tests: uart_async_api: Support atsamd21_xpro board #24588
Merged
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This commit adds the asynchronous UART API testing support on the SAM
D21 Xplained Pro board.
The SERCOM1 module is used as the secondary loop-back UART, which is
required to run this test.
Note that no external UART loop-back connection is necessary to run
this test, because the SERCOM1 UART TX and RX pads are configured to be
internally connected.
Signed-off-by: Stephanos Ioannidis [email protected]
To be rebased on top of #24572 (blocked by #24572).Done