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运行于c51单片机上的用keil c创建的C源程序,采用PDIUSBD12接口。-run on the microcontroller with Keil c create C source code using PDIUSBD12 interface.

最简单的时钟程序，用的是2051的芯片，有图，有说明，很详细。不会的一看就会，会的不要见笑-most simple clock procedures, using the 2051 chip, a map, descriptions, very detailed. No one will look at, not laughed at the

是一些单片机的串口通信程序，用C语言编写。-Is the number of single-chip serial communication program, using C language.

DS1302+DS18B20+LCD1602在51系统上的实时时钟-DS1302+ DS18B20+ LCD1602 system in 51 real-time clock

自己写的温度显示程序，在开发板上可以验证成功 -Write their own temperature display program in the development of on-board can verify the success of

51单片机测量电机转速，利用计数脉冲数显示到汉字液晶屏上面。脉冲是由对管扫描码盘产生的-51 MCU measuring motor speed using pulse-counting the number of

X5045的读写应用程序，经过测试，完全能用-X5045 reading and writing applications, tested and fully use

Atmel Uart C51程序（timer1方式）-Uart (timer1 way)

该头文件配合key.c，在main函数中调用key.c，都文件中添加key.h，使软件更清晰，一目了然-The header file with key.c, in the main function call key.c, all files add key.h, so that software is more clear at a glance

USB程序源代码,包括PC端和单片机端.USB控制芯片为PIDUSBD12.-USB source code, including the PC client and single-chip client. USB controller chip for PIDUSBD12.