Not sure if sram sections get nulled out during initialization

stm32-rs · Feb 4, 2023 · 3f1554e · 3f1554e
1 parent 9b7dc07
commit 3f1554e
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Showing 2 changed files with 12 additions and 2 deletions.
diff --git a/src/dma/rx/h_desc.rs b/src/dma/rx/h_desc.rs
@@ -137,6 +137,11 @@ impl RxDescriptor {
 
     pub(super) fn setup(&mut self, buffer: &[u8]) {
         self.set_owned(buffer);
+        unsafe {
+            for i in 0..4 {
+                self.inner_raw.write(i, 0);
+            }
+        }
     }
 
     /// Pass ownership to the DMA engine

diff --git a/src/dma/tx/h_desc.rs b/src/dma/tx/h_desc.rs
@@ -148,8 +148,13 @@ impl TxDescriptor {
         (self.inner_raw.read(3) & TXDESC_3_LD) == TXDESC_3_LD
     }
 
-    // Placeholder for API parity with f-series descriptor.
-    pub(super) fn setup(&mut self, _: &[u8]) {}
+    pub(super) fn setup(&mut self, _: &[u8]) {
+        unsafe {
+            for i in 0..4 {
+                self.inner_raw.write(i, 0);
+            }
+        }
+    }
 
     pub(super) fn is_owned(&self) -> bool {
         (self.inner_raw.read(3) & TXDESC_3_OWN) == TXDESC_3_OWN