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Method, device and usb system for judging usb device connection

A device connection and equipment technology, applied in the direction of instruments, electrical digital data processing, etc., can solve problems such as disconnection and misjudgment

Active Publication Date: 2020-05-19
ACTIONS ZHUHAI TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in fact, the judgment is made by using the single-ended signal amplitude received by the master device, and the problem of disconnection misjudgment often occurs

Method used

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  • Method, device and usb system for judging usb device connection
  • Method, device and usb system for judging usb device connection
  • Method, device and usb system for judging usb device connection

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Embodiment Construction

[0030] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0031] For example, see figure 1 It is a schematic diagram of a possible implementation environment of the embodiment of the present invention. like figure 1 As shown, in this implementation environment, it may include: a USB host device 110 , a USB slave device 120 , and a cable (cable) 130 for connecting the USB host device 110 and the USB slave device 120 . Wherein, the pins of the interface between the USB host device 110 and the USB slave device 120 include: VBUS (USB voltage, 5V), DP (D+) (differential signal positive pole), GND (ground wire), and so on.

[0032] figure 2 It is a flowchart of a method for judging the connection of a USB device accordi...

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Abstract

The invention discloses a method and a device for judging USB equipment connection and a USB system. The method comprises the steps that under a single-ended signal transmission mode, a single-ended signal amplitude difference between USB master equipment and USB slave equipment is calculated; and in the process of judging whether the USB slave equipment is disconnected, the single-ended signal amplitude difference is utilized to eliminate a judgment error, and therefore the purpose of avoiding disconnection misjudgment is achieved.

Description

technical field [0001] The present invention relates to the field of communication equipment, in particular to a method, device and USB system for judging the connection of USB equipment. Background technique [0002] USB is the abbreviation of Universal Serial Bus (Universal Serial Bus). The USB interface of the USB host device and the USB slave device can be connected through a cable. For example, the mobile phone can be powered by the USB bus, and the USB interface of the mobile phone can be connected to the USB interface of the computer through a cable. The computer is the USB master device, and the mobile phone is the USB slave device. [0003] According to the specifications of USB2.0 and USB3.0, the controller of the high-speed serial USB master device will judge whether the USB slave device is disconnected according to the single-ended signal amplitude received by the master device. However, in practice, the judgment is made by using the amplitude of the single-end...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/40
Inventor 余静
Owner ACTIONS ZHUHAI TECH CO
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