測控系統性能的優劣是溫室作物優質、高產、高效栽培的關鍵。針對當前溫室測控系統中需要解決的各種問題——降低成本、降低功耗、提高抗干擾能力、提高實時性和通信速率，提出了CAN總線在基于微控制器MC68S08QG8的測控系統中的應用，詳細介紹了單個智能節點的硬件設計和軟件實現，設計了簡單的CAN總線應用層協議。運行結果表明該系統結構簡單、可靠性高、實時性強。

　　Abstract:

　　Measurement and control system performance is key to greenhouse crop high quality， high yield and efficient cultivation. In view of the current greenhouse measurement and control system needs to solve the problems， reducing cost， reducing power consumption， improving anti-jamming capability， improving real-time and communication. The paper proposed application of CAN bus based on microcontroller MC68S08QG8 measurement as communication profile， and introduced a single intelligent node of the hardware design and software realization in detail. A simple CAN application layer protocol was designed. The running result shows that the system has performances of simple structure， high reliability and strong real-time.