Design and implementation of platform for embedded Ethernet control system

A platform named EMECS based on embedded Ethernet control system is implemented. A PC running Fedora 6 (Linux2.6) works as a central controller. A kit running Linux 2.4 based on Samsung2410A (ARM920t core) works as a remote controller and a DC motor (ESCA P28HSL18-219/204) made by Portescap Company works as a plant. Firstly, system modeling is presented by analyzing the characteristics of Ethernet and the plant, based on a proposed delay measurement method. Secondly, implementation of the system including program and hardware is described in detail. And then the delay is measured and the control results of the system are tested in three cases with different network loads as well. The platform is proved to have flexibility of running different control algorithms and extensibility of adding nodes. Experiment results demonstrate the validity of the system.