Interface Circuit Switching USB Host, Slave, and HDMI Modes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Automobile diagnostic devices face a shortage of docking interfaces due to the reduced number of output interfaces in micro-control units, limiting their diagnostic capabilities.
Innovation Solution
An interface circuit with a USB HOST interface, a USB SLAVE interface, an HDMI interface, a first conversion unit, and a micro-control unit, where the micro-control unit controls the conversion units to switch between modes to establish communication with multiple docking interfaces, effectively increasing the number of available interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the micro-control unit uses fewer output interfaces to improve integration, then the integration level is improved, but the number of docking interfaces available for automobile diagnosis decreases
Solution Approach 1:
The patent applies multi-functionality by enabling a single output interface of the micro-control unit to serve multiple docking interfaces through the first conversion unit. The conversion unit allows the micro-control unit to communicate with different types of external devices (USB HOST, USB SLAVE, HDMI) through one physical interface, making the limited output interface universal and adaptable to multiple connection scenarios, thereby resolving the contradiction between integration and the number of available docking interfaces
2Device complexity
If the micro-control unit has fewer output interfaces, then the device complexity is reduced, but the diagnostic capability is limited
Solution Approach 1:
The patent introduces the first conversion unit as an intermediary between the micro-control unit and multiple docking interfaces. This conversion unit acts as a mediator that translates and manages communication between the single output interface and multiple external devices, enabling comprehensive diagnostic capabilities without requiring the micro-control unit to have multiple physical output interfaces, thus maintaining low device complexity while preserving diagnostic versatility
Data Source
AI summary
This disclosure relates to the technical field of automobiles and software and discloses an interface circuit and a method and apparatus for interface communication thereof. In the interface circuit, a micro-control unit has an output interface connected to a first conversion unit connected to a USB HOST interface and a USB SLAVE interface and a second conversion unit connected to an HDMI interface, and is configured to control the first conversion unit to be set in a HOST mode to communicate with the USB HOST interface when receiving a trigger signal from the USB HOST interface, the first conversion unit to be set in an SLAVE mode to communicate with the USB SLAVE interface when receiving a trigger signal from the USB SLAVE interface, and the second conversion unit to output the TMDS signal to communicate with the HDMI interface when receiving a trigger signal from the HDMI interface.