本文依據(jù)集成電路設(shè)計(jì)方法學(xué)，探討了一種基于標(biāo)準(zhǔn)Intel 8086 微處理器的單芯片計(jì)算機(jī)平臺的架構(gòu)。研究了其與SDRAM，8255 并行接口等外圍IP 的集成，并在對AMBA協(xié)議和8086 CPU分析的基礎(chǔ)上，采用遵從AMBA傳輸協(xié)議的系統(tǒng)總線代替?zhèn)鹘y(tǒng)的8086 CPU三總線結(jié)構(gòu)，搭建了基于8086 IP 軟核的單芯片計(jì)算機(jī)系統(tǒng)，并實(shí)現(xiàn)了FPGA 功能演示。關(guān)鍵詞：微處理器； SoC；單芯片計(jì)算機(jī)；AMBA 協(xié)議 Design of 8086 CPU Based Computer-on-a-chip System（School of Electrical Engineering and Automation, Heifei University of Technology, Hefei, 230009,China）Abstract: According to the IC design methodology, this paper discusses the design of one kind of Computer-on-a-chip system architecture, which is based on the standard Intel8086 microprocessor,investigates how to integrate the 8086 CPU and peripheral IP such as, SDRAM controller, 8255 PPI etc. Based on the analysis of the standard Intel8086 microprocessor and AMBA Specification,the Computer-on-a-chip system based on 8086 CPU which uses AMBA bus instead of traditional three-bus structure of 8086 CPU is constructed, and the FPGA hardware emulation is fulfilled.Key WORDs: Microprocessor; SoC; Computer-on-a-chip; AMBA Specification
標(biāo)簽： 8086 CPU 單芯片 計(jì)算機(jī)系統(tǒng)
上傳時(shí)間： 2013-12-27
上傳用戶：kernor
基于單DSP的VoIP模擬電話適配器研究與實(shí)現(xiàn):提出和實(shí)現(xiàn)了一種新穎的基于單個(gè)通用數(shù)字信號處理器(DSP)的VoIP模擬電話適配器方案。DSP的I/O和存儲資源非常有限，通常適于運(yùn)算密集型應(yīng)用，不適宜控制密集型應(yīng)用[5]。該系統(tǒng)高效利用單DSP的I/O和片內(nèi)外存儲器資源，采用μC/OS-II嵌入式實(shí)時(shí)操作系統(tǒng)，支持SIP和TCP-UDP/IP協(xié)議，通過LAN或者寬帶接入，使普通電話機(jī)成為Internet終端，實(shí)現(xiàn)IP電話。該系統(tǒng)軟硬件結(jié)構(gòu)緊湊高效，運(yùn)行穩(wěn)定，成本低，具有廣闊的應(yīng)用前景。關(guān)鍵詞：模擬電話適配器；IP電話；數(shù)字信號處理器；μC/OS-II 【Abstract】This paper presents a VoIP ATA solution based on a single digital signal processor (DSP). DSPs are suitable for arithmetic-intensiveapplication and unsuitable for control-intensive application because of the limitation of I/O and memory resources. This solution is based on a 16-bitfixed-point DSP and μC/OS-II embedded real-time operating system. It makes good use of the limited resources, supports SIP and TCP-UDP/IPprotocol. It can connect the analog telephone to Internet and realize the VoIP application. This system has a great future for its high efficiency andlow cost.【Key WORDs】Analog telephone adapter (ATA); Voice over Internet protocol (VoIP); Digital signal processor (DSP); μC/OS-II Research and Implementation of VoIPATA Based on Single DSP
上傳時(shí)間： 2013-11-20
上傳用戶：Wwill
基于單片機(jī)的步進(jìn)電機(jī)開環(huán)控制系統(tǒng):通過ATMEL89C51單片機(jī)對步進(jìn)電機(jī)進(jìn)行控制,主要介紹了步進(jìn)電機(jī)控制器、驅(qū)動(dòng)電路和LED顯示電路的設(shè)計(jì),實(shí)現(xiàn)了步進(jìn)電機(jī)的開環(huán)控制。在步進(jìn)電機(jī)控制器的設(shè)計(jì)中,重點(diǎn)闡述了脈沖產(chǎn)生電路以及對速度的控制。該系統(tǒng)具有成本低、控制方便的特點(diǎn)。關(guān)鍵詞: 單片機(jī); 步進(jìn)電機(jī); 開環(huán)控制 Abstract: The design using ATMEL89C51 single chip to control the step2motor with its controller, driving circuit and LED disp lay circuit to realize step motor open2loop controlwere introduced. For the controller in this design,the circuit to p roduce pulse and the speed controlwere expatiated emphatically. This system possesses features of lower cost, easier control.Key WORDs: single ch ip; step2motor; open2loop con trol
標(biāo)簽： 單片機(jī) 步進(jìn)電機(jī) 開環(huán) 控制系統(tǒng)
上傳時(shí)間： 2013-10-13
上傳用戶：cicizoe
基于單片機(jī)的除塵控制器的設(shè)計(jì):介紹通用控制儀的硬件組成和軟件設(shè)計(jì),闡述了系統(tǒng)的性能指標(biāo)和功能特點(diǎn)。該產(chǎn)品功能完善,可靠性高,具有很好的應(yīng)用前景。關(guān)鍵詞: 除塵器;通用控制儀;單片機(jī);系統(tǒng)設(shè)計(jì) Abstract: The hardware structure and the software design are introduced in this paper, and the performance index and the features of the system are expounded. It has comp rehensive functions, high reliability and good app lication.Key WORDs: dust catcher; universal controller; microcontroller; system design
上傳時(shí)間： 2013-11-16
上傳用戶：ming52900
文章提出了一種精簡指令集8 位單片機(jī)中, 算術(shù)邏輯單元的工作原理。在此基礎(chǔ)上, 對比傳統(tǒng)PIC 方案、以及在ALU 內(nèi)部再次采用流水線作業(yè)的332 方案、44 方案, 并用Synopsys 綜合工具實(shí)現(xiàn)了它們。綜合及仿真結(jié)果表明, 根據(jù)該單片機(jī)系統(tǒng)要求, 44 方案速度最高, 比332 方案可提高43.9%, 而面積僅比最小的332 方案增加1.6%。在分析性能差異的根本原因之后, 闡明了該方案的優(yōu)越性。關(guān)鍵詞: 單片機(jī), 精簡指令集, 算術(shù)邏輯單元, 流水線 Abstract: Work principle for ALU in an 8_bit RISC Singlechip microcomputer is described. The traditional PIC scheme, 332 Pipeline scheme and 44 Pipeline scheme are compared on the base of the principle, which are implemented using Synopsys design tools. Results from synthesis and simulation shows that 44 scheme operates the fast, which is 43.9% faster and only 1.6% larger than 332 scheme. The essential reason why the performance is so different is analyzed.Then the advantage of 44 scheme is clarified.Key WORDs: Singlechip, Microcomputer, RISC, ALU, Pipeline
上傳時(shí)間： 2013-10-18
上傳用戶：xiaoyaa
一種實(shí)用的微機(jī)自動(dòng)配料秤系統(tǒng):介紹一種由單片機(jī)構(gòu)成的配料秤。敘述了秤的傳感器、變送器、信號的變換、硬件原理、軟件流程以及和DCS 系統(tǒng)構(gòu)成的單回路調(diào)節(jié)系統(tǒng),此系統(tǒng)可廣泛地應(yīng)用于各行業(yè)的配料控制中。關(guān)鍵詞:配料秤 單片機(jī) 單回路調(diào)節(jié)系統(tǒng) DCS 系統(tǒng) Abstract :A proportioning weigher based on single chip computer is introduced. Sensors , transmitters , signal converting , principle of hardware ,software flowchart of proportioning weigher and single loop control system composed with DCS system are emphasized ,this system can be used in proportioning control of various trades extensively.Key WORDs :Proportioning Weigher ,Single Chip Computer ,Single Loop Control System ,Distributed Control System
上傳時(shí)間： 2013-10-12
上傳用戶：zwei41
提出了一個(gè)由AT89C52單片機(jī)控制步進(jìn)電機(jī)的實(shí)例?？梢酝ㄟ^鍵盤輸入相關(guān)數(shù)據(jù), 并根據(jù)需要, 實(shí)時(shí)對步進(jìn)電機(jī)工作方式進(jìn)行設(shè)置, 具有實(shí)時(shí)性和交互性的特點(diǎn)。該系統(tǒng)可應(yīng)用于步進(jìn)電機(jī)控制的大多數(shù)場合。實(shí)踐表明, 系統(tǒng)性能優(yōu)于傳統(tǒng)的步進(jìn)電機(jī)控制器。關(guān)鍵詞: 單片機(jī); 步進(jìn)電動(dòng)機(jī); 直流固態(tài)繼電器; 實(shí)時(shí)控制Con trol System of Stepp ingMotor Ba sed on AT89C52 ChipM icrocomputerMENGWu2sheng, L ILiang (College of Automatization, Northwestern Polytechnical Unversity, Xipan 710072, China)ABSTRACT: A stepp ing motor control system based on AT89C52 chip microcomputer was described.The data can be inputwith keyboard, and stepp ingmotorwas controlled by these data. According to the demand, users can set the workingmodel of stepp ingmotor in real2time. This system can be widely used in stepp ing motor controlling. The p ractice showed that the performance of this system outdid the tradi tional stepp ing motor controller.KEY WORDs: Chip microcomputer; Stepp ingmotor; DCSSR; Real2time control
標(biāo)簽： Control System ingMot Stepp
上傳時(shí)間： 2013-11-19
上傳用戶：leesuper
CAN與RS232轉(zhuǎn)換節(jié)點(diǎn)的設(shè)計(jì)與實(shí)現(xiàn) 介紹將CAN總線接口與RS232總線接口相互轉(zhuǎn)換的設(shè)計(jì)方法和2種總線電平轉(zhuǎn)換關(guān)系，實(shí)現(xiàn)CAN總線與各模塊的接口設(shè)計(jì)，制定了相應(yīng)的軟硬件設(shè)計(jì)方案，并給出軟件設(shè)計(jì)流程圖以及部分硬件設(shè)計(jì)原理圖。為CAN總線與RS232總線互聯(lián)提供了一種方法，對CAN總線與RS232總線接口設(shè)備的互聯(lián)和廣泛應(yīng)用的實(shí)現(xiàn)具有重要意義。關(guān)鍵詞：CAN總線；RS-232總線；串行通信Design and Realization of CAN and RS232 Transformation NodeZHOU Wei, CHENG Xiao-hong(Information Institute, Wuhan University of Technology, Wuhan 430070)【Abstract】This paper introduces one design method of the CAN bus interface and the RS232 bus interface interconversion, emphasizes two kindof bus level transformation relations, realizes the CAN bus and various modules connection design, formulates the design proposal of correspondingsoftware and hardware, and gives the flow chart of software design as well as the partial schematic diagram of hardware design. It providesonemethod for the CAN bus and the RS232 bus interconnection, has the vital significance to widespread application realization of the CAN busand theRS232 bus interface equipment interconnection.【Key WORDs】CAN bus; RS-232 bus; serial communication
標(biāo)簽： CAN 232 RS 轉(zhuǎn)換
上傳時(shí)間： 2013-11-04
上傳用戶：leesuper
基于ADSP-BF561的數(shù)字?jǐn)z像系統(tǒng)設(shè)計(jì)Design of Digital Video Camera System Based on Digital Signal ProcessorADSP-BF561（浙江大學(xué) 信息與通信工程研究所，浙江 杭州 310027） 馬海杰, 劉云海摘要：介紹了基于ADI雙核的數(shù)字信號處理芯片ADSP-BF561 的數(shù)字?jǐn)z像系統(tǒng)實(shí)現(xiàn)方案。系統(tǒng)包括硬件和軟件兩部分，硬件主要有ADSP-BF561及其外圍電路、音視頻模數(shù)/數(shù)模轉(zhuǎn)換、CF卡/微硬盤接口等部分。軟件主要有操作系統(tǒng)及音視頻編解碼算法等部分。關(guān)鍵詞：ADSP-BF561 ;數(shù)字?jǐn)z像機(jī);微硬盤;MPEG-4;A/D;D/A中圖分類號:TN948.41文獻(xiàn)標(biāo)識碼:AAbstract: An implementation of digital video camera system based on ADI dual core digital signal processor ADSP-BF561 is introduced. The system can be divided into two parts——hardware and software design. The hardware design includes ADSP-BF561 and perpheral apparatus, A/D,D/A, CF card or Microdrive and so on. The software includes operating system , audio and video coding algorithm.Key WORDs: ADSP-BF561; digital video camera; microdrive; MPEG-4;A/D;D/A
標(biāo)簽： ADSP-BF 561 數(shù)字?jǐn)z像 系統(tǒng)設(shè)計(jì)
上傳時(shí)間： 2013-11-10
上傳用戶：yl1140vista
摘 要:用一種新的思路和方法,先計(jì)算低通、再計(jì)算高通濾波器的有關(guān)參數(shù),然后組合成帶通濾波器.關(guān)鍵詞:濾波器;參數(shù);新思路中圖分類號: TN713. 5 文獻(xiàn)識別碼:B 文章編號:1008 - 1666 (1999) 04 - 0089 - 03A New Consideration of the Band Filter’s CalculationGuo Wencheng( S hao Yang B usiness and Technology school , S haoyang , Hunan ,422000 )Abstract :This essay deals with a new method of calculating the band filters - first calculatingthe relevant parameters of low - pass filters ,then calculating the ones of high - pass filters.Key WORDs :filter ; parameters ;new considercation八十年代后,信息產(chǎn)業(yè)得到了迅猛發(fā)展. 帶通濾波器在微波通信、廣播電視和精密儀器設(shè)備中得到了廣泛應(yīng)用. 帶通濾波器性能的優(yōu)劣,對提高接收機(jī)信噪比,防止鄰近信道干擾,提高設(shè)備的技術(shù)指標(biāo),有著十分重要的意義.我在長期的教學(xué)實(shí)踐中,用切比雪夫型方法設(shè)計(jì)、計(jì)算出寬帶濾波器集中參數(shù)元件的數(shù)據(jù). 該濾波器可運(yùn)用在檢測微波頻率的儀器和其他設(shè)備中. 再將其思路和計(jì)算方法介紹給大家,供參考.
標(biāo)簽： 帶通濾波器設(shè)計(jì) 計(jì)算
上傳時(shí)間： 2014-12-28
上傳用戶：Yukiseop
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