基于nRF905实现的无线微控制器组网

Wireless microcontroller network communication based on nRF905

本文介绍了一种基于射频收发器nRF905进行无线通信的方法,实现了近距离微控制器的无线组网,并给出了其物理层和媒体接入层的设计方案。在该系统中采用了令牌总线方式的通信协议。拓扑结构方面以自由空间作为传输介质,相当于系统的总线;逻辑上采用令牌结构,以令牌的传递来决定各个微控制器节点的信道使用权。最后以令牌的平均传输周期作为衡量性能的主要指标,对该无线微控制器网络进行了实验和讨论。实验结果表明,该方法可以有效地实现网络中各微控制器节点的无线通信,数据传输稳定。

A method of wireless communication based on radio transceiver nRF905 is introduced to construct a close area witless microcontrollers network. The design scheme of the physical layer and the media acess layer is given. A protocol based on the token-bus is used in the system. Free space is used as the transmission media in topology,which is similer with system bus, and in logic a token is used to decide the media access among the microcontrolers. Lastly the average token transmission period is used as the primary parameter, and some experiments and discussions are made about the witless control network. The result of the experiments shows that the method can effectively complete the witless communications of the microcontroler nodes of the network, and the data transmission is stabilized.