Design And Development Of Embedded Multi-protocol Gateway

With the development of sensors, Ethernet communications, industrial field bus, embedded systems technology, Things have been widely used in the fields of logistics, smart grid, public security, intelligent buildings, Things core idea is to put any object connected to the Internet, Which plays an important role is the gateway, Embedded multi-protocol gateway is a new product now in the electronics market,You will have different communication interfaces sensors are connected to the same gateway, distributed data transmission and control, greatly reducing design costs and enhancing the maintenance of the late.This paper describes the development process for embedded multi-protocol gateway system, Including Hardware circuit design and software development.The STM32F407 that is high-performance 32-bit ARM processor is used on system, Porting and optimization LWip, freeMODbus, CANfestival that are lightweight communication protocols, run on A high speed ARM processors, to designs Embedded multi-protocol gateway. First of all, No case of application layer protocols, The main means of communication is to achieve a two-way transparent transmission mode, such as, Ethernet and CAN interface conversion, Ethernet and RS485/232 interfaces conversion, RS485/232 and CAN interface conversion. You can set the data length, transmission rate of CAN, RS485, RS232 communication interface.Then, if you are using an application layer protocol, the main means of communication are MODbus TCP and MODbus protocol conversion, MODbus TCP and CANopen protocol conversion, which are both One-way half-duplex transmission. Multi-protocol cross half-duplex communication, task switching, buffer messaging, Information blocking and errors, other issues. Giving my own ideas of programming designing.Finally, Through the experiment, to verify the performance of the whole system, to analyze the results,It shows the results of the project design and development and summarizes the development process problems. Practice has proved that the embedded multi-protocol gateway designed in this paper can be substantially complete communication interface transparent transmission, protocol conversion and other design tasks.