From e7aeb9b29feaf2ca4bf3ac2cac47583cd9468e88 Mon Sep 17 00:00:00 2001
From: Grant Miller <GrantM11235@gmail.com>
Date: Mon, 16 Oct 2023 19:23:01 -0500
Subject: [PATCH] stm32f1: Keep flash prefetch enabled

---
 embassy-stm32/src/rcc/f1.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/embassy-stm32/src/rcc/f1.rs b/embassy-stm32/src/rcc/f1.rs
index b2ae56dbf..367c88324 100644
--- a/embassy-stm32/src/rcc/f1.rs
+++ b/embassy-stm32/src/rcc/f1.rs
@@ -102,7 +102,6 @@ pub(crate) unsafe fn init(config: Config) {
 
     assert!(pclk2 <= 72_000_000);
 
-    // Only needed for stm32f103?
     FLASH.acr().write(|w| {
         w.set_latency(if real_sysclk <= 24_000_000 {
             Latency::WS0
@@ -111,6 +110,8 @@ pub(crate) unsafe fn init(config: Config) {
         } else {
             Latency::WS2
         });
+        // the prefetch buffer is enabled by default, let's keep it enabled
+        w.set_prftbe(true);
     });
 
     // the USB clock is only valid if an external crystal is used, the PLL is enabled, and the