[UCPD] Instance and Pin Traits

Skip FRSTX pin for now. Its available twice in the device JSON as
FRSTX1 and FRSTX2 both with the same pins as targets.
I don’t know enough about the FRS (fast role switch) feature to
understand if that is correct and how to handle the pins.

embassy-stm32/build.rs

@@ -764,6 +764,8 @@ fn main() {
     #[rustfmt::skip]
     let signals: HashMap<_, _> = [
                 // (kind, signal) => trait
+        (("ucpd", "CC1"), quote!(crate::ucpd::Cc1Pin)),
+        (("ucpd", "CC2"), quote!(crate::ucpd::Cc2Pin)),
         (("usart", "TX"), quote!(crate::usart::TxPin)),
         (("usart", "RX"), quote!(crate::usart::RxPin)),
         (("usart", "CTS"), quote!(crate::usart::CtsPin)),
@@ -1102,6 +1104,8 @@ fn main() {
 
     let signals: HashMap<_, _> = [
         // (kind, signal) => trait
+        (("ucpd", "RX"), quote!(crate::ucpd::RxDma)),
+        (("ucpd", "TX"), quote!(crate::ucpd::TxDma)),
         (("usart", "RX"), quote!(crate::usart::RxDma)),
         (("usart", "TX"), quote!(crate::usart::TxDma)),
         (("lpuart", "RX"), quote!(crate::usart::RxDma)),

embassy-stm32/src/lib.rs

@@ -73,6 +73,8 @@ pub mod sai;
 pub mod sdmmc;
 #[cfg(spi)]
 pub mod spi;
+#[cfg(ucpd)]
+pub mod ucpd;
 #[cfg(uid)]
 pub mod uid;
 #[cfg(usart)]

embassy-stm32/src/ucpd.rs

@@ -0,0 +1,28 @@
+//! USB Type-C/USB Power Delivery Interface (UCPD)
+
+use crate::rcc::RccPeripheral;
+
+/// UCPD instance trait.
+pub trait Instance: sealed::Instance + RccPeripheral {}
+
+pub(crate) mod sealed {
+    pub trait Instance {
+        const REGS: crate::pac::ucpd::Ucpd;
+    }
+}
+
+foreach_peripheral!(
+    (ucpd, $inst:ident) => {
+        impl sealed::Instance for crate::peripherals::$inst {
+            const REGS: crate::pac::ucpd::Ucpd = crate::pac::$inst;
+        }
+
+        impl Instance for crate::peripherals::$inst {}
+    };
+);
+
+pin_trait!(Cc1Pin, Instance);
+pin_trait!(Cc2Pin, Instance);
+
+dma_trait!(TxDma, Instance);
+dma_trait!(RxDma, Instance);