nrfconnect/sdk-zephyr
Nov 2025 – Dec 2025
2 Months active
Languages Used
C
Technical Skills
C programmingdriver developmentembedded systemsfirmware developmentreal-time systems
Adrien Lessard
PROFILE
Adrien Lessard
Worked on reliability and stability improvements for the nrfconnect/sdk-zephyr project, focusing on STM32 driver development in embedded C. Addressed a power management deadlock in the STM32 serial driver by ensuring the rx_woken state could not lock power management when the non-async API was used, reducing the risk of indefinite lockups. Delivered a fix for the STM32 RTC subsecond register, implementing a loop to read until two consecutive values matched, which improved timekeeping accuracy under edge conditions. Demonstrated expertise in C programming, embedded systems, and real-time firmware development, with careful adherence to hardware reference manuals and strong code traceability.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
3Total
Bugs
2
Commits
3
Features
0
Lines of code
39
Activity Months2
Your Network
778 peopleShared Repositories
778
Work History
December 2025
2 Commits
Dec 1, 2025December 2025 monthly summary for nrfconnect/sdk-zephyr: Delivered a critical RTC subsecond register read stabilization to ensure accurate timekeeping under edge conditions. Implemented a loop to read the STM32 RTC subseconds register until two consecutive values match, addressing potential inaccuracies when BYPSHAD is set. The fix was implemented via two commits (2cc9d794dc9803cbb5bb92bf9399ad5b8535be52 and 9929ac33f4f9fdeba2912b4294c7f146dffacf73). This work improves system time integrity across devices, reduces flaky time-based behavior, and strengthens low-level driver reliability. Demonstrated proficiency in embedded C, STM32 RTC, and driver development, with strong Git traceability and adherence to hardware reference manuals.
2 Commits
Dec 1, 2025December 2025 monthly summary for nrfconnect/sdk-zephyr: Delivered a critical RTC subsecond register read stabilization to ensure accurate timekeeping under edge conditions. Implemented a loop to read the STM32 RTC subseconds register until two consecutive values match, addressing potential inaccuracies when BYPSHAD is set. The fix was implemented via two commits (2cc9d794dc9803cbb5bb92bf9399ad5b8535be52 and 9929ac33f4f9fdeba2912b4294c7f146dffacf73). This work improves system time integrity across devices, reduces flaky time-based behavior, and strengthens low-level driver reliability. Demonstrated proficiency in embedded C, STM32 RTC, and driver development, with strong Git traceability and adherence to hardware reference manuals.
December 2025
November 2025
1 Commits
Nov 1, 2025Month 2025-11: Reliability improvement in the STM32 serial driver within nrfconnect/sdk-zephyr. Implemented a fix to prevent rx_woken from locking the power management state when the non-async API is not used, reducing PM deadlocks and improving stability across STM32-based configurations.
November 2025
1 Commits
Nov 1, 2025Month 2025-11: Reliability improvement in the STM32 serial driver within nrfconnect/sdk-zephyr. Implemented a fix to prevent rx_woken from locking the power management state when the non-async API is not used, reducing PM deadlocks and improving stability across STM32-based configurations.
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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 programmingdriver developmentembedded systemsfirmware developmentreal-time systems
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