基于单片机的红外遥控电子钟设计1 - 图文

河南科技大学毕业设计（论文）

基于单片机的红外遥控电子钟设计

摘 要

本设计主要是先对红外遥控电子钟进行系统方案的设计，进而进行系统硬件（电路图）以及系统软件（程序）两个方面的设计。使其具有显示年、月、日、时、分、秒的基本功能之外，还具有温度显示功能、整点报时功能、闹钟功能和红外遥控控制功能。

在本设计中首先选用文献法，查找有关红外遥控电子钟设计的资料，了解此次设计中可以应用到的各种单片机、电子时钟芯片和温度采集模块等等；然后选用比较法，针对此次设计的要求，逐一进行比较，分析选用不同单片机、电子时钟芯片和温度采集模块应用时的优缺点，选用优点最多，缺点最少的单片机、电子时钟芯片和温度采集模块；最后选用实验法进行设计方案的决定。

最终确定本设计的产品是基于DS1302时钟芯片和DS18B20温度传感器并用红外遥控进行设置的电子钟温度计，以STC89C54单片机为控制核心，并用1602液晶显示作为人机交互界面。可以对周围环境温度进行实时监测，还可以利用红外遥控进行闹钟的设定和时间的调整。

本次基于单片机设计的红外遥控电子钟与传统的机械钟相比，更具有走时准确、显示直观、性能稳定、携带方便、无机械传动装置等优点，因而得到广泛应用。

关 键 词：温度计，电子钟，DS1302，DS18B20，红外遥控

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河南科技大学毕业设计（论文）

THE DESIGN OF INFRARED REMORE CONTROL

CLOCK BASED ON MCU

ABSTRACT

This design is mainly to design the system solution of the infrared remote control clock first.Then design the system hardware (circuit diagram) and system software (program).To make it not only has the function of showing year month date hour minute second,but also has the function of showing temperature,telling the time,alarming and remote controlling by infrared.

In this design first use literature method,to search the material about the infrared remote control clock,and understand all kinds of MCU,electronic clock chips and temperature collection modules which will use in this design.Second use comparison method,to compare each of them based on the requirement of the design.Analysis the advantages and disadvantages of each MCU,electronic clock chips and temperature collection modules if it is used in this design,then choose the MCU,electronic clock chips and temperature collection modules which has more advantages and less disadvantages.Last use experiment method to decide the design solution.

This product is electronic clock and thermometer which can be set by users and based on the real time clock chip DS1302 and the temperature sensor chip DS18B20.And the product use STC89C54 to be its MCU and use 1602 to be its human machine interface.This system can detect the temperature of the environment in real time,and it can be modified the time and set the alarm clock by infrared remote controller.

The infrared remote control clock based on MCU has a lot of advantages compared with the traditional mechanical clock,for example the time is

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河南科技大学毕业设计（论文）

accurate,its showing is intuitive,its stable performance,it is easy to carry and there is no mechanical transmission device.So it is used widely.

KEY WORDS：thermomter,electronic clock,DS1302,DS18B20,infrared remote controller

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河南科技大学毕业设计（论文）

目 录

前 言 ................................................................................................ 1 第一章 系统总体方案设计 ............................................................... 3 §1.1 系统的设计功能 ................................... 3 §1.2 方案的选择与比较 ................................. 3 §1.2.1 系统的基本方案选择 ............................ 3 §1.2.2 单片机的选择 .................................. 3 §1.2.3 时钟芯片的选择 ................................ 4 §1.2.4 温度采集模块的选择 ............................ 5 §1.2.5 显示模块的选择 ................................ 5 §1.2.6 红外发射接收模块的选择 ........................ 5 §1.2.7 电源模块的选择 ................................ 5 §1.2.8 声光报警模块的选择 ............................ 6 §1.3 系统的总体设计方案 ............................... 6 第二章 系统硬件设计 ....................................................................... 7 §2.1 单片机控制模块 ................................... 7 §2.1.1 STC89C54单片机的简介 ........................ 7 §2.1.2 时钟电路的设计 ................................ 8 §2.1.3 复位电路的设计 ................................ 9 §2.2 时钟芯片DS1302模块 ............................. 9 §2.2.1 DS1302简介 ................................... 9 §2.2.2 DS1302的工作原理 ............................ 10 §2.2.3 DS1302的应用 ................................ 10 §2.3 温度采集DS18B20模块 ........................... 11 §2.3.1 DS18B20简介 ................................ 11 §2.3.2 DS18B20的主要特征 .......................... 12 §2.3.3 DS18B20的应用 .............................. 12 §2.4 液晶显示屏LCD1602模块 ......................... 12

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