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1.
DMA传输方式下高速数据采集的DLL实现   总被引:2,自引:0,他引:2  
数据采集设备与PC主机之间的高速数据传输有FIFO(先进后出)和DMA两种主要方式。为在Windows环境下实现基于DMA传输方式的高速数据采集,研究了一种DLL方法。首先介绍了DMA传输方式下高速数据采集的基本原理,接着在Windriver底层驱动平台上构造了一个高速数据采集DLL,包括用于数据采集控制和DMA控制器操作的多个函数模块,最后给出用户应用程序调用该DLL进行高速数据采集的详细方法。  相似文献   

2.
系统芯片中的高速IO设备一般需要直接存储访问(DMA)功能的支持,以减轻处理器的负担,提高系统性能和IO性能.考察了片上系统总线和DMA访问机制的特性,设计实现了一种基于AHB总线的高速存储访问机制,采用专门的接口支持以太网络接口与系统主存之间的数据传输.在总线接口的设计中提出了总线访问的优化策略,并给出了一种确定FIFO设计参数的分析方法.实验结果表明,该访问机制提高了数据传输速率,有效地支持系统芯片的网络应用.  相似文献   

3.
将数字图像数据实时传送到DSP系统中进行处理,可采用多种方法完成;为了保证数字图像数据采集和处理的实时性,提出一种利用FPGA和一定容量的SRAM的DMA实现方法,通过以状态机为核心的逻辑控制实现一种大容量的组合式的FIFO作为DMA与外部数据传输的通道,整个通道通过DSP的EMIF接口实现与DMA控制器无缝接口,提高了DSP与外部数据交换的速度,适用于DSP和FPGA为主要组成的视频实时图像处理系统,数据传输率可达35M×32bit/s,实现了实时传输整幅视频图像数据的目的,使得数字信号处理器及时处理图像数据不产生延迟,提高了系统的数据处理能力和响应能力。  相似文献   

4.
相晖  王学宝 《计算机工程》2010,36(10):245-247
介绍一种高性能串行通信芯片PEB20534的工作原理及其使用方法,从硬件角度解析其多级FIFO、DMA控制和中断系统,讨论软件设计中的链表结构初始化和中断处理过程,并给出具体设计流程。利用该技术开发的基于链表结构的同步串行通信板具有工作稳定、数据传输可靠、工作模式随意配置等优点。  相似文献   

5.
研究了基于FPGA的同步FIFO和移位寄存器,利用同步FIFO作为大幅面高速彩色喷绘机喷头与上位机之间数据传输以及接口数据传输的缓存模块。该设计在保证数据传输实时性的前提下,解决了喷头和上位机像素数据格式方向不一致的问题,并消除了部分数据冗余。  相似文献   

6.
设计了一款带自动波特率检测且误差较小的UART模块,旨在获得良好的通信功能。该模块支持全双工的串行数据传输和红外通信功能,且支持DMA模式以减少CPU的占用时间。UART的发送和接收通道各有一个FIFO模块。最后,利用Verilog语言的硬件实现方法在FPGA平台上进行了验证。  相似文献   

7.
为了实现FPGA与USB2.0之间稳定快速的数据传输,该设计利用USB2.0接口芯片CY7C68013的Slave FIFO模式,采用时分复用的方法设计了一种双向数据接口。在FPGA端,持续把从USB OUT FIFO读出的数据回写到USB IN FIFO,以实现系统的自环测试。该设计已被应用到超宽带(UWB)无线系统中,结果表明本接口工作稳定,数据传输准确,平均速率12Mb/s。  相似文献   

8.
基于DDC和DSP的软件无线电中频信号处理方案。详细阐述了利用FIFO实现的DDC与DSP间数据传输的电路结构;分析了数据传输方式,FIFO数据的读写时序以及DSP EMIF的具体设置;根据硬件结构特点提出了设计中需要注意的问题。  相似文献   

9.
用双FIFO实现数据的高速并行读写   总被引:1,自引:0,他引:1  
用两个FIFO(先进先出双端口存储器)组成乒乓缓冲队列作数据流管道,以实现数据的高速并行读写。数据的传输均采用DMA控制,接口为中小规模组合电路。在关系数据库机的研究中成功地应用了这种管道技术。  相似文献   

10.
《微型机与应用》2018,(4):131-135
基于Xilinx Virtex-6系列FPGA设计实现了PCIE总线的DMA控制器,用来解决PC与FPGA的高速数据传输问题。利用DMA控制器传输数据在提高数据传输速率的同时还可大大提高CPU利用率。对设计的DMA控制器进行了功能和性能验证,结果表明该控制器能够正确地进行DMA数据传输,速率高达6 Gb/s。  相似文献   

11.
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.  相似文献   

13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。  相似文献   

14.
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.  相似文献   

15.
This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.  相似文献   

16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008  相似文献   

17.
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.  相似文献   

18.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

19.
《计算机科学》2007,34(4):148-148
Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.  相似文献   

20.
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.  相似文献   

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