C8051F32X的usb鼠标例程，c语言编写，包含完整的通信协议

这是用vhdl语言写8051单片机的文档和程序.-vhdl This is the language used to write 8051"s files and procedures.

用汇编语言编写的6位8段数码管显示程序与MS-51单片机实验系统配合使用-assembly language prepared by six of eight digital control display program with the MS-51 used in conjunction with experimental system

求任意个数的平均值，输入数字就可以求得结果，是本人学习汇编的习作，请多指教。-seeking arbitrary number, the average import figures can be obtained result is a compilation of my learning exercises, please enlighten.

两个DB18B20来显示温度，在ＫＥＩＬＣ下编译调试成功-Two DB18B20 to display temperature, in the debug compile successfully under KEILC

用at89s52访问MAX7219(LED数码显示）-AT89S52 visit with MAX7219 (LED digital display)

mifare 读卡器weigant输出有kei uvision打开！-MIFARE reader weigant output is Kei uvision open!

我自己刚刚做的一个频率计，不是很会！希望大家给我提意见-I have just done a frequency counter, it will not! I hope to put forward their views

周立功DP51+试验板程序-weeks meritorious DP51 plate test procedures

There are many different (and often confusing) terms associated with clock-based devices. This application note attempts to clarify these terms, and hence serves as a comprehensive reference on clock terminology. This application note can be divided into two sections. The first section describes and distinguishes between various clock sources available today. The second section defines and distinguishes between various parameters used to describe clocks. This section also provides methods of measuring some of these parameters.

///*** *** *** * //一、程序说明： //1, 24LC02器件地址是1010000R/W. //2, 数组写入24LC02采取页写方式. //3, 数组code从24LC02读出时采取自由读方式. //4, 采用4.00M晶体。 //5，采用软件I2C。 //二、硬件连接： //1， SDA------->23 pin.(当然你可以任意选择脚位） //2, SCL------->18 Pin.(当然你可以任意选择脚位） //3， PORTB----->数码管的段输出 //4， RD4，RD5，RC6，RC7------->数码管的位输出(数码管为共阴极） -///*******************// A description of the procedures:// 1, 24LC02 device address is 1010000R/W.// 2, write an array to take 24LC02 page write mode.// 3, the array read out the code from the 24LC02 to take a free read.// 4, using 4.00M crystal.// 5, using software I2C.// Second, the hardware to connect:// 1, SDA-------> 23 pin. (Of course, you can choose to pin)// 2, SCL-------> 18 Pin. (Of course You can choose pin)// 3, PORTB-----> digital tube output segment// 4, RD4, RD5, RC6, RC7-------> digital pipe-bit output (digital tube for a total of cathode)