多功能电子保姆机的设计与实现.doc

题 目：多功能电子保姆机的设计与实现 —硬件设计 多功能电子保姆机的设计与实现—硬件部分 摘 要关键词：；； Multi-functional electronic nanny Machine Design and Implementation －The Design of the Hardware Abstract With the accelerated pace of life, the demand for nannies society . If a intelligent nanny machine is designed,it will bring more convenience for peoples life.At present, the nanny machine which is on the sale in the market is almost mechanical, has a single function, and controls household appliancescan according to the setting time only through the power.  This paper introduces the research backgroud of the nanny machine and uses the SCM design scheme through comparing 555 design scheme,FPGA design scheme and SCM design scheme. In this paper, the nanny machine ,which is designed through using electron technology,has many functions .It not only can control the Household appliances from time to time, but also can display time,temperature and so on .This design completes the hardware and software of the electronic nanny Machine , debugges a part of functions on the board and realizes the basic function of the electronic nanny Machine. The design uses Atmega128 as a core,controls home appliances from time to time through the work of the relay, completes the basic function of clock / calendar through using the DS1302 real-time clock,measures ambient temperature by using temperature sensor DS18B20, and uses four LED digital tube for displaying .  The machine can be applied to the life and work, can also be modified to improve performance,and can be added new functions so that it brings more convenience to the peoples life and work. Key Word: nanny machine；；temperature sensor；relay； 摘 要 I 第一章 引 言 1 1.1 多功能电子保姆机研究的背景和意义 1 1.2 电子保姆机的功能 2 第二章 电子保姆机设计方案分析 3 2.1 FPGA设计方案 3 2.2 NE555时基电路设计方案 3 2.3 单片机设计方案 4 第三章 基于单片机的电子保姆机硬件设计 6 3.1 单片机的选择 7 3.1.1 AVR单片机简介 7 3.1.2 ATMEGA128特点 7 3.2 时钟日历芯片DS1302 9 3.2.1 DS1302简介 9 3.2.2 DS1302引脚说明 10 3.2.3 DS1302控制字和读写时序说明 10 3.2.4 DS1302片内寄存器 12 3.3环境温度传感器选