Month: 2026-01 Concise monthly summary focusing on business value and technical achievement for Zephyr project. Key activity centered on stabilizing the RW61x DAC path to ensure correct voltage outputs and predictable hardware behavior. Key features delivered: - None new feature introduced; delivered a critical bug fix in the DAC subsystem to ensure accurate voltage output for RW61x devices by correcting output-voltage-range mapping. Major bugs fixed: - RW61x DAC Voltage Range Mapping Correction: Fixed incorrect mapping of device-tree voltage range indices to SDK values, ensuring accurate voltage output on RW61x DACs. Commit: c73e59c5f4ca0742512a8278e337b6762f51bc38 (Signed-off-by: Tomas Groth Christensen). Overall impact and accomplishments: - Increased hardware reliability and customer trust for RW61x deployments by eliminating voltage output discrepancies. This reduces risk of miscalibrated hardware in production and simplifies integration with existing device-tree configurations. - Improved maintainability and traceability with explicit commit references and signed-off changes. Technologies/skills demonstrated: - Device-tree range index mapping and DAC driver (MCUX_GAU) integration - Kernel and driver patching within Zephyr project - Code review practices, sign-off adherence, and cross-team collaboration

June 2025: Focused on delivering a high-impact timer capability and strengthening long-running application reliability in AmbiqMicro/ambiqzephyr. Key feature delivered: MCUX_OS_TIMER now supports 64-bit cycle counters by enabling TIMER_HAS_64BIT_CYCLE_COUNTER in Kconfig, enabling more precise and robust timing for extended workloads. This work is backed by a clean, traceable commit and lays the foundation for future timer-driven improvements.