Add clearing of noinit segment on bad word

Code readability cleanup

3 files changed, 12 insertions, 7 deletions

diff --git a/src/components/datetime/DateTimeController.cpp b/src/components/datetime/DateTimeController.cpp
index 77c5be4e..49953388 100644
--- a/src/components/datetime/DateTimeController.cpp
+++ b/src/components/datetime/DateTimeController.cpp
@@ -76,7 +76,7 @@ void DateTime::UpdateTime(uint32_t systickCounter) {
   } else if (hour != 0) {
     isMidnightAlreadyNotified = false;
   }
-  BackUpTime = currentDateTime;
+  NoInit_BackUpTime = currentDateTime;
 }
 
 const char* DateTime::MonthShortToString() {
diff --git a/src/components/datetime/DateTimeController.h b/src/components/datetime/DateTimeController.h
index ed7b0861..a20f71c1 100644
--- a/src/components/datetime/DateTimeController.h
+++ b/src/components/datetime/DateTimeController.h
@@ -2,7 +2,7 @@
 
 #include <cstdint>
 #include <chrono>
-extern std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> BackUpTime;
+extern std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> NoInit_BackUpTime;
 
 namespace Pinetime {
   namespace System {
diff --git a/src/main.cpp b/src/main.cpp
index 9c384a8b..d5da4283 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -160,8 +160,12 @@ Pinetime::System::SystemTask systemTask(spi,
                                         heartRateApp,
                                         fs);
 
-uint32_t MAGIC_RAM __attribute__((section(".noinit")));
-std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> BackUpTime __attribute__((section(".noinit")));
+extern uint32_t __start_noinit_data;
+extern uint32_t __stop_noinit_data;
+static constexpr uint32_t NoInit_MagicValue = 0xDEADBEEF;
+uint32_t NoInit_MagicWord __attribute__((section(".noinit")));
+std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> NoInit_BackUpTime __attribute__((section(".noinit")));
+
 
 void nrfx_gpiote_evt_handler(nrfx_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {
   if (pin == pinTouchIrq) {
@@ -324,10 +328,11 @@ int main(void) {
   Pinetime::BootloaderVersion::SetVersion(NRF_TIMER2->CC[0]);
 
   // Check Magic Ram and reset lost variables
-  if (MAGIC_RAM == 0xDEADBEEF) {
-    dateTimeController.SetCurrentTime(BackUpTime);
+  if (NoInit_MagicWord == NoInit_MagicValue) {
+    dateTimeController.SetCurrentTime(NoInit_BackUpTime);
   } else {
-    MAGIC_RAM = 0xDEADBEEF;
+    memset(&__start_noinit_data,0,(uintptr_t)&__stop_noinit_data-(uintptr_t)&__start_noinit_data);
+    NoInit_MagicWord = NoInit_MagicValue;
   }
 
   lvgl.Init();