The Study Of Embedded Internet Technique Based On MCU

With the arrival of Post-PC era, the embedded system is applied more extensively day by day. And with the appliance of the Internet growing in popularity, it becomes a hot issue in the IT world how to add the Internet to embedded system to help people control and monitor remote embedded devices conveniently.Embedded Internet technology is the product of embedded system and the Internet technology. It aims at resolving the connection between the Internet and embedded devices. If embedded devices and the Internet were connected, information could be sent to anywhere of the world immediately and conveniently.This paper introduces the embedded Internet technology based on low-end MCU. Firstly, the basic knowledge of embedded Internet is introduced. And then the embedded TCP/IP stack is expanded, which is simplified from standard TCP/IP in accordance with the characteristics of embedded devices. The embedded TCP/IP stack described in the paper is suitable for 8-bit MCU. The stack includes IP, TCP, ICMP and ARP.The embedded Web server is discussed on the basis of embedded TCP/IP stack. The implementation techniques of an embedded Web server are introduced in detail. The hardware of the embedded Web server is based on C8051F020 MCU and Ethernet controller CP2200. The configuration of the hardware and the driver for CP2200 are also explained in detail.The system functions as a node with independent IP address in the Internet. And any network devices or PCs in the Internet running a Web browser can access the Web pages stored in the system. Meanwhile, The information can be exchanged between the Web server and the remote device through the control button on the Web page.