关于MCU与其它I2C器件的通讯已经有很多开发了，但是如何正确地掌握时序尤其是了解何时写的过程是否已完成至关重要。网上有很多朋友碰到这个头痛不已的问题，本文就是借Microchip的P18f2455与EEPROM 24A128之间的通讯展示这个解决方法。请特别注意程式中的ack_polling的使用。-We have many friends who faced communication timing problems when dealing with I2C in between MCU and other I2C devices. Here we demonstrated with Microchip s Pic18f2455 and 24A128 on the I2C writing timing program, please pay attention specially to ack_polling procedure.