基于CAN总线的智能微喷灌监控系统中下位机的硬件电路组成与设计

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该文重点阐述了基于CAN总线的智能微喷灌监控系统中下位机（智能节点）的硬件电路组成与设计。从系统功能要求出发,对系统的按键电路、I/O接口电路、时钟电路、数据采集电路、存储电路以及输入输出控制电路等进行方案选择,进而确定系统的总体结构,并按成本核算、可靠程度、功耗等设计原则,分别设计基于STC89C52微处理器和SJA1000芯片的CAN总线适配控制器的数据采集的模块、控制执行模块和数据处理模块的硬件系统。

This article expounds the CAN bus based intelligent monitor and control system for micro spray irrigation（lower machine（intelligent node） composition and design of hardware circuit.Set out from the system function requirement,the system of key circuit,I/O interface circuit,clock circuit,data acquisition circuit,storage circuit and I/O control circuit of scheme selection,and then determine the overall structure of system,and according to the cost accounting,reliability,power consumption,such as design principles,design based on STC89C52 microprocessor and SJA1000 chips CAN bus adapter controller of the data acquisition module,control module and data processing module of the hardware system.