JPH02120938A - Data processing method - Google Patents

Abstract

PURPOSE:To simplify operation and constitution by executing interruption processing and restart processing due to the generation of abnormality in each control program (I/O driver) for controlling each I/O apparatus. CONSTITUTION:A power outage processing program is included in each initializing program part of an I/O driver for each I/O apparatus in a terminal equipment 2 which is stored in an internal storage part of a host computer 1. When power outage is generated, only the register data of an executing task are stored in a work area 9 of the internal storage part 18, interruption processing for the I/O driver corresponding to each stored I/O apparatus is executed by using the power outage generation detecting output as an interruption signal and a power outage processing routine is started in each I/O driver. Since the power outage processing is dispersedly executed in each I/O driver, it is unnecessary to guarantee a long operation time after the generation of the power outage to a CPU in the computer 1 and the operation and constitution are simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a data processing method, and more specifically, to an efficient method for suspending ongoing data processing due to the occurrence of an abnormality and resuming data processing when the abnormality is resolved. The present invention relates to a data processing method that can be performed in a timely manner.

BACKGROUND ART Conventionally, B insertion measures have been proposed to improve data processing efficiency by computers. J) Measure m
-) is the multitasking method. That is, a plurality of logs are stored in a disk storage device or an internal memory, and each of these 10 logs is divided into groups called tasks, and for example, 4 logs are input/' During data exchange with the output device, the CF' (central processing unit) of the computer is inactive for a relatively long period of time. Each task of several programs is executed efficiently without changing the priority order, so that the processing apparently progresses in parallel.

In such a multi-tasking method, as described above, in the data technology, multiple tasks of 10 tasks can be performed.
classification and priority of tasks, and O8 for exchanging data with input/output devices.
(Operating System Steno 1) is adopted. In other words, each program and evening schedule is 1. They will each operate under the control of O8 like the two.

When a power outage occurs in such a computer system, the data processing that was being performed until then is interrupted, but 8 types of data are saved in order to resume data processing from the point of interruption after the power outage is resolved. There is a need to. That is, in such a computer system, for example, a liquid crystal display device or a so-called touch screen is used. - When a board is used, display data, touch keyboard foreman, etc. need to be saved. Furthermore, it is generally assumed that each task is transmitting data with a plurality of types of input/output devices, and in such a case, it is necessary to perform power outage processing for each input/output device as well.

For this reason, conventionally, the O8 is provided with a power outage 9j% filling routine (referred to as a processing routine at the time of a power outage and a processing routine after a power outage), and when the occurrence of a power outage is detected, the processing is performed by a task, i.e. The level of the aggregation program is switched to the level of O8, the power failure processing routine in O8 is read out, and various processes as described above are performed.

Problems that the invention aims to solve: Does a power outage occur in a conventional example like this? Unfortunately, the power outage processing routine in O8 takes a relatively long time to operate, including processing power outages for each input/output device, so power is not supplied to the central processing unit for a relatively long time after a power outage occurs. There is a need to. For this reason, it is necessary to provide an internal power supply with a relatively large capacity, and it is also necessary to provide an accompanying circuit, making the configuration complicated. There is also the problem that the power outage processing routine called during O8 becomes unnecessarily complicated.

An object of the present invention is to provide a data processing method that solves the above-mentioned technical problems, has a simplified configuration, and can perform efficient operations.

Means for Solving the Problems The present invention is a method for performing data processing using input/output devices in a multitasking manner, which
The feature is that the interruption process that interrupts data processing in progress and the restart process that resumes data processing from the interrupted point when an error is resolved are performed every 10 grams of control that controls each input/output device. This is a data processing method.

Operation Data processing according to the invention is performed using input/'output devices in a multitasking manner. The operation status of this input/output device is controlled by an individual control program. A restart process for restarting data processing from the point where it was interrupted at the time of cancellation is performed, and a control n program for performing such interruption process and restart process is executed by each control 10 of the input/output device.
Provide each for each gram. Therefore, the operating system that controls the aggregation program that executes such data processing is only limited to retaining data indicating the interruption position of the aggregation program.
There is no need to take an unnecessarily long time to process the power outage when a power outage occurs, and the burden on the operating system can be reduced.

Embodiment The present invention relates to a method of performing data processing using a multiprogramming method, in particular, an aggregation program is divided into portions called tasks, and the CPU of a computer processes each task from each aggregation program. This paper proposes a data processing method that improves processing efficiency by assigning priorities and processing these tasks sequentially, apparently processing multiple tasks in parallel.

Such a data processing method is suitably used in, for example, an F'O3 (point of sale) system. FIG. 1 shows a configuration example according to an embodiment of the present invention.

FIG. 1 is a block diagram showing an example of the configuration of the POS system, which includes a host computer 1 and a plurality of terminal devices connected to the host computer 1 for mutually transmitting data. ! The terminal device 2 includes a processing device 3 including, for example, a microgrocer, and inputs data to the host computer 1 via the processing JA device 3, and outputs the input data. The device shown on the LCD shown below is the LCD
(abbreviated as) -=1, etc., and ~! - Input Input 5 - Code reader 6 and MtC (Ia ink character) reader (IJ.

Below, MCR 〉7 etc. are connected. host·:
1. The computer 1 has a plurality of control devices (1) that control each of the above-mentioned input and output devices of the terminal device 2.
'J Ding, ■ '0 driver). 41,
The initial program portion of the '0 driver includes a power failure processing routine, which will be described later. An example of real noodles is
1. An abnormality such as a power outage occurs in the POS system like 2! ! This concerns the processing of the third meeting.

FIG. 2 is a flowchart explaining the basic operation of one embodiment of the present invention. In the following explanation, the first
．． The host computer 1 with the configuration shown in 4) is
I am faithful to the sound of the multi-tasking system. In step a1 of FIG. 2(1), a task IF is executed. In steps r and t2, it is determined whether a task switching interrupt such as completion of the task has occurred, and if no task switching interrupt has occurred, execution of the same task continues. If the output of step iL2 is 1', other tasks are executed in steps a and 3. In such a case where there are a plurality of tasks <7) in the execution order, the O8 that executes the F' OS system of this embodiment performs the execution order in the order of execution.

At step t4, it is determined whether or not the interruption caused by the power outage is LP. If not, the process described above is repeated at step ε12). When it is determined that a power outage interruption has occurred, Step A 5- is a power outage described later.
98-build routine> is executed, and when it is finished, step 5 turtle 1 is executed.
Return to

Here, processing is performed on the internal storage section 8! (If this is done above and the human cuff output device is not the target, it is sufficient to retain various registers such as stack pointer data at the time of interruption.

That is, the task determines whether it is necessary to call the power outage 95 routine described below, depending on the object to be accessed at the time of interruption.

FIG. 2 (2) shows the above-mentioned power outage 95 routine.

In step b1, register data related to the task being executed at the time of the power outage is saved to a storage unit S provided in the host computer 1 and constituted of, for example, RAM (access memory). Next, in step b2, a power-off command is executed, and in step L+3, IJ, 'l, L
A T command is issued and the function stops.

Thereafter, when the deafness caused by a power failure is restored, the hardware such as the host computer 1 is initialized in step b4, and a power failure recovery flag, which will be described later, is reset in the steno IJ5.

FIG. 3 shows the internal storage section 8 of the host computer 1.
2 is a diagram illustrating the storage contents of a work area 9 set within the work area 9. FIG. The work area 9 contains, for example, all the tasks deployed in the internal storage section S at the time of the power outage;
For example, there is a task area 10 that stores the identification data, an access pair ff1ffi area 11 that stores the pair that was being accessed at the time of a power outage for each task, and an access pair ff1ffi area 11 that stores the pair that was being accessed at the time of a power outage for each task.
The stop Z (where the flag is set to 7l[· when mfi is active) and the fly area 12 which stores the return flag are configured as 1'!7.

4 is a flowchart showing the task execution process shown in step a of FIG. 2 (1). As mentioned above, the process is to move the program from the evening when a power outage is detected to the O8 to the O8, and execute the power outage 98-minute routine to hear the sound from the O8. : Power outage 1 (The power outage processing routine of O8 was executed at 1 o'clock, and at that time, 1151 ri was executed, which resulted in the application cage reversal program being executed. In this embodiment, instead of this procedure, In the configuration shown in the first I21, for example, the power outage processing program is applied to each of the i and 10 drivers of each input/output device stored in the internal storage section 8 of the computer 1. Zuro.

Will this actually work when a power outage occurs? For the tasks in j,
Only the register data is stored in the work area 9 of the internal storage section 8, and the occurrence detection output is used as an interrupt signal to correspond to each input/output device stored in the internal storage section S. The interrupt processing is performed for each I10 driver, and a power outage processing routine is started in each I1 and /'0 driver.

As shown in Fig. 40, when each task is waiting for a hardware interrupt input, it is necessary to wait for a power outage (f) Jiri “IJ ni 7 no [
- It is determined whether or not the interrupt has been executed, and if the answer is negative, the process moves to step c2, and the interrupt wait status of the hardware is continued. If the judgment in step c1 is 11 constant, step c
Moving to step 3, each specific program in the task that was being executed when the stop Th occurred is restarted from the beginning. After this, the process returns to step 1.

Here, the specific program (area 1) is, for example, when a part of the task that accepts and accepts key inputs is being executed, the key input part is 10. At this time, for example, when a certain key is pressed. When the key is pressed, code data is generated at the position on the V-matrix in the V-input section 5 of the key, but before the code data is converted to the type of button used in the program. There is a case 6 in which a power outage occurs before the key input process is completed.In such a case, the process is started from the beginning of the key input process in order to request the above-mentioned press operation 2!- again. In the above example, the part that performs a series of key input processes is the specified 10 grano.

It becomes an area.

5i21 is a flowchart showing an outline of the above-mentioned I.sub.2, z.sub.O driver. Referring to Figure 5,
In step d1 of FIG. 5(1), for example, the 112th!
For example, when a process using the I10 driver regarding the key input section 5 is started in the host computer 1 shown in FIG. Various data such as values, I/'O drivers, and controls (addresses when the bell is in the main program (hereinafter, such data will be referred to as end data) are saved in the work area 9, for example. In step (12) , I/'O device processing to be described later is performed, and step d
3 relates to the I70 driver being used and the input section 5, in which each insertion force data is stored, for example, in the internal storage section S.

FIG. 5(2) is a flowchart showing the I,'0 device CS process. Step d l of No. 51J(2)
At step 1, it is determined whether the power failure recovery flag F shown in FIG. 3 is set to, for example, logic "1". If this determination is negative, the process moves to step dl2, where, for example, input cuff output control for the two V-input sections is performed. Thereafter, in step (113), system flag processing as described later is performed.

If the judgment in the step (111) is positive, the tail filling returns to the step dl of the fifth [] (1).In other words, in the task processing explained with reference to the fourth step 9, The process of detecting in step c1 and restarting in step (3) if it is set corresponds to the flowchart in FIG. by.

In other words, if a power outage occurs during the processing of the 17'0 driver, the program will continue to be executed from the interrupted position after the 17'0 recovery, for example. Many J-% vehicles are equipped with a power supply circuit, and since such a circuit is initialized in the event of a power outage, it is difficult to continue processing from the above-mentioned interrupted position.

Therefore, in this embodiment, when the I10 device is started, the state of the power failure recovery flag is detected, and if it is detected that the restart is after power failure recovery, the program containing the interrupted part of the concerned ■/'0 driver is Start processing from the beginning of the part. That is, the I10 driver is re-deployed to, for example, the internal storage section 8 of the host computer 1 and the processing is executed. Since there are cases where such re-execution is performed, the entry data saved in step d1 in FIG. 5(1) will be saved until the execution of the I10 driver is finally completed. .

5th [2! (3) is a flowchart 1 to 1 showing details of the system flag processing described above. As for the system flag used here, m-) is assigned to each I10 driver i5. This system flag is used when the program is in the interrupt state, so if a power outage occurs, the program will be restarted unless the system flag is set. It will not start.

In the 51k(3) step d21, the busy flag SB for the I, '0 driver f is turned off. In step (122), the device wait flag DW is called.After this, when an interrupt that detects a power outage occurs, interrupt convex embedding is performed as described later. It is determined whether or not the flag F for preventing a power outage 121 as described above is turned on. If it is not turned on, the operation is stopped. Step (f' of 123)
If the JI error is affirmative, the process returns to step d1 in FIG. 5(1), and the 10-gram portion of the 10 driver concerned is re-executed from the beginning.

The 51st <-1> is a flowchart showing detailed MA of interrupt processing during a series of power outages. 5th [4(
・Step 1) (131) corresponds to the relevant I/O driver. At the same time, it is necessary to bury devices such as walls and other devices.

In the next step (132), cystine and flag flags, which will be described later, are set at the time of such an interrupt, and the embedding is completed.

FIG. 5 (5) is an L7-chart which explains cystine and flag processing at the time of an interrupt in the process described with reference to FIG. 5 (-1>). Step 7 feed
At 41, the device flag D S is called,
Subsequent steps (142 include the aforementioned cystine, l+
t+SY Turn off the Y flag SB.

This, 71 f4, power outage deafness IX (, i, Fig. 5 (・l) J) and from the interrupt filling shown in [21 <5>], the cystine shown in Fig. 5 (3), Flag Tow I!
I! When the i control is completed, the small filling is performed from step 511 (3) (123).

Here, the processes shown in 5121(4) and 5121(5) of the same figure are referred to as warm boot operations 7) and start, and are performed when the monitor programmer 1. This is a control device that restarts the process from the point where it was interrupted when the process is switched to execution of the application program after the switching of 1\ is delayed.

FIG. 6 is a flowchart illustrating the operation when the key input section 5 shown in FIG. 1 is a so-called touch keyboard. For example, Figure 5 shows a typical processing procedure including power outage processing for various input/output devices such as LCD 4. However, with -J, the flowchart in Figure ()
For example, in step (11) of FIG.
This is a special example of the process of "Save endori data" on the touch keyboard.

In step e1 of FIG. 6, key formant setting information for such a touch keyboard (display position I of various key functions assigned to the key input section, and each six-U (
When the process is interrupted (such as Noh's /22 kyoho), when the process is interrupted, the J
It is stored and maintained in the work area 9 shown in FIG. In Step 1 (2), setting processing is performed based on this setting information. In Step (3), such setting information is stored in the work area for the warm boot described above.

In this way, the storage process of step dl in FIG. 5 (), which is divided into I and 0 drivers related to the input section 5, is executed. ) At this time, key function ♂2 indication information (for example, 0, 1, .
2. ...! ) and J) Numerical display) are determined by the display information saving process to be described later, and in the processing step shown in FIG.

712I is a flowchart showing power outage processing regarding display data such as the I-CD 1 shown in the first figure and the IT display screen in the key input unit 5 described above (4F). Figure 7 I
According to JF Tae Yukima, in step f1 of Fig. 7 (1),
The location Fl provided in the terminal device 2! 'The device 3 etc. generates display data ('P. This display data is
For example, the characters shown in the bin l on the CD-t.
-In addition to the data, it also includes display control information for the character, ie, display start position, etc.

In step f2, based on such bit data and display control data, a bit image is developed in the image storage unit 13 configured in the internal storage unit 8 shown in FIG. 1, and LCD, 1, 2? - The image is displayed on the display screen of the input unit 5, and the process ends. During this process, an interrupt due to a power outage occurred, and the process was carried out in the 71st
The process moves to step f11 of 1Z(2), and the pid data of the currently displayed image is stored in the work area 9, and in step f12, the display control information described above is also saved to the work area 9, etc. .

As described above, according to this embodiment, for example, P.

When a power outage occurs in S system 11, etc., interrupt control is performed on the ■7'0 driver that controls each input/output device according to the task being executed at that time, and the power outage processing as described above is performed in 8. This is done in the I/'O driver. Such a task, ie the O8 in which the application program is executed, only controls the registers associated with the task being executed. In this way, power outage processing is performed in a distributed manner for each of the 1710 drivers, and therefore there is no need to verify the long operating time of the power outage to the CPU, which greatly simplifies the operation and configuration.

Further, in the above-mentioned embodiment, the POS having the configuration shown in the tenth
Although the system has been described, a relay device may be provided between the host computer 1 and the terminal device 2, and this relay device may perform the power outage process of this embodiment as described above.

Effects of the Invention As described above, according to the present invention, interruption processing and restart processing in response to the occurrence of an abnormality are provided in each control program of input/output equipment, and these are activated by interrupt processing for each control 10g. I made it happen. As a result, it is necessary to take an unnecessarily long time to interrupt the data 9A filling when an abnormality occurs, and the specific interruption processing and restart processing are performed as interrupt processing for each control program. It will be possible to significantly reduce the burden on the operating system that processes the data.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an electrical configuration according to an embodiment of the present invention, FIG. 2I2I is a flowchart outlining the power outage process of this embodiment, FIG. 4 [1 is a flowchart explaining the task processing of this embodiment, FIG. 5 is a flowchart showing details of the power outage processing of this embodiment, and FIG. 6 is Tough Chi! FIG. 7 is a flowchart illustrating power outage processing related to display data. ■...Pos [・co>'>' router, 2...Terminal device, 3
...processing device, 4...L CD, 5...key input unit,
8.-internal storage section, 9.. work area, 10..
Task area, 11... access area (main area, 12... flag area)

Claims (1)

[Claims] A method for performing data processing using input/output devices in a multitasking manner, which includes an interruption process that interrupts ongoing data processing when an abnormality occurs, and an interruption process that is interrupted when the abnormality is resolved. 1. A data processing method characterized in that a restart process for restarting data processing from a point where the data processing was restarted is performed for each control program that controls each input/output device.