The Logic Design Of FC Node Card That Supports For Multi-service Access And Redundant Function

With the continuous development of avionics systems,FC–AE,because of its advantages of high transmission rate,low latency,low bit error rate,and strong antijamming capability,has been widely used in various of real-time and high reliability requirements of the environment.In the practical application of FC-AE,FC-AE-ASM and FC-AE-1553 are the most widely used.At the same time,in various civil or military equipment,MIL-STD-1553 B,Ethernet,CAN and other network protocols also develop rapidly and are certain irreplaceability.With the complexity of modern equipment,the frequency of application scenarios of multi-protocol business cooperation is increasing,and a kind of FC node card designed in this paper is based on such requirements.The FC nodes card designed in this paper,as a node card in addition to supporting the FC-AEASM protocol and FC-AE-1553 protocol,also has the the function of making standard Ethernet protocol frame and standard CAN protocol frame encapsulate into FC-AE-ASM frame.In addition,when the FC-AE-1553 NC node in FC network needs to communicate with the RT node of the MIL-STD-1553 B bus,the FC node card can also be used as a protocol bridge to complete the agreement mapping between the two.In addition,the FC node card also has the performance characteristics of the thermal redundant channel to improve the reliability of the equipment.This paper starts with the research background,analyzes the research status and requirements.Then this paper also introduces the related protocols and knowledge points mentioned in the design,provides the theoretical foundation and the realization basis for the design and describes the overall framework and function of the design in detail.In this design,it is divided into two major parts,one is a multi-service access part,and the other part is the protocol bridge of FC-AE-1553 and MIL-STD-1553 B.In the multiservice access part,this article mainly introduces the related design of service access and redundant channel functions.In the protocol bridge part,this paper mainly introduces the rules and implementation process of protocol mapping.FPGA is a flexible and reliable verification platform.The main design and implementation of this paper rely on FPGA.This article carrys out the functional simulation of code through the Modelsim platform,and then makes the board test through the way of hardware and software joint debugging.Finally,this article verified the design and got the result.