基于OTG技术的数据传输系统的研究

发布时间：2018-02-11 18:30

本文关键词： 数据采集嵌入式系统时分复用数据直传技术通用串行总线主机端　出处：《中国民航大学》2014年硕士论文　论文类型：学位论文

【摘要】：数据采集系统作为智能系统的前端已经被广泛地应用在各个场合中。本文针对移动场合中多数据源的数据采集问题,综合考虑了USB设备的支持、多数据源的带宽需求、元器件性价比等因素,提出了一种基于时分复用技术的多源数据采集系统的设计方案。具体从以下几个方面展开:首先,介绍了系统的功能需求分析和总体设计。根据采集对象的要求,对图像信息采集技术和位置信息采集技术进行了说明。采集的图像信号经过格式转换、编码压缩后可以降低数据的传输速率。GPS设备接收卫星信号,从中提出相应信息并解算出前位置,位置信息信号通过USB接口输出。系统采用MCU+OTG接口芯片的结构,图像信号和位置信号通过OTG接口芯片,传输至系统的存储设备中。其次,重点介绍了时分复用技术和数据直传技术。时分复用技术用于管理多个OTG芯片的输出信号在系统总线的占用时间,数据直传技术是针对传统数据传输的改进,数据包可不经过MCU的缓存而直接从数据信息设备传输至数据存储设备,提高了系统数据传输的速率。详细说明了整个硬件设计中的相关模块:系统控制模块、OTG芯片模块、数据直传模块、内存扩展模块、对外接口模块、E2PROM选择模块和时钟分频模块,并给出了前期调试的实物图。最后阐述了三个驱动程序的设计:主控制器驱动程序,USB主机协议驱动程序和设备类驱动程序。主控制器驱动程序重点阐述了CY7C60813如何与ISP1362进行数据通信.USB主机协议驱动程序介绍了ISP1362芯片的初始化过程和枚举询问过程。最后简要地介绍下Mass Storage类驱动程序的设计。
[Abstract]:As the front end of intelligent system, data acquisition system has been widely used in various occasions. In this paper, the support of USB equipment and the bandwidth requirement of multiple data sources are considered comprehensively in view of the problem of data acquisition of multiple data sources in mobile environment. In this paper, a design scheme of multi-source data acquisition system based on time division multiplexing (TDM) technology is proposed, which includes the following aspects: first of all, The function requirement analysis and overall design of the system are introduced. According to the requirements of the object, the image information acquisition technology and the position information acquisition technology are explained. After coding and compressing, the data transmission rate can be reduced. The GPS device receives the satellite signal, puts forward the corresponding information and calculates the front position, and the position information is output through the USB interface. The system adopts the structure of the MCU OTG interface chip. Image signal and position signal are transmitted to the storage device of the system through OTG interface chip. Secondly, The technology of time division multiplexing (TDM) and direct transmission of data are introduced in detail. TDM is used to manage the occupancy time of the output signals of multiple OTG chips in the system bus. The technology of direct data transmission is aimed at the improvement of traditional data transmission. The data packet can be transferred directly from the data information device to the data storage device without the buffer of the MCU, which improves the data transmission rate of the system. The related modules in the whole hardware design are explained in detail: the system control module and the OTG chip module. Data direct transmission module, memory expansion module, external interface module E2PROM selection module and clock frequency division module, At last, the design of three drivers: main controller driver, host protocol driver and device class driver are introduced. The main controller driver focuses on how to use CY7C60813. This paper introduces the initialization process and enumeration process of ISP1362 chip and the design of Mass Storage class driver.
【学位授予单位】：中国民航大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.6

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