| 基于CPLD的VFD显示和键盘扫描设计 |
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| 引用本文： | 成聪,汪道辉. 基于CPLD的VFD显示和键盘扫描设计[J]. 机械工程与自动化, 2006, 0(1): 99-101,104 |
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| 作者姓名： | 成聪 汪道辉 |
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| 作者单位： | 四川大学,电气信息学院,四川,成都,610065 |
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| 摘 要： | 键盘与显示是单片机应用系统常备的输入输出设备。提出了一种在CPLD中进行键盘列扫描和VFD栅极扫描，并通过CPLD将键盘行输入数据读入CPU和将VFD阳极数据送到VFD的设计思想；在键盘扫描设计中，出于实际应用和提高效率，采用中断和对比键扫描值的方式以消除抖动。
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| 关 键 词： | 键盘 扫描 |
| 文章编号： | 1672-6413（2006）01-0099-03 |
| 收稿时间： | 2005-08-06 |
| 修稿时间： | 2005-08-062005-10-08 |
Design of VFD Display and Keyboard Scan Based on CPLD |
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| CHENG Cong,WANG Dao-hui. Design of VFD Display and Keyboard Scan Based on CPLD[J]. Mechanical Engineering & Automation, 2006, 0(1): 99-101,104 |
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| Authors: | CHENG Cong WANG Dao-hui |
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| Affiliation: | Sichuan University,Chengdu 610065,China |
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| Abstract: | The keyboard & display is common I/O parts of SCM application system.A method of carrying on keyboard's row scanning and VFD grid scanning in CPLD,and reading the keyboard's line data into CPU and writing the VFD's filament data to VFD is presented in this paper.In the design of keyboard scanning,to the concern of practical application and improving efficiency,we adopt the way of interrupt and comparing the scanning value to avoid vibrating. |
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| Keywords: | VFD CPLD |
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