Summary

In this chapter, we learned about DMA, an important feature in microcontrollers for enhancing data throughput and offloading the CPU from routine data transfer tasks. We began by discussing the basic principles of DMA, emphasizing its role in high-performance embedded systems. We explored how DMA works and its significance in improving system efficiency, by allowing peripherals to transfer data directly to and from memory without continuous CPU intervention.

Then, we focused on the STM32F4 implementation of the DMA controller, examining its key features and configuration options. We detailed the structure of the DMA controller, including its channels, streams, and key registers, such as the Stream Configuration Register (DMA_SxCR), Stream Number of Data Register (DMA_SxNDTR), Stream Peripheral Address Register (DMA_SxPAR), and Stream Memory Address Registers (DMA_SxM0AR and DMA_SxM1AR). This provided a comprehensive understanding of how to configure and control DMA for various...