針對(duì)目前使用的RS232接口數(shù)字化B超鍵盤(pán)存在PC主機(jī)啟動(dòng)時(shí)不能設(shè)置BIOS,提出一種PS2鍵盤(pán)的設(shè)計(jì)方法。基于W78E052D單片機(jī),采用8通道串行A/D轉(zhuǎn)換器設(shè)計(jì)了8個(gè)TGC電位器信息采集電路,電位器位置信息以鍵盤(pán)掃描碼序列形式發(fā)送,正交編碼器信號(hào)通過(guò)XC9536XL轉(zhuǎn)換為單片機(jī)可接收的中斷信號(hào),軟件接收到中斷信息后等效處理成按鍵。結(jié)果表明,在滿(mǎn)足開(kāi)機(jī)可設(shè)置BIOS同時(shí),又可實(shí)現(xiàn)超聲特有功能,不需要專(zhuān)門(mén)設(shè)計(jì)驅(qū)動(dòng)程序,接口簡(jiǎn)單,成本低。 Abstract: Aiming at the problem of the digital ultrasonic diagnostic imaging system keyboard with RS232 interface currently used couldn?蒺t set the BIOS when the PC boot, this paper proposed a design method of PS2 keyboards. Based on W78E052D microcontroller,designed eight TGC potentiometers information acquisition circuit with 8-channel serial A/D converter, potentiometer position information sent out with keyboard scan code sequentially.The control circuit based on XC9536 CPLD is used for converting the mechanical actions of the encoders into the signals that can be identified by the MCU, software received interrupt information and equivalently treatmented as key. The results show that the BIOS can be set to meet the boot, ultrasound specific functionality can be achieved at the same time, it does not require specially designed driver,the interface is simple and low cost.
標(biāo)簽: 單片機(jī) B超 數(shù)字化 鍵盤(pán)設(shè)計(jì)
上傳時(shí)間: 2013-10-10
上傳用戶(hù):asdfasdfd
本文開(kāi)發(fā)了一套基于J2EE技術(shù)的新兵思想評(píng)估系統(tǒng)。該系統(tǒng)基于多層B/S軟件架構(gòu),提高了系統(tǒng)的穩(wěn)定性、靈活性及安全性;通過(guò)使用UML的系統(tǒng)分析,MVC、DAO等設(shè)計(jì)模式及面向?qū)ο螅ǎ郑茫┑脑O(shè)計(jì)和開(kāi)發(fā),采用Spring、Hibernate、WebWork等框架技術(shù),提高了開(kāi)發(fā)的效率,為相關(guān)系統(tǒng)的設(shè)計(jì)開(kāi)發(fā)探索了一條新思路。
標(biāo)簽: J2EE 評(píng)估系統(tǒng) 多層
上傳時(shí)間: 2013-12-24
上傳用戶(hù):gxf2016
This project attempts to implement a Database using B+Tree. The project has developed a DATABASE SYSTEM with lesser memory consumption. Its API includes simple SQL Statements and the output is displayed on the screen. Certain applications for which several features of existing databases like concurrency control, transaction management, security features are not enabled. B+Trees can be used as an index for factor access to the data. Help facility is provided to know the syntax of SQL Statements.
標(biāo)簽: project implement developed Database
上傳時(shí)間: 2013-12-25
上傳用戶(hù):semi1981
JAVA B/S struts,Hibernian,spring 整合簡(jiǎn)單項(xiàng)目
上傳時(shí)間: 2013-12-20
上傳用戶(hù):xaijhqx
21世紀(jì)大學(xué)新型參考教材系列 集成電路B 荒井
上傳時(shí)間: 2013-04-15
上傳用戶(hù):eeworm
家電維修(最基礎(chǔ)的教程B)1-20.Torrent
上傳時(shí)間: 2013-06-10
上傳用戶(hù):eeworm
jk-b交通信號(hào)控制機(jī)原理圖
標(biāo)簽: jk-b 交通信號(hào) 控制機(jī) 原理圖
上傳時(shí)間: 2013-07-13
上傳用戶(hù):eeworm
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標(biāo)簽: jk-b 1.3 zip 交通信號(hào)
上傳時(shí)間: 2013-08-02
上傳用戶(hù):zhf1234
專(zhuān)輯類(lèi)-電子基礎(chǔ)類(lèi)專(zhuān)輯-153冊(cè)-2.20G 21世紀(jì)大學(xué)新型參考教材系列-集成電路B-荒井-159頁(yè)-2.8M.pdf
上傳時(shí)間: 2013-05-16
上傳用戶(hù):pkkkkp
三次B樣條曲線(xiàn)源代碼,C語(yǔ)言編寫(xiě)的三次B樣條曲線(xiàn)源代碼,希望大家喜歡。
標(biāo)簽:
上傳時(shí)間: 2013-07-13
上傳用戶(hù):chengli008
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