本文件是I2C总线读写EEPROM(AT24C02)测试程序；将跳线器JP6的1，2脚短接，JP10的1，2脚短接，当按下KEY1，KEY2，KEY3任一键时会将对应的键值“1”，“2”，“3”写入EEPROM，同时数码管有提示，程序只保存最后一个键值，当按下KEY4时，程序会读出保存的最后一个键值，同时显示在数码管上。-This document is the I2C bus to read and write EEPROM (AT24C02) test procedures　the 1,2-foot jumper shorted JP6, JP10 shorted 1,2 feet, when the press KEY1, KEY2, KEY3 any key will correspond to key " 1" , " 2" , " 3"　into the EEPROM, while digital has prompted, the program saves only the last key, when pressed KEY4, the program will read the last saved key, also showed the digital pipe.