Tweak tests, consolidate pins target validation (#21254)

Marlin/src/pins/esp32/env_validate.h

+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 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
+
+#if NOT_TARGET(ARDUINO_ARCH_ESP32)
+  #error "Oops! Select an ESP32 board in 'Tools > Board.'"
+#endif

Marlin/src/pins/esp32/pins_E4D.h

  * for more info check https://atbox.tech/ and join to Facebook page E4d@box.
  */
 
-#if NOT_TARGET(ARDUINO_ARCH_ESP32)
-  #error "Oops! Select an ESP32 board in 'Tools > Board.'"
-#elif EXTRUDERS > 1 || E_STEPPERS > 1
+#include "env_validate.h"
+
+#if EXTRUDERS > 1 || E_STEPPERS > 1
   #error "E4d@box only supports one E Stepper. Comment out this line to continue."
 #elif HOTENDS > 1
   #error "E4d@box only supports one hotend / E-stepper. Comment out this line to continue."

Marlin/src/pins/esp32/pins_ESP32.h

  * Espressif ESP32 (Tensilica Xtensa LX6) pin assignments
  */
 
-#if NOT_TARGET(ARDUINO_ARCH_ESP32)
-  "Oops! Select an ESP32 board in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Espressif ESP32"
 

Marlin/src/pins/esp32/pins_FYSETC_E4.h

  * Supports 4 stepper drivers, heated bed, single hotend.
  */
 
-#ifndef ARDUINO_ARCH_ESP32
-  #error "Oops! Select an ESP32 board in 'Tools > Board.'"
-#elif EXTRUDERS > 1 || E_STEPPERS > 1
+#include "env_validate.h"
+
+#if EXTRUDERS > 1 || E_STEPPERS > 1
   #error "FYSETC E4 only supports one E Stepper. Comment out this line to continue."
 #elif HOTENDS > 1
   #error "FYSETC E4 only supports one hotend / E-stepper. Comment out this line to continue."

Marlin/src/pins/esp32/pins_MRR_ESPA.h

  * Supports 4 stepper drivers, heated bed, single hotend.
  */
 
-#if NOT_TARGET(ARDUINO_ARCH_ESP32)
-  #error "Oops! Select an ESP32 board in 'Tools > Board.'"
-#elif EXTRUDERS > 1 || E_STEPPERS > 1
+#include "env_validate.h"
+
+#if EXTRUDERS > 1 || E_STEPPERS > 1
   #error "MRR ESPA only supports one E Stepper. Comment out this line to continue."
 #elif HOTENDS > 1
   #error "MRR ESPA only supports one hotend / E-stepper. Comment out this line to continue."

Marlin/src/pins/esp32/pins_MRR_ESPE.h

  * single hotend, and LCD controller.
  */
 
-#if NOT_TARGET(ARDUINO_ARCH_ESP32)
-  #error "Oops! Select an ESP32 board in 'Tools > Board.'"
-#elif EXTRUDERS > 2 || E_STEPPERS > 2
+#include "env_validate.h"
+
+#if EXTRUDERS > 2 || E_STEPPERS > 2
   #error "MRR ESPE only supports two E Steppers. Comment out this line to continue."
 #elif HOTENDS > 1
   #error "MRR ESPE only supports one hotend / E-stepper. Comment out this line to continue."

Marlin/src/pins/lpc1768/env_validate.h

+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 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
+
+#if ENABLED(REQUIRE_LPC1769) && NOT_TARGET(MCU_LPC1769)
+  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
+#elif DISABLED(REQUIRE_LPC1769) && NOT_TARGET(MCU_LPC1768)
+  #error "Oops! Make sure you have the LPC1768 environment selected in your IDE."
+#endif
+
+#undef REQUIRE_LPC1769

Marlin/src/pins/lpc1768/pins_AZSMZ_MINI.h

  * AZSMZ MINI pin assignments
  */
 
-#if NOT_TARGET(MCU_LPC1768)
-  #error "Oops! Make sure you have the LPC1768 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "AZSMZ MINI"
 

Marlin/src/pins/lpc1768/pins_BIQU_B300_V1.0.h

  *  BOARD_BIQU_BQ111_A4 (Hotend, Fan, Bed)
  */
 
-#if NOT_TARGET(MCU_LPC1768)
-  #error "Oops! Make sure you have the LPC1768 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "BIQU Thunder B300 V1.0"

Marlin/src/pins/lpc1768/pins_BIQU_BQ111_A4.h

  *  BOARD_BIQU_BQ111_A4 (Hotend, Fan, Bed)
  */
 
-#if NOT_TARGET(MCU_LPC1768)
-  #error "Oops! Make sure you have the LPC1768 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "BIQU BQ111-A4"
 

Marlin/src/pins/lpc1768/pins_BTT_SKR_V1_4.h

  */
 #pragma once
 
+#include "env_validate.h"
+
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "BTT SKR V1.4"
 #endif
 
-#ifndef BOARD_CUSTOM_BUILD_FLAGS
-  #define BOARD_CUSTOM_BUILD_FLAGS -DLPC_PINCFG_UART3_P4_28
-#endif
-
 //
 // SD Connection
 //

Marlin/src/pins/lpc1768/pins_BTT_SKR_common.h

  */
 #pragma once
 
-#if ENABLED(SKR_HAS_LPC1769)
-  #if NOT_TARGET(MCU_LPC1769)
-    #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-  #endif
-#elif NOT_TARGET(MCU_LPC1768)
-  #error "Oops! Make sure you have the LPC1768 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 // If you have the Big tree tech driver expansion module, enable HAS_BTT_EXP_MOT
 // https://github.com/bigtreetech/BTT-Expansion-module/tree/master/BTT%20EXP-MOT

Marlin/src/pins/lpc1768/pins_GMARSH_X6_REV1.h

  */
 #pragma once
 
-#if NOT_TARGET(MCU_LPC1768)
-  #error "Oops! Make sure you have the LPC1768 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "GMARSH X6 REV1"
 

Marlin/src/pins/lpc1768/pins_MKS_SBASE.h

  * MKS SBASE pin assignments
  */
 
-#if defined(MKS_HAS_LPC1769) && NOT_TARGET(MCU_LPC1769)
-  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-#elif !defined(MKS_HAS_LPC1769) && NOT_TARGET(MCU_LPC1768)
-  #error "Oops! Make sure you have the LPC1768 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME   "MKS SBASE"

Marlin/src/pins/lpc1768/pins_MKS_SGEN_L.h

  * MKS SGEN-L pin assignments
  */
 
-#if NOT_TARGET(MCU_LPC1768)
-  #error "Oops! Make sure you have the LPC1768 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME   "MKS SGen-L"
 #define BOARD_WEBSITE_URL "github.com/makerbase-mks/MKS-SGEN_L"

Marlin/src/pins/lpc1768/pins_RAMPS_RE_ARM.h

 
 // Numbers in parentheses () are the corresponding mega2560 pin numbers
 
-#if NOT_TARGET(MCU_LPC1768)
-  #error "Oops! Make sure you have the LPC1768 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Re-ARM RAMPS 1.4"
 

Marlin/src/pins/lpc1768/pins_SELENA_COMPACT.h

  * Selena Compact pin assignments
  */
 
-#if NOT_TARGET(MCU_LPC1768)
-  #error "Oops! Make sure you have the LPC1768 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME   "Selena Compact"
 #define BOARD_WEBSITE_URL "github.com/Ales2-k/Selena"

Marlin/src/pins/lpc1769/env_validate.h

+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 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
+
+#if NOT_TARGET(MCU_LPC1769)
+  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
+#endif

Marlin/src/pins/lpc1769/pins_AZTEEG_X5_GT.h

  * Azteeg X5 GT pin assignments
  */
 
-#if NOT_TARGET(MCU_LPC1769)
-  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME   "Azteeg X5 GT"
 #define BOARD_WEBSITE_URL "tinyurl.com/yx8tdqa3"

Marlin/src/pins/lpc1769/pins_AZTEEG_X5_MINI.h

 /**
  * Azteeg X5 MINI pin assignments
  */
-
-#if NOT_TARGET(MCU_LPC1769)
-  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "Azteeg X5 MINI"

Marlin/src/pins/lpc1769/pins_AZTEEG_X5_MINI_WIFI.h

 #pragma once
 
 /**
- * Azteeg X5 MINI pin assignments
+ * Azteeg X5 MINI WIFI pin assignments
  */
 
-#if NOT_TARGET(MCU_LPC1769)
-  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Azteeg X5 MINI WIFI"
 

Marlin/src/pins/lpc1769/pins_BTT_SKR_E3_TURBO.h

  */
 #pragma once
 
+#include "env_validate.h"
+
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "BTT SKR E3 Turbo"
 #endif

Marlin/src/pins/lpc1769/pins_BTT_SKR_V1_4_TURBO.h

 #pragma once
 
 #define BOARD_INFO_NAME "BTT SKR V1.4 TURBO"
-#define SKR_HAS_LPC1769
 
 //
 // Include SKR 1.4 pins
 //
+#define REQUIRE_LPC1769
 #include "../lpc1768/pins_BTT_SKR_V1_4.h"

Marlin/src/pins/lpc1769/pins_COHESION3D_MINI.h

  * Cohesion3D Mini pin assignments
  */
 
-#if NOT_TARGET(MCU_LPC1769)
-  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Cohesion3D Mini"
 

Marlin/src/pins/lpc1769/pins_COHESION3D_REMIX.h

  * Cohesion3D ReMix pin assignments
  */
 
-#if NOT_TARGET(MCU_LPC1769)
-  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Cohesion3D ReMix"
 

Marlin/src/pins/lpc1769/pins_FLY_CDY.h

  */
 #pragma once
 
-#if NOT_TARGET(MCU_LPC1769)
-  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME   "FLY-CDY"
 #define BOARD_WEBSITE_URL "github.com/FLYmaker/FLY-CDY"

Marlin/src/pins/lpc1769/pins_MKS_SGEN.h

  * https://github.com/makerbase-mks/MKS-SGen/blob/master/Hardware/MKS%20SGEN%20V1.0_001/MKS%20SGEN%20V1.0_001%20PIN.pdf
  */
 
-#if NOT_TARGET(MCU_LPC1769)
-  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-#endif
-
 #define BOARD_INFO_NAME   "MKS SGen"
 #define BOARD_WEBSITE_URL "github.com/makerbase-mks/MKS-SGEN"
 
-#define MKS_HAS_LPC1769
+#define REQUIRE_LPC1769
 #include "../lpc1768/pins_MKS_SBASE.h"
 
 #if HAS_TMC_UART

Marlin/src/pins/lpc1769/pins_MKS_SGEN_L_V2.h

  * MKS SGen pin assignments
  */
 
-#if NOT_TARGET(MCU_LPC1769)
-  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME   "MKS SGEN_L V2"
 #define BOARD_WEBSITE_URL "github.com/makerbase-mks"

Marlin/src/pins/lpc1769/pins_SMOOTHIEBOARD.h

  * Smoothieboard pin assignments
  */
 
-#if NOT_TARGET(MCU_LPC1769)
-  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME   "Smoothieboard"
 #define BOARD_WEBSITE_URL "smoothieware.org/smoothieboard"

Marlin/src/pins/lpc1769/pins_TH3D_EZBOARD.h

  * TH3D EZBoard pin assignments
  */
 
-#if NOT_TARGET(MCU_LPC1769)
-  #error "Oops! Make sure you have the LPC1769 environment selected in your IDE."
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME   "TH3D EZBoard"
 #define BOARD_WEBSITE_URL "th3dstudio.com"

Marlin/src/pins/mega/env_validate.h

+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 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
+
+#if ENABLED(ALLOW_MEGA1280) && NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
+  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560 or 1280' in 'Tools > Board.'"
+#elif NOT_TARGET(__AVR_ATmega2560__)
+  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
+#endif
+
+#undef ALLOW_MEGA1280

Marlin/src/pins/mega/pins_CHEAPTRONIC.h

  * Cheaptronic v1.0 pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Cheaptronic v1.0"
 //

Marlin/src/pins/mega/pins_CHEAPTRONICv2.h

  *          www.reprapobchod.cz
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Cheaptronic v2.0"
 

Marlin/src/pins/mega/pins_CNCONTROLS_11.h

  * CartesioV11 pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#define ALLOW_MEGA1280
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "CN Controls V11"
 

Marlin/src/pins/mega/pins_CNCONTROLS_12.h

  * CartesioV12 pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#define ALLOW_MEGA1280
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "CN Controls V12"
 

Marlin/src/pins/mega/pins_CNCONTROLS_15.h

  * CNControls V15 for HMS434 pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#define ALLOW_MEGA1280
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "CN Controls V15"
 

Marlin/src/pins/mega/pins_EINSTART-S.h

  * PCB Silkscreen: 3DPrinterCon_v3.5
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#define ALLOW_MEGA1280
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Einstart-S"
 

Marlin/src/pins/mega/pins_ELEFU_3.h

  * Elefu RA Board Pin Assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Elefu Ra v3"
 

Marlin/src/pins/mega/pins_GT2560_REV_A.h

  * Richard Smith <galorin@gmail.com>
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#define ALLOW_MEGA1280
+#include "env_validate.h"
 
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "GT2560 Rev.A"

Marlin/src/pins/mega/pins_GT2560_V3.h

  * Geeetech GT2560 RevB + GT2560 3.0/3.1 + GT2560 4.0/4.1 pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#define ALLOW_MEGA1280
+#include "env_validate.h"
 
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "GT2560 RevB/3.x/4.x"

Marlin/src/pins/mega/pins_HJC2560C_REV2.h

  * Geeetech HJC2560-C Rev 2.x board pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define DEFAULT_MACHINE_NAME "ADIMLab Gantry v2"
 #define BOARD_INFO_NAME      "HJC2560-C"

Marlin/src/pins/mega/pins_INTAMSYS40.h

  * 2208 version exists and may or may not work
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Intamsys 4.0"
 

Marlin/src/pins/mega/pins_LEAPFROG.h

  * Leapfrog Driver board pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Mega 1280' or 'Mega 2560' in 'Tools > Board.'"
-#endif
+#define ALLOW_MEGA1280
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Leapfrog"
 

Marlin/src/pins/mega/pins_LEAPFROG_XEED2015.h

  * printer models. As such this file is currently specific to the Xeed.
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Leapfrog Xeed 2015"
 

Marlin/src/pins/mega/pins_MEGACONTROLLER.h

  * Mega controller pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 2 || E_STEPPERS > 2
+#if HOTENDS > 2 || E_STEPPERS > 2
   #error "Mega Controller supports up to 2 hotends / E-steppers. Comment out this line to continue."
 #endif
 
+#include "env_validate.h"
+
 #define BOARD_INFO_NAME "Mega Controller"
 
 //

Marlin/src/pins/mega/pins_MEGATRONICS.h

  * MegaTronics pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Megatronics"
 //

Marlin/src/pins/mega/pins_MEGATRONICS_2.h

  * MegaTronics v2.0 pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Megatronics v2.0"
 //

Marlin/src/pins/mega/pins_MEGATRONICS_3.h

  * MegaTronics v3.0 / v3.1 / v3.2 pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #if MB(MEGATRONICS_32)
   #define BOARD_INFO_NAME "Megatronics v3.2"

Marlin/src/pins/mega/pins_MIGHTYBOARD_REVE.h

  *  number (B5) agrees with the schematic but B5 is assigned to logical pin 11.
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Mega 1280' or 'Mega 2560' in 'Tools > Board.'"
-#endif
+#define ALLOW_MEGA1280
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME      "Mightyboard"
 #define DEFAULT_MACHINE_NAME "MB Replicator"

Marlin/src/pins/mega/pins_OVERLORD.h

  * Dreammaker Overlord v1.1 pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 2 || E_STEPPERS > 2
+#if HOTENDS > 2 || E_STEPPERS > 2
   #error "Overlord Controller supports up to 2 hotends / E-steppers. Comment out this line to continue."
 #endif
 
+#include "env_validate.h"
+
 #define BOARD_INFO_NAME         "OVERLORD"
 #define DEFAULT_MACHINE_NAME    BOARD_INFO_NAME
 

Marlin/src/pins/mega/pins_PICA.h

  * Applies to PICA, PICA_REVB
  */
 
+#include "env_validate.h"
+
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "PICA"
 #endif
   AD12 = 66;  AD13 = 67;  AD14 = 68;  AD15 = 69;
 */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
-#endif
-
 //
 // Servos
 //

Marlin/src/pins/mega/pins_WANHAO_ONEPLUS.h

  * Wanhao 0ne+ pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME      "Wanhao i3 Mini 0ne+"
 #define DEFAULT_MACHINE_NAME "i3 Mini"

Marlin/src/pins/pins.h

 #elif MB(BTT_SKR_V1_3)
   #include "lpc1768/pins_BTT_SKR_V1_3.h"        // LPC1768                                env:LPC1768
 #elif MB(BTT_SKR_V1_4)
-  #include "lpc1768/pins_BTT_SKR_V1_4.h"        // LPC1768                                env:LPC1768
+  #include "lpc1768/pins_BTT_SKR_V1_4.h"        // LPC1768                                env:LPC1768_btt_skr_v1_4
 
 //
 // LPC1769 ARM Cortex M3

Marlin/src/pins/pinsDebug.h

 #define REPORT_NAME_ANALOG(COUNTER, NAME) _ADD_PIN(#NAME, COUNTER)
 
 #include "pinsDebug_list.h"
-#line 46
+#line 45
 
 // manually add pins that have names that are macros which don't play well with these macros
 #if ANY(AVR_ATmega2560_FAMILY, AVR_ATmega1284_FAMILY, ARDUINO_ARCH_SAM, TARGET_LPC1768)
   #endif
 
   #include "pinsDebug_list.h"
-  #line 172
+  #line 231
 
 };
 

Marlin/src/pins/rambo/env_validate.h

+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 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
+
+#if NOT_TARGET(__AVR_ATmega2560__)
+  #error "Oops! Select 'Arduino Mega 2560 or Rambo' in 'Tools > Board.'"
+#endif

Marlin/src/pins/rambo/pins_EINSY_RAMBO.h

  * Einsy-Rambo pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino Mega 2560 or Rambo' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Einsy Rambo"
 

Marlin/src/pins/rambo/pins_EINSY_RETRO.h

  * Einsy-Retro pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino Mega 2560 or Rambo' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Einsy Retro"
 

Marlin/src/pins/rambo/pins_MINIRAMBO.h

  * Mini-RAMBo pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'RAMBo' in 'Tools > Board' or the Mega2560 environment in PlatformIO."
-#endif
+#include "env_validate.h"
 
 #if MB(MINIRAMBO_10A)
   #define BOARD_INFO_NAME "Mini RAMBo 1.0a"

Marlin/src/pins/rambo/pins_RAMBO.h

  * Rambo pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "Rambo"

Marlin/src/pins/rambo/pins_SCOOVO_X9H.h

  * Rambo pin assignments MODIFIED FOR Scoovo X9H
  ************************************************/
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_target.h"
 
 #define BOARD_INFO_NAME "Scoovo X9H"
 

Marlin/src/pins/ramps/env_validate.h

+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 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
+
+#if ENABLED(ALLOW_SAM3X8E)
+  #if NOT_TARGET(__SAM3X8E__, __AVR_ATmega2560__)
+    #error "Oops! Select 'Arduino Due' or 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
+  #endif
+#elif ENABLED(REQUIRE_MEGA2560) && NOT_TARGET(__AVR_ATmega2560__)
+  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
+#elif DISABLED(REQUIRE_MEGA2560) && NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
+  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560 or 1280' in 'Tools > Board.'"
+#endif
+
+#undef ALLOW_SAM3X8E
+#undef REQUIRE_MEGA2560

Marlin/src/pins/ramps/pins_AZTEEG_X3.h

  * AZTEEG_X3 Arduino Mega with RAMPS v1.4 pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 2 || E_STEPPERS > 2
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
+
+#if HOTENDS > 2 || E_STEPPERS > 2
   #error "Azteeg X3 supports up to 2 hotends / E-steppers. Comment out this line to continue."
 #endif
 

Marlin/src/pins/ramps/pins_AZTEEG_X3_PRO.h

  * AZTEEG_X3_PRO (Arduino Mega) pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 5 || E_STEPPERS > 5
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
+
+#if HOTENDS > 5 || E_STEPPERS > 5
   #error "Azteeg X3 Pro supports up to 5 hotends / E-steppers. Comment out this line to continue."
 #endif
 

Marlin/src/pins/ramps/pins_BQ_ZUM_MEGA_3D.h

  * bq ZUM Mega 3D board definition
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "ZUM Mega 3D"
 

Marlin/src/pins/ramps/pins_DUPLICATOR_I3_PLUS.h

  * Wanhao Duplicator i3 Plus pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Duplicator i3 Plus"
 

Marlin/src/pins/ramps/pins_FORMBOT_RAPTOR.h

  * Formbot Raptor pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 3 || E_STEPPERS > 3
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
+
+#if HOTENDS > 3 || E_STEPPERS > 3
   #error "Formbot supports up to 3 hotends / E-steppers. Comment out this line to continue."
 #endif
 

Marlin/src/pins/ramps/pins_FORMBOT_TREX2PLUS.h

  * Formbot pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 2 || E_STEPPERS > 2
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
+
+#if HOTENDS > 2 || E_STEPPERS > 2
   #error "Formbot supports up to 2 hotends / E-steppers. Comment out this line to continue."
 #endif
 

Marlin/src/pins/ramps/pins_FORMBOT_TREX3.h

  * Formbot pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 2 || E_STEPPERS > 2
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
+
+#if HOTENDS > 2 || E_STEPPERS > 2
   #error "Formbot supports up to 2 hotends / E-steppers. Comment out this line to continue."
 #endif
 

Marlin/src/pins/ramps/pins_K8800.h

  * Velleman K8800 (Vertex)
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME      "K8800"
 #define DEFAULT_MACHINE_NAME "Vertex Delta"

Marlin/src/pins/ramps/pins_LONGER3D_LKx_PRO.h

  * Longer3D LK1/LK4/LK5 Pro board pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 1 || E_STEPPERS > 1
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
+
+#if HOTENDS > 1 || E_STEPPERS > 1
   #error "Longer3D LGT KIT V1.0 board only supports one hotend / E-stepper. Comment out this line to continue."
 #endif
 
   #warning "Serial 3 is originally reserved to Y limit switches. Hardware changes are required to use it."
 #endif
 
-// Custom flags and defines for the build
-//#define BOARD_CUSTOM_BUILD_FLAGS -D__FOO__
-
 #define BOARD_INFO_NAME "LGT KIT V1.0"
 
 //

Marlin/src/pins/ramps/pins_RAMPS.h

  *         7 | 11
  */
 
-#ifdef TARGET_LPC1768
-  #error "Oops! Set MOTHERBOARD to an LPC1768-based board when building for LPC1768."
-#elif defined(__STM32F1__)
-  #error "Oops! Set MOTHERBOARD to an STM32F1-based board when building for STM32F1."
-#endif
-
-#if NOT_TARGET(IS_RAMPS_SMART, IS_RAMPS_DUO, IS_RAMPS4DUE, TARGET_LPC1768, __AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' (or other appropriate target) in 'Tools > Board.'"
-#endif
-
-// Custom flags and defines for the build
-//#define BOARD_CUSTOM_BUILD_FLAGS -D__FOO__
+#include "env_validate.h"
 
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "RAMPS 1.4"

Marlin/src/pins/ramps/pins_RAMPS_OLD.h

  * Arduino Mega with RAMPS v1.0, v1.1, v1.2 pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "RAMPS <1.2"
 

Marlin/src/pins/ramps/pins_RAMPS_PLUS.h

  *  RAMPS_PLUS_SF  (Spindle, Controller Fan)
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
- #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "RAMPS 1.4 Plus"
 

Marlin/src/pins/ramps/pins_RAMPS_S_12.h

  * Other pins_MYBOARD.h files may override these defaults
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
-
-// Custom flags and defines for the build
-//#define BOARD_CUSTOM_BUILD_FLAGS -D__FOO__
+#include "env_validate.h"
 
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "RAMPS S 1.2"

Marlin/src/pins/ramps/pins_RUMBA.h

  * RUMBA pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 3 || E_STEPPERS > 3
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
+
+#if HOTENDS > 3 || E_STEPPERS > 3
   #error "RUMBA supports up to 3 hotends / E-steppers. Comment out this line to continue."
 #endif
 

Marlin/src/pins/ramps/pins_TENLOG_D3_HERO.h

  * Tenlog pin assignments
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 2 || E_STEPPERS > 2
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
+
+#if HOTENDS > 2 || E_STEPPERS > 2
   #error "Tenlog supports up to 2 hotends / E-steppers. Comment out this line to continue."
 #endif
 

Marlin/src/pins/ramps/pins_TRONXY_V3_1_0.h

  * Arduino Mega for Tronxy X5S-2E, etc.
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 2 || E_STEPPERS > 2
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
+
+#if HOTENDS > 2 || E_STEPPERS > 2
   #error "TRONXY-V3-1.0 supports only 2 hotends/E-steppers. Comment out this line to continue."
 #endif
 

Marlin/src/pins/ramps/pins_TT_OSCAR.h

  *
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #if HOTENDS > 5 || E_STEPPERS > 5
   #error "TTOSCAR supports up to 5 hotends / E-steppers. Comment out this line to continue."

Marlin/src/pins/ramps/pins_ULTIMAIN_2.h

  *    case light
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME         "Ultimaker 2.x"
 #define DEFAULT_MACHINE_NAME    "Ultimaker"

Marlin/src/pins/ramps/pins_ULTIMAKER.h

  *    case light
  */
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME         "Ultimaker"
 #define DEFAULT_MACHINE_NAME    BOARD_INFO_NAME

Marlin/src/pins/ramps/pins_ULTIMAKER_OLD.h

 //#define BOARD_REV_1_0
 //#define BOARD_REV_1_5
 
-#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #ifdef BOARD_REV_1_1_TO_1_3
   #define BOARD_INFO_NAME       "Ultimaker 1.1-1.3"

Marlin/src/pins/ramps/pins_Z_BOLT_X_SERIES.h

  *  Z-Bolt X Series board – based on Arduino Mega2560
  */
 
-#if NOT_TARGET(__AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#elif HOTENDS > 4 || E_STEPPERS > 4
+#define REQUIRE_MEGA2560
+#include "env_validate.h"
+
+#if HOTENDS > 4 || E_STEPPERS > 4
   #error "Z-Bolt X Series board supports up to 4 hotends / E-steppers."
 #endif
 

Marlin/src/pins/sam/env_validate.h

+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 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
+
+#if BOTH(ALLOW_MEGA1280, ALLOW_MEGA2560) && NOT_TARGET(__SAM3X8E__, __AVR_ATmega1280__, __AVR_ATmega2560__)
+  #error "Oops! Select 'Arduino Due or Mega' in 'Tools > Board.'"
+#elif ENABLED(ALLOW_MEGA2560) && NOT_TARGET(__SAM3X8E__, __AVR_ATmega2560__)
+  #error "Oops! Select 'Arduino Due or Mega' in 'Tools > Board.'"
+#elif ENABLED(ALLOW_MEGA1280) && NOT_TARGET(__SAM3X8E__, __AVR_ATmega1280__)
+  #error "Oops! Select 'Arduino Due' in 'Tools > Board.'"
+#endif
+
+#undef ALLOW_MEGA1280
+#undef ALLOW_MEGA2560

Marlin/src/pins/sam/pins_ADSK.h

 
 #define BOARD_INFO_NAME "ADSK"
 
-#if NOT_TARGET(__SAM3X8E__, __AVR_ATmega1280__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino Due or Mega' in 'Tools > Board.'"
-#endif
+#define ALLOW_MEGA1280
+#define ALLOW_MEGA2560
+#include "env_validate.h"
 
 /* CNC shield modifications:
 FROM THE BOTTOM CUT THE 5V PIN THAT GOES TO ARDUINO!!!

Marlin/src/pins/sam/pins_ALLIGATOR_R2.h

  * https://reprap.org/wiki/Alligator_Board
  */
 
-#if NOT_TARGET(__SAM3X8E__)
-  #error "Oops! Select 'Arduino Due' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME    "Alligator Board R2"
 

Marlin/src/pins/sam/pins_CNCONTROLS_15D.h

  * CNControls V15 for HMS434 with DUE pin assignments
  */
 
-#if NOT_TARGET(__SAM3X8E__)
-  #error "Oops! Select 'Arduino Due' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "CN Controls V15D"
 

Marlin/src/pins/sam/pins_DUE3DOM.h

  * DUE3DOM pin assignments
  */
 
-#if NOT_TARGET(__SAM3X8E__)
-  #error "Oops! Select 'Arduino Due' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "DUE3DOM"
 

Marlin/src/pins/sam/pins_DUE3DOM_MINI.h

  * DUE3DOM MINI pin assignments
  */
 
-#if NOT_TARGET(__SAM3X8E__)
-  #error "Oops! Select 'Arduino Due' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "DUE3DOM MINI"
 

Marlin/src/pins/sam/pins_PRINTRBOARD_G2.h

  * PRINTRBOARD_G2
  */
 
-#if NOT_TARGET(__SAM3X8E__)
-  #error "Oops! Select 'Arduino Due' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "Printrboard G2"

Marlin/src/pins/sam/pins_RADDS.h

  * RADDS
  */
 
-#if NOT_TARGET(__SAM3X8E__)
-  #error "Oops! Select 'Arduino Due' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "RADDS"
 

Marlin/src/pins/sam/pins_RAMPS4DUE.h

  *       A15 | NC
  */
 
-#if NOT_TARGET(__SAM3X8E__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino Due' or 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
-
+#define ALLOW_SAM3X8E
 #define BOARD_INFO_NAME "RAMPS4DUE"
 
-#define IS_RAMPS4DUE
-
 //
 // Temperature Sensors
 //

Marlin/src/pins/sam/pins_RAMPS_DUO.h

  *       A15 | A11
  */
 
-#if NOT_TARGET(__SAM3X8E__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino Due' or 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
-#endif
-
 #define BOARD_INFO_NAME "RAMPS Duo"
 
-#define IS_RAMPS_DUO
-
+#define ALLOW_SAM3X8E
 #include "../ramps/pins_RAMPS.h"
 
 //

Marlin/src/pins/sam/pins_RAMPS_FD_V1.h

  * Use 4k7 thermistor tables
  */
 
-#if NOT_TARGET(__SAM3X8E__)
-  #error "Oops! Select 'Arduino Due' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #ifndef BOARD_INFO_NAME
   #define BOARD_INFO_NAME "RAMPS-FD v1"

Marlin/src/pins/sam/pins_RAMPS_SMART.h

  * (Search the web for "Arduino DUE Board Pinout" to see the correct header.)
  */
 
-#if NOT_TARGET(__SAM3X8E__, __AVR_ATmega2560__)
-  #error "Oops! Select 'Arduino Due' or 'Mega 2560' in 'Tools > Board.'"
-#endif
-
 #define BOARD_INFO_NAME "RAMPS-SMART"
-#define IS_RAMPS_SMART
+#define ALLOW_SAM3X8E
 #include "../ramps/pins_RAMPS.h"
 
 // I2C EEPROM with 4K of space

Marlin/src/pins/sam/pins_RURAMPS4D_11.h

  *           |
  */
 
-#if NOT_TARGET(__SAM3X8E__)
-  #error "Oops! Select 'Arduino Due' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "RuRAMPS4Due v1.1"
 

Marlin/src/pins/sam/pins_RURAMPS4D_13.h

  *           |
  */
 
-#if NOT_TARGET(__SAM3X8E__)
-  #error "Oops! Select 'Arduino Due' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "RuRAMPS4Due v1.3"
 

Marlin/src/pins/sam/pins_ULTRATRONICS_PRO.h

  * https://reprapworld.com/documentation/datasheet_ultratronics10_05.pdf
  */
 
-#if NOT_TARGET(ARDUINO_ARCH_SAM)
-  #error "Oops! Select 'Arduino Due' in 'Tools > Board.'"
-#endif
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Ultratronics v1.0"
 

Marlin/src/pins/sanguino/env_validate.h

+  /**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 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
+
+#if ENABLED(ALLOW_MEGA644)
+  #if NOT_TARGET(__AVR_ATmega644__, __AVR_ATmega644P__, __AVR_ATmega1284P__)
+    #error "Oops! Select 'Sanguino' in 'Tools > Boards' and 'ATmega644', 'ATmega644P', or 'ATmega1284P' in 'Tools > Processor.'"
+  #endif
+#elif ENABLED(ALLOW_MEGA644P)
+  #if NOT_TARGET(__AVR_ATmega644P__, __AVR_ATmega1284P__)
+    #error "Oops! Select 'Sanguino' in 'Tools > Boards' and 'ATmega644P' or 'ATmega1284P' in 'Tools > Processor.'"
+  #endif
+#elif ENABLED(REQUIRE_MEGA644P)
+  #if NOT_TARGET(__AVR_ATmega644P__)
+    #error "Oops! Select 'Sanguino' in 'Tools > Board' and 'ATmega644P' in 'Tools > Processor.'"
+  #endif
+#elif NOT_TARGET(__AVR_ATmega1284P__)
+  #error "Oops! Select 'Sanguino' in 'Tools > Board' and 'ATmega1284P' in 'Tools > Processor.' (For PlatformIO, use 'melzi' or 'melzi_optiboot.')"
+#endif
+
+#undef ALLOW_MEGA644
+#undef ALLOW_MEGA644P
+#undef REQUIRE_MEGA644P

Marlin/src/pins/sanguino/pins_GEN3_MONOLITHIC.h

  * Once installed select the Sanguino board and then select the CPU.
  */
 
-#if NOT_TARGET(__AVR_ATmega644P__)
-  #error "Oops! Select 'Sanguino' in 'Tools > Board.'"
-#endif
+#define REQUIRE_MEGA644P
+#include "env_validate.h"
 
 #define BOARD_INFO_NAME "Gen3 Monolithic"
 #define DEBUG_PIN                              0