Embedded system serial reliable communicating control method

Abstract

The present invention relates to serial port communication field, in particular an embedded system serial credible communication control method. The technical styles include: setting a receiving buffer region FIFO in the embedded system memory continuation address, adopting serial port break working mode, divided into the foreground and the background, the background completing the serial port receiving function; the foreground analyzing the receiving buffer region after completing the serial port task. One bit physical address pair receiving task timer, if in communication, the timer is assigned with one nonzero value, once being zero, the receiving task is completed. The invention only needs less resource, effectively resolves the problem of task overtime caused by potential unfiniteness, uncontinuity and discontinuity in the serial port communication task, improves anti-interference, fault-tolerance and error correcting capability of serial port.

Description

technical field [0001] The invention relates to the field of serial port communication, in particular to a method for controlling reliable serial port communication of an embedded system. Background technique [0002] Serial communication is widely used in various devices such as modems, monitoring modules, PLCs, camera pan-tilts and related smart devices because of its simple and mature technology, reliable performance, and low requirements for software and hardware environments. The device uses the serial port as the basic interface for user development and use. When developing serial communication, whether it is half-duplex or full-duplex, there are usually two methods: query waiting mode and interrupt acceptance mode. Generally speaking, the interrupt method is more popular because of its high operating efficiency and timely processing. During the development process, an independent, circular FIFO buffer area will be defined for serial port acceptance to store the rece...

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Problems solved by technology

[0003] However, when the hardware communication is normal, there will still be some abnormal situations such as the disconnection of the serial port connection line, or when the length is wrong, which will bring difficulties to data processing and even affect the smooth completion of the subsequent work of the serial port.

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