STM32 ADC DMA

STM32 ADC DMA (Direct Memory Access) is a feature of STM32 microcontrollers that allows the ADC to directly transfer data to memory without CPU intervention. This means that the ADC can sample and convert multiple analog signals in the background and store the results in memory without the need for the CPU to manually read and store each value.

The DMA controller is responsible for managing the data transfer between the ADC and memory. It uses a DMA channel to transfer the data, which can be configured to transfer a certain number of samples or to continuously transfer data. This frees up the CPU to perform other tasks while the ADC is running, which can improve the overall performance of the system.

To use ADC DMA in STM32 microcontrollers, the ADC and DMA peripherals need to be configured correctly. The ADC needs to be set up to sample the analog signals and trigger the DMA transfer, while the DMA controller needs to be configured to transfer the data to the desired memory location.

Once the ADC DMA is set up, the system can continuously sample and convert analog signals and store the results in memory without CPU intervention. This can be useful in applications that require continuous monitoring of multiple analog signals, such as in data acquisition systems or sensor networks.