Add SD Firmware Update capability (#12043)

Co-Authored-By: timoxd7 <timoxd7@users.noreply.github.com>

Marlin/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/default/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/AlephObjects/TAZ4/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Anet/A2/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Anet/A2plus/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Anet/A6/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Anet/A8/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/BIBO/TouchX/cyclops/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/BIBO/TouchX/default/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/BQ/Hephestos/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/BQ/Hephestos_2/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/BQ/WITBOX/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Cartesio/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Creality/CR-10/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Creality/CR-10S/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Creality/CR-10mini/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Creality/CR-8/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Creality/Ender-2/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Creality/Ender-3/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Creality/Ender-4/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Einstart-S/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Felix/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/FolgerTech/i3-2020/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Formbot/Raptor/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Formbot/T_Rex_2+/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Formbot/T_Rex_3/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Geeetech/MeCreator2/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Geeetech/Prusa i3 Pro C/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Geeetech/Prusa i3 Pro W/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Infitary/i3-M508/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/JGAurora/A5/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/MakerParts/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Malyan/M150/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Malyan/M200/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Micromake/C1/enhanced/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Mks/Sbase/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/RigidBot/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/SCARA/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Sanguinololu/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/TheBorg/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/TinyBoy2/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Tronxy/X3A/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/UltiMachine/Archim2/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Velleman/K8200/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Velleman/K8400/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/Wanhao/Duplicator 6/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/delta/Anycubic/Kossel/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/delta/FLSUN/auto_calibrate/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/delta/FLSUN/kossel/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/delta/FLSUN/kossel_mini/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/delta/generic/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/delta/kossel_mini/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/delta/kossel_xl/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/gCreate/gMax1.5+/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/makibox/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/tvrrug/Round2/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/config/examples/wt150/Configuration_adv.h

     #define USB_INTR_PIN       SD_DETECT_PIN
   #endif
 
+  /**
+   * When using a bootloader that supports SD-Firmware-Flashing,
+   * add a menu item to activate SD-FW-Update on the next reboot.
+   * 
+   * Requires ATMEGA2560 (Arduino Mega)
+   * 
+   * Tested with this bootloader:
+   *   https://github.com/FleetProbe/MicroBridge-Arduino-ATMega2560
+   */
+  //#define SD_FIRMWARE_UPDATE
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    #define SD_FIRMWARE_UPDATE_EEPROM_ADDR    0x1FF
+    #define SD_FIRMWARE_UPDATE_ACTIVE_VALUE   0xF0
+    #define SD_FIRMWARE_UPDATE_INACTIVE_VALUE 0xFF
+  #endif
+
 #endif // SDSUPPORT
 
 /**

Marlin/src/inc/SanityCheck.h

   #error "USB_CS_PIN and USB_INTR_PIN are required for USB_FLASH_DRIVE_SUPPORT."
 #endif
 
+#if ENABLED(SD_FIRMWARE_UPDATE) && !defined(__AVR_ATmega2560__)
+  #error "SD_FIRMWARE_UPDATE requires an ATmega2560-based (Arduino Mega) board."
+#endif
+
 #endif // _SANITYCHECK_H_

Marlin/src/lcd/language/language_de.h

 #define MSG_LOAD_EEPROM                     _UxGT("Konfig. laden")
 #define MSG_RESTORE_FAILSAFE                _UxGT("Standardwerte laden")
 #define MSG_INIT_EEPROM                     _UxGT("Werkseinstellungen")
+#define MSG_SD_UPDATE                       _UxGT("SD Update")
+#define MSG_RESET_PRINTER                   _UxGT("Drucker neustarten")
 #define MSG_REFRESH                         _UxGT("Aktualisieren")
 #define MSG_WATCH                           _UxGT("Info")
 #define MSG_PREPARE                         _UxGT("Vorbereitung")

Marlin/src/lcd/language/language_en.h

 #ifndef MSG_INIT_EEPROM
   #define MSG_INIT_EEPROM                     _UxGT("Initialize EEPROM")
 #endif
+#ifndef MSG_SD_UPDATE
+  #define MSG_SD_UPDATE                       _UxGT("SD Update")
+#endif
+#ifndef MSG_RESET_PRINTER
+  #define MSG_RESET_PRINTER                   _UxGT("Reset Printer")
+#endif
 #ifndef MSG_REFRESH
   #define MSG_REFRESH                         _UxGT("Refresh")
 #endif

Marlin/src/lcd/ultralcd.cpp

     }
   #endif
 
+  #if ENABLED(SD_FIRMWARE_UPDATE)
+    /**
+     * Toggle the SD Firmware Update state in EEPROM
+     */
+    static void _lcd_toggle_sd_update() {
+      const bool new_state = !settings.sd_update_status();
+      lcd_completion_feedback(settings.set_sd_update_status(new_state));
+      lcd_return_to_status();
+      if (new_state) LCD_MESSAGEPGM(MSG_RESET_PRINTER); else lcd_reset_status();
+    }
+  #endif
+
   void lcd_advanced_settings_menu() {
     START_MENU();
     MENU_BACK(MSG_CONFIGURATION);
         MENU_ITEM(gcode, MSG_BLTOUCH_RESET, PSTR("M280 P" STRINGIFY(Z_PROBE_SERVO_NR) " S" STRINGIFY(BLTOUCH_RESET)));
     #endif
 
+    #if ENABLED(SD_FIRMWARE_UPDATE)
+      bool sd_update_state = settings.sd_update_status();
+      MENU_ITEM_EDIT_CALLBACK(bool, MSG_SD_UPDATE, &sd_update_state, _lcd_toggle_sd_update);
+    #endif
+
     #if ENABLED(EEPROM_SETTINGS) && DISABLED(SLIM_LCD_MENUS)
       MENU_ITEM(submenu, MSG_INIT_EEPROM, lcd_init_eeprom_confirm);
     #endif

Marlin/src/module/configuration_store.cpp

     report_current_position();
 }
 
+#if ENABLED(SD_FIRMWARE_UPDATE)
+
+  #if ENABLED(EEPROM_SETTINGS)
+    static_assert(
+      !WITHIN(SD_FIRMWARE_UPDATE_EEPROM_ADDR, EEPROM_OFFSET, EEPROM_OFFSET + sizeof(SettingsData)),
+      "SD_FIRMWARE_UPDATE_EEPROM_ADDR collides with EEPROM settings storage."
+    );
+  #endif
+
+  bool MarlinSettings::sd_update_status() {
+    uint8_t val;
+    persistentStore.read_data(SD_FIRMWARE_UPDATE_EEPROM_ADDR, &val);
+    return (val == SD_FIRMWARE_UPDATE_ACTIVE_VALUE);
+  }
+
+  bool MarlinSettings::set_sd_update_status(const bool enable) {
+    if (enable != sd_update_status())
+      persistentStore.write_data(
+        SD_FIRMWARE_UPDATE_EEPROM_ADDR,
+        enable ? SD_FIRMWARE_UPDATE_ACTIVE_VALUE : SD_FIRMWARE_UPDATE_INACTIVE_VALUE
+      );
+    return true;
+  }
+
+#endif // SD_FIRMWARE_UPDATE
+
 #if ENABLED(EEPROM_SETTINGS)
   #include "../HAL/shared/persistent_store_api.h"
 

Marlin/src/module/configuration_store.h

       #endif
     }
 
+    #if ENABLED(SD_FIRMWARE_UPDATE)
+      static bool sd_update_status();                       // True if the SD-Firmware-Update EEPROM flag is set
+      static bool set_sd_update_status(const bool enable);  // Return 'true' after EEPROM is set (-> always true)
+    #endif
+
     #if ENABLED(EEPROM_SETTINGS)
       static bool load(PORTINIT_SOLO);      // Return 'true' if data was loaded ok
       static bool validate(PORTINIT_SOLO);  // Return 'true' if EEPROM data is ok

buildroot/share/tests/megaatmega2560_tests

            BLINKM PCA9632 RGB_LED NEOPIXEL_LED AUTO_POWER_CONTROL NOZZLE_PARK_FEATURE FILAMENT_RUNOUT_SENSOR \
            AUTO_BED_LEVELING_LINEAR Z_MIN_PROBE_REPEATABILITY_TEST DEBUG_LEVELING_FEATURE \
            SKEW_CORRECTION SKEW_CORRECTION_FOR_Z SKEW_CORRECTION_GCODE
-opt_enable_adv ARC_P_CIRCLES ADVANCED_PAUSE_FEATURE CNC_WORKSPACE_PLANES CNC_COORDINATE_SYSTEMS \
+opt_enable_adv FWRETRACT ARC_P_CIRCLES ADVANCED_PAUSE_FEATURE CNC_WORKSPACE_PLANES CNC_COORDINATE_SYSTEMS \
                POWER_LOSS_RECOVERY POWER_LOSS_PIN POWER_LOSS_STATE \
-               FWRETRACT MAX7219_DEBUG LED_CONTROL_MENU CASE_LIGHT_ENABLE CASE_LIGHT_USE_NEOPIXEL CODEPENDENT_XY_HOMING
+               MAX7219_DEBUG LED_CONTROL_MENU CASE_LIGHT_ENABLE CASE_LIGHT_USE_NEOPIXEL CODEPENDENT_XY_HOMING
 opt_set_adv FANMUX0_PIN 53
 exec_test $1 $2 "RAMPS with 2 extruders, RRDFGSC, Linear ABL, LEDs, and many options"