13 files changed, 238 insertions, 86 deletions

diff --git a/embassy-stm32/src/can/bxcan.rs b/embassy-stm32/src/can/bxcan.rs
index 9e10a8b02..b73b88391 100644
--- a/embassy-stm32/src/can/bxcan.rs
+++ b/embassy-stm32/src/can/bxcan.rs
@@ -5,7 +5,7 @@ use embassy::util::Unborrow;
 use embassy_hal_common::unborrow;
 
 use crate::gpio::{
-    sealed::OutputType::{OpenDrain, PushPull},
+    sealed::AFType::{OutputOpenDrain, OutputPushPull},
     Pin,
 };
 use crate::{peripherals, rcc::RccPeripheral};
@@ -26,8 +26,8 @@ impl<'d, T: Instance + bxcan::Instance> Can<'d, T> {
         unborrow!(peri, rx, tx);
 
         unsafe {
-            rx.set_as_af(rx.af_num(), OpenDrain);
-            tx.set_as_af(tx.af_num(), PushPull);
+            rx.set_as_af(rx.af_num(), OutputOpenDrain);
+            tx.set_as_af(tx.af_num(), OutputPushPull);
         }
 
         T::enable();
diff --git a/embassy-stm32/src/eth/v2/mod.rs b/embassy-stm32/src/eth/v2/mod.rs
index 8eb7c3393..001ac3154 100644
--- a/embassy-stm32/src/eth/v2/mod.rs
+++ b/embassy-stm32/src/eth/v2/mod.rs
@@ -10,7 +10,7 @@ use embassy_net::{Device, DeviceCapabilities, LinkState, PacketBuf, MTU};
 
 use crate::gpio::sealed::Pin as __GpioPin;
 use crate::gpio::Pin as GpioPin;
-use crate::gpio::{sealed::OutputType::PushPull, AnyPin};
+use crate::gpio::{sealed::AFType::OutputPushPull, AnyPin};
 use crate::pac::gpio::vals::Ospeedr;
 use crate::pac::{ETH, RCC, SYSCFG};
 use crate::peripherals;
@@ -416,7 +416,7 @@ macro_rules! impl_pin {
             fn configure(&mut self) {
                 // NOTE(unsafe) Exclusive access to the registers
                 critical_section::with(|_| unsafe {
-                    self.set_as_af($af, PushPull);
+                    self.set_as_af($af, OutputPushPull);
                     self.block()
                         .ospeedr()
                         .modify(|w| w.set_ospeedr(self.pin() as usize, Ospeedr::VERYHIGHSPEED));
diff --git a/embassy-stm32/src/gpio.rs b/embassy-stm32/src/gpio.rs
index c7b644e94..246cdb041 100644
--- a/embassy-stm32/src/gpio.rs
+++ b/embassy-stm32/src/gpio.rs
@@ -350,12 +350,13 @@ impl<'d, T: Pin> InputPin for OutputOpenDrain<'d, T> {
 pub(crate) mod sealed {
     use super::*;
 
-    /// Output type settings
+    /// Alternate function type settings
     #[derive(Debug)]
     #[cfg_attr(feature = "defmt", derive(defmt::Format))]
-    pub enum OutputType {
-        PushPull,
-        OpenDrain,
+    pub enum AFType {
+        Input,
+        OutputPushPull,
+        OutputOpenDrain,
     }
 
     pub trait Pin {
@@ -394,21 +395,47 @@ pub(crate) mod sealed {
         }
 
         #[cfg(gpio_v1)]
-        unsafe fn set_as_af(&self, _af_num: u8, _af_type: OutputType) {
-            panic!("F1 alternate GPIO functions not supported yet!");
+        unsafe fn set_as_af(&self, _af_num: u8, af_type: AFType) {
+            // F1 uses the AFIO register for remapping.
+            // For now, this is not implemented, so af_num is ignored
+            // _af_num should be zero here, since it is not set by stm32-data
+            let r = self.block();
+            let n = self._pin() as usize;
+            let crlh = if n < 8 { 0 } else { 1 };
+            match af_type {
+                AFType::Input => {
+                    r.cr(crlh).modify(|w| {
+                        w.set_mode(n % 8, vals::Mode::INPUT);
+                        w.set_cnf(n % 8, vals::Cnf::PUSHPULL);
+                    });
+                }
+                AFType::OutputPushPull => {
+                    r.cr(crlh).modify(|w| {
+                        w.set_mode(n % 8, vals::Mode::OUTPUT50);
+                        w.set_cnf(n % 8, vals::Cnf::ALTPUSHPULL);
+                    });
+                }
+                AFType::OutputOpenDrain => {
+                    r.cr(crlh).modify(|w| {
+                        w.set_mode(n % 8, vals::Mode::OUTPUT50);
+                        w.set_cnf(n % 8, vals::Cnf::ALTOPENDRAIN);
+                    });
+                }
+            }
         }
         #[cfg(gpio_v2)]
-        unsafe fn set_as_af(&self, af_num: u8, af_type: OutputType) {
+        unsafe fn set_as_af(&self, af_num: u8, af_type: AFType) {
             let pin = self._pin() as usize;
             let block = self.block();
             block
                 .afr(pin / 8)
                 .modify(|w| w.set_afr(pin % 8, vals::Afr(af_num)));
             match af_type {
-                OutputType::PushPull => {
+                AFType::Input => {}
+                AFType::OutputPushPull => {
                     block.otyper().modify(|w| w.set_ot(pin, vals::Ot::PUSHPULL))
                 }
-                OutputType::OpenDrain => block
+                AFType::OutputOpenDrain => block
                     .otyper()
                     .modify(|w| w.set_ot(pin, vals::Ot::OPENDRAIN)),
             }
diff --git a/embassy-stm32/src/i2c/mod.rs b/embassy-stm32/src/i2c/mod.rs
index 4af5051db..e922fe429 100644
--- a/embassy-stm32/src/i2c/mod.rs
+++ b/embassy-stm32/src/i2c/mod.rs
@@ -96,7 +96,6 @@ crate::pac::interrupts!(
     };
 );
 
-#[cfg(not(rcc_f1))]
 macro_rules! impl_pin {
     ($inst:ident, $pin:ident, $signal:ident, $af:expr) => {
         impl $signal<peripherals::$inst> for peripherals::$pin {}
@@ -109,6 +108,7 @@ macro_rules! impl_pin {
     };
 }
 
+#[cfg(not(rcc_f1))]
 crate::pac::peripheral_pins!(
     ($inst:ident, i2c, I2C, $pin:ident, SDA, $af:expr) => {
         impl_pin!($inst, $pin, SdaPin, $af);
@@ -119,6 +119,17 @@ crate::pac::peripheral_pins!(
     };
 );
 
+#[cfg(rcc_f1)]
+crate::pac::peripheral_pins!(
+    ($inst:ident, i2c, I2C, $pin:ident, SDA) => {
+        impl_pin!($inst, $pin, SdaPin, 0);
+    };
+
+    ($inst:ident, i2c, I2C, $pin:ident, SCL) => {
+        impl_pin!($inst, $pin, SclPin, 0);
+    };
+);
+
 macro_rules! impl_dma {
     ($inst:ident, {dmamux: $dmamux:ident}, $signal:ident, $request:expr) => {
         impl<T> sealed::$signal<peripherals::$inst> for T
diff --git a/embassy-stm32/src/i2c/v1.rs b/embassy-stm32/src/i2c/v1.rs
index c5d5dee0c..6fa269fc2 100644
--- a/embassy-stm32/src/i2c/v1.rs
+++ b/embassy-stm32/src/i2c/v1.rs
@@ -9,7 +9,7 @@ use embedded_hal::blocking::i2c::WriteRead;
 
 use crate::pac::i2c;
 
-use crate::gpio::sealed::OutputType::OpenDrain;
+use crate::gpio::sealed::AFType::OutputOpenDrain;
 
 pub struct I2c<'d, T: Instance> {
     phantom: PhantomData<&'d mut T>,
@@ -30,8 +30,8 @@ impl<'d, T: Instance> I2c<'d, T> {
         T::enable();
 
         unsafe {
-            scl.set_as_af(scl.af_num(), OpenDrain);
-            sda.set_as_af(sda.af_num(), OpenDrain);
+            scl.set_as_af(scl.af_num(), OutputOpenDrain);
+            sda.set_as_af(sda.af_num(), OutputOpenDrain);
         }
 
         unsafe {
diff --git a/embassy-stm32/src/spi/mod.rs b/embassy-stm32/src/spi/mod.rs
index 6249de84e..e881a5235 100644
--- a/embassy-stm32/src/spi/mod.rs
+++ b/embassy-stm32/src/spi/mod.rs
@@ -1,13 +1,14 @@
 #![macro_use]
 
 #[cfg_attr(spi_v1, path = "v1.rs")]
+#[cfg_attr(spi_f1, path = "v1.rs")]
 #[cfg_attr(spi_v2, path = "v2.rs")]
 #[cfg_attr(spi_v3, path = "v3.rs")]
 mod _version;
 use crate::{dma, peripherals, rcc::RccPeripheral};
 pub use _version::*;
 
-use crate::gpio::Pin;
+use crate::gpio::OptionalPin;
 
 #[derive(Debug)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
@@ -52,15 +53,15 @@ pub(crate) mod sealed {
         fn regs() -> &'static crate::pac::spi::Spi;
     }
 
-    pub trait SckPin<T: Instance>: Pin {
+    pub trait SckPin<T: Instance>: OptionalPin {
         fn af_num(&self) -> u8;
     }
 
-    pub trait MosiPin<T: Instance>: Pin {
+    pub trait MosiPin<T: Instance>: OptionalPin {
         fn af_num(&self) -> u8;
     }
 
-    pub trait MisoPin<T: Instance>: Pin {
+    pub trait MisoPin<T: Instance>: OptionalPin {
         fn af_num(&self) -> u8;
     }
 
@@ -104,6 +105,7 @@ macro_rules! impl_pin {
     };
 }
 
+#[cfg(not(rcc_f1))]
 crate::pac::peripheral_pins!(
     ($inst:ident, spi, SPI, $pin:ident, SCK, $af:expr) => {
         impl_pin!($inst, $pin, SckPin, $af);
@@ -118,6 +120,21 @@ crate::pac::peripheral_pins!(
     };
 );
 
+#[cfg(rcc_f1)]
+crate::pac::peripheral_pins!(
+    ($inst:ident, spi, SPI, $pin:ident, SCK) => {
+        impl_pin!($inst, $pin, SckPin, 0);
+    };
+
+    ($inst:ident, spi, SPI, $pin:ident, MOSI) => {
+        impl_pin!($inst, $pin, MosiPin, 0);
+    };
+
+    ($inst:ident, spi, SPI, $pin:ident, MISO) => {
+        impl_pin!($inst, $pin, MisoPin, 0);
+    };
+);
+
 macro_rules! impl_dma {
     ($inst:ident, {dmamux: $dmamux:ident}, $signal:ident, $request:expr) => {
         impl<T> sealed::$signal<peripherals::$inst> for T
diff --git a/embassy-stm32/src/spi/v1.rs b/embassy-stm32/src/spi/v1.rs
index 53d8252e6..b727f2008 100644
--- a/embassy-stm32/src/spi/v1.rs
+++ b/embassy-stm32/src/spi/v1.rs
@@ -1,14 +1,11 @@
 #![macro_use]
 
 use crate::dma::NoDma;
-use crate::gpio::{
-    sealed::{
-        OutputType::{OpenDrain, PushPull},
-        Pin,
-    },
-    AnyPin,
-};
+use crate::gpio::sealed::AFType;
+use crate::gpio::sealed::Pin;
+use crate::gpio::{AnyPin, NoPin};
 use crate::pac::spi;
+use crate::peripherals;
 use crate::spi::{
     ByteOrder, Config, Error, Instance, MisoPin, MosiPin, RxDmaChannel, SckPin, TxDmaChannel,
     WordSize,
@@ -20,6 +17,7 @@ use core::ptr;
 use embassy::util::Unborrow;
 use embassy_hal_common::unborrow;
 use embassy_traits::spi as traits;
+pub use embedded_hal::blocking;
 pub use embedded_hal::spi::{Mode, Phase, Polarity, MODE_0, MODE_1, MODE_2, MODE_3};
 use futures::future::join3;
 
@@ -32,10 +30,29 @@ impl WordSize {
     }
 }
 
+macro_rules! impl_nopin {
+    ($inst:ident, $signal:ident) => {
+        impl $signal<peripherals::$inst> for NoPin {}
+
+        impl super::sealed::$signal<peripherals::$inst> for NoPin {
+            fn af_num(&self) -> u8 {
+                0
+            }
+        }
+    };
+}
+crate::pac::peripherals!(
+    (spi, $inst:ident) => {
+        impl_nopin!($inst, SckPin);
+        impl_nopin!($inst, MosiPin);
+        impl_nopin!($inst, MisoPin);
+    };
+);
+
 pub struct Spi<'d, T: Instance, Tx, Rx> {
-    sck: AnyPin,
-    mosi: AnyPin,
-    miso: AnyPin,
+    sck: Option<AnyPin>,
+    mosi: Option<AnyPin>,
+    miso: Option<AnyPin>,
     txdma: Tx,
     rxdma: Rx,
     current_word_size: WordSize,
@@ -58,16 +75,21 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
     {
         unborrow!(sck, mosi, miso, txdma, rxdma);
 
+        let sck_af = sck.af_num();
+        let mosi_af = mosi.af_num();
+        let miso_af = miso.af_num();
+        let sck = sck.degrade_optional();
+        let mosi = mosi.degrade_optional();
+        let miso = miso.degrade_optional();
+
         unsafe {
-            sck.set_as_af(sck.af_num(), PushPull);
-            mosi.set_as_af(mosi.af_num(), PushPull);
-            miso.set_as_af(miso.af_num(), OpenDrain);
+            sck.as_ref()
+                .map(|x| x.set_as_af(sck_af, AFType::OutputPushPull));
+            mosi.as_ref()
+                .map(|x| x.set_as_af(mosi_af, AFType::OutputPushPull));
+            miso.as_ref().map(|x| x.set_as_af(miso_af, AFType::Input));
         }
 
-        let sck = sck.degrade();
-        let mosi = mosi.degrade();
-        let miso = miso.degrade();
-
         unsafe {
             T::regs().cr2().modify(|w| {
                 w.set_ssoe(false);
@@ -103,6 +125,9 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
                 w.set_ssm(true);
                 w.set_crcen(false);
                 w.set_bidimode(spi::vals::Bidimode::UNIDIRECTIONAL);
+                if mosi.is_none() {
+                    w.set_rxonly(spi::vals::Rxonly::OUTPUTDISABLED);
+                }
                 w.set_dff(WordSize::EightBit.dff())
             });
         }
@@ -294,9 +319,9 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
 impl<'d, T: Instance, Tx, Rx> Drop for Spi<'d, T, Tx, Rx> {
     fn drop(&mut self) {
         unsafe {
-            self.sck.set_as_analog();
-            self.mosi.set_as_analog();
-            self.miso.set_as_analog();
+            self.sck.as_ref().map(|x| x.set_as_analog());
+            self.mosi.as_ref().map(|x| x.set_as_analog());
+            self.miso.as_ref().map(|x| x.set_as_analog());
         }
     }
 }
@@ -414,13 +439,18 @@ fn write_word<W: Word>(regs: &'static crate::pac::spi::Spi, word: W) -> Result<(
         let sr = unsafe { regs.sr().read() };
         if sr.ovr() {
             return Err(Error::Overrun);
-        } else if sr.fre() {
+        }
+        #[cfg(not(spi_f1))]
+        if sr.fre() {
             return Err(Error::Framing);
-        } else if sr.modf() {
+        }
+        if sr.modf() {
             return Err(Error::ModeFault);
-        } else if sr.crcerr() {
+        }
+        if sr.crcerr() {
             return Err(Error::Crc);
-        } else if sr.txe() {
+        }
+        if sr.txe() {
             unsafe {
                 let dr = regs.dr().ptr() as *mut W;
                 ptr::write_volatile(dr, word);
@@ -436,13 +466,18 @@ fn read_word<W: Word>(regs: &'static crate::pac::spi::Spi) -> Result<W, Error> {
         let sr = unsafe { regs.sr().read() };
         if sr.ovr() {
             return Err(Error::Overrun);
-        } else if sr.modf() {
-            return Err(Error::ModeFault);
-        } else if sr.fre() {
+        }
+        #[cfg(not(spi_f1))]
+        if sr.fre() {
             return Err(Error::Framing);
-        } else if sr.crcerr() {
+        }
+        if sr.modf() {
+            return Err(Error::ModeFault);
+        }
+        if sr.crcerr() {
             return Err(Error::Crc);
-        } else if sr.rxne() {
+        }
+        if sr.rxne() {
             unsafe {
                 let dr = regs.dr().ptr() as *const W;
                 return Ok(ptr::read_volatile(dr));
diff --git a/embassy-stm32/src/spi/v2.rs b/embassy-stm32/src/spi/v2.rs
index 9df71ef25..cb871a9a0 100644
--- a/embassy-stm32/src/spi/v2.rs
+++ b/embassy-stm32/src/spi/v2.rs
@@ -36,9 +36,9 @@ impl WordSize {
 }
 
 pub struct Spi<'d, T: Instance, Tx, Rx> {
-    sck: AnyPin,
-    mosi: AnyPin,
-    miso: AnyPin,
+    sck: Option<AnyPin>,
+    mosi: Option<AnyPin>,
+    miso: Option<AnyPin>,
     txdma: Tx,
     rxdma: Rx,
     phantom: PhantomData<&'d mut T>,
@@ -60,16 +60,22 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
     {
         unborrow!(sck, mosi, miso, txdma, rxdma);
 
+        let sck_af = sck.af_num();
+        let mosi_af = mosi.af_num();
+        let miso_af = miso.af_num();
+        let sck = sck.degrade_optional();
+        let mosi = mosi.degrade_optional();
+        let miso = miso.degrade_optional();
+
         unsafe {
-            Self::configure_pin(sck.block(), sck.pin() as _, sck.af_num());
-            Self::configure_pin(mosi.block(), mosi.pin() as _, mosi.af_num());
-            Self::configure_pin(miso.block(), miso.pin() as _, miso.af_num());
+            sck.as_ref()
+                .map(|x| Self::configure_pin(x.block(), x.pin() as _, sck_af));
+            sck.as_ref()
+                .map(|x| Self::configure_pin(x.block(), x.pin() as _, mosi_af));
+            sck.as_ref()
+                .map(|x| Self::configure_pin(x.block(), x.pin() as _, miso_af));
         }
 
-        let sck = sck.degrade();
-        let mosi = mosi.degrade();
-        let miso = miso.degrade();
-
         let pclk = T::frequency();
         let freq = freq.into();
         let br = Self::compute_baud_rate(pclk, freq);
@@ -307,9 +313,15 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
 impl<'d, T: Instance, Tx, Rx> Drop for Spi<'d, T, Tx, Rx> {
     fn drop(&mut self) {
         unsafe {
-            Self::unconfigure_pin(self.sck.block(), self.sck.pin() as _);
-            Self::unconfigure_pin(self.mosi.block(), self.mosi.pin() as _);
-            Self::unconfigure_pin(self.miso.block(), self.miso.pin() as _);
+            self.sck
+                .as_ref()
+                .map(|x| Self::unconfigure_pin(x.block(), x.pin() as _));
+            self.mosi
+                .as_ref()
+                .map(|x| Self::unconfigure_pin(x.block(), x.pin() as _));
+            self.miso
+                .as_ref()
+                .map(|x| Self::unconfigure_pin(x.block(), x.pin() as _));
         }
     }
 }
diff --git a/embassy-stm32/src/spi/v3.rs b/embassy-stm32/src/spi/v3.rs
index b0e57254e..ef0f123f1 100644
--- a/embassy-stm32/src/spi/v3.rs
+++ b/embassy-stm32/src/spi/v3.rs
@@ -38,9 +38,9 @@ impl WordSize {
 
 #[allow(unused)]
 pub struct Spi<'d, T: Instance, Tx = NoDma, Rx = NoDma> {
-    sck: AnyPin,
-    mosi: AnyPin,
-    miso: AnyPin,
+    sck: Option<AnyPin>,
+    mosi: Option<AnyPin>,
+    miso: Option<AnyPin>,
     txdma: Tx,
     rxdma: Rx,
     phantom: PhantomData<&'d mut T>,
@@ -62,18 +62,24 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
     {
         unborrow!(sck, mosi, miso, txdma, rxdma);
 
+        let sck_af = sck.af_num();
+        let mosi_af = mosi.af_num();
+        let miso_af = miso.af_num();
+        let sck = sck.degrade_optional();
+        let mosi = mosi.degrade_optional();
+        let miso = miso.degrade_optional();
+
         unsafe {
-            Self::configure_pin(sck.block(), sck.pin() as _, sck.af_num());
-            //sck.block().otyper().modify(|w| w.set_ot(sck.pin() as _, crate::pac::gpio::vals::Ot::PUSHPULL));
-            Self::configure_pin(mosi.block(), mosi.pin() as _, mosi.af_num());
-            //mosi.block().otyper().modify(|w| w.set_ot(mosi.pin() as _, crate::pac::gpio::vals::Ot::PUSHPULL));
-            Self::configure_pin(miso.block(), miso.pin() as _, miso.af_num());
+            sck.as_ref()
+                .map(|x| Self::configure_pin(x.block(), x.pin() as _, sck_af));
+            //sck.block().otyper().modify(|w| w.set_ot(Pin::pin(sck) as _, crate::pac::gpio::vals::Ot::PUSHPULL));
+            sck.as_ref()
+                .map(|x| Self::configure_pin(x.block(), x.pin() as _, mosi_af));
+            //mosi.block().otyper().modify(|w| w.set_ot(Pin::pin(mosi) as _, crate::pac::gpio::vals::Ot::PUSHPULL));
+            sck.as_ref()
+                .map(|x| Self::configure_pin(x.block(), x.pin() as _, miso_af));
         }
 
-        let sck = sck.degrade();
-        let mosi = mosi.degrade();
-        let miso = miso.degrade();
-
         let pclk = T::frequency();
         let br = Self::compute_baud_rate(pclk, freq.into());
         unsafe {
@@ -340,9 +346,15 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
 impl<'d, T: Instance, Tx, Rx> Drop for Spi<'d, T, Tx, Rx> {
     fn drop(&mut self) {
         unsafe {
-            Self::unconfigure_pin(self.sck.block(), self.sck.pin() as _);
-            Self::unconfigure_pin(self.mosi.block(), self.mosi.pin() as _);
-            Self::unconfigure_pin(self.miso.block(), self.miso.pin() as _);
+            self.sck
+                .as_ref()
+                .map(|x| Self::unconfigure_pin(x.block(), x.pin() as _));
+            self.mosi
+                .as_ref()
+                .map(|x| Self::unconfigure_pin(x.block(), x.pin() as _));
+            self.miso
+                .as_ref()
+                .map(|x| Self::unconfigure_pin(x.block(), x.pin() as _));
         }
     }
 }
diff --git a/embassy-stm32/src/usart/mod.rs b/embassy-stm32/src/usart/mod.rs
index e64f8d1d9..a6955729d 100644
--- a/embassy-stm32/src/usart/mod.rs
+++ b/embassy-stm32/src/usart/mod.rs
@@ -127,7 +127,6 @@ crate::pac::interrupts!(
     };
 );
 
-#[cfg(not(rcc_f1))]
 macro_rules! impl_pin {
     ($inst:ident, $pin:ident, $signal:ident, $af:expr) => {
         impl sealed::$signal<peripherals::$inst> for peripherals::$pin {
@@ -140,6 +139,7 @@ macro_rules! impl_pin {
     };
 }
 
+#[cfg(not(rcc_f1))]
 crate::pac::peripheral_pins!(
 
     // USART
@@ -177,6 +177,44 @@ crate::pac::peripheral_pins!(
     };
 );
 
+#[cfg(rcc_f1)]
+crate::pac::peripheral_pins!(
+
+    // USART
+    ($inst:ident, usart, USART, $pin:ident, TX) => {
+        impl_pin!($inst, $pin, TxPin, 0);
+    };
+    ($inst:ident, usart, USART, $pin:ident, RX) => {
+        impl_pin!($inst, $pin, RxPin, 0);
+    };
+    ($inst:ident, usart, USART, $pin:ident, CTS) => {
+        impl_pin!($inst, $pin, CtsPin, 0);
+    };
+    ($inst:ident, usart, USART, $pin:ident, RTS) => {
+        impl_pin!($inst, $pin, RtsPin, 0);
+    };
+    ($inst:ident, usart, USART, $pin:ident, CK) => {
+        impl_pin!($inst, $pin, CkPin, 0);
+    };
+
+    // UART
+    ($inst:ident, uart, UART, $pin:ident, TX) => {
+        impl_pin!($inst, $pin, TxPin, 0);
+    };
+    ($inst:ident, uart, UART, $pin:ident, RX) => {
+        impl_pin!($inst, $pin, RxPin, 0);
+    };
+    ($inst:ident, uart, UART, $pin:ident, CTS) => {
+        impl_pin!($inst, $pin, CtsPin, 0);
+    };
+    ($inst:ident, uart, UART, $pin:ident, RTS) => {
+        impl_pin!($inst, $pin, RtsPin, 0);
+    };
+    ($inst:ident, uart, UART, $pin:ident, CK) => {
+        impl_pin!($inst, $pin, CkPin, 0);
+    };
+);
+
 macro_rules! impl_dma {
     ($inst:ident, {dmamux: $dmamux:ident}, $signal:ident, $request:expr) => {
         impl<T> sealed::$signal<peripherals::$inst> for T
diff --git a/embassy-stm32/src/usart/v1.rs b/embassy-stm32/src/usart/v1.rs
index d1dd68305..8cd392d18 100644
--- a/embassy-stm32/src/usart/v1.rs
+++ b/embassy-stm32/src/usart/v1.rs
@@ -1,4 +1,4 @@
-use crate::gpio::sealed::OutputType::{OpenDrain, PushPull};
+use crate::gpio::sealed::AFType::{OutputOpenDrain, OutputPushPull};
 use core::future::Future;
 use core::marker::PhantomData;
 use embassy::util::Unborrow;
@@ -37,8 +37,8 @@ impl<'d, T: Instance, TxDma, RxDma> Uart<'d, T, TxDma, RxDma> {
         let r = inner.regs();
 
         unsafe {
-            rx.set_as_af(rx.af_num(), OpenDrain);
-            tx.set_as_af(tx.af_num(), PushPull);
+            rx.set_as_af(rx.af_num(), OutputOpenDrain);
+            tx.set_as_af(tx.af_num(), OutputPushPull);
 
             r.brr().write_value(regs::Brr(div));
             r.cr1().write(|w| {
diff --git a/embassy-stm32/src/usart/v2.rs b/embassy-stm32/src/usart/v2.rs
index 5e6696351..e6e5f69db 100644
--- a/embassy-stm32/src/usart/v2.rs
+++ b/embassy-stm32/src/usart/v2.rs
@@ -13,7 +13,7 @@ use futures::TryFutureExt;
 
 use super::*;
 use crate::dma::NoDma;
-use crate::gpio::sealed::OutputType::{OpenDrain, PushPull};
+use crate::gpio::sealed::AFType::{OutputOpenDrain, OutputPushPull};
 use crate::pac::usart::{regs, vals};
 
 pub struct Uart<'d, T: Instance, TxDma = NoDma, RxDma = NoDma> {
@@ -43,8 +43,8 @@ impl<'d, T: Instance, TxDma, RxDma> Uart<'d, T, TxDma, RxDma> {
         let r = inner.regs();
 
         unsafe {
-            rx.set_as_af(rx.af_num(), OpenDrain);
-            tx.set_as_af(tx.af_num(), PushPull);
+            rx.set_as_af(rx.af_num(), OutputOpenDrain);
+            tx.set_as_af(tx.af_num(), OutputPushPull);
 
             r.cr2().write(|_w| {});
             r.cr3().write(|_w| {});
diff --git a/stm32-data b/stm32-data
-Subproject e78ea6f05058dc1eff1dd4a4f07227d502a3b65
+Subproject bae2d34445f87e7b9a88b683c789c5d0c7560fb