From 576fb23faabf6df7f2c9ed2039e94d3586a3788f Mon Sep 17 00:00:00 2001
From: Elias Hanelt <eliash@beecorp.ai>
Date: Thu, 6 Nov 2025 17:04:20 -0800
Subject: add bidi mode to spi

---
 embassy-stm32/src/spi/mod.rs | 46 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/embassy-stm32/src/spi/mod.rs b/embassy-stm32/src/spi/mod.rs
index abb80ed26..89553f129 100644
--- a/embassy-stm32/src/spi/mod.rs
+++ b/embassy-stm32/src/spi/mod.rs
@@ -54,6 +54,16 @@ pub enum BitOrder {
     MsbFirst,
 }
 
+/// SPI Direction.
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
+pub enum Direction {
+    /// Transmit
+    Transmit,
+    /// Receive
+    Receive,
+}
+
 /// SPI configuration.
 #[non_exhaustive]
 #[derive(Copy, Clone)]
@@ -348,6 +358,19 @@ impl<'d, M: PeriMode, CM: CommunicationMode> Spi<'d, M, CM> {
         Ok(())
     }
 
+    /// Set SPI direction
+    pub fn set_direction(&mut self, dir: Option<Direction>) {
+        let (bidimode, bidioe) = match dir {
+            Some(Direction::Transmit) => (vals::Bidimode::BIDIRECTIONAL, vals::Bidioe::TRANSMIT),
+            Some(Direction::Receive) => (vals::Bidimode::BIDIRECTIONAL, vals::Bidioe::RECEIVE),
+            None => (vals::Bidimode::UNIDIRECTIONAL, vals::Bidioe::TRANSMIT),
+        };
+        self.info.regs.cr1().modify(|w| {
+            w.set_bidimode(bidimode);
+            w.set_bidioe(bidioe);
+        });
+    }
+
     /// Get current SPI configuration.
     pub fn get_current_config(&self) -> Config {
         #[cfg(any(spi_v1, spi_v2, spi_v3))]
@@ -708,6 +731,29 @@ impl<'d> Spi<'d, Async, Master> {
         )
     }
 
+    /// Create a new SPI driver, in bidirectional mode
+    pub fn new_bidi<T: Instance, #[cfg(afio)] A>(
+        peri: Peri<'d, T>,
+        sck: Peri<'d, if_afio!(impl SckPin<T, A>)>,
+        sdio: Peri<'d, if_afio!(impl MosiPin<T, A>)>,
+        tx_dma: Peri<'d, impl TxDma<T>>,
+        rx_dma: Peri<'d, impl RxDma<T>>,
+        config: Config,
+    ) -> Self {
+        let mut this = Self::new_inner(
+            peri,
+            new_pin!(sck, config.sck_af()),
+            new_pin!(sdio, AfType::output(OutputType::PushPull, config.gpio_speed)),
+            None,
+            None,
+            new_dma!(tx_dma),
+            new_dma!(rx_dma),
+            config,
+        );
+        this.set_direction(Some(Direction::Transmit));
+        this
+    }
+
     /// Create a new SPI driver, in TX-only mode, without SCK pin.
     ///
     /// This can be useful for bit-banging non-SPI protocols.
-- 
cgit 


From 88ce8314c5cd653ac245cc5dbf367f6814f24be9 Mon Sep 17 00:00:00 2001
From: Elias Hanelt <eliash@beecorp.ai>
Date: Wed, 26 Nov 2025 10:08:13 -0800
Subject: fix i2c slave RX early termination handling

---
 embassy-stm32/src/i2c/v2.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/embassy-stm32/src/i2c/v2.rs b/embassy-stm32/src/i2c/v2.rs
index b2ba94e21..6b213484c 100644
--- a/embassy-stm32/src/i2c/v2.rs
+++ b/embassy-stm32/src/i2c/v2.rs
@@ -1600,7 +1600,8 @@ impl<'d, M: Mode> I2c<'d, M, MultiMaster> {
             for byte in chunk {
                 // Wait until we have received something
                 match self.wait_rxne(timeout) {
-                    Ok(ReceiveResult::StopReceived) | Ok(ReceiveResult::NewStart) => {
+                    Ok(ReceiveResult::StopReceived) => {}
+                    Ok(ReceiveResult::NewStart) => {
                         trace!("--- Slave RX transmission end (early)");
                         return Ok(total_len - remaining_len); // Return N bytes read
                     }
-- 
cgit 


From dd0a3a1f0b183b547a3fc574c8ddf82703ecb10e Mon Sep 17 00:00:00 2001
From: Elias Hanelt <eliash@beecorp.ai>
Date: Fri, 28 Nov 2025 12:09:26 -0800
Subject: modify changelog

---
 embassy-stm32/CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/embassy-stm32/CHANGELOG.md b/embassy-stm32/CHANGELOG.md
index 2b273482c..2a99d0a96 100644
--- a/embassy-stm32/CHANGELOG.md
+++ b/embassy-stm32/CHANGELOG.md
@@ -85,6 +85,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - fix: build script ensures EXTI2_TSC is listed as the IRQ of EXTI2 even if the PAC doesn't
 - feat: stm32/lcd: added implementation
 - change: add error messages to can timing calculations ([#4961](https://github.com/embassy-rs/embassy/pull/4961))
+- fix: stm32/i2c v2: add stop flag on stop received
 
 ## 0.4.0 - 2025-08-26
 
-- 
cgit