JPS63127317A - Electronic equipment provided with input device - Google Patents

Abstract

PURPOSE:To prevent chattering without deteriorating input reaction of a key by revising a criterion of a means when it is discriminated that a processing having a higher priority than that of a key input discrimination means is executed. CONSTITUTION:When it is discriminated by a priority processing discriminating means M3 that the processing with higher priority than that of the key input discrimination means M2 is executed, the time required for discrimination is longer sufficiently than the time causing chattering and the criterion of the means M2 is revised by a key input control means M4 so as to avoid unnecessary longer time. That is, prescribed number of time being a criterion in the means M2 is decreased and/or the prescribed time interval at the execution of the discrimination processing of the means M2 is increased to discriminate the key input in the nearly same time when the processing with high priority is not executed. As a result, even if the processing with higher priority than that of the means M2 is executed, the chattering is prevented without deteriorating the input reaction of the key M1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic device including an input device such as an electronic typewriter.

[Prior Art] Conventionally, an electronic typewriter, which is an electronic device equipped with an input device, has been used to manually process keys from a keyboard as an input device, edit an input document, and output the edited document. There are devices in which a single processing device (hereinafter referred to as CPU) performs multiple processes such as printer control processing.

In addition, normally, in the manual key processing in the input device of the electronic typewriter, in order to prevent erroneous inputs due to chattering of the key switches constituting each key, the number of times the key manual routine is executed is a predetermined number or more (for example, 10 or more times). ) When it is determined that the same key has been pressed in succession, a process is performed to allow the input of that key.

When multiple processes are performed by one CPU as described above, this key manual routine is executed by interrupting at predetermined time intervals, and the printer control routine is also executed by interrupting at predetermined time intervals. Note that since printer control requires accurate time control, the printer control routine has a higher priority than the key manual control routine. 1 in Figure 4
The state of the CPU is shown when a single CPU performs multiple processes. FIG. 4(a) shows the interrupt timing of the key manual routine, and FIG. 4(b) shows the interrupt timing of the printer control routine. 4th (21st
In (b), a solid line indicates a case where there is no data to print and the printer is stopped, and a broken line indicates a case where the printer is printing.

Figures 1(c) and 1(d) show how the key manual routine, blink control routine, and main routine for pond processing are executed by the CPU.

The shaded area indicates the execution of the main routine,
``↓'' above indicates execution of a key manual routine, and ``↑'' below indicates execution of a printer control routine.

[Problems to be Solved by the Invention] Fourth [K(c)] When the printer is stopped, the key manual routine is executed at predetermined intervals. However, as shown in FIG. 4(d), when the printer is operating, the printer control routine has a higher priority than the key manual routine as described above, so while the printer control routine is being executed, Key manual routines (marked with "r, i," above) that were supposed to be executed are not executed.

Therefore, the number of times the key manual routine is executed within a unit time is much smaller than when the printer is stopped. However, since confirmation of key input is determined based on the number of key manual routines as described above, the time required to execute the key manual routine by the standard number of determinations becomes extremely long, and the key input is determined based on the number of key manual routines. reaction is delayed.

[Means for Solving the Problems] The present invention aims to solve the above problems, and has the following features:
The following configuration as illustrated in the figure was adopted.

That is, the gist of the present invention is that when it is determined that the same key M1 has been pressed a predetermined number of times, the key M1
In an electronic device equipped with an input device configured to execute the judgment process of the key input discrimination means M2 for inputting data corresponding to the input data at predetermined time intervals, the judgment process of the key input discrimination means M2 has a higher priority than the judgment process of the key input discrimination means M2. A priority processing determining means M3 that determines whether a high priority process is being executed; and when the priority processing determining means M3 determines that a high priority process is being executed, the key input determining means M2
and key input control means M4 for decreasing the predetermined number of times serving as a determination criterion and/or increasing the predetermined time interval in the execution of the determination process of the key input determination means M2. Equipped with electronic equipment.

[Function] Chattering is a physical phenomenon of a key switch.
This occurs for a certain period of time (for example, 3 to 4 [1 sec)] regardless of the execution speed of the program.

In the present invention, when the priority processing determining means M3 determines that a process with a higher priority than the key input determining means ~12 is being executed, the time required for the determination is sufficiently longer than the time when chattering occurs; The criterion of the key input determining means M2 is changed by the key input controlling means M4 so as not to be unnecessarily long. That is, by decreasing the predetermined number of times serving as a determination criterion in the key input discriminating means M2 and/or increasing the predetermined time interval in executing the determination process of the key input discriminating means M2, As a result, even if a high-priority process such as the key input determination means M2 is being executed, the input response of the key M1 is not reduced and chattering is detected. can be prevented.

EXAMPLE An example of the present invention will now be described. In this embodiment, the present invention is applied to an electronic typewriter.

The present invention is not limited to this, but includes various types of deafness without departing from the scope of the invention.

FIG. 2 is a block diagram showing a schematic configuration of the typewriter of this embodiment. The typewriter of this embodiment includes a keyboard 10 having keys for inputting alphabet data, control data, etc., a printer 20, and a control section 30 that controls the overall operation.

This control section 30 includes an input boat 40 connected to the keyboard 10 and an output boat 50 connected to the printer 20.
and the well-known CPtJ60, ROM70
, RAM 80, and timer 90, these are connected to bus 1.
00 and are interconnected.

This control unit 30 has three main programs: a key manual program, a printer control program, and a main program that performs other processing.
As shown in 411(c) and 411(d), the seed program is executed according to the interrupt every predetermined time and the priority of the program. In addition, these three types of programs are stored in ROM7
Various registers, flags, counters, etc. used when executing these programs are allocated to predetermined locations in the RAM 80.

Since the details of the main program and printer control program are not directly related to this embodiment, their explanation will be omitted, and the key manual program will be explained.

First, registers used in this key human program,
Flags and counters will be explained.

Confirmation register: Writes the data when the key input is confirmed.

Input register: Writes the data of the key that was pressed during key scan.

Confirmation flag: A flag that turns on when the key force is confirmed.

ON counter: A counter that indicates the number of consecutive inputs of the same key. When this counter is equal to or greater than a predetermined value, key human power is determined. To prevent chattering when the key is turned on.

OFF counter: A counter that indicates the number of times when a certain key is not pressed or when another key is pressed. When this counter is equal to or greater than a predetermined value, the key-off is confirmed. To prevent chattering when the key is off.

Next, the operation of this program will be explained using the flowchart shown in FIG.

When the CPU 60 is running the main program,
When an interrupt command for a key human-powered program is given to the CPU 60 from the timer 90, this key human-powered program starts execution. The program will be explained below according to the steps in the flowchart.

Step 200: Clear the commit register.

Step 210: Sequentially scan the key switches of the keyboard 10 (key scan).

Step 220: As a result of the key scan, if there is a pressed key, the process moves to the next step 230, and if no key is pressed, the process moves to step 410, which will be described later.

Step 230: Check whether there is input data from the previous execution in the input register, and if there is data, proceed to the next step 240; if not, proceed to step 440, which will be described later.

Step 240: Check whether the data detected by the key scan (-f-ON data) is the same as the previous input data stored in the input register, and if it is the same, proceed to the next step 250 and when the key is turned on. If there is a difference, perform step 3 described later.
Move to 30.

Step 250: [Check whether the fixed flag is on or not. If it is on, that key has already been determined and taken in, so do nothing and end this program. On the other hand, if it is off, the next step 26
Transition to 0.

Step 260: Clear the OFF counter.

Step 270: Increment the ON counter by 1.

Step 280: Determine whether the printer is in operation. If it is not in operation, proceed to step 290; if it is in operation, proceed to step 300. This step and step 350, which will be described later, correspond to priority processing determining means.

Step 290: When the ON counter is greater than the first predetermined number of times (10 in this embodiment), the process moves to step 310 to determine the key power, and when it is less than 10, the process ends without doing anything. Note that this first predetermined number of times is sufficient to prevent chattering, and allows for a considerable degree of safety.

Step 300: When the ON counter is greater than the second predetermined number of times (5 in this embodiment), the process moves to step 310 and the key power is determined. If it is 5 or less, it ends without doing anything. Note that this second predetermined number of times is the minimum number of times necessary to prevent chattering. This step and step 290 described above correspond to key input control means.

Step 310: Turn on the confirmation flag.

Step 320: Transfer the data in the input register to the final register.

Step 330: In step 240 described above, if the data detected by the key scan is different from the input data of the input register, control shifts to this step. In this step, it is checked whether the confirmation flag is on, and if it is on, the process moves to step 340 in order to prevent key-off chattering. If it is off, the process moves to step 440, which will be described later.

Step 340: Increment the OFF counter by 1.

Step 350 - Determine whether the printer is in operation. If it is not in operation, proceed to step 360; if it is in operation, proceed to step 370.

Step 360: The OFF counter is set a first predetermined number of times (1
0), the process moves to step 380 and the key-off is determined. When the number is 10 or less, the process ends without doing anything.

Step 370: The OFF counter is set a second predetermined number of times (5
), the process moves to step 380 and the key-off is determined. If it is 5 or less, it ends without doing anything.

Steps 380-400: Now that the key is turned off,
Clears the input register and OFF counter, and resets the confirmation flag.

Step 410: If it is determined in step 220 that no key is pressed as a result of the key scan, the process moves to this step. In this step, it is determined whether or not the confirmation flag is on. If it is on, it means that the key-off has not yet been confirmed, so the process moves to the above-mentioned step 340, and if it is off, the process moves to the next step 420.

Steps 420-430: Clear input registers and ON counters. Then exit the program.

Steps 440 and 450: If it is determined in step 230 that there is no data in the input register, or if it is determined in step 330 that the confirmation flag is off, the process moves to this step. In steps 440 and 450, processing is performed when a new key is pressed. That is, the ON counter is cleared and the data detected by the key scan is stored in the input register. Then exit the program.

In the above key manual program, the key is ON while the printer is operating.
The number of conditions for determining the counter or OFF counter is reduced. Therefore, it has a higher priority than key manual programs such as printer operation, and
Even when performing processing that requires a large amount of time to occupy U60,
It does not reduce the key human response.

In addition, in the above-mentioned key manual program, the judgment conditions of the ON counter or OFF counter are changed according to the operating state of the printer, but in addition to that, the interrupt interval of the key manual program is changed according to the operating state of the printer. You can do it like this. In other words, when the printer is operating, the interrupt interval is made longer than when the printer is stopped, so that the CPU
This is to avoid increasing the load on 60 as much as possible.

[Effects of the Invention] By adopting the above-described configuration, the present invention prevents chattering without reducing the key input response even when a process with a higher priority than the key input determination means is being executed. can.

Therefore, it is possible to quickly and reliably input keys even when the printer is in operation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating the configuration of the present invention, FIG. 2 is a block diagram showing a schematic configuration of an embodiment of the present invention, and FIG. 3 (A
>, (,B), (C) are flowcharts 1 and 4 (a), (b), (c) explaining the program of the same embodiment.
) and (d) are explanatory diagrams showing the processing states of the CPU during key manual interruption, printer interruption, printer stop, and printer operation, respectively. Ml...key, M2...key input determination means, ~13
...Priority processing determining means, M4...Key input control means, 10...Keyboard, 20...Printer, 30.
・Control unit

Claims (1)

[Claims] When it is determined that the same key has been pressed a predetermined number of times,
In an electronic device equipped with an input device configured to execute the judgment process of the key input discrimination means for inputting data corresponding to the key at predetermined time intervals, a priority processing determining means for determining whether or not a high priority process is being executed; and when the priority processing determining means determines that a high priority process is being executed, the key input determining means makes a determination; An electronic device equipped with an input device, comprising key input control means for decreasing the predetermined number of times as a reference and/or increasing a predetermined time interval in executing the determination process of the key input discriminating means. .