Method for achieving USB efficient transmission customized instruction communication

Abstract

The invention discloses a method for achieving USB efficient transmission customized instruction communication. The method comprises the steps that S1, a USB master device searches for a specific USBslave device; S2, the USB slave device is operated; S3, the USB master device acquires the USB slave device information and stores the USB slave device information; S4, the USB master device controlsa USB slave device camera to work, and meanwhile, the USB master device opens a preview data channel to transmit preview data of the USB slave device camera; and S5, the USB master device sends a customization instruction to the USB slave device, and reads data responded by the USB slave device for the instruction. According to the invention, customized instruction communication between the masterUSB device and the slave USB device is realized; the problem of instruction communication length of master and slave USB devices is solved, instruction customization is achieved, the instruction length is increased, the main control end receives communication of a single packet of 1K bytes, and instruction customization is convenient and efficient; and the instruction sent by the main control endcan be longer than 64 bytes, and the data received by the main control end at a time can be 1K, so that the communication efficiency is greatly improved, and the communication duration is saved.

Description

【Technical field】 [0001] The invention relates to the technical field of USB transmission, in particular to the technical field of high-efficiency USB transmission of custom instruction communication. 【Background technique】 [0002] The current UVC protocol of the USB interface is a common USB camera standard protocol, such as the acquisition and setting of some resolutions, white balance and other camera effect parameters. It is difficult to expand some functional interfaces other than those for some large data packets. instructions cannot be implemented and have a shorter length limit for control instructions. 【Content of invention】 [0003] The purpose of the present invention is to solve the problems in the prior art, and propose a method for implementing USB efficient transmission of custom command communication, which can realize command customization and increase the command length, and solve the problem of the command communication length of the master-slave USB de...

AI Technical Summary

Problems solved by technology

[0002] The current UVC protocol of the USB interface is a common USB camera standard protocol, such as the acquisition and setting of some resolutions, white balance and other camera effect parameters. It is difficult to expand some functional interfaces other than those for some large data packets. instructions cannot be implemented and have a shorter length limit for control instructions

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