JPS5960534A - Key input control device - Google Patents

Abstract

PURPOSE:To execute effectively a self-repeat by setting an FF by a response signal of a key switch, sending its output to a processing device, supplying an output of the processing device to the FF through a one-shot circuit, and resetting the FF. CONSTITUTION:When a key switch of a keyboard 5, for instance, 611 is depressed, a return signal 7a is outputted to a scanning signal 4a. When this signal 7a is inputted to a keyboard controller 1, an interruption request signal 8 is sent to a processing device 10 from the controller 1, and code information 16 of the depressed key is also sent to the device 10. On the other hand, an FF13 is set once by the signal 7a from the keyboard 5, but it is reset in a period of time when the signal 8 is outputted and an output signal 12 is supplied from a one-shot circuit 11. When the signal 7a exists continuously, the FF13 is set again. This repetition is executed while the signal 7a is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a human-powered control device, and more particularly to a human-powered control device that can easily implement a t-key repeat function.

[Background technology and problems of the invention]

Conventionally, when a keyboard device has a repeat function, that is, when a specific key switch data is continuously pressed among a plurality of switches, the coded signal of this key switch is transmitted to a predetermined value. The function of repeatedly inputting data at time intervals of
-There was a drawback of increased costs as additional hardware was required.

[Object of the Invention] An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a key manual control device that can easily perform self-repeat control using the firmware control 11 of a microprocessor. [Embodiments of the Invention] ] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1 showing an embodiment of the present invention, reference numeral 1 denotes a keyboard controller, and a scan ts No. 2 rr is output from the keyboard controller l at a constant period.
One is decoded and scanned by decoder 3 (No. 2 4 a
It becomes +4b and can be input into the keychain 5. ,-P
- hold 5 on the intersection of the matrix - switch 61
1.612. ...6mn is provided, return 1M No. 7
a, 7b are transferred to the keychain controller l. Here, the scan signal 4B and return signal 7a are other scan signals 4b1, return signal 47. This is shown to distinguish from the signals 4a and 4a in this practical example.
The key switch 611 at the intersection of +7a is treated as a repeat key. keyboard 5
When the 1,000-switch is pressed, an interrupt signal 8 is input from the keyboard controller 1 to the processing device (micro-brouter) in response to the return signal 1, and the interrupt signal 8 is also input to the one-shot circuit 1. . The flip-flop 3 is set by the return signal 7a from the keyboard 5, and is also reset to the output signal 12 from the one-shot circuit 11, and the 1st output 1h is transferred to the processing device 0 via the inverter 15. .

In such a configuration, its operation is shown in Figure 2 (Al-(
This will be explained with reference to the time chart of Fl.

First, the keyboard controller L runs f at a predetermined period.
Signal 2 is repeatedly output from decoder 3 to keychain 5.
Each key switch row (611, 621,
-, 6ml), (612,622,=-,6m2
).

-=, (61n, 62n・=, 6mn)
FH No. 4a moving.

4b is output, and the input status of each key switch is constantly checked. Suppose that, for example, when the key switch 611 is pressed, an output bulk appears as shown in FIG. 2(B) in response to the scan signal 4a (FIG. 2A) in the return signal 7a of the thousand-hold 5. At this time, an interrupt request signal 8C is sent from the keyboard controller 1 to the processing @
C) in FIG. 2 is output, and at the same time, the code information of the pressed key is output via the data line 16. The flip-flop 13 is turned off once (at time T) by the return signal 7a from the board 5, but the interrupt request signal 8 is output and the one-shot circuit 11 outputs the signal shown in the 21st gate (D). While the signal 12 is being output, the flip-flop 13 is reset (time TL) as shown in the 21st section (F).

The one-shot circuit L2 sets the time until the self-repeat starts working, and a time width of about 0.5 seconds is usually selected. When the operation of the one-shot circuit Il is completed, the flip 70 block f3 receives one hit again from the return signal 7aK from the keyboard 5 (time T2). If the key switch 611 is not pressed continuously, the flip float 3 is set again~ On the other hand, the output signal of the flip 70 cup 13 is
5 and is input to the processing device 10, and the state of the output signal [6 is monitored at regular intervals. In addition, the monitoring station JtJItj
Corresponds to the repetition period of self-repeat. Therefore, if the flip-flop 13 is turned off again, the processing device 10 determines that it is a repeat, and resets the flip-flop 70 (time T3) by the output signal (4) shown in FIG. , if the return signal 7a continues to exist, the flip-flop J3 is set again [time T
4) The output signal 16 causes the processing block @IO to determine that the loop is a repeat, and then resets the flip-flop 13 (time T5). This operation is repeatedly executed while the signal 7a is being output. On the other hand, if the return signal 7a from the Gyuichi hoard 5 is interrupted midway, or if another key switch is pressed, an interrupt request signal 8 is sent from the keyboard controller 1 to the processing device. Since the one-shot circuit 11 is activated, 7 rip 70 is output.
Tsubue 3 is forcibly set to the reset state. Therefore, self-repeat processing is not performed during the operation period of the one-shot circuit 11.

〔Effect of the invention〕

As explained above, according to the human-powered control device of the present invention, self-repeat processing can be easily realized by adding a small amount of circuitry, and it is economical.

In addition, since it uses the firmware system fully utilized in MicroPro, there are no restrictions on the number of repeats or the repetition period, which can be changed dynamically.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a key manual control device to which this invention is applied, and zfml(A) to zfml(F) are time charts showing an example of its operation. 1...Scanning device N, 3...Decoder, 5...Keyboard, 611, 612. ..., 6mn...1,000-switch, 10...processing device (microprocessor),
11... One-shot circuit, [3... Flip 70
Whelk.

Claims (1)

[Claims] a. a plurality of thousand-switches, and br\r! Scan 1 for row or column of keyswitch
a keychain controller that outputs a response signal No. 8 and receives a response signal from the key switch; and a processing device that receives an interrupt signal and a code signal output from the keychain controller based on response response No. , d, a frit-tub float float which is set by the response signal of the repeat key, outputs the fdi interrupt signal, and resets after a predetermined time rfJl; 1,000,000-manpower control device, characterized in that the processing device determines 1 ref repeat based on the output signal of the flip-flop.