This repository implements stm32 drivers for adc, using hardware trigger and dma. When you call adc_read_async the adc will start to read the samples to a buffer using dma in circular buffer mode.

Each adc conversion will start after hardware trigger event has occurred. In the current implemenation, we also provide a hardware trigger using a timer (I used a patch to the pwm driver because of my lazyness). Look at the dts/bindings on how to configure the driver.

The dma interrupt will occur on half transmission, which is after half of the size of the buffer given in adc_read_async was filled. After that the application will send the samples over usb.