UART Tx data using Poll Interrupt and DMA in STM32
The data is transmitted in blocking mode i.e the CPU will block every other operation until the data transfer is complete.
Receive UART data using DMA and IDLE line detection
UART have a feature called IDLE line detection and we are going to use this to sole the problem mentioned above. Idle line is detected on RX line when there is no received byte for more than 1 byte time length.