UEFI GPIO Configuration via Command-Line Interface
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Solution Overview
Problem
Conventional methods for configuring and managing general-purpose input/output (GPIO) ports in computer systems require complex calculations and modifications to the operating system or BIOS, and settings are lost upon reboot, making them inefficient and user-unfriendly.
Innovation Solution
A software program meeting UEFI specifications that operates in command-line mode, allowing users to easily read and write GPIO register values without calculating addresses, and provides options to preserve settings across reboots by using command-line arguments to display and set default values and states of GPIO pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional methods are used to configure GPIO ports by modifying OS or BIOS, then GPIO configuration can be achieved, but the operation complexity increases and settings are lost after reboot
Solution Approach 1:
The patent introduces a UEFI shell application as an intermediary between the user and the GPIO configuration system. This application provides a user-friendly interface that abstracts the complex register address calculations and configuration procedures, allowing users to configure GPIO ports through simple commands while the UEFI firmware persists the settings across reboots
Solution Approach 2:
The patent implements preliminary action by pre-calculating and storing register addresses and configuration parameters in the UEFI firmware before the operating system loads. The UEFI shell application accesses these pre-prepared configuration data structures, eliminating the need for users to perform complex calculations during runtime and ensuring settings are established before OS initialization
2Measurement precision
If register addresses are calculated according to microcontroller specifications, then precise GPIO control is achieved, but the operation complexity and time consumption increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating all register addresses and configuration parameters during UEFI firmware initialization and storing them in data structures accessible by the shell application. This eliminates the need for runtime address calculations, providing both precise address accuracy and immediate access to configuration parameters
Solution Approach 2:
The patent uses copying by creating simplified copies of the complex register address calculation logic within the UEFI shell application. Instead of requiring users to perform calculations, the application contains pre-computed address mappings and configuration templates that can be directly applied, maintaining precision while dramatically reducing operational complexity
3Adaptability or versatility
If GPIO register settings are changed, then GPIO functionality is updated, but the settings are reset to default values after system reboot
Solution Approach 1:
The patent implements preliminary action by establishing a configuration persistence mechanism in the UEFI firmware that saves GPIO register settings to non-volatile storage during system initialization. This ensures that customized GPIO configurations are preserved across reboots while maintaining the ability to adapt functionality through user modifications
Solution Approach 2:
The patent applies feedback by implementing a configuration management system in the UEFI shell that monitors and tracks GPIO register changes. When settings are modified, the system automatically saves the new configuration values to persistent storage and provides feedback to the user about the saved changes, ensuring configuration stability while allowing functional adaptability
Data Source
AI summary
An operation method of a software program meeting UEFI specifications for configuring a GPIO port is provided. The operation method includes: operating in a command-line mode to display, on a display device, a first prompt for guiding a user to input a string of command-line arguments; in response to receipt of a string of command-line arguments for reading content stored in a register that corresponds to one of GPIO pins of the GPIO port under the command-line mode, displaying, on the display device, a default value of the register that corresponds to a function of said one of the GPIO pins; and in response to receipt of a string of command-line arguments for setting a register that corresponds to one of the GPIO pins to a set value under the command-line mode, writing the set value to the register to replace a current value with the set value.