按键控制声音输出，C语言编写，keil下调试通过,大家相互学习...

c8051f120端口模拟的I2C,点亮PCF8574驱动的发光二极管-c8051f120 simulated port I2C, lit PCF8574-driven light-emitting diodes

SD卡资料大全，在网上找了好久的，供大家开发SD卡查询。-SD card Sourcebook, the Internet looking for a long time, and for all to develop SD card queries.

89C52的键盘扫描LED显示及串口程序。 用Keil C51开发。用通用实验板调试通过。 -89C52 keyboard scanning LED display and serial procedures. Using Keil C51 development. Experiments with GM through the debug board.

8051单片机点对多机通讯，希望对大家又所帮助，我也需要下载资料啊！-8051 points on the multi-machine communications, and they hope to also help everyone, I also need to download the information ah!

单片机的串行口测试程序-MCU serial port test procedures

将51单片机程序装化为二进制代码 利于在rom中重写-to 51 SCM procedures loaded into binary code which will help the rewrite rom

程控直流数控电源，在keil环境下编写的，使用STC系列单片机实现的简易数控电源，具有掉电保存数据等功能。-NC program-controlled DC power supply, the environment in the keil prepared, using a simple STC series single-chip microcomputer numerical control power supply, with power-down functions to save data.

用0832做的波形发生器 做信号的可以看看 用单片机控制的-0832

图形显示12232检测要用keil生成hex再用-Graphical display generated 12,232 detection using keil reuse hex

4-20MA信号发生器，含电路图，使用说明以及汇编源程序-4-20MA signal generator, including schematics, source code for use as well as the compilation