函数是采用软件延时的方法产生SCL脉冲,固对高晶振频率要作 一定的修改....(本软件包是1us机器周期,即晶振频率要小于12MHZ)总线时序符合I2C标准模式,100Kbit/S。-Functions is the software delay SCL pulse, solid high crystal frequency to make some changes .... (This package is the 1us machine cycle, the crystal frequency is less than 12MHZ) bus timing in line with the I2C standardmode, under 100 kbit/S.