Worked on the OpenSiFli/SiFli-SDK repository to deliver hardware-variant aware audio codec PLL configuration supporting both SF32LB52X and SF32LB57X chips. The approach centered on using C and embedded systems techniques, introducing conditional compilation and register setup to accommodate variant-specific requirements. Centralized logic through macros improved maintainability and reduced integration risk, while conditional clock divider configuration ensured correct digital clock output across hardware variants. The work emphasized code quality and traceability, with thorough documentation of changes to support future releases. No bugs were fixed during this period, but the feature enhanced deployment speed and maintainability for hardware abstraction layer development.