EEPROM emulation problem on STM32H563ZI

[Bhuvi-Naveen]

Hi,

1. I'm facing problem in reading data from EEPROM, which was written before power cycle.
2. EE_Init() always causes formatting of EEPROM irrespective of EE_CONDITIONAL_ERASE or EE_FORCED_ERASE parameter passed, resulting in erasing the previous data

Configuration: "STM32H5 series using high-cycle data area" with EDATA_ENABLED & START_PAGE_ADDRESS 0x0900C000U

I'm using the latest version of EEPROM emulation driver "X-CUBE-EEPROM version-6.0.0" on dev kit "NUCLEO-H563ZI"

The example code works fine, it is able to write and read the data from the flash every time on power up by formatting the page, but when I wanted to read the data which was written in previous cycle, It always reads data zero.

The reason I found was, it always give current page status as "ERASING".

I made the following change in function FindPage(), having a switch case operation for "FIND_READ_PAGE" by adding a check currentpagestatus == STATE_PAGE_VALID as shown below.

I added STATE_PAGE_VALID check instead of STATE_PAGE_ERASING, because, the debugger shows the current page status as valid in function FindPage()

case FIND_READ_PAGE: /* ---- Read operation ---- / if (currentpagestatus == STATE_PAGE_ACTIVE || currentpagestatus == STATE_PAGE_VALID) { return currentpage; } else { if (currentpagestatus == STATE_PAGE_RECEIVE) { return previouspage; } else { return EE_NO_PAGE_FOUND; / No active Page */ } }

In main.c I added the following code just before initializing the EE_Init ConfigureCrc(); for (Index = 1; Index < NB_OF_VARIABLES+1; Index++) { EE_ReadVariable32bits(Index, &a_VarDataTab[Index-1]); } with the above change I'm now able to read data which was written in previously.

Am I missing some settings? please help!