基于S3C6410与FPGA通讯的SPI接口驱动设计

SPI总线系统是一种同步串行外设接口,能与外设以串行方式进行通信.介绍Windows CE6.0的SPI驱动程序结构及SPI中断处理过程,实现与FPGA通讯的SPI接口驱动设计.     

AT91RM9200的SPI设备驱动程序开发

SPI接口技术是一种高速,高效的串行接口技术,因而SPI设备在数据通信中应用十分方便。设备驱动程序作为操作系统内核和硬件之间的接口,是嵌入式开发的重要组成部分,针对微处理器AT91RM9200和嵌入式Linux操作系统构建的开发平台,分析了AT91RM9200与TLC2543硬件结构,并根据接口电路的连接特点说明了SPI设备驱动程序的基本开发方法和动态模块加载实现过程。     

AT91RM9200的SPI设备驱动程序开发

SPI接口技术是一种高速，高效的串行接口技术，因而SPI设备在数据通信冲应用十分方便。设备驱动程序作为操作系统内核和硬件之间的接口，是嵌入式开发的童要组成部分，针对微处理器AT91RM9200和嵌入式Linux操作系统构建的开发平台，分析了AT91RM9200与TLC2543硬件结构，并根据接口电路的连接特点说明了SPI设备驱动程序的基本开发方法和动态模块加载实现过程。     

基于SEP0718的SPI驱动程序的设计和实现

设备驱动程序的设计与实现在嵌入式系统的构建过程中是一个很重要的步骤。基于东南大学自主研发的嵌入式ARM11微处理器SEP0718,详细分析了SPI传输协议和芯片内模块功能,针对WinCE6.0嵌入式操作系统,设计和实现了一种通用SPI驱动程序用于微处理器和外设之间的数据同步串行传输,并编写了应用程序验证了驱动程序功能。验证结果表明该驱动程序达到了设计要求。     

AT91RM9200与TLV2543的接口应用

本文依据SPI串口的设计原理,介绍了AT91RM9200与12位串行A/D转换器TLV2543通过SPI口实现实时通讯的接口电路与软件设计方法.运行结果表明,在嵌入式系统中用串行外设接口(SPI)来扩展外设,接口简单,控制方便.     

基于CC2420的无线传感节点平台研究

介绍了串行外设接口(SPI)在无线射频芯片CC2420和ARM处理器AT91RM9200接口中的应用方案,给出了二者详细的硬件连接图和嵌入式Linux下驱动的实现方法,该方法同样适合其他具有SPI接口的芯片和微处理器之间的接口与编程.CC2420和AT91RM9200基于SPI的串行通信为无线传感器网络提供了一个节点硬件平台的解决方案.     

虚拟SPI在XF-S4240与MCS51通信中的应用

SPI总线技术是Motorola公司推出的一种同步串行接口.它可以使MCU与各种外围设备以串行方式进行通信以交换信息,并且硬件连接较少,编程方便.SPI接口已经是一种标准外设接口,目前已有很多MCU及外设都带有SPI接口.     

基于现场监测的嵌入式Flash文件系统的设计和实现

为有效地管理历史数据和运行数据，提高系统的性能，基于嵌入式系统的思想和方法，本文设计了一种嵌入式Flash文件系统。文件系统利用串行外设接口SPI实现Flash存储器与单片机之间硬件接口的融合，并采用单级目录结构和链接页的方法实现对文件数据的管理。     

基于Windows CE的SPI驱动程序设计

设备驱动程序是直接与硬件或者虚拟设备进行交互,将对硬件或者虚拟设备的操作打包成一组操作系统调用,并完全隐藏了设备工作细节的编程接口,因此驱动程序的编写在嵌入式系统开发中是一个重要的环节.本文通过阐述Windows CE操作系统中流式接口驱动的基本概念和工作原理、中断处理机制、内层共享等问题,详细介绍在Platform Builder下SPI驱动程序设计以及驱动程序同应用程序交互的实现.     

ARM-Linux外扩AD驱动程序的研究与实现

S3C2410内部ADC难以满足高精度的A/D转换需求,所以使用高精度的CS1180作为S3C2410的外部A/D转换器.详细介绍了24位串行A/D转换器CS1180的结构和特点,设计了与S3C2410的接口电路;阐述了嵌入式Linux设备驱动程序的特点,并通过实例说明了CS1180驱动程序的实现细节.CS1180与S3C2410基于SPI的串行通信为高精度数据采集的嵌入式设备提供了一个解决方案.     

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.     

Semantics and verification of monitors and systems of monitors and processes

In this paper we present a sound and complete semantics for the monitor concept of C.A.R. Hoare. First a method for specification of monitors, introduced by O.-J. Dahl, is reviewed. This method is based on the relation between the historic sequence of monitor procedure calls and the historic sequence of monitor procedure exits. Based on such specifications and our new monitor semantics we present a method by which it is possible to prove that a concrete monitor is an implementation of an abstract one. In the last part of the paper an axiomatic semantics for systems of concurrent processes and monitors is introduced. The method supports verification by separation of concerns: Properties of the communication to and from each process are proven in isolation by a usual Hoare style axiomatic semantics, while abstract monitors are also specified in isolation by the method reviewed in the first part of the paper. These properties of the components of the system are then used in a new proof rule to conclude properties of the complete system. Stein Gjessing received a Ph.D. (actually a Dr. philos.) from the University of Oslo (Norway) in 1985. Presently he is an Associate Professor at the Institute of informatics, University of Oslo, Norway. Dr. Gjessings research interests are in the area of concurrent and distributed programming, operating systems, formal specification and verification and programming languages.     

Integrating and automating analysis and optimization

The development of an interface coupling program on personal computers for an analysis software system such as ANSYS, SAP, etc. and an optimization software system, MOST, is presented. By controlling and directing the communications the interface coupler integrates the two programs while retaining their versatility and interactive features. The integrated system is used to solve a numerical example of active noise control for a three-dimensional enclosure, in which an energy density level of control points is minimized by adding the sound source to cancel the unwanted noise. The interface coupling program automates with relatively low cost the iterative process for designing an engineering system, remaining flexible in acoustical modelling and efficient in equation solving. Also, the coupling interface is developed in a general-purpose way so that it can be expanded easily to integrate more analysis software packages of different kinds.