/* Unlock program memory itself. Writes the magic sequence to unlock the program memory you must have already unlocked access to this register!  */
void flash_unlock_progmem(void)
/* Unlock program memory itself. Writes the magic sequence to unlock the program memory you must have already unlocked access to this register!  */
void flash_unlock_progmem(void)
{
	FLASH_PRGKEYR = FLASH_PRGKEYR_PRGKEY1;
	FLASH_PRGKEYR = FLASH_PRGKEYR_PRGKEY2;
}