Method for selecting application mode of universal serial bus (USB) equipment and USB equipment

Abstract

The invention discloses a method for selecting an application mode of universal serial bus (USB) equipment and the USB equipment. The method comprises the following steps of: pre-storing the configuration information of a plurality of pieces of application, and setting that the USB equipment is operated in a non-driven mode after establishing electrical connection with host equipment; carrying a list of the pre-stored application supported by the USB equipment into a user application selection instruction, and transmitting the user application selection instruction to a user by using a USB graphic user interface; receiving a returned user application selection response instruction, judging the application mode selected by the user is not a charge / power supply application mode, and setting that the USB equipment is operated in a normal operation mode; reading the configuration information corresponding to the application mode selected by the user from the configuration information of the plurality of pieces of application pre-stored by the USB equipment according to the application mode selected by the user, and transmitting the read configuration information to the host equipment by using a USB data wire interface; and configuring the USB equipment according to the received configuration information, and performing data transmission with the USB equipment by using the host equipment. By the method and the USB equipment, the structural complexity of the USB equipment can be reduced, and the convenience of application selection of the user can be improved.

Description

technical field [0001] The invention relates to a universal serial bus (USB, Universal Serial Bus) technology, in particular to a method for selecting an application mode of a USB device and the USB device. Background technique [0002] The USB interface is the most common standardized interface in the communication field. The USB device adopts the USB interface. Due to the standardization of the interface and the portability of the USB device, it can be plug-and-play with the host (HOST), so it has been widely used in various fields. . When communicating with the HOST, by inserting the USB device into the HOST, the host interacts with the USB device through the USB interface, obtains the configuration information of the USB device and performs corresponding configuration, and then the host can perform data transmission with the USB device. Generally, a USB device has a USB interface, and for a class of applications, such as data transmission, video camera, power supply / cha...

AI Technical Summary

Problems solved by technology

[0038] It can be seen from the above that the existing multi-application devices that support the USB interface have multiple functions, which means that the external interfaces of the device will increase accordingly. Each application needs to set up a corresponding interface. When there are many applications, the USB device can The number of interfaces is large, so it will inevitably increase the structural complexity of the USB device interface supporting multiple applications, and increase the cost of the USB device; at the same time, when the number of interfaces of a USB device is large, the user's operation will become complicated, that is, It is difficult to select the USB interface corresponding to the correct application. For example, for users who are not familiar with the multi-application function of USB devices, when selecting an interface to connect with external devices, it may often be difficult to find the USB interface corresponding to the application the user needs. The failure or unavailability of the interface caused by this will greatly affect the performance of the device

For example, the user needs to select the application mode of the audio transmission interface, but connect the data transmission interface to the external device, which may cause the audio application to be unavailable. Therefore, for a multi-application device, the external interface should be unified so that it It is particularly important to simplify the interface, and how to effectively make the multi-application device play its various application functions is the key to the realization of the application mode selection technology

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