| Embedding is to implant microprocessors inside electronic devices in purpose to make them more automatic, more intelligent. With the development of information technology and the popularity of digital products, from simple electronic devices to industrial equipments, from civilian products to military equipments, Embedded Systems have already been used in many fields such as networking, military defense, automation, wireless communication. The Embedded system topic is one of the hottest issues of 21st century for its development potential and broad prospects in applications.This paper describes an embedded wireless projector gateway that uses the AMD Geode GX533 processor and Windows CE as OS. This equipment is connected to the projector using the standard VGA interface and receives data from a wireless LAN interface. In the meantime, it can display a classic PC or notebook's desktop. This enables users to easily perform documents, applications or picture's presentation without worrying about cable's length. The presented equipment can be used as a standalone device. Beside this, it also can read various documents such as doc, PPT and BMP files. Therefore it has a broad application prospect.This paper first introduces the principle of embedded system and wireless LAN then describes the whole design of the embedded wireless gateway projector. The Windows CE operating system's structure and principles are also presented. Details are given on the system used key technologies such as screen copy, JPEG compression algorithm, Windows CE kernel customization, Web Server in Windows CE and wireless Network configuration program. Finally the testing process and test results of the entire system are presented. The system described is this paper has been realized and can be used as a reference in other embedded system developments. |
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