Key test instruction system and method based on serial port redundancy strategy

Abstract

The invention provides a key test instruction system and method based on a serial port redundancy strategy. The system comprises a serial interface sender and a serial interface receiver, wherein the serial interface sender comprises a data output module, a data receiving module and a data frame format judgment module; and the serial interface receiver comprises a data receiving module, a data frame format judgment module, an instruction validity judgment module and a data output module. According to the key test instruction system and method provided by the invention, when two nodes performs key test instruction interaction through serial interfaces in an interference condition, the reliability of data communication of the nodes can still be ensured in the case of bidirectional invalidity of a single path of serial ports or unidirectional invalidity of double paths of serial ports, and key test instruction transmission anomaly and other problems in the case of strong magnetic interference is avoided, thereby ensuring the continuity, reliability and security of system operation, and laying a foundation for the normal continuous operation and timely and reliable accomplishment of various functions of the system.

Description

technical field [0001] The invention relates to the fields of aerospace, reliability and serial interface message processing, in particular to a key test command transmission method based on a serial port redundancy strategy. Background technique [0002] Due to its high transmission rate, high reliability, mature technology, and easy expansion, the serial interface has been widely used in the interconnection of electrical equipment in aerospace systems. The serial interface generally adopts a point-to-point connection mode. Compared with the bus interface, the physical layer, link layer and protocol layer are all simplified, which improves the ease of use and reduces the cost of use. The operating entity of the serial interface generally includes a transmitter and a receiver. The transmitter receives the protocol layer data, and after adding the transmission protocol through the link layer, it sends it to the receiver physical layer through the physical layer, and then pars...

AI Technical Summary

Problems solved by technology

Commonly used serial ports have added reliability measures in the transmission cable and protocol layer to improve the reliability of data transmission, but in the interference environment, the above measures are still not enough to ensure the high reliability of serial interface communication. To address the problem of reduced reliability of the line interface, a key test command transmission system and method based on the serial port redundancy strategy is proposed

[0003] From the literature, there are no examples of high-reliability processing of key test instructions transmitted through the serial interface at home and abroad. Therefore, a high-reliability transmission method of key test instructions based on the serial port redundancy strategy is proposed.

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