工業領域串口通信速度慢是個比較突出的問題， 而 F T 2 4 5 B M 能夠進行 US B和并行 I ／ O口之間的 協議轉換， 在一些條件下能夠取代串口． 介紹 F T 2 4 5 B M 芯片的工作原理和功能， 并給出基于 F T2 4 5 B M 的 US B接口電路的應用設計和基于 8 9 c 5 2的匯編及 c 5 1 單片機源程序．
上傳時間： 2017-05-27
上傳用戶：kytqcool
5800C Fm芯片資料和驅動代碼 技術特點： *國內首顆采用CMOS工藝的調頻收音機芯片； *驅動能力強，可直接驅動耳機及放大器； *功耗低，比國外先進方案還低1mA； *頻率覆蓋從76M-108M的各國調頻波段； *高度集成度，所需外圍器件數為零； *強大的LOW-IF數字音頻結構； *強大的數字信號處理技術（DSP）,實現自動頻率控制和自動增益控制； *數字自適應噪聲抑制 接受靈敏度高、音質出色、立體聲效果優異； *支持重低音，可調式電臺搜尋、柔軟靜音和混音等功能； *只需一個32.768K晶振作為參考時鐘； *支持I2C和SPI數字接口，支持I2S音頻接口，可以配合所有多媒體處理芯片； *可調去加重（50／75 us) ； *模擬和數字音量控制； *線性模擬輸出電壓； *兩線和三線控制接口模式； *封裝面積： 4×4mm，24-pin QFN
上傳時間： 2017-06-21
上傳用戶：1101055045
This control is another extension to the now standard and widely used ListView control. I have included some of the more common features: shaded columns, column sorting (with data type), but the real addition is the FILTERBAR features of the header. This implementation eliminates all of the work of dealing with the filter messages and item filtering by incorporating it into the control. This could have been implemented as delegates, but we create controls to do the work for us, don t we? I would like to thank Carlos H. Perez since a lot of the implementation came from examples he set with his ListViewEx control.
標簽： control extension ListView standard
上傳時間： 2013-12-05
上傳用戶：royzhangsz
ieee754的標準，原英文版的！Twenty years ago anarchy threatened floating-point arithmetic. Over a dozen commercially significant arithmetics boasted diverse wordsizes, precisions, rounding procedures and over/underflow behaviors, and more were in the works. “Portable” software intended to reconcile that numerical diversity had become unbearably costly to develop. Thirteen years ago, when IEEE 754 became official, major microprocessor manufacturers had already adopted it despite the challenge it posed to implementors. With unprecedented altruism, hardware designers had risen to its challenge in the belief that they would ease and encourage a vast burgeoning of numerical software. They did succeed to a considerable extent. Anyway, rounding anomalies that preoccupied all of us in the 1970s afflict only CRAY X-MPs — J90s now.
上傳時間： 2017-07-28
上傳用戶：894898248
This article discusses some issues that a typical Windows C++ programmer will encounter when approaching Symbian OS for the first time. Our experience in developing for three successive versions of Symbian OS has given us considerable perspective on what can be difficult when working in this otherwise rich and stable environment. While one reason for Symbian s success may be the desire of many mobile phone manufacturers not to be tied to Microsoft, the other reason is that Symbian has put together a lightweight, elegant system that succeeds in providing a very impressive range of functionality. Here are some pointers to help ease the transition to successful Symbian OS application development.
標簽： programmer discusses encounter article
上傳時間： 2017-07-30
上傳用戶：zhaiyanzhong
The book then branches out into different approaches for incorporating Ajax, which include: The Prototype and script.aculo.us Javascript libraries, the Dojo and Rico libraries, and DWR Integrating Ajax into Java ServerPages (JSP) applications Using Ajax with Struts Integrating Ajax into Java ServerFaces (JSF) applications Using Google s GWT, which offers a pure Java approach to developing web applications: your client-side components are written in Java, and compiled into HTML and JavaScript
標簽： incorporating approaches The different
上傳時間： 2017-08-10
上傳用戶：ljt101007
一款基于PHP的網絡日記程序。WikyBlog支持：多用戶的 BLOG，每個用戶的BLOG都可用簡單的URL訪問，很像 del.icio.us 的用戶URL訪問方式，BLOG 的書寫語法與 Mediawiki 一致，支持 Tags 文章分類，便于查找相關文章，支持 AJAX
上傳時間： 2014-01-06
上傳用戶：SimonQQ
The software and hardware development fields evolved along separate paths through the end of the 20th century. We seem to have come full circle, however. The previously rigid hardware on which our programs run is softening in many ways. Embedded systems are largely responsible for this softening. These hidden computing systems drive the electronic products around us, including consumer products like digital cameras and personal digital assistants, office automation equipment like copy machines and printers, medical devices like heart monitors and ventilators, and automotive electronics like cruise controls and antilock brakes. Embedded systems force designers to work under incredibly tight time-tomarket, power consumption, size, performance, flexibility, and cost constraints. Many technologies introduced over the past two decades have sought to help satisfy these constraints. To understand these technologies, it is important to first distinguish the underlying embedded systems elements.
標簽： development the software hardware
上傳時間： 2017-08-15
上傳用戶：cjf0304
Computing and the way people use C for doing it keeps changing as years go by. So overwhelming has been the response to all the previous editions of “Let Us C” that I have now decided that each year I would come up with a new edition of it so that I can keep the readers abreast with the way C is being used at that point in time.
標簽： overwhelming Computing changing people
上傳時間： 2013-12-23
上傳用戶：epson850
Implementation of GPU (Graphics Processing Unit) that rendered triangle based models. Our goal was to generate complex models with a movable camera. We wanted to be able to render complex images that consisted of hundreds to thousands of triangles. We wanted to apply interpolated shading on the objects, so that they appeared more smooth and realisitc, and to have a camera that orbitted around the object, which allowed us to look arond the object with a stationary light source. We chose to do this in hardware, because our initial implementation using running software on the NIOS II processor was too slow. Implementing parallelism in hardware is also easier to do than in software, which allows for more efficiency. We used Professor Land s floating point hardware, which allowed us to do calculations efficiency, which is essential to graphics.
標簽： Implementation Processing Graphics rendered
上傳時間： 2014-11-22
上傳用戶：shawvi
