Hintergrundbeleuchtung geht nach 3 Minuten aus und mit dem ersten Tastendruck wieder an

Source/Button.cpp

@@ -27,18 +27,23 @@ namespace ElektronischeLast
 		this->debounceTimer = systick;
 	}
 
-	void Button::cyclic(void)
+	bool Button::cyclic(void)
 	{
+	  bool changed = false;
+
 	  if((systick - this->debounceTimer) > this->debounce)
 	  {
 	    bool state = LL_GPIO_IsInputPinSet(this->port, this->pin);
       this->stateLast = this->state;
 	    if(state != this->state)
 	    {
+	      changed = true;
 	      this->debounceTimer = systick;
 	      this->state = state;
 	    }
 	  }
+
+	  return changed;
 	}
 
 	bool Button::isPressed(void)

Source/Button.hpp

@@ -23,7 +23,7 @@ namespace ElektronischeLast
 	    uint32_t debounceTimer;
 	  public:
 	    void init(GPIO_TypeDef* port, uint16_t pin);
-	    void cyclic(void);
+	    bool cyclic(void);
 	    bool isPressed(void);
 	    bool isReleased(void);
 	};

Source/Menu.cpp

@@ -17,7 +17,8 @@
 
 namespace ElektronischeLast
 {
-  static Timer timer = Timer();
+  static Timer timer_MainScreen = Timer();
+  static Timer timer_Backlight = Timer();
   static Button ok = Button();
   static Button up = Button();
   static Button down = Button();
@@ -28,7 +29,8 @@ namespace ElektronischeLast
 
 	void Menu::init()
 	{
-	  timer.start(500U);
+	  timer_MainScreen.start(500U);
+	  timer_Backlight.start(3UL * 60UL * 1000UL);
 	  ok.init(GPIOA, LL_GPIO_PIN_7);
 	  up.init(GPIOA, LL_GPIO_PIN_9);
 	  down.init(GPIOA, LL_GPIO_PIN_8);
@@ -76,9 +78,27 @@ namespace ElektronischeLast
 
 	void Menu::run()
 	{
-		ok.cyclic();
-		up.cyclic();
-		down.cyclic();
+		if(ok.cyclic())
+		{
+		  timer_Backlight.restart();
+		  lcd.set_backlight(true);
+		}
+		if(up.cyclic())
+    {
+      timer_Backlight.restart();
+      lcd.set_backlight(true);
+    }
+		if(down.cyclic())
+    {
+      timer_Backlight.restart();
+      lcd.set_backlight(true);
+    }
+
+		if(timer_Backlight.elapsed())
+		{
+			lcd.set_backlight(false);
+			this->menu_locked = true;
+		}
 
 		switch(menu_level)
 		{
@@ -110,11 +130,11 @@ namespace ElektronischeLast
 
 	void Menu::menu_main(void)
 	{
-	  if(timer.elapsed())
+	  if(timer_MainScreen.elapsed())
     {
       if(lcd.ready_for_data())
       {
-        timer.start(500U);
+        timer_MainScreen.start(500U);
 
         char data[17U];
 
@@ -143,8 +163,15 @@ namespace ElektronischeLast
 
 	  if(ok.isReleased())
 	  {
-	    this->menu_level = MenuLevel_ISoll;
-	    this->configurations = 0UL;
+	    if(this->menu_locked)
+	    {
+	      this->menu_locked = false;
+	    }
+	    else
+	    {
+        this->menu_level = MenuLevel_ISoll;
+        this->configurations = 0UL;
+	    }
 	  }
 	}
 

Source/Menu.hpp

@@ -38,6 +38,8 @@ namespace ElektronischeLast
 
 	    uint8_t configurations = 0U;
 
+	    bool menu_locked = false;
+
 			void menu_main(void);
 			void menu_call(void);
 			void menu_icall_init(void);

Source/Timer.cpp

@@ -22,6 +22,12 @@ namespace ElektronischeLast
     this->isRunning = true;
   }
 
+  void Timer::restart(void)
+	{
+		this->timer_start = systick;
+		this->isRunning = true;
+	}
+
   void Timer::stop(void)
   {
   this->isRunning = false;

Source/Timer.hpp

@@ -21,6 +21,7 @@ namespace ElektronischeLast
     public:
       Timer();
       void start(uint32_t durationMs);
+      void restart(void);
       void stop(void);
       bool elapsed(void);
       void tick(void);