From 19024306fc834fbead89e749d64d352194befa84 Mon Sep 17 00:00:00 2001
From: DocYester <46453559+DocYester@users.noreply.github.com>
Date: Mon, 8 Jun 2020 02:48:18 +0200
Subject: [PATCH] Robin E3D Flash-based EEPROM (#18219)

---
 Marlin/src/pins/stm32f1/pins_MKS_ROBIN_E3.h          | 11 +++++++++++
 Marlin/src/pins/stm32f1/pins_MKS_ROBIN_E3D.h         | 11 +++++++++++
 buildroot/share/PlatformIO/ldscripts/mks_robin_e3.ld |  2 +-
 3 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_E3.h b/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_E3.h
index 5e8f89d56..9ef17e39c 100644
--- a/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_E3.h
+++ b/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_E3.h
@@ -40,6 +40,17 @@
 #define DISABLE_JTAG
 #define ENABLE_SPI2
 
+//
+// EEPROM
+//
+#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
 //
diff --git a/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_E3D.h b/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_E3D.h
index e6cf4e528..53cd8bb50 100644
--- a/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_E3D.h
+++ b/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_E3D.h
@@ -40,6 +40,17 @@
 #define DISABLE_JTAG
 #define ENABLE_SPI2
 
+//
+// EEPROM
+//
+#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
 //
diff --git a/buildroot/share/PlatformIO/ldscripts/mks_robin_e3.ld b/buildroot/share/PlatformIO/ldscripts/mks_robin_e3.ld
index 13fa48add..2404e7cac 100644
--- a/buildroot/share/PlatformIO/ldscripts/mks_robin_e3.ld
+++ b/buildroot/share/PlatformIO/ldscripts/mks_robin_e3.ld
@@ -1,7 +1,7 @@
 MEMORY
 {
   ram (rwx) : ORIGIN = 0x20000000, LENGTH = 48K - 40
-  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 256K - 20K
+  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 256K - 20K - 4K
 }
 
 /* Provide memory region aliases for common.inc */