remove stm32L0x and stm32L1x EEPROM buffered functions

Removing the buffered access to EEPROM
as it is not well-suited for stm32L0x and stm32L1x
which have actual EEPROM area

Signed-off-by: Francois Ramu <francois.ramu@st.com>

Author: FRASTM

cores/arduino/stm32/stm32_eeprom.h

@@ -107,10 +107,14 @@ extern "C" {
 uint8_t eeprom_read_byte(const uint32_t pos);
 void eeprom_write_byte(uint32_t pos, uint8_t value);
 
+#if defined(DATA_EEPROM_BASE)
+#error "eeprom_buffer functions are not supported"
+#else
 void eeprom_buffer_fill();
 void eeprom_buffer_flush();
 uint8_t eeprom_buffered_read_byte(const uint32_t pos);
 void eeprom_buffered_write_byte(uint32_t pos, uint8_t value);
+#endif /* DATA_EEPROM_BASE */
 
 #ifdef __cplusplus
 }

libraries/SrcWrapper/src/stm32/stm32_eeprom.c

@@ -142,7 +142,9 @@ static inline uint32_t get_flash_end(void)
 #endif
 #endif /* FLASH_BASE_ADDRESS */
 
+#if !defined(DATA_EEPROM_BASE)
 static uint8_t eeprom_buffer[E2END + 1] __attribute__((aligned(8))) = {0};
+#endif
 
 /**
   * @brief  Function reads a byte from emulated eeprom (flash)
@@ -191,6 +193,10 @@ void eeprom_write_byte(uint32_t pos, uint8_t value)
 #endif /* _EEPROM_BASE */
 }
 
+#if defined(DATA_EEPROM_BASE)
+#error "eeprom_buffer functions are not supported"
+#else
+
 /**
   * @brief  Function reads a byte from the eeprom buffer
   * @param  pos : address to read
@@ -332,6 +338,8 @@ void eeprom_buffer_flush(void)
 
 #endif /* defined(EEPROM_RETRAM_MODE) */
 
+#endif /* DATA_EEPROM_BASE */
+
 #ifdef __cplusplus
 }
 #endif