基于USB2.0的图像数据采集系统的研究.docVIP

摘要 所谓的图像采集是指利用图像传感器将外界图像信息量化成数字图像信息并进行传输和存储的过程。由于图像采集具有速度快，数据量大的特点，这就对用于图像数据传输的计算机接口提出了严格的要求。面对以往的传统接口，本论文提出一种采用USB2.0接口技术的图像采集系统方案。之所以采用USB2.0，因为USB2.0接口具有传输速率高、占用系统资源少、易于扩展、廉价、使用方便等优点，是目前广泛应用于数据传输的计算机接口之一。 本文首先对USB接口的相关原理进行了较为详细的介绍，包括USB形成的背景、USB接口的优点、USB层次结构、USB的通信协议、USB的数据传输方式等等. 随后针对本系统的设计所涉及的CMOS图像采集芯片OV7620和USB接口芯片CY7C68013的功能结构等作了详细的介绍，而后提出了本系统设计的原理框图及设计电路，并给出系统的各个部分连接电路图。在软件方面，介绍了USB接口芯片的固件程序，对用户的应用程序设计作了简单的引入，从而完成了驱动程序的开发设计。 关键词: USB2.0，OV7620，CY7C68013，固件，驱动程序 ABSTRACT The image acquisition is that the external image information is converted into digital information by the image sensor ,send and stored.as image acquisition is fast and massive,this is making strict request for computer interface.Comparing with the traditional interface, This dissertation proposes a method to build an image acquisition system with USB2.0 interface.we just take USB2.0,because USB2.0 is one of the most popular computer interface,which has theadvantages of high transfer-rate,less resource requirement,low cost,expandable and convenientable.It is now widly used in I in data transmission of computer interface. The dissertation reseacrhed the basie Principle of USB tehcnology in detai at first, it included the developing background and the advantages of USB,the hierarchical structure including protol,and transmission means of data etc briefly. Afer it give describtion of thefunctions and structure of CMOS image sensor OV7620 and USB interface chip CY7C68013 involved in the system design.later proposed block diagram of the system design and circuit design,Given to connect the various parts of the system circuit.In software segment.Introduced USB interface chip firmware and Application on theuser briefly,thus completing the development and design drivers. Key Word:USB2.0,OV7620,CY7C68013,Firmware,Driver 目录 摘要 I ABSTRACT I 绪论 1 1.1USB2.0线技术发展过程及现状 1 1.2基于USB2.0总线进行数据传输的优点 1 1.3 论文主要研究内容和主要工作 2 第2章 USB2.0协议规范