Merge pull request #1823 from AnHardt/splashscreen

Disable splash-screen when done once

Marlin/dogm_lcd_implementation.h

   return n;
 }
 
+static bool show_splashscreen = true;
+
 static void lcd_implementation_init()
 {
   #ifdef LCD_PIN_BL // Enable LCD backlight
 
 	u8g.firstPage();
 	do {
-    u8g.drawBitmapP(offx, offy, START_BMPBYTEWIDTH, START_BMPHEIGHT, start_bmp);
-    lcd_setFont(FONT_MENU);
-    #ifndef STRING_SPLASH_LINE2
-      u8g.drawStr(txt1X, u8g.getHeight() - DOG_CHAR_HEIGHT, STRING_SPLASH_LINE1);
-    #else
-      int txt2X = (u8g.getWidth() - (sizeof(STRING_SPLASH_LINE2) - 1)*DOG_CHAR_WIDTH) / 2;
-      u8g.drawStr(txt1X, u8g.getHeight() - DOG_CHAR_HEIGHT*3/2, STRING_SPLASH_LINE1);
-      u8g.drawStr(txt2X, u8g.getHeight() - DOG_CHAR_HEIGHT*1/2, STRING_SPLASH_LINE2);
-    #endif
+    if (show_splashscreen) {
+      u8g.drawBitmapP(offx, offy, START_BMPBYTEWIDTH, START_BMPHEIGHT, start_bmp);
+      lcd_setFont(FONT_MENU);
+      #ifndef STRING_SPLASH_LINE2
+        u8g.drawStr(txt1X, u8g.getHeight() - DOG_CHAR_HEIGHT, STRING_SPLASH_LINE1);
+      #else
+        int txt2X = (u8g.getWidth() - (sizeof(STRING_SPLASH_LINE2) - 1)*DOG_CHAR_WIDTH) / 2;
+        u8g.drawStr(txt1X, u8g.getHeight() - DOG_CHAR_HEIGHT*3/2, STRING_SPLASH_LINE1);
+        u8g.drawStr(txt2X, u8g.getHeight() - DOG_CHAR_HEIGHT*1/2, STRING_SPLASH_LINE2);
+      #endif
+    }
 	} while (u8g.nextPage());
+  show_splashscreen = false;
 }
 
 static void lcd_implementation_clear() { } // Automatically cleared by Picture Loop