本文選題：數字示波器　切入點：微處理器　出處：《電子科技大學》2014年碩士論文　論文類型：學位論文

【摘要】：隨著市場需求的不斷增長,數字示波器更新換代的速度越來越快,其功能也在不斷地增加。優(yōu)秀的示波器產品除了具備高采樣率、高帶寬、高捕獲率等特性,良好的顯示界面和用戶體驗也成為重要決定的因素,另外,還需要兼容更多的外圍通訊接口,以增強自身的擴展性和數據共享能力。目前,傳統的國產示波器大多采用DSP作為處理器,這樣做可以具有很高的運行速度,在數據實時處理方面有很大的優(yōu)勢,但隨著待處理數據量的增大、外圍通訊接口的增多,其控制能力低下的缺點也進一步凸顯,相對而言,ARM處理器卻具有很強的系統管理功能。因此,本文使用了TI公司推出的DSP+ARM雙核架構處理器OMAP-L138,搭建一個示波器嵌入式處理的硬件平臺。該處理平臺擁有傳統的DSP平臺的優(yōu)勢,擁有強大的高速運算能力;同時又兼具ARM嵌入式平臺的特點,能夠運行Linux操作系統,方便的開發(fā)人機交互界面。該設計集成度高、成本低、開發(fā)難度不高,具備高性價比和市場競爭能力。本課題是高捕獲率三維示波器的一個子項目,設計基于OMAP-L138的嵌入式處理平臺,實現對外圍設備及接口的控制,以及處理器與FPGA進行數據傳輸并顯示的目標。論文的主要研究內容包括:1.系統外圍通信接口的硬件設計。在確定了核心器件FPGA的選型后,結合OMAP-L138的外設資源,對RS-232接口、以太網接口、SDcard接口、USB OTG接口和VGA接口進行逐一分析確定硬件設計方案并給出電路圖。2.系統配置電路的設計,包括處理器的時鐘與復位,DDR2 SDRAM、Flash和鐵電存儲器的選型與設計,BOOT電路分析與設計,電源系統的分析設計,最后從信號完整性的角度分析了系統設計時應該注意的問題。3.使用EMIFA接口和uPP接口實現OMAP-L138與FPGA的數據交換,并以此為前提,通過二者傳輸效率的分析,詳細闡述了系統的數據傳輸設計和顯示設計。4.最后給出系統硬件調試過程和驗證結果,初步實現了設計目標,并提出了后續(xù)的研究要點。
[Abstract]:With the increasing demand of the market, the update speed of digital oscilloscope is getting faster and faster, and its function is also increasing. The excellent oscilloscope products not only have the characteristics of high sampling rate, high bandwidth and high capture rate, but also have the characteristics of high sampling rate, high bandwidth, high capture rate and so on. A good display interface and user experience are also important determinants. In addition, more peripheral communication interfaces need to be compatible to enhance their scalability and data sharing capabilities. Most of the traditional domestic oscilloscopes use DSP as the processor, so they can run at a high speed and have a great advantage in real-time data processing. However, with the increase of the amount of data to be processed, the peripheral communication interface increases. The weakness of its low control ability is further highlighted, but the arm processor has a strong system management function. This paper uses DSP ARM dual-core architecture processor OMAP-L138developed by TI to build a hardware platform for oscilloscope embedded processing. The processing platform has the advantages of traditional DSP platform and powerful high-speed computing capability. At the same time, with the characteristics of ARM embedded platform, it can run Linux operating system and develop man-machine interface conveniently. The design is of high integration, low cost and easy to develop. This subject is a subproject of high capture rate 3D oscilloscope. The embedded processing platform based on OMAP-L138 is designed to control peripheral equipment and interface. The main contents of this paper include: 1. The hardware design of the peripheral communication interface of the system. After determining the selection of the core device FPGA, combining with the peripheral equipment resources of OMAP-L138, the paper introduces the RS-232 interface. The Ethernet interface, SDcard interface, OTG interface and VGA interface are analyzed one by one to determine the hardware design scheme, and the circuit diagram .2. the design of the system configuration circuit is given. Including the selection and design of clock and reset device DDR2 SDRAM Flash and ferroelectric memory, the analysis and design of boot circuit, the analysis and design of power supply system, Finally, from the point of view of signal integrity, the paper analyzes the problems that should be paid attention to in the design of the system. Thirdly, the data exchange between OMAP-L138 and FPGA is realized by using EMIFA interface and uPP interface, and the transmission efficiency between OMAP-L138 and FPGA is analyzed through the analysis of their transmission efficiency. The data transmission design and display design of the system are described in detail. Finally, the hardware debugging process and verification results of the system are given, the design objectives are preliminarily realized, and the following research points are put forward.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM935.3

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本文編號：1563212