MSP430单片机实用技术讲座(15) 第10讲 MSP430串行异步通讯原理与实现

本讲讲述串口功能与连接的实现。大多数MSP430芯片都有硬件异步通讯功能，有一些器件有两个通讯端口，也有少数没有。没有硬件串口的芯片可以实现软件(模拟)串口。下面表格为430系列芯片串口的情况。     

基于Modbus协议的多机通信系统的设计与实现

在采用嵌入式微处理器S3C2440X芯片为核心的基础上,扩展外围硬件,裁剪移植WinCE操作系统,利用S3C2440X芯片的多串口特性设计了基于Modbus协议的ARM9核心板与多单片机及西门子PLC主控机串行通信的多机通信系统,介绍了基于RS-485总线技术的多机通讯的原理,提供了多机通信系统的硬件电路图和软件设计方案,将此多机通信系统应用到电梯的控制系统中,提高了电梯控制系统的效率。     

VxWorks下多串口卡驱动程序设计

以基于OX16PCI958串口芯片的多串口卡驱动为例,分析了VxWorks串口驱动的层次和机理,研究了tty驱动和底层SCC驱动的工作原理。通过对基于OX16PCI958芯片的多串口通信驱动程序的实际编写与参数定制,给出了PPC体系结构微处理器的串口驱动程序设计基本方法、步骤,并指出了该方法对基于VxWorks的安全平台实现高速串行数据通信及安全处理的实用价值。     

基于ARM7与μClinux的嵌入式系统多串口设计

针对基于ARM7内核微处理器和μClinux操作系统的嵌入式系统,介绍了利用IMP16C554芯片对其进行多串口扩展。给出了系统设计方案,详细阐述了多串口设备驱动程序的设计方法,并重点介绍了对IMP16C554芯片的初始化设置和基于中断工作模式的扩展串行接口编程。     

基于ARM9的嵌入式系统研究及设计

为适应嵌入式技术在现代工业及电子等更多领域的广泛应用,通过对ARM9嵌入式微处理器芯片S3C2410的研究,设计出基于S3C2410核心板的嵌入式系统开发底板,更多的需求及功能可在其底板上进行扩展与实现.首先对ARM9嵌入式微处理器S3C2410进行介绍,然后给出了基于S3C2410核心板的嵌入式系统开发底板的设计与功能扩展,包括开发板总体设计,电源模块设计,各种通信模块设计如串口、JTAG接口、网络接口、CAN总线通信接口等.该模板的设计实现了嵌入式系统在更多更广泛领域应用的灵活性.     

基于SPI接口通讯的终端安全芯片设计与实现

文中通过对SPI接口通讯技术的研究,提出了一种应用于终端安全芯片接口通讯的解决方案,解决了终端安全芯片与微处理器的接口通讯低效的问题。文中首先分析了终端安全芯片的功能需求,描述了功能实现所依赖的硬件平台,接着给出了具体的软件设计和硬件设计,然后对采用SPI接口通讯所实现的加密算法功能进行了介绍。测试结果及试点情况表明这种设计方案具有实际的应用价值和良好的使用效果。     

基于ARM微处理器及嵌入式Linux的串口网桥软硬件设计

介绍ARM7TDMI内核的微处理器S3C4510B在串口网桥设备开发中的应用,以及串口网桥硬件结构的组成和设计,并对基于ARM和uClinux的嵌入式系统软件开发模式进行了探讨.     

基于多端口存储器互连结构的多处理器系统芯片设计

多处理器系统芯片设计的关键问题之一是微处理器之间的互连结构.在总线互连结构和开关互连结构之后,提出了基于多端口存储器的第3种互连结构.利用VHDL进行了多时钟多端口存储器设计,并利用EDA工具进行了片上系统芯片的多微处理器数据通讯的功能仿真.分析了基于总线、基于开关、基于多端口存储器的3种互连结构的特点.研究表明基于多端口存储器的互连结构具有异步数据传输,数据缓冲功能;具有数据传输延时小,多微处理器系统芯片的拓扑阵列规模可扩展的优点.     

基于AMBE-2000的语音通讯系统

AMBE-2000是一款语音质量较好的多速率语音编码／解码芯片。介绍了AMBE-2000的性能特点、工作原理、与微处理器的接口电路，提出了基于AMBE-2000研制的语音通讯声码器的具体实现方案，并给出语音压缩通讯系统的应用实例。     

关于ARM微处理器及嵌入式Linux的串口网桥软硬件设计

介绍ARM7TDMI内核的微处理器S3C4510B在串口网桥设备开发中的应用，以及串口网桥硬件结构的组成和设计，并对基于ARM和uClinux的嵌入式系统软件开发模式进行了探讨。     

Technology innovation and process integrations for sub-100nm gate patterning

This paper presents a brief overview of the Applied Centura(R)DPS(R)system,configured with silicon etch DPS Ⅱ chamber, with emphasis on discussing tuning capability for CD uniformity control. It also presents the studies of etch process chemistry and film integration impact for an overall successful gate patterning development. Discussions will focus on resolutions to key issues, such as CD uniformity, line-edge roughness, and multilayer film etching integration.     

Complete approach to automatic identification and sub-pixel center location for ellipse feature

To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction.     

White organic light-emitting devices based on fac tris（2- phenylpyridine） iridium sensitized 5,6,11,12-tetraphenylnap -hthacene

We have fabricated the white organic light-emitting devices （WOLEDs） based on 4,4＇ -bis（2,2 -diphenyl vinyl）-1,1＇ - biphenyl （DPVBi） and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene （rubrene）. The device structure is ITO/2T-NATA （20 nm）/NPBX （20 nm）/CBP： x%Ir（ppy）3：0.5% rubrene （8 nm）/NPBX （5 nm）/DPVBi （30 nm）/Alq（30 nm）/LiF（0.5 nm）/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris （2-phenylpyridine） iridium [Ir（ppy）3], acts as a yellow light-emitting layer, and N,N＇ -bis- （1-naphthyl）- N,N＇ -diphenyl -1, 1＇ -biphenyl-4,4＇ -diamine （NPBX） acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir （PPY）3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V.     

小角度扩展相关性近似算法分析

本论文提出一种在多天线MIMO信道相关性建模中小角度扩展近似理论算法,并应用于分析MIMO系统性能。分析中分别对三种不同角能量分布情况下的空间相关性研发快速近似计算法,并同时提出双模(Bi-Modal)角能量分布情况下的近似运算。通过分析这些新方法的近似效率,可以得到计算简单、复杂度低、而且符合实际的MIMO相关信道矩阵,对系统级的快速高效计算法的研究和系统级的评估以及误差分析具有重要的意义。     

A Versatile Mixed-Signal Pin Approach for Cost-Effective Test of Automotive ICs

Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise timing capability. Along with continued missioncritical reliability concerns, the trend toward higher voltage operation and increased device integration requires specialized test capabilities able to extend across the wide operating ranges found in automotive applications. Among these capabilities, automotive test requirements increasingly dictate a need for a cost-effective versatile mixed-signal pin electronics with very high data rates reaching up to 50MHz with a voltage swing of-2 V to +28 V.     

Optical vibration and deviation measurement of rotating machine parts

It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer （LDV）.     

社长序言（英文）

正Happy New Year!As we step into a new year,we take a look back at the key feature topics covered in China Communications over the past 12 months and set out our expecta-     

Call for Papers

正Introduction Jointly sponsored by the China Institute of Communications(CIC)and the IEEE Communications Society(IEEE ComSoc)since the year 2013,China Communications,currently,is aiming to gradually realise the transition from journal to magazine content and style.     

INTEGRATION OF OPTICAL AND WIRELESS NETWORKS

正For a long time,optical and wireless systems/net-works are developed in separate communities witha few attempts for in-depth convergence.In fact,it prom-ises many advantages to combine the optical and wire-less technologies in the levels of systems and networks.Recently,both academia and industry have made manyefforts to enter a new phase of development to take op-tical and wireless systems as fully integrated networks.To provide high bandwidth and reliable service for bothfixed and mobile users,a well-designed network must     

Call for Papers—Feature Topic,Vol.12,No.3,2015

正Smart Grid Communications The electric power industry is undergoing profound changes as the industry aims to capture the promise of a smart grid for a sustainable energy future.Enabled by the advanced sensing devices such as Phasor Measurement Units(PMUs),increasingly powerful