DMA: Add some useful methods for checking for trasfer errors

src/dma/stream.rs

@@ -250,6 +250,13 @@ macro_rules! dma_stream {
                     dma.isr.read().$tcisr().bit_is_set()
                 }
 
+                #[inline(always)]
+                fn get_transfer_error_flag() -> bool {
+                    //NOTE(unsafe) Atomic read with no side effects
+                    let dma = unsafe { &*I::ptr() };
+                    dma.isr.read().$teisr().bit_is_set()
+                }
+
                 #[inline(always)]
                 unsafe fn enable(&mut self) {
                     //NOTE(unsafe) We only access the registers that belongs to the StreamX

src/dma/traits.rs

@@ -47,6 +47,9 @@ pub trait Stream: Sealed {
     /// Get transfer complete flag.
     fn get_transfer_complete_flag() -> bool;
 
+    /// Get transfer error flag.
+    fn get_transfer_error_flag() -> bool;
+
     /// Enable the DMA stream.
     ///
     /// # Safety

src/dma/transfer.rs

@@ -265,6 +265,11 @@ where
         STREAM::get_transfer_complete_flag()
     }
 
+    #[inline(always)]
+    pub fn get_transfer_error_flag(&self) -> bool {
+        STREAM::get_transfer_error_flag()
+    }
+
     /// Clear half transfer interrupt (htif) for the DMA stream.
     #[inline(always)]
     pub fn clear_half_transfer_interrupt(&mut self) {
@@ -437,6 +442,11 @@ where
         self.transfer.get_transfer_complete_flag()
     }
 
+    #[inline(always)]
+    pub fn get_transfer_error_flag(&self) -> bool {
+        self.transfer.get_transfer_error_flag()
+    }
+
     /// Clear half transfer interrupt (htif) for the DMA stream.
     #[inline(always)]
     pub fn clear_half_transfer_interrupt(&mut self) {