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Method and apparatus for expanding multiple serial ports of terminal

A terminal expansion and multi-serial port technology, applied in the field of serial port expansion, can solve the problems of high cost, technology dispersion and development difficulty, and achieve the effects of low cost, strong stability and low failure probability

Active Publication Date: 2008-11-12
SHENZHEN HONGDIAN TECH CORP
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Problems solved by technology

[0007] In order to solve the technical problems of high implementation cost, technology dispersion and development difficulty in the existing technology, the present invention proposes a method and device for terminal expansion of multiple serial ports, which only rely on simple, low-cost discrete linear drive devices to achieve , easy to deploy quickly and in large quantities, and the technology is more stable

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  • Method and apparatus for expanding multiple serial ports of terminal
  • Method and apparatus for expanding multiple serial ports of terminal
  • Method and apparatus for expanding multiple serial ports of terminal

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] see figure 1 , figure 2 , the technical solution adopted by the present invention to solve the technical problems of high implementation cost, technology dispersion and development difficulty in the prior art is to provide a method for terminal expansion of multiple serial ports, which is characterized in that it includes the following steps:

[0028] (101) define the GPIO resources of the CPU to control the enabling end of the drive device;

[0029] (102) The serial port channel of the CPU itself is connected to the I / O port of the drive device;

[0030] (103) Connecting the isolated input and output of the driving device to the physical level conversion chip;

[0031] (104) Configure the GPIO bit to select the CPU serial port to be connected to the destination port.

[0032] According to a preferred embodiment of the present invention, the...

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Abstract

The invention relates to a digital circuit technology by utilizing gorge transmission, in particular to a method and a device for gorge expansion. The invention discloses a method for expanding a plurality of gorges by a terminal and includes the following steps: (101) defining the GPIO resource of a CPU to control the enabled end of a drive device; (102) connecting the self-owned gorge channel of the CPU to the I / O port of the drive device; (103) connecting to physical PWL switch chip by the input and output of the drive device after being isolated; (104) arranging a GPIO bit to gate the CPU gorges to a target port. The invention discloses a device for expanding a plurality of gorges by the terminal and includes the CPU, and in particular a plurality of expanding gorges bidirectionally connected with the CPU. The invention has the beneficial effects that the method and the device that realize the expansion of a plurality of gorges by the terminal based on the hardware have higher stability and smaller probability of fault; besides, even a fault occurs in one circuit, the other circuits can still work normally, thus having more stability.

Description

【Technical field】 [0001] The invention relates to a digital circuit technology utilizing serial port transmission, in particular to a serial port expansion method and device. 【Background technique】 [0002] Most of the existing serial port expansion devices and methods are implemented on the system processor to expand multiple serial port interfaces through the bus, such as using Philips or EXAR serial port expansion chips. The prior art serial port server equipment also has expansion through USB interface or Ethernet interface, first expand multiple USB interfaces and Ethernet interfaces through USB HUB or Switch, and then convert to serial port through bridge chip. Another method is to use programmable logic devices such as CPLD to realize. [0003] For example, the application number is 200710175545.6, and the Chinese invention patent titled serial port multiplexing method and device proposes a serial port multiplexing method and device, which realizes communication with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/40
Inventor 冯波
Owner SHENZHEN HONGDIAN TECH CORP
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