JPS61226821A - Keyboard control system - Google Patents

Abstract

PURPOSE:To prevent the misoperation of a special key by receiving key information when the pressure of the key is the prescribed time or above and refraining the input of the key information when it is the prescribed time or below, when the pressure of the special key of the keyboard is detected. CONSTITUTION:The key input of a keyboard 12 is detected by a keyboard control part 10, a timer 14 gives interruption to the control at every constant time T1 and by the interruption, the control part 10 executes the key detecting/ input routine. The control part 10 when it detects the pressure of a resetting key 13, operates a timer 15 and discriminates whether or not the pressure time is T2>=T1 or above. When the pressure time of the key 13 is T2 or above, the control part 10 receives the input of the key 13 and initializes the key input. When the pressure time of the key 13 is T2 or below, the control part 10 refrains the input of the resetting key 13 and the misoperation of the resetting key is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a keyboard control method for controlling input of key information of operated keys.

[Technical background of the invention and its problems]

One of the various keys arranged on the keypad is a key called "reset" or "clear" (hereinafter referred to as the reset key).

This reset key returns the system to its initial state (
(i.e., system clear) is used to specify t-. In consideration of operability, the reset key is disposed close to and on the same plane as other keys such as characters and numbers. Ninth, there are cases where the user accidentally touches the reset key while operating the keyboard, causing the system to return to its initial state. In particular, if this type of situation occurs during data input, all the data that has been input over time will be lost, so there is a strong demand for prevention of erroneous operation of the reset key.

Therefore, in order to prevent erroneous operation of the reset key, conventionally (1) the reset key is colored in a conspicuous color such as red.

■ Increase the spring properties of the reset key's spring mechanism so that it does not operate unless it is pressed strongly.

The following methods have been proposed. However, these methods were not able to achieve sufficient effects.

[Purpose of the invention]

This invention was made in view of the above circumstances, and its purpose is to ensure that even if a special key that has an important effect on the system, such as a reset key, is accidentally operated, the operation specified by the key will still be performed. Is there a key that can prevent this? - To provide a control method.

[Summary of the invention]

In this invention, the key detection means detects whether or not a key provided on the keyboard has been operated at a time T1.
It is done at intervals. The key detection result of the key detecting means is transmitted to the determining means, and the determining means thereby determines whether the key detected by the key detecting means is a specific key or not. When the determining means determines that the detected key is not a specific key, the corresponding key information is inputted by the first input means. On the other hand, when inputting key information for a specific key, the detection means determines that the detected key is the specific key at a time T2 (
r, g) Tz) Only when the above determinations are made consecutively, the second
It is input by an input means.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

The first rIA is a keyboard control unit 10 to which the present invention is applied.
The surrounding configuration is shown below. The keyboard control unit 10 has elements necessary for keyboard control, such as a microprocessor, a control ROM, and a memory (none of which are shown). ] The keyboard x2 is connected to the keymate 12. Various keys including a reset key 13 are provided on the keyboard x2.
A timer 14 that issues an interrupt (timer interrupt) every ms) and a timer 15 that performs a time measurement operation under the control of the control section 10 are connected.

Next, the operation of one embodiment of the present invention will be explained with reference to chart 70 in FIG. The timer 14 issues an interrupt to the keyboard control unit 10fIC at fixed intervals, for example every 20 ms. The key-and-key controller 10 executes the key detection/input routine shown in FIG. 2 in response to an interrupt from the timer 14. First, the keyboard control unit 10
Check whether any of the keys arranged in 2 has been pressed (i.e., a key has been operated) (Stella fS1)
. If any of the keys in the group is pressed, the keyboard control unit 10 reads out the key code (key position information) of the unpressed key from the read line 11. Ilk (step 82). Next, the keyboard control unit 10 converts the captured key code into a corresponding character (A e B t 1 # 2 . . .・・・－・・）
(Stella f83). Is the operation from steps 81 to S3 described above similar to the conventional key? - Same as in the case of mode control.

When the keyboard control unit 10 finishes Stella f83, the key input information obtained in step S3 is input to a specific key (a key whose operation is to be prevented due to erroneous operation), for example, the reset key 1.
Check whether it shows 3 (step 84)
. If it is the reset key 13, the keyboard control unit 1
0 checks whether the timer value of the timer 15 is @0'' (that is, whether the timer 15 is not activated) (step S5). If the timer value of the timer 15 is 1
If it is 0#, the keyboard control unit 10 starts the timer 15 (S6) and ends the key detection/input routine. Then, when the timer 14 issues an interrupt again, the keyboard control section 10 executes the key detection/input routine. At this time, if the reset key 13 is continuously pressed, the keyboard control unit 10 will execute step S5 again. In this case, since timer 15 has already been activated and its timer value is not ``0'',
In Stella fs5, the determination is No.

Key? - When the determination in step S5 is No, the card control unit 10 checks whether the timer value of the timer 15 is a predetermined value, for example, 2 seconds or more (step S7). If the timer value of timer 15 has not reached 2 seconds, keyboard controller 10 ends the key detection/input routine.

Thereafter, if the reset key 13 is continuously pressed,
The keyboard control unit 10 repeats steps 81 to 85.87 described above every 20 ms interrupt from the timer 14. When the timer value of the tie 115 becomes 2 seconds or more, the determination in step S7 becomes YES. If the determination in step S7 is πS, the keyboard control unit 10 assumes that the reset key 13 has been pressed for 2 seconds or more (that is, assumes that the key operation of the reset key 13 is not an erroneous operation), and outputs the corresponding key input information. The data is sent to a processing unit (not shown) (step sg), and the timer 15 is reset (Stella fB(J)).

The processing section is connected to the keyboard control section 10 and sets key 1.
The system is initialized by key input information indicating 3.

On the other hand, if the reset key 13 is not suppressed for more than 2 seconds and the determination is No in step S1, for example, the process advances to step S9 and the timer 15 is reset. The detection routine ends, and key input information indicating the reset key 13 is not sent to the processing section. Therefore, even if the reset key 13 is pressed by mistake, the suppression time will not exceed 2 seconds, so there is no possibility that the system will be initialized against the user's will as in the conventional case.

On the other hand, if a key other than reset key 13 is pressed (
(including suppression of other keys following erroneous operation of the reset key 13), the determination in step S4 is NO. In this case, the keyboard control section 10 proceeds to step S8, sends all the corresponding key input information to the processing section, and then performs a process of resetting the timer 15 of the Stella f9.

In the above embodiment, a case has been described in which the key to be prevented from operating due to an erroneous operation is a reset key, but the present invention is not limited to this, and can be similarly applied to a key for specifying a special operation such as erasing a screen, for example. In addition, the minimum value of the suppression time (T2), which is the criterion for determining whether or not the key targeted for prevention of operation due to erroneous operation is pressed correctly or not, can be arbitrarily set in consideration of prevention of operation due to erroneous operation and operability. It is. However, T2 needs to be larger than the key detection time interval (T1). Further, instead of the timer 15, a counting counter may be used to count the number of consecutive key detections of a specific key (reset key 13), and determine whether or not a predetermined number of times has been reached.

〔Effect of the invention〕

As detailed above, according to the present invention, the key input of a special key that has an important effect on the system, such as the reset key, takes a continuous period of time that is more than consciously required compared to key operations of other keys. Therefore, it is possible to prevent the inconvenience that the key information of the key is inputted due to an erroneous operation and the operation specified by the key is executed against the user's intention.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the periphery of a keyboard control unit according to an embodiment of the present invention, and FIG. 2 is a 70-chart for explaining the operation. 10... Keyboard control section, 12... Keyboard,
13...Reset key, 14.15...Timer.

Claims (1)

[Claims] Key detection means for detecting whether or not a key arranged on the keyboard has been operated at a time interval of T1, and a discriminating means for determining whether a key detected by the key detection means is a specific key or not. and a first input means for inputting corresponding key information when the determining means determines that the detected key is not the specific key, and the detected key is the specific key. and a second input means for inputting key information of the specific key when the discrimination means continues to discriminate for a time T2 (T2>T1) or more, and the specific key is not operated continuously for a time T2 or more. A keyboard control method characterized by refraining from inputting key information when the key information is entered.