Key Technologies Research Of Configuration Software Network Interface On Embedded Linux

With the rapid development of computer technology, the embedded system has extended application gradually in various fields. However, the configuration software which has been successfully applied in industrial control can not directly deploy on embedded platform and with the prevalence of Internet, so it's becoming necessary to connect the embedded devices to Internet. The Embedded Web Technology changes the system architecture of former monitoring system, which satisfies the request of expansibility, real time and distribution in current monitoring system. It is one of the most simple and practical choices to monitor embedded devices remotely using Web Technology. So it's a compelling trend to combine the embedded and configuration software with Web technology in the field of industrial control.Firstly this thesis provides the general framework of configuration software for Embedded Linux System according to the features of embedded system and borrowing ideas from the conventional configuration software's function and structure. Development environment is built with Qt tool on Linux platform, and then it is tested for the operation on embedded devices. Subsequently, it's introduced the building of the software development environment of Embedded Linux System based on Intel PXA255 processor. It is the groundwork for the development and test of application programming. In this development environment, it's analyzed about network communication in embedded Linux configuration software. And the Web server for the embedded system is built with the single task HTTP server Boa, which is widely applied in the embedded system. The use of B/S network structure can access the Internet directly. It is researched deeply on Socket program on Linux platform, the transplant and realization of the embedded Web server, the interface machanism of database and the development process of CGI dynamic Web technology transfering database API functions. And it's introduced detailedly about the debugging progress of CGI.Lastly it's analyzed and validated about the function of the configuration software's communication module.The result shows the system reaches the anticipated request through testing the instance of the computer monitor system for liquefied natural gas load-unload station. The clients supervise conveniently the remote devices with IE and Mozilla explorer.