Wire up peripheral DMA channels for SPI.

1 files changed, 36 insertions, 0 deletions

diff --git a/embassy-stm32/src/spi/mod.rs b/embassy-stm32/src/spi/mod.rs
index 7e1686443..9bb5a729c 100644
--- a/embassy-stm32/src/spi/mod.rs
+++ b/embassy-stm32/src/spi/mod.rs
@@ -116,3 +116,39 @@ crate::pac::peripheral_pins!(
         impl_pin!($inst, $pin, MisoPin, $af);
     };
 );
+
+macro_rules! impl_dma {
+    ($inst:ident, {dmamux: $dmamux:ident}, $signal:ident, $request:expr) => {
+        impl<T> sealed::$signal<peripherals::$inst> for T
+        where
+            T: crate::dma::MuxChannel<Mux = crate::dma::$dmamux>,
+        {
+            fn request(&self) -> dma::Request {
+                $request
+            }
+        }
+
+        impl<T> $signal<peripherals::$inst> for T where
+            T: crate::dma::MuxChannel<Mux = crate::dma::$dmamux>
+        {
+        }
+    };
+    ($inst:ident, {channel: $channel:ident}, $signal:ident, $request:expr) => {
+        impl sealed::$signal<peripherals::$inst> for peripherals::$channel {
+            fn request(&self) -> dma::Request {
+                $request
+            }
+        }
+
+        impl $signal<peripherals::$inst> for peripherals::$channel {}
+    };
+}
+
+crate::pac::peripheral_dma_channels! {
+    ($peri:ident, spi, $kind:ident, RX, $channel:tt, $request:expr) => {
+        impl_dma!($peri, $channel, RxDmaChannel, $request);
+    };
+    ($peri:ident, spi, $kind:ident, TX, $channel:tt, $request:expr) => {
+        impl_dma!($peri, $channel, TxDmaChannel, $request);
+    };
+}