本文首先針對傳統以太網難以勝任控制中硬實時要求的問題，提出一些確保以太網在
工業控制中實時性的措施。然后描述了基于以太網的嵌入式控制器設計的整體方案，并以ATMEL 公司的AT91M40800 芯片為核心，設計開發了嵌入式網關的硬件平臺，該平臺帶有2M Flash, 2M SRAM 以及10M 以太網接口。最后，對系統驅動程序的設計和Web 服務器的實現進行了詳細的介紹。
關鍵詞：M40800，網關，Web 服務器
Abstrsct：With the development of Embedded System and Internettechnologies, the research on connecting Embedded System with Internethas become a popular issue in recent years. As traditional Ethernet is not suitable for hard real-time controlsystems, in this thesis, several technologies are provided to make the Ethernet real-time. The whole design of an embedded gatway is proposed, and based on AT91M40800 of ATMEL Core, a hardware platform of embedded controller based on Ethernet is developed, which has 2M Flash, 2M SRAM and l0M Ethernet interface. Then the paper designed programs including system driver and Web server realisation,which was particular introduced.
Key word: M40800,gatway ,Web server