Multi-channel software-hardware paralleled serial communication processing method

Abstract

The invention relates to a multi-channel software-hardware coordinated calling method for the purpose of narrowing the gap between the increasing number of sophisticated spacecrafts for controlling computer serial communication and limited software-hardware resources of embedded systems. The method comprises following steps of reusing hardware multichannel series channels; sending, caching and reusing, receiving cache independence, setting channel numbers via software to achieve channel switch, and setting send data lengths of corresponding channels and receive data lengths; reusing receive interruption and overtime interrupt of serial ports, adopting to same receive interruption and overtime interrupt by multiple channels of series ports and occupying external interrupt resources of the same CPU; and carrying out software-hardware parallel work in order to achieve serial communication of multiple channels. The serial communication of multiple channels is finished by main processes of software tasks, interruption processes of software and hardware processing. The multi-channel software-hardware paralleled serial communication processing method helps to achieve multi-channel software-hardware paralleled serial communication in order to save computer hardware resources, and reduce CPU time occupied by multi-channel serial communication and is applied for controlling a computer of a certain type.

Description

technical field [0001] The invention relates to the serial port communication technology of a spacecraft control computer, in particular to a multi-channel software and hardware parallel serial port communication method. Background technique [0002] With the increasing complexity of tasks in the aerospace field, more and more stand-alone aircraft with different purposes are equipped on spacecraft. The control computer and many stand-alone machines establish a complex control system through data interaction. The most common way is serial communication. [0003] In the general control computer serial port communication design, the control computer acts as the master node. After starting a certain channel communication, it enters an empty loop and waits. After receiving all the data, it switches to the next channel. When there are many channels and many bytes to send and receive, on the one hand, the limited hardware resources of the embedded system of the control computer ...

AI Technical Summary

Problems solved by technology

When there are many channels and many bytes to send and receive, on the one hand, the limited hardware resources of the embedded system of the control computer cannot meet the requirements of multiple independent serial ports, independent receiving and sending buffers; on the other hand, the communication mechanism of the query waiting mode is more wasteful The CPU processing time cannot meet the needs of complex control system processing cycle time resources

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