Add MKS UI (TFT_LITTLE_VGL_UI) (#18071)

Marlin/src/lcd/extui/lib/mks_ui/printer_opration.h

@@ -0,0 +1,36 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#ifdef __cplusplus
+extern "C" { /* C-declarations for C++ */
+#endif
+
+#define MIN_FILE_PRINTED   100 //5000
+
+extern void printer_state_polling();
+extern void filament_pin_setup();
+extern void filament_check();
+
+#ifdef __cplusplus
+} /* C-declarations for C++ */
+#endif