基于USB的通用A/D采集系统的设计与实现

以数据采集系统为例,提出了一个基于Freescale M68HC08系列含USB模块的MCU的系统设计方法,从应用角度介绍了具有11个输入端的12位A/D转换器TLC2543的结构与编程要点,探讨了TLC2543与MC68HC908JB8(以下简称JB8)的接口方法,用软件合成SPI操作,给出了接口电路与A/D采集程序设计实例,并简单介绍了JB8通过USB和PC通信的方法.     

一种基于USB2.0的BDM高速编程调试器的设计

BDM是一种正在被业界广泛使用的嵌入式MCU在线编程调试技术。通过对适用于Freescale HCS12系列MCU的开源编程调试工具进行分析,发现其存在不能与高频率目标芯片进行通信的局限,而且由于采用USB1.1协议与PC机通信,速度较慢。提出了采用USB2.0技术重新设计编程调试器硬件及底层驱动软件的方案,有效地的解决了频率瓶颈度与通信速问题,设计出一种新型高效的适用于Freescale HCS08/RS08/HCS12系列MCU的通用编程调试器(USBDM)。     

MC9S08QG8单片机的EEPROM虚拟技术

MC9S08QG8（以下简称QG8）是Freescale公司于2006年推出的一款HCS08系列MCU。HCS08系列MCU是HC08系列的升级,具有更高的总线频率和更低的工作电压。QG8总线频率可以达到10MHz,工作电压可以低至1．8V,尤其是QG系列MCU采用了新型的Flash存储器（HCS08系列MCU的典型型号为MC9S08GB／GT系列MCU,Flash编程擦除可使用2．7V电压,QG系列MCU工作在1．8V时即可以对Flash进行操作）。同时低功耗也是QG系列MCU的一大特点。通过降低主频,在总线频率为1MHz、供电电压2V、温度125℃的情况下正常工作,     

飞思卡尔看好智能移动设备领域的增长在智能本、电子书阅读器、智能手机和其他领域芯片的领导地位为飞思卡尔提供增长机遇

正为了满足家电及其他电器产品对于低功耗微控制器的不断增长的需求,飞思卡尔半导体公司又进一步扩大了其广受欢迎的低端8位HCS08微控制器(MCU)系列,推出高性能的MC9S08SV16/8、MC9S08FL16/8系列MCU。     

Mon08编程接口算法的改进及高速编程调试器的设计与实现

Mon08是飞思卡尔公司HC08系列MCU的一种编程调试接口.针对在编程时Mon08通信速度慢的问题,深入剖析了Mon08的内部通信机理,发现了Mon08通信速度慢的原因,提出了改进通信算法的解决方案.实验表明,新的通信算法可以提高编程速度达5倍以上.还给出了适用于HC08全系列一百多个型号的通用编程调试器硬件解决方案与编程框架.     

S12单片机BDM调试器使用技巧

全国大学生"飞思卡尔杯"智能汽车竞赛推荐使用Freescale公司的MC9S12系列单片机为主控芯片;有USB接口的TTBDM调试器是主要软件调试工具。TTBDM调试器通过USB接口与PC通信,BDM接口与目标CPU通信,实现嵌入式软件的在线调试。根据往届车模竞赛中参赛者遇到的一些问题和本中心在长期支持国内S12系列单片机用户中积累的经验,总结出BDM调试器的用法和注意事项,提供一些使用技巧,以求对参赛者和S12产品开发工程师有所帮助。     

基于8051软核的SOPC系统设计与实现

介绍了基于IP的可重用的SOC设计方法;选用MC8051IP核为核心控制器,自主开发了UARTIP核、I2CIP核、USBIP核,采用Wishbone片上总线架构,集成了一个MCU系统;同时设计了针对此MCU系统的微机调试软件和硬件调试器,并实现了MCU系统的FPGA验证和整个系统的功能验证。设计中采用了开发8051行为模型的方式,缩短了系统仿真的时间;而USBIP核设计则采用双缓冲区结构,方便了系统集成,提高了传输速度。     

基于MC68HC(9)08JB8芯片的USB产品--键盘设计

通过简单介绍MC68HC(9)08JB8 MCU芯片的基本结构和USB协议,系统地介绍了MC68HC(9)08JB8在USB产品——键盘设计中的应用。在传统键盘设计的基础上实现了即插即用的功能。     

Freescale HC08系列MCU集成开发系统的若干关键技术

目前,国内进行HC08系列MCU的嵌入式产品开发的工具主要依赖进口,价格昂贵,使用不便.因而,设计开发一套方便、成熟、稳定,功能较强的Freeseale HC08系列MCU集成开发系统就显得尤其必要.对软件架构的可重定性和可移植性设计是文中的亮点,通过对编程调试器的硬件层面的设计来增强其通用效果,精心设计下载程序代码以提高程序下载的速度,合理设计IDE的软件架构以使系统具有良好的可扩充性和可移植性,对C语言程序的调试方法也做了初步的研究.概括了上述技术的基本要点与实现方法,并对其中的一些难点进行了较深入的分析.该开发系统已投入部分高校的教学实验和企业研发活动中,运行的稳定性及效果较好.     

飞思卡尔推出新的S08系列微控制器产品

为了满足家电及其他电器产品对于低功耗微控制器不断增长的需求,飞思卡尔半导体公司又进一步扩大了其广受欢迎的低端8位HCS08微控制器（MCU）系列,推出高性能的MC9S08SV16／8、MC9S08FL16／8系列MCU。这些高度集成的微控制器产品采用84％HCS08中央处理单元（CPU）,能够利用小型封装、低管脚数的设计来提高器件的灵活性。     

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。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.