From ef3b93daa11eaeeae7830436fcec0164b1d6fad6 Mon Sep 17 00:00:00 2001
From: pinchies <pinchies@gmail.com>
Date: Mon, 25 Mar 2019 12:07:31 +1100
Subject: [PATCH] Fix STM32F1 SD-based EEPROM emulation (#13475)

If `openFile` is given `true`, then it has read-only access. Because all the writing occurs on the next line, this breaks SD card as EEPROM.
---
 Marlin/src/HAL/HAL_STM32F1/persistent_store_sdcard.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Marlin/src/HAL/HAL_STM32F1/persistent_store_sdcard.cpp b/Marlin/src/HAL/HAL_STM32F1/persistent_store_sdcard.cpp
index e7a1336edd..2b184cdc4c 100644
--- a/Marlin/src/HAL/HAL_STM32F1/persistent_store_sdcard.cpp
+++ b/Marlin/src/HAL/HAL_STM32F1/persistent_store_sdcard.cpp
@@ -55,7 +55,7 @@ bool PersistentStore::access_start() {
 
 bool PersistentStore::access_finish() {
   if (!card.isDetected()) return false;
-  card.openFile(eeprom_filename, true);
+  card.openFile(eeprom_filename, false);
   int16_t bytes_written = card.write(HAL_STM32F1_eeprom_content, HAL_STM32F1_EEPROM_SIZE);
   card.closefile();
   return (bytes_written == HAL_STM32F1_EEPROM_SIZE);