Embedded Application Research Based On ARM9 And Linux

Embedded system is a specialed computer system suting for the application with the strict request for the function, the reliability, the cost, the volume, the power loss, which is with the application as center, the computer as the foundation, and hardware and software cutting out.It is generally composed of the embedded micro controller, the periphery hardware devices, embedded operating system, and user's application 4 parts, which is used to control, supervise or manage other devices. It has been used in the fields of control, consumer electronic product and etc, and one of the most important research aspect of the electron field.Embedded linux possesses great application value, so it had been the hotspot of information technology research and is widely used in information appliance, communication device, industry control.but embedded linux has deficiency caused by GNU, so there is great challenge in applying it on a special hardware device. This paper implements an embedded linux on the platform centered with AT91RM9200 and discusses the process of porting linux and key issues faced in development.Firstly, the thesis summarizes the characters of arm and embedded linux; Secondly, presents the hardware design of developing platform in detail; Thirdly, on the base of hardware platform, tells of the process of developing linux and work needed to do porting linux to a special platform,including porting U-Boot, compiling and trimming liuux kernel, making filesystem, design of linux drivers in detail; Finally, introducing a SD card graphical application based on this platform,which was used to validate the platform, the result is successful.