wip usart

embassy-stm32/src/chip/f429.rs

@@ -1,5 +1,6 @@
 use embassy_extras::peripherals;
 
+#[rustfmt::skip]
 peripherals!(
     // GPIO Port A
     PA0, PA1, PA2, PA3, PA4, PA5, PA6, PA7, PA8, PA9, PA10, PA11, PA12, PA13, PA14, PA15,
@@ -10,6 +11,12 @@ peripherals!(
     // todo more ports
 
     // EXTI
-    EXTI0, EXTI1, EXTI2, EXTI3, EXTI4, EXTI5, EXTI6, EXTI7, EXTI8, EXTI9, EXTI10, EXTI11, EXTI12,
-    EXTI13, EXTI14, EXTI15,
+    EXTI0, EXTI1, EXTI2, EXTI3, EXTI4, EXTI5, EXTI6, EXTI7, EXTI8, EXTI9, EXTI10, EXTI11, EXTI12, EXTI13, EXTI14, EXTI15,
+
+    // USART
+    USART1,
+    USART2,
+    USART3,
+    USART6,
+
 );

embassy-stm32/src/lib.rs

@@ -32,5 +32,6 @@ pub mod exti;
 pub mod gpio;
 //pub mod rtc;
 //pub mod interrupt;
+pub mod usart;
 
 pub(crate) use stm32_metapac as pac;

embassy-stm32/src/usart.rs

@@ -0,0 +1,64 @@
+use embassy::util::PeripheralBorrow;
+
+use crate::pac::usart_v1::{regs, vals, Usart};
+use crate::peripherals;
+
+mod sealed {
+    use super::*;
+    pub trait Instance {
+        fn regs(&self) -> Usart;
+    }
+}
+
+#[non_exhaustive]
+pub struct Config {
+    pub baudrate: u32,
+    pub data_bits: u8,
+    pub stop_bits: u8,
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            baudrate: 115200,
+            data_bits: 8,
+            stop_bits: 1,
+        }
+    }
+}
+
+pub struct Uart<'d, T: Instance> {
+    inner: T,
+    phantom: PhantomData<&'d mut T>,
+}
+
+impl<'d, T: Instance> Uart<'d, T> {
+    pub fn new(
+        inner: impl PeripheralBorrow<Target = T>,
+        tx: impl PeripheralBorrow<Target = impl TxPin<T>>,
+        rx: impl PeripheralBorrow<Target = impl RxPin<T>>,
+        cts: impl PeripheralBorrow<Target = impl CtsPin<T>>,
+        rts: impl PeripheralBorrow<Target = impl RtsPin<T>>,
+        config: Config,
+    ) -> Self {
+        unborrow!(inner, tx, rx, cts, rts);
+    }
+}
+
+pub trait Instance: sealed::Instance {}
+
+macro_rules! impl_instance {
+    ($type:ident, $addr:expr) => {
+        impl sealed::Instance for peripherals::$type {
+            fn regs(&self) -> Usart {
+                Usart($addr as _)
+            }
+        }
+        impl Instance for peripherals::$type {}
+    };
+}
+
+impl_instance!(USART1, 0x40011000);
+impl_instance!(USART2, 0x40004400);
+impl_instance!(USART3, 0x40004800);
+impl_instance!(USART6, 0x40011400);