说明：  IIC读写EEPOM 24C02 数据程序。51单片机将测量数据写入到EEPROM中，停电后也不会丢失数据。用IIC总线读存储在24C02中的数据，便于用户比较和管理。
(IIC data read and write procedures EEPOM 24C02. 51 Single-chip measurement data will be written to EEPROM, the blackout also would not lose data. With IIC bus read is stored in the 24C02 data, comparison and user-friendly management.)