Get E2END from pins, fix Linux buffer

Marlin/src/HAL/HAL_DUE/persistent_store_eeprom.cpp

 #include "../../inc/MarlinConfig.h"
 #include "../shared/persistent_store_api.h"
 
-#if NONE(I2C_EEPROM, SPI_EEPROM)
+#if !defined(E2END) && NONE(I2C_EEPROM, SPI_EEPROM)
   #define E2END 0xFFF // Default to Flash emulated EEPROM size (EepromEmulation_Due.cpp)
 #endif
 

Marlin/src/HAL/HAL_LINUX/include/Arduino.h

 #define FALLING      0x03
 #define RISING       0x04
 
-#define E2END 0xFFF // EEPROM end address
-
 typedef uint8_t byte;
 #define PROGMEM
 #define PSTR(v) (v)

Marlin/src/HAL/HAL_LINUX/persistent_store_impl.cpp

 #include "../shared/persistent_store_api.h"
 #include <stdio.h>
 
-uint8_t buffer[E2END];
+#define LINUX_EEPROM_SIZE (E2END + 1)
+uint8_t buffer[LINUX_EEPROM_SIZE];
 char filename[] = "eeprom.dat";
 
 bool PersistentStore::access_start() {
   fseek(eeprom_file, 0L, SEEK_END);
   std::size_t file_size = ftell(eeprom_file);
 
-  if (file_size < E2END) {
-    memset(buffer + file_size, eeprom_erase_value, E2END - file_size);
+  if (file_size < LINUX_EEPROM_SIZE) {
+    memset(buffer + file_size, eeprom_erase_value, LINUX_EEPROM_SIZE - file_size);
   }
   else {
     fseek(eeprom_file, 0L, SEEK_SET);

Marlin/src/HAL/HAL_STM32F1/persistent_store_sdcard.cpp

 #include "../shared/persistent_store_api.h"
 
 #ifndef E2END
-  #define E2END 4095
+  #define E2END 0xFFF // 4KB
 #endif
 #define HAL_STM32F1_EEPROM_SIZE (E2END + 1)
 

Marlin/src/HAL/HAL_STM32F4/EEPROM_Emul/eeprom_emul.h

 
 /* Pages 0 and 1 base and end addresses */
 #define PAGE0_BASE_ADDRESS    ((uint32_t)(EEPROM_START_ADDRESS + 0x0000))
-#define PAGE0_END_ADDRESS     ((uint32_t)(EEPROM_START_ADDRESS + (PAGE_SIZE - 1)))
+#define PAGE0_END_ADDRESS     ((uint32_t)(EEPROM_START_ADDRESS + PAGE_SIZE - 1))
 #define PAGE0_ID               FLASH_SECTOR_1
 
 #define PAGE1_BASE_ADDRESS    ((uint32_t)(EEPROM_START_ADDRESS + 0x4000))
-#define PAGE1_END_ADDRESS     ((uint32_t)(EEPROM_START_ADDRESS + (2 * PAGE_SIZE - 1)))
+#define PAGE1_END_ADDRESS     ((uint32_t)(EEPROM_START_ADDRESS + 2 * (PAGE_SIZE) - 1))
 #define PAGE1_ID               FLASH_SECTOR_2
 
 /* Used Flash pages for EEPROM emulation */

Marlin/src/pins/pins_ARMED.h

 
 #define I2C_EEPROM
 
-#undef E2END
-#define E2END 0xFFF // EEPROM end address (4kB)
+#define E2END 0xFFF // 4KB
 
 #if HOTENDS > 2 || E_STEPPERS > 2
   #error "Arm'ed supports up to 2 hotends / E-steppers."

Marlin/src/pins/pins_BLACK_STM32F407VE.h

 #define DEFAULT_MACHINE_NAME "STM32F407VET6"
 
 //#define I2C_EEPROM
-//#define E2END 0x1FFF // EEPROM end address (8kB)
+//#define E2END 0x1FFF // 8KB
 #define SRAM_EEPROM_EMULATION
 
 #if HOTENDS > 2 || E_STEPPERS > 2

Marlin/src/pins/pins_GTM32_PRO_VB.h

 
 // Enable EEPROM Emulation for this board as it doesn't have EEPROM
 #define FLASH_EEPROM_EMULATION
-#define E2END 0xFFF // EEPROM end address (4kB)
+#define E2END 0xFFF // 4KB
 
 //
 // Limit Switches
 #endif
 
 #define SDSS               SS_PIN
- 
+
 //
 // ESP WiFi can be soldered to J9 connector which is wired to USART2.
 // Must define WIFISUPPORT in Configuration.h for the printer.

Marlin/src/pins/pins_JGAURORA_A5S_A1.h

 
 //#define MCU_STM32F103ZE // not yet required
 
-// // I2C EEPROM with 64K of space - AT24C64
-// #define I2C_EEPROM
-// #define E2END 0x7FFF
+// #define I2C_EEPROM   // AT24C64
+// #define E2END 0x7FFF // 64KB
 
 // Enable EEPROM Emulation for this board
 
 //#define FLASH_EEPROM_EMULATION 1
-//#define E2END  0xFFF //((uint32)(EEPROM_START_ADDRESS + EEPROM_PAGE_SIZE + EEPROM_PAGE_SIZE)) // not 0xFFF
+//#define E2END 0xFFF // 4KB
+//#define E2END uint32(EEPROM_START_ADDRESS + (EEPROM_PAGE_SIZE * 2) - 1)
 //#define EEPROM_CHITCHAT
 //#define DEBUG_EEPROM_READWRITE
 

Marlin/src/pins/pins_RADDS.h

   #define FIL_RUNOUT_PIN   39   // SERVO2_PIN
 #endif
 
-// I2C EEPROM with 8K of space
 #define I2C_EEPROM
-#define E2END 0x1FFF
+#define E2END 0x1FFF // 8KB
 
 //
 // LCD / Controller

Marlin/src/pins/pins_RAMPS_LINUX.h

   #define BOARD_NAME "RAMPS 1.4"
 #endif
 
+#define E2END 0xFFF // 4KB
+
 #define IS_RAMPS_EFB
 
 //

Marlin/src/pins/pins_RUMBA32.h

 #define DEFAULT_MACHINE_NAME BOARD_NAME
 
 //#define I2C_EEPROM
-
-#define E2END 0xFFF // EEPROM end address (4kB)
+#define E2END 0xFFF // 4KB
 
 #if HOTENDS > 3 || E_STEPPERS > 3
   #error "RUMBA32 supports up to 3 hotends / E-steppers."

Marlin/src/pins/pins_STM32F4.h

 
 //#define I2C_EEPROM
 
-#define E2END 0xFFF // EEPROM end address (4kB)
+#define E2END 0xFFF // 4KB
 
 // Ignore temp readings during develpment.
 //#define BOGUS_TEMPERATURE_FAILSAFE_OVERRIDE