毕业论文-51单片机开发板.doc

摘 要 设计一种基于S51单片机的开发板，该开发板具有成本低、体积小、可靠性高、功能齐全、低功耗设计、操作方便等特点。本论文详细介绍了该开发板的开发过程及相关硬件结构和软件设计。开发板以ATMEL公司的AT89S51单片机为核心控制器，板上资源主要包括数据采集处理模块、DS1302时钟模块、通信模块、液晶显示模块、键盘模块等。针对各个硬件模块开发了相应的软件模块，包括各个控制驱动程序、AD/DA程序、RS232/ RS485通信程序、液晶显示程序等。 开发板可以作为主控制模块安装于控制系统中执行控制任务，也可以用作实验板，完成单片机各类通用实验，操作简单，控制结果可见，性价比高，可以应用于高校、科研院所的实验室等场合，具有一定的实用价值和现实意义。 关键词：S51 DS1302 通信 液晶显示 键盘 Abstract Design a development board based on S51 MCU,the board has characteristics of low cost, small size, high reliability, full-featured, low-power design and easy to operate. This paper introduces the development process of the development board and related hardware and software design. Development board using AT89S51 of ATMEL Corporation as core controller, resources on-board include data acquisition and processing module, DS1302 clock module, communication module, LCD module and keyboard module. Design software module corresponding to each hardware module, including the driver and control programs, AD/DA programs, RS232/RS485 communication programs, liquid crystal display programs and so on. Development board can be used as the main control module installed in the control system to perform control tasks, also can be used as experimental board, complete all kinds of universal experiments of MCU, operated simply, control results can be seen,high cost performance, can be applied to universities, research institutes, laboratories and so on, has some practical value and practical significance. Key words: S51 DS1302 communication LCD keypad 摘 要 1 Abstract 2 1 前言 1 2 系统方案 2 2.1 总体设计方案 2 2.2 设计原则 2 3 硬件部分 3 3.1 硬件结构框图 3 3.2 硬件电路设计 4 3.2.1 S51单片机主控制模块 4 3.2.2 键盘模块 4 3.2.3 AD模块 5 a ADC0832简介 5 b 硬件实现 6 3.2.4 DA模块 6 a TLC5615简介 6 b 硬件实现 7 3.2.5 DS1302时钟模块 7 a DS1302简介 7 b 硬件实现 8 3.2.6 测温模块 9 a DS18B20简介 9 b 硬件实现 10 3.2.7 串行通信模块 10 a RS232串行通信模块 10 b RS485串行通信模块 11 3.2.8 显示模块 12 a 数码管模块 12 b LCD1602模块 13 c LCD12864模块 14 3.2.9 下载器模块 16 3.2.10 其他模块 17 4 软件部分 19 4.1 整体程序设计 19 4.2 分模块程序设计 19 4.2.