How to program internal flash memory of STM32H745ZIQ Controller using HAL API?

[DDosh.2003]

I am having problem with program flash by 8 bits. How can i change the default bit settings to 8 bit.I am using the HAL_FLASH_Program api and i tries to set psize of bank 1 by __HAL_FLASH_SET_PSIZE(FLASH_PSIZE_BYTE,FLASH_BANK_1) api but no success.

Please help.