摘  要
本系统是关于USB实时数据传输的，USB是现在数据传输的重要技术，具有灵活，成本低，性能可*，热拔插，节省系统资源等优点，整个系统可以分为六个模块来完成，数据采集模块，键盘控制模块，单片机部分，USB模组，PC机部分，还有一个选作部分就是语音播报部分。
本论文的第二章讲述了USB接口协议的基本知识，有USB总线的拓扑结构（它是一种分层的菊花链结构），USB的物理层，USB设备与主机，USB所拥有的四种数据传输方式：控制传输、同步传输、中断传输、块(批)传输，最后介绍了USB的总线协议，分别介绍了批操作、控制操作、中断操作与同步操作的格式，还讲述了数据同步与重试、错误检验与恢复等知识。
第三章论述了本设计的系统硬件设计。首先从硬件整体上来讲述，把整个系统分为六部分，随后分别介绍了各个硬件部分的设计。单片机的选择：在本设计中选择凌阳单片机来完成控制功能，它具有很高的性价比和良好的语音功能；7路电压输入电路：在单片机SPCE061A内部有8路的AD转换电路，需要将产生7路电压输入到单片机内；小键盘电路：起到控制数据采集与停止的功能；USB模组电路：芯片选择Philips公司的PDIUSBD12，设计了USB模组的硬件电路以及与单片机的连接方式。
第四章论述了本设计的系统软件设计。这是本设计的难点，可以将软件分为两部分：单片机端的软件设计与PC机端的软件设计，单片机端程序涉及到AD转换程序，键盘扫描程序，单片机控制程序等；PC机端程序涉及到USB驱动程序与用户服务程序两部分，后介绍了编写PC机端程序的操作流程。
第五章论述了系统的调试，讲述了所需要的调试环境，各个电路模块在调试中要注意的问题及解决方法。
关键词：USB；数据传输
 
ABSTRACT
This system is to deliver data in USB, it is an important technique that now uses in data delivering, having vivid, low cost, dependable function, pulling or putting when the PC is working and saving the system resources etc. advantages. The whole system can be divided into six molds pieces to complete: the data collecting mold piece, keyboard controlling mold piece, the single machine part, the module of USB, PC machine part, still having a choosing part called the module of reporting speech.
Introduced in the second part of this thesis is the basic knowledge of USB, this part concerns the basic construct of USB (it is the chrysanthemum chain construction of a kind of layering), USB physics layer, the equipments of USB and host, the four kinds of data delivering methods: The control delivering, the synchronously delivering, the breaking off delivering, a total line for delivering. Finally I introduce the format of control operation, the breaking off operation and the synchronous operation respectively, still relate the data synchronous and try again, the knowledge of mistake examining and recovering.
In the third part I discuss the hardware design of the system. First I discuss the whole structure. It is divided into six parts, The choice of the single machine: I choose the single machine of lingyang to complete the function of controlling in this item, it has the very high price ratio to function and has the good speech function; electric voltages input in the electric circuit: The SPCE061A inner part has the AD conversion electric circuit; The small keyboard electric circuit: having the function of controlling data collection and ceasing; The USB module electric circuit: I choose the PDIUSBD12 of Philips company, design the electric circuit of the module of USB and the connection with the single machine.
Discussed the system software design of this item in the fourth part. This design is very difficult, I divide the software into two parts: The software of the single machine and the software in PC. The software of the single machine involves the procedure of the AD converting, the procedure of the keyboard scanning, the control procedure of the single machine etc; The PC software involves the procedure of the USB driving and the customer service procedure.
The fifth part of this thesis is about the debugging of this system. It is mainly about the problems we should pay attention to and the ways to solve them.
Key words: USB; data delivering
 
目  录
第1章 绪论 1
  1.1　论文写作的背景 1
  1.2  论文写作的目的及意义 1
  1.3  本系统研究的方法 2
第2章 USB接口协议 4
  2.1　总线拓扑结构与USB的物理层 4
  2.2  USB设备 5
   2.2.1  Hub与设备的即插即用 6
   2.2.2  设备的电源与设备的挂起 7
  2.3  USB数据传输 8
  2.4  USB总线协议 10
   2.4.1　域的类型和包的类型 10
   2.4.2　总线操作的格式 13
   2.4.3　数据触发同步与重试 14
  2.5 本章小结 16
第3章 系统硬件设计 17
  3.1 整体硬件设计 17
  3.2 各部分硬件设计说明 17
  &nb

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