基于单片机的温度检测报警与万年历系统设计 大学学位论文.doc

单 片 机 课 程 设 计 基于单片机的温度检测报警与万年历系统 目录 摘要······················································· 1 设计要求与方案论证 1．1设计要求··········································· 1 1．2系统方案选择和论证································· 1 1．3电路最终方案确定··································· 1 二、电子万年历与温度采集报警硬件设计和实现 2．1系统设计··········································· 2 2．1.1系统设计框图································ 2 2．1.2系统硬件需求介绍····························· 3 2．2系统硬件各模块作用································· 3 2．2.1单片机核心控制模块··························· 4 2．2.2数字温度传感器模块···························4 2．2.3彩屏显示电路模块····························· 5 2．2.4蜂鸣器电路模块 ·························5 2．3系统电路图设计·······································6 2．3.1系统电路原理框图和原理图······················7 三、软件设计与分析 3．1系统软件流程图·······································8 3．1.1DS18B20程序流程图·······························8 四、系统测试 4．1测试工具·············································9 4．2软件测试·············································9 4．3硬件测试·············································10 参考文献·····················································11 附录一：程序清单·············································12 附录二：PCB电路图············································13 基于单片机的温度检测报警与万年历系统 摘要 温度检测报警系统也是在日常生活和工业应用非常广泛的工具，能实时采集周围的温度信息进行显示，程序内部设定有报警上下限，根据应用环境不同可设定不同的报警上下限。 此系统是基于STC89C52单片机设计的，包含液晶显示模块， DS18B20温度采集模块，键盘扫描模块，报警模块。STC89C52作为控制核心，具有功耗低，功能强等特点，电压可选3到5V电源供电。显示模块采用彩屏动态显示，对于显示数字、字母和汉字最为合适，而且与单片机连线简单，占用IO口相对较少。温度检测报警模块采用数字式温度传感器DS18B20，该芯片具有精度高，测量范围广等优点，易与单片机连接，模块电路组成简单并同时具有温度报警功能。 关键词：STC89C52， DS18B20，彩屏显示，采集周围设备温度、温度报警 一、设计要求与方案论证 1．1设计要求 1.1.1 实时温度检测并显示 1.1.2 具有时间调节设置功能，以及时间预设报警、温度报警等功能。 1.1.3 可以保存上次设定的报警温度及报警方式。 1．2系统方案选择和论证 STC89C52单片机作为核心控制体，该单片机具有高可靠，超低价，低功耗，无法解密等优点。该单片机属于双列直插式封装的PDI40口管脚。具有4个输入输出端口，分别为PORT0,PROT1,PROT2,PROT3，其中P0口是一组8位漏极开路型双向IO口，校验时，要求接上拉电阻。其他三个内部有30K的电阻，所以不用再外接电阻。此单片机具有6个中断，其中包括三个定时器中断，二个外部中断，一个串口中断，为全双工通信口。内部有静态非易失EEPROM和看门狗。片内含8Kbbytes的可反复檫写的只读程序存储器（PEROM）和256bytes的随机存取数据存储器