Serial port time sharing multiplexing method and system

Abstract

The embodiment of the invention discloses a serial port time sharing multiplexing method and a system and relates to the field of communication. According to the serial port time sharing multiplexing method and the system, a console stops to access the serial port when an application program accesses the serial port through leading out a prohibitive interface, an enabling interface and providing a set of second serial driver in an embedded operating system; when the application program stops to access the serial port, the console recovers to access the serial port, so that the console and the application program can multiplex the serial port in a time-sharing manner, and the communication conflicts are avoided. The method of the embodiment comprises the following steps: the prohibitive interface and the enabling interface are led out by the first serial driver; when the application program requires to access the serial port, the console is informed to suspend to access the serial port by the second serial driver through the prohibitive interface; the application program accesses the serial port through the second serial driver; when the application program is not required to access the serial port, the application program stops to access the serial port, the console is informed to recover to access the serial port by the second serial driver through the enabling interface.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for time-division multiplexing of serial ports. Background technique [0002] The serial port has the advantages of simplicity and ease of use, for example: the serial port does not require additional operations such as wiring and setting IP, making it a common resource in embedded systems. [0003] Generally, after the embedded system is started, the serial port will be occupied, and the serial port will be used as the console. The console will capture and echo the data received from the serial port, and at the same time output the system’s print information to the serial port; when the console is running in the foreground, it will parse the data it receives from the serial port as a command. In an embedded system with only one serial port, if the application program wants to communicate with other devices outside the embedded system through the serial port without...

AI Technical Summary

Problems solved by technology

[0004] The inventor found that the prior art has at least the following problems: when there is only one serial port in the embedded system, communication conflicts will occur when the application program in the system communicates with other devices outside the system through the serial port

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