text: /**
   * 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 <https://www.gnu.org/licenses/>.
   *
   */
  #pragma once
  
  #include "../DGUSDisplayDef.h"
  
  enum DGUSLCD_Screens : uint8_t {
    DGUSLCD_SCREEN_BOOT                 = 160,
    DGUSLCD_SCREEN_MAIN                 =   1,
    DGUSLCD_SCREEN_STATUS               =   1,
    DGUSLCD_SCREEN_STATUS2              =   1,
    DGUSLCD_SCREEN_POWER_LOSS           =  17,
    DGUSLCD_SCREEN_TEMPERATURE          =  40,
    DGUSLCD_SCREEN_MANUALMOVE           =  86,
    DGUSLCD_SCREEN_PREHEAT              =  48,
    DGUSLCD_SCREEN_UTILITY              =  70,
    DGUSLCD_SCREEN_FILAMENT_HEATING     =  80,
    DGUSLCD_SCREEN_FILAMENT_LOADING     =  76,
    DGUSLCD_SCREEN_FILAMENT_UNLOADING   =  82,
    DGUSLCD_SCREEN_MANUALEXTRUDE        =  84,
    DGUSLCD_SCREEN_Z_OFFSET             =  88,
    DGUSLCD_SCREEN_SDFILELIST           =   3,
    DGUSLCD_SCREEN_SDPRINTMANIPULATION  =   7,
    DGUSLCD_SCREEN_SDPRINTTUNE          =   9,
    DGUSLCD_SCREEN_FLC_PREHEAT          =  94,
    DGUSLCD_SCREEN_FLC_PRINTING         =  96,
    DGUSLCD_SCREEN_STEPPERMM            = 122,
    DGUSLCD_SCREEN_PID_E                = 126,
    DGUSLCD_SCREEN_PID_BED              = 128,
    DGUSLCD_SCREEN_INFOS                = 131,
    DGUSLCD_SCREEN_CONFIRM              = 240,
    DGUSLCD_SCREEN_KILL                 = 250, ///< Kill Screen. Must always be 250 (to be able to display "Error wrong LCD Version")
    DGUSLCD_SCREEN_WAITING              = 251,
    DGUSLCD_SCREEN_POPUP                = 252, ///< special target, popup screen will also return this code to say "return to previous screen"
    DGUSLDC_SCREEN_UNUSED               = 255
  };
  
  // Display Memory layout used (T5UID)
  // Except system variables this is arbitrary, just to organize stuff....
  
  // 0x0000 .. 0x0FFF  -- System variables and reserved by the display
  // 0x1000 .. 0x1FFF  -- Variables to never change location, regardless of UI Version
  // 0x2000 .. 0x2FFF  -- Controls (VPs that will trigger some action)
  // 0x3000 .. 0x4FFF  -- Marlin Data to be displayed
  // 0x5000 ..         -- SPs (if we want to modify display elements, e.g change color or like) -- currently unused
  
  // As there is plenty of space (at least most displays have >8k RAM), we do not pack them too tight,
  // so that we can keep variables nicely together in the address space.
  
  // UI Version always on 0x1000...0x1002 so that the firmware can check this and bail out.
  constexpr uint16_t VP_UI_VERSION_MAJOR = 0x1000;  // Major -- incremented when incompatible
  constexpr uint16_t VP_UI_VERSION_MINOR = 0x1001;  // Minor -- incremented on new features, but compatible
  constexpr uint16_t VP_UI_VERSION_PATCH = 0x1002;  // Patch -- fixed which do not change functionality.
  constexpr uint16_t VP_UI_FLAVOUR       = 0x1010;  // lets reserve 16 bytes here to determine if UI is suitable for this Marlin. tbd.
  
  // Storage space for the Killscreen messages. 0x1100 - 0x1200 . Reused for the popup.
  constexpr uint16_t VP_MSGSTR1 = 0x1100;
  constexpr uint8_t VP_MSGSTR1_LEN = 0x20;  // might be more place for it...
  constexpr uint16_t VP_MSGSTR2 = 0x1140;
  constexpr uint8_t VP_MSGSTR2_LEN = 0x20;
  constexpr uint16_t VP_MSGSTR3 = 0x1180;
  constexpr uint8_t VP_MSGSTR3_LEN = 0x20;
  constexpr uint16_t VP_MSGSTR4 = 0x11C0;
  constexpr uint8_t VP_MSGSTR4_LEN = 0x20;
  
  // Screenchange request for screens that only make sense when printer is idle.
  // e.g movement is only allowed if printer is not printing.
  // Marlin must confirm by setting the screen manually.
  constexpr uint16_t VP_SCREENCHANGE_ASK = 0x2000;
  constexpr uint16_t VP_SCREENCHANGE = 0x2001;   // Key-Return button to new menu pressed. Data contains target screen in low byte and info in high byte.
  constexpr uint16_t VP_TEMP_ALL_OFF = 0x2002;   // Turn all heaters off. Value arbitrary ;)=
  constexpr uint16_t VP_SCREENCHANGE_WHENSD = 0x2003; // "Print" Button touched -- go only there if there is an SD Card.
  
  constexpr uint16_t VP_CONFIRMED = 0x2010; // OK on confirm screen.
  
  // Buttons on the SD-Card File listing.
  constexpr uint16_t VP_SD_ScrollEvent = 0x2020; // Data: 0 for "up a directory", numbers are the amount to scroll, e.g -1 one up, 1 one down
  constexpr uint16_t VP_SD_FileSelected = 0x2022; // Number of file field selected.
  constexpr uint16_t VP_SD_FileSelectConfirm = 0x2024; // (This is a virtual VP and emulated by the Confirm Screen when a file has been confirmed)
  
  constexpr uint16_t VP_SD_ResumePauseAbort = 0x2026; // Resume(Data=0), Pause(Data=1), Abort(Data=2) SD Card prints
  constexpr uint16_t VP_SD_AbortPrintConfirmed = 0x2028; // Abort print confirmation (virtual, will be injected by the confirm dialog)
  constexpr uint16_t VP_SD_Print_Setting = 0x2040;
  constexpr uint16_t VP_SD_Print_LiveAdjustZ = 0x2050; // Data: 0 down, 1 up
  
  // Controls for movement (we can't use the incremental / decremental feature of the display at this feature works only with 16 bit values
  // (which would limit us to 655.35mm, which is likely not a problem for common setups, but i don't want to rule out hangprinters support)
  // A word about the coding: The VP will be per axis and the return code will be an signed 16 bit value in 0.01 mm resolution, telling us
  // the relative travel amount t he user wants to do. So eg. if the display sends us VP=2100 with value 100, the user wants us to move X by +1 mm.
  constexpr uint16_t VP_MOVE_X = 0x2100;
  constexpr uint16_t VP_MOVE_Y = 0x2102;
  constexpr uint16_t VP_MOVE_Z = 0x2104;
  constexpr uint16_t VP_MOVE_E0 = 0x2110;
  constexpr uint16_t VP_MOVE_E1 = 0x2112;
  //constexpr uint16_t VP_MOVE_E2 = 0x2114;
  //constexpr uint16_t VP_MOVE_E3 = 0x2116;
  //constexpr uint16_t VP_MOVE_E4 = 0x2118;
  //constexpr uint16_t VP_MOVE_E5 = 0x211A;
  constexpr uint16_t VP_HOME_ALL = 0x2120;
  constexpr uint16_t VP_MOTOR_LOCK_UNLOK = 0x2130;
  
  // Power loss recovery
  constexpr uint16_t VP_POWER_LOSS_RECOVERY = 0x2180;
  
  // Fan Control Buttons , switch between "off" and "on"
  constexpr uint16_t VP_FAN0_CONTROL = 0x2200;
  constexpr uint16_t VP_FAN1_CONTROL = 0x2202;
  //constexpr uint16_t VP_FAN2_CONTROL = 0x2204;
  //constexpr uint16_t VP_FAN3_CONTROL = 0x2206;
  
  // Heater Control Buttons , triged between "cool down" and "heat PLA" state
  constexpr uint16_t VP_E0_CONTROL = 0x2210;
  constexpr uint16_t VP_E1_CONTROL = 0x2212;
  //constexpr uint16_t VP_E2_CONTROL = 0x2214;
  //constexpr uint16_t VP_E3_CONTROL = 0x2216;
  //constexpr uint16_t VP_E4_CONTROL = 0x2218;
  //constexpr uint16_t VP_E5_CONTROL = 0x221A;
  constexpr uint16_t VP_BED_CONTROL = 0x221C;
  
  // Preheat
  constexpr uint16_t VP_E0_BED_PREHEAT = 0x2220;
  //constexpr uint16_t VP_E1_BED_PREHEAT = 0x2222;
  //constexpr uint16_t VP_E2_BED_PREHEAT = 0x2224;
  //constexpr uint16_t VP_E3_BED_PREHEAT = 0x2226;
  //constexpr uint16_t VP_E4_BED_PREHEAT = 0x2228;
  //constexpr uint16_t VP_E5_BED_PREHEAT = 0x222A;
  
  // Filament load and unload
  constexpr uint16_t VP_E0_FILAMENT_LOAD_UNLOAD = 0x2300;
  
  // Settings store , reset
  constexpr uint16_t VP_SETTINGS = 0x2400;
  
  // PID autotune
  constexpr uint16_t VP_PID_AUTOTUNE_E0 = 0x2410;
  //constexpr uint16_t VP_PID_AUTOTUNE_E1 = 0x2412;
  //constexpr uint16_t VP_PID_AUTOTUNE_E2 = 0x2414;
  //constexpr uint16_t VP_PID_AUTOTUNE_E3 = 0x2416;
  //constexpr uint16_t VP_PID_AUTOTUNE_E4 = 0x2418;
  //constexpr uint16_t VP_PID_AUTOTUNE_E5 = 0x241A;
  constexpr uint16_t VP_PID_AUTOTUNE_BED = 0x2420;
  
  // Calibrate Z
  constexpr uint16_t VP_Z_CALIBRATE = 0x2430;
  
  // First layer cal
  constexpr uint16_t VP_Z_FIRST_LAYER_CAL = 0x2500; // Data: 0 - Cancel first layer cal progress, >0 filament type have loaded
  
  // Firmware version on the boot screen.
  constexpr uint16_t VP_MARLIN_VERSION = 0x3000;
  constexpr uint8_t VP_MARLIN_VERSION_LEN = 16;   // there is more space on the display, if needed.
  
  // Place for status messages.
  constexpr uint16_t VP_M117 = 0x3020;
  constexpr uint8_t VP_M117_LEN = 0x20;
  
  // Temperatures.
  constexpr uint16_t VP_T_E0_Is = 0x3060;  // 4 Byte Integer
  constexpr uint16_t VP_T_E0_Set = 0x3062; // 2 Byte Integer
  constexpr uint16_t VP_T_E1_Is = 0x3064;  // 4 Byte Integer
  
  // reserved to support up to 6 Extruders:
  //constexpr uint16_t VP_T_E1_Set = 0x3066; // 2 Byte Integer
  //constexpr uint16_t VP_T_E2_Is = 0x3068;  // 4 Byte Integer
  //constexpr uint16_t VP_T_E2_Set = 0x306A; // 2 Byte Integer
  //constexpr uint16_t VP_T_E3_Is = 0x306C;  // 4 Byte Integer
  //constexpr uint16_t VP_T_E3_Set = 0x306E; // 2 Byte Integer
  //constexpr uint16_t VP_T_E4_Is = 0x3070;  // 4 Byte Integer
  //constexpr uint16_t VP_T_E4_Set = 0x3072; // 2 Byte Integer
  //constexpr uint16_t VP_T_E4_Is = 0x3074;  // 4 Byte Integer
  //constexpr uint16_t VP_T_E4_Set = 0x3076; // 2 Byte Integer
  //constexpr uint16_t VP_T_E5_Is = 0x3078;  // 4 Byte Integer
  //constexpr uint16_t VP_T_E5_Set = 0x307A; // 2 Byte Integer
  
  constexpr uint16_t VP_T_Bed_Is = 0x3080;  // 4 Byte Integer
  constexpr uint16_t VP_T_Bed_Set = 0x3082; // 2 Byte Integer
  
  constexpr uint16_t VP_Flowrate_E0 = 0x3090; // 2 Byte Integer
  constexpr uint16_t VP_Flowrate_E1 = 0x3092; // 2 Byte Integer
  
  // reserved for up to 6 Extruders:
  //constexpr uint16_t VP_Flowrate_E2 = 0x3094;
  //constexpr uint16_t VP_Flowrate_E3 = 0x3096;
  //constexpr uint16_t VP_Flowrate_E4 = 0x3098;
  //constexpr uint16_t VP_Flowrate_E5 = 0x309A;
  
  constexpr uint16_t VP_Fan0_Percentage = 0x3100;  // 2 Byte Integer (0..100)
  constexpr uint16_t VP_Fan1_Percentage = 0x3102;  // 2 Byte Integer (0..100)
  constexpr uint16_t VP_Fan2_Percentage = 0x3104;  // 2 Byte Integer (0..100)
  constexpr uint16_t VP_Fan3_Percentage = 0x3106;  // 2 Byte Integer (0..100)
  constexpr uint16_t VP_Feedrate_Percentage = 0x3108; // 2 Byte Integer (0..100)
  
  // Actual Position
  constexpr uint16_t VP_XPos = 0x3110;  // 4 Byte Fixed point number; format xxx.yy
  constexpr uint16_t VP_YPos = 0x3112;  // 4 Byte Fixed point number; format xxx.yy
  constexpr uint16_t VP_ZPos = 0x3114;  // 4 Byte Fixed point number; format xxx.yy
  
  constexpr uint16_t VP_EPos = 0x3120;  // 4 Byte Fixed point number; format xxx.yy
  
  constexpr uint16_t VP_PrintProgress_Percentage = 0x3130; // 2 Byte Integer (0..100)
  
  constexpr uint16_t VP_PrintTime = 0x3140;
  constexpr uint16_t VP_PrintTime_LEN = 32;
  
  constexpr uint16_t VP_PrintAccTime = 0x3160;
  constexpr uint16_t VP_PrintAccTime_LEN = 32;
  
  constexpr uint16_t VP_PrintsTotal = 0x3180;
  constexpr uint16_t VP_PrintsTotal_LEN = 16;
  
  // SDCard File Listing
  constexpr uint16_t VP_SD_FileName_LEN = 32; // LEN is shared for all entries.
  constexpr uint16_t DGUS_SD_FILESPERSCREEN = 5; // FIXME move that info to the display and read it from there.
  constexpr uint16_t VP_SD_FileName0 = 0x3200;
  constexpr uint16_t VP_SD_FileName1 = 0x3220;
  constexpr uint16_t VP_SD_FileName2 = 0x3240;
  constexpr uint16_t VP_SD_FileName3 = 0x3260;
  constexpr uint16_t VP_SD_FileName4 = 0x3280;
  
  constexpr uint16_t VP_SD_Print_ProbeOffsetZ = 0x32A0; //
  
  constexpr uint16_t VP_SD_Print_Filename = 0x32C0; //
  // Fan status
  constexpr uint16_t VP_FAN0_STATUS = 0x3300;
  constexpr uint16_t VP_FAN1_STATUS = 0x3302;
  //constexpr uint16_t VP_FAN2_STATUS = 0x3304;
  //constexpr uint16_t VP_FAN3_STATUS = 0x3306;
  
  // Heater status
  constexpr uint16_t VP_E0_STATUS = 0x3310;
  //constexpr uint16_t VP_E1_STATUS = 0x3312;
  //constexpr uint16_t VP_E2_STATUS = 0x3314;
  //constexpr uint16_t VP_E3_STATUS = 0x3316;
  //constexpr uint16_t VP_E4_STATUS = 0x3318;
  //constexpr uint16_t VP_E5_STATUS = 0x331A;
  constexpr uint16_t VP_BED_STATUS = 0x331C;
  
  constexpr uint16_t VP_MOVE_OPTION = 0x3400;
  
  // Step per mm
  constexpr uint16_t VP_X_STEP_PER_MM = 0x3600; // at the moment , 2 byte unsigned int , 0~1638.4
  //constexpr uint16_t VP_X2_STEP_PER_MM = 0x3602;
  constexpr uint16_t VP_Y_STEP_PER_MM = 0x3604;
  //constexpr uint16_t VP_Y2_STEP_PER_MM = 0x3606;
  constexpr uint16_t VP_Z_STEP_PER_MM = 0x3608;
  //constexpr uint16_t VP_Z2_STEP_PER_MM = 0x360A;
  constexpr uint16_t VP_E0_STEP_PER_MM = 0x3610;
  //constexpr uint16_t VP_E1_STEP_PER_MM = 0x3612;
  //constexpr uint16_t VP_E2_STEP_PER_MM = 0x3614;
  //constexpr uint16_t VP_E3_STEP_PER_MM = 0x3616;
  //constexpr uint16_t VP_E4_STEP_PER_MM = 0x3618;
  //constexpr uint16_t VP_E5_STEP_PER_MM = 0x361A;
  
  // PIDs
  constexpr uint16_t VP_E0_PID_P = 0x3700; // at the moment , 2 byte unsigned int , 0~1638.4
  constexpr uint16_t VP_E0_PID_I = 0x3702;
  constexpr uint16_t VP_E0_PID_D = 0x3704;
  constexpr uint16_t VP_BED_PID_P = 0x3710;
  constexpr uint16_t VP_BED_PID_I = 0x3712;
  constexpr uint16_t VP_BED_PID_D = 0x3714;
  
  // Wating screen status
  constexpr uint16_t VP_WAITING_STATUS = 0x3800;
  
  // SPs for certain variables...
  // located at 0x5000 and up
  // Not used yet!
  // This can be used e.g to make controls / data display invisible
  constexpr uint16_t SP_T_E0_Is = 0x5000;
  constexpr uint16_t SP_T_E0_Set = 0x5010;
  constexpr uint16_t SP_T_E1_Is = 0x5020;
  constexpr uint16_t SP_T_Bed_Is = 0x5030;
  constexpr uint16_t SP_T_Bed_Set = 0x5040;
  