带温度显示的电子闹钟设计方案

题目：带温度显示的电子闹钟设计

摘要本文设计了一款利用单片机技术实现带温度显示的电子闹钟。以应用AT89C51 芯片作为核心，利用8 位LED 数码管显示，使用DS1302 实时时钟日历芯片完成时钟/ 日历的基本功能，同时利用DS18B20 温度传感器测量环境温度。这种实现方法的优点是电路简单，性能可靠，实时性好，时间和温度精度高，操作简单，编程容易。

关键词：电子闹钟,温度,AT89C51,DS18B20,DS1302

Abstract

The design determines to use the MCU technology to realize the multi-functional electron clock. This design use AT89C51 as a core chips, 8 LED digital displaying. using DS1302 real-time clock chip to complete the basic function of the clock/calendar.At the same time the design use of DS18B20 temperature sensors is for collecting the environmental temperature. The method has the advantage of being simple circuit, reliable performance, good real-time, high precision of the time and temperature, simply operation, easy programming.

Key words: Electronic clock,Temperature,AT89C51,DS18B20,DS1302

目录

1绪论................................................................ 1...

1.1引言........................................................... 1...

1.2电子时钟研究背景和意义......................................... 1..

1.3论文主要工作概述 ............................................... 1... 2系统设计方案........................................................

2...

2.1带温度显示的电子闹钟系统的总体构成............................. 2.

2.2带温度显示电子闹钟系统的功能...................................

3.. 3系统硬件计..........................................................

4...

3.1主要IC 芯片选择...............................................

4...

3.1.1微处理器选择.............................................

4...

3.1.2芯片DS1302 简介........................................ 5..

3.1.3环境温度传感器........................................... 6..

3.2电子时钟的硬件电路设计........................................ 8..

3.2.1时钟电路设

计..................................... 8...

3.2.2环境温度采集电路设

计.............................. 8..

3.2.3显示电路计............................................... 9...

3.2.4按键电路设

计..................................... 1..0

3.2.5闹铃电路设

计..................................... 1..1

4系统软件设计.......................................................1..2.

4.1主程序计 ..................................................... 1..2.

4.2子程序设计 ...................................................1..2.

4.2.1实时时钟日历子程序设

计............................ 1..2

4.2.2环境温度采集子程序设

计............................ 1..3

4.2.3显示子程序设计.......................................... 1..6

4.2.4闹铃子程序设计......................................... 1..9

5系统调试...........................................................1.9..

5.1硬件调试 .....................................................1..9.

5.1.1单片机基础电路调试..................................... 1..9

5.1.2显示电路调试........................................... 2..0.

5.1.3D S1302 电路调试....................................... 2..0

5.1.4按键电路调试........................................... 2..1.

5.2软件调试 .....................................................2..1.

5.2.1环境温度采集子程序调试................................. 2..1

5.2.2键盘子程序调试......................................... 2..1

6结论...............................................................2..2.. 致谢..................................................................2..3.. 参考文献24