Abstract: During the bus test, engineers need to look through the interface control file and convert the received binary number to decimal number, which leads to long time of fault location. An ARINC429 bus data description method based on tree structure file format is proposed to solve this problem, and the interface control file decoding library is established based on XML by using this description method. The decoding library contains the transmission speed, parameter name, parameter unit and other information of ARINC429 data words, which can realize the decoding of BNR, BCD and DIS in ARINC429 specification. The decoding library is applied to the communication and navigation hardware in the loop simulation platform of a certain domestic aircraft avionics system. The results show that the simulation platform can identify and decode the data received by the acquisition board. It can separate the simulation test software from the coding library, improve the maintainability, and reduce the total amount of decoding code in the simulation test software, and it is highly mobile vegetative.

Key words: aviation bus, extensible markup language(XML), interface control document(ICD), ARINC429