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Research of Vehicle _navigation System Based on Embedded Linux

Author: ChenLing
Tutor: LiBing
School: West China University
Course: Computer Software and Theory
Keywords: Embedded system Vehicle_navigation Drivers Linux ARM
CLC: TN966
Type: Master's thesis
Year: 2009
Downloads: 213
Quote: 3
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Abstract


In recent years, with the rapid development of social-economic, the complexity and congestion of road traffic increase steadily. The existing traffic management and services can not meet the demand for transportation. Urban intelligent transport system has been developed rapidly, and the Intelligent Transportation Systems emerge as the times requires. As an important component of Intelligent Transportation System, vehicle-navigation system has become the research hot spots. At the same time, the needs of the market also bought on the vehicle-navigation system technical study in depth and universality.This paper analyzes the technical feasibility of this system based on the research of its background significance and its development status quo. In this paper, the concept, software and hardware environment as well as project development process of embedded system were introduced, according to the current domestic and international vehicle-navigation system research and development, and with the software and hardware development platform of ARM microprocessor and embedded Linux, a basic function module and the overall structure of the system are designed to meet the system functional requirements.According to the system design, this paper described the system in detail from hardware and software aspects. in terms of hardware, based on the current advanced ARM microprocessor, using Samsung’s 16/32-bit RISC processor of ARM9 series chip S3C2410X as the system center, described in details of chip reset, memory distribution and control mechanisms. In terms of software development, using embed Linux operating system as the platform, in the establishment of the cross-compiler environment, it completed the bootloader and file system design and migration, as well as the configuration and migration of the kernel . Then, it developed drivers for special equipment of the vehicle-navigation system and accomplished LCD driver, which made the system show on a good platform.This thesis focused on the overall system design and software design, especially in building the file system. Considering the increase of complexity of embedded system and the expansion of storage capacity, embedded file system is an inevitable trend. File system makes the embedded system be managed, developed and migrated easier, so this thesis focuses on the file system. In order to overcome the single file system on the impact of the limitations of system performance and owing to the scarcity of hardware resources and vehicle-navigation system need high-capacity data storage resources of the map features, combined with a wide range of Linux file system support and through a virtual file system interface to provide ease, using building a multi-file system methods, design mixed Cramfs and YAFFS file system and make the YAFFS as the root file system, at the same time, using Tmpfs as assort case. Make full use of the advantages of the differern file system, and effective use of the system’s storage resources.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio navigation > Navigation systems of the various institutional
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