Direct Memory Access (DMA) and Peripheral Interfaces Questions

Understanding DMA controllers: how to set up DMA transfers, trigger mechanisms (timer, interrupt, or software triggered), interrupt handling for DMA completion. DMA limitations and constraints: alignment requirements, burst sizes, buffer management. Efficient data movement: using DMA for I/O-heavy operations to reduce CPU load. Common peripheral interfaces: UART with DMA, SPI transfers, memory-to-memory DMA. Avoiding DMA-related bugs: buffer coherency, incomplete transfers, and descriptor management.