From e7a6721b7fc786b5e7dfa5f7fd9883f0943b47e4 Mon Sep 17 00:00:00 2001 From: skoocda Date: Wed, 17 Apr 2024 20:50:51 -0600 Subject: [PATCH] Clarifying documentation in USART chapter. --- f3discovery/src/11-usart/README.md | 3 +++ 1 file changed, 3 insertions(+) diff --git a/f3discovery/src/11-usart/README.md b/f3discovery/src/11-usart/README.md index d03148d4e..44112102b 100644 --- a/f3discovery/src/11-usart/README.md +++ b/f3discovery/src/11-usart/README.md @@ -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).