/* Lock the Option Byte Access. 
This disables write access to the option bytes. It is locked by default on reset.  */
void flash_lock_option_bytes(void)
/* Lock the Option Byte Access. 
This disables write access to the option bytes. It is locked by default on reset.  */
void flash_lock_option_bytes(void)
{
	FLASH_OPTCR |= FLASH_OPTCR_OPTLOCK;
}