From da6b1e8399cf977698e4a630f0862f698cba2b83 Mon Sep 17 00:00:00 2001
From: Lucas Granberg <lukkeg@gmail.com>
Date: Wed, 8 Feb 2023 17:52:49 +0200
Subject: [PATCH] Reset rng in case of clock or seed error

---
 embassy-stm32/src/rng.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/embassy-stm32/src/rng.rs b/embassy-stm32/src/rng.rs
index 10fc4a75..c487b759 100644
--- a/embassy-stm32/src/rng.rs
+++ b/embassy-stm32/src/rng.rs
@@ -90,8 +90,10 @@ impl<'d, T: Instance> Rng<'d, T> {
 impl<'d, T: Instance> RngCore for Rng<'d, T> {
     fn next_u32(&mut self) -> u32 {
         loop {
-            let bits = unsafe { T::regs().sr().read() };
-            if bits.drdy() {
+            let sr = unsafe { T::regs().sr().read() };
+            if sr.seis() | sr.ceis() {
+                self.reset();
+            } else if sr.drdy() {
                 return unsafe { T::regs().dr().read() };
             }
         }