51与pc串口通讯，主要用c语言编写，相信对初学者会有好处的

液晶显示程序，初始化、命令字的控制，完整版-LCD procedures, initialization, command control characters, the full version

modbus RTU 的C51源程序,单片机89S52,编译器keilC7.06-modbus RTU source code with c51,mcu atmel89s52,complite use keilC7.06

Loops back EP2OUT to EP6IN and EP4OUT to EP8IN.

基于C51的充气泵控制系统程序源码，可以实现精确控制-C51-based control system for inflatable pump source program, can achieve precise control

128×64液晶接口程序，开发出图形，进度条等等许多实用的子程序，方便移植，方便大家！-128 64 LCD interface program to develop graphics, and so on the progress of the many practical subroutine to facilitate transplantation, convenient!

单片机开发类网站集锦-MCU Development website Collection

是利用红外实现无线传输的一个无线温度预警系统的相关资料。-Realize the use of infrared wireless transmission of a wireless temperature warning system relevant information.

AD型单片机使用手册-AD-SCM Manuals

超声传感器原理图及资料 -Ultrasonic sensor schematics and information

：章介绍了数据采集系统中STC12系列单片机与PC机之间的串行通信。设计了sTc12c2052AD 与 MAX232的硬件电路，使用汇编语言编程，设置了串行1：7的工作方式，相应的波特率计算方法及特点，发送并接 收数据。单片机从EEPROM 中读取数据，通过R．S-232将其传入PC，并将数据存储在24C02中。-: Chapter introduces data acquisition system STC12 Series MCU and PC serial communication between machines. Designed sTc12c2052AD with MAX232 hardware circuit, the use of assembly language programming, set up the way the work of serial 1:7, the corresponding baud rate calculation method and the characteristics of sending and receiving data. Single-chip EEPROM read data from, by R. S-232 to incoming PC, and data storage in the 24C02.