Added EEPROM emulation for STM32F042x6 series processors (#10685)

* Added STM32F042x6 support for EEPROM emulation

* Default to lower stack size on STM32F042

* Moved stack setting

* Re-moved stack definition

* Removed unnecessary check

1 files changed, 11 insertions, 0 deletions

diff --git a/common_features.mk b/common_features.mk
index ed6908f4b..e0ae1d74c 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -114,6 +114,17 @@ else
         SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
         OPT_DEFS += -DEEPROM_EMU_STM32F072xB
         OPT_DEFS += -DSTM32_EEPROM_ENABLE
+      else ifeq ($(MCU_SERIES)_$(MCU_LDSCRIPT), STM32F0xx_STM32F042x6)
+
+        # Stack sizes: Since this chip has limited RAM capacity, the stack area needs to be reduced.
+        # This ensures that the EEPROM page buffer fits into RAM
+        USE_PROCESS_STACKSIZE = 0x600
+        USE_EXCEPTIONS_STACKSIZE = 0x300
+        
+        SRC += $(PLATFORM_COMMON_DIR)/eeprom_stm32.c
+        SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
+        OPT_DEFS += -DEEPROM_EMU_STM32F042x6
+        OPT_DEFS += -DSTM32_EEPROM_ENABLE
       else ifneq ($(filter $(MCU_SERIES),STM32L0xx STM32L1xx),)
         OPT_DEFS += -DEEPROM_DRIVER
         COMMON_VPATH += $(DRIVER_PATH)/eeprom