Message-interval-limitation-free 1553B bus communication method and 1553B bus communication system

Abstract

The invention provides a message-interval-limitation-free 1553B bus communication method and 1553B bus communication system which are applied to a communication system comprising a bus controller BC and a remote terminal RT. The method is characterized by comprising the following steps that: step 1, an RT sub-address sent to an RT by a BC is set as a cyclic buffer mode and a non-interrupt mode receiving mode, the message content of the data sent by the BC to the RT comprises a data effective mark and data effective content; step 2, the RT receives data sent by the BC in a query mode; and step3, if the data sent by the BC contains a data effective mark, the RT reads the effective content of the data. According to the method provided by the invention, the bus message interval does not needto be limited, so that the reliability of 1553B bus communication is improved, the design logic of BC software is simplified, and the performance and the communication efficiency of the software are improved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a 1553B bus communication method and system without message interval limitation. Background technique [0002] The functional applications of spacecraft are becoming more and more diverse, and the design of the corresponding spaceflight software is also becoming more and more complex. How to simplify the software design logic and improve software performance and operating efficiency has become a challenge in the current star software design. [0003] The data communication between the various modules of the spacecraft is one of the main information flows of the spacecraft in orbit. The digital tube computer is connected to each module through a serial bus, and performs data interaction with each module through data collection and instruction distribution. [0004] MIL-STD-1553B is a digital time-division serial data bus, which has the characteristics of high reliability, ...

AI Technical Summary

Problems solved by technology

Due to the differences in the performance of software and hardware among the modules, if the digital control computer star service software does not control the timing of bus messages, it is inevitable that messages will be lost due to too short message intervals

As the BC terminal, the digital control computer star service software usually designs the intervals of all adjacent messages uniformly; for messages with the same RT sub-address of the same RT device, only one message is sent in one or more cycles. These factors seriously affect the bus Efficiency of communication and performance of star software

Images