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Clarifying documentation in USART chapter. #565

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Apr 18, 2024
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Clarifying documentation in USART chapter. #565

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3 changes: 3 additions & 0 deletions f3discovery/src/11-usart/README.md
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Expand Up @@ -18,6 +18,9 @@ If you have a newer revision of the board and are using the on-board USB <->
Serial functionality then the `auxiliary` crate will set pin `PC4` as the TX
line and pin `PC5` as the RX line.

If you had previously connected the PC4 and PC4 pins in order to test the [loopback functionality](../10-serial-communication/loopbacks.md) in the previous section,
make sure to remove that wire, or the upcoming serial communication will fail silently.

Everything is already wired on the board so you don't need to wire anything yourself.
You can move on to the [next section](send-a-single-byte.html).

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