KR930023811A

KR930023811A - Key matrix recognition method and device

Info

Publication number: KR930023811A
Application number: KR1019920008090A
Authority: KR
Inventors: 성한선
Original assignee: 이헌조; 주식회사 금성사
Filing date: 1992-05-13
Publication date: 1993-12-21

Abstract

본 발명은 키이 매트릭스 인식방법 및 그 장치에 관한 것으로서, 이는 마이콤의 적은 수의 포트로 많은 키이 매트릭스를 입력 처리하여 인식할 수 있도록 한 것이다.The present invention relates to a key matrix recognition method and an apparatus thereof, which enables input processing of a large number of key matrices with a small number of ports of the microcomputer.

이와같은 본 발명은 적어도 하나 이상의 다이오드와 저항이 순차적으로 직렬 접속된 제1 매트릭스(10) 및 이와 역방향으로 순차적으로 접속된 제2 매트릭스(20)의 사이에 키이스위치(K1-Kn)를 순차적으로 접속하여 그 키이스위치의 키이 스위칭에 따라 전압을 변화시켜 출력하는 키이매트릭스부(1)와, 상기 키이매트릭스부(1)의 제1 매트릭스(10) 및 제2 매트릭스(20)로부터 변화되어 출력되는 전압을 제1, 제2 아날로그/디지탈 변환단자(A/D1)(A/D2)로 입력받아 디지탈 변환한 후 그 변화된 전압으로 키이매트릭스부(1)의 키이입력신호를 인식하는 마이콤(2)으로 구성함으로써, 적은 수의 포트로 많은 키이 신호를 인식 처리할 수 있는 것이다.In the present invention, the key switches K1-Kn are sequentially disposed between the first matrix 10 having the at least one diode and the resistor sequentially connected in series and the second matrix 20 sequentially connected in the reverse direction. Connected to the key matrix unit 1 for changing the voltage according to the key switching of the key switch, and the first matrix 10 and the second matrix 20 of the key matrix unit 1 are outputted after being changed. The microcomputer 2 that receives the voltage through the first and second analog / digital conversion terminals A / D1 and A / D2, converts the digital signal, and recognizes the key input signal of the key matrix unit 1 using the changed voltage. By configuring this, a large number of key signals can be recognized and processed with a small number of ports.

Description

Key matrix recognition method and device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명은 키이 매트릭스 인식시스템 구성도, 제3도는 제2도의 동작설명에 대한 신호흐름도.2 is a block diagram of a key matrix recognition system according to an embodiment of the present invention, and FIG. 3 is a signal flow diagram for explaining the operation of FIG.

Claims

A first step of retrieving the output voltage change of the key matrix unit inputted through the first and second analog / digital conversion terminals; and adding and storing each changed and input voltage when there is a change in the searched voltage. Step 2, comparing the added voltage to reach a constant voltage, and when the added voltage does not reach a constant voltage, determining a two or more key signal inputs, and comparing the added voltage with a constant result When the voltage is reached, the fourth step of searching for the input voltage value of the first analog / digital conversion terminal as the key value and searching whether the key value is a new value, and setting the key input time if the searched key value is the new value, A fifth step of performing a key and, if the searched key value is a previous value, subtracts a current key input time and sets a new key input time. And a seventh step of searching for whether the key input time has elapsed, and performing a key operation if the key input time has elapsed, and terminating the key input operation if it has not elapsed.

Key switches K1-Kn are sequentially connected between the first matrix 10 having at least one diode and the resistors sequentially connected in series and the second matrix 20 sequentially connected in the reverse direction, and the keyswitch The key matrix unit 1 for changing the voltage according to the key switching of the key matrix unit 1 and the voltage outputted from the first matrix 10 and the second matrix 20 of the key matrix unit 1 are outputted to the first matrix unit 1. A key including a microcomputer 2 that receives a second analog / digital conversion terminal A / D1 (A / D2), performs digital conversion, and recognizes a key input signal of the key matrix unit 1 with the changed voltage. Matrix recognition device.

※ Note: The disclosure is based on the initial application.