The Research Of Embedded Internet System Based On ARM

Along with the dramatic development of the computer network technology and the electronic technology, the world is stepping into Post-PC era filled with a lot of opportunities. In this period, the embedded Internet system will be a driver of the development of computer technology. Additionally, it will be hot field of IT industry in the next few years, while will be the future of embedded system.The thesis introduced the prospect of embedded system firstly, and analyzed the state of the art from the software and hardware. The analysis results indicate that the support of embedded operation system is the desideration of embedded software development, the hardware kernel based on 32 bit RISC embedded processor is the inevitable development trend, and communication with Internet is an inner urge of embedded system function. Take above-mentioned three facts into consideration, the thesis adopted a realizing scheme of embedded Internet by ARM processor S3C4510B as the hardware platform, the RTOS uC/OS-II as the software platform and the lwIP as TCP/IP stack.Secondly, the thesis discussed the scheme from three aspects, which are the design of the startup code, the transplant of RTOS and the realization of communication function.The system memory map and the exception/interrupt design are the main task of the first aspect. uC/OS-II is modified reasonably, the task stack and interrupt task switching function are designed in the second aspect, then uC/OS-II is transplanted on S3C4510B and runs steadily. The main tasks of the third aspect are the transplant of lwIP and the design of network device drive referred to the template supported by lwIP.Finally, the experimental testing has been carried through, the result indicated that every item of TCP/IP could work normally, and then the basic system of the scheme is proved accurately.