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···········································11．2系统方案选择和论证·································11．3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···········································22．1.1系统设计框图································22．1.2系统硬件需求介绍·····························32．2系统硬件各模块作用·································32．2.1单片机核心控制模块···························42．2.2数字温度传感器模块···························42．2.3彩屏显示电路模块·····························52．2.4蜂鸣器电路模块·························52．3系统电路图设计·······································62．3.1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·······································83．1.1DS18B20程序流程图·······························8四、系统测试4．1测试工具·············································94．2软件测试·············································94．3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（RAM），功能强大，适合许多较为复杂的控制应用场合。相比较其他芯片来说比较