Add Splash Screen duration

MarlinKimbra/Configuration.h

@@ -408,6 +408,9 @@ your extruder heater takes 2 minutes to hit the target on heating.
 // #define LCD_SCREEN_ROT_180
 // #define LCD_SCREEN_ROT_270
 
+// SPLASH SCREEN duration in millisecond
+#define SPLASH_SCREEN_DURATION 2000 // Millisecond
+
 /** Display Voltage Logic Selector on Alligator Board
  0 = Voltage level 3.3V
  1 = Voltage level 5V

MarlinKimbra/Marlin_main.cpp

@@ -713,7 +713,7 @@ void setup() {
   servo_init();
 
   lcd_init();
-  _delay_ms(1000);  // wait 1sec to display the splash screen
+  _delay_ms(SPLASH_SCREEN_DURATION);  // wait to display the splash screen
 
   #if HAS_CONTROLLERFAN
     SET_OUTPUT(CONTROLLERFAN_PIN); //Set pin used for driver cooling fan

MarlinKimbra/conditionals.h

@@ -208,6 +208,14 @@
    * LCD BUZZ
    */
   #define HAS_LCD_BUZZ (defined(ULTRALCD) || (defined(BEEPER) && BEEPER >= 0) || defined(LCD_USE_I2C_BUZZER))
+  
+  /**
+   * SPLASH_SCREEN_DURATION for no DOGLCD display
+   */
+  #ifndef DOGLCD
+    #undef SPLASH_SCREEN_DURATION
+    #define SPLASH_SCREEN_DURATION 500
+  #endif
 
 #else // CONFIGURATION_LCD