March 2026 performance summary focused on delivering high-value features, fixing critical issues, and enabling expanded storage capabilities for embedded deployments. The work emphasizes reliability, maintainability, and architectural alignment across Phoenix RTOS subsystems, supporting PP-428.

February 2026 monthly summary: Delivered kernel robustness enhancements, MISRA 2012 safety-compliance improvements, and expanded UART capabilities across Phoenix RTOS components. Strengthened reliability for exception handling, pursued safety standards, and broadened serial interface options to support two-stop bits and half-duplex operation. This work enhances stability for deployed devices and enables interoperable configurations in embedded deployments.

In 2026-01, delivered Platform NPU Cache AXI Management API for the phoenix-rtos-kernel, introducing four new platform calls to control the NPU Cache AXI and associated platformctl_t structs. The API supports invalidate, clean, combined invalidate+clean, and enable/disable operations (pctl_invalAXICache, pctl_cleanAXICache, pctl_cleanInvalAXICache, pctl_enableAXICache) with platform-level integration (opAXICache and opEnable). This work is tracked under PP-418. No separate bug fixes were documented; primary focus was API extension to facilitate future NPU performance optimizations and reliability.

December 2025 monthly summary for phoenix-rtos/phoenix-rtos-kernel: Delivered RISAF NPU initialization and configuration to enable robust AXI cache region setup and memory access timing controlled by board_config. Introduced conditional clocks and initialization order: initialise NPU clock before RISAF region configuration when NPU macro is defined, and initialise AXI cache clocks prior to RISAF configuration. These changes improve performance, stability, and resource management for RISAF-enabled STM32N6 targets. JIRA PP-418 references tracked across commits.