Zephyr4Microchip/zephyr
Feb 2026 – Feb 2026
1 Month active
Languages Used
C
Technical Skills
C programmingdriver developmentembedded systems
Anuj Paudel
PROFILE
Anuj Paudel
Anuj Paudel enhanced the Zephyr4Microchip/zephyr repository by addressing a critical bug in the PCF8563 RTC driver, focusing on accurate BCD encoding and decoding for 2-digit year values. He implemented logic to correctly convert between tm_year and the chip’s expected 0-99 range, resolving a longstanding 100-year offset issue in timekeeping. Using C and embedded systems expertise, Anuj validated the fix through Renode-based hardware-in-the-loop simulations across multiple years, ensuring robust and reliable timestamp handling. His work improved logging accuracy and scheduling reliability for long-running deployments, demonstrating depth in driver development, kernel-style bug signaling, and rigorous code review practices.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
1Total
Bugs
1
Commits
1
Features
0
Lines of code
3
Activity Months1
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Work History
February 2026
1 Commits
Feb 1, 2026February 2026: Delivered a critical RTC reliability improvement in Zephyr by fixing the PCF8563 RTC Year Offset bug related to BCD handling. The patch corrects BCD encoding/decoding for 2-digit years, eliminating a 100-year offset when reading/writing time. This aligns with the DS1307 driver pattern, using modulo-100 for set and +100 for get to match the chip's expectations. Verified via Renode simulations across representative years (2000, 2026, 2050, 2099) with valid BCD values, ensuring robust timekeeping. Impact: enhances logging accuracy, scheduling reliability, and timestamp integrity in long-running deployments; reduces maintenance risk and user support overhead. Tech stack and skills demonstrated: C/Zephyr RTC driver development, BCD encoding/decoding, hardware-in-the-loop testing with Renode, code review discipline, and kernel-style signaling for bug fixes.
1 Commits
Feb 1, 2026February 2026: Delivered a critical RTC reliability improvement in Zephyr by fixing the PCF8563 RTC Year Offset bug related to BCD handling. The patch corrects BCD encoding/decoding for 2-digit years, eliminating a 100-year offset when reading/writing time. This aligns with the DS1307 driver pattern, using modulo-100 for set and +100 for get to match the chip's expectations. Verified via Renode simulations across representative years (2000, 2026, 2050, 2099) with valid BCD values, ensuring robust timekeeping. Impact: enhances logging accuracy, scheduling reliability, and timestamp integrity in long-running deployments; reduces maintenance risk and user support overhead. Tech stack and skills demonstrated: C/Zephyr RTC driver development, BCD encoding/decoding, hardware-in-the-loop testing with Renode, code review discipline, and kernel-style signaling for bug fixes.
February 2026
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Quality Metrics
Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance100.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C
Technical Skills
C programmingdriver developmentembedded systems
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