From 9194e871a4590d1118f40ea8dbf1d34e45bc759c Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Wed, 15 Sep 2021 23:14:07 +0200
Subject: platforms: Improve STM32F42x support.

---
 platforms/stm32/f4.yaml | 7 +++++++
 rcc/flash.cpp           | 4 ++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/platforms/stm32/f4.yaml b/platforms/stm32/f4.yaml
index 5325d92..d2d8a28 100644
--- a/platforms/stm32/f4.yaml
+++ b/platforms/stm32/f4.yaml
@@ -12,6 +12,13 @@
       origin: 0x08000000
       size: 1M
 
+- match:
+    mem: i
+  mem:
+    flash:
+      origin: 0x08000000
+      size: 2M
+
 - mem:
     ram:
       origin: 0x20000000
diff --git a/rcc/flash.cpp b/rcc/flash.cpp
index c20b618..0f46cf0 100644
--- a/rcc/flash.cpp
+++ b/rcc/flash.cpp
@@ -9,9 +9,9 @@ void flash_init() {
 	#elif defined(STM32F4)
 	
 	// Set flash latency.
-	FLASH.ACR = 0x105;
+	FLASH.ACR = 0x107;
 	
-	while(FLASH.ACR != 0x105);
+	while(FLASH.ACR != 0x107);
 	
 	#elif defined(STM32F0) || defined(STM32L0)
 	
-- 
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