Design And Implementation Of ARM-based Network Communications Controller

Computer technology and network communication technology mature over time, modern people change the way of life and attitude, they want a progressive but a sufficient sense of security living environment, the pursuit of intelligent communication equipment is the ideal direction of the mainstream of life.I closely linked to the the S3C2440-32-bit micro-processing center, displaying a multi-function embedded network controller, the controller contains1channel Ethernet interface, USB Host Interface1channel1channel USB Device interface,1RS485expansion card, a CAN bus expansion card,3-way RS232serial port, an RS422expansion card,1-channel D/a,8channel a/D,4road PWM, a240×320TFT LCD display touch screen. This network controller is set up by the integration with Windows CE embedded software development platform.In view of this, this study focused on the following:(A) access to the Internet(B) Embedded Heterogeneous NetworksI designed a the embedded heterogeneous network Internet Off, it is to proceed from the basic theory of embedded Internet, the use of embedded operating system Windows CE. And as the theme for the RS485bus network and CAN bus network, specifically explain the gateway communication protocol, hardware architecture and software architecture. This gateway is based on a modular design as a means to a variety of heterogeneous embedded network systematic. It has a distinct advantage as follows:(A) made possible by the low-performance embedded devices connected to the Internet;(B) so that the original the multiple interconnected the embedded heterogeneous network of non-contact, can be cut, scalable, easily portable software structure.Communication network with real-time performance, depending on the circumstances of the network have different requirements. In this paper, the priority of the communication response mechanism more in line with the requirements of real-time embedded gateway. I was confirmed access gateway is fully able to meet the purpose of the first set. the simulation test proved this point.