Method for implementing multi-function by single-terminal serial port

A multi-function, serial port technology, used in instruments, electrical digital data processing, etc., to avoid physical interference and simple design

Inactive Publication Date: 2009-07-01
SHANGHAI SIMCOM LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the prior art has not yet realized the design of multi-func

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  • Method for implementing multi-function by single-terminal serial port
  • Method for implementing multi-function by single-terminal serial port
  • Method for implementing multi-function by single-terminal serial port

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[0016] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

[0017] The present invention provides the realization of the combination scheme of software design and hardware design, such as figure 1 As shown, the whole design is divided into three parts: PDA (personal digital assistant) terminal software design (the terminal device adopts PDA in this embodiment), PC terminal software design and hardware circuit. The specific flow of the method for realizing multi-function multiplexing of this single-ended serial port is as follows: figure 2 Shown:

[0018] Step 101, on the PDA side, the system establishes several logical channels, and each channel corresponds to a virtual port on the PC side. From the perspective of developers and users, each pair of channels and virtual ports is a pair of serial ports (this serial port is a virtual serial port ...

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Abstract

A method of realizing multifunctional multiplexing on a single-end serial port comprises the following steps: constructing a plurality of logic channels corresponding to the virtual end of a personal computer end on a terminal device end and constructing the interlayer of a universal asynchronous receiver and transmitter on the device end, transmitting data of all virtual interfaces on the same physical serial port for assembling data packs with marks to differentiate the data of different virtual serial ports when in communication, constructing the interlayer of the universal asynchronous receiver and transmitter of the personal computer end for encapsulating or decoding the data packs from all logical channels, and conducting the data transmission on each virtual port, and realizing the exclusive access of components in the serial port connection mode of system physical one-end-to-many end dependent on a route chip. The method realizes the multifunctional multiplexing on a single end physical serial port channel. A software frame is designed simply, and the physical serial port of a PDA is prevented from simultaneously connecting with a serial port on a PC and other serial ports to generate physical interferences on a hardware circuit.

Description

technical field [0001] The invention relates to a method for realizing multi-function multiplexing of a single-end serial port, and the method includes the design of hardware and software. Background technique [0002] In the development process of many products, there is a problem of insufficient serial port "resources". For example, only one physical serial port is designed to connect with the outside in the design, but at the same time, the system may have multiple applications or multiple external devices that need to be connected. However, in the prior art, there is no design for realizing multi-functional multiplexing on a single-ended physical serial port channel. Contents of the invention [0003] The object of the present invention is to provide a method for realizing multi-function multiplexing of a single-port serial port, which realizes the communication of multiple applications (or multiple devices) on the single-port serial port. [0004] The purpose of the ...

Claims

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Application Information

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IPC IPC(8): G06F13/42
Inventor 辛健
Owner SHANGHAI SIMCOM LTD
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