Refine EEPROM types / flags (#17772)

2020-04-29 14:46:33 -05:00 · 2020-04-29 14:46:33 -05:00 · 5e6faa999d
commit 5e6faa999d
parent 2d758663db
58 changed files with 365 additions and 256 deletions
--- a/Marlin/src/HAL/AVR/eeprom.cpp
+++ b/Marlin/src/HAL/AVR/eeprom.cpp
@ -27,6 +27,7 @@

 #include "../shared/eeprom_api.h"

+size_t PersistentStore::capacity()    { return E2END + 1; }
 bool PersistentStore::access_start()  { return true; }
 bool PersistentStore::access_finish() { return true; }

@ -61,7 +62,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
  return false;  // always assume success for AVR's
 }

-size_t PersistentStore::capacity() { return E2END + 1; }
-
 #endif // EEPROM_SETTINGS || SD_FIRMWARE_UPDATE
 #endif // __AVR__
--- a/Marlin/src/HAL/DUE/HAL.h
+++ b/Marlin/src/HAL/DUE/HAL.h
@ -30,6 +30,7 @@
 #define CPU_32_BIT

 #include "../shared/Marduino.h"
+#include "../shared/eeprom_if.h"
 #include "../shared/math_32bit.h"
 #include "../shared/HAL_SPI.h"
 #include "fastio.h"
@ -130,14 +131,6 @@ void sei();                     // Enable interrupts
 void HAL_clear_reset_source();  // clear reset reason
 uint8_t HAL_get_reset_source(); // get reset reason

-//
-// EEPROM
-//
-void eeprom_write_byte(uint8_t *pos, unsigned char value);
-uint8_t eeprom_read_byte(uint8_t *pos);
-void eeprom_read_block (void *__dst, const void *__src, size_t __n);
-void eeprom_update_block (const void *__src, void *__dst, size_t __n);
-
 //
 // ADC
 //
--- a/Marlin/src/HAL/DUE/eeprom_flash.cpp
+++ b/Marlin/src/HAL/DUE/eeprom_flash.cpp
@ -22,25 +22,26 @@
 */
 #ifdef ARDUINO_ARCH_SAM

-#include "../../inc/MarlinConfigPre.h"
+#include "../../inc/MarlinConfig.h"

-#if ENABLED(EEPROM_SETTINGS)
+#if ENABLED(FLASH_EEPROM_EMULATION)

 #include "../../inc/MarlinConfig.h"
+
+#include "../shared/eeprom_if.h"
 #include "../shared/eeprom_api.h"

-#if !defined(E2END) && ENABLED(FLASH_EEPROM_EMULATION)
+#if !defined(E2END)
  #define E2END 0xFFF // Default to Flash emulated EEPROM size (EepromEmulation_Due.cpp)
 #endif

 extern void eeprom_flush();

+size_t PersistentStore::capacity()    { return E2END + 1; }
 bool PersistentStore::access_start()  { return true; }

 bool PersistentStore::access_finish() {
-  #if ENABLED(FLASH_EEPROM_EMULATION)
  eeprom_flush();
-  #endif
  return true;
 }

@ -76,7 +77,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
  return false;
 }

-size_t PersistentStore::capacity() { return E2END + 1; }
-
 #endif // EEPROM_SETTINGS
 #endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/DUE/eeprom_if_flash.cpp
+++ b/Marlin/src/HAL/DUE/eeprom_if_flash.cpp
@ -57,6 +57,7 @@
 #if ENABLED(FLASH_EEPROM_EMULATION)

 #include "../shared/Marduino.h"
+#include "../shared/eeprom_if.h"
 #include "../shared/eeprom_api.h"

 #define EEPROMSize     4096
--- a/Marlin/src/HAL/DUE/eeprom_wired.cpp
+++ b/Marlin/src/HAL/DUE/eeprom_wired.cpp
@ -0,0 +1,69 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ * Copyright (c) 2016 Victor Perez victor_pv@hotmail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#ifdef ARDUINO_ARCH_SAM
+
+#include "../../inc/MarlinConfig.h"
+
+#if USE_WIRED_EEPROM
+
+#include "../shared/eeprom_if.h"
+#include "../shared/eeprom_api.h"
+
+size_t PersistentStore::capacity()    { return E2END + 1; }
+bool PersistentStore::access_start()  { return true; }
+bool PersistentStore::access_finish() { return true; }
+
+bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
+  while (size--) {
+    uint8_t * const p = (uint8_t * const)pos;
+    uint8_t v = *value;
+    // EEPROM has only ~100,000 write cycles,
+    // so only write bytes that have changed!
+    if (v != eeprom_read_byte(p)) {
+      eeprom_write_byte(p, v);
+      delay(2);
+      if (eeprom_read_byte(p) != v) {
+        SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
+        return true;
+      }
+    }
+    crc16(crc, &v, 1);
+    pos++;
+    value++;
+  };
+  return false;
+}
+
+bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
+  do {
+    uint8_t c = eeprom_read_byte((uint8_t*)pos);
+    if (writing) *value = c;
+    crc16(crc, &c, 1);
+    pos++;
+    value++;
+  } while (--size);
+  return false;
+}
+
+#endif // USE_WIRED_EEPROM
+#endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/DUE/inc/Conditionals_post.h
+++ b/Marlin/src/HAL/DUE/inc/Conditionals_post.h
@ -22,7 +22,7 @@
 #pragma once

 #if USE_FALLBACK_EEPROM
-  #undef SRAM_EEPROM_EMULATION
-  #undef SDCARD_EEPROM_EMULATION
  #define FLASH_EEPROM_EMULATION
+#elif EITHER(I2C_EEPROM, SPI_EEPROM)
+  #define USE_SHARED_EEPROM 1
 #endif
--- a/Marlin/src/HAL/ESP32/HAL.h
+++ b/Marlin/src/HAL/ESP32/HAL.h
@ -109,12 +109,6 @@ int freeMemory();

 void analogWrite(pin_t pin, int value);

-// EEPROM
-void eeprom_write_byte(uint8_t *pos, unsigned char value);
-uint8_t eeprom_read_byte(uint8_t *pos);
-void eeprom_read_block (void *__dst, const void *__src, size_t __n);
-void eeprom_update_block (const void *__src, void *__dst, size_t __n);
-
 // ADC
 #define HAL_ANALOG_SELECT(pin)

--- a/Marlin/src/HAL/ESP32/eeprom.cpp
+++ b/Marlin/src/HAL/ESP32/eeprom.cpp
@ -23,7 +23,7 @@

 #include "../../inc/MarlinConfig.h"

-#if USE_WIRED_EEPROM
+#if ENABLED(EEPROM_SETTINGS)

 #include "../shared/eeprom_api.h"
 #include <EEPROM.h>
@ -58,5 +58,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t

 size_t PersistentStore::capacity() { return EEPROM_SIZE; }

-#endif // USE_WIRED_EEPROM
+#endif // EEPROM_SETTINGS
 #endif // ARDUINO_ARCH_ESP32
--- a/Marlin/src/HAL/ESP32/inc/Conditionals_post.h
+++ b/Marlin/src/HAL/ESP32/inc/Conditionals_post.h
@ -20,8 +20,3 @@
 *
 */
 #pragma once
-
-#undef USE_WIRED_EEPROM
-#if ENABLED(EEPROM_SETTINGS) && DISABLED(FLASH_EEPROM_EMULATION)
-  #define USE_WIRED_EEPROM 1
-#endif
--- a/Marlin/src/HAL/LINUX/arduino.cpp
+++ b/Marlin/src/HAL/LINUX/arduino.cpp
@ -75,20 +75,6 @@ uint16_t analogRead(pin_t adc_pin) {
  return Gpio::get(DIGITAL_PIN_TO_ANALOG_PIN(adc_pin));
 }

-// **************************
-// Persistent Config Storage
-// **************************
-
-void eeprom_write_byte(unsigned char *pos, unsigned char value) {
-
-}
-
-unsigned char eeprom_read_byte(uint8_t * pos) { return '\0'; }
-
-void eeprom_read_block(void *__dst, const void *__src, size_t __n) { }
-
-void eeprom_update_block(const void *__src, void *__dst, size_t __n) { }
-
 char *dtostrf(double __val, signed char __width, unsigned char __prec, char *__s) {
  char format_string[20];
  snprintf(format_string, 20, "%%%d.%df", __width, __prec);
--- a/Marlin/src/HAL/LINUX/include/Arduino.h
+++ b/Marlin/src/HAL/LINUX/include/Arduino.h
@ -106,12 +106,6 @@ bool digitalRead(pin_t);
 void analogWrite(pin_t, int);
 uint16_t analogRead(pin_t);

-// EEPROM
-void eeprom_write_byte(unsigned char *pos, unsigned char value);
-unsigned char eeprom_read_byte(unsigned char *pos);
-void eeprom_read_block(void *__dst, const void *__src, size_t __n);
-void eeprom_update_block(const void *__src, void *__dst, size_t __n);
-
 int32_t random(int32_t);
 int32_t random(int32_t, int32_t);
 void randomSeed(uint32_t);
--- a/Marlin/src/HAL/LPC1768/eeprom_flash.cpp
+++ b/Marlin/src/HAL/LPC1768/eeprom_flash.cpp
@ -58,6 +58,8 @@ static uint8_t ram_eeprom[EEPROM_SIZE] __attribute__((aligned(4))) = {0};
 static bool eeprom_dirty = false;
 static int current_slot = 0;

+size_t PersistentStore::capacity() { return EEPROM_SIZE; }
+
 bool PersistentStore::access_start() {
  uint32_t first_nblank_loc, first_nblank_val;
  IAP_STATUS_CODE status;
@ -122,7 +124,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
  return false;  // return true for any error
 }

-size_t PersistentStore::capacity() { return EEPROM_SIZE; }
-
 #endif // FLASH_EEPROM_EMULATION
 #endif // TARGET_LPC1768
--- a/Marlin/src/HAL/LPC1768/eeprom_sdcard.cpp
+++ b/Marlin/src/HAL/LPC1768/eeprom_sdcard.cpp
@ -38,6 +38,8 @@ FATFS fat_fs;
 FIL eeprom_file;
 bool eeprom_file_open = false;

+size_t PersistentStore::capacity() { return 4096; } // 4KiB of Emulated EEPROM
+
 bool PersistentStore::access_start() {
  const char eeprom_erase_value = 0xFF;
  MSC_Aquire_Lock();
@ -168,7 +170,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, const size_t size, uin
  return bytes_read != size;  // return true for any error
 }

-size_t PersistentStore::capacity() { return 4096; } // 4KiB of Emulated EEPROM
-
 #endif // SDCARD_EEPROM_EMULATION
 #endif // TARGET_LPC1768
--- a/Marlin/src/HAL/LPC1768/eeprom_wired.cpp
+++ b/Marlin/src/HAL/LPC1768/eeprom_wired.cpp
@ -19,19 +19,14 @@
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
-
-/**
- * I2C/SPI EEPROM interface for LPC1768
- */
-
 #ifdef TARGET_LPC1768

 #include "../../inc/MarlinConfig.h"

 #if USE_WIRED_EEPROM

+#include "../shared/eeprom_if.h"
 #include "../shared/eeprom_api.h"
-#include <Wire.h>

 #ifndef EEPROM_SIZE
  #define EEPROM_SIZE           0x8000 // 32kB‬
--- a/Marlin/src/HAL/LPC1768/inc/Conditionals_post.h
+++ b/Marlin/src/HAL/LPC1768/inc/Conditionals_post.h
@ -21,8 +21,6 @@
 */
 #pragma once

-#undef I2C_EEPROM // Arduino framework provides code for I2C
-
 #if USE_FALLBACK_EEPROM
  #define FLASH_EEPROM_EMULATION
 #endif
--- a/Marlin/src/HAL/SAMD51/HAL.h
+++ b/Marlin/src/HAL/SAMD51/HAL.h
@ -113,12 +113,6 @@ typedef int8_t pin_t;
 void HAL_clear_reset_source();  // clear reset reason
 uint8_t HAL_get_reset_source(); // get reset reason

-//
-// EEPROM
-//
-void eeprom_write_byte(uint8_t *pos, unsigned char value);
-uint8_t eeprom_read_byte(uint8_t *pos);
-
 //
 // ADC
 //
--- a/Marlin/src/HAL/SAMD51/eeprom_wired.cpp
+++ b/Marlin/src/HAL/SAMD51/eeprom_wired.cpp
@ -18,17 +18,16 @@
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
-
 #ifdef __SAMD51__

 #include "../../inc/MarlinConfig.h"

-#if ENABLED(EEPROM_SETTINGS) && NONE(QSPI_EEPROM, FLASH_EEPROM_EMULATION)
+#if USE_WIRED_EEPROM

+#include "../shared/eeprom_if.h"
 #include "../shared/eeprom_api.h"

 size_t PersistentStore::capacity()    { return E2END + 1; }
-
 bool PersistentStore::access_start()  { return true; }
 bool PersistentStore::access_finish() { return true; }

@ -62,5 +61,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
  return false;
 }

-#endif // EEPROM_SETTINGS && !(QSPI_EEPROM || FLASH_EEPROM_EMULATION)
+#endif // USE_WIRED_EEPROM
 #endif // __SAMD51__
--- a/Marlin/src/HAL/SAMD51/inc/Conditionals_post.h
+++ b/Marlin/src/HAL/SAMD51/inc/Conditionals_post.h
@ -23,4 +23,6 @@

 #if USE_FALLBACK_EEPROM
  #define FLASH_EEPROM_EMULATION
+#elif EITHER(I2C_EEPROM, SPI_EEPROM)
+  #define USE_SHARED_EEPROM 1
 #endif
--- a/Marlin/src/HAL/STM32/HAL.h
+++ b/Marlin/src/HAL/STM32/HAL.h
@ -191,16 +191,6 @@ static inline int freeMemory() {

 #pragma GCC diagnostic pop

-//
-// EEPROM
-//
-
-// Wire library should work for i2c EEPROMs
-void eeprom_write_byte(uint8_t *pos, unsigned char value);
-uint8_t eeprom_read_byte(uint8_t *pos);
-void eeprom_read_block(void *__dst, const void *__src, size_t __n);
-void eeprom_update_block(const void *__src, void *__dst, size_t __n);
-
 //
 // ADC
 //
--- a/Marlin/src/HAL/STM32/eeprom_flash.cpp
+++ b/Marlin/src/HAL/STM32/eeprom_flash.cpp
@ -24,7 +24,7 @@

 #include "../../inc/MarlinConfig.h"

-#if BOTH(EEPROM_SETTINGS, FLASH_EEPROM_EMULATION)
+#if ENABLED(FLASH_EEPROM_EMULATION)

 #include "../shared/eeprom_api.h"

@ -235,13 +235,7 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui

 bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
  do {
-    const uint8_t c = (
-      #if ENABLED(FLASH_EEPROM_LEVELING)
-        ram_eeprom[pos]
-      #else
-        eeprom_buffered_read_byte(pos)
-      #endif
-    );
+    const uint8_t c = TERN(FLASH_EEPROM_LEVELING, ram_eeprom[pos], eeprom_buffered_read_byte(pos));
    if (writing) *value = c;
    crc16(crc, &c, 1);
    pos++;
@ -251,14 +245,8 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
 }

 size_t PersistentStore::capacity() {
-  return (
-    #if ENABLED(FLASH_EEPROM_LEVELING)
-      EEPROM_SIZE
-    #else
-      E2END + 1
-    #endif
-  );
+  return TERN(FLASH_EEPROM_LEVELING, EEPROM_SIZE, E2END + 1);
 }

-#endif // EEPROM_SETTINGS && FLASH_EEPROM_EMULATION
+#endif // FLASH_EEPROM_EMULATION
 #endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
--- a/Marlin/src/HAL/STM32/eeprom_sram.cpp
+++ b/Marlin/src/HAL/STM32/eeprom_sram.cpp
@ -0,0 +1,64 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ * Copyright (c) 2016 Victor Perez victor_pv@hotmail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(SRAM_EEPROM_EMULATION)
+
+#include "../shared/eeprom_if.h"
+#include "../shared/eeprom_api.h"
+
+size_t PersistentStore::capacity()    { return 4096; } // 4K of SRAM
+bool PersistentStore::access_start()  { return true; }
+bool PersistentStore::access_finish() { return true; }
+
+bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
+  while (size--) {
+    uint8_t v = *value;
+
+    // Save to Backup SRAM
+    *(__IO uint8_t *)(BKPSRAM_BASE + (uint8_t * const)pos) = v;
+
+    crc16(crc, &v, 1);
+    pos++;
+    value++;
+  };
+
+  return false;
+}
+
+bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
+  do {
+    // Read from either external EEPROM, program flash or Backup SRAM
+    const uint8_t c = ( *(__IO uint8_t *)(BKPSRAM_BASE + ((uint8_t*)pos)) );
+    if (writing) *value = c;
+    crc16(crc, &c, 1);
+    pos++;
+    value++;
+  } while (--size);
+  return false;
+}
+
+#endif // SRAM_EEPROM_EMULATION
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
--- a/Marlin/src/HAL/STM32/eeprom_wired.cpp
+++ b/Marlin/src/HAL/STM32/eeprom_wired.cpp
@ -24,10 +24,13 @@

 #include "../../inc/MarlinConfig.h"

-#if EITHER(USE_WIRED_EEPROM, SRAM_EEPROM_EMULATION)
+#if USE_WIRED_EEPROM

+
+#include "../shared/eeprom_if.h"
 #include "../shared/eeprom_api.h"

+size_t PersistentStore::capacity()    { return E2END + 1; }
 bool PersistentStore::access_start()  { return true; }
 bool PersistentStore::access_finish() { return true; }

@ -35,8 +38,6 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
  while (size--) {
    uint8_t v = *value;

-    // Save to either external EEPROM, program flash or Backup SRAM
-    #if USE_WIRED_EEPROM
    // EEPROM has only ~100,000 write cycles,
    // so only write bytes that have changed!
    uint8_t * const p = (uint8_t * const)pos;
@ -47,9 +48,6 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
        return true;
      }
    }
-    #else
-      *(__IO uint8_t *)(BKPSRAM_BASE + (uint8_t * const)pos) = v;
-    #endif

    crc16(crc, &v, 1);
    pos++;
@ -62,14 +60,7 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
 bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
  do {
    // Read from either external EEPROM, program flash or Backup SRAM
-    const uint8_t c = (
-      #if USE_WIRED_EEPROM
-        eeprom_read_byte((uint8_t*)pos)
-      #else
-        (*(__IO uint8_t *)(BKPSRAM_BASE + ((uint8_t*)pos)))
-      #endif
-    );
-
+    const uint8_t c = eeprom_read_byte((uint8_t*)pos);
    if (writing) *value = c;
    crc16(crc, &c, 1);
    pos++;
@ -78,9 +69,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
  return false;
 }

-size_t PersistentStore::capacity() {
-  return TERN(USE_WIRED_EEPROM, E2END + 1, 4096); // 4K for emulated
-}
-
-#endif // USE_WIRED_EEPROM || SRAM_EEPROM_EMULATION
+#endif // USE_WIRED_EEPROM
 #endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
--- a/Marlin/src/HAL/STM32/inc/Conditionals_post.h
+++ b/Marlin/src/HAL/STM32/inc/Conditionals_post.h
@ -24,4 +24,6 @@
 // If no real or emulated EEPROM selected, fall back to SD emulation
 #if USE_FALLBACK_EEPROM
  #define SDCARD_EEPROM_EMULATION
+#elif EITHER(I2C_EEPROM, SPI_EEPROM)
+  #define USE_SHARED_EEPROM 1
 #endif
--- a/Marlin/src/HAL/STM32F1/HAL.h
+++ b/Marlin/src/HAL/STM32F1/HAL.h
@ -248,19 +248,6 @@ static int freeMemory() {

 #pragma GCC diagnostic pop

-//
-// EEPROM
-//
-
-/**
- * TODO: Write all this EEPROM stuff. Can emulate EEPROM in flash as last resort.
- * Wire library should work for i2c EEPROMs.
- */
-void eeprom_write_byte(uint8_t *pos, unsigned char value);
-uint8_t eeprom_read_byte(uint8_t *pos);
-void eeprom_read_block(void *__dst, const void *__src, size_t __n);
-void eeprom_update_block(const void *__src, void *__dst, size_t __n);
-
 //
 // ADC
 //
--- a/Marlin/src/HAL/STM32F1/eeprom_wired.cpp
+++ b/Marlin/src/HAL/STM32F1/eeprom_wired.cpp
@ -23,8 +23,11 @@

 #if USE_WIRED_EEPROM

+#include "../shared/eeprom_if.h"
 #include "../shared/eeprom_api.h"

+size_t PersistentStore::capacity()    { return E2END + 1; }
+
 bool PersistentStore::access_start() {
  #if ENABLED(SPI_EEPROM)
    #if SPI_CHAN_EEPROM1 == 1
@ -70,7 +73,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
  return false;
 }

-size_t PersistentStore::capacity() { return E2END + 1; }
-
 #endif // USE_WIRED_EEPROM
 #endif // __STM32F1__
--- a/Marlin/src/HAL/STM32F1/inc/Conditionals_post.h
+++ b/Marlin/src/HAL/STM32F1/inc/Conditionals_post.h
@ -24,4 +24,6 @@
 // If no real EEPROM, Flash emulation, or SRAM emulation is available fall back to SD emulation
 #if USE_FALLBACK_EEPROM
  #define SDCARD_EEPROM_EMULATION
+#elif EITHER(I2C_EEPROM, SPI_EEPROM)
+  #define USE_SHARED_EEPROM 1
 #endif
--- a/Marlin/src/HAL/STM32_F4_F7/HAL.h
+++ b/Marlin/src/HAL/STM32_F4_F7/HAL.h
@ -51,6 +51,8 @@
  #error "SERIAL_PORT cannot be 0. (Port 0 does not exist.) Please update your configuration."
 #elif SERIAL_PORT == -1
  #define MYSERIAL0 SerialUSB
+#elif SERIAL_PORT == 0
+  #define MYSERIAL0 Serial1
 #elif SERIAL_PORT == 1
  #define MYSERIAL0 SerialUART1
 #elif SERIAL_PORT == 2
@ -74,6 +76,8 @@
    #error "SERIAL_PORT_2 must be different than SERIAL_PORT. Please update your configuration."
  #elif SERIAL_PORT_2 == -1
    #define MYSERIAL1 SerialUSB
+  #elif SERIAL_PORT_2 == 0
+    #define MYSERIAL1 Serial1
  #elif SERIAL_PORT_2 == 1
    #define MYSERIAL1 SerialUART1
  #elif SERIAL_PORT_2 == 2
@ -103,6 +107,8 @@
    #error "DGUS_SERIAL_PORT must be different than SERIAL_PORT_2. Please update your configuration."
  #elif DGUS_SERIAL_PORT == -1
    #define DGUS_SERIAL SerialUSB
+  #elif DGUS_SERIAL_PORT == 0
+    #define DGUS_SERIAL Serial1
  #elif DGUS_SERIAL_PORT == 1
    #define DGUS_SERIAL SerialUART1
  #elif DGUS_SERIAL_PORT == 2
@ -206,19 +212,6 @@ static inline int freeMemory() {

 #pragma GCC diagnostic pop

-//
-// EEPROM
-//
-
-/**
- * TODO: Write all this EEPROM stuff. Can emulate EEPROM in flash as last resort.
- * Wire library should work for i2c EEPROMs.
- */
-void eeprom_write_byte(uint8_t *pos, unsigned char value);
-uint8_t eeprom_read_byte(uint8_t *pos);
-void eeprom_read_block (void *__dst, const void *__src, size_t __n);
-void eeprom_update_block (const void *__src, void *__dst, size_t __n);
-
 //
 // ADC
 //
--- a/Marlin/src/HAL/STM32_F4_F7/HAL_SPI.cpp
+++ b/Marlin/src/HAL/STM32_F4_F7/HAL_SPI.cpp
@ -20,6 +20,7 @@
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
+#if defined(STM32GENERIC) && (defined(STM32F4) || defined(STM32F7))

 /**
 * Software SPI functions originally from Arduino Sd2Card Library
@ -30,8 +31,6 @@
 * Adapted to the Marlin STM32F4/7 HAL
 */

-#if defined(STM32GENERIC) && (defined(STM32F4) || defined(STM32F7))
-
 #include "../../inc/MarlinConfig.h"

 #include <SPI.h>
@ -121,7 +120,7 @@ uint8_t spiRec() {
 */
 void spiRead(uint8_t* buf, uint16_t nbyte) {
  SPI.beginTransaction(spiConfig);
-  #ifdef STM32GENERIC
+  #ifndef STM32GENERIC
    SPI.dmaTransfer(0, const_cast<uint8_t*>(buf), nbyte);
  #else
    SPI.transfer((uint8_t*)buf, nbyte);
@ -153,7 +152,7 @@ void spiSend(uint8_t b) {
 void spiSendBlock(uint8_t token, const uint8_t* buf) {
  SPI.beginTransaction(spiConfig);
  SPI.transfer(token);
-  #ifdef STM32GENERIC
+  #ifndef STM32GENERIC
    SPI.dmaSend(const_cast<uint8_t*>(buf), 512);
  #else
    SPI.transfer((uint8_t*)buf, nullptr, 512);
--- a/Marlin/src/HAL/STM32_F4_F7/eeprom.cpp
+++ b/Marlin/src/HAL/STM32_F4_F7/eeprom.cpp
@ -22,12 +22,14 @@
 */
 #if defined(STM32GENERIC) && (defined(STM32F4) || defined(STM32F7))

-#include "../../inc/MarlinConfigPre.h"
+#include "../../inc/MarlinConfig.h"

 #if ENABLED(EEPROM_SETTINGS)

+#include "../shared/eeprom_if.h"
 #include "../shared/eeprom_api.h"

+size_t PersistentStore::capacity()    { return E2END + 1; }
 bool PersistentStore::access_start()  { return true; }
 bool PersistentStore::access_finish() { return true; }

@ -62,7 +64,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
  return false;
 }

-size_t PersistentStore::capacity() { return E2END + 1; }
-
 #endif // EEPROM_SETTINGS
 #endif // STM32GENERIC && (STM32F4 || STM32F7)
--- a/Marlin/src/HAL/STM32_F4_F7/eeprom_emul.cpp
+++ b/Marlin/src/HAL/STM32_F4_F7/eeprom_emul.cpp
@ -1,6 +1,6 @@
 /**
  ******************************************************************************
-  * @file    EEPROM/EEPROM_Emulation/src/eeprom.c
+  * @file    eeprom_emul.cpp
  * @author  MCD Application Team
  * @version V1.2.6
  * @date    04-November-2016
@ -49,6 +49,10 @@
  */
 #if defined(STM32GENERIC) && (defined(STM32F4) || defined(STM32F7))

+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(FLASH_EEPROM_EMULATION)
+
 /* Includes ------------------------------------------------------------------*/
 #include "eeprom_emul.h"

@ -518,6 +522,7 @@ static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data) {
  return HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, NewPageAddress, VALID_PAGE);
 }

+#endif // FLASH_EEPROM_EMULATION
 #endif // STM32GENERIC && (STM32F4 || STM32F7)

 /**
--- a/Marlin/src/HAL/STM32_F4_F7/eeprom_if_flash.cpp
+++ b/Marlin/src/HAL/STM32_F4_F7/eeprom_if_flash.cpp
@ -16,12 +16,10 @@
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
-
 #if defined(STM32GENERIC) && (defined(STM32F4) || defined(STM32F7))

 /**
- * Description: Functions for a Flash emulated EEPROM
- * Not platform dependent.
+ * Arduino-style interface for Flash emulated EEPROM
 */

 // Include configs and pins to get all EEPROM flags
@ -35,6 +33,7 @@

 #include "HAL.h"
 #include "eeprom_emul.h"
+#include "../shared/eeprom_if.h"

 // ------------------------
 // Local defines
--- a/Marlin/src/HAL/TEENSY35_36/eeprom.cpp
+++ b/Marlin/src/HAL/TEENSY35_36/eeprom.cpp
@ -29,6 +29,7 @@
 #include "../shared/eeprom_api.h"
 #include <avr/eeprom.h>

+size_t PersistentStore::capacity()    { return E2END + 1; }
 bool PersistentStore::access_start()  { return true; }
 bool PersistentStore::access_finish() { return true; }

@ -63,7 +64,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
  return false;
 }

-size_t PersistentStore::capacity() { return E2END + 1; }
-
 #endif // USE_WIRED_EEPROM
 #endif // __MK64FX512__ || __MK66FX1M0__
--- a/Marlin/src/HAL/shared/eeprom_if.h
+++ b/Marlin/src/HAL/shared/eeprom_if.h
@ -0,0 +1,30 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+//
+// EEPROM
+//
+void eeprom_write_byte(uint8_t *pos, unsigned char value);
+uint8_t eeprom_read_byte(uint8_t *pos);
+void eeprom_read_block(void *__dst, const void *__src, size_t __n);
+void eeprom_update_block(const void *__src, void *__dst, size_t __n);
--- a/Marlin/src/HAL/shared/eeprom_if_i2c.cpp
+++ b/Marlin/src/HAL/shared/eeprom_if_i2c.cpp
@ -21,20 +21,19 @@
 */

 /**
- * Description: functions for I2C connected external EEPROM.
- * Not platform dependent.
- *
- * TODO: Some platform Arduino libraries define these functions
- *       so Marlin needs to add a glue layer to prevent the conflict.
+ * Platform-independent Arduino functions for I2C EEPROM.
+ * Enable USE_SHARED_EEPROM if not supplied by the framework.
 */

 #include "../../inc/MarlinConfig.h"

-#if ENABLED(I2C_EEPROM)
+#if BOTH(USE_SHARED_EEPROM, I2C_EEPROM)

 #include "../HAL.h"
 #include <Wire.h>

+#include "eeprom_if.h"
+
 #ifndef EEPROM_WRITE_DELAY
  #define EEPROM_WRITE_DELAY    5
 #endif
@ -126,4 +125,4 @@ void eeprom_read_block(void* pos, const void *__dst, size_t n) {
    if (Wire.available()) *((uint8_t*)pos + c) = Wire.read();
 }

-#endif // I2C_EEPROM
+#endif // USE_SHARED_EEPROM && I2C_EEPROM
--- a/Marlin/src/HAL/shared/eeprom_if_spi.cpp
+++ b/Marlin/src/HAL/shared/eeprom_if_spi.cpp
@ -21,15 +21,16 @@
 */

 /**
- * Description: functions for SPI connected external EEPROM.
- * Not platform dependent.
+ * Platform-independent Arduino functions for SPI EEPROM.
+ * Enable USE_SHARED_EEPROM if not supplied by the framework.
 */

 #include "../../inc/MarlinConfig.h"

-#if ENABLED(SPI_EEPROM)
+#if BOTH(USE_SHARED_EEPROM, SPI_EEPROM)

 #include "../HAL.h"
+#include "eeprom_if.h"

 #define CMD_WREN  6   // WREN
 #define CMD_READ  2   // WRITE
@ -119,4 +120,4 @@ void eeprom_update_block(const void* src, void* eeprom_address, size_t n) {
  delay(EEPROM_WRITE_DELAY);   // wait for page write to complete
 }

-#endif // SPI_EEPROM
+#endif // USE_SHARED_EEPROM && I2C_EEPROM
--- a/Marlin/src/inc/Conditionals_adv.h
+++ b/Marlin/src/inc/Conditionals_adv.h
@ -337,3 +337,8 @@
 #else
  #define SD_CONNECTION_IS(...) 0
 #endif
+
+// Flag if an EEPROM type is pre-selected
+#if ENABLED(EEPROM_SETTINGS) && NONE(I2C_EEPROM, SPI_EEPROM, QSPI_EEPROM, FLASH_EEPROM_EMULATION, SRAM_EEPROM_EMULATION, SDCARD_EEPROM_EMULATION)
+  #define NO_EEPROM_SELECTED 1
+#endif
--- a/Marlin/src/inc/SanityCheck.h
+++ b/Marlin/src/inc/SanityCheck.h
@ -2054,8 +2054,12 @@ static_assert(hbm[Z_AXIS] >= 0, "HOMING_BUMP_MM.Z must be greater than or equal
 /**
 * Make sure only one EEPROM type is enabled
 */
-#if ENABLED(EEPROM_SETTINGS) && 1 < ENABLED(SDCARD_EEPROM_EMULATION) + ENABLED(FLASH_EEPROM_EMULATION) + ENABLED(SRAM_EEPROM_EMULATION)
-  #error "Please select only one of SDCARD, FLASH, or SRAM_EEPROM_EMULATION."
+#if ENABLED(EEPROM_SETTINGS)
+  #if 1 < 0 \
+    + ENABLED(I2C_EEPROM) + ENABLED(SPI_EEPROM) + ENABLED(QSPI_EEPROM) \
+    + ENABLED(SDCARD_EEPROM_EMULATION) + ENABLED(FLASH_EEPROM_EMULATION) + ENABLED(SRAM_EEPROM_EMULATION)
+    #error "Please select only one method of EEPROM Persistent Storage."
+  #endif
 #endif

 /**
--- a/Marlin/src/module/printcounter.h
+++ b/Marlin/src/module/printcounter.h
@ -28,12 +28,8 @@
 // Print debug messages with M111 S2
 //#define DEBUG_PRINTCOUNTER

-#if USE_WIRED_EEPROM
-  // round up address to next page boundary (assuming 32 byte pages)
-  #define STATS_EEPROM_ADDRESS 0x40
-#else
-  #define STATS_EEPROM_ADDRESS 0x32
-#endif
+// Round up I2C / SPI address to next page boundary (assuming 32 byte pages)
+#define STATS_EEPROM_ADDRESS TERN(USE_WIRED_EEPROM, 0x40, 0x32)

 struct printStatistics {    // 16 bytes
  //const uint8_t magic;    // Magic header, it will always be 0x16
@ -57,7 +53,7 @@ class PrintCounter: public Stopwatch {
  private:
    typedef Stopwatch super;

-    #if USE_WIRED_EEPROM || defined(CPU_32_BIT)
+    #if EITHER(USE_WIRED_EEPROM, CPU_32_BIT)
      typedef uint32_t eeprom_address_t;
    #else
      typedef uint16_t eeprom_address_t;
--- a/Marlin/src/pins/stm32f0/pins_MALYAN_M300.h
+++ b/Marlin/src/pins/stm32f0/pins_MALYAN_M300.h
@ -31,7 +31,9 @@
 //
 // EEPROM Emulation
 //
+#if NO_EEPROM_SELECTED
  #define FLASH_EEPROM_EMULATION
+#endif

 //
 // SD CARD SPI
--- a/Marlin/src/pins/stm32f1/pins_BTT_SKR_E3_DIP.h
+++ b/Marlin/src/pins/stm32f1/pins_BTT_SKR_E3_DIP.h
@ -33,11 +33,13 @@
 // Ignore temp readings during development.
 //#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000

+#if EITHER(NO_EEPROM_SELECTED, FLASH_EEPROM_EMULATION)
  #define FLASH_EEPROM_EMULATION
  #define EEPROM_PAGE_SIZE     (0x800U) // 2KB
  #define EEPROM_START_ADDRESS (0x8000000UL + (STM32_FLASH_SIZE) * 1024UL - (EEPROM_PAGE_SIZE) * 2UL)
  #undef E2END
  #define E2END                (EEPROM_PAGE_SIZE - 1) // 2KB
+#endif

 //
 // Servos
--- a/Marlin/src/pins/stm32f1/pins_BTT_SKR_MINI_E3.h
+++ b/Marlin/src/pins/stm32f1/pins_BTT_SKR_MINI_E3.h
@ -31,11 +31,13 @@
 // Ignore temp readings during development.
 //#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000

+#if EITHER(NO_EEPROM_SELECTED, FLASH_EEPROM_EMULATION)
  #define FLASH_EEPROM_EMULATION
  #define EEPROM_PAGE_SIZE     (0x800U) // 2KB
  #define EEPROM_START_ADDRESS (0x8000000UL + (STM32_FLASH_SIZE) * 1024UL - (EEPROM_PAGE_SIZE) * 2UL)
  #undef E2END
  #define E2END                (EEPROM_PAGE_SIZE - 1) // 2KB
+#endif

 //
 // Servos
--- a/Marlin/src/pins/stm32f1/pins_BTT_SKR_MINI_V1_1.h
+++ b/Marlin/src/pins/stm32f1/pins_BTT_SKR_MINI_V1_1.h
@ -33,10 +33,12 @@
 // Ignore temp readings during development.
 //#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000

+#if EITHER(NO_EEPROM_SELECTED, FLASH_EEPROM_EMULATION)
  #define FLASH_EEPROM_EMULATION
  #define EEPROM_PAGE_SIZE     (0x800U) // 2KB
  #define EEPROM_START_ADDRESS (0x8000000UL + (STM32_FLASH_SIZE) * 1024UL - (EEPROM_PAGE_SIZE) * 2UL)
  #define E2END                (EEPROM_PAGE_SIZE - 1)
+#endif

 //
 // Limit Switches
--- a/Marlin/src/pins/stm32f1/pins_FYSETC_AIO_II.h
+++ b/Marlin/src/pins/stm32f1/pins_FYSETC_AIO_II.h
@ -38,11 +38,13 @@
 //
 // Flash EEPROM Emulation
 //
+#if EITHER(NO_EEPROM_SELECTED, FLASH_EEPROM_EMULATION)
  #define FLASH_EEPROM_EMULATION
  #define EEPROM_PAGE_SIZE     (0x800U) // 2KB
  #define EEPROM_START_ADDRESS (0x8000000UL + (STM32_FLASH_SIZE) * 1024UL - (EEPROM_PAGE_SIZE) * 2UL)
  #undef E2END
  #define E2END                (EEPROM_PAGE_SIZE - 1) // 2KB
+#endif

 //
 // Limit Switches
--- a/Marlin/src/pins/stm32f1/pins_FYSETC_CHEETAH.h
+++ b/Marlin/src/pins/stm32f1/pins_FYSETC_CHEETAH.h
@ -35,11 +35,13 @@

 #define DISABLE_JTAG

+#if EITHER(NO_EEPROM_SELECTED, FLASH_EEPROM_EMULATION)
  #define FLASH_EEPROM_EMULATION
  #define EEPROM_PAGE_SIZE     (0x800U) // 2KB
  #define EEPROM_START_ADDRESS (0x8000000UL + (STM32_FLASH_SIZE) * 1024UL - (EEPROM_PAGE_SIZE) * 2UL)
  #undef E2END
  #define E2END                (EEPROM_PAGE_SIZE - 1) // 2KB
+#endif

 //
 // Servos
--- a/Marlin/src/pins/stm32f1/pins_GTM32_MINI.h
+++ b/Marlin/src/pins/stm32f1/pins_GTM32_MINI.h
@ -52,8 +52,10 @@
 //#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000

 // Enable EEPROM Emulation for this board as it doesn't have EEPROM
+#if EITHER(NO_EEPROM_SELECTED, FLASH_EEPROM_EMULATION)
  #define FLASH_EEPROM_EMULATION
  #define E2END 0xFFF                             // 4KB
+#endif

 //
 // Limit Switches
--- a/Marlin/src/pins/stm32f1/pins_GTM32_MINI_A30.h
+++ b/Marlin/src/pins/stm32f1/pins_GTM32_MINI_A30.h
@ -52,8 +52,10 @@
 //#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000

 // Enable EEPROM Emulation for this board as it doesn't have EEPROM
+#if EITHER(NO_EEPROM_SELECTED, FLASH_EEPROM_EMULATION)
  #define FLASH_EEPROM_EMULATION
  #define E2END 0xFFF                             // 4KB
+#endif

 //
 // Limit Switches
--- a/Marlin/src/pins/stm32f1/pins_GTM32_PRO_VB.h
+++ b/Marlin/src/pins/stm32f1/pins_GTM32_PRO_VB.h
@ -52,8 +52,10 @@
 //#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000

 // Enable EEPROM Emulation for this board as it doesn't have EEPROM
+#if EITHER(NO_EEPROM_SELECTED, FLASH_EEPROM_EMULATION)
  #define FLASH_EEPROM_EMULATION
  #define E2END 0xFFF                             // 4KB
+#endif

 //
 // Limit Switches
--- a/Marlin/src/pins/stm32f1/pins_GTM32_REV_B.h
+++ b/Marlin/src/pins/stm32f1/pins_GTM32_REV_B.h
@ -52,8 +52,10 @@
 //#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000

 // Enable EEPROM Emulation for this board as it doesn't have EEPROM
+#if EITHER(NO_EEPROM_SELECTED, FLASH_EEPROM_EMULATION)
  #define FLASH_EEPROM_EMULATION
  #define E2END 0xFFF                             // 4KB
+#endif

 //
 // Limit Switches
--- a/Marlin/src/pins/stm32f1/pins_JGAURORA_A5S_A1.h
+++ b/Marlin/src/pins/stm32f1/pins_JGAURORA_A5S_A1.h
@ -44,9 +44,11 @@

 //#define I2C_EEPROM                              // AT24C64
 //#define E2END 0x7FFFUL                          // 64KB
+
 //#define FLASH_EEPROM_EMULATION
 //#define E2END 0xFFFUL                           // 4KB
 //#define E2END (EEPROM_START_ADDRESS + (EEPROM_PAGE_SIZE) * 2UL - 1UL)
+
 //#define EEPROM_CHITCHAT
 //#define DEBUG_EEPROM_READWRITE

--- a/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
+++ b/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
@ -147,8 +147,10 @@
 // Persistent Storage
 // If no option is selected below the SD Card will be used
 //
+#if NO_EEPROM_SELECTED
  //#define SPI_EEPROM
  #define FLASH_EEPROM_EMULATION
+#endif

 #undef E2END
 #if ENABLED(SPI_EEPROM)
--- a/Marlin/src/pins/stm32f1/pins_MALYAN_M200.h
+++ b/Marlin/src/pins/stm32f1/pins_MALYAN_M200.h
@ -31,10 +31,10 @@

 #define BOARD_INFO_NAME "Malyan M200"

-// Enable EEPROM Emulation for this board
-// This setting should probably be in configuration.h
-// but it is literally the only board which uses it.
+// Assume Flash EEPROM
+#if NO_EEPROM_SELECTED
  #define FLASH_EEPROM_EMULATION
+#endif

 #define SDSS                              SS_PIN

--- a/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_MINI.h
+++ b/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_MINI.h
@ -38,11 +38,13 @@
 //
 #define DISABLE_DEBUG

+#if EITHER(NO_EEPROM_SELECTED, FLASH_EEPROM_EMULATION)
  #define FLASH_EEPROM_EMULATION
  // 2K in a AT24C16N
  #define EEPROM_PAGE_SIZE     (0x800U) // 2KB
  #define EEPROM_START_ADDRESS (0x8000000UL + (STM32_FLASH_SIZE) * 1024UL - (EEPROM_PAGE_SIZE) * 2UL)
  #define E2END (EEPROM_PAGE_SIZE - 1)
+#endif

 //
 // Note: MKS Robin mini board is using SPI2 interface.
--- a/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_NANO.h
+++ b/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_NANO.h
@ -41,8 +41,10 @@
 //
 // EEPROM
 //
+#if NO_EEPROM_SELECTED
  //#define FLASH_EEPROM_EMULATION
  #define SDCARD_EEPROM_EMULATION
+#endif

 //
 // Limit Switches
--- a/Marlin/src/pins/stm32f4/pins_BTT_BTT002_V1_0.h
+++ b/Marlin/src/pins/stm32f4/pins_BTT_BTT002_V1_0.h
@ -30,8 +30,10 @@
 #define BOARD_INFO_NAME "BIGTREE Btt002 1.0"

 // Use one of these or SDCard-based Emulation will be used
+#if NO_EEPROM_SELECTED
  //#define SRAM_EEPROM_EMULATION                 // Use BackSRAM-based EEPROM emulation
  #define FLASH_EEPROM_EMULATION                  // Use Flash-based EEPROM emulation
+#endif

 // Ignore temp readings during development.
 //#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000
--- a/Marlin/src/pins/stm32f4/pins_BTT_GTR_V1_0.h
+++ b/Marlin/src/pins/stm32f4/pins_BTT_GTR_V1_0.h
@ -32,9 +32,11 @@
 #define BOARD_INFO_NAME "BIGTREE GTR 1.0"

 // Use one of these or SDCard-based Emulation will be used
+#if NO_EEPROM_SELECTED
  //#define I2C_EEPROM
  //#define SRAM_EEPROM_EMULATION                 // Use BackSRAM-based EEPROM emulation
  //#define FLASH_EEPROM_EMULATION                // Use Flash-based EEPROM emulation
+#endif

 #define TP                                        // Enable to define servo and probe pins

@ -389,3 +391,5 @@
  //#define DOGLCD_MOSI                     PB15

 #endif // HAS_SPI_LCD
+
+#undef TP
--- a/Marlin/src/pins/stm32f4/pins_BTT_SKR_PRO_V1_1.h
+++ b/Marlin/src/pins/stm32f4/pins_BTT_SKR_PRO_V1_1.h
@ -30,8 +30,10 @@
 #define BOARD_INFO_NAME "BIGTREE SKR Pro 1.1" // redefined?

 // Use one of these or SDCard-based Emulation will be used
+#if NO_EEPROM_SELECTED
  //#define SRAM_EEPROM_EMULATION                 // Use BackSRAM-based EEPROM emulation
  #define FLASH_EEPROM_EMULATION                  // Use Flash-based EEPROM emulation
+#endif

 //
 // Servos
--- a/Marlin/src/pins/stm32f4/pins_FYSETC_S6.h
+++ b/Marlin/src/pins/stm32f4/pins_FYSETC_S6.h
@ -34,19 +34,21 @@
  #define DEFAULT_MACHINE_NAME BOARD_INFO_NAME
 #endif

-// change the prio to 3 , 2 is for software serial
+// Change the priority to 3. Priority 2 is for software serial.
 //#define TEMP_TIMER_IRQ_PRIO 3

 //
 // EEPROM Emulation
 //
+#if NO_EEPROM_SELECTED
  #define FLASH_EEPROM_EMULATION
-#if ENABLED(FLASH_EEPROM_EMULATION)
-  #define FLASH_EEPROM_LEVELING
-#endif
  //#define SRAM_EEPROM_EMULATION
  //#define I2C_EEPROM
-#ifdef I2C_EEPROM
+#endif
+
+#if ENABLED(FLASH_EEPROM_EMULATION)
+  #define FLASH_EEPROM_LEVELING
+#elif ENABLED(I2C_EEPROM)
  #undef E2END                                    // Defined in Arduino Core STM32 to be used with EEPROM emulation. This board uses a real EEPROM.
  #define E2END 0xFFF                             // 4KB
 #endif
--- a/Marlin/src/pins/stm32f7/pins_REMRAM_V1.h
+++ b/Marlin/src/pins/stm32f7/pins_REMRAM_V1.h
@ -28,7 +28,9 @@
 #define BOARD_INFO_NAME      "RemRam v1"
 #define DEFAULT_MACHINE_NAME "RemRam"

+#if NO_EEPROM_SELECTED
  #define SRAM_EEPROM_EMULATION                   // Emulate the EEPROM using Backup SRAM
+#endif

 #if HOTENDS > 1 || E_STEPPERS > 1
  #error "RemRam supports only one hotend / E-stepper."