Design And Implementation Of ARINC429Interface Based USB

Because of the large volume and expensiveness that the testing system of the currentavionics has,after researching the ARINC429data bus protocol and referencing the chipdesign at home and abroad in detail,this paper presents a solution based on USB buscombined large scale programming technique.The paper accomplishes communicationbetween interface and computer through USB bus,and achieves the Receiving and sending ofARINC429single and the communication between ARINC429single and USB bus interfaceusing FPGA.That makes the system design and the connection between computer and broadsimple,and achieves the portability and usability of testing system.The paper firstly introduces Research background and significance and key technologiessuch as ARINC429data bus protocol and the development procedure of USB device and soon. Secondly, shows the system’s train of thought to design as a whole. Thirdly, expounds thedesign and achievement of hardware and software in system. Software mainly contains threedepartment: interface firmware program and USB driver and the user application program；The design of the hardware circuit mainly contains USB bus interface circuit and USB-429bus interface circuit and modulation and demodulation circuit. Lastly, it tests the systemthrough handware platform builded by oneself.The broad designed in this paper has two channels to receive and send single.It suppliestwo speeds optional:100kbp and12.5kbps. The data has32bit and the time interval to senddata can be set up by oneself.By testing，the broad has stable performance and can transferdata reliably. So, it can be applied expediently in the avionics testing which bases onARINC429bus.