Add Switch BackLight action

app/action.c

@@ -105,6 +105,7 @@ void (*action_opt_table[])(void) = {
 	[ACTION_OPT_RXMODE] = &ACTION_RxMode,
 	[ACTION_OPT_PTT] = &ACTION_Ptt,
 	[ACTION_OPT_WN] = &ACTION_Wn,
+	[ACTION_OPT_BACKLIGHT] = &ACTION_BackLight,
 #else
 	[ACTION_OPT_RXMODE] = &FUNCTION_NOP,
 #endif
@@ -487,4 +488,18 @@ void ACTION_Wn(void)
 	BK4819_SetFilterBandwidth(gTxVfo->CHANNEL_BANDWIDTH, false);
 #endif
 }
+
+void ACTION_BackLight(void)
+{
+	gBackLight = true;
+	if(gBacklightBrightnessOld == gEeprom.BACKLIGHT_MAX)
+	{
+		gEeprom.BACKLIGHT_TIME = 0;
+	}
+	else
+	{
+		gEeprom.BACKLIGHT_TIME = 7;
+	}
+	BACKLIGHT_TurnOn();
+}
 #endif

app/action.h

@@ -39,6 +39,7 @@ void ACTION_SwitchDemodul(void);
 	void ACTION_RxMode(void);
 	void ACTION_Ptt(void);
 	void ACTION_Wn(void);
+	void ACTION_BackLight(void);
 #endif
 
 void ACTION_Handle(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld);

app/menu.c

@@ -559,6 +559,9 @@ void MENU_AcceptSetting(void)
 
 		case MENU_ABR:
 			gEeprom.BACKLIGHT_TIME = gSubMenuSelection;
+			#ifdef ENABLE_FEAT_F4HWN
+				gBackLight = false;
+			#endif
 			break;
 
 		case MENU_ABR_MIN: