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基于單片機(jī)的數(shù)字化B超鍵盤(pán)設(shè)計(jì)

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

TKS仿真器B系列快速入門(mén)

TKS仿真器B系列快速入門(mén)

標(biāo)簽： TKS 仿真器 快速入門(mén)

上傳時(shí)間： 2013-10-31

上傳用戶(hù)：aix008

NCV7356單線(xiàn)CANBUS收發(fā)器數(shù)據(jù)手冊(cè)

The NCV7356 is a physical layer device for a single wire data linkcapable of operating with various Carrier Sense Multiple Accesswith Collision Resolution (CSMA/CR) protocols such as the BoschController Area Network (CAN) version 2.0. This serial data linknetwork is intended for use in applications where high data rate is notrequired and a lower data rate can achieve cost reductions in both thephysical media components and in the microprocessor and/ordedicated logic devices which use the network.The network shall be able to operate in either the normal data ratemode or a high-speed data download mode for assembly line andservice data transfer operations. The high-speed mode is onlyintended to be operational when the bus is attached to an off-boardservice node. This node shall provide temporary bus electrical loadswhich facilitate higher speed operation. Such temporary loads shouldbe removed when not performing download operations.The bit rate for normal communications is typically 33 kbit/s, forhigh-speed transmissions like described above a typical bit rate of83 kbit/s is recommended. The NCV7356 features undervoltagelockout, timeout for faulty blocked input signals, output blankingtime in case of bus ringing and a very low sleep mode current.

標(biāo)簽： CANBUS 7356 NCV 單線(xiàn)

上傳時(shí)間： 2013-10-24

上傳用戶(hù)：s藍(lán)莓汁

一個(gè)簡(jiǎn)單好用的B+樹(shù)算法實(shí)現(xiàn)

一個(gè)簡(jiǎn)單好用的B+樹(shù)算法實(shí)現(xiàn)

標(biāo)簽： 樹(shù) 算法

上傳時(shí)間： 2015-01-04

上傳用戶(hù)：縹緲

一個(gè)用Basic實(shí)現(xiàn)的B-Tree算法

一個(gè)用Basic實(shí)現(xiàn)的B-Tree算法

標(biāo)簽： B-Tree Basic 算法

上傳時(shí)間： 2013-12-30

上傳用戶(hù)：ccclll

一個(gè)用Java applet實(shí)現(xiàn)的B-Tree算法

一個(gè)用Java applet實(shí)現(xiàn)的B-Tree算法

標(biāo)簽： B-Tree applet Java 算法

上傳時(shí)間： 2013-12-25

上傳用戶(hù)：qiao8960

用C++實(shí)現(xiàn)的B-Tree算法

用C++實(shí)現(xiàn)的B-Tree算法

標(biāo)簽： B-Tree 算法

上傳時(shí)間： 2014-01-20

上傳用戶(hù)：jiahao131

用Borland C寫(xiě)的B-Tree算法

用Borland C寫(xiě)的B-Tree算法

標(biāo)簽： Borland B-Tree 算法

上傳時(shí)間： 2014-12-05

上傳用戶(hù)：xzt

《3D Engine Design》的隨書(shū)源代碼