I tried to use FLASH_TYPEPROGRAM_FAST in a G0B1 but is not working after a page erase. I suppose it will work with mass erase but not tried. Only works FLASH_TYPEPROGRAM_DOUBLEWORD.
I've also tried to make my own function to write only 32bits modifing FLASH_Program_DoubleWord(), but again it doesn't like it and goes to HardFault_Handler()
Edit: Post moved from the old thread STM32G0 and FLASH_TYPEPROGRAM_FAST fail. Starting a new thread is better to have more chance to check the question by Community members. Don't hesitate to provide more details that can help to understand the problem and what you did as tests.
