双向防盗器设计【摘要】随着人们生活水平的提高，汽车已逐步进入家庭，对汽车防盗的要求越来越高，并且无线技术的不断进展，使得防盗系统的设计更加灵活、安全、方便、可靠。本文主要介绍基于 LPC930 单片机和 TDA5255 无线收发模块设计的双向汽车防盗系统，分遥控器和主机设计两部分。遥控器和主机进行半双工的通信，遥控器控制主机的状态，包括设防 、解除、寻车、开尾门等，还具有与主机同步报警的功能；主机能够检测多个触发源自动报警并且同步通知遥控器，能根据遥控器的设定执行相应的功能，还具有自动上下锁、中控锁自动化、自动恢复、紧急解除等功能。自定义无线通信协议，协议数据采纳 PWM 编码，使用 FSK 调制和解调方式。软件实现采纳 C 语言编程和 Keil 编译环境。【关键词】 LPC930、TDA5255、PWM、FSK 调制和解调【 Abstract 】 With the improvement of people’s living standard, private cars have gradually stepped into more and more common families, and as a result, people have been more and more concerned with effective vehicle guarding-against-theft systems; and at the same time, with the continuous development of wireless technology, this kind of systems have become much more flexible, convenient, reliable and safer. This article introduces a design of a bi-directional vehicle guarding-against-theft system, which is based upon MCU LPC930 and radio transmission and reception module TDA5255, and the design is made up of two main parts: the remote controller and the mainframe. The communication between the remote controller and the mainframe is by means of half-duplex data transmission, and the states of the mainframe controlled by the controller include setting up and release from defense, seeking cars, opening the back door of cars and it also can give an alarm simultaneous with the mainframe; and the mainframe can detect couples of triggered sources, give an alarm and inform the controller simultaneously, and also, it can...
