Embedded Systems In The Mobile Terminal And Implementation

The embedded system is playing the more important role in computing application increasingly in post_PC age. It is defined as the special computer system which is oriented to application, base on computer technology, is apt to select software or hardware and is fit in function and reliability, so the embedded system is usually made up of micro processor, related hardware, embedded operation system, application software, and so on. The embedded system of this paper bases on microprocessor of ARM, the related hardware, peripheral equipments (such as the LCD, FLASH) and the special operation system in wireless communication.In this paper, embedded system will be introduced firstly, including the definition of the embedded system, development and application of microprocessor in embedded system, the category , history and development of the embedded operation system. Architecture of the system will be discussed secondly , including the service of the operation system and the function of all models; The file server system which bases on FLASH is the core model, the paper describes its design purpose , architecture and function. The driver software model, especially on LCD, keyboard will be described too; Finally I will discuss the MMI engine that provides the service for the MMI programmer to complete the menu function.The main contribution of this paper is designing and realizing of a file system that bases on FLASH. The MCC in MMI boosts up expansibility of the software. The separation between handler and driver in DRIVER provides the convenience for second development of software.