From bf9b6d50e0285a253e2806c3c694149751475b19 Mon Sep 17 00:00:00 2001
From: David Crocker <dcrocker@eschertech.com>
Date: Tue, 15 Dec 2020 21:54:04 +0000
Subject: Disable cache while writing data to user signature

---
 src/Hardware/NonVolatileMemory.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/Hardware/NonVolatileMemory.cpp')

diff --git a/src/Hardware/NonVolatileMemory.cpp b/src/Hardware/NonVolatileMemory.cpp
index 72b91bd5..d0534821 100644
--- a/src/Hardware/NonVolatileMemory.cpp
+++ b/src/Hardware/NonVolatileMemory.cpp
@@ -75,7 +75,12 @@ void NonVolatileMemory::EnsureWritten() noexcept
 	if (state == NvmState::writeNeeded)
 	{
 # if SAM4E || SAM4S || SAME70
+		const bool cacheEnabled = Cache::Disable();
 		flash_write_user_signature(reinterpret_cast<const uint32_t*>(&buffer));
+		if (cacheEnabled)
+		{
+			Cache::Enable();
+		}
 # elif defined(__LPC17xx__)
 		LPC_WriteSoftwareResetData(slot, buffer, sizeof(buffer));
 # else
-- 
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