第八章 labview的编程技巧 本章介绍局部变量、全局变量、属性节点和其他一些有助于提高编程技巧的问题,恰当地运用这些技巧可以提高程序的质量。 8.1 局部变量 严格的语法尽管可以保证程序语言的严密性,但有时它也会带来一些使用上的不便。在labview这样的数据流式的语言中,将变量严格地分为控制器(Control)和指示器(Indicator),前者只能向外流出数据,后者只能接受流入的数据,反过来不行。在一般的代码式语言中,情况不是这样的。例如我们有变量a、b和c,只要需要我们可以将a的值赋给b,将b的值赋给c等等。前面所介绍的labview内容中,只有移位积存器即可输入又可输出。另外,一个变量在程序中可能要在多处用到,在图形语言中势必带来过多连线,这也是一件烦人的事。还有其他需要,因此labview引入了局部变量。
上传时间: 2013-10-27
上传用户:xieguodong1234
When I started writing the first edition of RF Power Amplifiers for Wireless Communications,some time back in 1997, it seemed that I was roaming a largely uninhabitedlandscape. For reasons still not clear to me there were few, if any, otherbooks dedicated to the subject of RF power amplifiers. Right at the same time, however,hundreds of engineers were being assigned projects to design PAs for wirelesscommunications products. It was not, therefore, especially difficult to be successfulwith a book that was fortuitously at the right place and the right time.
标签: Communications Amplifiers Wireless Edition
上传时间: 2013-11-12
上传用户:YYRR
ExpressPCB 是一款免费的PCB设计软件,简单实使。可以画双层板。 Our Free PCB software is a snap to learn and use. For the first time, designing circuit boards is simple for the beginner and efficient for the professional. Our board manufacturing service makes top quality two and four layer PCBs. Use our MiniBoard service and pay only $51 for three boards (plus $8 shipping).
标签: ExpressPCB PCB 设计软件
上传时间: 2013-11-15
上传用户:lchjng
ExpressPCB 是一款免费的PCB设计软件,简单实使。可以画双层板。 Our Free PCB software is a snap to learn and use. For the first time, designing circuit boards is simple for the beginner and efficient for the professional. Our board manufacturing service makes top quality two and four layer PCBs. Use our MiniBoard service and pay only $51 for three boards (plus $8 shipping).
标签: ExpressPCB PCB 设计软件
上传时间: 2013-10-09
上传用户:1047385479
SOPC嵌入式系统实验教程(一)【作者:周立功;出版社:北京航空航天大学出版社】(因网上资料有限,所以本资料为周立功 SOPC嵌入式系统实验教程(一)部分章节及实验代码,真心想学的可以买一本书看看。) 该书是与《SOPC嵌入式系统基础教程》相配套的实验教材。设计开发了 45个实验,包括SOPC硬件系统的基础实验,基于Nios II外设的基础编程实验,基于实验箱外设的Nios II高级编程实验,在Nios II系统中进行基于μ C/OS-II操作系统的应用程序开发实验和SOPC硬件系统的高级实验。各种实验的安排由浅人深,由硬件到软件,相对完整,使读者很容易学习和掌握SO PC嵌入式系统的开发应用。
上传时间: 2013-11-01
上传用户:superman111
Introduction to Xilinx Packaging Electronic packages are interconnectable housings for semiconductor devices. The major functions of the electronic packages are to provide electrical interconnections between the IC and the board and to efficiently remove heat generated by the device. Feature sizes are constantly shrinking, resulting in increased number of transistors being packed into the device. Today's submicron technology is also enabling large-scale functional integration and system-on-a-chip solutions. In order to keep pace with these new advancements in silicon technologies, semiconductor packages have also evolved to provide improved device functionality and performance. Feature size at the device level is driving package feature sizes down to the design rules of the early transistors. To meet these demands, electronic packages must be flexible to address high pin counts, reduced pitch and form factor requirements. At the same time,packages must be reliable and cost effective.
上传时间: 2013-11-21
上传用户:不懂夜的黑
介绍了基于Matlab/RTW(Real-time Workshop)和RTX(Real-time extension)构建实时仿真系统的方法;针对基于RTX的实时仿真系统不能直接进行在线调参的不足,提出了一种利用C API(C文件应用程序接口)实现在线调参的方法。经过实验证明,此仿真系统不仅具有很强的实时性,并且拥有良好的人机交互能力;另外,在线调参功能的实现使仿真试验的效率得到了大大的提高,而且还可以作为一种故障注入方法来考察模型的容错能力,是基于RTX实时仿真系统的一大改良。
上传时间: 2014-03-20
上传用户:lizhizheng88
Ebase实时数据库系统(Ebase Real-time Database Management System,简称EBase实时数据库)是上海谷益科技有限公司推出的具有自主知识产权的实时数据库管理系统及套件产品。 实时数据库系统理论在新领域的扩展,在电力、钢铁、化工、造纸领域有着广阔的应用前景,可以为企业提供高速、实时数据服务,能够对快速变化的数据进行长期保存,是工厂控制层与生产管理系统之间连接桥梁,同时也是先进控制,在线优化、故障诊断的数据平台
上传时间: 2013-10-08
上传用户:muhongqing
为了移植到MPC860,需要修改uC/OS-II中与处理器和编译器相关的部分代码
上传时间: 2013-12-22
上传用户:wangzhen1990
提供了一些ADSP-217x或ADSP-218x DSP芯片的编程事例,运行在uC/OS-II平台下。
上传时间: 2015-03-13
上传用户:qwe1234