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基于STM32F103實(shí)現(xiàn)Profibus-DP從站軟核的研發(fā)

發(fā)布時(shí)間:2018-12-14 17:09
【摘要】:Profibus-DP具有很高的市場(chǎng)占有率,主要用于設(shè)備級(jí)控制系統(tǒng)與分散式I/O的通信中,安裝簡(jiǎn)單,即插即用,且通信實(shí)時(shí)可靠,功能比較完善等特點(diǎn),是目前國(guó)際上應(yīng)用最廣泛的一種現(xiàn)場(chǎng)總線。當(dāng)前,國(guó)內(nèi)對(duì)Profibus-DP的應(yīng)用與研究主要以國(guó)外的一些成套設(shè)備為主,而自主研究開發(fā)通信接口卻比較少[1]。在國(guó)內(nèi)大多數(shù)采用德國(guó)西門子公司提供的ASIC專用Profibus協(xié)議芯片SPC3開發(fā)Profibus-DP從站,但由于SPC3芯片價(jià)格昂貴,再之外圍器件的成本和軟件開發(fā)的成本,給生產(chǎn)廠家?guī)砹司薮蟮某杀緣毫,?dǎo)致國(guó)內(nèi)只有少量產(chǎn)品帶有Profibus-DP通信接口,無(wú)法被廣泛應(yīng)用。本文就針對(duì)該方案的缺點(diǎn),提出了采用廉價(jià)的高性能的普通ARM7芯片STM32F103軟核開發(fā)Profibus-DP從站,,代替了Profibus-DP專用芯片。通過有效地分配STM32F103的資源,采用硬件與軟件相結(jié)合,開發(fā)智能DP從站,具有硬件成本低、通信速率高、易修改及擴(kuò)展、靈活性高等優(yōu)點(diǎn)。 本文將從以下幾方面進(jìn)行介紹Profibus-DP從站: (1)介紹現(xiàn)場(chǎng)總線技術(shù)的發(fā)展概況、應(yīng)用前景以及Profibus-DP協(xié)議在國(guó)內(nèi)外的應(yīng)用情況,論述了國(guó)內(nèi)開發(fā)Profibus-DP從站所采取的方案及其存在的局限性,指出了本課題的研究方案、研究?jī)?nèi)容及待解決的關(guān)鍵技術(shù)。 (2)比較目前國(guó)內(nèi)開發(fā)Profibus-DP從站所采取的方案,指出各自存在的優(yōu)缺點(diǎn),提出一種基于ARM7芯片STM32F103軟件實(shí)現(xiàn)Profibus-DP智能從站的方案,并針對(duì)預(yù)期的指標(biāo)進(jìn)行可行性分析。 (3)重點(diǎn)介紹Profibus-DP從站的硬件和軟件設(shè)計(jì)。從硬件原理圖的設(shè)計(jì)、PCB版的制作、電路的焊接及調(diào)試到軟件編程進(jìn)行詳細(xì)介紹。硬件電路主要包含微處理器接口、電源電路、RS485通信接口。軟件主要完成MAC層及LLC層的功能,如高速數(shù)據(jù)收發(fā)、幀間隔識(shí)別、幀解析、處理及封裝等。 (4)采用CP5611+PC機(jī)作為Profibus-DP主站,搭建Profibus-DP從站的測(cè)試平臺(tái),對(duì)本方案實(shí)現(xiàn)的Profibus-DP從站進(jìn)行測(cè)試,是否達(dá)到預(yù)期的指標(biāo)。 (5)最后,采用自制的丟包率測(cè)試站對(duì)已完成的DP從站進(jìn)行丟包率測(cè)試,給出測(cè)試的實(shí)驗(yàn)結(jié)果,并對(duì)實(shí)驗(yàn)數(shù)據(jù)進(jìn)行詳細(xì)地分析。 本文實(shí)現(xiàn)的Profibus-DP從站在降低成本的同時(shí),確保了高速通信的功能,可以廣泛地應(yīng)用于高速通信的工業(yè)現(xiàn)場(chǎng)網(wǎng)絡(luò)中,實(shí)現(xiàn)一個(gè)智能化的網(wǎng)絡(luò),便于用戶的管理。
[Abstract]:Profibus-DP has a high market share. It is mainly used in the communication between device level control system and distributed I / O, simple installation, plug and play, real time and reliable communication, perfect function, etc. It is the most widely used field bus in the world. At present, the domestic application and research of Profibus-DP is mainly based on some foreign complete sets of equipment, but the independent research and development of communication interface is relatively few [1]. In our country, most of the Profibus-DP slave stations are developed by SPC3, a special Profibus protocol chip provided by Germany Siemens. However, because of the high price of SPC3 chips, the cost of peripheral devices and software development is very high. It brings huge cost pressure to the manufacturers, resulting in a small number of domestic products with Profibus-DP communication interface, which can not be widely used. In view of the disadvantages of this scheme, this paper proposes to develop Profibus-DP slave station with cheap and high performance ordinary ARM7 chip STM32F103 soft core instead of Profibus-DP chip. By effectively allocating the resources of STM32F103 and combining hardware with software, the intelligent DP slave station is developed, which has the advantages of low hardware cost, high communication rate, easy modification and extension, high flexibility and so on. This paper will introduce the Profibus-DP slave station from the following aspects: (1) introduce the development of fieldbus technology, the application prospect and the application of Profibus-DP protocol at home and abroad. This paper discusses the scheme and limitations of developing Profibus-DP slave station in China, and points out the research scheme, research contents and key technologies to be solved. (2) comparing the schemes of developing Profibus-DP slave station in China, pointing out their advantages and disadvantages, putting forward a scheme of implementing Profibus-DP intelligent slave station based on STM32F103 software of ARM7 chip, and analyzing the feasibility of the expected index. (3) introduce the hardware and software design of Profibus-DP slave station. From the hardware schematic design, PCB version of the production, circuit welding and debugging to software programming for detailed introduction. Hardware circuit mainly includes microprocessor interface, power circuit, RS485 communication interface. The software mainly completes the functions of MAC layer and LLC layer, such as high-speed data transceiver, frame interval identification, frame analysis, processing and encapsulation. (4) using CP5611 PC machine as Profibus-DP master station, the test platform of Profibus-DP slave station is built, and the Profibus-DP slave station realized by this scheme is tested, whether or not it reaches the expected target. (5) finally, the self-made test station for packet loss rate is used to test the packet loss rate of the completed DP slave station, and the experimental results are given, and the experimental data are analyzed in detail. The Profibus-DP realized in this paper not only reduces the cost, but also ensures the function of high speed communication. It can be widely used in the industrial field network of high speed communication, and realize an intelligent network, which is convenient for user management.
【學(xué)位授予單位】:溫州大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2012
【分類號(hào)】:TP273.5;TP368.1

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