Original post: https://community.st.com/t5/stm32-mcus-products/stm32h7-flash-crc/td-p/887279
Github: https://github.com/STMicroelectronics/stm32h7xx-hal-driver/blob/1501be883dae6f202c1d3f856ee6b11407dc257d/Src/stm32h7xx_hal_flash_ex.c#L733
HAL_StatusTypeDef HAL_FLASHEx_ComputeCRC(FLASH_CRCInitTypeDef *pCRCInit, uint32_t *CRC_Result)
{
...
...
FLASH->CRCCR1 |= FLASH_CRCCR_CLEAN_CRC | pCRCInit->BurstSize | pCRCInit->TypeCRC;
...
...
}
|= will not program the expected burst size if the reset value is not b00. It looks like on reset the value is b01 (16 flash words). So if user try to set to burst size of 4 flash words (b00) it'll remain set to b01.
