目录摘要.......................................................ABSTRACT....................................................0引言.......................................................1绪论....................................................1.1CAN总线特点及国内外应用现状.............................1.2课题的提出和解决.........................................1.3课题的主要任务...........................................2系统总体方案设计..........................................2.1概述.....................................................2.2方案选择................................................2.2.1单片机选型............................................2.2.2温湿度传感器选型......................................2.2.3总线控制器选型.........................................2.3系统组成总体结构........................................3硬件设计..................................................3.1单片机最小系统..........................................3.2温度检测电路............................................3.4键盘电路.................................................3.5显示电路.................................................3.6CAN接口电路..............................................3.6.1总线控制器............................................3.6.3CAN收发器.............................................4软件设计..................................................4.1.2下位机通信模式........................................4.2主程序流程图............................................4.3MCP2515初始化程序流程图.................................结论......................................................参考文献....................................................摘要针对以往温室内变量检测劳动强度大、精度低、范围小的现象，本文应用温度和湿度传感器，提出了基于CAN总线的温湿度测控系统设计方案。本设计详细分析了基于CAN总线的温湿度检测和系统的通信原理，设计了单片机最小系统、CAN通信接口电路、温湿度传感器电路、键盘电路、显示电路和报警电路等模块。基于CAN总线的温湿度测控系统实现了温湿度的检测和实时显示，并可以与其它节点通信以便于温室内大范围的温湿度监测和控制，节点结构简单，便于拓展，降低了劳动强度，提高系统的实时性和可靠性。关键词：CAN总线；单片机；温湿度检测；通信接口DesignofGreenhouseEnvironmentMonitoringSystemBasedonCANBusABSTRACTForthevariabledetectionoflaborwithinthepastgreenhouseintensity,lowaccuracy,asmallrangeofphenomena,thispaper,temperatureandhumiditysensors,temperatureandhumiditymonitoringandcontrolsystemdesignbasedontheCANbus.Thisdesign,adetailedanalysisofthetemperatureandhumiditytestingandsystemsbasedonCANbuscommunicationtheory,thesmallestsingle-chipsystem,CANcommunicationsinterfacecircuits,thetemperaturesensorcircuit,thehumiditysensorcircuit,thekeyboardcircuit,displaycircuit,andalarmcircuitmodule.Detectionandreal-timedisplayoftemperatureandhumidity,temperatureandhumiditymonitoringandcontrolsystembasedonCANbusandcancommunicatewithothernodesinthegreenhousesothatawiderangeoftemperatureandhumiditymonitoringandcontrol,thenodestructureissimple,easytoexpand,reducelaborintensityandimprovethereal-timeandreliabilityofthesystem.Keywords:CANbus，microcontroller，temperatureandhumiditytesting，communicationinterface基于CAN总线的温室环境监测系统设计张春林02120929190引言20世纪80年代末、90年代初兴起的现场总线技术引发了工业自动化领域的重大变革，它代表着工业控制网络技术的发展方向。现场总线控制系统(FCS)将集散式控...
