From 3f1554e071ac8c5f7b382c0b640d82a2e0191ca1 Mon Sep 17 00:00:00 2001
From: datdenkikniet <jcdra1@gmail.com>
Date: Sat, 4 Feb 2023 19:02:59 +0100
Subject: [PATCH] Not sure if sram sections get nulled out during
 initialization

---
 src/dma/rx/h_desc.rs | 5 +++++
 src/dma/tx/h_desc.rs | 9 +++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/dma/rx/h_desc.rs b/src/dma/rx/h_desc.rs
index 80e9a1a8..6fe4bcdb 100644
--- 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
index 81da90b0..63932f5e 100644
--- 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