We want to do use the EEPROM Emulation feature of S32K144 to save data in Non Volatile Memory in our application.
I have read the EEPROM emulation application notes and as per this application notes I have wrote few command to check the EEPROM functionality.
I have wrote 3 string in flexNVM(at address 0x14000000). I have done power cycle to check the content but its not showing any data in memory. After Reset I have kept the break point before the Partition command executes again to avoid the data loss.Also I have used the below Memory Preservation options.
please find the below code. I have wrote below routines.Is there any command has to execute after every Software Reset ? or Memory controller will dump the backup data to FlexRAM Automatically.
Or Can I get example or sample code for EEPROM Emulation ?
void EEPROM_Emulation(void)
{
/*********SET UP THE FLASH CLOCK REGISTER********/
//EEE_Test_code();
/* FTFC clock has to enabled in SW */
PCC->PCCn[PCC_FTFC_INDEX] |= PCC_PCCn_CGC_MASK;
while ((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == 0x00); /* Bit Polling for Command Completion Check */
if(((FTFC->FSTAT & FTFC_FSTAT_ACCERR_MASK) == 0x20) || ((FTFC->FSTAT & FTFC_FSTAT_FPVIOL_MASK) == 0x10))
{
FTFC->FSTAT = Clear_old_errors; /* Clear the old errors */
}
/* Program partition command */
FTFC-> FCCOB [3] = 0x80; /* FCCOB0: Selects the PGMPART command */
FTFC-> FCCOB [2] = 0x00; /* FCCOB1: No CSEc operation */
FTFC-> FCCOB [1] = 0x00; /* FCCOB2: No CSEc operation */
FTFC-> FCCOB [0] = 0x00; /* FCCOB3: FlexRAM loaded with valid EEPROM during reset sequence */
FTFC-> FCCOB [7] = 0x02; /* FCCOB4: EEPROM data set size code: EEESIZE = 2 (4 kB) */
FTFC-> FCCOB [6] = 0x04; /* FCCOB5: FlexNVM Partition code: DEPART = 4 (Data flash: 0 kB, EEPROM
backup: 64 kB) */
FTFC->FSTAT = Flash_launch_command; /* flash launch Command */
while ((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == 0x00); /* Bit Polling for Command Completion Check */
if(((FTFC->FSTAT & FTFC_FSTAT_ACCERR_MASK) == 0x20) || ((FTFC->FSTAT & FTFC_FSTAT_FPVIOL_MASK) == 0x10))
{
FTFC->FSTAT = Clear_old_errors; /* Clear the old errors */
}
FTFC-> FCCOB [3] = 0x81; /* FCCOB0: Selects the SETRAM command */
FTFC-> FCCOB [2] = 0x00; /* FCCOB1: Make FlexRAM available for emulated EEPROM */
FTFC->FSTAT = Flash_launch_command; /* flash launch Command */
while ((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == 0x00); /* Bit Polling for Command Completion Check */
EEE_Test_code(); /* Writes 3 strings at Flex RAM adddress 0x14000000*/
}
