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針對目前使用的RS232接口數(shù)字化B超鍵盤存在PC主機(jī)啟動時不能設(shè)置BIOS，提出一種PS2鍵盤的設(shè)計方法。基于W78E052D單片機(jī)，采用8通道串行A/D轉(zhuǎn)換器設(shè)計了8個TGC電位器信息采集電路，電位器位置信息以鍵盤掃描碼序列形式發(fā)送，正交編碼器信號通過XC9536XL轉(zhuǎn)換為單片機(jī)可接收的中斷信號，軟件接收到中斷信息后等效處理成按鍵。結(jié)果表明，在滿足開機(jī)可設(shè)置BIOS同時，又可實現(xiàn)超聲特有功能，不需要專門設(shè)計驅(qū)動程序，接口簡單，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
鍵盤設(shè)計
上傳時間：
2013-10-10
上傳用戶：asdfasdfd
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排序算法、字典和B-樹的C++語言實現(xiàn)
代碼內(nèi)容 包括以下算法：
qui.c sort: quicksort
qsort.c sort: qsort
ins.c sort: insert sort
shl.c sort: shell sort
has.c dictionary: hash tables
bin.c dictionary: binary tree
rbt.c dictionary: red-black trees
skl.c dictionary: skip lists
ext.c external sort
btr.c btree
語言 C++
編譯平臺 Visual C++
作者 Thomas Niemann
備注 來自Sorting and Searching Algorithms:A Cookbook
標(biāo)簽：
sort
qsort
quicksort
insert
上傳時間：
2013-12-15
上傳用戶：silenthink
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See Appendix B for a description of the programs included
on this companion disk. RESOURCE.WRI identifies other books
and resources for Internet programming. WEBHELP.HLP contains
an introduction to the World Wide Web. TCPMAN.HLP provides
detailed instructions to help you use the Trumpet Winsock
included on this disk. Use the Program Manager s File menu
Run option to execute the SETUP.EXE program found on this
disk. SETUP.EXE will install the programs on your hard drive
and create an Internet Programming group window.
Internet編程技術(shù) [配套程序]
[涉及平臺] VC
[作者] void
[文件大小] 1032K
標(biāo)簽：
description
companion
Appendix
RESOURCE
上傳時間：
2013-12-04
上傳用戶：asasasas
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Windows下讀寫硬件的工具.
RW - Read & Write utility, for hardware engineers, firmware (BIOS) engineers, driver developers, QA engineers, performance test engineers, diagnostic engineers, etc., This utility access almost all the computer hardware, including PCI (PCI Express), PCI Index/Data, Memory, Memory Index/Data, I/O Space, I/O Index/Data, Super I/O, Clock Generator, DIMM SPD, SMBus Device, CPU MSR Registers, ATA/ATAPI Identify Data, ACPI Tables Dump (include AML decode), Embedded Controller, USB Information and LPT Remote Access. And also an Command Window is provided to access hardware manually.
標(biāo)簽：
engineers
firmware
hardware
Windows
上傳時間：
2015-07-01
上傳用戶：xc216
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RW - Read & Write utility, for hardware engineers, firmware (BIOS) engineers, driver developers, QA engineers, performance test engineers, diagnostic engineers, etc., This utility access almost all the computer hardware, including PCI (PCI Express), PCI Index/Data, Memory, Memory Index/Data, I/O Space, I/O Index/Data, Super I/O, Clock Generator, DIMM SPD, SMBus Device, CPU MSR Registers, ATA/ATAPI Identify Data, ACPI Tables Dump (include AML decode), Embedded Controller, USB Information and LPT Remote Access. And also an Command Window is provided to access hardware manually.
Website1: http://rw.net-forces.com/
Website2: http://home.kimo.com.tw/ckimchan.tw/
Website3: http://jacky5488.myweb.hinet.net/
For best view, please change the screen resolution to 1024 x 768 (or above) pixels.
標(biāo)簽：
engineers
developers
firmware
hardware
上傳時間：
2013-12-22
上傳用戶：王楚楚
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contain many examples code for I2c,UART,string ,digital convert, read/write to EEprom in microchip PIC16xx series. and the default compiler is hitech PIC16.
標(biāo)簽：
microchip
examples
contain
digital
上傳時間：
2014-01-04
上傳用戶：xmsmh
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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
上傳時間：
2013-12-25
上傳用戶：semi1981
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* "Copyright (c) 2006 Robert B. Reese ("AUTHOR")"
* All rights reserved.
* (R. Reese, reese@ece.msstate.edu, Mississippi State University)
* IN NO EVENT SHALL THE "AUTHOR" BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE "AUTHOR"
* HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
標(biāo)簽：
Reese
B.
R.
Copyright
上傳時間：
2015-09-24
上傳用戶：mpquest
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Verilog HDL: Magnitude
For a vector (a,b), the magnitude representation is the following:
A common approach to implementing these arithmetic functions is to use the Coordinate Rotation Digital Computer (CORDIC) algorithm. The CORDIC algorithm calculates the trigonometric functions of sine, cosine, magnitude, and phase using an iterative process. It is made up of a series of micro-rotations of the vector by a set of predetermined constants, which are powers of two. Using binary arithmetic, this algorithm essentially replaces multipliers with shift and add operations. In a Stratix™ device, it is possible to calculate some of these arithmetic functions directly, without having to implement the CORDIC algorithm.
標(biāo)簽：
representation
Magnitude
the
magnitude
上傳時間：
2013-12-24
上傳用戶：金宜
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About:
hamsterdb is a database engine written in ANSI C. It supports a B+Tree index structure, uses memory mapped I/O (if available), supports cursors, and can create in-memory databases.
Release focus: Major feature enhancements
Changes:
This release comes with many changes and new features. It can manage multiple databases in one file. A new flag (HAM_LOCK_EXCLUSIVE) places an exclusive lock on the file. hamsterdb was ported to Windows CE, and the Solution file for Visual Studio 2005 now supports builds for x64. Several minor bugs were fixed, performance was improved, and small API changes occurred. Pre-built libraries for Windows (32-bit and 64-bit) are available for download.
Author:
cruppstahl
標(biāo)簽：
C.
hamsterdb
structure
database
上傳時間：
2013-12-11
上傳用戶：LouieWu
