文档介绍：本科毕业设计(论文)
题目: USB接口的设计
2007年 6 月
USB接口的设计
摘要:USB即通用串行总线(Universal Serial Bus),是一种高传输速率的串行接口总线,具有非常广阔的应用前景。
本文研究了利用USB总线进行数据传输的几个重要方面:外部设备的硬件组成和外设与主机的连接、配置,并给出PC机上的设备驱动程序和用于验证数据传输过程的应用程序。具体研究内容如下:
研究了USB总线的原理和规范,并掌握了数据传输机制和总线工作方式。USB设备都可以归结为控制器和USB电气接口这两个基本部分的组合。在设计中,采用的控制器是51单片机AT89C51,USB电气接口则是PHILIPS公司的USB接口芯片PDIUSBD12。
接着介绍了系统软件的具体实现,包括固件程序,系统驱动程序和应用程序的设计实现。这一部分重点阐述了系统固件的实现,以及如何运用软件工具Win Driver开发系统驱动和应用程序;论文最后一部分讲述了系统的调试过程,包括硬件测试和在Win Driver环境下的系统调试,以及在调试过程遇到的问题和解决方法。
关键词:USB;单片机系统;PDIUSBD12;数据传输;外部设备
The design of USB’s connection
Abstract :Universal Serial Bus(USB) is a kind of the serial buses with high speed on transmitting which will be wildly used in the future.
This paper discusses some important aspects of the method of data transmitting: the hardware constituting the peripheral, the connecting and configuring between peripheral and PC. Introducing the device driver on PC and the application program is being used to illuminate the progress of transmitting data through USB. The specific content of studying is as following.
This paper is to study the theory and the specification of USB, and master its mechanism of data transmitting and the method on which the bus works. In later chapters, we can see, all the USB apparatus e down to two basic association of part: a controller and a USB electric interface. In this system, I adopted 51 one-puter AT89C51 as its controller, the chip PDIUSBD12 of pany as its electric interface.
The following part mended the software of the system, including the design of firmware program, driver and employ program. This chapter will emphasize in describing the design of firmware.
Key words:USB;single-puter system;PDIUSBD12;data transmitting peripheral
目录
摘要 I
ABSTRACT II
1 绪论 1
课题研究的目的和意义 1
USB的发展历程 2
3
4
USB的应用与前景 5
主要研究内容 6
2 USB通用串行总线的规范及基本原理 7
引言 7
USB总线体系结构 7
总线拓扑结构 7
USB的通信模型 8
数据流 8
USB硬件结构 9
USB软件结构 10