基于低功耗单片机温度设计.doc

基于低功耗单片机温度计设计(电路图+原理图+流程图)-论文  基于低功耗单片机温度计设计(电路图+原理图+流程图)ABSTRACTThe paper introduced a kind of a new digital thermometer which take the Micro Controller Unit as the primary control component and take DS18B20 as the temperature sensor.???????? The paper is mainly consist of the design of the hardware electric circuit and the design of the system program. The hardware electric circuit mainly include the master controller, the temperature measured electric circuit and the display circuit and so on, the system take Microcontroller Unit AT89C52 as its master controller, and DS18B20 as the its temperature sensor, which is produced by the American DALLAS company, and anodes LED numerical code tube is mainly part of the display circuit .The system program mainly included the master routine, the read-out temperature subroutine, the temperature transformation order subroutine, the calculated temperature subroutine, demonstrated the data renovates subroutine and so on. In addition, the system debugging and the performance analysis is also involved in this paper.Keywords:? temperature sensor, DS18B20, AT89C52, display circuit, digital thermometer摘? 要本设计介绍了一种以单片机为主要控制器件，以DS18B20为温度传感器的新型数字温度计。主要包括硬件电路的设计和系统程序的设计。硬件电路主要包括主控制器，测温电路和显示电路等，主控制器采用单片机AT89S52，温度传感器采用美国DALLAS半导体公司生产的DS18B20，显示电路采用4位共阳极LED数码管以动态扫描法直读显示。系统程序主要包括主程序，读出温度子程序，温度转换命令子程序，计算温度子程序，显示数据刷新子程序等。此外，还介绍了系统的调试和性能分析。关键词： 温度传感器，DS18B20，AT89S52，显示电路,数字温度计目录插图清单……………………………………………………………………………………1表格清单……………………………………………………………………………………2引言…………………………………………………………………………………………3第1章?系统方案的论证与比较……………………………………………………………4第2章 硬件电路的设计……………………………………………………………………62.1 向通道的设计…………………………………………………………………………62.2 片机的选择及其接口电路的设计……………………………………………………102.2.1 片机的选择…………………………………………………………………………102.2.2显示电路的设计……………………………………………………………………202.2.3 按键及报警电路的设计……………………………………………………………232.3后向通道的设计………………………………………………………………………25第3章 系统软件的设计…………………………………………………………………273.1系统主程序的设计……………………………………………………………………283.2 温度子程序……………………………………………………………………………293.3按键处理