DSP与单片机串口通信的设计与实现

结合实际工程应用重点介绍了TMS320VC5416与单片机89C51之间串行通信的实现方法.通过DSP的输入接口对89C51的输出串口进行高速采样和判决达到单片机对DSP的数据传输,而通过将DSP所发送的数据进行数据变换达到89C51串口接收的标准来实现DSP对单片机的串行通信.串行接口与并行接口相比,最大的优点就是减少了使用DSP的引脚数目,降低了接口电路设计的复杂性.同时,充分利用DSP多功能串行接口和DMA搬移数据的能力,使DSP在处理串口通信时不会占用太多的处理时间,节约了DSP的资源.     

基于双口RAM技术的DSP与单片机之间的数据通信

随着计算机技术的发展,在工业自动控制中,由于系统的复杂性和要求提高,需要用到不同性能型号的CPU.而如何实现不同CPU之间的数据通信,是系统实现的难点之一.介绍了一种基于双口RAM IDT7130技术的DSP系统和单片机系统的数据通信方法,并对TMS320C32和IDT7130的性能和特点作了介绍,结合具体实例给出了他们之间的硬件接口电路.     

基于HPI方式的DSP引导方法的研究

介绍了一种HPI方式的DSP引导方法,利用代码转换工具将CCS生成的.out文件转换成.h文件.在HPI方式下利用作为HPI主机的单片机将代码写入到DSP的RAM中并且实现DSP的硬件复位功能.并给出了该引导方法的硬件电路、单片机的引导程序.     

基于单片机的HDB3编/译码器的设计与实现

介绍了一种基于单片机的HDB3编/译码器的设计.以常用的51系列单片机为核心,结合外围电路,实现了HDB3编/译码器的功能.在单片机应用系统之间的数字基带通信中,具有一定的应用前景.     

基于DSP和单片机通信的液晶显示设计

在含有人机界面的数字化电源系统中,为更好地发挥DSP的强大运算功能,可采用DSP＋51单片机的双CPU结构,因而二者之间的可靠通信至关重要。在此介绍了TMS320F2812型DSP和MCS51系列单片机的一种通信方案的设计与实现,给出对应的程序,并描述在此通信基础上实现的液晶显示电路和结构。该系统具有硬件电路简单、通信可靠、程序编写简单、界面友好等优点。实验证明系统能完整可靠地实现了人机界面功能,具有较高的实用价值。     

数字化UPS中DSP与单片机的串行通讯设计

在全数字化高频大功率UPS中,大都采用两片或多片DSP与单片机共同完成较为复杂的控制和监控任务。文中主要就SC I串行通讯接口实现DSP与单片机串行通讯展开讨论,同时给出了利用SPI实现串行通讯的设计方案,分析比较两种通讯方式异同,给出了DSP与单片机串行设计的基本方法。     

TMS320VC5402的HPI与51单片机的接口设计

主机接口(HPI)是TI公司数字信号处理器(DSP)中用于和主机(通常是微处理器)进行双向数据通信的8位并行接口.文中介绍了TMS320VC5402芯片中HPI口的基本工作原理,并以AT89C51单片机为主处理机,给出了与TMS320VC5402之间实现数据共享的接口电路和部分程序.     

基于DSP的USB语音传输接口设计

介绍了一种基于DSP的USB语音传输接口的设计.通过USB在DSP和PC机之间进行串行通信,实现PC机对设备的命令控制及语音数据的双向传输.本设计中使用了USB的3种数据传输方式:控制传输、中断传输和等时传输,为扩充设备的应用范围打下了基础.     

单片机与DSP实验教学比对

在单片机和DSP实验教学中,有不少学生对单片机容易上手和理解,但就DSP来说就比较困难。本文从存储器结构等几个方面比对了MCS-51系列单片机和C54XDSP的异同,能够达到辅助教学的作用。     

基于蓝牙技术的单片机与PC机无线数据通信

采用无线方式实现单片机与PC机之间的数据通信.硬件电路部分采用ESDBM蓝牙无线数据传输接口模块实现无线通信,并用AT89C51单片机实现数据的收发控制,用LED将收发的数据进行显示.软件设计采用汇编语言编程,主要对串口中断程序、键盘程序、显示程序和无线通信协议进行编程、调试和分析.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks