Add USARTv3 support.

embassy-stm32/src/usart/mod.rs

@@ -1,7 +1,8 @@
 #![macro_use]
 
-#[cfg_attr(usart_v1, path = "v1.rs")]
-#[cfg_attr(usart_v2, path = "v2.rs")]
+//#[cfg_attr(usart_v1, path = "v1.rs")]
+//#[cfg_attr(usart_v2, path = "v2.rs")]
+#[cfg_attr(usart_v3, path = "v3.rs")]
 mod _version;
 use crate::peripherals;
 pub use _version::*;
@@ -10,6 +11,51 @@ use crate::gpio::Pin;
 use crate::pac::usart::Usart;
 use crate::rcc::RccPeripheral;
 
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub enum DataBits {
+    DataBits8,
+    DataBits9,
+}
+
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub enum Parity {
+    ParityNone,
+    ParityEven,
+    ParityOdd,
+}
+
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub enum StopBits {
+    #[doc = "1 stop bit"]
+    STOP1,
+    #[doc = "0.5 stop bits"]
+    STOP0P5,
+    #[doc = "2 stop bits"]
+    STOP2,
+    #[doc = "1.5 stop bits"]
+    STOP1P5,
+}
+
+#[non_exhaustive]
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub struct Config {
+    pub baudrate: u32,
+    pub data_bits: DataBits,
+    pub stop_bits: StopBits,
+    pub parity: Parity,
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            baudrate: 115200,
+            data_bits: DataBits::DataBits8,
+            stop_bits: StopBits::STOP1,
+            parity: Parity::ParityNone,
+        }
+    }
+}
+
 /// Serial error
 #[derive(Debug, Eq, PartialEq, Copy, Clone)]
 #[non_exhaustive]
@@ -27,7 +73,7 @@ pub enum Error {
 pub(crate) mod sealed {
     use super::*;
 
-    #[cfg(dma)]
+    #[cfg(any(dma, dmamux))]
     use crate::dma::WriteDma;
 
     pub trait Instance {
@@ -49,10 +95,10 @@ pub(crate) mod sealed {
         fn af_num(&self) -> u8;
     }
 
-    #[cfg(dma)]
+    #[cfg(any(dma, dmamux))]
     pub trait RxDma<T: Instance> {}
 
-    #[cfg(dma)]
+    #[cfg(any(dma, dmamux))]
     pub trait TxDma<T: Instance>: WriteDma<T> {}
 }
 
@@ -63,9 +109,10 @@ pub trait CtsPin<T: Instance>: sealed::CtsPin<T> {}
 pub trait RtsPin<T: Instance>: sealed::RtsPin<T> {}
 pub trait CkPin<T: Instance>: sealed::CkPin<T> {}
 
-#[cfg(dma)]
+#[cfg(any(dma, dmamux))]
 pub trait RxDma<T: Instance>: sealed::RxDma<T> {}
-#[cfg(dma)]
+
+#[cfg(any(dma, dmamux))]
 pub trait TxDma<T: Instance>: sealed::TxDma<T> {}
 
 crate::pac::peripherals!(