C8051芯片的I2C总线控制程序，包含五段代码（读写EEPROM,主控读写单字节，多字节，被动读写单字节，多字节）-C8051 chip of I2C bus control procedures, including five sections code (reading and writing EEPROM, master literacy single-byte, many bytes, passive literacy single-byte, multibyte)