Internet环境下的测控节点设计

Design of data acquisition/control nodes under Internet environment

文章介绍了一种面向Internet的分布式测控系统中的测控节点,该节点基于具有51内核的微处理器ADμC834和以太网控制器RTL8019AS进行设计;介绍了基于ADμC834和RTL8019AS的功能和特点,给出了节点的总体结构和I/O通道的隔离措施;该设计根据8位微处理器本身资源有限的特点,选用了极小型的TCP/IP协议栈uIP,并通过修改和裁减将其移植并嵌入到节点中,实现对Internet的支持。

The paper introduces the design of a data acquisition/control node in Internet-oriented distributed control systems. The design of the node is based on an 8051-cored SOC chip ADμC834 and an Ethernet controller chip RTL8019AS. The main functions and features of the two chips are described. The node circuit configuration and the isolation measures in the design of the I/O channels are presented. To support the Internet environment, the tiny TCP/IP protocol stack uIP is transplanted and embedded into the node by revision and reduction to adapt the limited hardware/software resources.