用单片机的两IO脚去控制24C02上的时钟脚（SCL）和数据脚（SDA）的电平高低，来传送数据。根据时序图，来写程序。(The level of the clock foot (SCL) and the data foot (SDA) on the 24C02 is controlled by the two IO foot of the single chip computer to transmit the data. Write the program according to the time sequence diagram.)