USB技术在数字包装印刷机系统中的应用

介绍了数字包装印刷机系统的整体设计以及USB控制器CYUSB3014芯片的特性。通过对USB控制器固件程序和FPGA程序的设计,实现了FPGA通过USB接口高速可靠的数据传输。     

基于FPGA的CAN_USB协议转换的研究

由于信息管理网络中一般采用以太和USB协议,所以CAN—USB协议的转换的研究具有实际的应用价值。在数据采集领域,基于FPGA的CAN—USB协议转换的研究给出了数据传输控制电路设计部分,给出了该模块的内部结构设计详图,接着详细论述了FPGA内部各个功能电路的设计思路和具体实现过程。     

基于FPGA+USB接口的硬件加密系统

文章介绍了一种基于FPGA+USB接口的硬件加密系统的设计,给出了基于USB接口的加密卡的硬件设计,阐述了FPGA、USB接口控制器等模块的功能,并重点介绍了系统的实现过程。     

基于FPGA的数据采集系统的设计

介绍了一种用于汽车姿态测量的数据采集系统的设计,该系统基于FPGA+USB架构,采用FPGA控制整个系统的采集时序,USB芯片作为数据采集通道,上位机完成姿态解算和数据显示功能.     

基于FPGA与USB2．0的实时数据采集与处理系统

介绍了一种基于FPGA与USB2．0的双通道实时数据采集与处理系统。该系统采用XC3S1200E芯片作为核心处理芯片,CY7C68013作为USB接口芯片,通过FPGA内部的控制模块控制A／D数据转换和USB的数据传输,并在FPGA内部完成数据的处理。实验证明,该系统基本能满足设计的要求。计算出所求粒子的直径。     

基于FPGA 的高速数据采集系统设计

为了实现高速、连续采样的数据采集系统,介绍了一种基于FPGA 的高速数据采 集系统的构成及技术实现。采用FPGA 作为主控制器,USB2. 0 协议标准传输数据,设计了数 据采集系统的硬件电路,包括模拟信号滤波整形电路,高速AD 接口电路,USB 接口电路等, 实现了对数据的高速连续采集。设计了系统应用软件,包括数据采集板的FPGA 程序和USB 固件程序,上位机应用软件等。实验测试结果表明,系统结构灵活,性价比高,抗干扰能力 强,各项指标均已达到了设计时的要求,具有广泛的实用性。     

USB在FPGA控制的高速数据采集系统中的应用

介绍了USB控制器CY7C68013的特性以及它在200M高速数据采集系统中的具体应用。该系统用来采集及处理激光雷达的回波信号，采用Xilinx公司的现场可编程门阵列（FPGA）为控制芯片，用Verilog语言自上而下进行FPGA设计以实现硬件控制功能，以USB为接口实现FPGA与PC机之间的高速数据传输。文中对USB模块进行了分析，详细介绍了PC端的固件设计、USB设备驱动程序设计以及应用程序设计．在信号的采集试验中USB能够快速可靠的传输数据，体现出较好的实用价值。     

用于独立高速USB收发器的ULPI接口规范公开发行

ULPI工作组目前宣布，首个用于高速通用串行总线（USB）和便携式USB（USB On—the—Go，OTG）收发器芯片的UTMI＋低引脚数接口（ULPI）行业规范已经公开发行。专用集成电路（ASIC）、系统级芯片（SoC）及现场可编程门阵列（FPGA）的设计人员可通过该规范开发符合业界标准的接口．将现成的高速USB收发器整合到他们的设计中。这样就节省了设计开发时间，简化了验证和产品测试过程，还能保证嵌入式USB核心逻辑器件与高速USB收发器的互联互通。     

USB3.0超高速多串口传输系统的设计

设计了一种基于USB3.0和FPGA的多串口传输系统,以实现超高速数据传输。介绍了系统的硬件设计框架及系统的软硬件设计流程,给出了系统软件设计框图、FPGA设计逻辑模块以及时序。最后给出了实验结果,验证了该系统的可行性。     

FPGA和USB2.0双工接口设计

为了实现FPGA与USB2.0之间稳定快速的数据传输,该设计利用USB2.0接口芯片CY7C68013的Slave FIFO模式,采用时分复用的方法设计了一种双向数据接口。在FPGA端,持续把从USB OUT FIFO读出的数据回写到USB IN FIFO,以实现系统的自环测试。该设计已被应用到超宽带(UWB)无线系统中,结果表明本接口工作稳定,数据传输准确,平均速率12Mb/s。     

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.     

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.     

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.