说明：  EEPROM 24C64的读写操作，后面编写测试程序，先给EEPROM写数据，然后将结果读出通过串口回传给主机显示。
(EEPROM 24C64 of read and write operation, after the preparation of test procedures, give data EEPROM write, and then read out the result through the serial port back to the host display.)