iuart_idle_detect_sdma_transfer
Overview
The uart_idle_detect_sdma example shows how to use uart driver in sdma way:
In this example, one uart instance connect to PC through uart, the board will send back all characters that PC send to the board.
Uart will receive 8 characters every time, but if the character is less then 8, the idle line interrupt will generate, and abort the SDMA receive operation, and send out the received characters.