说明：  本系统是基于IIC EEPROM的，故对2401的读写采用了阻塞的方式，读不到数据或写不入数据就不退出。
(The system is based on the IIC EEPROM, the read and write it on the 2401 adoption of the obstruction of the way, reading nothing less than the data or write data will not quit.)