The AFDX Communication Protocol Simulator Design Based On ARM

With the development and needs of the flight, the needs of people increasing,avionics systems become more complex than ever before, the traditional system withthe development of the times has been unable to meet the application now, to meet thelarge amounts of data exchange by, the development of a better data transfer bus-AFDX flights bus. The current status of the bus supporting test environment andequipment is not perfect, to provide an analog AFDX end system based on Linuximproved Ethernet made hardware to support real device emulation.The subject from at home and abroad on the study of full-duplex switched Ethernet,given their application in the ported Linux platform above, in-depth description of theworking principle of existing full-duplex switched Ethernet, as well as full theadvantages of duplex switched Ethernet, analog terminal equipment in the network, thecurrent practical application of the device developed a hardware emulation devicesimulator, the performance of the device simulator, real-time performance, meet mostof the avionics communication system, user program interface for the application.Has been carrying out the following work: First analysis of the current demand forair bus; AFDX end system system structures and the overall design of AFDX endsystem key and software architecture design; On this basis, focusing on the AFDX endof the core of the system implementation, and gives the AFDX end system softwaredesign structure.In this paper, the design of the AFDX network-based device simulator, accordingto the data of the data issued by the real device to receive and send, and parse the data.Since the data transmission is unidirectional, when large amount of data transmitteddoes not occur clogging, so data is not lost in the avionics system, which is a very important performance indicators.Based on of AFDX the exchange network design, analysis and testing, proved tomeet the real device testing, has certain positive significance of our aviation systemupgrades and maintenance, our nation’s aviation aircraft communication design certainreference significance.