How to solve EE_INVALID_PAGE_SEQUENCE using STM32Cube X-CUBE-EEPROM package.

[manto.1]

I am trying to initialize EEprom with followin two lines. First line return EE_OK but calling EE_Init() returns EE_INVALID_PAGE_SEQUENCE

	  ee_status = EE_Format(EE_FORCED_ERASE);    // ee_status = EE_OK
	  ee_status = EE_Init(EE_FORCED_ERASE);          // ee_status = EE_INVALID_PAGE_SEQUENCE

Why does this happen and how to solve this issue.

This is my eeprom_emul_conf.h

/* Configuration of eeprom emulation in flash, can be custom */
#define START_PAGE_ADDRESS      0x00ea0000U /*!< Start address of the 1st page in flash, for EEPROM emulation */
#define CYCLES_NUMBER           1U   /*!< Number of 10Kcycles requested, minimum 1 for 10Kcycles (default),
                                        for instance 10 to reach 100Kcycles. This factor will increase
                                        pages number */
#define GUARD_PAGES_NUMBER      2U   /*!< Number of guard pages avoiding frequent transfers (must be multiple of 2): 0,2,4.. */
 
/* Configuration of crc calculation for eeprom emulation in flash */
//#define CRC_POLYNOMIAL_LENGTH   LL_CRC_POLYLENGTH_16B /* CRC polynomial lenght 16 bits */
//#define CRC_POLYNOMIAL_VALUE    0x8005U /* Polynomial to use for CRC calculation */
#define CRC_POLYNOMIAL_LENGTH   LL_CRC_POLYLENGTH_32B /* CRC polynomial lenght 16 bits */
#define CRC_POLYNOMIAL_VALUE    LL_CRC_DEFAULT_CRC32_POLY /* Polynomial to use for CRC calculation */
 
 
#define NB_OF_VARIABLES         100U  /*!< Number of variables to handle in eeprom */
 
/**

[StéphaneM]

Hello Manto,

could you please tell us if this issue is systematic or happens only on some devices.

Which STM32 (or board are you using ?)

Best regards,

Stéphane

[manto.1]

We are using STM32H750 with external flash W25Q128JV. Cube-EEPROM library is used for writing some parameters into external flash. Recently I figured that It works If I write into different region. But still I would like to know why I was not able to initialize and how to handle this error.

[StéphaneM · Accepted solution]

the XCUBE-EEPROM software is designed to work with the MCU internal Flash. It has to be adapted for the external Flash characteristics (Flash line size, Flash page size...).