说明：  用于STM32工程中的模拟IIC代码，附带24C02测试接口。 模拟接口比硬件接口灵活性高，可以随意调整管脚，最关键的是容错能力强。 进行了连续测试，表现稳定。
(For STM32 engineering simulation IIC code, supplied with 24C02 test interface. Analog interface flexibility than hardware interface, can freely adjust pin, the most critical is the fault-tolerant capability. Carried out continuous testing, performance and stability.)