微小卫星星载处理器CAN接口设计与实现

针对现今两款流行的高性能ARM9芯片没有CAN资源,研制出基于AT91RM9200处理器的CAN接口.本文利用ARM芯片串行同步外设接口(SPI),选择带有标准SPI接口的CAN控制器,设计实现了CAN接口硬件电路,并完成CAN总线报文收发的软件设计与实现,最后在三种波特率下进行了测试,结果表明利用SPI接口扩展的CAN接口功耗低,工作稳定可靠,可满足微小卫星工作需求.     

基于SEP3203嵌入式微处理器的CAN总线接口设计及应用

从CAN总线的工作原理出发,简要分析CAN接口控制器MCP2515和嵌入式处理器SEP3203,通过具体项目的应用重点介绍基于该处理器的CAN总线的软、硬件接口设计及其应用.该设计在现场应用环境中得到了验证.     

一种基于LPC2368的CAN/TCP-IP嵌入式网关的设计

以集成了以太网控制器和CAN总线控制器的ARM7处理器LPC2368为核心,重点阐述了μClinux环境下CAN/TCP-IP异构协议的软件解决方法.提出CAN总线、以太网接口、以及电源部分设计,实现了低成本,高可靠性嵌入式网关的设计.     

基于ARM处理器的CAN-Ethernet通信模块实现

介绍了一种基于ARM处理器的CAN总线-以太网双向通信模块的实现方案,给出了ARM处理器S3C44B0x与CAN总线通信芯片SJA1000T、以太网通信芯片RTL8019as的硬件接口方法及CAN总线到以太网的双向通信软件实现方法.     

LPC2131基于CPLD的CAN接口设计

引言 Philips公司的LPC2131是基于ARM7TDMI—S的高性能32位RISC微控制器。它具有ARM处理器的所有优点——低功耗、高性能和较为丰富的片上资源,但LPC2131内部没有集成CAN控制器,而无法利用CAN总线来进行通信。为了使得LPC2131能够利用CAN总线进行通信,可以通过外部扩展来实现其功能。目前,比较普通的方法是在LPC2131的外部采用CAN控制器设计CAN总线接口。LPC2131与CAN控制器的接口电路如图1所示。     

双CAN总线接口在ARM上的实现

基于高级精简指令微处理器（ARM）技术的处理器已经普遍应用于工业控制、汽车电子等各个领域。区域网络控制器（CAN）总线也已广泛应用于这些领域,但大多数的ARM9系列芯片还没有在片内集成CAN总线的控制器,需要在板级进行扩展。选用SJAl000器件作为CAN总线控制器,详细论述了在ARM系统中进行双CAN总线接口扩展的实现方法。     

基于ARM的智能CAN总线模块设计

在工业控制环境下,计算机中经常需要提供CAN总线接口,基于CPCI总线的智能CAN模块用于扩展(ComapctPCI计算机系统的CAN总线接口;该模块通过CPCI总线与主机通讯,通过CAN总线与外界接口,在硬件设计上采用ARM控制器和双口RAM,在软件设计上采用环行缓冲设计,提高了模块数据传输的稳定性,大大降低传输过程中数据丢失的几率;在模块设计完成后,在相同的软硬件环境下对该模块和非智能的CAN总线模块进行对比测试,非智能CAN模块的总线传输速率波动是智能模块的一倍;该模块已经在产品应用,性能稳定且效果良好.     

基于ARM WinCE平台CAN同步异步驱动电机的设计与实现

针对移动焊接机器人控制系统对可靠性、实时性、稳定性、高效性的要求,提出了基于CAN总线的控制系统方案;首先论述了基于ARMv7架构的,CPU为TIAM3517的Cortex-A8嵌入式平台上的CAN总线设备的硬件接口设计,介绍了CAN/RS232转换控制器UIM2501和步进电机驱动控制器UIM242;接着详细论述了ARM WinCE平台上CAN驱动程序开发的设计方法与具体实现;硬件平台结构简单,经反复实验结果证明,该系统高效、稳定、可靠,可用于移动焊接机器入驱动系统.     

基于SEP3203处理器的LCD转VGA接口设计

SEP3203是东南大学自主研发的基于ARM7TDMI内核的一款微处理器.该处理器内置了LCD控制器,在与VGA接口的模块连接时需要对其进行转换.同时该处理器内部没有I2C总线控制器,在需要使用I2C总线进行通讯时要用GPIO口对其进行模拟.本文将介绍基于SEP3203处理器的LCD转VGA接口的硬件设计框架,以及用GPIO口模拟I2C总线的软件设计.     

CAN总线与以太网互连系统

为了实现以太网与CAN总线的数据交换,构建了一个基于嵌入式的CAN总线与以太网互连系统.系统硬件平台以LPC2119 ARM7为核心,包括由ENC28J60构成的以太网接口模块、CAN接口模块、HMI接口模块;系统软件平台使用了实时操作系统μ C/OS-Ⅱ和嵌入了LwIP协议栈,并用VC++设计了上位机人机界面.实验调...     

Assessing Ideational and Evaluative Skills and Creative Styles and Attitudes

This article describes the rationale for the multiphase creative problem solving process, and reports the findings from an empirical investigation conducted to facilitate the problem solving of managers. The ideational skills of the managers were assessed before and after training in a complete process of creative problem solving, along with their ideational attitudes, creative problem solving style (i.e., generator, conceptualizer, optimizer, or implementor), and evaluative skill (i.e., ability to recognize original ideas). The most important findings indicated that the training had a significant impact on the evaluative accuracy of the managers. They were significantly more accurate in their judgments about original ideas after training, both in their identification of original ideas and their recognition of unoriginal ideas. After training, the managers also gave more solutions and more original solutions to problems. Finally, several variables (e.g., the “preference for active divergence” attitude, and the conceptualizer process style) seemed to moderate the impact of training. Training was therefore effective, with specific effects that can be predicted from pre-training individual differences in attitudes and process style.     

Rank and select revisited and extended

The deep connection between the Burrows–Wheeler transform (BWT) and the so-called rank and select data structures for symbol sequences is the basis of most successful approaches to compressed text indexing. Rank of a symbol at a given position equals the number of times the symbol appears in the corresponding prefix of the sequence. Select is the inverse, retrieving the positions of the symbol occurrences. It has been shown that improvements to rank/select algorithms, in combination with the BWT, turn into improved compressed text indexes.     

高等院校行政分析与决策系统的设计与实现

为提高高等院校的管理水平和决策水平,充分利用校园网资 源,开发了高等院校行政财政分析与决策系统。解决了诸如数据的动态查询、自动生成报表 、网络环境下数据共享等技术问题,具有网上数据共享、图形界面友好和安全的保密措施等 特点。     

Stochastic balancing and approximation-stability and minimality

A new method of stochastic model reduction has recently been introduced by Desai et al. [1], [2]. The stability of the reduced order model has not previously, been considered. In this paper, we show that the stability of the reduced order model follows directly from the results of Pernebo and Silverman [3]. It is also shown that the reduced order model is minimal, in the controllability/observability sense. The relevance of this notion of minimality to stochastic minimality is made clear.