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单片机多路模拟串口的实现及其性能分析 总被引:1,自引:0,他引:1
针对在进行多串口通信时单片机串口不够用的问题,提出了一种单片机多路模拟串口的实现方法.介绍了标准的串行通信数据格式,分析了硬件串口的工作原理,以及软件扩展串口的数据发送和数据接收实现方法.通过实验分析证明了软件扩展多路串口的可行性、易用性及通用性,在基于GPRs的分水点流量远程监控终端的应用中取得了预期的效果. 相似文献
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介绍了一种QNX系统中基于AM3352的多串口通信驱动的设计方法.首先给出了利用FPGA扩展串口的设计电路,以此为基础实现了硬件的配置代码,接着阐述了QNX下串口驱动的工作原理,然后从串口初始化、接收数据、发送数据几个方面讲述了串口驱动的开发过程和方法. 相似文献
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目前ARM9处理器在嵌入式系统中得到了广泛应用,但是其通常只有3个及其以下的串口,对于需要多串口通信的系统难以满足要求;因此通过对基于ARM9处理器车载智能终端设计中遇到的多串口扩展问题进行了分析研究,提出了利用具有将单串口扩展为5串口功能的串口扩展芯片GM8125实现多串口扩展的方案,并在串口通讯中采用了分层设计的方法,提高了系统的稳定性和运行效率;并且利用GPS和GPRS模块实现与计算机多串口的通信,验证了方案的可行性。 相似文献
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单片机的多串口扩展技术的设计 总被引:11,自引:2,他引:9
针对大多数单片机都只有一个串口的局限,在多数情况下限制它们的应用。利用单片机串口扩展技术,以MCS51系列单片机8751为例进行串行接口扩展,包括扩展两个独立的串口、一点对多点分时串口、单片机与RS232/RS422/RS485的串行通信接口。实际应用证明,设计可靠,稳定性好。用多种方法进行串口扩展,解决了单片机在串行通信系统中的串口局限问题。 相似文献
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在分析串口扩展原理及现有串口扩展方法的基础上,提出了一种用单片机作为扩展模块主控部分,将嵌入式多参数监护仪的串口由1个扩展为4个的双向透明设计方案.经验证,该方案通信可靠,波特率满足系统要求,对串口扩展及其他接口设计均有一定的启迪作用和实际参考价值. 相似文献
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通过对串口技术的研究,提出了一种用软件实现串口扩展的方法,该方法仅使用2个普通I/O引脚和1个定时器,实现了带FIFO的高速全双工串口。该方法可以节约系统开发的硬件开销。文中给出了设计程序,在STC12C1052单片机上进行测试,其通信速率达到38400bps。 相似文献
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影响压电式传感器工作性能的主要因素 总被引:3,自引:0,他引:3
压电式传感器通常都需要接触测量,它的灵敏度、频响特性和重量,是衡量其工作性能的主要指标。分析讨论了影响其工作性能的主要因素。 相似文献
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Continuity as the mathematical tool in the creation of architectural forms is known as morphocontinuity. In the present work,
we explain how morphocontinuity appears on the work of Eero Saarinen and discuss its correspondence with its environmental
(physical, social and cultural) contexts. 相似文献
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This article reviews research work on set of experience knowledge structure (SOEKS)-decisional DNA (DDNA) done in the past, ongoing, and planned for the future. Firstly, the concept of the knowledge representation technique of SOEKS-DDNA is discussed, and then an attempt is made to organize the past research related with it in chronological order. This work focuses on the review on SOEKS-DDNA, its application in different domains, the various implementation platforms, as well as its benefits and its limitations. The second part of this article provides an idea of the SOEKS-DDNA-related research endeavors currently carried out by us and the last part is a sneak peek into our planned future work. 相似文献
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GIST(Geographic Information System Toolkit)是一个与数字图像处理系统结合起来的地理信息系统。作为中英合作进行的新疆试验区遥感地质找矿以及地理信息系统的发展应用项目的一个组成部分,作者与英国SWK公司的同事们一起,对该系统的基本结构以及将该系统应用于遥感地质方面,做了一系列的软件发展工作。文中将详述这些工作,包括系统构成及若干特点,具体的应用以及进一步发展GIST在地质方面应用的一些考虑。 相似文献
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Mapping the relationships between work and sustainability and the opportunities for ergonomic action
A map was drawn up of the relationships between work (in its multiple interpretations) and sustainability (sustainable development and corporate sustainability) based on a bibliographic analysis of articles that discuss these themes jointly in the current academic literature. The position of the discipline of ergonomics focused on work was identified from this map and, based on its specific academic literature, it was possible to identify where this discipline could contribute so that work and workers can be included in the discourse of sustainable development and considered in corporate sustainability policies. Ergonomics can be actively influential within the organization on issues relating to work improvements; it may boost integrated increases in the organization's performance and in workers' well-being; it can provide support for changes and new (environmental) sustainability-related work requirements to be considered; and it can contribute to the definition of the concept of work in a context of sustainable development. 相似文献
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Software professionals' work remains vital to modern industrial society as key definitions of work, the organization of work, and the relationship of modern software systems to society's evolution demonstrate. This article discusses why the question of what work to pursue is interesting with regard to the software field; it also explores the meaning of work itself and its relation to the individual, society, and the economy. 相似文献
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