毕业设计：基于单片机的GPS定位系统硬件设计.docVIP

基于单片机的GPS定位系统硬件设计 电子信息工程专业 [关键词] 单片机；GPS接收机；看门狗；液晶显示模块 The Hardware Design of GPS Position Information Processing System Based on Single Chip Computer Electronic Information?Engineering Specialty LI Shu-ge Abstract: The design of GPS position information processing system based on single chip computer is introduced. This system employs ATMEL’S AT89C51 as a core controller, communicating with GPS module(C3-370B) in serials port, receives NMEA-0183 standard formed navigating data output from GPS module, among which GPRMC is selected to acquire geological information and timing information. Finally the acquired geological information and timing information are displayed on the display terminal after proper data processing such as time difference correction. After debugging, this system can receive GPS position information and time information, can meanwhile display longitude, latitude and time. The system mainly consists of GPS module, watchdog and EEPROM module, LCD module and keyboard module, with the design ideas of use AT89C51 to control each module. This paper studies each module one by one, a comprehensive and detailed exposition of the hardware circuit design is given, while the principles and functions of the various modules are discussed in detail. Key words: Single chip computer;GPS receiver;watchdog;LCD module 目 录 1 引言 1 1.1 课题的背景及意义 1 1.2 GPS的发展历程 1 1.3 本设计的主要内容 2 2 GPS系统的构成和工作原理 3 2.1 概述 3 2.2 GPS系统的构成 3 2.3 GPS系统的工作原理 4 3 总体电路的设计 4 3.1 总体硬件设计 5 3.2 AT89C51单片机 6 4 各模块硬件设计 6 4.1 键盘电路设计 6 4.2 看门狗电路设计 7 4.2.1 X5045芯片 7 4.2.2 X5045工作原理 8 4.2.3 X5045电路设计 8 4.3 液晶显示模块设计 9 4.3.1 TS12864A1 9 4.3.2 TS12864A1基本特性 10 4.3.3 TS12864A1电路设计 10 4.4 GPS模块硬件设计 12 4.4.1 C3-370B 12 4.4.2 C3-370B的工作原理 12 4.4.3 C3-370B电路设计 12 4.5 系统电源设计 13 4.5.1 LM7805 13 4.5.2 稳压电路设计 13 5 系统实现 14 5.1 系统开发所需的