TMS320C6678中的高速串行接口RapidIO研究

本文从嵌入式多核处理器之间高速数据通信的应用出发,结合对TI的TMS320C6678多核DSP的认识,开展了对RapidIO(SRIO)接口协议和TMS320C6678 SRIO模块结构的研究.并在此基础上,工程实现了TMS320C6678片间SRIO通信的详细配置过程,并对其通信性能进行了评测分析,为多核DSP系统级通信的设计提供了一定的参考.     

基于FPGA的DSP与ARINC429总线控制器接口设计

提出了一种基于FPGA的DSP与ARINC429总线控制器的接口设计方法和电路,该设计方法也适用于DSP与串口控制器、CAN控制器等接口的扩展设计。首先,分析了TMS320C6713 EMIF与HI-8582的主要信号与时序,表明通过FPGA实现译码逻辑和时序控制就可实现TMS320C6713与HI-8582之间的通信;接着,给出了详细的硬件设计和接口逻辑设计;然后,讨论了ARINC429总线驱动软件设计;最后,通过环境试验和实际应用验证了该接口电路工作稳定可靠。     

基于EMIF总线接口的桥芯片设计

EMIF是DSP（数字信号处理器）器件上的外部存储接口,基于TMS320VC5510电路的EMIF接口,提出了一种桥芯片的设计方法。该桥芯片包含了多个低速外设如I2C、UART以及SDIO接口,同时集成了IDO、ADC模拟IP,设计进行了充分的EDA仿真和FPGA验证,并进行了流片验证,实装测试结果表明EMIF接口可与桥芯片通信无误,实现了TMS320VC5510电路的外设扩展功能。该桥芯片的设计方法大大增加了市场上SoC设计的灵活度,有效地降低了设计周期,节约了设计成本。     

基于多DSP的红外目标跟踪系统设计与实现

提出了一种新的基于多片TMS320C6414DSP的EMIF与HPI接口互联并与McBSP接口互联构成松耦合级联的多DSP并行流水处理平台。通过与大规模的可编程逻辑器件FPGA的配合使用,设计实现了一套具有高实时性、良好的扩展性和多扩展接口等特点的多DSP实时红外目标跟踪系统。     

基于FPGA和EMIFA的SPI控制器系统设计

为了在现有C6000系列DSP芯片上扩展多路SPI外围设备,提出了一种基于FPGA和EMIF接口的多路SPI控制器系统方案。该方案采用C6000系列DSP上的EMIF接口与FPGA进行数据交互,扩展出多路SPI控制器。在FPGA上实现了接口模块、寄存器读写模块以及多路通用SPI模块。在ModelSim环境下对所设计的SPI控制器进行了仿真实验,仿真结果表明SPI控制器可以进行全双工通信。随之,在DSP-FPGA集成计算机上进行了实物测试,扩展的SPI控制器外接具有SPI接口的CAN控制器芯片MCP2515,通过扩展的SPI控制器控制MCP2515的数据收发,测试结果显示DSP可以通过MCP2515与其它CAN设备进行通信,扩展的SPI控制器工作正常。     

一种基于TMS320C6678多核处理器的JPEG实时解码优化算法

针对电子信息系统应用中数字视频的实时处理要求,在解析JPEG解码原理的基础上,针对多核DSP的系统架构,提出了多核DSP任务并行设计方法,设计了基于TMS320C6678的JPEG解码系统,实现了解码任务并行流水和核间高效通信。实验结果表明,基于TMS320C6678的JPEG解码系统的实时处理能力有很大提升,在电子信息系统数字视频传输与处理领域有广泛应用前景。     

基于SDRAM的DSP片外高速海量存储系统设计

介绍了使用同步动态RAM(SDRAM)扩展(TMS320C6201DSP系统外部存储空间的设计方法,讨论了C6201的EMIF(Extermal Memory Interface)与SDRAM的硬件接口实现并给出配置程序。而且详细介绍了基于IS42SI6400SDRAM芯片的某数字信号处理系统DSP片外高速大容量同步存储系统的具体实现方案。     

多核并行DSP光场偏振图像快速处理技术

提出了一种基于光场的偏振图像快速提取及实时处理方法。以多核DSP TMS320C6678为核心处理器,实现了从光场图像的采集到偏振图像的提取以及处理等一系列连续过程。对系统硬件以及软件设计进行了详细介绍。系统采用DSP+FPGA的方式,其中FPGA模块实现cameralink相机接口以及图像采集,DSP模块实现图像的快速处理算法。光场图像采集、偏振图像提取及偏振信息反演及融合算法和软件的优化是保证系统高效工作的关键部分,并且进行了重点讨论,提出了相应的解决方案。实验结果表明,系统实现了多核DSP并行运算处理,比单核DSP运算速度提高4倍左右。     

一种FPGA和TMS320DM642的通信方案

为了实现FPGA与TMS320DM642之间数据准确、高效、可靠的传输,给出FPGA的FIFO与TMS320DM642中EMIF(外部存储器接口)模块进行数据通信的一种设计方案。介绍EMIF与FIFO的结构特点,以及它们之间的硬件连接方式和软件实现方法。实验表明,该通信方案不但实现了数据的可靠、快速传输,而且具有结构灵活、调试方便等特点。     

TMS320VC5509在线烧写Flash并自举启动方法研究

为了解决TMS320VC55X系列DSP系统程序代码的保存问题,设计了一种利用JTAG接口,在线烧写Flash并实现自举启动的方法。这种在线编程的方法利用并行外部存储器加载(EMIF)接口将TMS320VC5509和Flash芯片相连接,通过搬移程序将应用程序的已初始化段按照C55X系列DSP引导表格式烧写进外部扩展的Flash存储器中,从而实现自举启动。该方法为DSP系统的软件维护和升级带来了方便,具有实际的应用价值。     

Only connect: teaching, technology and telesis

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.     

European Community policy and the market

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.     

一种自适应子融合集成多分类器方法

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。     

Avoiding semantic and temporal gaps in developing software intensive systems

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.     

Designing economic np control charts: A programmed simulation approach

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.     

The development of robot art

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     

煤矿井下安全监控分站的设计及其仿真实现

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.     

Explanation and prediction: an architecture for default and abductive reasoning

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.     

Three Process Perspectives: Organizations, Teams, and People

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.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。