Research And Application In Railroad Information Extraction And Record Device Base On Embedded System

With the rapid development of the electronic techniques and the coming of the Micro-controller based upon the technology of VLSI (Very Large Scale Integration), the modern scientific research is brought into a new level. However, the coming of the embedded Micro-controller brings on a new revolution in the modern industrial control. Embedded system is suitable to develop railway information extraction and record device for it has many merits like small size, low cost, low consumption and convenience to maintain.Taking embedded system railway information extraction and record device as the research object, the paper intends to achieve the hardware system of information extraction and record device which is based on ARM (Advanced RISC Machines) embedded processor and to develop information extraction and record device on this basis.I studied in detail the current development of embedded system hardware and embedded operation system, and makes proposal to implement all parts of the embedded system including the selection of ARM embedded processor model and embedded operation system.The paper discussed in length the characteristic, application and structure of ARM embedded processor. In this part, introduced Micro-controller and the key interface circuits between CPU and other key parts are discussed. Besides, i realizd two important module, what is Flash and SDRAM.Based on the general systematic hardwares, the paper expounds the unique and configurable functions of the uClinux-an operation system. The conception and method to port the uClinux system and program the drivers and design the upper applications is expatiated.