BR9705404A - Método e aparelho de escaneamento de teclado de interrupção-acionamento - Google Patents

Método e aparelho de escaneamento de teclado de interrupção-acionamento

Info

Publication number
BR9705404A
BR9705404A BR9705404-6A BR9705404A BR9705404A BR 9705404 A BR9705404 A BR 9705404A BR 9705404 A BR9705404 A BR 9705404A BR 9705404 A BR9705404 A BR 9705404A
Authority
BR
Brazil
Prior art keywords
key
interrupt
keyboard
pressed
valid
Prior art date
Application number
BR9705404-6A
Other languages
English (en)
Inventor
Daniel F Zimmerman
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of BR9705404A publication Critical patent/BR9705404A/pt

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
    • H03M11/20—Dynamic coding, i.e. by key scanning

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

<B>MéTODO E APARELHO DE ESCANEAMENTO DE TECLADO DE INTERRUPçãO-ACIONAMENTO<D>. O método e aparelho de escaneamento de teclado de interrupção-acionamento interpretam precisamente pressões de tecla em aplicativos de uma única pressão de tecla. Inicialmente, interrupções (16, 26, 36, 46) associadas a cada linha de coluna (10, 20, 30, 40) de uma matriz de teclado (70) são ajustadas para disparar quando uma tecla é pressionada. Uma vez que uma interrupção dispara, um microcontrolador (99) pesquisa as linhas de fileira (15, 25, 35, 45, 55, 65) para determinar qual tecla, caso exista, foi pressionada validamente. Se exatamente uma pressão de tecla te é detectada, a pressão de tecla é válida. Em seguida, a interrupção para a linha de coluna de tecla válida é habilitada enquanto as outras interrupções da linha de coluna são desabilitadas. Quando uma interrupção seguinte é recebida, o teclado retorna ao estado de escaneamento de fileira para determinar quais teclas são pressionadas. Se nenhuma tecla é pressionada, o que ocorre quando a tecla pressionada válida é liberada, o teclado retorna ao estado de detecção de pressão de tecla. O método também interpreta pressões de tecla patológicas, como uma inversão de tecla, pressões de tecla múltiplas e tecladas erradas.
BR9705404-6A 1996-11-20 1997-11-03 Método e aparelho de escaneamento de teclado de interrupção-acionamento BR9705404A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/753,075 US5760714A (en) 1996-11-20 1996-11-20 Interrupt-driven keypad scanning method and apparatus

Publications (1)

Publication Number Publication Date
BR9705404A true BR9705404A (pt) 1999-10-13

Family

ID=25029045

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9705404-6A BR9705404A (pt) 1996-11-20 1997-11-03 Método e aparelho de escaneamento de teclado de interrupção-acionamento

Country Status (3)

Country Link
US (1) US5760714A (pt)
CN (1) CN1130620C (pt)
BR (1) BR9705404A (pt)

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US6980135B2 (en) * 2002-01-11 2005-12-27 Alcor Micro, Corp. Logic circuit using hardware to process keyboard scanning
TW563147B (en) * 2002-10-16 2003-11-21 Htc Corp Push button device and its operation method
US7099684B2 (en) * 2002-12-30 2006-08-29 Motorola, Inc. Method and apparatus for protecting against an inadvertent keystroke
WO2004077679A1 (en) * 2003-02-28 2004-09-10 Infineon Technologies Ag Method and apparatus for decoding a key matrix
US7453376B2 (en) * 2004-09-09 2008-11-18 Hewlett-Packard Development Company, L.P. Method, apparatus, and computer-readable medium for key press determination
KR100577271B1 (ko) * 2004-10-13 2006-05-10 엘지전자 주식회사 키 인식 장치 및 방법
KR100664186B1 (ko) * 2004-12-22 2007-01-03 엘지전자 주식회사 이동통신 단말기의 키 제어 장치 및 방법
JP4406622B2 (ja) * 2005-07-29 2010-02-03 アルプス電気株式会社 入力装置
TW200740230A (en) * 2006-04-13 2007-10-16 Coretronic Corp Projecting apparatus and key input apparatus thereof
US7809867B2 (en) * 2007-11-14 2010-10-05 Fluke Corporation Keypad de-bouncing apparatus and method
CN101644960A (zh) * 2008-08-08 2010-02-10 深圳富泰宏精密工业有限公司 组合键防误触方法及使用该方法的电子装置
US20100064061A1 (en) * 2008-09-05 2010-03-11 Apple Inc. Providing substantially immediate action in response to input event
CN101510127B (zh) * 2009-03-30 2012-10-17 无锡中星微电子有限公司 一种实现键盘模块复合键功能的方法、装置和芯片
CN102075194B (zh) * 2009-11-23 2015-03-11 鸿富锦精密工业（深圳）有限公司 键盘扫描电路和方法及电子设备
CN102111159B (zh) * 2010-12-27 2013-03-20 青岛文达通科技股份有限公司 键盘扫描电路及其扫描方法
US20130249714A1 (en) * 2012-03-20 2013-09-26 Chia-Chu HO Keypad module and detecting method for keypad matrix
CN103257716B (zh) * 2013-05-14 2015-11-18 湖南工业大学 一种低功耗键盘及其扫描定位方法
CN105929971A (zh) * 2016-05-10 2016-09-07 青岛海信电器股份有限公司 一种按键识别方法及装置
CN111049528B (zh) * 2019-10-28 2022-02-11 珠海格力电器股份有限公司 一种组合按键的扫描方法、系统、电子设备和存储介质
CN110932733B (zh) * 2019-11-29 2023-08-22 百富计算机技术（深圳）有限公司 按键扫描方法及输入设备
US11296721B1 (en) 2021-06-16 2022-04-05 Aaeon Electronics, Inc. System, apparatus, and method for controlling an electronic device

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US4617554A (en) * 1983-08-26 1986-10-14 Zenith Electronics Corporation Keyboard scanning
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US5486824A (en) * 1994-10-05 1996-01-23 Motorola, Inc. Data processor with a hardware keyscan circuit, hardware keyscan circuit, and method therefor

Also Published As

Publication number Publication date
US5760714A (en) 1998-06-02
CN1130620C (zh) 2003-12-10
MX9708936A (es) 1998-05-31
CN1195132A (zh) 1998-10-07

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Legal Events

Date Code Title Description
B06A Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]
B11B Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements