多功能电热水器控制器

文档编号:DZXX303  文档字数:12301,页数:27

摘要

 本文以Philips公司的P89LPC935单片机为核心控制元件，辅以温度传感器和PCF8563时钟芯片等外围电路，设计了一款多功能电热水器控制器,具有定时预约加热、设置水温和实时显示功能。
 本文首先介绍了系统的总体组成,然后分硬件与软件两部分进行阐述,硬件中描述了整体结构和各模块的相互关系，介绍了单片时钟/日历芯片PCF8563内部结构及外部特征。软件部分给出了主程序流程图，采用模块化设计思想，在主程序模块下分成若干彼此独立的分模块,然后介绍了抗突发脉冲干扰的数字滤波技术,描述了基本算法,最后对系统进行了总结 。  
 
关键词: 单片机，温度传感器，多功能, 热水器

ABSTRACT

 This paper uses single-chip microcontroller P89LPC935 of PHILPS as the key part , assisting to spread outer circle electric circuits, such as temperature sensor and PCF8563 clock chip...etc., to design a style multi-function electricity water- heater controller which can heat in the fixed time and display time and temperature in real-time.
 This paper introduces firstly the overall composition of the system, and then describes its two parts of hardware and software. The interaction between the whole structure and every module are described in the hardware. For the real-time clock-calendar chip PCF8563, their internal structures and external characteristics are introduced further. The software gives the graph of the procedure flow and adopts module design; several separate sub-modules are divided under the main program module. The digital filter methods are also adopted in order to get rid of the interfere of the random sharp pulses. Then the fundamental algorithm is described. Finally the summary of the system is given.
 
Keywords：single-chip microcomputer, temperature sensor, multi-function, water heater

目   录

摘要 I
ABSTRACT II
第1章 绪 论 1
1.1 背景 1
1.2 研究内容 2
第2章 控制系统的总体方案设计 3
2.2 硬件电路设计 3
2.2.1 芯片特性简介 3
2.2.2 I/O 口特性说明 5
2.2.3 I/O 口配置 6
2.2.4 温度检测电路 6
2.2.5 时钟芯片PCF8563 8
2.2.6 键盘、显示接口电路 10
2.3 软件设计 11
2.3.1 键盘处理及显示子程序 12
2.3.2 时钟芯片PCF8563的读写操作 13
2.3.3 A/D转换程序 14
2.3.4 EEPROM的读写 17
2.3.5 数字滤波 18
2.3.6 利用“看门狗”技术来实现PC的快速自恢复 19
第3章 总 结 21
致  谢 23
参考文献 24

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