DES/3DES算法的C语言实现，我对代码进行优化。只需要几十个字节的内存就可以。很适合用于单片机等下位机使用。...

pcf8563是一种实时的日历时钟芯片，它解决了计时的千年问题。-pcf8563 a real-time clock chip calendar, it has resolved a time of the Millennium problems.

nRF905无线FSK芯片在51单片机上工作的代码-nRF905 FSK wireless chip microcontroller in 51 working on the code

单片机c8051f020片内温度传感器的使用，将是主流的8位单片机-C8051f020 microcontroller chip temperature sensor use, will be the mainstream of 8-bit microcontrollers

51 与PC串口通信，IO口模拟串口显示，-AT892051

多功能遥控小车的软硬件设计程序，包括使小车前进、后退、左转弯、右转弯、左滚动、右滚动的基本指令，以及完整程序清单。-Multi-function remote control car of the hardware and software design process, including the car forward, backward, left turn, right turn, left scroll, right scroll the basic commands, as well as the complete list of procedures.

秒表程序-Stopwatch program

AT91所有开发板的资料 AT91所有开发板的资料-porting all development board all the information porting Development Board of porting all of the information development board

自制51编程器的资料是业余电子爱好者的工具，能让我们亲自制作一个51编程器。- The self-made 51 programming materials are the extra-curricular electronic amateur s tools, can let us personally manufacture 51 programming.

键盘扫描的一种方法经过调试可以运行!键盘扫描的一种方法经过调试可以运行-A method of scanning the keyboard after debugging can run! Keyboard scan after a method of debugging can run

一个单片机上的sd卡驱动程序，支持fat32，fat16等文件系统，很有参考价值。-A microcontroller on the sd card driver and support fat32, fat16 file system, etc., of great reference value.