I2C程序函数是采用软件延时的方法产生SCL脉冲,对高晶振频率要作一定的修改(本例是3us机器周期,如果系统对时间要求不是很重要的话,最好在每个单元读写结束时加个延时，测试有子地址器件函数，未测试无地址的器件，适合器件地址和子地址小于256的器件， 大于256的单元的器件可以自己改写)。

I2C procedure function is the method using software delay generated SCL pulses of high frequency crystal oscillator to make certain amendments to C (in this case is 3us machine cycle, if the system time-not very important, then, the best in the the end of each module to add read and write latency, test device subaddress function, not to test nuclear device address for the device address and the subaddress is less than 256 devices, more than 256 unit device can rewrite).