title: STM32 ADC DMA Double/Multi Buffer example
body: <p>According to documentation, many of STM32's supports DMA in Double-Buffer (or also known as Multi-Buffer) mode. In HAL, there are two functions for this feature: <code>HAL_DMAEx_MultiBufferStart</code> and <code>HAL_DMAEx_MultiBufferStart_IT</code> in <code>stm32xxxx_hal_adc_ex</code> file. But in any SDK (H7, F7, F4 etc.), there are not single example of usage of those two functions. How to get this double-buffering DMA working together with ADC?</p>