Research And Implementation Of Network Interface In Embedded Systems

In recent years, all sorts of embedded systems are widely used in the areas of communication, aviation, mechanical, consumption and other fields. With the rapid development of network technology, embedded systems require interfaces to connect them through Internet, so the network interface is becoming a necessary module of the modern embedded systems. The network interface in embedded system means extending related network technologies, including streamlined hardware, firmware, and application software to an embedded system directly, so that it has directly connecting capabilities with Internet/Intranet.As an embedded system must be designed efficiently, it is a very promising field to not only design single or mass network interface(s) in limited hardware and software resources, but also achieve with smallest size, real-time, low in power consumption and porting abilities. Moreover, several issues still exist unsolved in the realization of embedded network interface modules currently, such as power supply difficulties, module switching difficulties, compatibility between phone-calling and internet, and poor network service quality, etc.This paper does researches based on several related project developments, compares the factors of GPRS (General Packet Radio Service), CDMA (Code-Division Multiple Access) 1X and embedded Ethernet with actual requirements, and a detailed study of solutions under Linux is given. Specifically including: GPRS dial-up interface based on the MC35I module and CDMA1X dial-up interface based on the Q2358C module; Ethernet interface based on the PCMCIA/CF standards. On this basis, it analyses theoretical and practical problems and makes an optimization to the traditional designs. Several comprehensive solutions are made, which could be applied to a variety of embedded systems that have network interface requirements.