introduce OptionalPeripherals

embassy-hal-internal/src/macros.rs

@@ -46,6 +46,16 @@ macro_rules! peripherals_struct {
             )*
         }
 
+        /// Struct containing all the peripheral singletons wrapped in `Option`.
+        #[allow(non_snake_case)]
+        pub struct OptionalPeripherals {
+            $(
+                #[doc = concat!(stringify!($name), " peripheral")]
+                $(#[$cfg])?
+                pub $name: Option<peripherals::$name>,
+            )*
+        }
+
         impl Peripherals {
             ///Returns all the peripherals *once*
             #[inline]
@@ -86,6 +96,19 @@ macro_rules! peripherals_struct {
                 }
             }
         }
+
+        impl OptionalPeripherals {
+            /// Create an `OptionalPeripherals`, consuming a `Peripherals`
+            #[inline]
+            pub fn from(p: Peripherals) -> Self {
+                Self {
+                    $(
+                        $(#[$cfg])?
+                        $name: Some(p.$name),
+                    )*
+                }
+            }
+        }
     };
 }
 

embassy-nrf/src/lib.rs

@@ -172,7 +172,7 @@ macro_rules! bind_interrupts {
 pub use chip::pac;
 #[cfg(not(feature = "unstable-pac"))]
 pub(crate) use chip::pac;
-pub use chip::{peripherals, Peripherals, EASY_DMA_SIZE};
+pub use chip::{peripherals, OptionalPeripherals, Peripherals, EASY_DMA_SIZE};
 pub use embassy_hal_internal::{into_ref, Peripheral, PeripheralRef};
 
 pub use crate::chip::interrupt;

embassy-stm32/src/lib.rs

@@ -153,7 +153,7 @@ macro_rules! bind_interrupts {
 }
 
 // Reexports
-pub use _generated::{peripherals, Peripherals};
+pub use _generated::{peripherals, OptionalPeripherals, Peripherals};
 pub use embassy_hal_internal::{into_ref, Peripheral, PeripheralRef};
 #[cfg(feature = "unstable-pac")]
 pub use stm32_metapac as pac;