嵌入式单总线控制器设计

以数字式温度传感器DS1820为例,介绍了单总线器件的工作原理,详细分析了单总线器件的通信时序.微处理器与单总线器件通信时必须关闭中断,造成系统实时性差.对此提出了采用VHDL语言设计嵌入式单总线控制器的方法.给出了基于VHDL的嵌入式单总线控制器的软硬件设计及仿真波形.该控制器的功能已在MAX+plusⅡ平台上仿真实现,能够产生DS1820的通信时序.     

嵌入式移动机器人控制器设计

提出了一种基于数字信号处理器和嵌入式实时操作系统的移动机器人控制器设计方案。本方案通过在TMS320F2812型DSP上移植一个uC/OS-Ⅱ实时内核的方式,在增强系统的实时性和提高性价比的基础上提高了控制器的开放性,简化了应用程序的开发。     

Processor architecture considerations for embedded controller applications

The ways in which the environment of an embedded controller differs from that of a general-purpose CPU are described. A particular embedded controller application, the network interface is examined. The microprocessor used is the 32-bit VL86C010 Acorn RISC (reduced-instruction-set computer). The features of the network architecture, as they affect the choice of processor, are discussed. The impact of system latency on the choice of hardware is examined.<>     

嵌入式USB主机文件系统下的实时数据存储

随着移动数据存储的发展,嵌入式USB主机系统得到了广泛应用,因此在一些嵌入式USB主机系统中实现文件系统显得非常必要和关键.首先分析FAT16文件系统的结构原理和基于USB主机接口的嵌入式文件系统的层次化设计方法,并在此基础上分别按层次对文件系统的实现提出了一些优化方法,这些优化方法明显提高了文件系统的实现效率和性能,以满足实时性要求高的一些数据采集的应用场合.     

嵌入式Ad-Hoc网络下的实时语音通信

综合Ad-Hoc网络技术、多媒体开发技术、嵌入式技术和RTP实时传输技术,设计实现了一套在嵌入式Ad-Hoc网络环境下的全双工实时语音通信系统。语音编码、抖动处理、静音检测有效地提高了系统的语音传输质量。实验表明,该系统性能稳定,适应性强,有较广泛的应用。     

嵌入式控制器(EC)与COM Express的联合应用

<正> 当前,计算机技术日益发展,人们对各种各样计算机功能的需求越来越多,这些要求也不尽相同。所以就需要根据人们的要求,灵活定制各种不同功能的计算机,从大型的服务器到小型的移动设备、从简单的低端设备到高性能的高端机器、从工业用的工控机到军用加固机,可以通过使用控创的模块和一些外围控制电路(如EC-嵌入式控制器等)来满足人们的大部分要求。通过EC+模块既可以实现普通或者特殊的计算机功能,又可以根据不同人群的不同的需要进行定制。     

On a software-defined CAN controller for embedded systems

Controller Area Network (CAN) technology is nowadays ubiquitous in vehicular applications and is also gaining popularity in other contexts, for instance, embedded and industrial automation systems. The recent standardization of CAN with flexible data rate (CAN FD), as well as other academic proposals, have highlighted the usefulness of enhancing the CAN physical and data link layers to attain better performance and other features. This paper describes a portable software-defined CAN controller called SDCC. Besides being handy as a research tool for experimenting with novel protocol concepts at the data link layer, SDCC is also fully capable of real-time execution. Hence, it can interact with real-world CAN devices through a physical bus interface.     

一种基于嵌入式磁旋存储芯片的固态硬盘控制器芯片架构

传统企业级固态硬盘存储芯片采用外接DRAM(Dynamic Random Access Memory)颗粒的方式来存储闪存地址转换映射表,不仅成本高,占用面积大,还需要设计复杂的掉电保护流程和额外的备电保持电容。利用新型磁旋存储芯片的掉电非易失特性,以及密度高、速度快、功耗低、数据保持时间长、可擦写次数无限等特点,提出了一种基于嵌入式磁旋存储芯片的固态硬盘控制器架构方案,能够大大简化控制器芯片的掉电异常流程和备电设计,节省固态硬盘内部的备电电容成本,有效支撑固态硬盘的容量提升。     

嵌入式Linux下CAN控制器的驱动程序设计

嵌入式操作系统uClinux下扩展各类CAN总线设备,需设计相应的驱动程序。MCP2510为常用的CAN总线控制器,以它为例,详细研究分析了嵌入式操作系统中设备管理和驱动程序的特点,以及uClinux下CAN设备驱动程序的开发流程和技巧,并结合CAN总线技术的特点,设计了相关的重要数据结构和操作代码。最后介绍了把驱动程序编译添加进uClinux内核的方法,实现了CAN设备的驱动。     

Real-time estimation of emotional experiences from facial expressions

The present aim was to develop methods that estimate emotional experiences in real time from the electromyographic activity of two facial muscles: zygomaticus major (activated when smiling) and corrugator supercilii (activated when frowning). Ten subjects were stimulated with a series of emotionally arousing pictures and videos. After each stimulus the subjects rated the valence of their emotional experience on a nine-point bipolar dimensional scale. At the same time the computer estimated the subjects' ratings on the basis of their electrical facial activity during each stimulation with 70 computational models. The models estimated the subjects' ratings either categorically or dimensionally with regression models. The best categorical models were able to estimate negative and positive ratings with an average accuracy of over 70 and 80% for pictures and videos, respectively. The best correlations between the human ratings and machine estimations formed with the regression models were high (r>0.9). These findings indicate that models estimating psycho-emotional experiences on the basis of facial activity can be created successfully in several ways.     

Advanced control algorithms embedded in a programmable logic controller

This paper presents an innovative self-tuning nonlinear controller ASPECT (advanced control algorithms for programmable logic controllers). It is intended for the control of highly nonlinear processes whose properties change radically over its range of operation, and includes three advanced control algorithms. It is designed using the concepts of agent-based systems, applied with the aim of automating some of the configuration tasks. The process is represented by a set of low-order local linear models whose parameters are identified using an online learning procedure. This procedure combines model identification with pre- and post-identification steps to provide reliable operation. The controller monitors and evaluates the control performance of the closed-loop system. The controller was implemented on a programmable logic controller (PLC). The performance is illustrated on a field test application for control of pressure on a hydraulic valve.     

基于嵌入式的新型停车场智能控制器

分析了传统的基于PC的停车场控制器后发现,传统的停车场控制器具有受停车场规模的限制,布线复杂,以及未考虑到保障车辆在停车场中安全等缺点.为解决这些缺点,新型的停车场控制器采用嵌入式ARM系统来保证实时性和可靠性提高集成度,同时集成了SAA7115视频解码芯片,实现了实时补光选优算法,并支持后端车牌号牌自动识别,从而提供停车场内车辆的安全保障.经过大量测试和实际使用证明了该智能控制器具有高可靠性、稳定性以及很好的安全保障能力因此能够很好替代现有的传统停车场控制器.     

Real-time design of an adaptive nonlinear predictive controller

Based on real-time identification and using the concept of NARX (Nonlinear AutoRegressive with exogenous inputs) models, a new adaptive nonlinear predictive controller (ANPC) design is proposed. NARX models represent a natural way to describe the input-output relationship of severely nonlinear systems. From an initial batch of input-output data, a parsimonious NARX model is obtained using the Modified Gram-Schmidt (MGS) orthogonalization algorithm. Following this initial off-line identification and model reduction procedure, the control loop is closed. The ANPC directly uses the obtained structure and initial parameter estimates, which are updated each time step using recursive identification. The controller is designed similar to a typical linear predictive controller based on solving a nonlinear programming (NLP) problem. This paper shows how to solve this NLP problem on-line without the knowledge of the NARX model structure. The design is given for the multi-input multi-output (MIMO) case.     

嵌入式家庭控制器系统的设计与实现

一种用户可定制的嵌入式家庭控制器系统的总体设计方案,详细论述了系统采用的网络结构和各模块的软硬件设计。本系统的特点是可以对现有家用电器和安防装置进行集中或异地监视、控制以及三表的查收。     

ITS嵌入式控制主机的设计与实现

针对交通行业的发展需要,提出了以嵌入式主板为核心的ITS嵌入式控制主机的设计及实现方案。在为支持多路车检器和多路高清相机同时工作,实现了多车道车流量监测、过车抓拍、逆行抓拍、超速抓拍、压黄线抓拍、车辆测速等功能,同时实现了智能交通前端设备的自我保护、自我检测和远程监控等功能。     

基于以太网的控制器网络的嵌入式网关开发

基于以太网和控制器区域网总线通信系统的集成通信网关系统的开发。系统在以太网和控制器区域网总线间交换控制信息,以实现分布式控制和监测。     

笔记本电脑嵌入式控制器的设计与实现

为了解决各类便携式计算机中电源管理与功耗控制问题,延长电池续航时间,提出了一种适用于笔记本电脑嵌入式控制器(embedded controller,EC)的设计方法.分析了EC的功能特性,在此基础上从硬件设计与软件实现两个方面给出设计思路.介绍了软件的实现,结合模块化思想提出了主要模块的解决方法,从而提高数据读取及功能控制等多项关键性功能的效果与效率.功能测试验证了该设计的可行性与有效性.     

VXIbus嵌入式控制器研制中数据传输总线的设计

详细讨论了运用VMEbus接口控制器VIC068A和地址控制器VAC068A进行ISA总线到VME总线转换的电路设计方法,并给出了数据传输总线（DTB）的设计方案。