547a5e9eb0
This commit adds the asynchronous UART API testing support on the SAM R21 Xplained Pro board. The SERCOM3 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 SERCOM3 UART TX and RX pads are configured to be internally connected; it is, however, still necessary to configure the pinmux because the module pads are not connected until the pinmux is configured. Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
16 lines
318 B
Plaintext
16 lines
318 B
Plaintext
/* SPDX-License-Identifier: Apache-2.0 */
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&sercom3 {
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status = "okay";
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compatible = "atmel,sam0-uart";
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current-speed = <115200>;
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/* Internally loop-back TX and RX on PAD0 */
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rxpo = <0>;
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txpo = <0>;
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/* Configure DMA channels for async operation */
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dmas = <&dmac 0 7>, <&dmac 1 8>;
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dma-names = "rx", "tx";
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};
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