ARM-Linux嵌入式系统BootLoader的配置与移植

嵌入式系统BootLoader的配置及移植是解决嵌入式系统的启动、初始化、操作系统内核的固化和引导等问题的关键.分析了ARM-Linux嵌入式系统的组成,介绍了BootLosder的概念及移植、修改需要注意的问题.并以S3C44B0处理器为例,实现了其在Linux系统下的配置与移植,通过引导程序BootLoader的装入,成功解决了嵌入式系统的启动、初始化、操作系统内核的固化和引导等问题.     

ARM-Linux嵌入式系统BootLoader的配置与移植

嵌入式系统BootLoader的配置及移植是解决嵌入式系统的启动、初始化、操作系统内核的固化和引导等问题的关键。分析了ARM-Linux嵌入式系统的组成,介绍了BootLoader的概念及移植、修改需要注意的问题。并以S3CA480处理器为例,实现了其在Linux系统下的配置与移植,通过引导程序BootLoader的装入,成功解决了嵌入式系统的启动、初始化、操作系统内核的固化和引导等问题。     

基于 AT91RM9200微控制器的B00tLoader的分析与开发

嵌入式系统开发过程中的一个重要问题是如何开发BootLoader。目前已有一些通用的BootLoader,但如何根据特定的嵌入式系统平台,开发相应的BootLoader,无疑是一个重点和难点。本文选用AT9IRM9200微控制器建立了一个通信接口平台,通过阐述U-Boot分析了BootLoader开发的特点和操作模式,并通过详细地分析AT91BasicBoot的源程序,具体地说明了BootLoader需要完成的主要任务和实现方法。可见,BotLoader是操作系统和硬件的枢纽,负责初始化硬件和引导操作系统的内核。     

基于S3C2410A和Linux的引导加载程序的实现

在当前数字信息技术和网络技术高速发展的后PC时代，嵌入式系统已经广泛地渗透到科学研究、工业控制、消费电子以及人们的日常生活等方方面面。引导加载程序-BootLoader是嵌入式CPU上电启动运行的第一个程序，是操作系统和硬件的枢纽，对后续软件的开发十分重要。本文以基于ARM920T内核的微处理器S3C2410A和嵌入式Linux操作系统为基础，介绍了嵌入式系统的引导装载程序BootLoader的实现方法，探讨了u—boot在S3C2410A处理器上的移植，并结合u—boot详细分析了BootLoader的启动过程。     

基于ARM的嵌入式Boot Loader浅析

在专用的嵌入式系统(如ARM)上运行GNU/Linux已经变得越来越流行,本文详细介绍了基于ARM的嵌入式BootLoader在嵌入式文件系统中所处的位置、作用、基本概念,从开发人员的角度比较了BootLoader两种操作模式之异同,最后分析了BootLoader的启动流程,以及在不同启动阶段CPU的合理设置等问题。     

一种基于S3C6410的BootLoader的设计与实现

引导加载程序(BootLoader)是嵌入式系统开发的关键技术之一,主要用于建立操作系统的运行环境。针对BootLoader严重依赖于硬件实现的问题,提出一种基于"NAND Flash+TFTP"存储下载方式的BootLoader设计方法,并采用OK6410开发板对该BootLoader进行实验验证。实验结果表明该BootLoader运行良好且稳定。该设计方法可以广泛地应用到嵌入式系统和其他的处理器中。     

ARM+DSP嵌入式系统BootLoader在LTE中的实现

选取基于ARM+DSP双核系统的C6A8168为硬件平台,根据TD-LTE系统中的设计要求,介绍了基于ARM+DSP的嵌入式双核系统从系统上电到双核完全启动的BootLoader设计和实现,包括从中断向量表的建立、主处理器启动到进入应用程序的整个过程,并重点阐述了基于ARM+DSP双核非对称架构与传统的单核处理器的BootLoader的异同。经验证,本BootLoader在实现ARM+DSP双核系统启动的同时满足了TD-LTE射频一致性系统的要求。     

基于Linux嵌入式系统的Boot Loader研究与实现

通过深圳亿道电子公司嵌入式产品Eeliod开发板,对BootLoader的启动过程和存储映射进行了研究,重点分析了Boot Loader的原理、程序架构,并最终实现了嵌入式开发板的引导.     

基于s3c2410开发板的Boot Loader的启动分析

BootLoader是操作系统和硬件的枢纽,负责初始化硬件和引导操作系统的内核,目前已有一些通用的BootLoader,但是如何根据特定的嵌入式平台,开发BootLoader是一个重点和难点。本文通过阐述VIVI分析了BootLoader开发的特点和模式,详细说明了BootLoader要完成的主要任务和实现方法。     

在内核下的BootLoader自动更新方法

目前的BootLoader更新方法仅适用于单块目标板的调试阶段,无法实现批量更新。为此,提出一种在内核下的BootLoader自动更新方法。该方法提取新BootLoader镜像文件中的有效数据,并将其保存到以“.h”结尾的文件中,利用特制的Flash驱动程序及该类型文件生成特制的内核,通过外部移动存储设备,将特制内核更新到嵌入式系统中,特制内核启动后将自动更新BootLoader,从而完成BootLoader的批量更新。     

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     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。