本文首先針對傳統(tǒng)以太網(wǎng)難以勝任控制中硬實(shí)時(shí)要求的問題，提出一些確保以太網(wǎng)在
工業(yè)控制中實(shí)時(shí)性的措施。然后描述了基于以太網(wǎng)的嵌入式控制器設(shè)計(jì)的整體方案，并以ATMEL 公司的AT91M40800 芯片為核心，設(shè)計(jì)開發(fā)了嵌入式網(wǎng)關(guān)的硬件平臺，該平臺帶有2M Flash, 2M SRAM 以及10M 以太網(wǎng)接口。最后，對系統(tǒng)驅(qū)動(dòng)程序的設(shè)計(jì)和Web 服務(wù)器的實(shí)現(xiàn)進(jìn)行了詳細(xì)的介紹。
關(guān)鍵詞：M40800，網(wǎng)關(guān)，Web 服務(wù)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