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自动检测80C51 串行通讯中的波特率
本文介绍一种在80C51 串行通讯应用中自动检测波特率的方法。按照经验,程序起动后
所接收到的第1 个字符用于测量波特率。
这种方法可以不用设定难于记忆的开关,还可以免去在有关应用中使用多种不同波特率的
烦恼。人们可以设想:一种可靠地实现自动波特检测的方法是可能的,它无须严格限制可被确
认的字符。问题是:在各种的条件下,如何可以在大量允许出现的字符中找出波特率的定时间
隔...
2008-11-11
Learning the bash Shell, 3rd Edition
The first thing users of the UNIX or Linux operating systems come face to face with is the shell. "Shell" is the UNIX term for a user interface to the system—something that lets you communicate with the computer via the keyboard and the display. Shells are just separate programs that encapsulate the system, and, as such, there are many to choose from.
Systems are usually set up with a "standard" shell that new users adopt without question. However, some of these standard shells are rather old and lack many features of the newer shells. This is a shame, because shells have a large bearing on your working environment. Since changing shells is as easy as changing hats, there is no reason not to change to the latest and greatest in shell technology.
Of the many shells to choose from, this book introduces the Bourne Again shell (bash for short), a modern general-purpose shell. Other useful modern shells are the Korn shell (ksh) and the "Tenex C shell" (tcsh); both are also the subjects of O'Reilly handbooks.
2008-11-09
Wince develop guide,即开发指导文件包
该文件开发指导包,包含了WINCE应用程序的开发指南,设备驱动(其中包含了针对串口的开发举例),体系结构的介绍,网络与通信,显示驱动。。。
2008-11-09
2006-2007 手机技术发展分析
06--07年手机市场竞争依然激烈。从各品牌策略、功能趋势、市场热点以及消费者需求来进行分析,则可以大致把握住市场脉搏,一方面可以为公司的相关策略制定提供一定的参考依据,另一方面,也可使设计人员拓展视野,在进行产品设计时,能拥有大局观和针对性更强。
2008-11-09
DSP 技术(电子书).chm 水木清华的论坛精华之一
从DSP入门,到DSP开发的选择,参考资料的目录,工具的选择和推介,丰富的开发经验的共享。。。看了你就知道了,什么叫精华。
2008-11-09
关于射频与数模PCB高级设计讲义
该文件是一份极其完整的PCB设计高级教程,能够让读者迅速提高自己的PCB设计水准,特别是针对射频以及数模混合类的设计,从电气学角度分析每个设计原理。
2008-11-08
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