Worked on stabilizing DMA pathways for the CC310 hardware module within the zephyrproject-rtos/trusted-firmware-m repository, focusing on embedded systems and driver development using C. Addressed a synchronization issue 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 improved reliability for DMA-heavy workloads in trusted firmware. The solution involved careful hardware interaction, specifically distinguishing between DOUT_TO_MEM_INT and MEM_TO_DIN_INT events, and was fully traceable to a dedicated commit, reflecting a targeted and in-depth bug fix over the month.