Design of High Reliability Serial Communication Interface Based on RS422
In recent years,with the rapid development of domestic aircraft,serial communication is the most commonly used data transmission mode in airborne equipment,and plays an indispensable role in the development of aviation computer technology.Among them,RS422 serial communication is widely used in aircraft manufacturing with the advantages of full duplex,fast speed and low cost.However,with the increasing requirements of airborne equipment for data transmission,the traditional RS422 bus uses a single redundancy transceiver interface for data exchange between source and destination,which is difficult to ensure the reliability of data transmission and receiv-ing.In addition,with the rapid development of aviation technology,airborne equipment is faced with more and more complex cross-linking systems and more and more data.When communication faults occur,it is often faced with problems such as fault clutter and difficulty in locating faults.Therefore,the traditional single-redundancy ser-ial interface is difficult to ensure the reliability of equipment communication.To solve the above problems,this pa-per proposes a high-reliability serial communication interface,which can significantly improve the reliability and maintainability of the product in normal operation.
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