该文件实现对24C02的操作。确认试验是否成功：电源上电后，数码管的值在递增，观察值。关闭电源，待几秒后上电，数码管显示的值会从断电时的那个值开始显示。-the document is the realizationto of 24C02 operation. How to confirm the test is successful: when power-up, digital tube value in increasing, you should observe the value. T