随着USB技术日趋成熟，USB开发者只需要关注顶层开发即可，这样虽然减少了工作量，但容易使开发者忽略USB基础理论与概念，导致的弊端在于开发者一旦遇到问题，往往不知如何解决。作者基于多年USB开发经验，针对当前很多USB开发者容易混淆的概念，进行深入浅出的剖析，针对枚举和重枚举的区别、不同启动方式的区别等问题，进行了归纳总结。本文从对比的角度分析问题，有助于开发者理清USB的工作机理。
标签： USB
上传时间： 2013-10-26
上传用户：zaocan888
介绍几种cpuThe 8xC251SA/SB/SP/SQ improves on the MCS-51 architecture and peripheral features, introducing the advanced register based CPU architecture i.e., the MCS 251 microcontroller architecture. The register based CPU supports a 40-byte register file. In addition, the 8xC251SA/SB/SP/SQ microcontroller has 256-Kbyte expanded external code/data memory space and 64-Kbyte stack space. The new controller is also specially designed to execute C code efficiently. More importantly, the 8xC251SA/SB/SP/SQ maintains binary code compatibility with MCS 51 microcontrollers but at the same time allows the use of the powerful MCS 251 microcontroller instruction set, with many new 8, 16 and 32 bit instructions available. The 8xC251SA/SB/SP/SQ has 512 bytes or 1 Kbyte of on-chip data RAM options and is available in 16 Kbytes and 8 Kbytes of on-chip ROM/OTPROM or ROMless options.
标签： architecture introducin peripheral improves
上传时间： 2015-03-15
上传用户：ccclll
This scheme is initiated by Ziv and Lempel [1]. A slightly modified version is described by Storer and Szymanski [2]. An implementation using a binary tree is proposed by Bell [3]. The algorithm is quite simple: Keep a ring buffer, which initially contains "space" characters only. Read several letters from the file to the buffer. Then search the buffer for the longest string that matches the letters just read, and send its length and position in the buffer.
标签： initiated described modified slightly
上传时间： 2014-01-09
上传用户：sk5201314
Altera recommends the following system configuration: * Pentium II 400 with 512-MB system memory (faster systems give better software performance) * SVGA monitor * CD-ROM drive * One or more of the following I/O ports: - USB port (if using Windows XP or Windows 2000) for USB-Blaster(TM) or MasterBlaster(TM) communications cables, or APU programming unit - Parallel port for ByteBlasterMV(TM) or ByteBlaster(TM) II download cables - Serial port for MasterBlaster communications cable * TCP/IP networking protocol installed * Windows 2000, Windows NT 4.0 with Service Pack 3 or later, or Windows XP * Internet Explorer 5.0 or later Memory & Disk Space Requirements USB开发
标签： system configuration recommends following
上传时间： 2015-03-27
上传用户：13188549192
TOYFDTD1 is a stripped-down minimalist, 3D FDTD code demonstrating the basic tasks in implementing a simple 3D FDTD simulation. An idealized rectangular waveguide is modeled by treating the interior of the mesh as free space and enforcing PEC conditions on the faces of the mesh. A simplified plane wave source is inserted at one end. First released 12 April 1999. Version 1.03 released 2 December 1999.
标签： demonstrating stripped-down implementing minimalist
上传时间： 2013-12-21
上传用户：无聊来刷下
* A ncurses user interface. * Network statistics to view the amount of packets and data in many different protocols, interfaces and hosts. * View what active TCP connections are on the network. * View UDP packets. * View and log ICMP packets. * View and log the 48bit arp protocol. And also view what make of network card is in each machine * Multithreaded so that the user interface does not interfere with any of the packet captureing methods. * View and log the following user space protocols FTP, POP3, HTTP
标签： statistics interface ncurses Network
上传时间： 2015-04-20
上传用户：bjgaofei
This companion disc contains the source code for the sample programs presented in INSIDE VISUAL C++ 5.0, as well as pre- compiled copies of the programs. To copy all of the sample code onto your hard disk, run the SETUP.EXE program and follow the instructions that appear on the screen. The sample code requires about 10 MB of hard disk space.
标签： companion the presented contains
上传时间： 2015-05-09
上传用户：mhp0114
简单混合衰落信道 This mfile inputs an unmodulated sinewave through a simple Rayleigh two path fading channel and shows the output with phase, gain, and attenuation characteristics via animation.
标签： unmodulated Rayleigh sinewave through
上传时间： 2015-05-17
上传用户：CSUSheep
C++ Demystified: A Self-Teaching Guide by Jeff Kent ISBN:0072253703 McGraw-Hill/Osborne © 2004 This hands-on, step-by-step resource will guide you through each phase of C++ programming, providing you with the foundation to discover how computer programs and programming languages work.
标签： Self-Teaching Demystified McGraw-Hill 0072253703
上传时间： 2013-12-13
上传用户：1427796291
遗传算法(Genetic Algorithm, GA)是近几年发展起来的一种崭新的全局优化算法，它借 用了生物遗传学的观点，通过自然选择、遗传、变异等作用机制，实现各个个体的适应性 的提高。这一点体现了自然界中"物竞天择、适者生存"进化过程。1962年Holland教授首次 提出了GA算法的思想，从而吸引了大批的研究者，迅速推广到优化、搜索、机器学习等方 面，并奠定了坚实的理论基础。 用遗传算法解决问题时，首先要对待解决问题的模型结构 和参数进行编码，一般用字符串表示，这个过程就将问题符号化、离散化了。也有在连续 空间定义的GA(Genetic Algorithm in Continuous Space, GACS)，暂不讨论。
上传时间： 2015-06-08
上传用户：stampede
