From c0addc005bb3859436cb1c2931b41a7065703077 Mon Sep 17 00:00:00 2001
From: Lucas Martins <lmartins@tractian.com>
Date: Mon, 21 Oct 2024 14:48:57 -0300
Subject: [PATCH 1/3] add uart permutations usefull for rs485

---
 embassy-stm32/src/usart/buffered.rs | 49 +++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/embassy-stm32/src/usart/buffered.rs b/embassy-stm32/src/usart/buffered.rs
index 4fbe33b2e..03c0934f9 100644
--- a/embassy-stm32/src/usart/buffered.rs
+++ b/embassy-stm32/src/usart/buffered.rs
@@ -246,6 +246,55 @@ impl<'d> BufferedUart<'d> {
         )
     }
 
+
+    /// Create a new bidirectional buffered UART driver with only RTS pin as the DE pin
+    pub fn new_with_rts_as_de<T: Instance>(
+        peri: impl Peripheral<P = T> + 'd,
+        _irq: impl interrupt::typelevel::Binding<T::Interrupt, InterruptHandler<T>> + 'd,
+        rx: impl Peripheral<P = impl RxPin<T>> + 'd,
+        tx: impl Peripheral<P = impl TxPin<T>> + 'd,
+        rts: impl Peripheral<P = impl RtsPin<T>> + 'd,
+        tx_buffer: &'d mut [u8],
+        rx_buffer: &'d mut [u8],
+        config: Config,
+    ) -> Result<Self, ConfigError> {
+        Self::new_inner(
+            peri,
+            new_pin!(rx, AfType::input(Pull::None)),
+            new_pin!(tx, AfType::output(OutputType::PushPull, Speed::Medium)),
+            None,
+            None,
+            new_pin!(rts, AfType::input(Pull::None)), // RTS mapped used as DE
+            tx_buffer,
+            rx_buffer,
+            config,
+        )
+    }
+
+    /// Create a new bidirectional buffered UART driver with only the request-to-send pin
+    pub fn new_with_rts<T: Instance>(
+        peri: impl Peripheral<P = T> + 'd,
+        _irq: impl interrupt::typelevel::Binding<T::Interrupt, InterruptHandler<T>> + 'd,
+        rx: impl Peripheral<P = impl RxPin<T>> + 'd,
+        tx: impl Peripheral<P = impl TxPin<T>> + 'd,
+        rts: impl Peripheral<P = impl RtsPin<T>> + 'd,
+        tx_buffer: &'d mut [u8],
+        rx_buffer: &'d mut [u8],
+        config: Config,
+    ) -> Result<Self, ConfigError> {
+        Self::new_inner(
+            peri,
+            new_pin!(rx, AfType::input(Pull::None)),
+            new_pin!(tx, AfType::output(OutputType::PushPull, Speed::Medium)),
+            new_pin!(rts, AfType::input(Pull::None)),
+            None, // no RTS
+            None, // no DE
+            tx_buffer,
+            rx_buffer,
+            config,
+        )
+    }
+
     /// Create a new bidirectional buffered UART driver with a driver-enable pin
     #[cfg(not(any(usart_v1, usart_v2)))]
     pub fn new_with_de<T: Instance>(

From 2c9b528edde491ca1ed02234805212c78e2a6bd7 Mon Sep 17 00:00:00 2001
From: Lucas Martins <lmartins@tractian.com>
Date: Mon, 21 Oct 2024 15:06:06 -0300
Subject: [PATCH 2/3] fmt

---
 embassy-stm32/src/usart/buffered.rs | 1 -
 1 file changed, 1 deletion(-)

diff --git a/embassy-stm32/src/usart/buffered.rs b/embassy-stm32/src/usart/buffered.rs
index 03c0934f9..edaf41be9 100644
--- a/embassy-stm32/src/usart/buffered.rs
+++ b/embassy-stm32/src/usart/buffered.rs
@@ -246,7 +246,6 @@ impl<'d> BufferedUart<'d> {
         )
     }
 
-
     /// Create a new bidirectional buffered UART driver with only RTS pin as the DE pin
     pub fn new_with_rts_as_de<T: Instance>(
         peri: impl Peripheral<P = T> + 'd,

From 82772e3a8f36b31052ca46af3947ba253458bef1 Mon Sep 17 00:00:00 2001
From: Lucas Martins <lmartins@tractian.com>
Date: Mon, 21 Oct 2024 17:50:05 -0300
Subject: [PATCH 3/3] :memo: fix wrong comment

---
 embassy-stm32/src/usart/buffered.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/embassy-stm32/src/usart/buffered.rs b/embassy-stm32/src/usart/buffered.rs
index edaf41be9..7ba209063 100644
--- a/embassy-stm32/src/usart/buffered.rs
+++ b/embassy-stm32/src/usart/buffered.rs
@@ -246,7 +246,7 @@ impl<'d> BufferedUart<'d> {
         )
     }
 
-    /// Create a new bidirectional buffered UART driver with only RTS pin as the DE pin
+    /// Create a new bidirectional buffered UART driver with only the RTS pin as the DE pin
     pub fn new_with_rts_as_de<T: Instance>(
         peri: impl Peripheral<P = T> + 'd,
         _irq: impl interrupt::typelevel::Binding<T::Interrupt, InterruptHandler<T>> + 'd,
@@ -286,7 +286,7 @@ impl<'d> BufferedUart<'d> {
             new_pin!(rx, AfType::input(Pull::None)),
             new_pin!(tx, AfType::output(OutputType::PushPull, Speed::Medium)),
             new_pin!(rts, AfType::input(Pull::None)),
-            None, // no RTS
+            None, // no CTS
             None, // no DE
             tx_buffer,
             rx_buffer,