由于是个初学者,对Ｉ２Ｃ总线从来没有接触过,看了几遍Ｉ２Ｃ总线规则后,有了点了解,觉的在单片机这样ＩＯ口资源不是相对充足的芯片上,来扩展总线接口,Ｉ２Ｃ是最好的选择了(As a beginner, the I2C bus has not contacted, read several times I2C bus rules, know a little, feel in the SCM IO port such resources are not relatively enough to ext