The Porting and Implementation of Light-Weight TCP/IP for Embedded Web Server

The development trend of embedded technology need the web/server technology applies into embedded fields and provides a flexible remote device monitoring and management function based on Internet browser. But, due to the limitation of hardware resource and the low-efficiency of general purpose TCP/IP protocol stacks and protocol models, it is quite difficult to implement full TCP/IP protocol into embedded system when accessing to Internet. The paper analyses the Light-Weight TCP/IP and gives the detailed processing of every layer first, then designed the hardware platform with the PHILIPS LPC2200 and RTL8019AS core and the software platform with muC/OS- II, porting the LwIP based on them. A thin server is designed based on LwIP, and the state transform of client and server when they were communicating was analyzed. At last, the EWS was tested on the Production of Storage Battery Control System, the result indicated the EWS can long-distance monitor the devices real-timely and perfectly.