EEPROM emulation problem on STM32H563
Hi,
I'm facing problem in reading data from EEPROM, which was written before power cycle.
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!