microsoft/mu_basecore
Apr 2026 – Apr 2026
1 Month active
Languages Used
C
Technical Skills
C programmingembedded systemsfirmware development
capohuang
PROFILE
Capohuang
Worked on the microsoft/mu_basecore repository to address a critical bug in VirtualRealTimeClockLib, focusing on accurate handling of negative timezone offsets in embedded firmware. Applied C programming and embedded systems expertise to resolve a signed versus unsigned comparison issue that previously led to incorrect local time calculations during shutdown, hibernate, and cold boot scenarios. The solution involved careful debugging and code review, followed by end-to-end validation using UEFI shell and operating system checks across UTC+ time zones. This work improved the reliability of RTC calculations, reduced risks of time desynchronization, and enhanced scheduling and logging consistency across power transitions.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
1Total
Bugs
1
Commits
1
Features
0
Lines of code
2,416,780
Activity Months1
Your Network
144 peopleShared Repositories
144
Aaron AntoneMember
Aaron PopMember
Abdul Lateef AttarMember
Alok KulkarniMember
Alex HaydockMember
Amy ChanMember
Ansen HuangMember
Antaeus Kleinert-StrandMember
“anupriyak“Member
Work History
April 2026
1 Commits
Apr 1, 2026April 2026 monthly summary: Delivered a critical fix in VirtualRealTimeClockLib to correctly handle negative TimeZone offsets, ensuring accurate RTC calculations across power transitions and different time zones. The change fixes a signed/unsigned comparison bug that could miscalculate local time for negative offsets (e.g., UTC+8) during shutdown/hibernate and cold boot. The work was implemented in EmbeddedPkg/VirtualRealTimeClockLib with commit d874d86555f3ad54cde7e18910dde4e7786b2499 and co-authored by Capo Huang. Validation included end-to-end testing by setting UTC+8 and verifying RTC consistency in the UEFI shell and OS after power cycles. Impact: reduces time desynchronization risks, improves reliability of time-based scheduling and logging across zones, and enhances user experience during power transitions. Technologies/skills demonstrated: C, UEFI firmware, RTC/timezone handling, debugging, code review, and cross-team collaboration.
1 Commits
Apr 1, 2026April 2026 monthly summary: Delivered a critical fix in VirtualRealTimeClockLib to correctly handle negative TimeZone offsets, ensuring accurate RTC calculations across power transitions and different time zones. The change fixes a signed/unsigned comparison bug that could miscalculate local time for negative offsets (e.g., UTC+8) during shutdown/hibernate and cold boot. The work was implemented in EmbeddedPkg/VirtualRealTimeClockLib with commit d874d86555f3ad54cde7e18910dde4e7786b2499 and co-authored by Capo Huang. Validation included end-to-end testing by setting UTC+8 and verifying RTC consistency in the UEFI shell and OS after power cycles. Impact: reduces time desynchronization risks, improves reliability of time-based scheduling and logging across zones, and enhances user experience during power transitions. Technologies/skills demonstrated: C, UEFI firmware, RTC/timezone handling, debugging, code review, and cross-team collaboration.
April 2026
Activity
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Quality Metrics
Correctness100.0%
Maintainability80.0%
Architecture80.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C
Technical Skills
C programmingembedded systemsfirmware development
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