如果你想学习C51的越快，这个资源也许会给你一个帮手。

用C语言编写的对时钟芯片ds1302读写的单片机程序，内附详细的注释说明。-Using C language to read and write to the DS1302 clock chip microcontroller procedures, containing detailed notes.

Samsung 2440 sample keypad example in C

电子秒表的设计 1、用系统8253定时器提供的55ms定时单位，设计秒表定时程序。 2、有关系统定时方法： PC机系统中的8253定时器0工作于方式3，外部提供一个时钟作为CLK信号, 频率：f=1.1931816MHz。 定时器0输出方波的频率:fout=1.1931816/65536=18.2Hz。 输出方波的周期Tout=1/18.2=54.945ms。8253A每隔55ms引起一次中断-Electronic stopwatch design one, using the system timer 8253 provides 55ms timing units, design stopwatch timing procedures. 2, the system timing method: PC system timer 0 of 8253 working in the way of 3, to provide an external clock as the CLK signal, the frequency: f = 1.1931816MHz. Timer 0 output square wave frequency: fout = 1.1931816/65536 = 18.2Hz. Cycle square wave output Tout = 1/18.2 = 54.945ms. 8253A every 55ms caused a disruption

在keil c51 环境下利用中断方式查询 键盘并实现键值查询等功能-Keil c51 environment in the use of the keyboard interrupt inquiries and realize the functions of key inquiries

1602液晶模块的显示驱动头文件，可直接调用函数进行字符，字符串的输出，以及各种模式选择，光标快速定位等-1602 LCD display driver header files can be directly call function characters, string output, and a variety of mode selection, cursor positioning, such as rapid

自已编写的一个用于调试单片机串口的一个下位机程序。很实用的。-own prepared by a serial port for debugging MCU of a crew under the procedure. Very practical.

L297+L298控制步进电机，用proteus进行仿真-L297+ L298 stepper motor control, using Proteus simulation

由单片机89c2051模拟IIC和ZLG7290实现键盘的识别驱动程序。-89C2051 simulated by the single-chip IIC and realize ZLG7290 identification of the keyboard driver.

p89lpc932单片机的A/D转换详细资料和源程序代码-P89LPC932 MCU A/D conversion details and source code

LED的显示功能，以及步进电机的驱动程序，打开程序后见程序中的I/O的备注就可以，只作为参考-LED display function, as well as stepper motor drivers, see the procedure to open procedure in the I/O