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USB data transmission method, device and USB slave device adapter

A data transmission method and a technology of a data transmission device, which are applied in the USB field, can solve problems such as not yet ready for processing, and achieve the effects of controlling overhead and simplifying the work process

Active Publication Date: 2019-05-07
BEIJING TRICOLOR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But in fact, when the USB slave device receives the transaction request, it may not be ready to process the transaction request

Method used

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  • USB data transmission method, device and USB slave device adapter
  • USB data transmission method, device and USB slave device adapter
  • USB data transmission method, device and USB slave device adapter

Examples

Experimental program
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example 1

[0096] Instance 1, such as image 3 As shown, it shows the specific process when sending an IN transaction request. This process acts on the USB data interaction system composed of the upstream end and the downstream end. The upstream end includes the USB master device and the master device adapter, and the downstream end includes the USB slave device and From the device adapter, the process includes the following steps:

[0097] Step 1, the USB host device sends the generated IN transaction request to the host device adapter; the IN transaction request carries IN Token (IN token);

[0098] Step 2, the master device adapter forwards the IN transaction request sent by the USB master device to the slave device adapter, so that the slave device adapter receives the IN transaction request;

[0099] Step 3, the slave device adapter sends the IN transaction request to the USB slave device;

[0100] Step 4, the slave device adapter saves the IN transaction request in the correspond...

example 2

[0113] Instance 2, such as Figure 4 As shown, it shows the specific process when sending the OUT transaction request, which is used for such as Figure 5 As shown in the system architecture, the system architecture includes: an upstream end, a central control end (equivalent to a downstream end) and a connector. The upstream end includes a PC end (each PC is equivalent to a USB host device), a KVM signal sending end (equivalent to a host device adapter), and the connector is a KVM signal switching matrix (equivalent to establishing a connection between a KVM signal sending end and a KVM signal receiving end. Signal switching device between signal mapping channels), the downstream end includes KVM signal receiving end (equivalent to slave device adapter), USB storage device (equivalent to USB slave device), display array and HID human-computer interaction device (such as keyboard, mouse) The process includes the following steps:

[0114] Step 1, the USB host device sends the...

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Abstract

The invention provides a working method of a USB adapter and the USB adapter, and relates to the technical field of USB. In the USB data transmission method provided by the present invention, after the slave device adapter receives the processing transaction request sent by the upstream end, while sending the processing transaction request to the USB slave device, it also saves the processing transaction request in the downstream end for pre-set Furthermore, when the slave device adapter receives the NAK response receipt generated by the USB slave device, it can initiate retransmission spontaneously, and no longer needs to be initiated by the upstream end, which simplifies the workflow and controls the upstream The overhead of data transmission between the end and the downstream end.

Description

technical field [0001] The invention relates to the technical field of USB, in particular to a working method of a USB adapter and the USB adapter. Background technique [0002] With the advancement of electronic technology, USB data transmission technology is becoming more and more mature. The two ends that implement USB data transmission technology are the upstream end and the downstream end respectively. Specifically, the upstream end is divided into a USB host device (USB-Host, such as a PC) and a host device adapter (USB Device Adapter); the downstream end is divided into USB slave device (USB-Device, such as USB storage device) and slave device adapter (USB Host Adapter). [0003] During USB data transmission, usually, the operation is first initiated by the upstream end and controlled by the USB master device. The master device adapter will first send a transaction request to the slave device adapter, and then the slave device adapter will forward the transaction req...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08G06F13/38
CPCH04L67/1095G06F13/385H04L67/60
Inventor 关文杰王志涛
Owner BEIJING TRICOLOR TECH