Design and Realization of Multi-Functional Gateway Based on SingleChip

Aiming at the mixed use of fieldbus in industry automatic controlling system, the paper proposes a method of multi-functional gateway based on singlechip in order to reach an inter-coordination and compatibility among different protocol standards of fieldbus. Using singlechip as the core of the system ,a proposal of inter-communication among the standard bus interfaces of CAN(Controller Area Network), Profibus(Process Fieldbus), Modbus, Serial and Bluetooth is provided. The method to resolve the incompatibility between heterogeneous fieldbus is discussed, and an integrated approach based on gateway for the interoperation between CAN and Profibus is proposed. The interface between intelligent communication chip SPC3 and singlechip is described in detail. The method can realize a unified multi-node measuring and controlling network among different fieldbus, featuring as high speed of communication, good transmission efficiency, fine working stability and low cost, which can be applied to industry controlling system of one station controlling multi-level and multi-station servomechanism.