给予STM32和RFID的门禁管理系统，长按取消键删除档案，长按确认键添加档案，长按上键清除所有档案，长按下键读出所有档案。-Access control system with STM32 and RFID, press the Cancel button to delete the file, press the confirm button to add files, long press the button to remove all files, long press the key