Also save to NVS from time to time

build-number.txt

@@ -1 +1 @@
-455
+457

src/animation.c

@@ -90,6 +90,14 @@ void Animation_Poll(void)
             NVS_Data->animation_step_top,
             LightSensor_RelativeBrightness);
     LED_Commit();
+
+    static unsigned int store_counter = 0;
+    store_counter++;
+    if(store_counter >= ANIMATION_NVS_STORE_INTERVAL * ANIMATION_REFRESH_RATE)
+    {
+        store_counter = 0;
+        NVS_Save(false);
+    }
 }
 
 void TIM17_IRQHandler(void)

src/animation.h

@@ -15,6 +15,10 @@
 #define ANIMATION_CYCLE_TIME_TOP \
                                 (8 * 24 * 60 * 60)
 
+// Interval for saving the current animation step to NVS (in seconds)
+#define ANIMATION_NVS_STORE_INTERVAL \
+                                (60 * 60)
+
 extern const unsigned int Animation_LEDOrder[LED_COUNT];
 
 void Animation_Init(void);

src/main.c

@@ -26,13 +26,13 @@ int main(void)
         if(LightSensor_RelativeBrightness == 0 && !powered_down)
         {
             LED_Suspend();
-            NVS_Save();
+            NVS_Save(true);
             powered_down = true;
         }
         if(powered_down && LightSensor_RelativeBrightness > 0)
         {
             powered_down = false;
-            NVS_Save();
+            NVS_Save(true);
             LED_WakeUp();
         }
     }

src/nvs.c

@@ -148,7 +148,7 @@ bool NVS_Load(void)
     }
 }
 
-void NVS_Save(void)
+void NVS_Save(bool erase_if_needed)
 {
     NVS_UnlockFlash();
 
@@ -160,6 +160,10 @@ void NVS_Save(void)
     if(current_block == NULL || next_block > NVS_Area + NVS_BLOCK_COUNT
         || !NVS_BlockEmpty(next_block))
     {
+        if(!erase_if_needed)
+        {
+            return;
+        }
         NVS_EraseArea();
         next_block = &NVS_Area[0];
         current_block = NULL;

src/nvs.h

@@ -17,7 +17,8 @@ extern NVS_Data_t *const NVS_Data;
 // defaults were restored instead
 bool NVS_Load(void);
 
-// Stores the current contents of NVS_Data to flash
-void NVS_Save(void);
+// Stores the current contents of NVS_Data to flash. Pass `false` as a parameter
+// to skip saving unless it can be done without a flash page erase.
+void NVS_Save(bool erase_if_needed);