pc机与rs232串口的通讯C51源程序。

Ps2键盘驱动程序，用C51单片机驱动PS2键盘接口

DS1302的驱动程序。主程序用C语言编写，驱动用汇编编写。用KEIL C编译通过。-DS1302 drivers. Main program with C language, drivers used to prepare the compilation. Using KEIL C compiler through.

此为友善之臂micro2440板的底板原理图，更新时间是2009年2月28日。-This is a friendly arm on the Backplane board micro2440 schematic, update time is February 28, 2009.

rc500 c语言库函数，对RC500的开发提供了捷径-rc500 c language library functions, the development of RC500 provides a shortcut

CPU卡读写，符合7816标准。经测试完全可以使用。-CPU card reader, in line with the 7816 standards. Been tested and can be used.

计算CRC16/CRC8/CRC32的程序，可获得CRC-CCITT/CRC-16/CRC-8/CRC-32的计算结果。 提供Delphi源代码和MCS51单片机的汇编源代码，分别采用两至三种不同算法实现。有比较详细的调用和使用说明。 更新历史: 2003/05/04 新增CRC-8算法的实现。 2004/02/02 修改CRC-8算法，新增CRC-32算法，增加比较详细的调用和使用说明。-CRC16/CRC8/CRC32 calculation procedures available CRC-CCITT/CRC-16/CRC-8/CRC-32 the calculated results. Delphi provide source code and compile the MCS51 source code, adopted two to three different algorithm. A more detailed calls and use. Update History : 2003/05/02 new CRC-8 algorithm implementation. 2004/02/02 changes CRC-8 algorithm, the new CRC-32 algorithm, adding more detailed calls and use.

程序的规划，从开始到结束都有比较详尽的解说，对初学者到比较成熟有帮助-Program planning, from start to finish has a more detailed explanation, to be helpful for beginners to the more mature

LED灯控制程序，用78F9212单片机，C语言，PWM控制，可调光-LED lamp control procedures, using 78F9212 Singlechip, C language, PWM control, dimmable

凌阳单片机的MAX7219驱动程序（测试通过）-Sunplus the MAX7219 single-chip driver (test)

这是一个很好的键扫描电路和显示控制程序