Fix spi transfer struct naming

Signed-off-by: Moritz Scheuren <moritz.scheuren@systec-electronic.com>

Author: systec-ms

src/spi.rs

@@ -103,7 +103,7 @@ where
         dma_tx: &dma::Handle<<Tx<I> as dma::Target>::Instance, state::Enabled>,
         rx: <Rx<I> as dma::Target>::Stream,
         tx: <Tx<I> as dma::Target>::Stream,
-    ) -> transfer<Word, I, P, B, Rx<I>, Tx<I>, dma::Ready>
+    ) -> Transfer<Word, I, P, B, Rx<I>, Tx<I>, dma::Ready>
     where
         Rx<I>: dma::Target,
         Tx<I>: dma::Target,
@@ -163,7 +163,7 @@ where
             )
         };
 
-        transfer {
+        Transfer {
             buffer,
             target: self,
 
@@ -629,7 +629,7 @@ pub struct Tx<I>(PhantomData<I>);
 /// Since DMA can send and receive at the same time, using two DMA transfers and
 /// two DMA streams, we need this type to represent this operation and wrap the
 /// underlying [`dma::Transfer`] instances.
-pub struct transfer<Word: SupportedWordSize, I, P, Buffer, Rx: dma::Target, Tx: dma::Target, State>
+pub struct Transfer<Word: SupportedWordSize, I, P, Buffer, Rx: dma::Target, Tx: dma::Target, State>
 {
     buffer: Pin<Buffer>,
     target: Spi<I, P, Enabled<Word>>,
@@ -638,7 +638,7 @@ pub struct transfer<Word: SupportedWordSize, I, P, Buffer, Rx: dma::Target, Tx:
     _state: State,
 }
 
-impl<Word, I, P, Buffer, Rx, Tx> transfer<Word, I, P, Buffer, Rx, Tx, dma::Ready>
+impl<Word, I, P, Buffer, Rx, Tx> Transfer<Word, I, P, Buffer, Rx, Tx, dma::Ready>
 where
     Rx: dma::Target,
     Tx: dma::Target,
@@ -667,8 +667,8 @@ where
         self,
         rx_handle: &dma::Handle<Rx::Instance, state::Enabled>,
         tx_handle: &dma::Handle<Tx::Instance, state::Enabled>,
-    ) -> transfer<Word, I, P, Buffer, Rx, Tx, dma::Started> {
-        transfer {
+    ) -> Transfer<Word, I, P, Buffer, Rx, Tx, dma::Started> {
+        Transfer {
             buffer: self.buffer,
             target: self.target,
             rx: self.rx.start(rx_handle),
@@ -678,7 +678,7 @@ where
     }
 }
 
-impl<Word, I, P, Buffer, Rx, Tx> transfer<Word, I, P, Buffer, Rx, Tx, dma::Started>
+impl<Word, I, P, Buffer, Rx, Tx> Transfer<Word, I, P, Buffer, Rx, Tx, dma::Started>
 where
     Rx: dma::Target,
     Tx: dma::Target,