From 0ed1b94c0b5bcfcadfcf31b71c691f776affd628 Mon Sep 17 00:00:00 2001
From: 3djc <lesitewebdejc@hotmail.com>
Date: Thu, 5 Dec 2024 03:50:17 +0100
Subject: [PATCH] feat: use RTC backup for EM on BW F4 1Mb flash radio (#5686)

---
 radio/src/main.cpp                       | 6 ++++++
 radio/src/targets/taranis/CMakeLists.txt | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/radio/src/main.cpp b/radio/src/main.cpp
index e84762c42..991260c86 100644
--- a/radio/src/main.cpp
+++ b/radio/src/main.cpp
@@ -547,7 +547,13 @@ void perMain()
 
 #if defined(RTC_BACKUP_RAM)
   if (UNEXPECTED_SHUTDOWN()) {
+#if defined(COLORLCD)
     drawFatalErrorScreen(STR_EMERGENCY_MODE);
+#else
+    lcdClear();
+    menuMainView(0);
+    lcdRefresh();
+#endif
     return;
   }
 #endif
diff --git a/radio/src/targets/taranis/CMakeLists.txt b/radio/src/targets/taranis/CMakeLists.txt
index 6e11b3339..373e8e21a 100644
--- a/radio/src/targets/taranis/CMakeLists.txt
+++ b/radio/src/targets/taranis/CMakeLists.txt
@@ -520,11 +520,13 @@ elseif ((CPU_TYPE_FULL STREQUAL STM32F407xE) OR (CPU_TYPE_FULL STREQUAL STM32F40
   if (CPU_TYPE_FULL STREQUAL STM32F407xG)
     set(TARGET_FLASH_SIZE 1M)
     add_definitions(-DSTM32F407xG)
+    set(RTC_BACKUP_RAM YES)
   else()
     set(USBJ_EX OFF)
   endif()
 elseif (CPU_TYPE_FULL STREQUAL STM32F413xG)
   set(CPU_TYPE STM32F4)
+  set(RTC_BACKUP_RAM YES)
   add_definitions(-DSTM32F40_41xxx -DSTM32F413xx)
   set(TARGET_LINKER_DIR stm32f413)
 else()