摘要：USB是通用串行总线（Universal Serial Bus）的简称，是一种应用在计算机领域的新型接口技术（也越来越多地应用于嵌入式便携设备），是当前最流行的接口技术之一。USB以其卓越的易用性、稳定性、兼容性、扩展性、完备性、网络性和低功耗等诸多优点得到了迅速发展和广泛的应用。
本毕业设计在对USB接口技术原理进行深入的理解的基础上，通过对一套教学演示用传感器套件产品的串口接口改进成USB接口的过程，探讨USB接口技术运用到实际设计过程当中的一种普遍方法。采用PIC16F690控制CH372接口芯片实现USB的批量传输和中断传输，编写基于VC的PC端配套软件读写单片机数据并显示来实现产品的各项功能。
论文包括USB原理介绍，CH372接口芯片的使用，USB设备的软硬件设计以及PC端程序编写思路。对USB接口开发或者对原有设备进行USB升级有一定的作用。
关键词：通用串行总线；USB PIC16F690；接口芯片；CH372
Abstract:Universal Serial Bus (USB) is specified to be an industry-standard extension to the PC architecture with a focus on PC peripherals that enable consumer and business applications. Now, because of the architecture of the USB: Ease-of-use, Low-cost, Multiple Peripherals and Full backward compatibility, USB is full used in the development of PC peripherals.
This graduation design develops the USB port for a kind of teaching product what is used for showing sensors and doing experiment for students in stand of COM port. It’s showed a widespread method of developing the USB port. After having studied the Universal Serial Bus Specification deeply, I have designed this project. The Microchip PIC16F690 controls the USB device IC CH372 to bulk and interrupt Transactions. At the end of design, I programmed a application software with VC++ 6.0 to show the result of sensors and experiment.
This thesis includes Universal Serial Bus Specification, method of CH372, hardware and firmware programmer and the way of developing an application. It is useful for design a USB device or develops the existence device with USB.
Keywords：Universal Serial Bus；USB; PIC16F690；CH372
