Hardware software system design of a generic embedded controller for industrial applications

The paper deals with system design of an industrial controller with an embedded microcontroller. The controller's application could be customized for any specific needs. The paper dwells on the system's architecture, system hardware design and the customized software design relevant to the controller's functionality. The paper illustrates the customization of the generic controller for a specific task. The system monitors ambient temperature and then registers it on the LCD display. The system annunciates the ambient temperature in a synthesized voice. The paper demonstrates how the customized functionality is achieved in software and then ported into the controller. The systems software is designed through a program written in C language with embedded assembly language as and when needed. This software development methodology provides a structured programming environment which leads to modularity and lends portability to the code.