JPS63170723A - Keyboard control system - Google Patents

Abstract

PURPOSE:To input keys in plural modes different in specifications such as the number of keys with only one keyboard unit by discriminating whether the output of a key is permitted or not in each indicated mode to output a prescribed key code. CONSTITUTION:A keyboard controller 3 scans a keyboard unit (KB) 4; and when a CPU 1 issues a mode switching command, the controller 3 discriminates whether return data obtained from the KB 4 in a preliminarily set mode corresponds to a key whose output is permitted or not. This discrimination is performed by referring to an incorporated key code conversion table. If said return data corresponds to a key whose output is permitted, the key code is outputted; but otherwise, output of the key code is inhibited. Thus, keys are inputted in plural modes different in specifications such as the number of keys with only one KB 4.

Description

[Detailed Description of the Invention] [Objective of the Invention (Field of Industrial Application) Does the present invention have only one key? ? - relates to a keyboard control method that allows a board unit to be used in multiple modes.

(Prior Art) Recently, ScanTig keyboards have been used as standard. This type of keyboard scans the key matrix twice at an interval of 5 milliseconds, for example, and when both are turned on, the new buffer that stores that key code and the key that was pressed the last time it was scanned. By comparing the contents of the old buffer where the code is stored, it is determined whether the key has been pressed or released.

(Problems to be Solved by the Invention) Generally, only one keyboard unit is connected to the system. However, the keymate unit should be selected depending on the business.1 For example, for word processing applications.

There are types suitable for each type of computer use.

Word processors and personal computers have different keyboard layouts and different numbers of keys. Therefore, if only one type of keyboard unit is connected, it may be inconvenient depending on the job.9. This has the disadvantage of adversely affecting operability.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide a keyboard control method that allows input in a plurality of modes having different specifications such as the number of keys using only one keyboard unit.

[Structure of the Invention] (Means for Solving the Problems) The present invention enables key input control in a plurality of uniformly different modes (word processor/personal computer) using only one keyboard unit. It is configured to do this. For this purpose, the CPU uses ノ=r? to switch modes. 7)”
'x Issue L In addition, the keymate controller is equipped with a code conversion table for each mode, and is equipped with a mechanism that determines whether or not the key is permitted to output for each mode and outputs a predetermined key code. Ru.

(Function) In the above configuration, the keypad controller scans the keyboard unit.

The mode in which the CPU should operate is set in advance. In the mode set here, it is determined whether the return data from the keyboard unit is a key that is permitted to be output, and if it is a permitted key, that key code is sent to a key that is not permitted. Anba Prohibits output of the key code.

This allows for multiple modes (word processing/PC).
eCan be covered by one keyboard unit.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, 1 is a CPU, which is the control center of the system. 2 is a memory, and a CPU 1 controls each input/output device (keyboard unit 4, etc.) connected to the system based on the program stored here.

3 is a keyboard controller incorporating a memory (not shown) for storing programs or data. The keyboard controller 3 stores the f70-chart shown in FIG. 2 in a program format, and also stores key code conversion tables for each mode. 5 is a system bus consisting of multiple lines for address e data φ control; p, cPUl, memory 2. A key date controller 3 is commonly connected.

FIG. 2 is a flowchart showing the operation of the embodiment of the present invention.

Hereinafter, the operation of the embodiment of the present invention shown in FIG. 1 will be explained in detail with reference to the flowchart shown in FIG. First, the keyboard controller 3 is connected to the keyboard unit 4.
A scan signal is issued to the target and its return data is obtained. Note that the key go controller 3 is preset to manual mode, and the flag (keyboard controller 3
stored in internal memory). This data setting is performed by the CPU 1 issuing a mode switching command.

Next, the key code controller '-1 determines whether the return data obtained from the keyboard unit 4 in the specified mode is a key whose output is being measured.This is based on the built-in key code conversion table. A word referring to is executed. If the key is allowed to be output here, the key code is output.

If the key is not allowed to be output, output of the key code is prohibited.

[Effects of the Invention] As explained above, according to the present invention, it is possible to manually operate keys in a plurality of modes having different specifications such as the number of keys with only one keypad unit. Therefore, a keygod system with excellent cost performance can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the embodiment of the present invention. 1...CPU...? ...Memory, 3...Keyboard controller, 4...Keyboard unit. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Claims] A keyboard control device that performs key input control on a single keyboard unit in a plurality of modes having different numbers of keys, which is equipped with a means for instructing the above modes and a code conversion table for each mode, and scans the above keys to obtain the instructions. 1. A keyboard control system comprising: key input control means for determining whether or not a key is permitted to be output for each mode and outputting a predetermined key code.