STM32H743 Flash compute Crc

[fernandes]

Hi people,

I'm trying to use the flash crc but is not working as expected. If I pass the end address with offset 3 or 7 the result of crc calc will be always the same, 0xba4bbbf0. What the problem here?

FLASH_CRCInitTypeDef flash_crc_init = {
    .TypeCRC = FLASH_CRC_ADDR,
    .BurstSize = FLASH_CRC_BURST_SIZE_4,
    .Bank = FLASH_BANK_2,
    .Sector = FLASH_SECTOR_0,
    .NbSectors = 1,
    .CRCStartAddr = FLASH_BANK2_BASE,
    .CRCEndAddr = FLASH_BANK2_BASE + 7
};

uint32_t flash_crc_result = 0;

if(HAL_FLASHEx_Unlock_Bank2() == HAL_OK)
{
    HAL_StatusTypeDef hal_status = HAL_FLASHEx_ComputeCRC(&flash_crc_init, flash_crc_result);
}

The address has this values:

[TDK · Accepted solution]

The data must be aligned to chunks of the 4x flash word size (or whatever you have selected as the burst size). In this case, it must be aligned to 128-bytes. The minimum size is therefore 128 bytes.

[SofLit]

Hello,

You forgot & before flash_crc_result in the HAL_FLASHEx_ComputeCRC() input parameter:

HAL_StatusTypeDef hal_status = HAL_FLASHEx_ComputeCRC(&flash_crc_init, &flash_crc_result);

[fernandes]

That's correct, this document said the same

[fernandes]

I'm sorry, on my local code is corretc