一个单片机的I^2C 总线通信和数据传输的程序，I^2C 总线在信息和数据传输方面用的非常广泛，主要是单片机的外围扩展-A single chip I ^ 2C bus communications and data transfer procedures, I ^ 2C bus in the information and data used in a wide range of areas, mainly the expansion of single-chip peripherals