温度传感器DS18B20的使用，通过51单片机与DS18B20的通讯，得到周围的温度信息，并且在液晶显示屏1602上显示-the use of the temperature sensor DS18B20

时钟芯片1302的使用，通过51单片机与时钟芯片1302的通讯得到精确的时钟，并在液晶显示屏1602上实时显示-the use of clock chip 1602

51单片机的IIC程序，可以通过AT24C02与1602液晶显示器通讯-51 MCU IIC program, through 1602 LCD with AT24C02 communication

液晶点阵图形显示器(LCD)接口电路的C编程,里面还包涵液晶显示图片程序，几个详细的液晶显示屏说明文档，还有基于工业51单片机的通讯程序。-Liquid crystal lattice graphic display (LCD) C programming interface circuit, which also includes LCD image process, a few details of the LCD screen documentation, and based on the