计算机专业毕业设计翻译.doc

题 目:分析与设计基于嵌入式启动加载器的电动助力向系统 Analysis and Design of Boot Loader on Embedded Electric power steering system Abstract Electric power steering systems (EPS) assist the auto turning using the power supplied by electromotor. An EPS based on embedded processor and embedded operating system is developed. In this system, S3C2410X is adopted as CPU and Windows CE 5.0 is selected as RTOS. This paper gives a brief introduction of the hardware platform and the Boot loader. Designing an appropriate boot loader, which is a key step to develop an embedded system, is given in detail. The boot loader, the hinge connects hardware and OS, is made up of OEM startup code and main code mostly. At the same time, some configuration files should be edited, such as sources, makefile and Boot.bib. Validated by experiment, author can run the boot loader in the video surveillance system successfully, it can help to debug the system and download the OS image, and the method described in this text to develop a boot loader is available. 1. Introduction As the EPS system has many merits such as environmental protection, energy saving and safe system, the change from the hydraulic power system to the electric power steering system will be fast. According to the forecast of ABI Research, the EPS global market will be more than 80 billion dollars by 2010, and there is obviously a significant portion which is driven by the china market. Windows CE 5.0, which is an outstanding RTOS, has more market share in wireless communication, industrial control, and consumer electronics. Microsoft releases the Platform Builder development tool and CETK test tool for Windows CE, and provides different reference modules for different CPUs. Now numerous third-part developers provide the PDK (Peripheral Development Kit) for Windows CE. As a result, it is easy and quick to develop with the help of Windows CE. And designing a boot loader with perfect function is the first step and a decisive step to develop a system. Co