USB Device Mode Switching for Driver Installation
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Solution Overview
Problem
USB devices, especially WiFi-enabled Ufi data card products, face issues where they are switched to a compound device multi-port mode after driver installation, leading to functional issues when disconnected and reconnected to different PCs without proper reset, affecting user experience.
Innovation Solution
An active USB device and method that allows switching from a compound device multi-port mode to a single compact disc mode upon disconnection, and vice versa, using a USB protocol stack reset function to manage mode changes without user intervention, ensuring seamless driver installation across different host devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the USB device is switched to compound device multi-port mode after driver installation, then the device can perform various user functions, but the device cannot be re-installed on another PC without manual reset
Solution Approach 1:
The USB device automatically detects whether it is connected to a host that has the driver installed and self-adjusts its operating mode accordingly. When connected to a host without the driver, the device automatically switches to single compact disc mode to enable driver installation, eliminating the need for manual user intervention or reset operations.
Solution Approach 2:
The USB device dynamically switches between two operating modes (single compact disc mode and compound device multi-port mode) based on the detected host environment. This dynamic adaptation allows the device to optimize its functionality for each specific usage scenario, ensuring both driver installability and operational capability as needed.
2Adaptability or versatility
If the USB device performs whole board reset to switch modes, then the device can switch from multi-port mode to single compact disc mode, but the startup time increases
Solution Approach 1:
Instead of performing a whole board reset, the invention segments the reset operation to only the USB protocol stack level. This selective reset approach maintains the benefits of mode switching while significantly reducing the time required, as only the necessary USB components are reset rather than the entire device system.
3Stability of the object's composition
If the USB device remains in multi-port mode after disconnection, then the device maintains operational state, but driver installation fails on new PC
Solution Approach 1:
The USB device implements a feedback mechanism that continuously monitors the host connection status and driver installation state. Based on this feedback, the device automatically adjusts its operating mode to ensure compatibility with the current host environment, thereby maintaining both state stability and installation compatibility.
Data Source
AI summary
An active USB device and a method for switching an operating mode thereof are provided. In the method, a USB devices is connected to a first host device, and the USB device is in a compound device multi-port mode; the USB device is disconnected from the first host device and the USB devices keeps in the On state; upon detection disconnection of the USB device to the first host device, the USB device switches from the compound device multi-port mode to the single compact disc mode. According to the method for switching the operating mode of the USB device in the disclosure, the USB device can install driver without distinction and completely in various complicated application environments, thereby increasing user experience.