Command Return Jig for Onboard Microcomputer Mode Switching
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Solution Overview
Problem
Conventional methods require a large-scale and expensive external apparatus to set onboard information equipment in a specific operation mode for debugging, and it is difficult to confirm if the equipment is in the correct mode before shipment.
Innovation Solution
A debug system using a command return jig connected via a communication interface to easily switch the microcomputer to an operation environment it does not normally use, allowing mode changes with a simple structure and enabling confirmation of the mode setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a large-scale expensive external apparatus (PC) is connected to set the microcomputer in a specific operation mode, then the operation mode can be switched, but the device complexity and cost increase
Solution Approach 1:
The patent extracts the essential function of mode switching from the complex PC system and implements it through a dedicated command return jig that loops back the check mode command within the microcomputer system itself, eliminating the need for expensive external apparatus
Solution Approach 2:
The microcomputer is designed to autonomously generate and return the check mode command through the communication interface unit when specific conditions are met (such as detecting a predetermined pattern on the communication line), enabling self-service mode switching without external intervention
2Adaptability or versatility
If a large-scale expensive external apparatus (PC) is used for debugging, then commands can be input to switch operation modes, but the cost and device complexity increase
Solution Approach 1:
The patent extracts the essential debugging function of inputting mode-switching commands from the complex PC system and implements it through a simple command return jig that loops back the check mode command within the microcomputer system itself
Solution Approach 2:
The command return jig creates a simplified copy of the PC's command input function by automatically returning the check mode command that the microcomputer itself generates, providing equivalent debugging capability with minimal hardware
3Reliability
If conventional methods are used, then the microcomputer can be set in check mode, but it is difficult to confirm externally whether the equipment is in the correct mode
Solution Approach 1:
The patent implements feedback by having the microcomputer automatically return the check mode command through the communication interface unit when in check mode, creating an observable signal that confirms the mode setting without requiring additional detection equipment
Solution Approach 2:
The microcomputer performs self-confirmation by generating and returning the check mode command autonomously when specific conditions are met, allowing the system itself to verify its own state without external detection apparatus
Data Source
AI summary
A debug system includes equipment to be debugged (onboard information equipment 10) which is controlled by a microcomputer 11; and a command return jig 20 which is connected to the equipment to be debugged via a communication interface unit 12, receives a specific command generated and output by the microcomputer 11 via the communication interface unit, and outputs the specific command by return to the equipment to be debugged, wherein the equipment to be debugged switches, when receiving the specific command from the command return jig, the microcomputer to set it in an operation environment the microcomputer does not use normally.