毕业设计说明书基于 CH341A 的计算机与单片机通信技术讨论学生姓名： 学号： 学 院： 专 业： 指导老师： 2025 年 6 月基于 CH341A 的计算机与单片机通信技术讨论摘要通用串行总线 USB 是 PC 体系中的一套全新的工业标准。通用串行总线(Universal Serial Bus，USB)凭借其价格低廉、使用简单、协议灵活、接口标准化和易于端口扩 展等优点，迅速占领了计算机外设接口领域的统治地位,它的应用已非常广泛。本课题的主要讨论内容是：掌握 USB 通信协议及器件工作方式、利用 AT89C51 单片机控制 CH341A 接口芯片及周边电路、设计接口电路，最终通过 USB 接口实现单片机与计算机之间的串行通信。本课题使用的 USB 接口芯片是南京沁恒电子公司的 CH341A，所使用的驱动是用南京沁恒电子公司提供的驱动程序，完全保证了软硬件的可靠性、兼容性。关键词: USB 接口，CH341A，串行通信，AT89C51Research Based on the CH341A the Computer Communicate with the MicrocontrollerAbstractThe Universal Serial Bus (USB) is specified to be an industry standard extension to the PC architecture. For the advantages of low cost，easy to use，protocol flexible，interface standardization and port easy to expand ， USB (Universal Serial Bus) occupies the Predominant Position in the region of computer peripheral interface. It has become increasingly widespread in application.The main content of our task is:Study the specification of USB and master the way of how USB device works; use singlechip AT89C51 to handle CH341A and other chips; design the interface circuit and firmware, and finally realize Serial communication between the USB interface and the host operated on Windows though the USB cable.The USB controller we select is CH341A that is produced by Nanjing Qin constant company and the driver we installed is offered by Nanjing Qin constant company. So both the software and the hardware of the project is reliable and has good compatibility.Key words: USB interface ...
