Design And Implementation Of Embedded Web Server Supporting Heterogeneous Buses

Embedded system is one of worldwide issues in the field of computer science, and the applications of embedded system have applied in all aspects of people's daily life. The well developed Internet makes people's life more convenient. At this background, the embedded web server (EWS), which integrates embedded devices to the Internet, has become more and more essential. In order to keep the system's expansibility and network's convenience, An EWS supporting heterogeneous buses is designed. This EWS provides various bus interfaces for bottom terminals and provides B/S mode web service for remote users, and realizes remote monitor control by Internet.The total solution of EWS is made both on hardware and software. The system's function is realized in detail. In hardware, MPU base on ARM (Advanced RISC Machine) is used as main controller, Flash memory is used as main storage, various bottom terminal bus interfaces are supported, and a network chip is equipped; In software, linux2.4 is ported as the OS (Operate System), and device driver program is developed, Boa is used as web server program and SQLite is used as embedded database. In order to support heterogeneous buses, a concept of middle level driver is proposed, and its contribution to the embedded syetem development is analysed.As an example of the EWS, a remote meter monitor control system is designed. For application uses, the CGI (Common Gateway Interface) program, database and communication protocol are developed. The EWS's performance is tested, and the result reaches the expected target. This EWS has very potential in the field of monitor control system through Internet.