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
Bing is a point-to-point bandwidth measurement tool (hence the b ), based on ping. Bing determines the real (raw, as opposed to available or average) throughput on a link by measuring ICMP echo requests roundtrip times for different packet sizes for each end of the link
標(biāo)簽： Bing point-to-point measurement determines
上傳時(shí)間： 2015-09-15
上傳用戶：lgnf
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(shí)間： 2013-12-24
上傳用戶：金宜
采用3D Bresenham算法在兩點(diǎn)間劃一直線 ％ This program is ported to MATLAB from: ％ B.Pendleton. line3d - 3D Bresenham s (a 3D line drawing algorithm) ％ ftp://ftp.isc.org/pub/usenet/comp.sources.unix/volume26/line3d, 1992 ％ ％ Which is referenced by: ％ Fischer, J., A. del Rio (2004). A Fast Method for Applying Rigid ％ Transformations to Volume Data, WSCG2004 Conference. ％ http://wscg.zcu.cz/wscg2004/Papers_2004_Short/M19.pdf
標(biāo)簽： Bresenham Pendleton program MATLAB
上傳時(shí)間： 2013-12-10
上傳用戶：sz_hjbf
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：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：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：eeworm
專輯類-實(shí)用電子技術(shù)專輯-385冊(cè)-3.609G jk-b交通信號(hào)控制機(jī)原理圖-1.3M.zip
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：zhf1234
專輯類-電子基礎(chǔ)類專輯-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：pkkkkp
三次B樣條曲線源代碼,C語(yǔ)言編寫的三次B樣條曲線源代碼，希望大家喜歡。
標(biāo)簽：
上傳時(shí)間： 2013-07-13
上傳用戶：chengli008
蟲(chóng)蟲(chóng)下載站版權(quán)所有 京ICP備2021023401號(hào)-1
