The Research Of A Portable Fault-shoot Instrument Of Aeronautical Electronic Devices Based On ARINC 429 BUS

This paper introduces the development of a portable style fault-shoot instrument ofaeronautical electronic devices based on ARINC429 bus which refer to the Jc Air 429Edesigned in USA.This system used two MCU's. HS-3282 which is a high-performance 429interface chip and a own-design electric voltage change circuit of 429 voltage concretessimple-configuration, high-reliability fault-shoot instrument of aeronautical electronic devices.The voltage change circuit substitutes for HS-3182 which is a special chip for the voltagechange from CMOS voltage to 429 voltage ,it simplified the design of power circuit. Thehardware of this system adopts modularized design. It consists of MCU,the receive/send partof 429 Bus data,the display part,the keyboard part and the detecting part for power etc. Thesoftware of this system consists of several sub programs which are designed according todifferent functions of the hardware modules. This device achieved receiving, sending andshowing of the message of 429 bus. It can communicate with aeronautical electronic devicesbased on 429 bus in point-to point method, quickly finds out the trouble point and locks thefaulted device through analyzing the bus data. This system is designed for Xi'an Airplane Company. We have made several experimentsin the design period .It has been proved that this device can send, receive the bus dataaccurately and reliably. This device is portable for checking on aboard, it provided a kind ofeasy and quick auxiliary method for the faulty shooting of the aeronautical electronic devicesor 429 bus. It has a sample circuit, reliable data transmission and low price, so it has widemarket prospect .