I used the same function to erase s32k116 and s32k144，the function is FLASH_DRV_EraseSector.
And my question is when I erase s32k116 flash I must put the fucntion FLASH_DRV_EraseSector in ram, otherwise the MCU would be reset.but when I erase s32k144 flash, I can put he fucntion FLASH_DRV_EraseSector in flash, and MCU runs well. I also know when MCU is erasing flash, MCU should not accese flash. But why s32k144 can access flash while erasing flash?
The function FLASH_DRV_EraseSector as follow:
uint32 FLASH_DRV_EraseSector(uint32 dest, uint32 size)
{
uint32 ret = RESULT_OK; /* Return code variable */
uint32 sectorSize; /* Size of one sector */
uint32 tempSize = size; /* Temporary of size variation */
LMEM->PCCCR = 0x85000001; /* Invalidate cache & enable write buffer, cache */
MSCM->OCMDR[0] = 0x00000020; /* Bit 5 = 1: Enable program flash prefetch buffer */
MSCM->OCMDR[1] = 0x00000020; /* Bit 5 = 1: Enable data flash prefetch buffer */
sectorSize = (uint32)FEATURE_FLS_PF_BLOCK_SECTOR_SIZE;
/* Check if the size is sector alignment or not */
if ((tempSize & (sectorSize - 1U)) != 0U)
{
/* Return an error code */
return RESULT_ERR;
}
while ((tempSize > 0U) && (RESULT_OK == ret))
{
/* Check CCIF to verify the previous command is completed */
if (0U == (FTFx_FSTAT & FTFx_FSTAT_CCIF_MASK))
{
ret = RESULT_ERR;
}
else
{
/* Clear RDCOLERR & ACCERR & FPVIOL flag in flash status register. Write 1 to clear */
CLEAR_FTFx_FSTAT_ERROR_BITS;
/* Passing parameter to the command */
FTFx_FCCOB0 = FTFx_ERASE_SECTOR;
FTFx_FCCOB1 = GET_BIT_16_23(dest);
FTFx_FCCOB2 = GET_BIT_8_15(dest);
FTFx_FCCOB3 = GET_BIT_0_7(dest);
/* Calling flash command sequence function to execute the command */
ret = FLASH_DRV_CommandSequence();
/* Update size and destination address */
tempSize -= sectorSize;
dest += sectorSize;
}
}
return ret;
}
Look forward to your feedback, Thank you in advance!
Best regards!
Chen
