of priority depending on the content of the control, and the process classified into the higher priority is
The processing classified into the one with lower priority includes the processing strictly required in real time, and the processing other than that is included.

The invention described in claim 4 is the first invention.
Alternatively, in the real-time control device according to 2, the process of controlling the device is classified into three priority levels according to the control content, and the process classified as the highest priority is the input / output process with the port. And the increment process of the counter, which is the basic unit for counting the time of the timer, and the processes classified as the next highest priority are the timer timing process, the port output refresh process, and the input from the port. It includes a process that needs to be performed on the data and a process that creates data to be output to the port.

The invention described in claim 5 is the same as claim 1.
In the real-time control device according to any one of items 1 to 4, the process switching request unit receives a timer interrupt and outputs a process switching request. The invention according to claim 6 is the real-time control device according to any one of claims 1 to 4, further comprising interrupt generating means for generating an interrupt by detecting a cycle of the AC power supply voltage.

The invention described in claim 7 is the first invention.
In the real-time control device according to any one of 1 to 6, the first control unit overwrites the content of the execution process storage unit with the identifier of the process having the highest priority. The invention according to claim 8 is the real-time control device according to any one of claims 1 to 7, wherein the standby process storage means has a stack structure, and
The control means adds the identifier of the interrupted processing and the information indicating the status of the processing at the time of interruption to the standby processing storage means.

The invention described in claim 9 is the same as claim 1.
The real-time control device according to any one of items 1 to 8 is characterized by being provided in a microcomputer system for controlling home electric appliances. According to a tenth aspect of the present invention, there is provided a real-time control method in a microcomputer system for controlling a device by using an interrupt caused by one type of interrupt factor that occurs every predetermined period. A process switching request step for receiving and outputting a process switching request; a first execution step for receiving the process switching request, interrupting the process being executed, and starting the process of the highest priority; When the end of a process is detected, if there is a process with the next highest priority after the completed process, the priority of the process with the next highest priority after the completed process and the priority of the process that was interrupted recently And a second execution step of starting execution of the former process when the former is higher in the comparison step, and the comparison step. Or the former is lower, or if the same priority of both and a third execution step resumes latter processing from the interrupted time point.

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of a real-time control device according to a first embodiment of the present invention. The real-time control device in FIG. 1 includes a control processing module storage unit 101, an execution processing storage unit 102, a standby processing storage unit 103, a processing level storage unit 104, a processing switching request unit 105, and a control unit 106.

The control processing module storage unit 101 comprises a stroke control processing module storage unit 101a, a priority circuit control processing module storage unit 101b, and a normal circuit control processing module storage unit 101c. The process control processing module storage unit 101a stores a module for performing process control processing. Here, the stroke control process corresponds to the sequence control process when the conventional technique is described, and there is no time interval for activating the process or limitation of the process time, and the process proceeds according to a predetermined execution procedure. This is a process that can be performed.

As a concrete example of the stroke control processing, in the case of a washing machine, "setting stroke processing" for setting various washing courses, "washing stroke processing" for supplying water and stirring, and "rinsing for rinsing""Processprocessing","dewateringprocess" for draining and dehydrating, and in the case of a microwave oven, "setting process" for selecting a cooking course, "cooking process" for performing various types of cooking, etc. Is mentioned.

Priority circuit control processing module storage unit 101
A module for performing priority circuit control processing is stored in b. Here, the priority circuit control control process corresponds to the circuit control process when the conventional technique is described, and is a process that needs to be started at a predetermined time interval and ended within a limited time. That is. As described in the description of the prior art, the time limit for the execution of the priority circuit control process must be strictly adhered to in order for the device to operate normally, and therefore must be executed with priority over the stroke control process. I won't.

Priority circuit control processing module storage unit 101
Specifically, b stores a module that performs a process related to input / output to / from a port and a module that performs a process related to increment of a counter, which is a basic unit when the timer counts. Specific examples of input processing from the port include detection of key press and acquisition of a value from a sensor.

As a concrete example of the output processing to the port, L
Examples include display on the ED, activation of the motor, activation of the heater, and the like. Normal circuit control processing module storage unit 101c
A module for performing normal circuit control processing is stored in. Here, the normal circuit control process is a process that does not require strict control of the cycle to be executed as much as the priority circuit control process, but needs to be executed with priority over the process control process.

Normal circuit control processing module storage unit 101
Specifically, c includes a module that performs timer timing processing, a module that performs port output refresh processing, a module that performs processing that needs to be performed on data input from the port, and an output to the port. A module that performs a process of creating data to be stored is stored. The timer timing process is a process of incrementing a timer prepared by the user based on the value of the counter incremented in the priority circuit control process. For example, when the counter is incremented at intervals of 1 millisecond (1 / 1000th of a second), when counting the timer in units of 1 second, the timer is incremented once when the counter is incremented 1000 times. .

The port output refresh processing is LE
After the display on D, the output data is periodically output to the port, for example, re-outputting is periodically performed to prevent the display from flickering. As the processing that needs to be performed on the data input from the port, for example,
In the microwave oven, when the temperature sensor detects that the temperature inside the refrigerator has risen excessively, the cooling fan is started immediately.

As the process of creating the data to be output to the port, in the case of scrolling the character string, the process of creating the character data to be displayed in order to make it look like the characters are scrolling in the limited display area. And so on. The execution process storage unit 102 corresponds to the execution process storage unit in the invention described in the claims. The execution process storage unit 102 stores the identifier of a process being executed (hereinafter,
"Execution identifier") is stored. The processing identifier will be described later.

The standby process storage unit 103 corresponds to the standby process storage means in the invention described in the claims. When the control unit 106 receives a process switching request from the process switching requesting unit 105, the standby processing storing unit 103 stores
The execution identifier stored in the execution process storage unit 102 is stored in a saved form. In addition, various information indicating the status at the time of processing interruption, such as the contents of registers and the like at the time of processing interruption, the address of a program, etc., is also stored in the form of being saved at the same time. Therefore, the standby process storage unit 103 has a stack structure and is configured to be able to sequentially store a plurality of identifiers and the above-mentioned information.

The processing level storage unit 104 corresponds to the processing priority storage means in the invention described in the claims. The processing level storage unit 104 includes a process control processing module storage unit 101a that constitutes the control processing module storage unit 101 and a priority circuit control processing module storage unit 101.
b, the identifiers indicating the processes performed by the modules stored in the normal circuit control processing module storage unit 101c, and the priority of the processes having the respective identifiers are stored.

FIG. 5 shows the data structure of the processing level storage unit 104. As shown in the figure, for example, the process performed by the module stored in the process control processing module storage unit 101a is given an identifier "process control process" and is associated with the priority of the process. It is stored. Here, as for the priority, the smaller the number, the higher the priority.

The process switching request unit 105 corresponds to the process switching requesting means in the invention described in the claims. The process switching request unit 105 receives the one type of asynchronous event and outputs a process switching request to the control unit 106. Examples of asynchronous events include timer interrupts and interrupt signals that are output by detecting periodic changes in power supply voltage.

The control unit 106 corresponds to the first control means, the determination means, the comparison means, the second control means, and the third control means in the invention described in the claims. Control unit 10
6 is a processing level management unit 106a and a processing state management unit 1
06b and. Upon receiving the process switching request from the process switching requesting unit 105, the processing level management unit 106 a receives the execution process storing unit 102 and the standby process storing unit 103.
And the contents stored in the processing level storage unit 104 to determine the processing to be executed after the processing switching,
Based on the determination result, the processing state management unit 106b is instructed of the processing to be executed, and the contents of the execution processing storage unit 102 and the standby processing storage unit 103 are updated.

When the processing is completed, the processing level management unit 106a receives a notification of the processing completion from the processing state management unit 106b, and the execution processing storage unit 102, the standby processing storage unit 103, and the processing level. The content stored in the storage unit 104 is referred to, the next process to be executed is determined, and based on the result of the determination, the process state management unit 106b is instructed of the process to be executed. The contents of the execution process storage unit 102 and the standby process storage unit 103 are updated.

The processing state management unit 106b receives the instruction of the processing to be executed from the processing level management unit 106a, extracts the necessary module from the control processing module storage unit 101, and executes the processing. Further, the processing state management unit 106
b detects the end of processing, and the processing level management unit 106a
To notify the end of the process.

FIG. 2 is a flowchart showing the processing contents when the control unit 106 receives a processing switching request from the processing switching requesting unit 105. First, the processing level management unit 106a receives a processing switching request from the processing switching requesting unit 105 (S201). Processing level management unit 1
06a extracts the execution identifier stored in the execution process storage unit 102 and stores it in the standby process storage unit 103 (S202).

Next, the processing level management unit 106a refers to the processing priority and the identifier stored in the processing level storage unit 104, and stores the identifier of the highest priority processing in the execution processing storage unit 102. It is stored (S203). The processing level management unit 106a sets the priority of the processing having the execution identifier and the priority of the processing having the processing identifier last stored in the standby processing storage unit 103 (hereinafter, referred to as “latest standby identifier”). The comparison is made (S204). When the priority of the process having the execution identifier is higher than the priority of the process having the latest waiting identifier, the process level management unit 106a instructs the process state management unit 106b to start executing the process having the execution identifier. Give instructions to them. Processing state management unit 1
In response to the instruction from the processing level management unit 106a, 06b starts executing the processing having the execution identifier (S20).
5). Specifically, after saving the contents of registers and the like used in the process being executed in the standby process storage unit 103, a module for performing a process having an execution identifier is provided from the control process module storage unit 101. Take out and execute.

Here, if the control unit 106 receives a process switching request from the process switching requesting unit 105 during execution of the process having the execution identifier, step S201.
Is performed. When the processing state management unit 106b detects the end of the executed processing before the control unit 106 receives the processing switching request from the processing switching request unit 105 (S206: Yes), the processing state management unit 106 is detected.
b notifies the processing level management unit 106a of the end of processing. The processing level management unit 106a receives the notification from the processing state management unit 106b and receives the processing level storage unit 104.
By referring to the contents stored in, it is checked whether or not there is a process having a lower priority than the completed process (S20).
7). If there is no process having a lower priority than the completed process, the control unit 106 ends the control (S20).
7: No).

When there is a process having a lower priority than the completed process, the process level management unit 106a determines the identifier of the process having the next highest priority after the completed process as the execution identifier stored until then. Instead of the execution process storage unit 10
2 (S208), and the process proceeds to step S204.
On the other hand, in step S204, if the priority of the process having the execution identifier is lower than the priority of the process having the latest standby identifier, or if the two have the same priority, the process level management unit 106a stores the standby process storage. The latest standby identifier is extracted from the unit 103, and the execution processing storage unit 1 is used until then.
Instead of the execution identifier stored in 02, the latest standby identifier is stored in the execution process storage unit 102 (S209),
The processing state management unit 106b is instructed to execute the processing having the execution identifier. In this case, based on the contents of the register stored in the standby process storage unit 103, the most recently interrupted process will be continuously executed from the time of interruption.
The processing state management unit 106b is the processing level management unit 106a.
According to the instruction from (S20
5).

The operation of the real-time control device configured as described above will be described below. FIG. 3 is a flowchart showing the operation of the real-time control device of this embodiment. FIG. 4 is a timing chart showing the operation of the real-time control device according to the present embodiment. In the figure, a timer interrupt is used as an asynchronous event. Further, FIG. 5 is an example of the identifiers and priorities of the processes stored in the processing level storage unit 104. As described above, in the figure, the smaller the priority number, the higher the priority.

In the real-time control device of this embodiment, when the operation is started, the "process control process", which is the identifier of the process having the lowest priority, is stored in the execution process storage section 102, Nothing is stored in the standby process storage unit 103. Execution process storage unit 102 at the start of operation
FIG. 6 shows the contents of the standby process storage unit 103. It should be noted that also in the subsequent figures, description of information such as the contents of the registers stored in the standby process storage unit 103 will be omitted.

First, when the control of the device is started, the processing level management unit 106a executes the processing having the identifier stored in the execution processing storage unit 102.
Instruct 6b. Upon receiving the instruction from the processing level management unit 106a, the processing state management unit 106b starts executing the processing (S301). Here, since the first execution identifier is the “process control process” as described above, the process state management unit 10
6b takes out the module from the stroke control processing module storage unit 101a and starts the execution of the stroke control processing.
After that, the stroke control process is performed until the asynchronous event occurs, and when the asynchronous event occurs, the process proceeds to step S304. In the timing chart of FIG. 4, the nth timer interrupt corresponds to the asynchronous event at this step.

When the stroke control process ends without the occurrence of the asynchronous event, the device control ends (S302: Yes). In step S304, FIG.
The processing of the control unit 106 described in the flowchart of FIG. Now, returning to FIG. 2, a specific operation will be described. The process switching request unit 105, which has received the n-th timer interrupt, outputs a process switching request to the control unit 106. The processing level management unit 106a receives the processing switching request (S201), extracts the execution identifier, and stores it in the standby processing storage unit 103 (S202). further,
The processing level management unit 106a refers to the processing level storage unit 104 and stores the identifier of the process having the highest priority in the execution process storage unit 102 (S203). Since the identifier of the process with the highest priority is the identifier of the priority circuit control process as shown in FIG. 5, the identifier of the priority circuit control process is stored in the execution process storage unit 102. Therefore, the contents of the execution process storage unit 102 and the standby process storage unit 103 at this time are as shown in FIG.

The processing level management unit 106a compares the priority of the processing having the execution identifier with the priority of the processing having the latest standby identifier (S204). That is, the priority of the priority circuit control process having the execution identifier and the priority of the process control process having the latest standby identifier are compared. In this case, since the priority circuit control processing having the execution identifier has a higher priority, the processing level management unit 106a causes the processing state management unit 10 to operate.
6b is instructed to execute the priority circuit control process. The processing state management unit 106b receives the instruction from the processing level management unit 106a and receives the priority circuit control processing module storage unit 1
The module is taken out from 01b and the execution of the priority circuit control process is started (S205).

As described above, the series of processes having the highest priority is designed so as to be completed within the generation cycle of the asynchronous event. Therefore, the priority circuit control process ends before the (n + 1) th timer interrupt occurs. When the processing state management unit 106b detects the end of the priority circuit control process (S206: Yes), it notifies the processing level management unit 106a of the end of the priority circuit control process. Upon receiving the notification from the processing state management unit 106b, the processing level management unit 106a refers to the processing level storage unit 104 to check whether or not there is a process having a lower priority than the priority circuit control process (S207). .

As shown in FIG. 5, there are a normal circuit control process and a stroke control process as processes having lower priority than the priority circuit control process. Therefore, the processing level management unit 1
Reference numeral 06a denotes the identifier of the process having the next highest priority after the completed process, that is, the identifier of the normal circuit control process.
No. 02 (S208). After that, the processing level management unit 106a compares the priority of the processing having the execution identifier with the priority of the processing having the latest standby identifier (S2).
04). FIG. 8 is a diagram showing the contents of the execution process storage unit 102 and the standby process storage unit 103 at this time. As shown in the figure, since the normal circuit control process, which is a process having an execution identifier, has a higher priority, the process level management unit 10
6a instructs the processing state management unit 106b to execute the normal circuit control processing according to the execution identifier. Processing state management unit 1
In response to the instruction from the processing level management unit 106a, the module 06b takes out the module from the normal circuit control processing module storage unit 101c and starts execution of the normal circuit control processing (S205).

As shown in the timing chart of FIG. 4, the (n + 1) th timer interrupt occurs during execution of the normal circuit control process. In response to the timer interrupt,
The process switching request unit 105 outputs a process switching request. The processing level management unit 106a receives the processing switching request output from the processing switching requesting unit 105 (S20).
1), the execution identifier is extracted and stored in the standby process storage unit 103 (S202). Further, the processing level management unit 106
The a refers to the processing level storage unit 104 and stores the identifier of the process having the highest priority among the classified processes in the execution process storage unit 102 (S203). That is, the processing level management unit 106a stores the identifier of the priority circuit control process in the execution process storage unit 102.

FIG. 9 is a diagram showing the contents of the execution process storage unit 102 and the standby process storage unit 103 at this time. In the figure, a plurality of identifiers are stored in the standby process storage unit 103, but the lowest identifier is the latest standby identifier. As shown in the figure, since the priority of the priority circuit control process which is the process having the execution identifier is higher than the priority of the normal circuit control process which is the process having the latest standby identifier (S204: Yes), the execution identifier Accordingly, the processing state management unit 106b starts execution of the priority circuit control processing (S205).

As described above, the priority circuit control process is n + 2.
It is designed to finish before the occurrence of the second timer interrupt. The processing state management unit 106b detects the end of the priority circuit control processing (S206) and notifies the processing level management unit 106a of the end of the processing. The processing level management unit 106a refers to the processing level storage unit 104 to check whether or not there is a process having a lower priority than the priority circuit control process (S207). As a result, the identifier of the normal circuit control process, which is the process having the second highest priority after the priority circuit control process, is stored in the execution process storage unit 102 (S208).

FIG. 10 shows the execution process storage unit 102 at this time.
3 is a diagram showing the contents of a standby process storage unit 103. FIG. As shown in the figure, at this time, the priority of the process having the execution identifier is equal to the priority of the process having the latest waiting identifier. Therefore, the processing level management unit 106 a extracts the latest standby identifier and replaces the execution identifier stored in the execution process storage unit 102 up to that point with the execution process storage unit 10.
2 (S209). That is, the standby processing storage unit 10
The latest standby identifier “normal circuit control process” is taken out from No. 3 and stored in the execution process storage unit 102.

FIG. 11 shows the execution process storage unit 102 at this time.
3 is a diagram showing the contents of a standby process storage unit 103. FIG. Here, the normal circuit control processing stored in the execution processing storage unit 102 is processing interrupted at the time of the (n + 1) th timer interrupt in FIG. 4, and the address of the position at the time of execution suspension of the program, the contents of the register, etc. Since the information of is saved, it will be continuously executed again from the point of interruption.

As shown in the timing chart of FIG. 4, in the real-time control device of this embodiment,
This normal circuit control process ends before the (n + 2) th timer interrupt occurs. The processing state management unit 106b detects the end of processing (S206), and the processing level management unit 106a.
Notify the end of processing. The processing level management unit 106a, which has received the notification of the processing end, refers to the processing level storage unit 104 and checks whether or not there is a processing having a lower priority than the normal circuit control processing (S207). As shown in FIG. 5, since the process control process exists as a process having a lower priority than the normal circuit control process, the process level management unit 106a.
Stores the identifier “stroke control process” in the execution process storage unit 102 (S208).

FIG. 12 shows the execution process storage unit 102 at this time.
3 is a diagram showing the contents of a standby process storage unit 103. FIG. Also in this case, the priority of the process having the execution identifier is equal to the priority of the process having the latest waiting identifier (S20).
4), the processing level management unit 106a extracts the latest standby identifier and stores it in the execution process storage unit 102 (S20).
9). Therefore, the execution identifier becomes “stroke control processing”, and the execution processing storage unit 102 and the standby processing storage unit 1 at this time
The contents of 03 are as shown in FIG. Therefore, the processing state management unit 106b executes the stroke control process by the same operation as the above-described operation according to the execution identifier. Since this process is a process interrupted at the n-th timer interrupt in FIG. 4, it is continuously executed from the interrupted place.

Thereafter, as shown in FIG. 4, even when the (n + 2) th timer interrupt occurs, the priority circuit control process is executed by the same process as the process described above. If the stroke control process ends before the timer interrupt occurs (S206), there is no process having a lower priority than the stroke control process (S207: No), and the process of the control unit 106 ends. Returning to FIG. 3, the control of the device by the microcomputer system ends.

As described above, in the real-time control device of this embodiment, when an asynchronous event occurs, the priority of the process being executed is compared with the priority of the process having the highest priority, and the interrupt process is executed. By using the control so that the processing is always executed from the highest priority processing, it is possible to eliminate the work such as the complicated execution time calculation which is required at the time of designing the program and at the time of development.

Further, when performing an interrupt process accompanying the occurrence of an asynchronous event, the identifier representing the process being executed is saved,
When a high-priority process is completed, by comparing the priority of the process with the next highest priority after the completed process with the priority of the saved process, one type of interrupt factor
Since it is possible to control the processing classified into multiple priorities, while keeping the manufacturing cost of the microcomputer low,
It is possible to obtain the same result as the multi-step interrupt. (Second Embodiment) A second embodiment of the present invention will be described below.

FIG. 13 shows a partial configuration of a microwave oven as an application example of the real-time control device of the present invention. The real-time control device in this microwave oven includes a control processing module storage unit 1301, an execution processing storage unit 1302, a standby processing storage unit 1303, a processing level storage unit 1304, a process switching request unit 1305, and a control unit 13.
06.

The control processing module storage unit 1301 comprises a stroke control processing module storage unit 1301a, a priority circuit control processing module storage unit 1301b, and a normal circuit control processing module storage unit 1301c. The process control processing module storage unit 1301a stores a module for performing the process control processing. What is stroke control processing?
As described in the first embodiment, this is a process that does not have a time interval for activating the process or a process time limit and can be made to proceed in accordance with a predetermined execution procedure.

In the present embodiment, the modules stored in the stroke control processing module storage section 1301a are classified into a main processing module, a cooking stroke processing module group, a set stroke processing module group, and a management processing module group. It The main processing module calls and executes a necessary module from the modules included in the cooking process processing module group, the setting process processing module group, and the management processing module group.

Specific processing contents performed by the cooking process module group include power cooking, grill cooking, combination cooking, sensor cooking such as automatic weight cooking and automatic weight defrosting, and timer cooking. As the specific processing contents performed by the setting process module group,
Examples include setting of various cooking courses, various settings using a moireless key or the like for adjusting cooking contents to the user's preference, setting of a clock, and setting of a child lock that disables key operation.

Specific processing contents performed by the management processing module group include a test mode and a demo mode. The priority circuit control processing module storage unit 1301b stores a port input processing module, a port output processing module, and a counter processing module. Specifically, the contents of processing performed by the port input processing module include detection of keys for setting various cooking courses, pressing of keys such as start key, stop key, and clock setting key, dial rotation, slider, etc. , Detection of various interfaces used for setting, acquisition of values from various sensors such as a temperature sensor, a weight sensor, and an optical sensor.

Specifically, the contents of processing performed by the port output processing module include display on a liquid crystal or LED, activation of a motor, activation of a heater, and the like. The counter processing module performs increment processing of the counter, which is a basic unit when the timer measures time. The normal circuit control processing module storage unit 1301c stores a timer processing module, a refresh processing module, a port input corresponding processing module, and a port output corresponding processing module.

The timer processing module increments the timer prepared by the user based on the value of the counter incremented by the counter processing module. For example, when the counter has a 1-millisecond interval, when counting the counter in units of 1 second, the timer is incremented once when the counter is incremented 1000 times.

The refresh processing module periodically re-outputs the data output to the port in LED display, motor output, etc. to re-display the LED and restart the motor. An example of the process performed by the port input handling process module is a process of immediately activating the cooling fan when the temperature sensor detects that the temperature inside the refrigerator is high.

The process performed by the port output support processing module is, for example, a process of creating a display character in order to make a character appear to be scrolling in a limited display area when performing a character string scrolling process. Take as an example. Execution process storage unit 1302, standby process storage unit 1
303, processing level storage unit 1304, processing switching request unit 1305, control unit 1306 (processing level management unit 130
6a and the processing state management unit 1306b) are the same as those described in the first embodiment, and detailed description thereof is omitted here.

The operation of the real-time control device in the microwave oven configured as described above will be described below. FIG. 14 is a timing chart showing the operation of the real-time control device for a microwave according to the present embodiment. In this embodiment, a timer interrupt is used as an asynchronous event. Since the processing contents of the control unit and the like are almost the same as those of the first embodiment, the description will be given below with reference to FIGS. 2, 3 and 5 to 14.

The priority order of the process control process, the priority circuit control process, and the normal circuit control process is the same as that shown in FIG. Also in this case, the smaller the number, the higher the priority. First, FIG.
In step S301, control of the microwave oven according to the present embodiment is started. The execution process storage unit 130 in this state
2 and the contents of the standby process storage unit 1303 are shown in FIG.
Therefore, the processing level management unit 1306a executes the process control processing according to the execution identifier.
b, and based on the instruction, the processing state management unit 13
06b starts executing the stroke control process.

It is assumed that the n-th timer interrupt process occurs during the grill cooking process, which is a part of the stroke control process, after the stroke control process is started. As a result, the processing of the control unit 1306 when an asynchronous event occurs is started (S304). Turning to FIG. 2, first, the process switching request unit 1305 detects the occurrence of a timer interrupt and outputs a process switching request to the control unit 1306. The processing level management unit 1306a receives the processing switching request from the processing switching requesting unit 1305 (S20).
1), the execution identifier “stroke control process” is stored in the execution process storage unit 1
It is taken out of the storage unit 302 and stored in the standby processing storage unit 1303 (S202).

Further, the processing level management unit 1306a is
By referring to the processing level storage unit 1304, the identifier of the process having the highest priority is stored in the execution process storage unit 1302 (S
203). That is, the identifier “priority circuit control process” is stored in the execution process storage unit 1302. The contents of the execution process storage unit 1302 and the standby process storage unit 1303 at this time are as shown in FIG. Therefore, in the comparison between the priority of the process having the execution identifier and the priority of the process having the latest standby identifier (S204), the priority of the process having the execution identifier is higher than that of the process having the latest standby identifier. Since it is higher, the processing level management unit 1306a instructs the processing state management unit 1306b to execute the priority circuit control process which is a process having the execution identifier, and the processing state management unit 1306b starts the execution of the priority circuit control process according to the instruction. Do (S
205).

Specifically, the processing state management unit 1306b
Takes out the module stored in the priority circuit control processing module storage unit 1301b, performs the port input processing,
Port output processing and counter processing are sequentially executed.
The priority circuit control process is designed to end before the next process switching request is issued. Therefore, the processing state management unit 1306b detects the end of the priority circuit control processing,
After that, the same processing as the operation described in the first embodiment is performed. That is, the processing level management unit 1306a, which has received the notification of the processing end from the processing state management unit 1306b, executes the “normal circuit control processing” which is the identifier of the processing having the second highest priority after the priority circuit control processing, It is stored in 1302 (S208).

The contents of the execution process storage unit 1302 and the standby process storage unit 1303 at this time are as shown in FIG. Therefore, since the priority of the normal circuit control processing which is the processing having the execution identifier is higher than the priority of the stroke control processing which is the processing having the latest standby identifier, the priority of the normal circuit control processing which is the processing having the execution identifier is Execution is started (S2
05). Specifically, the processing state management unit 1306b takes out the modules stored in the normal circuit control processing module storage unit 1301c and sequentially executes the timer process, the refresh process, the port input handling process, and the port output handling process.

Here, as shown in the timing chart of FIG. 14, the (n + 1) th timer interrupt occurs during the port input handling process (S201).
The processing level management unit 1306a extracts the “normal circuit control processing” that is the execution identifier, and stores it in the standby processing storage unit 1303.
(S202), the "priority circuit control process" which is the identifier of the process having the highest priority is stored in the execution process storage unit 13
No. 02 (S203).

The contents of the execution process storage unit 1302 and the standby process storage unit 1303 at this time are as shown in FIG. Therefore, when the priority of the process having the execution identifier and the priority of the process having the latest waiting identifier are compared (S204),
Since the process having the execution identifier has a higher priority, the execution of the priority circuit control process, which is the process having the execution identifier, is started (S205). That is, the processing state management unit 1306
The module b stores the modules stored in the priority circuit control processing module storage unit 1301b, and sequentially executes the port input processing, the port output processing, and the counter processing.

The priority circuit control process is designed to be completed before the next process switching request is issued. Processing state management unit 1306b that has detected the end of the priority circuit control processing
Notifies the processing level management unit 1306a of the end of the priority circuit control processing (S206). Processing level management unit 130
6a receives the notification of the end of the process, and stores the identifier of the normal circuit control process, which is the process having the second highest priority after the priority circuit control process, in the execution process storage unit 1302 (S208).

The contents of the execution process storage unit 1302 and the standby process storage unit 1303 at this time are as shown in FIG.
As a result of the comparison between the priority of the process having the execution identifier and the priority of the process having the latest waiting identifier (S204), the priorities of both processes become equal. Therefore, the processing level management unit 1
The 306a retrieves the latest standby identifier from the standby process storage unit 1303 and stores it in the execution process storage unit 1302 (S
209).

The contents of the execution process storage unit 1302 and the standby process storage unit 1303 at this time are as shown in FIG.
The execution of the normal circuit control process is started according to the execution identifier. Since this process is interrupted at the (n + 1) th timer interrupt, it is continuously executed from the interrupt point (S205). Specifically, the port input corresponding process is continuously executed, and further the port output corresponding process is executed.

As shown in FIG. 14, in the present embodiment, the normal circuit control process ends before the (n + 2) th timer interrupt occurs. The processing state management unit 1306b detects the end of the normal circuit control processing, and the processing level management unit 1306b
The end of processing is notified to 306a (S206).
The processing level management unit 1306a receives the processing end notification, refers to the processing level storage unit 1304, and checks whether or not there is processing having a lower priority than the normal circuit control processing (S207). As shown in FIG. 5, since the process control process exists as a process having a lower priority than the normal circuit control process, the process level management unit 1306a stores the process control process identifier in the execution process storage unit 1302 ( S20
8).

The contents of the execution process storage unit 1302 and the standby process storage unit 1303 at this time are as shown in FIG. 12, and the priority of the process having the execution identifier is equal to the priority of the process having the latest standby identifier. . Therefore, the processing level management unit 1306a takes out the latest process identifier “stroke control process” and stores the execution process storage unit 1302 until then.
It is stored in the execution process storage unit 1302 instead of the execution identifier stored in (S209).
6b is instructed to execute the stroke control process. The processing state management unit 1306b receives the instruction from the processing level management unit 1306a and starts execution of the stroke control process (S205).

Since this processing is interrupted by the n-th timer interrupt, it is continuously executed from the interruption point. Specifically, it is continuously executed from the middle of the grill cooking process. As described above, the real-time control method and device of the present invention can be applied to the control of a microwave oven.

In the present embodiment, the execution order of the processing included in the priority circuit control processing is the order of port input processing, port output, and counter processing, and the execution order of the processing included in the normal circuit control processing is the same. The order of the timer processing, the refresh processing, the port input corresponding processing, and the port output corresponding processing is described above, but the execution order is not limited to this, and it is possible to execute in an appropriate order according to the embodiment. is there.

It is also possible to divide or integrate the modules to perform the same processing, and the names and configurations of the modules stored in the control processing module storage section are also limited to the example of the present embodiment. It is not something that will be done. (Third Embodiment) Next, a third embodiment of the present invention will be described.

FIG. 15 is a block diagram showing a part of the construction of the dishwasher provided with the real-time control processing of the present invention. The real-time control device in this dishwasher is
Control processing module storage unit 1501, execution processing storage unit 1
502, standby processing storage unit 1503, processing level storage unit 1
504, processing switching request unit 1505, control unit 1506
Is provided.

The control processing module storage unit 1501 comprises a stroke control processing module storage unit 1501a and a circuit control processing module storage unit 1501b. The process control processing module storage unit 1501a stores a module for performing the process control processing. The process control process is a process that does not have a time interval for activating the process or a process time and may be performed according to a predetermined execution procedure.

In the present embodiment, the modules stored in the stroke control processing module storage unit 1501a are
It is classified into a main processing module, a cleaning process processing module group, a setting process processing module group, and a management module group. The main processing module calls and executes a necessary module from the modules included in the cleaning process processing module group, the setting process processing module group, and the management processing module group.

The specific processing contents performed by the cleaning process module group include a normal cleaning process for cleaning and drying dishes normally, an express cleaning process for cleaning and drying dishes immediately, and a careful cleaning process. Examples include a thorough cleaning process such as drying. Specific processing contents performed by the setting process module group include setting of various cleaning courses, various settings using a time setting key for adjusting the cleaning contents to the user's preference, and setting of a clock.

Specific processing contents of the management processing performed by the management processing module group include a test mode and a demo mode. Circuit control processing module storage unit 150
A port input / output processing module, a counter processing module, a timer processing module, a refresh processing module, and a port input / output compatible module are stored in 1b.

The processing performed by the port input / output processing module includes detection of key presses such as keys for setting various cleaning courses, start keys, stop keys, and clock setting keys, and settings such as dial rotation and slider settings. Examples include detection of various interfaces used, acquisition of values from various sensors such as a temperature sensor, a weight sensor, and an optical sensor, display on a liquid crystal or LED, activation of a motor, activation of a heater, and the like.

The counter processing module performs the increment processing of the counter, which is the basic unit when the timer counts. The timer process is a process of incrementing a timer prepared by the user based on the incremented counter value. For example, when the counter has a 1-millisecond interval, when the timer of the unit of 1 second is timed, the counter is incremented once every 1000 times.

The refresh processing module periodically re-outputs the data output to the port in LED display, motor output, etc. to re-display the LED and restart the motor. The processing performed by the port input / output support processing module is to immediately stop the heater when the temperature sensor detects that the temperature of the heater has become abnormally high, or to express a number by combining 7-segment LEDs. Examples include a process of creating an LED lighting pattern.

The execution process storage unit 1502, the standby process storage unit 1503, the process level storage unit 1504, the process switching request unit 1505, the control unit 1506 (the process level management unit 15).
(Including the processing state management unit 1506b and the processing state management unit 1506b) is the same as that described in the first embodiment, and thus detailed description thereof is omitted here. The operation of the dishwasher configured as above will be described below.

FIG. 16 is a timing chart showing the operation of the real-time control device provided in the dishwasher according to this embodiment. In this example, a timer interrupt is used as an asynchronous event. Since the processing content of the control unit 1506 is almost the same as that described in the first embodiment, it will be described below with reference to FIGS. 2, 3, and 15 to 20. The processing level storage unit 1504
The contents of the above are shown in FIG. In the figure, the smaller the number, the higher the priority.

First, control of the equipment is started in FIG. Since the contents of the execution process storage unit 1502 and the standby process storage unit 1503 at the start of control are as shown in FIG. 18, the process level management unit 1506a instructs the process state management unit 1506b to execute the process control process according to the execution identifier. To do. Upon receiving the instruction, the processing state management unit 1506b starts executing the stroke control process (S301).

Here, it is assumed that the n-th timer interrupt is generated during the normal cleaning control processing which is a part of the stroke control processing. As a result, the processing shifts to the processing of the control unit 1506 shown in FIG. 2 (S304). Upon receiving the timer interrupt, the process switching request unit 1505 outputs a process switching request to the control unit 1506. The processing level management unit 1506a receives the processing switching request (S201), and extracts the execution identifier and stores it in the standby processing storage unit 1503 (S202). Further, the processing level management unit 1506a refers to the processing level storage unit 1504 and stores the identifier of the process having the highest priority in the execution process storage unit 1502 (S203).

As shown in FIG. 17, since the process with the highest priority in this embodiment is the circuit control process, the identifier “circuit control process” is assigned to the execution process storage unit 1502.
Stored in. The contents of the execution process storage unit 1502 and the standby process storage unit 1503 at this time are shown in FIG. The processing level management unit 1506a compares the priority of the process having the execution identifier with the priority of the process having the latest standby identifier (S204). In this case, since the circuit control process, which is a process having the execution identifier, has a higher priority,
The process proceeds to step S205, and the processing state management unit 1506b
Starts execution of the circuit control process which is a process having the execution identifier. Specifically, port input / output processing, counter processing, refresh processing, and port input / output corresponding processing are sequentially performed.

As described above, the real-time control device of the present invention is designed so that the process with the highest priority is completed within the asynchronous event generation cycle. Therefore, the circuit control process ends before the next timer interrupt occurs.
When the circuit control processing ends, the processing state management unit 1506b
Detects the end of the process and notifies the process level management unit 1506a of the end of the process. Processing level management unit 1506a
Refers to the processing level storage unit 1504 and checks whether or not there is a process having a lower priority than the circuit control process (S).
207).

As shown in FIG. 17, since the process control process exists as a process having a lower priority than the circuit control process, the identifier of the process control process as the process having the second highest priority after the circuit control process is completed. It is stored in the execution process storage unit 1502 instead of the circuit control process identifier (S20).
8). The processing level management unit 1506a compares the priority of the process having the execution identifier with the priority of the process having the latest standby identifier (S204). FIG. 20 shows the execution process storage unit 1502 and the standby process storage unit 150 at this time.
3 is shown. As shown in the figure, since the priority of the process having the execution identifier is equal to the priority of the process having the latest standby identifier, the processing level management unit 1506a extracts the latest standby identifier and stores it in the execution process storage unit 1502. It is stored (S209), and the processing state management unit 1506b is instructed to execute the stroke control process that is a process having the execution identifier. Upon receiving the instruction, the processing state management unit 1506b starts executing the stroke control processing (S205). Since this process was interrupted at the time of the nth timer interrupt, it is continuously executed from the interrupted point. Specifically, the normal cleaning process is continuously executed.

After that, when a timer interrupt occurs again during execution of the normal cleaning process, the circuit control process is performed again by the same operation as when the nth timer interrupt occurs. That is, when the (n + 1) th timer interrupt occurs before the end of the normal cleaning process, the circuit control process is performed as shown in the timing chart of FIG. 16, and after the circuit control process is completed, the normal cleaning process process is performed. Is continuously executed from the point of interruption.

Furthermore, before the end of the normal cleaning process, n +
The same applies when the second timer interrupt occurs, so a detailed description is omitted here. If the stroke control process is completed before the timer interrupt is generated, there is no process with a lower priority than the stroke control process as shown in FIG. 17, and therefore the process returns to FIG. 3 (S207: No), and the microcomputer system returns. The control of the device by is ended.

In the present embodiment, the order of execution of the processes included in the circuit control process is the port input / output process,
Although the order of the counter process, the refresh process, and the port input / output corresponding process has been described, the execution order is not limited to this, and the processes can be executed in an appropriate order according to the embodiment. It is also possible to divide or integrate the modules to perform the same processing, and the names and configurations of the modules stored in the control processing module storage unit are also limited to the example of this embodiment. is not.

Further, in the present embodiment, an example of a microwave oven and a dishwasher is shown as an application example of the real-time control method and device of the present invention, but the types of applicable equipment are not limited to these. However, for example, it is applicable to a device controlled by a microcomputer system, such as a washing machine, a television, a rice cooker, a portable terminal, etc., which requires real-time control.

[0103]

According to the first aspect of the present invention, an interrupt associated with the occurrence of one type of asynchronous event is used to activate a process with a higher priority, and interrupt the process after the process with a higher priority is completed. Since the low-priority processing is re-executed from the interruption point, it is not necessary to divide the low-priority processing to finish it within a predetermined cycle, and there is an effect that the program design and development are facilitated.

When a series of processes having the same priority is completed, the process having the next highest priority after the completed process is compared with the priority of the interrupted process. It is possible to control processing having a plurality of priorities by using different types of interrupt factors, and it is possible to prevent an increase in manufacturing cost of a microcomputer system due to the use of a circuit capable of multistage interrupt.

In the invention of claim 2, in addition to the effect of the invention of claim 1, when there is no process having a priority lower than that of the completed process, control such as ending the control of the device can be performed. There is an effect that it becomes possible. According to the invention of claim 3, in addition to the effect according to the invention of claim 1 or 2, there is an effect that a process that requires strict real-time property can be surely executed.

According to the invention of claim 4, the same effect as that of the invention of claim 3 can be obtained. According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 4, there is an effect that an interrupt can be generated with a simple configuration. In the invention of claim 6, the same effect as that of the invention of claim 5 can be obtained.

According to the invention of claim 7, in addition to the effects of the inventions of claims 1 to 6, there is an effect that the identifier of the process being executed can be easily determined. According to the invention of claim 8, in addition to the effects of the inventions of claims 1 to 7, there is an effect that it is possible to reliably control the processing to which a plurality of priorities are assigned. In the invention of claim 9,
The effects of the invention described in claims 1 to 8 can be obtained in a situation where resources are limited, such as a microcomputer system provided for home electric appliances.

According to the invention of claim 10, the same effect as that of the invention of claim 2 can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a real-time control device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing processing contents of a control unit in the real-time control device according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing an operation of the real-time control device according to the first embodiment of the present invention.

FIG. 4 is a timing chart showing the operation of the real-time control device according to the first embodiment of the present invention.

FIG. 5 is a diagram showing an example of contents of a processing level storage unit in the real-time control device according to the first embodiment of the present invention.

FIG. 6 is a diagram showing an example of contents of an execution process storage unit and a standby process storage unit during operation of the real-time control device according to the first embodiment of the present invention.

FIG. 7 is a diagram showing an example of contents of an execution process storage unit and a standby process storage unit during operation of the real-time control device according to the first embodiment of the present invention.

FIG. 8 is a diagram showing an example of contents of an execution process storage unit and a standby process storage unit during operation of the real-time control device according to the first embodiment of the present invention.

FIG. 9 is a diagram showing an example of contents of an execution process storage unit and a standby process storage unit during operation of the real-time control device according to the first embodiment of the present invention.

FIG. 10 is a diagram showing an example of contents of an execution process storage unit and a standby process storage unit during operation of the real-time control device according to the first embodiment of the present invention.

FIG. 11 is a diagram showing an example of contents of an execution process storage unit and a standby process storage unit during operation of the real-time control device according to the first embodiment of the present invention.

FIG. 12 is a diagram showing an example of contents of an execution process storage unit and a standby process storage unit during operation of the real-time control device according to the first embodiment of the present invention.

FIG. 13 is a block diagram showing a configuration of a real-time control device according to a second embodiment of the present invention.

FIG. 14 is a timing chart showing the operation of the real-time control device according to the second embodiment of the present invention.

FIG. 15 is a block diagram showing a configuration of a real-time control device according to a third embodiment of the present invention.

FIG. 16 is a timing chart showing the operation of the real-time control device according to the third embodiment of the present invention.

FIG. 17 is a diagram showing an example of contents of a processing level storage unit in the real-time control device according to the third embodiment of the present invention.

FIG. 18 is a diagram showing an example of contents of an execution process storage unit and a standby process storage unit during operation of the real-time control device according to the third embodiment of the present invention.

FIG. 19 is a diagram showing an example of contents of an execution process storage unit and a standby process storage unit during operation of the real-time control device according to the third embodiment of the present invention.

FIG. 20 is a diagram showing an example of contents of an execution process storage unit and a standby process storage unit during operation of the real-time control device according to the third embodiment of the present invention.

FIG. 21 is a flowchart showing the processing contents of a conventional “loop method” which is a real-time control method.

FIG. 22 is a flowchart showing detailed processing contents of sequence control processing in the “loop method”.

[Explanation of symbols]

 101 Control Processing Module Storage Unit 101a Process Control Processing Module Storage Unit 101b Priority Circuit Control Processing Module Storage Unit 101c Normal Circuit Control Processing Module Storage Unit 102 Execution Process Storage Unit 103 Standby Processing Storage Unit 104 Processing Level Storage Unit 105 Process Switching Request Unit 106 Control unit 106a Processing level management unit 106b Processing state management unit 1301 Control processing module storage unit 1301a Process control processing module storage unit 1301b Priority circuit control processing module storage unit 1301c Normal circuit control processing module storage unit 1302 Execution processing storage unit 1303 Standby processing storage Unit 1304 Processing level storage unit 1305 Processing switching request unit 1306 Control unit 1306a Processing level management unit 1306b Processing state management unit 1501 Control processing module storage unit 1 501a Process control processing module storage section 1501b Circuit control processing module storage section 1502 Execution processing storage section 1503 Standby processing storage section 1504 Processing level storage section 1505 Processing switching request section 1506 Control section 1506a Processing level management section 1506b Processing state management section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norio Sanada 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Goichi Abu 1006, Kadoma, Kadoma City, Osaka Prefecture 72) Inventor Hirohiko Tanaka 1006, Kadoma, Kadoma-shi, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Kenji Ito Osaka, Kadoma City 1006 Kadoma, Matsushita Electric Industrial Co., Ltd. 1006 Kadoma, Kadoma-shi, Matsushita Electric Industrial Co., Ltd. (72) Inventor, Emiko Ishizaki 1006 Kadoma, Kadoma-shi, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (10)

[Claims] 1. A real-time control device in a microcomputer system for controlling a device by using an interrupt caused by one kind of interrupt factor generated at a predetermined cycle, and a program for ending the program within the predetermined cycle. Processing priority storing means for storing processing identifiers and priorities for the processed highest priority processing and processings having other priorities, and execution processing storage for storing the identifier of the processing being executed. Means, standby processing storage means for sequentially storing the identifier of the processing whose execution has been interrupted and information indicating the status of the processing at the time of interruption, and processing switching request means for outputting a processing switching request in response to the occurrence of the interrupt. And receiving the process switching request, interrupting the process being executed, starting execution of the process assigned the highest priority, and storing the execution process storage A first control means for updating the contents of the stage and the standby processing storage means; and when the end of the processing is detected, the priority of the processing having the second highest priority after the completed processing and the standby processing storage means Comparing means for comparing the priority of the process with the last stored identifier, and in the comparison of the comparing means, when the former is higher,
In the comparison between the second control means for starting the execution of the former processing and updating the contents of the execution processing storage means, and the comparison means, when the former is lower or the priority of both is equal. , The latter process is restarted from the point of interruption based on the information indicating the status of the process at the time of interruption stored in the standby process storage unit, and the contents of the execution process storage unit and the standby process storage unit are updated. A real-time control device comprising: a third control means. 2. The real-time control device further refers to the contents of the process priority storage means when detecting the end of the process, and determines whether or not there is a process having a lower priority than the completed process. The comparing unit stores the priority of the process having the second highest priority next to the process that has ended and the last storing process in the standby process storing unit when the comparing unit determines that the process exists. The real-time control device according to claim 1, wherein the priority of the process having the identified identifier is compared. 3. The process for controlling the device is classified into two levels of priority according to the content of the control, and the process classified into the higher priority includes a process requiring strict real-time processing, The real-time control device according to claim 1 or 2, wherein the processing classified into the one with lower priority includes other processing. 4. The process for controlling the device is classified into three priority levels according to the control content, and the process classified as the highest priority is the input / output process with the port and the timer timing. Including the increment process of the counter which is the basic unit in the case of, the process classified as the next highest priority is the timer timing process, the port output refresh process and the data input from the port. 3. The real-time control device according to claim 1, further comprising a process that needs to be performed and a process that creates data to be output to a port. 5. The real-time control device according to claim 1, wherein the processing switching requesting means outputs a processing switching request in response to a timer interrupt. 6. The real-time control device according to claim 1, further comprising an interrupt generation unit that generates an interrupt by detecting a cycle of an AC power supply voltage. apparatus. 7. The method according to claim 1, wherein the first control unit overwrites the content of the execution process storage unit with the identifier of the process having the highest priority. The real-time control device described. 8. The standby processing storage means has a stack structure, and the first control means stores in the standby processing storage means an identifier of the interrupted processing and information indicating a status of the processing at the time of interruption. The real-time control device according to any one of claims 1 to 7, further comprising: 9. The real-time control device according to claim 1, wherein the real-time control device is provided in a microcomputer system that controls a home electric appliance. 10. A real-time control method in a microcomputer system for controlling a device by utilizing an interrupt caused by one type of interrupt factor generated in a predetermined cycle, wherein a process switching request is received in response to the occurrence of the interrupt. And a first execution step of interrupting the process being executed and starting the execution of the process having the highest priority in response to the process switching request, and when the end of the process is detected. In the case where there is a process having a lower priority than the completed process, a comparison step of comparing the priority of the process having the next highest priority with the completed process and the priority of the process that was interrupted recently, A second execution step of starting execution of the former process when the former is higher in the comparing step, and the former is lower in the comparing step Or when both priority are equal, real-time control method characterized by having a third execution step resumes latter processes from the point of interruption.