单片机的选择和串行通信协议的设计

目前，射频识别技术（RFID）在国外发展非常迅速，该技术被广泛应用于工业自动化、商业自动化、交通监控、高速公路自动收费系统、停车场管理系统等领域。将远距离射频识别技术与无线通信技术、单片机控制技术、计算机串口通信技术结合在一起，为实现体育赛事中径赛记圈自动化提出了系统解决方案。首次将无线通信技术应用于径赛记圈工作中，制定了适合运动场地内信号传送的小型通信网络，并编制了通信协议。该项目的研究可以实现径赛记圈工作的自动化，提高记圈的准确性，因此，该项目的研究切实可行，且应用前景巨大。

Selection of MCU and Design of Serial Communication Protocol

At present, the radio frequency identification （RFID） technology is developing very quickly at abroad and is widely used in industrial automation, business automation, traffic control, automatic highway toll system, car park management system, and other fields. This paper presents a system solution that combines long-distance radio frequency identification technology, wireless commuuicadon technologies, MCU control technology and computer serial port communication technology to realize automatic lap scoring in track events. This is the first time that the wireless communication technology is applied to lap scoring in track events. A small communication network suitable for signal transmission within the grounds for the events is developed and a communication protocol is established. The project can achieve the automation of lap scoring in track events and improve its accuracy as well. Therefore, the project is feasible and has a broad application prospect.