This paper introduces the hardware design and software algorithms for the avionics communications ARINC429 bus interface circuit.In this design,a special 429 bus interface chip HS3282 is used to achieve on receiving two-way 429 signals and sending a single-way 429 signal,and the interface can meet the requirements of data collection for the testing equipment.The 16-bit data information can be processed conveniently by using 16-bit MSP430 MCU.Finally,the interface circuit＇s reliability and practicality are verified by the method which the data is transmitted by this interface and then received itself.%本文在详细阐述了ARINC429总线传输规范的基础上,主要介绍了以MSP430为控制器的航空ARINC429总线测试接口电路的软硬件设计方案。该接口电路以MSP430为控制核心,采用专门的429总线接口芯片HS3282和HS3182,可以实现对429信号的两路接收和一路发送,满足了测试设备的数据采集要求。采用16位的MSP430系列单片机作为控制器可以方便处理16位的数据信息,满足了HS3282芯片对数据总线宽度的要求。最后为了保障系统能正常工作,设计了自发自收电路来验证该接口电路的可靠性以及实用性。
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