Based On Linux And The Intel Pxa255 Embedded System Design Of Network Communications And Research

The embedded computer is a powerful tool of modern computer technology which can be applied in rebuilding traditional industry and promoting the technical level in many fields. It is widely applied in the terminal of digital language learning. The PXA255 is a high integrate, standard and special system on a chip (SOC) which is produced by the Intel Corporation with a high performance, lower power consumption and a lot of system peripheral equipment. This CPU equipped with memory manage unit (MMU), together with LINUX operation system (OS),is not only easy to accomplish its great function and to lower its price, but can benefit from the free LINUX's characteristics such us multi-user , source code opening, convenience to transplant and so on. And we can run a large quantity of developed and stable applied software and network software on the platform of LINUX OS.In order to establish a embedded system of network communication based on the LINUX and PXA255 CPU, we should first put the hardware and software of system into a suitable state to prepare an accurate environment for calling the operating system. The operating system (OS) of Computers depends on a Boot Loader program when it is booting. Every Boot Loader depends on the different architecture of different types of CPU or depends on the different embedded main-board of the same architecture of CPU .The Boot Loader deeply relies on the hardware to achive. When we initialize the hardware and set up the map of memory, we can take the system of software and hardware into a suitable state in order to prepare an accurate environment for calling the OS. Then the problem about OS running should be solved. Through analyzing the core of the architecture of the Linux system and its principle, I have carefully designed the Boot Loader and monitor program for interaction of human and machines. Consequently, we will compile the Kernel of LINUX embedded OS. Then the kernel of embedded system should be programmed so that the communication device can transport data under the control of OS, which lies a research foundation of the application of LINUX system on the platform. After the system design, we had a test on the evaluation of this embedded system. The result indicates that this design is able to run a well-complied kernel of embedded LINUX system and plays the function of network communication.