面向LonWorks网络的嵌入式Web服务器设计与实现

通过所设计的面向LonWorks网络的嵌入式Web服务器,用户可以在管理信息网络中以Web方式实现对LonWorks网络内的设备和数据的访问。给出了系统的整体实现方案。在硬件设计中,利用SX52单片机和RTL8019AS以太网控制芯片实现服务器与信息网络的接口,利用Neuron3150神经元芯片作为服务器与LonWorks网络的接口,两者通过并口以主从方式交换数据。在软件设计中,针对嵌入式系统的特点,对TCP/IP协议进行了裁剪,通过B/S模式和套接字编程相结合的Web访问方式,减轻了服务器的负担;对于2个网络之间的数据交换,给出了基于虚拟令牌传递协议的软件实现方法。该装置在实际工程中的应用表明,其运行稳定可靠。

Design and implementation of embedded Web server for LonWorks

With the designed embedded Web server for LonWorks,user can access the equipment and data in LonWorks network from management information network through Web.The system scheme is introduced.The interface between server and information network is implemented by SX 52 and RTL8019AS,while the interface between server and LonWorks by Neuron 3150,in which data exchange between them is through parallel port in slave-master mode.According to the feature of embedded system,the TCP / IP protocol stack is simplified in the solution,and an accessing method combining B / S mode and Socket programming is proposed,which reduces the load of Web server.As for the data exchange,the virtual token exchange protocol is proposed for software realization.Its application in practice shows that it works stably and reliably.