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針對(duì)目前使用的RS232接口數(shù)字化B超鍵盤存在PC主機(jī)啟動(dòng)時(shí)不能設(shè)置BIOS，提出一種PS2鍵盤的設(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，不需要專門設(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
鍵盤設(shè)計(jì)
上傳時(shí)間：
2013-10-10
上傳用戶：asdfasdfd
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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(shí)間：
2015-09-24
上傳用戶：mpquest
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Distributed Median,Alice has an array A, and Bob has an array B. All elements in A and B are distinct. Alice and Bob are interested in finding the median element of their combined arrays.
標(biāo)簽：
array
B.
Distributed
has
上傳時(shí)間：
2013-12-25
上傳用戶：洛木卓
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design LP,HP,B S digital Butterworth and Chebyshev
filter. All array has been specified internally,so user only need to
input f1,f2,f3,f4,fs(in hz), alpha1,alpha2(in db) and iband (to specify
the type of to design). This program output hk(z)=bk(z)/ak(z),k=1,2,...,
ksection and the freq.
標(biāo)簽：
Butterworth
internally
Chebyshev
specified
上傳時(shí)間：
2015-11-08
上傳用戶：253189838
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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(shí)間：
2013-12-11
上傳用戶：LouieWu
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杭電 ACM 1002
I have a very simple problem for you. Given two integers A and B, your job is to calculate the Sum of A + B.
標(biāo)簽：
integers
problem
calcul
simple
上傳時(shí)間：
2014-01-12
上傳用戶：dave520l
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Problem B:Longest Ordered Subsequence
A numeric sequence of ai is ordered if a1 < a2 < ... < aN. Let the subsequence of the given numeric sequence (a1, a2, ..., aN) be any sequence (ai1, ai2, ..., aiK), where 1 <= i1 < i2 < ... < iK <= N. For example, sequence (1, 7, 3, 5, 9, 4, 8) has ordered subsequences, e. g., (1, 7), (3, 4, 8) and many others. All longest ordered subsequences are of length 4, e. g., (1, 3, 5, 8).
標(biāo)簽：
Subsequence
sequence
Problem
Longest
上傳時(shí)間：
2016-12-08
上傳用戶：busterman
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數(shù)值分析高斯——列主元消去法主程序
說(shuō)明如下：
％ a----input,matrix of coefficient
％ b----input,right vector
％ sol----output,returns the solution of linear equation
標(biāo)簽：
input
coefficient
matrix
vector
上傳時(shí)間：
2017-01-01
上傳用戶：dancnc
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basic.c */
/**//* Project:NeuroBasic, basic package*//**/
/* Survey:This is a simple Basic b-code compiler which*/
/*can be used as a comfortable command shell for */
/* any program. The actual compiler is found in */
/*compiler.c.*/
/*The functions m_fctptr() and user_server()*/
/*build an interface to an
標(biāo)簽：
basic
NeuroBasic
Project
package
上傳時(shí)間：
2017-02-15
上傳用戶：xymbian
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To use this function just define a variable say var,
var = pnseq(a, b, c)
for a, b and c refer to the zip file
標(biāo)簽：
var
function
variable
define
上傳時(shí)間：
2014-01-06
上傳用戶：zhuoying119
