基于OMAP-L138的数字三维示波器嵌入式处理平台硬件设计

发布时间：2018-03-03 23:34

本文选题：数字示波器　切入点：微处理器　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着市场需求的不断增长,数字示波器更新换代的速度越来越快,其功能也在不断地增加。优秀的示波器产品除了具备高采样率、高带宽、高捕获率等特性,良好的显示界面和用户体验也成为重要决定的因素,另外,还需要兼容更多的外围通讯接口,以增强自身的扩展性和数据共享能力。目前,传统的国产示波器大多采用DSP作为处理器,这样做可以具有很高的运行速度,在数据实时处理方面有很大的优势,但随着待处理数据量的增大、外围通讯接口的增多,其控制能力低下的缺点也进一步凸显,相对而言,ARM处理器却具有很强的系统管理功能。因此,本文使用了TI公司推出的DSP+ARM双核架构处理器OMAP-L138,搭建一个示波器嵌入式处理的硬件平台。该处理平台拥有传统的DSP平台的优势,拥有强大的高速运算能力;同时又兼具ARM嵌入式平台的特点,能够运行Linux操作系统,方便的开发人机交互界面。该设计集成度高、成本低、开发难度不高,具备高性价比和市场竞争能力。本课题是高捕获率三维示波器的一个子项目,设计基于OMAP-L138的嵌入式处理平台,实现对外围设备及接口的控制,以及处理器与FPGA进行数据传输并显示的目标。论文的主要研究内容包括:1.系统外围通信接口的硬件设计。在确定了核心器件FPGA的选型后,结合OMAP-L138的外设资源,对RS-232接口、以太网接口、SDcard接口、USB OTG接口和VGA接口进行逐一分析确定硬件设计方案并给出电路图。2.系统配置电路的设计,包括处理器的时钟与复位,DDR2 SDRAM、Flash和铁电存储器的选型与设计,BOOT电路分析与设计,电源系统的分析设计,最后从信号完整性的角度分析了系统设计时应该注意的问题。3.使用EMIFA接口和uPP接口实现OMAP-L138与FPGA的数据交换,并以此为前提,通过二者传输效率的分析,详细阐述了系统的数据传输设计和显示设计。4.最后给出系统硬件调试过程和验证结果,初步实现了设计目标,并提出了后续的研究要点。
[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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM935.3

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