针对飞行器在发射前需要对传感器进行模拟单元测试来验证各功能的正常工作,设计了一种以FPGA为控制核心,HDLC通信协议与UART通信协议相结合的数据链路通信模块,模块包含2路基于HDLC通信协议的同步RS-422通信接口、2路基于UART通信协议的数据通信接口以及2路无源指令接口。实验结果表明,各通信接口功能均可以实现数字量数据的精准传输。

In view of the fact that the sensor needs to be simulated and tested before the launch of the aircraft to verify the normal operation of each function,a data link message reading module is designed,which takes FPGA as the control core and combines HDLC message reading protocol.It includes two synchronous RS-422 communication interfaces based on HDLC communication protocol,two data communication interfaces based on UART communication protocol and two passive command interfaces.The experiment results show that the functions of each communication interface can realize the accurate transmission of digital data.