Lena Boeckmann focused on stabilizing DMA pathways for the CC310 hardware in the zephyrproject-rtos/trusted-firmware-m repository, addressing a critical synchronization issue in embedded systems. She improved the driver’s reliability by replacing the generic SYM_DMA_COMPLETED wait with direction-specific interrupts, ensuring correct signaling for symmetric DMA operations even when SYM_DMA_COMPLETED was unavailable. This approach reduced race conditions and prevented stalls in DMA-heavy workloads, enhancing the robustness of trusted firmware. Lena’s work, implemented in C and leveraging her expertise in driver development and hardware interaction, demonstrated a deep understanding of low-level synchronization challenges and contributed to more reliable embedded system performance.